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-rw-r--r--Documentation/ABI/testing/sysfs-class-dual-role-usb71
-rw-r--r--Documentation/ABI/testing/sysfs-kernel-wakeup_reasons16
-rw-r--r--Documentation/android.txt121
-rw-r--r--Documentation/block/00-INDEX6
-rw-r--r--Documentation/block/mmc-max-speed.txt38
-rw-r--r--Documentation/cpu-freq/governors.txt85
-rw-r--r--Documentation/device-mapper/boot.txt42
-rw-r--r--Documentation/device-mapper/verity.txt40
-rw-r--r--Documentation/devicetree/bindings/goldfish/audio.txt17
-rw-r--r--Documentation/devicetree/bindings/goldfish/battery.txt17
-rw-r--r--Documentation/devicetree/bindings/goldfish/events.txt17
-rw-r--r--Documentation/devicetree/bindings/goldfish/tty.txt17
-rw-r--r--Documentation/devicetree/bindings/misc/memory-state-time.txt8
-rw-r--r--Documentation/devicetree/bindings/misc/ramoops.txt43
-rw-r--r--Documentation/devicetree/bindings/scheduler/sched-energy-costs.txt360
-rw-r--r--Documentation/filesystems/proc.txt24
-rw-r--r--Documentation/kernel-parameters.txt6
-rw-r--r--Documentation/networking/ip-sysctl.txt10
-rw-r--r--Documentation/ramoops.txt6
-rw-r--r--Documentation/scheduler/sched-energy.txt362
-rw-r--r--Documentation/scheduler/sched-tune.txt366
-rw-r--r--Documentation/sync.txt75
-rw-r--r--Documentation/sysctl/kernel.txt15
-rw-r--r--Documentation/sysctl/vm.txt45
-rw-r--r--Documentation/trace/events-power.txt1
-rw-r--r--Documentation/trace/ftrace.txt49
-rw-r--r--android/configs/README15
-rw-r--r--android/configs/android-base.cfg172
-rw-r--r--android/configs/android-recommended.cfg129
-rw-r--r--arch/Kconfig68
-rw-r--r--arch/arm/Kconfig33
-rw-r--r--arch/arm/Kconfig.debug8
-rw-r--r--arch/arm/Makefile5
-rw-r--r--arch/arm/boot/.gitignore1
-rw-r--r--arch/arm/boot/Makefile13
-rw-r--r--arch/arm/boot/compressed/head.S2
-rw-r--r--arch/arm/boot/dts/Makefile12
-rw-r--r--arch/arm/common/Kconfig4
-rw-r--r--arch/arm/common/Makefile1
-rw-r--r--arch/arm/common/fiq_glue.S118
-rw-r--r--arch/arm/common/fiq_glue_setup.c147
-rw-r--r--arch/arm/configs/ranchu_defconfig316
-rw-r--r--arch/arm/include/asm/fiq_glue.h33
-rw-r--r--arch/arm/include/asm/pgtable-3level.h1
-rw-r--r--arch/arm/include/asm/topology.h7
-rw-r--r--arch/arm/kernel/asm-offsets.c12
-rw-r--r--arch/arm/kernel/kgdb.c4
-rw-r--r--arch/arm/kernel/process.c75
-rw-r--r--arch/arm/kernel/reboot.c30
-rw-r--r--arch/arm/kernel/setup.c2
-rw-r--r--arch/arm/kernel/topology.c149
-rw-r--r--arch/arm/kernel/vmlinux.lds.S4
-rw-r--r--arch/arm/mm/cache-v6.S17
-rw-r--r--arch/arm/mm/fault.c4
-rw-r--r--arch/arm/mm/mmap.c3
-rw-r--r--arch/arm/mm/mmu.c2
-rw-r--r--arch/arm64/Kconfig78
-rw-r--r--arch/arm64/Kconfig.debug6
-rw-r--r--arch/arm64/Makefile9
-rw-r--r--arch/arm64/boot/.gitignore2
-rw-r--r--arch/arm64/boot/Makefile16
-rw-r--r--arch/arm64/boot/dts/Makefile14
-rw-r--r--arch/arm64/configs/ranchu64_defconfig312
-rw-r--r--arch/arm64/include/asm/alternative.h86
-rw-r--r--arch/arm64/include/asm/assembler.h50
-rw-r--r--arch/arm64/include/asm/barrier.h3
-rw-r--r--arch/arm64/include/asm/cpufeature.h6
-rw-r--r--arch/arm64/include/asm/efi.h33
-rw-r--r--arch/arm64/include/asm/esr.h1
-rw-r--r--arch/arm64/include/asm/futex.h17
-rw-r--r--arch/arm64/include/asm/kernel-pgtable.h28
-rw-r--r--arch/arm64/include/asm/memory.h6
-rw-r--r--arch/arm64/include/asm/mmu_context.h53
-rw-r--r--arch/arm64/include/asm/module.h5
-rw-r--r--arch/arm64/include/asm/spinlock.h10
-rw-r--r--arch/arm64/include/asm/thread_info.h3
-rw-r--r--arch/arm64/include/asm/topology.h9
-rw-r--r--arch/arm64/include/asm/uaccess.h175
-rw-r--r--arch/arm64/kernel/armv8_deprecated.c11
-rw-r--r--arch/arm64/kernel/asm-offsets.c3
-rw-r--r--arch/arm64/kernel/cpufeature.c1
-rw-r--r--arch/arm64/kernel/efi.c334
-rw-r--r--arch/arm64/kernel/entry.S78
-rw-r--r--arch/arm64/kernel/head.S9
-rw-r--r--arch/arm64/kernel/process.c66
-rw-r--r--arch/arm64/kernel/setup.c11
-rw-r--r--arch/arm64/kernel/topology.c81
-rw-r--r--arch/arm64/kernel/traps.c28
-rw-r--r--arch/arm64/kernel/vmlinux.lds.S12
-rw-r--r--arch/arm64/lib/clear_user.S11
-rw-r--r--arch/arm64/lib/copy_from_user.S11
-rw-r--r--arch/arm64/lib/copy_in_user.S11
-rw-r--r--arch/arm64/lib/copy_to_user.S11
-rw-r--r--arch/arm64/mm/cache.S8
-rw-r--r--arch/arm64/mm/context.c7
-rw-r--r--arch/arm64/mm/dma-mapping.c2
-rw-r--r--arch/arm64/mm/fault.c37
-rw-r--r--arch/arm64/mm/init.c16
-rw-r--r--arch/arm64/mm/mmap.c8
-rw-r--r--arch/arm64/mm/mmu.c22
-rw-r--r--arch/arm64/mm/proc-macros.S98
-rw-r--r--arch/arm64/mm/proc.S11
-rw-r--r--arch/arm64/xen/hypercall.S15
-rw-r--r--arch/ia64/include/asm/early_ioremap.h10
-rw-r--r--arch/ia64/include/asm/io.h5
-rw-r--r--arch/mips/mm/mmap.c4
-rw-r--r--arch/powerpc/kernel/process.c4
-rw-r--r--arch/powerpc/mm/mmap.c4
-rw-r--r--arch/sparc/kernel/sys_sparc_64.c2
-rw-r--r--arch/x86/Kconfig16
-rw-r--r--arch/x86/Makefile2
-rw-r--r--arch/x86/configs/i386_ranchu_defconfig423
-rw-r--r--arch/x86/configs/x86_64_ranchu_defconfig418
-rw-r--r--arch/x86/include/asm/idle.h7
-rw-r--r--arch/x86/include/asm/uaccess.h4
-rw-r--r--arch/x86/kernel/process.c17
-rw-r--r--arch/x86/mm/mmap.c12
-rw-r--r--block/blk-core.c84
-rw-r--r--block/genhd.c17
-rw-r--r--block/partition-generic.c11
-rw-r--r--drivers/android/Kconfig12
-rw-r--r--drivers/android/binder.c1005
-rw-r--r--drivers/base/dd.c3
-rw-r--r--drivers/base/power/main.c40
-rw-r--r--drivers/base/power/power.h3
-rw-r--r--drivers/base/power/wakeup.c32
-rw-r--r--drivers/base/syscore.c3
-rw-r--r--drivers/char/random.c22
-rw-r--r--drivers/cpufreq/Kconfig45
-rw-r--r--drivers/cpufreq/Makefile1
-rw-r--r--drivers/cpufreq/cpufreq.c65
-rw-r--r--drivers/cpufreq/cpufreq_interactive.c1367
-rw-r--r--drivers/cpuidle/cpuidle.c4
-rw-r--r--drivers/cpuidle/governors/menu.c7
-rw-r--r--drivers/dma-buf/fence.c6
-rw-r--r--drivers/firmware/efi/Makefile3
-rw-r--r--drivers/firmware/efi/arm-init.c221
-rw-r--r--drivers/firmware/efi/arm-runtime.c135
-rw-r--r--drivers/firmware/efi/efi.c2
-rw-r--r--drivers/hid/hid-sensor-hub.c3
-rw-r--r--drivers/input/Kconfig13
-rw-r--r--drivers/input/Makefile3
-rw-r--r--drivers/input/keyboard/goldfish_events.c45
-rw-r--r--drivers/input/keycombo.c261
-rw-r--r--drivers/input/keyreset.c144
-rw-r--r--drivers/input/misc/Kconfig16
-rw-r--r--drivers/input/misc/Makefile2
-rw-r--r--drivers/input/misc/gpio_axis.c192
-rw-r--r--drivers/input/misc/gpio_event.c228
-rw-r--r--drivers/input/misc/gpio_input.c390
-rw-r--r--drivers/input/misc/gpio_matrix.c441
-rw-r--r--drivers/input/misc/gpio_output.c97
-rw-r--r--drivers/input/misc/keychord.c391
-rw-r--r--drivers/md/Kconfig45
-rw-r--r--drivers/md/Makefile6
-rw-r--r--drivers/md/dm-android-verity.c925
-rw-r--r--drivers/md/dm-android-verity.h121
-rw-r--r--drivers/md/dm-cache-target.c3
-rw-r--r--drivers/md/dm-crypt.c14
-rw-r--r--drivers/md/dm-ioctl.c39
-rw-r--r--drivers/md/dm-linear.c30
-rw-r--r--drivers/md/dm-snap.c6
-rw-r--r--drivers/md/dm-table.c1
-rw-r--r--drivers/md/dm-verity-fec.c870
-rw-r--r--drivers/md/dm-verity-fec.h159
-rw-r--r--drivers/md/dm-verity-target.c (renamed from drivers/md/dm-verity.c)632
-rw-r--r--drivers/md/dm-verity.h139
-rw-r--r--drivers/media/tuners/tuner-xc2028.c6
-rw-r--r--drivers/misc/Kconfig12
-rw-r--r--drivers/misc/Makefile2
-rw-r--r--drivers/misc/memory_state_time.c454
-rw-r--r--drivers/misc/uid_cputime.c240
-rw-r--r--drivers/mmc/card/Kconfig12
-rw-r--r--drivers/mmc/card/block.c324
-rw-r--r--drivers/mmc/card/queue.c6
-rw-r--r--drivers/mmc/card/queue.h8
-rw-r--r--drivers/mmc/core/Kconfig15
-rw-r--r--drivers/mmc/core/core.c109
-rw-r--r--drivers/mmc/core/host.c17
-rw-r--r--drivers/mmc/core/host.h5
-rw-r--r--drivers/mmc/core/sd.c83
-rw-r--r--drivers/mmc/core/sdio.c115
-rw-r--r--drivers/mmc/core/sdio_bus.c13
-rw-r--r--drivers/mmc/core/sdio_io.c33
-rw-r--r--drivers/mtd/nand/Kconfig10
-rw-r--r--drivers/net/ppp/Kconfig17
-rw-r--r--drivers/net/ppp/Makefile2
-rw-r--r--drivers/net/ppp/pppolac.c448
-rw-r--r--drivers/net/ppp/pppopns.c427
-rw-r--r--drivers/net/tun.c11
-rw-r--r--drivers/net/wireless/brcm80211/brcmfmac/sdio.c7
-rw-r--r--drivers/net/wireless/ti/wlcore/init.c5
-rw-r--r--drivers/of/fdt.c68
-rw-r--r--drivers/platform/Kconfig2
-rw-r--r--drivers/platform/goldfish/Kconfig18
-rw-r--r--drivers/platform/goldfish/Makefile5
-rw-r--r--drivers/platform/goldfish/goldfish_pipe.c323
-rw-r--r--drivers/platform/goldfish/goldfish_pipe.h91
-rw-r--r--drivers/platform/goldfish/goldfish_pipe_v2.c889
-rw-r--r--drivers/power/goldfish_battery.c17
-rw-r--r--drivers/power/power_supply_sysfs.c11
-rw-r--r--drivers/rtc/rtc-palmas.c44
-rw-r--r--drivers/scsi/ufs/ufshcd.c81
-rw-r--r--drivers/scsi/ufs/ufshcd.h3
-rw-r--r--drivers/staging/android/Kconfig11
-rw-r--r--drivers/staging/android/Makefile1
-rw-r--r--drivers/staging/android/ashmem.c30
-rw-r--r--drivers/staging/android/fiq_debugger/Kconfig58
-rw-r--r--drivers/staging/android/fiq_debugger/Makefile4
-rw-r--r--drivers/staging/android/fiq_debugger/fiq_debugger.c1248
-rw-r--r--drivers/staging/android/fiq_debugger/fiq_debugger.h64
-rw-r--r--drivers/staging/android/fiq_debugger/fiq_debugger_arm.c240
-rw-r--r--drivers/staging/android/fiq_debugger/fiq_debugger_arm64.c202
-rw-r--r--drivers/staging/android/fiq_debugger/fiq_debugger_priv.h37
-rw-r--r--drivers/staging/android/fiq_debugger/fiq_debugger_ringbuf.h94
-rw-r--r--drivers/staging/android/fiq_debugger/fiq_watchdog.c56
-rw-r--r--drivers/staging/android/fiq_debugger/fiq_watchdog.h20
-rw-r--r--drivers/staging/android/ion/Kconfig7
-rw-r--r--drivers/staging/android/ion/ion.c55
-rw-r--r--drivers/staging/android/ion/ion_carveout_heap.c2
-rw-r--r--drivers/staging/android/ion/ion_page_pool.c8
-rw-r--r--drivers/staging/android/ion/ion_priv.h34
-rw-r--r--drivers/staging/android/ion/ion_system_heap.c8
-rw-r--r--drivers/staging/android/lowmemorykiller.c115
-rw-r--r--drivers/staging/android/sync.c14
-rw-r--r--drivers/staging/android/trace/lowmemorykiller.h41
-rw-r--r--drivers/staging/android/uapi/ashmem.h1
-rw-r--r--drivers/staging/goldfish/Kconfig6
-rw-r--r--drivers/staging/goldfish/Makefile5
-rw-r--r--drivers/staging/goldfish/goldfish_audio.c23
-rw-r--r--drivers/staging/goldfish/goldfish_sync.c987
-rw-r--r--drivers/tty/goldfish.c40
-rw-r--r--drivers/tty/serial/serial_core.c3
-rw-r--r--drivers/usb/gadget/Kconfig50
-rw-r--r--drivers/usb/gadget/composite.c6
-rw-r--r--drivers/usb/gadget/configfs.c259
-rw-r--r--drivers/usb/gadget/function/Makefile8
-rw-r--r--drivers/usb/gadget/function/f_accessory.c1328
-rw-r--r--drivers/usb/gadget/function/f_audio_source.c1060
-rw-r--r--drivers/usb/gadget/function/f_midi.c66
-rw-r--r--drivers/usb/gadget/function/f_mtp.c1537
-rw-r--r--drivers/usb/gadget/function/f_mtp.h18
-rw-r--r--drivers/usb/gadget/function/f_ptp.c38
-rw-r--r--drivers/usb/gadget/function/f_rndis.c30
-rw-r--r--drivers/usb/gadget/function/rndis.c112
-rw-r--r--drivers/usb/gadget/function/rndis.h2
-rw-r--r--drivers/usb/gadget/function/u_ether.c301
-rw-r--r--drivers/usb/gadget/function/u_ether.h3
-rw-r--r--drivers/usb/phy/Kconfig17
-rw-r--r--drivers/usb/phy/Makefile2
-rw-r--r--drivers/usb/phy/class-dual-role.c529
-rw-r--r--drivers/usb/phy/otg-wakelock.c173
-rw-r--r--drivers/video/Kconfig1
-rw-r--r--drivers/video/Makefile1
-rw-r--r--drivers/video/adf/Kconfig14
-rw-r--r--drivers/video/adf/Makefile17
-rw-r--r--drivers/video/adf/adf.c1188
-rw-r--r--drivers/video/adf/adf.h71
-rw-r--r--drivers/video/adf/adf_client.c811
-rw-r--r--drivers/video/adf/adf_fbdev.c665
-rw-r--r--drivers/video/adf/adf_fops.c946
-rw-r--r--drivers/video/adf/adf_fops.h37
-rw-r--r--drivers/video/adf/adf_fops32.c217
-rw-r--r--drivers/video/adf/adf_fops32.h78
-rw-r--r--drivers/video/adf/adf_format.c280
-rw-r--r--drivers/video/adf/adf_memblock.c166
-rw-r--r--drivers/video/adf/adf_sysfs.c296
-rw-r--r--drivers/video/adf/adf_sysfs.h33
-rw-r--r--drivers/video/adf/adf_trace.h93
-rw-r--r--drivers/video/fbdev/goldfishfb.c18
-rw-r--r--drivers/w1/masters/ds2482.c47
-rw-r--r--fs/Kconfig1
-rw-r--r--fs/Makefile5
-rw-r--r--fs/attr.c12
-rw-r--r--fs/binfmt_elf.c2
-rw-r--r--fs/coredump.c2
-rw-r--r--fs/dcache.c1
-rw-r--r--fs/eventpoll.c6
-rw-r--r--fs/exec.c2
-rw-r--r--fs/ext4/ext4.h3
-rw-r--r--fs/ext4/inline.c6
-rw-r--r--fs/ext4/inode.c27
-rw-r--r--fs/ext4/ioctl.c6
-rw-r--r--fs/ext4/mballoc.c28
-rw-r--r--fs/ext4/readpage.c41
-rw-r--r--fs/f2fs/data.c21
-rw-r--r--fs/f2fs/inline.c11
-rw-r--r--fs/fs-writeback.c2
-rw-r--r--fs/fs_struct.c3
-rw-r--r--fs/fuse/dev.c10
-rw-r--r--fs/fuse/dir.c45
-rw-r--r--fs/fuse/fuse_i.h3
-rw-r--r--fs/inode.c6
-rw-r--r--fs/internal.h4
-rw-r--r--fs/mpage.c30
-rw-r--r--fs/namei.c179
-rw-r--r--fs/namespace.c32
-rw-r--r--fs/notify/fanotify/fanotify_user.c2
-rw-r--r--fs/notify/inotify/inotify_user.c17
-rw-r--r--fs/open.c37
-rw-r--r--fs/pnode.c29
-rw-r--r--fs/pnode.h1
-rw-r--r--fs/proc/base.c137
-rw-r--r--fs/proc/kcore.c31
-rw-r--r--fs/proc/task_mmu.c64
-rw-r--r--fs/proc_namespace.c8
-rw-r--r--fs/pstore/platform.c36
-rw-r--r--fs/pstore/pmsg.c35
-rw-r--r--fs/pstore/ram.c132
-rw-r--r--fs/pstore/ram_core.c47
-rw-r--r--fs/sdcardfs/Kconfig13
-rw-r--r--fs/sdcardfs/Makefile7
-rw-r--r--fs/sdcardfs/dentry.c186
-rw-r--r--fs/sdcardfs/derived_perm.c477
-rw-r--r--fs/sdcardfs/file.c356
-rw-r--r--fs/sdcardfs/inode.c928
-rw-r--r--fs/sdcardfs/lookup.c403
-rw-r--r--fs/sdcardfs/main.c477
-rw-r--r--fs/sdcardfs/mmap.c81
-rw-r--r--fs/sdcardfs/multiuser.h49
-rw-r--r--fs/sdcardfs/packagelist.c879
-rw-r--r--fs/sdcardfs/sdcardfs.h621
-rw-r--r--fs/sdcardfs/super.c275
-rw-r--r--fs/select.c8
-rw-r--r--fs/super.c30
-rw-r--r--fs/userfaultfd.c9
-rw-r--r--fs/utimes.c2
-rw-r--r--include/asm-generic/vmlinux.lds.h10
-rw-r--r--include/linux/Kbuild2
-rw-r--r--include/linux/amba/mmci.h10
-rw-r--r--include/linux/android_aid.h28
-rw-r--r--include/linux/blkdev.h76
-rw-r--r--include/linux/cgroup_subsys.h4
-rw-r--r--include/linux/cpu.h7
-rw-r--r--include/linux/cpufreq.h19
-rw-r--r--include/linux/cpuidle.h2
-rw-r--r--include/linux/dcache.h1
-rw-r--r--include/linux/device-mapper.h6
-rw-r--r--include/linux/fence.h2
-rw-r--r--include/linux/freezer.h2
-rw-r--r--include/linux/fs.h22
-rw-r--r--include/linux/gpio_event.h170
-rw-r--r--include/linux/hrtimer.h12
-rw-r--r--include/linux/if_pppolac.h23
-rw-r--r--include/linux/if_pppopns.h23
-rw-r--r--include/linux/if_pppox.h21
-rw-r--r--include/linux/inet_diag.h11
-rw-r--r--include/linux/initramfs.h32
-rw-r--r--include/linux/ipv6.h1
-rw-r--r--include/linux/keychord.h23
-rw-r--r--include/linux/keycombo.h36
-rw-r--r--include/linux/keyreset.h29
-rw-r--r--include/linux/memblock.h8
-rw-r--r--include/linux/memory-state-time.h42
-rw-r--r--include/linux/mm.h14
-rw-r--r--include/linux/mm_types.h24
-rw-r--r--include/linux/mmc/core.h4
-rw-r--r--include/linux/mmc/host.h23
-rw-r--r--include/linux/mmc/pm.h1
-rw-r--r--include/linux/mmc/sdio_func.h10
-rw-r--r--include/linux/mount.h1
-rw-r--r--include/linux/namei.h3
-rw-r--r--include/linux/netfilter/xt_qtaguid.h13
-rw-r--r--include/linux/netfilter/xt_quota2.h25
-rw-r--r--include/linux/nmi.h5
-rw-r--r--include/linux/of_fdt.h21
-rw-r--r--include/linux/percpu-rwsem.h84
-rw-r--r--include/linux/perf_event.h5
-rw-r--r--include/linux/platform_data/ds2482.h21
-rw-r--r--include/linux/pm.h1
-rw-r--r--include/linux/poll.h2
-rw-r--r--include/linux/power_supply.h8
-rw-r--r--include/linux/pstore.h11
-rw-r--r--include/linux/pstore_ram.h9
-rw-r--r--include/linux/random.h1
-rw-r--r--include/linux/rcu_sync.h1
-rw-r--r--include/linux/sched.h90
-rw-r--r--include/linux/sched/sysctl.h26
-rw-r--r--include/linux/sched_energy.h44
-rw-r--r--include/linux/serial_core.h1
-rw-r--r--include/linux/sock_diag.h2
-rw-r--r--include/linux/suspend.h1
-rw-r--r--include/linux/thread_info.h4
-rw-r--r--include/linux/timekeeping.h1
-rw-r--r--include/linux/usb/class-dual-role.h129
-rw-r--r--include/linux/usb/composite.h1
-rw-r--r--include/linux/usb/f_accessory.h23
-rw-r--r--include/linux/usb/f_mtp.h23
-rw-r--r--include/linux/vmstat.h2
-rw-r--r--include/linux/wakelock.h67
-rw-r--r--include/linux/wakeup_reason.h32
-rw-r--r--include/linux/wlan_plat.h30
-rw-r--r--include/net/addrconf.h2
-rw-r--r--include/net/fib_rules.h9
-rw-r--r--include/net/flow.h9
-rw-r--r--include/net/ip.h1
-rw-r--r--include/net/ip6_route.h5
-rw-r--r--include/net/route.h5
-rw-r--r--include/net/sock.h8
-rw-r--r--include/net/tcp.h3
-rw-r--r--include/net/udp.h1
-rw-r--r--include/trace/events/android_fs.h31
-rw-r--r--include/trace/events/android_fs_template.h79
-rw-r--r--include/trace/events/cpufreq_interactive.h112
-rw-r--r--include/trace/events/cpufreq_sched.h87
-rw-r--r--include/trace/events/gpu.h143
-rw-r--r--include/trace/events/mmc.h91
-rw-r--r--include/trace/events/net.h8
-rw-r--r--include/trace/events/power.h51
-rw-r--r--include/trace/events/sched.h549
-rw-r--r--include/uapi/linux/android/binder.h104
-rw-r--r--include/uapi/linux/fib_rules.h8
-rw-r--r--include/uapi/linux/fs.h2
-rw-r--r--include/uapi/linux/fuse.h1
-rw-r--r--include/uapi/linux/if_pppolac.h33
-rw-r--r--include/uapi/linux/if_pppopns.h32
-rw-r--r--include/uapi/linux/if_pppox.h6
-rw-r--r--include/uapi/linux/inet_diag.h13
-rw-r--r--include/uapi/linux/ipv6.h1
-rw-r--r--include/uapi/linux/keychord.h52
-rw-r--r--include/uapi/linux/magic.h2
-rw-r--r--include/uapi/linux/netfilter/xt_IDLETIMER.h8
-rw-r--r--include/uapi/linux/netfilter/xt_socket.h7
-rw-r--r--include/uapi/linux/prctl.h9
-rw-r--r--include/uapi/linux/rtnetlink.h3
-rw-r--r--include/uapi/linux/sock_diag.h1
-rw-r--r--include/uapi/linux/usb/f_accessory.h146
-rw-r--r--include/uapi/linux/usb/f_mtp.h61
-rw-r--r--include/uapi/video/adf.h321
-rw-r--r--include/video/adf.h502
-rw-r--r--include/video/adf_client.h61
-rw-r--r--include/video/adf_fbdev.h124
-rw-r--r--include/video/adf_format.h26
-rw-r--r--include/video/adf_memblock.h20
-rw-r--r--init/Kconfig64
-rw-r--r--init/Makefile4
-rw-r--r--init/do_mounts.c1
-rw-r--r--init/do_mounts.h10
-rw-r--r--init/do_mounts_dm.c426
-rw-r--r--init/initramfs.c19
-rw-r--r--init/noinitramfs.c9
-rw-r--r--ipc/mqueue.c10
-rw-r--r--kernel/audit.c8
-rw-r--r--kernel/auditsc.c12
-rw-r--r--kernel/cgroup.c9
-rw-r--r--kernel/cpu.c42
-rw-r--r--kernel/cpuset.c33
-rw-r--r--kernel/debug/kdb/kdb_io.c12
-rw-r--r--kernel/events/core.c8
-rw-r--r--kernel/exit.c5
-rw-r--r--kernel/fork.c3
-rw-r--r--kernel/locking/percpu-rwsem.c229
-rw-r--r--kernel/power/Kconfig10
-rw-r--r--kernel/power/Makefile2
-rw-r--r--kernel/power/process.c22
-rw-r--r--kernel/power/suspend.c35
-rw-r--r--kernel/power/wakeup_reason.c225
-rw-r--r--kernel/printk/printk.c8
-rw-r--r--kernel/rcu/sync.c13
-rw-r--r--kernel/sched/Makefile5
-rw-r--r--kernel/sched/core.c359
-rw-r--r--kernel/sched/cpufreq_sched.c499
-rw-r--r--kernel/sched/cputime.c16
-rw-r--r--kernel/sched/deadline.c33
-rw-r--r--kernel/sched/energy.c124
-rw-r--r--kernel/sched/fair.c1329
-rw-r--r--kernel/sched/features.h9
-rw-r--r--kernel/sched/idle.c4
-rw-r--r--kernel/sched/rt.c106
-rw-r--r--kernel/sched/sched.h265
-rw-r--r--kernel/sched/stop_task.c3
-rw-r--r--kernel/sched/tune.c945
-rw-r--r--kernel/sched/tune.h55
-rw-r--r--kernel/sched/walt.c1125
-rw-r--r--kernel/sched/walt.h62
-rw-r--r--kernel/sys.c178
-rw-r--r--kernel/sysctl.c104
-rw-r--r--kernel/time/hrtimer.c8
-rw-r--r--kernel/time/timekeeping.c29
-rw-r--r--kernel/time/timer.c4
-rw-r--r--kernel/trace/Kconfig3
-rw-r--r--kernel/trace/Makefile1
-rw-r--r--kernel/trace/gpu-traces.c23
-rw-r--r--kernel/trace/trace.c99
-rw-r--r--kernel/trace/trace.h4
-rw-r--r--kernel/trace/trace_functions_graph.c43
-rw-r--r--kernel/trace/trace_output.c184
-rw-r--r--kernel/watchdog.c125
-rw-r--r--lib/Kconfig.debug23
-rw-r--r--lib/strncpy_from_user.c2
-rw-r--r--mm/madvise.c2
-rw-r--r--mm/memblock.c28
-rw-r--r--mm/memcontrol.c1
-rw-r--r--mm/mempolicy.c3
-rw-r--r--mm/mlock.c2
-rw-r--r--mm/mmap.c52
-rw-r--r--mm/mprotect.c2
-rw-r--r--mm/page_alloc.c32
-rw-r--r--mm/shmem.c13
-rw-r--r--mm/usercopy.c3
-rw-r--r--mm/vmstat.c69
-rw-r--r--net/Kconfig6
-rw-r--r--net/bluetooth/af_bluetooth.c29
-rw-r--r--net/bridge/br_device.c11
-rw-r--r--net/core/fib_rules.c72
-rw-r--r--net/core/sock.c5
-rw-r--r--net/core/sock_diag.c23
-rw-r--r--net/ipv4/Kconfig13
-rw-r--r--net/ipv4/Makefile1
-rw-r--r--net/ipv4/af_inet.c19
-rw-r--r--net/ipv4/fib_frontend.c1
-rw-r--r--net/ipv4/icmp.c2
-rw-r--r--net/ipv4/inet_connection_sock.c4
-rw-r--r--net/ipv4/inet_diag.c213
-rw-r--r--net/ipv4/ip_output.c3
-rw-r--r--net/ipv4/ping.c3
-rw-r--r--net/ipv4/raw.c2
-rw-r--r--net/ipv4/route.c38
-rw-r--r--net/ipv4/syncookies.c2
-rw-r--r--net/ipv4/sysctl_net_ipv4.c22
-rw-r--r--net/ipv4/sysfs_net_ipv4.c88
-rw-r--r--net/ipv4/tcp.c46
-rw-r--r--net/ipv4/tcp_diag.c19
-rw-r--r--net/ipv4/tcp_input.c1
-rw-r--r--net/ipv4/tcp_ipv4.c10
-rw-r--r--net/ipv4/tcp_output.c2
-rw-r--r--net/ipv4/udp.c18
-rw-r--r--net/ipv4/udp_diag.c89
-rw-r--r--net/ipv6/addrconf.c39
-rw-r--r--net/ipv6/af_inet6.c21
-rw-r--r--net/ipv6/ah6.c5
-rw-r--r--net/ipv6/datagram.c1
-rw-r--r--net/ipv6/esp6.c5
-rw-r--r--net/ipv6/exthdrs_core.c13
-rw-r--r--net/ipv6/icmp.c9
-rw-r--r--net/ipv6/inet6_connection_sock.c2
-rw-r--r--net/ipv6/ip6_gre.c4
-rw-r--r--net/ipv6/ip6_tunnel.c3
-rw-r--r--net/ipv6/ip6_vti.c5
-rw-r--r--net/ipv6/ipcomp6.c5
-rw-r--r--net/ipv6/netfilter.c1
-rw-r--r--net/ipv6/ping.c39
-rw-r--r--net/ipv6/raw.c1
-rw-r--r--net/ipv6/route.c92
-rw-r--r--net/ipv6/syncookies.c1
-rw-r--r--net/ipv6/tcp_ipv6.c3
-rw-r--r--net/ipv6/udp.c2
-rw-r--r--net/l2tp/l2tp_ip6.c1
-rw-r--r--net/mac80211/mesh_hwmp.c2
-rw-r--r--net/netfilter/Kconfig41
-rw-r--r--net/netfilter/Makefile2
-rw-r--r--net/netfilter/nfnetlink.c10
-rw-r--r--net/netfilter/xt_IDLETIMER.c243
-rw-r--r--net/netfilter/xt_qtaguid.c3032
-rw-r--r--net/netfilter/xt_qtaguid_internal.h352
-rw-r--r--net/netfilter/xt_qtaguid_print.c566
-rw-r--r--net/netfilter/xt_qtaguid_print.h120
-rw-r--r--net/netfilter/xt_quota2.c401
-rw-r--r--net/netfilter/xt_socket.c31
-rw-r--r--net/rfkill/Kconfig5
-rw-r--r--net/rfkill/core.c4
-rw-r--r--net/socket.c14
-rw-r--r--net/wireless/scan.c2
-rw-r--r--scripts/Makefile.clean2
-rw-r--r--scripts/Makefile.lib6
-rw-r--r--scripts/Makefile.modinst2
-rw-r--r--security/Kconfig10
-rw-r--r--security/commoncap.c11
-rw-r--r--security/inode.c2
-rw-r--r--security/lsm_audit.c4
-rw-r--r--security/security.c1
-rw-r--r--security/selinux/hooks.c34
-rw-r--r--security/selinux/include/classmap.h2
-rw-r--r--security/selinux/ss/avtab.c69
-rw-r--r--tools/perf/util/evsel.c15
575 files changed, 52957 insertions, 2367 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-dual-role-usb b/Documentation/ABI/testing/sysfs-class-dual-role-usb
new file mode 100644
index 000000000000..a900fd75430c
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-dual-role-usb
@@ -0,0 +1,71 @@
+What: /sys/class/dual_role_usb/.../
+Date: June 2015
+Contact: Badhri Jagan Sridharan<badhri@google.com>
+Description:
+ Provide a generic interface to monitor and change
+ the state of dual role usb ports. The name here
+ refers to the name mentioned in the
+ dual_role_phy_desc that is passed while registering
+ the dual_role_phy_intstance through
+ devm_dual_role_instance_register.
+
+What: /sys/class/dual_role_usb/.../supported_modes
+Date: June 2015
+Contact: Badhri Jagan Sridharan<badhri@google.com>
+Description:
+ This is a static node, once initialized this
+ is not expected to change during runtime. "dfp"
+ refers to "downstream facing port" i.e. port can
+ only act as host. "ufp" refers to "upstream
+ facing port" i.e. port can only act as device.
+ "dfp ufp" refers to "dual role port" i.e. the port
+ can either be a host port or a device port.
+
+What: /sys/class/dual_role_usb/.../mode
+Date: June 2015
+Contact: Badhri Jagan Sridharan<badhri@google.com>
+Description:
+ The mode node refers to the current mode in which the
+ port is operating. "dfp" for host ports. "ufp" for device
+ ports and "none" when cable is not connected.
+
+ On devices where the USB mode is software-controllable,
+ userspace can change the mode by writing "dfp" or "ufp".
+ On devices where the USB mode is fixed in hardware,
+ this attribute is read-only.
+
+What: /sys/class/dual_role_usb/.../power_role
+Date: June 2015
+Contact: Badhri Jagan Sridharan<badhri@google.com>
+Description:
+ The power_role node mentions whether the port
+ is "sink"ing or "source"ing power. "none" if
+ they are not connected.
+
+ On devices implementing USB Power Delivery,
+ userspace can control the power role by writing "sink" or
+ "source". On devices without USB-PD, this attribute is
+ read-only.
+
+What: /sys/class/dual_role_usb/.../data_role
+Date: June 2015
+Contact: Badhri Jagan Sridharan<badhri@google.com>
+Description:
+ The data_role node mentions whether the port
+ is acting as "host" or "device" for USB data connection.
+ "none" if there is no active data link.
+
+ On devices implementing USB Power Delivery, userspace
+ can control the data role by writing "host" or "device".
+ On devices without USB-PD, this attribute is read-only
+
+What: /sys/class/dual_role_usb/.../powers_vconn
+Date: June 2015
+Contact: Badhri Jagan Sridharan<badhri@google.com>
+Description:
+ The powers_vconn node mentions whether the port
+ is supplying power for VCONN pin.
+
+ On devices with software control of VCONN,
+ userspace can disable the power supply to VCONN by writing "n",
+ or enable the power supply by writing "y".
diff --git a/Documentation/ABI/testing/sysfs-kernel-wakeup_reasons b/Documentation/ABI/testing/sysfs-kernel-wakeup_reasons
new file mode 100644
index 000000000000..acb19b91c192
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-kernel-wakeup_reasons
@@ -0,0 +1,16 @@
+What: /sys/kernel/wakeup_reasons/last_resume_reason
+Date: February 2014
+Contact: Ruchi Kandoi <kandoiruchi@google.com>
+Description:
+ The /sys/kernel/wakeup_reasons/last_resume_reason is
+ used to report wakeup reasons after system exited suspend.
+
+What: /sys/kernel/wakeup_reasons/last_suspend_time
+Date: March 2015
+Contact: jinqian <jinqian@google.com>
+Description:
+ The /sys/kernel/wakeup_reasons/last_suspend_time is
+ used to report time spent in last suspend cycle. It contains
+ two numbers (in seconds) separated by space. First number is
+ the time spent in suspend and resume processes. Second number
+ is the time spent in sleep state. \ No newline at end of file
diff --git a/Documentation/android.txt b/Documentation/android.txt
new file mode 100644
index 000000000000..0f40a78b045f
--- /dev/null
+++ b/Documentation/android.txt
@@ -0,0 +1,121 @@
+ =============
+ A N D R O I D
+ =============
+
+Copyright (C) 2009 Google, Inc.
+Written by Mike Chan <mike@android.com>
+
+CONTENTS:
+---------
+
+1. Android
+ 1.1 Required enabled config options
+ 1.2 Required disabled config options
+ 1.3 Recommended enabled config options
+2. Contact
+
+
+1. Android
+==========
+
+Android (www.android.com) is an open source operating system for mobile devices.
+This document describes configurations needed to run the Android framework on
+top of the Linux kernel.
+
+To see a working defconfig look at msm_defconfig or goldfish_defconfig
+which can be found at http://android.git.kernel.org in kernel/common.git
+and kernel/msm.git
+
+
+1.1 Required enabled config options
+-----------------------------------
+After building a standard defconfig, ensure that these options are enabled in
+your .config or defconfig if they are not already. Based off the msm_defconfig.
+You should keep the rest of the default options enabled in the defconfig
+unless you know what you are doing.
+
+ANDROID_PARANOID_NETWORK
+ASHMEM
+CONFIG_FB_MODE_HELPERS
+CONFIG_FONT_8x16
+CONFIG_FONT_8x8
+CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+DAB
+EARLYSUSPEND
+FB
+FB_CFB_COPYAREA
+FB_CFB_FILLRECT
+FB_CFB_IMAGEBLIT
+FB_DEFERRED_IO
+FB_TILEBLITTING
+HIGH_RES_TIMERS
+INOTIFY
+INOTIFY_USER
+INPUT_EVDEV
+INPUT_GPIO
+INPUT_MISC
+LEDS_CLASS
+LEDS_GPIO
+LOCK_KERNEL
+LkOGGER
+LOW_MEMORY_KILLER
+MISC_DEVICES
+NEW_LEDS
+NO_HZ
+POWER_SUPPLY
+PREEMPT
+RAMFS
+RTC_CLASS
+RTC_LIB
+SWITCH
+SWITCH_GPIO
+TMPFS
+UID_STAT
+UID16
+USB_FUNCTION
+USB_FUNCTION_ADB
+USER_WAKELOCK
+VIDEO_OUTPUT_CONTROL
+WAKELOCK
+YAFFS_AUTO_YAFFS2
+YAFFS_FS
+YAFFS_YAFFS1
+YAFFS_YAFFS2
+
+
+1.2 Required disabled config options
+------------------------------------
+CONFIG_YAFFS_DISABLE_LAZY_LOAD
+DNOTIFY
+
+
+1.3 Recommended enabled config options
+------------------------------
+ANDROID_PMEM
+PSTORE_CONSOLE
+PSTORE_RAM
+SCHEDSTATS
+DEBUG_PREEMPT
+DEBUG_MUTEXES
+DEBUG_SPINLOCK_SLEEP
+DEBUG_INFO
+FRAME_POINTER
+CPU_FREQ
+CPU_FREQ_TABLE
+CPU_FREQ_DEFAULT_GOV_ONDEMAND
+CPU_FREQ_GOV_ONDEMAND
+CRC_CCITT
+EMBEDDED
+INPUT_TOUCHSCREEN
+I2C
+I2C_BOARDINFO
+LOG_BUF_SHIFT=17
+SERIAL_CORE
+SERIAL_CORE_CONSOLE
+
+
+2. Contact
+==========
+website: http://android.git.kernel.org
+
+mailing-lists: android-kernel@googlegroups.com
diff --git a/Documentation/block/00-INDEX b/Documentation/block/00-INDEX
index e840b47613f7..bc5148757edb 100644
--- a/Documentation/block/00-INDEX
+++ b/Documentation/block/00-INDEX
@@ -26,3 +26,9 @@ switching-sched.txt
- Switching I/O schedulers at runtime
writeback_cache_control.txt
- Control of volatile write back caches
+mmc-max-speed.txt
+ - eMMC layer speed simulation, related to /sys/block/mmcblk*/
+ attributes:
+ max_read_speed
+ max_write_speed
+ cache_size
diff --git a/Documentation/block/mmc-max-speed.txt b/Documentation/block/mmc-max-speed.txt
new file mode 100644
index 000000000000..3f052b9fb999
--- /dev/null
+++ b/Documentation/block/mmc-max-speed.txt
@@ -0,0 +1,38 @@
+eMMC Block layer simulation speed controls in /sys/block/mmcblk*/
+===============================================
+
+Turned on with CONFIG_MMC_SIMULATE_MAX_SPEED which enables MMC device speed
+limiting. Used to test and simulate the behavior of the system when
+confronted with a slow MMC.
+
+Enables max_read_speed, max_write_speed and cache_size attributes and module
+default parameters to control the write or read maximum KB/second speed
+behaviors.
+
+NB: There is room for improving the algorithm for aspects tied directly to
+eMMC specific behavior. For instance, wear leveling and stalls from an
+exhausted erase pool. We would expect that if there was a need to provide
+similar speed simulation controls to other types of block devices, aspects of
+their behavior are modelled separately (e.g. head seek times, heat assist,
+shingling and rotational latency).
+
+/sys/block/mmcblk0/max_read_speed:
+
+Number of KB/second reads allowed to the block device. Used to test and
+simulate the behavior of the system when confronted with a slow reading MMC.
+Set to 0 or "off" to place no speed limit.
+
+/sys/block/mmcblk0/max_write_speed:
+
+Number of KB/second writes allowed to the block device. Used to test and
+simulate the behavior of the system when confronted with a slow writing MMC.
+Set to 0 or "off" to place no speed limit.
+
+/sys/block/mmcblk0/cache_size:
+
+Number of MB of high speed memory or high speed SLC cache expected on the
+eMMC device being simulated. Used to help simulate the write-back behavior
+more accurately. The assumption is the cache has no delay, but draws down
+in the background to the MLC/TLC primary store at the max_write_speed rate.
+Any write speed delays will show up when the cache is full, or when an I/O
+request to flush is issued.
diff --git a/Documentation/cpu-freq/governors.txt b/Documentation/cpu-freq/governors.txt
index c15aa75f5227..ac8a37e0c76a 100644
--- a/Documentation/cpu-freq/governors.txt
+++ b/Documentation/cpu-freq/governors.txt
@@ -28,6 +28,7 @@ Contents:
2.3 Userspace
2.4 Ondemand
2.5 Conservative
+2.6 Interactive
3. The Governor Interface in the CPUfreq Core
@@ -218,6 +219,90 @@ a decision on when to decrease the frequency while running in any
speed. Load for frequency increase is still evaluated every
sampling rate.
+2.6 Interactive
+---------------
+
+The CPUfreq governor "interactive" is designed for latency-sensitive,
+interactive workloads. This governor sets the CPU speed depending on
+usage, similar to "ondemand" and "conservative" governors, but with a
+different set of configurable behaviors.
+
+The tuneable values for this governor are:
+
+target_loads: CPU load values used to adjust speed to influence the
+current CPU load toward that value. In general, the lower the target
+load, the more often the governor will raise CPU speeds to bring load
+below the target. The format is a single target load, optionally
+followed by pairs of CPU speeds and CPU loads to target at or above
+those speeds. Colons can be used between the speeds and associated
+target loads for readability. For example:
+
+ 85 1000000:90 1700000:99
+
+targets CPU load 85% below speed 1GHz, 90% at or above 1GHz, until
+1.7GHz and above, at which load 99% is targeted. If speeds are
+specified these must appear in ascending order. Higher target load
+values are typically specified for higher speeds, that is, target load
+values also usually appear in an ascending order. The default is
+target load 90% for all speeds.
+
+min_sample_time: The minimum amount of time to spend at the current
+frequency before ramping down. Default is 80000 uS.
+
+hispeed_freq: An intermediate "hi speed" at which to initially ramp
+when CPU load hits the value specified in go_hispeed_load. If load
+stays high for the amount of time specified in above_hispeed_delay,
+then speed may be bumped higher. Default is the maximum speed
+allowed by the policy at governor initialization time.
+
+go_hispeed_load: The CPU load at which to ramp to hispeed_freq.
+Default is 99%.
+
+above_hispeed_delay: When speed is at or above hispeed_freq, wait for
+this long before raising speed in response to continued high load.
+The format is a single delay value, optionally followed by pairs of
+CPU speeds and the delay to use at or above those speeds. Colons can
+be used between the speeds and associated delays for readability. For
+example:
+
+ 80000 1300000:200000 1500000:40000
+
+uses delay 80000 uS until CPU speed 1.3 GHz, at which speed delay
+200000 uS is used until speed 1.5 GHz, at which speed (and above)
+delay 40000 uS is used. If speeds are specified these must appear in
+ascending order. Default is 20000 uS.
+
+timer_rate: Sample rate for reevaluating CPU load when the CPU is not
+idle. A deferrable timer is used, such that the CPU will not be woken
+from idle to service this timer until something else needs to run.
+(The maximum time to allow deferring this timer when not running at
+minimum speed is configurable via timer_slack.) Default is 20000 uS.
+
+timer_slack: Maximum additional time to defer handling the governor
+sampling timer beyond timer_rate when running at speeds above the
+minimum. For platforms that consume additional power at idle when
+CPUs are running at speeds greater than minimum, this places an upper
+bound on how long the timer will be deferred prior to re-evaluating
+load and dropping speed. For example, if timer_rate is 20000uS and
+timer_slack is 10000uS then timers will be deferred for up to 30msec
+when not at lowest speed. A value of -1 means defer timers
+indefinitely at all speeds. Default is 80000 uS.
+
+boost: If non-zero, immediately boost speed of all CPUs to at least
+hispeed_freq until zero is written to this attribute. If zero, allow
+CPU speeds to drop below hispeed_freq according to load as usual.
+Default is zero.
+
+boostpulse: On each write, immediately boost speed of all CPUs to
+hispeed_freq for at least the period of time specified by
+boostpulse_duration, after which speeds are allowed to drop below
+hispeed_freq according to load as usual.
+
+boostpulse_duration: Length of time to hold CPU speed at hispeed_freq
+on a write to boostpulse, before allowing speed to drop according to
+load as usual. Default is 80000 uS.
+
+
3. The Governor Interface in the CPUfreq Core
=============================================
diff --git a/Documentation/device-mapper/boot.txt b/Documentation/device-mapper/boot.txt
new file mode 100644
index 000000000000..adcaad5e5e32
--- /dev/null
+++ b/Documentation/device-mapper/boot.txt
@@ -0,0 +1,42 @@
+Boot time creation of mapped devices
+===================================
+
+It is possible to configure a device mapper device to act as the root
+device for your system in two ways.
+
+The first is to build an initial ramdisk which boots to a minimal
+userspace which configures the device, then pivot_root(8) in to it.
+
+For simple device mapper configurations, it is possible to boot directly
+using the following kernel command line:
+
+dm="<name> <uuid> <ro>,table line 1,...,table line n"
+
+name = the name to associate with the device
+ after boot, udev, if used, will use that name to label
+ the device node.
+uuid = may be 'none' or the UUID desired for the device.
+ro = may be "ro" or "rw". If "ro", the device and device table will be
+ marked read-only.
+
+Each table line may be as normal when using the dmsetup tool except for
+two variations:
+1. Any use of commas will be interpreted as a newline
+2. Quotation marks cannot be escaped and cannot be used without
+ terminating the dm= argument.
+
+Unless renamed by udev, the device node created will be dm-0 as the
+first minor number for the device-mapper is used during early creation.
+
+Example
+=======
+
+- Booting to a linear array made up of user-mode linux block devices:
+
+ dm="lroot none 0, 0 4096 linear 98:16 0, 4096 4096 linear 98:32 0" \
+ root=/dev/dm-0
+
+Will boot to a rw dm-linear target of 8192 sectors split across two
+block devices identified by their major:minor numbers. After boot, udev
+will rename this target to /dev/mapper/lroot (depending on the rules).
+No uuid was assigned.
diff --git a/Documentation/device-mapper/verity.txt b/Documentation/device-mapper/verity.txt
index e15bc1a0fb98..89fd8f9a259f 100644
--- a/Documentation/device-mapper/verity.txt
+++ b/Documentation/device-mapper/verity.txt
@@ -18,11 +18,11 @@ Construction Parameters
0 is the original format used in the Chromium OS.
The salt is appended when hashing, digests are stored continuously and
- the rest of the block is padded with zeros.
+ the rest of the block is padded with zeroes.
1 is the current format that should be used for new devices.
The salt is prepended when hashing and each digest is
- padded with zeros to the power of two.
+ padded with zeroes to the power of two.
<dev>
This is the device containing data, the integrity of which needs to be
@@ -79,6 +79,37 @@ restart_on_corruption
not compatible with ignore_corruption and requires user space support to
avoid restart loops.
+ignore_zero_blocks
+ Do not verify blocks that are expected to contain zeroes and always return
+ zeroes instead. This may be useful if the partition contains unused blocks
+ that are not guaranteed to contain zeroes.
+
+use_fec_from_device <fec_dev>
+ Use forward error correction (FEC) to recover from corruption if hash
+ verification fails. Use encoding data from the specified device. This
+ may be the same device where data and hash blocks reside, in which case
+ fec_start must be outside data and hash areas.
+
+ If the encoding data covers additional metadata, it must be accessible
+ on the hash device after the hash blocks.
+
+ Note: block sizes for data and hash devices must match. Also, if the
+ verity <dev> is encrypted the <fec_dev> should be too.
+
+fec_roots <num>
+ Number of generator roots. This equals to the number of parity bytes in
+ the encoding data. For example, in RS(M, N) encoding, the number of roots
+ is M-N.
+
+fec_blocks <num>
+ The number of encoding data blocks on the FEC device. The block size for
+ the FEC device is <data_block_size>.
+
+fec_start <offset>
+ This is the offset, in <data_block_size> blocks, from the start of the
+ FEC device to the beginning of the encoding data.
+
+
Theory of operation
===================
@@ -98,6 +129,11 @@ per-block basis. This allows for a lightweight hash computation on first read
into the page cache. Block hashes are stored linearly, aligned to the nearest
block size.
+If forward error correction (FEC) support is enabled any recovery of
+corrupted data will be verified using the cryptographic hash of the
+corresponding data. This is why combining error correction with
+integrity checking is essential.
+
Hash Tree
---------
diff --git a/Documentation/devicetree/bindings/goldfish/audio.txt b/Documentation/devicetree/bindings/goldfish/audio.txt
new file mode 100644
index 000000000000..d043fda433ba
--- /dev/null
+++ b/Documentation/devicetree/bindings/goldfish/audio.txt
@@ -0,0 +1,17 @@
+Android Goldfish Audio
+
+Android goldfish audio device generated by android emulator.
+
+Required properties:
+
+- compatible : should contain "google,goldfish-audio" to match emulator
+- reg : <registers mapping>
+- interrupts : <interrupt mapping>
+
+Example:
+
+ goldfish_audio@9030000 {
+ compatible = "google,goldfish-audio";
+ reg = <0x9030000 0x100>;
+ interrupts = <0x4>;
+ };
diff --git a/Documentation/devicetree/bindings/goldfish/battery.txt b/Documentation/devicetree/bindings/goldfish/battery.txt
new file mode 100644
index 000000000000..4fb613933214
--- /dev/null
+++ b/Documentation/devicetree/bindings/goldfish/battery.txt
@@ -0,0 +1,17 @@
+Android Goldfish Battery
+
+Android goldfish battery device generated by android emulator.
+
+Required properties:
+
+- compatible : should contain "google,goldfish-battery" to match emulator
+- reg : <registers mapping>
+- interrupts : <interrupt mapping>
+
+Example:
+
+ goldfish_battery@9020000 {
+ compatible = "google,goldfish-battery";
+ reg = <0x9020000 0x1000>;
+ interrupts = <0x3>;
+ };
diff --git a/Documentation/devicetree/bindings/goldfish/events.txt b/Documentation/devicetree/bindings/goldfish/events.txt
new file mode 100644
index 000000000000..5babf46317a4
--- /dev/null
+++ b/Documentation/devicetree/bindings/goldfish/events.txt
@@ -0,0 +1,17 @@
+Android Goldfish Events Keypad
+
+Android goldfish events keypad device generated by android emulator.
+
+Required properties:
+
+- compatible : should contain "google,goldfish-events-keypad" to match emulator
+- reg : <registers mapping>
+- interrupts : <interrupt mapping>
+
+Example:
+
+ goldfish-events@9040000 {
+ compatible = "google,goldfish-events-keypad";
+ reg = <0x9040000 0x1000>;
+ interrupts = <0x5>;
+ };
diff --git a/Documentation/devicetree/bindings/goldfish/tty.txt b/Documentation/devicetree/bindings/goldfish/tty.txt
new file mode 100644
index 000000000000..82648278da77
--- /dev/null
+++ b/Documentation/devicetree/bindings/goldfish/tty.txt
@@ -0,0 +1,17 @@
+Android Goldfish TTY
+
+Android goldfish tty device generated by android emulator.
+
+Required properties:
+
+- compatible : should contain "google,goldfish-tty" to match emulator
+- reg : <registers mapping>
+- interrupts : <interrupt mapping>
+
+Example:
+
+ goldfish_tty@1f004000 {
+ compatible = "google,goldfish-tty";
+ reg = <0x1f004000 0x1000>;
+ interrupts = <0xc>;
+ };
diff --git a/Documentation/devicetree/bindings/misc/memory-state-time.txt b/Documentation/devicetree/bindings/misc/memory-state-time.txt
new file mode 100644
index 000000000000..c99a506c030d
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/memory-state-time.txt
@@ -0,0 +1,8 @@
+Memory bandwidth and frequency state tracking
+
+Required properties:
+- compatible : should be:
+ "memory-state-time"
+- freq-tbl: Should contain entries with each frequency in Hz.
+- bw-buckets: Should contain upper-bound limits for each bandwidth bucket in Mbps.
+ Must match the framework power_profile.xml for the device.
diff --git a/Documentation/devicetree/bindings/misc/ramoops.txt b/Documentation/devicetree/bindings/misc/ramoops.txt
new file mode 100644
index 000000000000..5a475fae4aab
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/ramoops.txt
@@ -0,0 +1,43 @@
+Ramoops oops/panic logger
+=========================
+
+ramoops provides persistent RAM storage for oops and panics, so they can be
+recovered after a reboot.
+
+Parts of this storage may be set aside for other persistent log buffers, such
+as kernel log messages, or for optional ECC error-correction data. The total
+size of these optional buffers must fit in the reserved region.
+
+Any remaining space will be used for a circular buffer of oops and panic
+records. These records have a configurable size, with a size of 0 indicating
+that they should be disabled.
+
+
+Required properties:
+
+- compatible: must be "ramoops"
+
+- memory-region: phandle to a region of memory that is preserved between reboots
+
+
+Optional properties:
+
+- ecc-size: enables ECC support and specifies ECC buffer size in bytes
+ (defaults to no ECC)
+
+- record-size: maximum size in bytes of each dump done on oops/panic
+ (defaults to 0)
+
+- console-size: size in bytes of log buffer reserved for kernel messages
+ (defaults to 0)
+
+- ftrace-size: size in bytes of log buffer reserved for function tracing and
+ profiling (defaults to 0)
+
+- pmsg-size: size in bytes of log buffer reserved for userspace messages
+ (defaults to 0)
+
+- unbuffered: if present, use unbuffered mappings to map the reserved region
+ (defaults to buffered mappings)
+
+- no-dump-oops: if present, only dump panics (defaults to panics and oops)
diff --git a/Documentation/devicetree/bindings/scheduler/sched-energy-costs.txt b/Documentation/devicetree/bindings/scheduler/sched-energy-costs.txt
new file mode 100644
index 000000000000..11216f09e596
--- /dev/null
+++ b/Documentation/devicetree/bindings/scheduler/sched-energy-costs.txt
@@ -0,0 +1,360 @@
+===========================================================
+Energy cost bindings for Energy Aware Scheduling
+===========================================================
+
+===========================================================
+1 - Introduction
+===========================================================
+
+This note specifies bindings required for energy-aware scheduling
+(EAS)[1]. Historically, the scheduler's primary objective has been
+performance. EAS aims to provide an alternative objective - energy
+efficiency. EAS relies on a simple platform energy cost model to
+guide scheduling decisions. The model only considers the CPU
+subsystem.
+
+This note is aligned with the definition of the layout of physical
+CPUs in the system as described in the ARM topology binding
+description [2]. The concept is applicable to any system so long as
+the cost model data is provided for those processing elements in
+that system's topology that EAS is required to service.
+
+Processing elements refer to hardware threads, CPUs and clusters of
+related CPUs in increasing order of hierarchy.
+
+EAS requires two key cost metrics - busy costs and idle costs. Busy
+costs comprise of a list of compute capacities for the processing
+element in question and the corresponding power consumption at that
+capacity. Idle costs comprise of a list of power consumption values
+for each idle state [C-state] that the processing element supports.
+For a detailed description of these metrics, their derivation and
+their use see [3].
+
+These cost metrics are required for processing elements in all
+scheduling domain levels that EAS is required to service.
+
+===========================================================
+2 - energy-costs node
+===========================================================
+
+Energy costs for the processing elements in scheduling domains that
+EAS is required to service are defined in the energy-costs node
+which acts as a container for the actual per processing element cost
+nodes. A single energy-costs node is required for a given system.
+
+- energy-costs node
+
+ Usage: Required
+
+ Description: The energy-costs node is a container node and
+ it's sub-nodes describe costs for each processing element at
+ all scheduling domain levels that EAS is required to
+ service.
+
+ Node name must be "energy-costs".
+
+ The energy-costs node's parent node must be the cpus node.
+
+ The energy-costs node's child nodes can be:
+
+ - one or more cost nodes.
+
+ Any other configuration is considered invalid.
+
+The energy-costs node can only contain a single type of child node
+whose bindings are described in paragraph 4.
+
+===========================================================
+3 - energy-costs node child nodes naming convention
+===========================================================
+
+energy-costs child nodes must follow a naming convention where the
+node name must be "thread-costN", "core-costN", "cluster-costN"
+depending on whether the costs in the node are for a thread, core or
+cluster. N (where N = {0, 1, ...}) is the node number and has no
+bearing to the OS' logical thread, core or cluster index.
+
+===========================================================
+4 - cost node bindings
+===========================================================
+
+Bindings for cost nodes are defined as follows:
+
+- cluster-cost node
+
+ Description: must be declared within an energy-costs node. A
+ system can contain multiple clusters and each cluster
+ serviced by EAS must have a corresponding cluster-costs
+ node.
+
+ The cluster-cost node name must be "cluster-costN" as
+ described in 3 above.
+
+ A cluster-cost node must be a leaf node with no children.
+
+ Properties for cluster-cost nodes are described in paragraph
+ 5 below.
+
+ Any other configuration is considered invalid.
+
+- core-cost node
+
+ Description: must be declared within an energy-costs node. A
+ system can contain multiple cores and each core serviced by
+ EAS must have a corresponding core-cost node.
+
+ The core-cost node name must be "core-costN" as described in
+ 3 above.
+
+ A core-cost node must be a leaf node with no children.
+
+ Properties for core-cost nodes are described in paragraph
+ 5 below.
+
+ Any other configuration is considered invalid.
+
+- thread-cost node
+
+ Description: must be declared within an energy-costs node. A
+ system can contain cores with multiple hardware threads and
+ each thread serviced by EAS must have a corresponding
+ thread-cost node.
+
+ The core-cost node name must be "core-costN" as described in
+ 3 above.
+
+ A core-cost node must be a leaf node with no children.
+
+ Properties for thread-cost nodes are described in paragraph
+ 5 below.
+
+ Any other configuration is considered invalid.
+
+===========================================================
+5 - Cost node properties
+==========================================================
+
+All cost node types must have only the following properties:
+
+- busy-cost-data
+
+ Usage: required
+ Value type: An array of 2-item tuples. Each item is of type
+ u32.
+ Definition: The first item in the tuple is the capacity
+ value as described in [3]. The second item in the tuple is
+ the energy cost value as described in [3].
+
+- idle-cost-data
+
+ Usage: required
+ Value type: An array of 1-item tuples. The item is of type
+ u32.
+ Definition: The item in the tuple is the energy cost value
+ as described in [3].
+
+===========================================================
+4 - Extensions to the cpu node
+===========================================================
+
+The cpu node is extended with a property that establishes the
+connection between the processing element represented by the cpu
+node and the cost-nodes associated with this processing element.
+
+The connection is expressed in line with the topological hierarchy
+that this processing element belongs to starting with the level in
+the hierarchy that this processing element itself belongs to through
+to the highest level that EAS is required to service. The
+connection cannot be sparse and must be contiguous from the
+processing element's level through to the highest desired level. The
+highest desired level must be the same for all processing elements.
+
+Example: Given that a cpu node may represent a thread that is a part
+of a core, this property may contain multiple elements which
+associate the thread with cost nodes describing the costs for the
+thread itself, the core the thread belongs to, the cluster the core
+belongs to and so on. The elements must be ordered from the lowest
+level nodes to the highest desired level that EAS must service. The
+highest desired level must be the same for all cpu nodes. The
+elements must not be sparse: there must be elements for the current
+thread, the next level of hierarchy (core) and so on without any
+'holes'.
+
+Example: Given that a cpu node may represent a core that is a part
+of a cluster of related cpus this property may contain multiple
+elements which associate the core with cost nodes describing the
+costs for the core itself, the cluster the core belongs to and so
+on. The elements must be ordered from the lowest level nodes to the
+highest desired level that EAS must service. The highest desired
+level must be the same for all cpu nodes. The elements must not be
+sparse: there must be elements for the current thread, the next
+level of hierarchy (core) and so on without any 'holes'.
+
+If the system comprises of hierarchical clusters of clusters, this
+property will contain multiple associations with the relevant number
+of cluster elements in hierarchical order.
+
+Property added to the cpu node:
+
+- sched-energy-costs
+
+ Usage: required
+ Value type: List of phandles
+ Definition: a list of phandles to specific cost nodes in the
+ energy-costs parent node that correspond to the processing
+ element represented by this cpu node in hierarchical order
+ of topology.
+
+ The order of phandles in the list is significant. The first
+ phandle is to the current processing element's own cost
+ node. Subsequent phandles are to higher hierarchical level
+ cost nodes up until the maximum level that EAS is to
+ service.
+
+ All cpu nodes must have the same highest level cost node.
+
+ The phandle list must not be sparsely populated with handles
+ to non-contiguous hierarchical levels. See commentary above
+ for clarity.
+
+ Any other configuration is invalid.
+
+===========================================================
+5 - Example dts
+===========================================================
+
+Example 1 (ARM 64-bit, 6-cpu system, two clusters of cpus, one
+cluster of 2 Cortex-A57 cpus, one cluster of 4 Cortex-A53 cpus):
+
+cpus {
+ #address-cells = <2>;
+ #size-cells = <0>;
+ .
+ .
+ .
+ A57_0: cpu@0 {
+ compatible = "arm,cortex-a57","arm,armv8";
+ reg = <0x0 0x0>;
+ device_type = "cpu";
+ enable-method = "psci";
+ next-level-cache = <&A57_L2>;
+ clocks = <&scpi_dvfs 0>;
+ cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
+ sched-energy-costs = <&CPU_COST_0 &CLUSTER_COST_0>;
+ };
+
+ A57_1: cpu@1 {
+ compatible = "arm,cortex-a57","arm,armv8";
+ reg = <0x0 0x1>;
+ device_type = "cpu";
+ enable-method = "psci";
+ next-level-cache = <&A57_L2>;
+ clocks = <&scpi_dvfs 0>;
+ cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
+ sched-energy-costs = <&CPU_COST_0 &CLUSTER_COST_0>;
+ };
+
+ A53_0: cpu@100 {
+ compatible = "arm,cortex-a53","arm,armv8";
+ reg = <0x0 0x100>;
+ device_type = "cpu";
+ enable-method = "psci";
+ next-level-cache = <&A53_L2>;
+ clocks = <&scpi_dvfs 1>;
+ cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
+ sched-energy-costs = <&CPU_COST_1 &CLUSTER_COST_1>;
+ };
+
+ A53_1: cpu@101 {
+ compatible = "arm,cortex-a53","arm,armv8";
+ reg = <0x0 0x101>;
+ device_type = "cpu";
+ enable-method = "psci";
+ next-level-cache = <&A53_L2>;
+ clocks = <&scpi_dvfs 1>;
+ cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
+ sched-energy-costs = <&CPU_COST_1 &CLUSTER_COST_1>;
+ };
+
+ A53_2: cpu@102 {
+ compatible = "arm,cortex-a53","arm,armv8";
+ reg = <0x0 0x102>;
+ device_type = "cpu";
+ enable-method = "psci";
+ next-level-cache = <&A53_L2>;
+ clocks = <&scpi_dvfs 1>;
+ cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
+ sched-energy-costs = <&CPU_COST_1 &CLUSTER_COST_1>;
+ };
+
+ A53_3: cpu@103 {
+ compatible = "arm,cortex-a53","arm,armv8";
+ reg = <0x0 0x103>;
+ device_type = "cpu";
+ enable-method = "psci";
+ next-level-cache = <&A53_L2>;
+ clocks = <&scpi_dvfs 1>;
+ cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
+ sched-energy-costs = <&CPU_COST_1 &CLUSTER_COST_1>;
+ };
+
+ energy-costs {
+ CPU_COST_0: core-cost0 {
+ busy-cost-data = <
+ 417 168
+ 579 251
+ 744 359
+ 883 479
+ 1024 616
+ >;
+ idle-cost-data = <
+ 15
+ 0
+ >;
+ };
+ CPU_COST_1: core-cost1 {
+ busy-cost-data = <
+ 235 33
+ 302 46
+ 368 61
+ 406 76
+ 447 93
+ >;
+ idle-cost-data = <
+ 6
+ 0
+ >;
+ };
+ CLUSTER_COST_0: cluster-cost0 {
+ busy-cost-data = <
+ 417 24
+ 579 32
+ 744 43
+ 883 49
+ 1024 64
+ >;
+ idle-cost-data = <
+ 65
+ 24
+ >;
+ };
+ CLUSTER_COST_1: cluster-cost1 {
+ busy-cost-data = <
+ 235 26
+ 303 30
+ 368 39
+ 406 47
+ 447 57
+ >;
+ idle-cost-data = <
+ 56
+ 17
+ >;
+ };
+ };
+};
+
+===============================================================================
+[1] https://lkml.org/lkml/2015/5/12/728
+[2] Documentation/devicetree/bindings/topology.txt
+[3] Documentation/scheduler/sched-energy.txt
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 6716413c17ba..fea4777a5695 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -43,6 +43,7 @@ Table of Contents
3.7 /proc/<pid>/task/<tid>/children - Information about task children
3.8 /proc/<pid>/fdinfo/<fd> - Information about opened file
3.9 /proc/<pid>/map_files - Information about memory mapped files
+ 3.10 /proc/<pid>/timerslack_ns - Task timerslack value
4 Configuring procfs
4.1 Mount options
@@ -380,6 +381,8 @@ is not associated with a file:
[stack] = the stack of the main process
[vdso] = the "virtual dynamic shared object",
the kernel system call handler
+ [anon:<name>] = an anonymous mapping that has been
+ named by userspace
or if empty, the mapping is anonymous.
@@ -432,6 +435,7 @@ KernelPageSize: 4 kB
MMUPageSize: 4 kB
Locked: 0 kB
VmFlags: rd ex mr mw me dw
+Name: name from userspace
the first of these lines shows the same information as is displayed for the
mapping in /proc/PID/maps. The remaining lines show the size of the mapping
@@ -494,6 +498,9 @@ Note that there is no guarantee that every flag and associated mnemonic will
be present in all further kernel releases. Things get changed, the flags may
be vanished or the reverse -- new added.
+The "Name" field will only be present on a mapping that has been named by
+userspace, and will show the name passed in by userspace.
+
This file is only present if the CONFIG_MMU kernel configuration option is
enabled.
@@ -1847,6 +1854,23 @@ time one can open(2) mappings from the listings of two processes and
comparing their inode numbers to figure out which anonymous memory areas
are actually shared.
+3.10 /proc/<pid>/timerslack_ns - Task timerslack value
+---------------------------------------------------------
+This file provides the value of the task's timerslack value in nanoseconds.
+This value specifies a amount of time that normal timers may be deferred
+in order to coalesce timers and avoid unnecessary wakeups.
+
+This allows a task's interactivity vs power consumption trade off to be
+adjusted.
+
+Writing 0 to the file will set the tasks timerslack to the default value.
+
+Valid values are from 0 - ULLONG_MAX
+
+An application setting the value must have PTRACE_MODE_ATTACH_FSCREDS level
+permissions on the task specified to change its timerslack_ns value.
+
+
------------------------------------------------------------------------------
Configuring procfs
------------------------------------------------------------------------------
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 5ee92cc9e578..583935f88ee8 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -56,6 +56,7 @@ parameter is applicable:
BLACKFIN Blackfin architecture is enabled.
CLK Common clock infrastructure is enabled.
CMA Contiguous Memory Area support is enabled.
+ DM Device mapper support is enabled.
DRM Direct Rendering Management support is enabled.
DYNAMIC_DEBUG Build in debug messages and enable them at runtime
EDD BIOS Enhanced Disk Drive Services (EDD) is enabled
@@ -915,6 +916,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
dis_ucode_ldr [X86] Disable the microcode loader.
+ dm= [DM] Allows early creation of a device-mapper device.
+ See Documentation/device-mapper/boot.txt.
+
+ dmasound= [HW,OSS] Sound subsystem buff
+
dma_debug=off If the kernel is compiled with DMA_API_DEBUG support,
this option disables the debugging code at boot.
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 2ea4c45cf1c8..2042261408b9 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -584,6 +584,16 @@ tcp_fastopen - INTEGER
See include/net/tcp.h and the code for more details.
+tcp_fwmark_accept - BOOLEAN
+ If set, incoming connections to listening sockets that do not have a
+ socket mark will set the mark of the accepting socket to the fwmark of
+ the incoming SYN packet. This will cause all packets on that connection
+ (starting from the first SYNACK) to be sent with that fwmark. The
+ listening socket's mark is unchanged. Listening sockets that already
+ have a fwmark set via setsockopt(SOL_SOCKET, SO_MARK, ...) are
+ unaffected.
+ Default: 0
+
tcp_syn_retries - INTEGER
Number of times initial SYNs for an active TCP connection attempt
will be retransmitted. Should not be higher than 255. Default value
diff --git a/Documentation/ramoops.txt b/Documentation/ramoops.txt
index 5d8675615e59..9264bcab4099 100644
--- a/Documentation/ramoops.txt
+++ b/Documentation/ramoops.txt
@@ -45,7 +45,7 @@ corrupt, but usually it is restorable.
2. Setting the parameters
-Setting the ramoops parameters can be done in 2 different manners:
+Setting the ramoops parameters can be done in 3 different manners:
1. Use the module parameters (which have the names of the variables described
as before).
For quick debugging, you can also reserve parts of memory during boot
@@ -54,7 +54,9 @@ Setting the ramoops parameters can be done in 2 different manners:
kernel to use only the first 128 MB of memory, and place ECC-protected ramoops
region at 128 MB boundary:
"mem=128M ramoops.mem_address=0x8000000 ramoops.ecc=1"
- 2. Use a platform device and set the platform data. The parameters can then
+ 2. Use Device Tree bindings, as described in
+ Documentation/device-tree/bindings/misc/ramoops.txt.
+ 3. Use a platform device and set the platform data. The parameters can then
be set through that platform data. An example of doing that is:
#include <linux/pstore_ram.h>
diff --git a/Documentation/scheduler/sched-energy.txt b/Documentation/scheduler/sched-energy.txt
new file mode 100644
index 000000000000..dab2f9088b33
--- /dev/null
+++ b/Documentation/scheduler/sched-energy.txt
@@ -0,0 +1,362 @@
+Energy cost model for energy-aware scheduling (EXPERIMENTAL)
+
+Introduction
+=============
+
+The basic energy model uses platform energy data stored in sched_group_energy
+data structures attached to the sched_groups in the sched_domain hierarchy. The
+energy cost model offers two functions that can be used to guide scheduling
+decisions:
+
+1. static unsigned int sched_group_energy(struct energy_env *eenv)
+2. static int energy_diff(struct energy_env *eenv)
+
+sched_group_energy() estimates the energy consumed by all cpus in a specific
+sched_group including any shared resources owned exclusively by this group of
+cpus. Resources shared with other cpus are excluded (e.g. later level caches).
+
+energy_diff() estimates the total energy impact of a utilization change. That
+is, adding, removing, or migrating utilization (tasks).
+
+Both functions use a struct energy_env to specify the scenario to be evaluated:
+
+ struct energy_env {
+ struct sched_group *sg_top;
+ struct sched_group *sg_cap;
+ int cap_idx;
+ int util_delta;
+ int src_cpu;
+ int dst_cpu;
+ int energy;
+ };
+
+sg_top: sched_group to be evaluated. Not used by energy_diff().
+
+sg_cap: sched_group covering the cpus in the same frequency domain. Set by
+sched_group_energy().
+
+cap_idx: Capacity state to be used for energy calculations. Set by
+find_new_capacity().
+
+util_delta: Amount of utilization to be added, removed, or migrated.
+
+src_cpu: Source cpu from where 'util_delta' utilization is removed. Should be
+-1 if no source (e.g. task wake-up).
+
+dst_cpu: Destination cpu where 'util_delta' utilization is added. Should be -1
+if utilization is removed (e.g. terminating tasks).
+
+energy: Result of sched_group_energy().
+
+The metric used to represent utilization is the actual per-entity running time
+averaged over time using a geometric series. Very similar to the existing
+per-entity load-tracking, but _not_ scaled by task priority and capped by the
+capacity of the cpu. The latter property does mean that utilization may
+underestimate the compute requirements for task on fully/over utilized cpus.
+The greatest potential for energy savings without affecting performance too much
+is scenarios where the system isn't fully utilized. If the system is deemed
+fully utilized load-balancing should be done with task load (includes task
+priority) instead in the interest of fairness and performance.
+
+
+Background and Terminology
+===========================
+
+To make it clear from the start:
+
+energy = [joule] (resource like a battery on powered devices)
+power = energy/time = [joule/second] = [watt]
+
+The goal of energy-aware scheduling is to minimize energy, while still getting
+the job done. That is, we want to maximize:
+
+ performance [inst/s]
+ --------------------
+ power [W]
+
+which is equivalent to minimizing:
+
+ energy [J]
+ -----------
+ instruction
+
+while still getting 'good' performance. It is essentially an alternative
+optimization objective to the current performance-only objective for the
+scheduler. This alternative considers two objectives: energy-efficiency and
+performance. Hence, there needs to be a user controllable knob to switch the
+objective. Since it is early days, this is currently a sched_feature
+(ENERGY_AWARE).
+
+The idea behind introducing an energy cost model is to allow the scheduler to
+evaluate the implications of its decisions rather than applying energy-saving
+techniques blindly that may only have positive effects on some platforms. At
+the same time, the energy cost model must be as simple as possible to minimize
+the scheduler latency impact.
+
+Platform topology
+------------------
+
+The system topology (cpus, caches, and NUMA information, not peripherals) is
+represented in the scheduler by the sched_domain hierarchy which has
+sched_groups attached at each level that covers one or more cpus (see
+sched-domains.txt for more details). To add energy awareness to the scheduler
+we need to consider power and frequency domains.
+
+Power domain:
+
+A power domain is a part of the system that can be powered on/off
+independently. Power domains are typically organized in a hierarchy where you
+may be able to power down just a cpu or a group of cpus along with any
+associated resources (e.g. shared caches). Powering up a cpu means that all
+power domains it is a part of in the hierarchy must be powered up. Hence, it is
+more expensive to power up the first cpu that belongs to a higher level power
+domain than powering up additional cpus in the same high level domain. Two
+level power domain hierarchy example:
+
+ Power source
+ +-------------------------------+----...
+per group PD G G
+ | +----------+ |
+ +--------+-------| Shared | (other groups)
+per-cpu PD G G | resource |
+ | | +----------+
+ +-------+ +-------+
+ | CPU 0 | | CPU 1 |
+ +-------+ +-------+
+
+Frequency domain:
+
+Frequency domains (P-states) typically cover the same group of cpus as one of
+the power domain levels. That is, there might be several smaller power domains
+sharing the same frequency (P-state) or there might be a power domain spanning
+multiple frequency domains.
+
+From a scheduling point of view there is no need to know the actual frequencies
+[Hz]. All the scheduler cares about is the compute capacity available at the
+current state (P-state) the cpu is in and any other available states. For that
+reason, and to also factor in any cpu micro-architecture differences, compute
+capacity scaling states are called 'capacity states' in this document. For SMP
+systems this is equivalent to P-states. For mixed micro-architecture systems
+(like ARM big.LITTLE) it is P-states scaled according to the micro-architecture
+performance relative to the other cpus in the system.
+
+Energy modelling:
+------------------
+
+Due to the hierarchical nature of the power domains, the most obvious way to
+model energy costs is therefore to associate power and energy costs with
+domains (groups of cpus). Energy costs of shared resources are associated with
+the group of cpus that share the resources, only the cost of powering the
+cpu itself and any private resources (e.g. private L1 caches) is associated
+with the per-cpu groups (lowest level).
+
+For example, for an SMP system with per-cpu power domains and a cluster level
+(group of cpus) power domain we get the overall energy costs to be:
+
+ energy = energy_cluster + n * energy_cpu
+
+where 'n' is the number of cpus powered up and energy_cluster is the cost paid
+as soon as any cpu in the cluster is powered up.
+
+The power and frequency domains can naturally be mapped onto the existing
+sched_domain hierarchy and sched_groups by adding the necessary data to the
+existing data structures.
+
+The energy model considers energy consumption from two contributors (shown in
+the illustration below):
+
+1. Busy energy: Energy consumed while a cpu and the higher level groups that it
+belongs to are busy running tasks. Busy energy is associated with the state of
+the cpu, not an event. The time the cpu spends in this state varies. Thus, the
+most obvious platform parameter for this contribution is busy power
+(energy/time).
+
+2. Idle energy: Energy consumed while a cpu and higher level groups that it
+belongs to are idle (in a C-state). Like busy energy, idle energy is associated
+with the state of the cpu. Thus, the platform parameter for this contribution
+is idle power (energy/time).
+
+Energy consumed during transitions from an idle-state (C-state) to a busy state
+(P-state) or going the other way is ignored by the model to simplify the energy
+model calculations.
+
+
+ Power
+ ^
+ | busy->idle idle->busy
+ | transition transition
+ |
+ | _ __
+ | / \ / \__________________
+ |______________/ \ /
+ | \ /
+ | Busy \ Idle / Busy
+ | low P-state \____________/ high P-state
+ |
+ +------------------------------------------------------------> time
+
+Busy |--------------| |-----------------|
+
+Wakeup |------| |------|
+
+Idle |------------|
+
+
+The basic algorithm
+====================
+
+The basic idea is to determine the total energy impact when utilization is
+added or removed by estimating the impact at each level in the sched_domain
+hierarchy starting from the bottom (sched_group contains just a single cpu).
+The energy cost comes from busy time (sched_group is awake because one or more
+cpus are busy) and idle time (in an idle-state). Energy model numbers account
+for energy costs associated with all cpus in the sched_group as a group.
+
+ for_each_domain(cpu, sd) {
+ sg = sched_group_of(cpu)
+ energy_before = curr_util(sg) * busy_power(sg)
+ + (1-curr_util(sg)) * idle_power(sg)
+ energy_after = new_util(sg) * busy_power(sg)
+ + (1-new_util(sg)) * idle_power(sg)
+ energy_diff += energy_before - energy_after
+
+ }
+
+ return energy_diff
+
+{curr, new}_util: The cpu utilization at the lowest level and the overall
+non-idle time for the entire group for higher levels. Utilization is in the
+range 0.0 to 1.0 in the pseudo-code.
+
+busy_power: The power consumption of the sched_group.
+
+idle_power: The power consumption of the sched_group when idle.
+
+Note: It is a fundamental assumption that the utilization is (roughly) scale
+invariant. Task utilization tracking factors in any frequency scaling and
+performance scaling differences due to difference cpu microarchitectures such
+that task utilization can be used across the entire system.
+
+
+Platform energy data
+=====================
+
+struct sched_group_energy can be attached to sched_groups in the sched_domain
+hierarchy and has the following members:
+
+cap_states:
+ List of struct capacity_state representing the supported capacity states
+ (P-states). struct capacity_state has two members: cap and power, which
+ represents the compute capacity and the busy_power of the state. The
+ list must be ordered by capacity low->high.
+
+nr_cap_states:
+ Number of capacity states in cap_states list.
+
+idle_states:
+ List of struct idle_state containing idle_state power cost for each
+ idle-state supported by the system orderd by shallowest state first.
+ All states must be included at all level in the hierarchy, i.e. a
+ sched_group spanning just a single cpu must also include coupled
+ idle-states (cluster states). In addition to the cpuidle idle-states,
+ the list must also contain an entry for the idling using the arch
+ default idle (arch_idle_cpu()). Despite this state may not be a true
+ hardware idle-state it is considered the shallowest idle-state in the
+ energy model and must be the first entry. cpus may enter this state
+ (possibly 'active idling') if cpuidle decides not enter a cpuidle
+ idle-state. Default idle may not be used when cpuidle is enabled.
+ In this case, it should just be a copy of the first cpuidle idle-state.
+
+nr_idle_states:
+ Number of idle states in idle_states list.
+
+There are no unit requirements for the energy cost data. Data can be normalized
+with any reference, however, the normalization must be consistent across all
+energy cost data. That is, one bogo-joule/watt must be the same quantity for
+data, but we don't care what it is.
+
+A recipe for platform characterization
+=======================================
+
+Obtaining the actual model data for a particular platform requires some way of
+measuring power/energy. There isn't a tool to help with this (yet). This
+section provides a recipe for use as reference. It covers the steps used to
+characterize the ARM TC2 development platform. This sort of measurements is
+expected to be done anyway when tuning cpuidle and cpufreq for a given
+platform.
+
+The energy model needs two types of data (struct sched_group_energy holds
+these) for each sched_group where energy costs should be taken into account:
+
+1. Capacity state information
+
+A list containing the compute capacity and power consumption when fully
+utilized attributed to the group as a whole for each available capacity state.
+At the lowest level (group contains just a single cpu) this is the power of the
+cpu alone without including power consumed by resources shared with other cpus.
+It basically needs to fit the basic modelling approach described in "Background
+and Terminology" section:
+
+ energy_system = energy_shared + n * energy_cpu
+
+for a system containing 'n' busy cpus. Only 'energy_cpu' should be included at
+the lowest level. 'energy_shared' is included at the next level which
+represents the group of cpus among which the resources are shared.
+
+This model is, of course, a simplification of reality. Thus, power/energy
+attributions might not always exactly represent how the hardware is designed.
+Also, busy power is likely to depend on the workload. It is therefore
+recommended to use a representative mix of workloads when characterizing the
+capacity states.
+
+If the group has no capacity scaling support, the list will contain a single
+state where power is the busy power attributed to the group. The capacity
+should be set to a default value (1024).
+
+When frequency domains include multiple power domains, the group representing
+the frequency domain and all child groups share capacity states. This must be
+indicated by setting the SD_SHARE_CAP_STATES sched_domain flag. All groups at
+all levels that share the capacity state must have the list of capacity states
+with the power set to the contribution of the individual group.
+
+2. Idle power information
+
+Stored in the idle_states list. The power number is the group idle power
+consumption in each idle state as well when the group is idle but has not
+entered an idle-state ('active idle' as mentioned earlier). Due to the way the
+energy model is defined, the idle power of the deepest group idle state can
+alternatively be accounted for in the parent group busy power. In that case the
+group idle state power values are offset such that the idle power of the
+deepest state is zero. It is less intuitive, but it is easier to measure as
+idle power consumed by the group and the busy/idle power of the parent group
+cannot be distinguished without per group measurement points.
+
+Measuring capacity states and idle power:
+
+The capacity states' capacity and power can be estimated by running a benchmark
+workload at each available capacity state. By restricting the benchmark to run
+on subsets of cpus it is possible to extrapolate the power consumption of
+shared resources.
+
+ARM TC2 has two clusters of two and three cpus respectively. Each cluster has a
+shared L2 cache. TC2 has on-chip energy counters per cluster. Running a
+benchmark workload on just one cpu in a cluster means that power is consumed in
+the cluster (higher level group) and a single cpu (lowest level group). Adding
+another benchmark task to another cpu increases the power consumption by the
+amount consumed by the additional cpu. Hence, it is possible to extrapolate the
+cluster busy power.
+
+For platforms that don't have energy counters or equivalent instrumentation
+built-in, it may be possible to use an external DAQ to acquire similar data.
+
+If the benchmark includes some performance score (for example sysbench cpu
+benchmark), this can be used to record the compute capacity.
+
+Measuring idle power requires insight into the idle state implementation on the
+particular platform. Specifically, if the platform has coupled idle-states (or
+package states). To measure non-coupled per-cpu idle-states it is necessary to
+keep one cpu busy to keep any shared resources alive to isolate the idle power
+of the cpu from idle/busy power of the shared resources. The cpu can be tricked
+into different per-cpu idle states by disabling the other states. Based on
+various combinations of measurements with specific cpus busy and disabling
+idle-states it is possible to extrapolate the idle-state power.
diff --git a/Documentation/scheduler/sched-tune.txt b/Documentation/scheduler/sched-tune.txt
new file mode 100644
index 000000000000..9bd2231c01b1
--- /dev/null
+++ b/Documentation/scheduler/sched-tune.txt
@@ -0,0 +1,366 @@
+ Central, scheduler-driven, power-performance control
+ (EXPERIMENTAL)
+
+Abstract
+========
+
+The topic of a single simple power-performance tunable, that is wholly
+scheduler centric, and has well defined and predictable properties has come up
+on several occasions in the past [1,2]. With techniques such as a scheduler
+driven DVFS [3], we now have a good framework for implementing such a tunable.
+This document describes the overall ideas behind its design and implementation.
+
+
+Table of Contents
+=================
+
+1. Motivation
+2. Introduction
+3. Signal Boosting Strategy
+4. OPP selection using boosted CPU utilization
+5. Per task group boosting
+6. Question and Answers
+ - What about "auto" mode?
+ - What about boosting on a congested system?
+ - How CPUs are boosted when we have tasks with multiple boost values?
+7. References
+
+
+1. Motivation
+=============
+
+Sched-DVFS [3] is a new event-driven cpufreq governor which allows the
+scheduler to select the optimal DVFS operating point (OPP) for running a task
+allocated to a CPU. The introduction of sched-DVFS enables running workloads at
+the most energy efficient OPPs.
+
+However, sometimes it may be desired to intentionally boost the performance of
+a workload even if that could imply a reasonable increase in energy
+consumption. For example, in order to reduce the response time of a task, we
+may want to run the task at a higher OPP than the one that is actually required
+by it's CPU bandwidth demand.
+
+This last requirement is especially important if we consider that one of the
+main goals of the sched-DVFS component is to replace all currently available
+CPUFreq policies. Since sched-DVFS is event based, as opposed to the sampling
+driven governors we currently have, it is already more responsive at selecting
+the optimal OPP to run tasks allocated to a CPU. However, just tracking the
+actual task load demand may not be enough from a performance standpoint. For
+example, it is not possible to get behaviors similar to those provided by the
+"performance" and "interactive" CPUFreq governors.
+
+This document describes an implementation of a tunable, stacked on top of the
+sched-DVFS which extends its functionality to support task performance
+boosting.
+
+By "performance boosting" we mean the reduction of the time required to
+complete a task activation, i.e. the time elapsed from a task wakeup to its
+next deactivation (e.g. because it goes back to sleep or it terminates). For
+example, if we consider a simple periodic task which executes the same workload
+for 5[s] every 20[s] while running at a certain OPP, a boosted execution of
+that task must complete each of its activations in less than 5[s].
+
+A previous attempt [5] to introduce such a boosting feature has not been
+successful mainly because of the complexity of the proposed solution. The
+approach described in this document exposes a single simple interface to
+user-space. This single tunable knob allows the tuning of system wide
+scheduler behaviours ranging from energy efficiency at one end through to
+incremental performance boosting at the other end. This first tunable affects
+all tasks. However, a more advanced extension of the concept is also provided
+which uses CGroups to boost the performance of only selected tasks while using
+the energy efficient default for all others.
+
+The rest of this document introduces in more details the proposed solution
+which has been named SchedTune.
+
+
+2. Introduction
+===============
+
+SchedTune exposes a simple user-space interface with a single power-performance
+tunable:
+
+ /proc/sys/kernel/sched_cfs_boost
+
+This permits expressing a boost value as an integer in the range [0..100].
+
+A value of 0 (default) configures the CFS scheduler for maximum energy
+efficiency. This means that sched-DVFS runs the tasks at the minimum OPP
+required to satisfy their workload demand.
+A value of 100 configures scheduler for maximum performance, which translates
+to the selection of the maximum OPP on that CPU.
+
+The range between 0 and 100 can be set to satisfy other scenarios suitably. For
+example to satisfy interactive response or depending on other system events
+(battery level etc).
+
+A CGroup based extension is also provided, which permits further user-space
+defined task classification to tune the scheduler for different goals depending
+on the specific nature of the task, e.g. background vs interactive vs
+low-priority.
+
+The overall design of the SchedTune module is built on top of "Per-Entity Load
+Tracking" (PELT) signals and sched-DVFS by introducing a bias on the Operating
+Performance Point (OPP) selection.
+Each time a task is allocated on a CPU, sched-DVFS has the opportunity to tune
+the operating frequency of that CPU to better match the workload demand. The
+selection of the actual OPP being activated is influenced by the global boost
+value, or the boost value for the task CGroup when in use.
+
+This simple biasing approach leverages existing frameworks, which means minimal
+modifications to the scheduler, and yet it allows to achieve a range of
+different behaviours all from a single simple tunable knob.
+The only new concept introduced is that of signal boosting.
+
+
+3. Signal Boosting Strategy
+===========================
+
+The whole PELT machinery works based on the value of a few load tracking signals
+which basically track the CPU bandwidth requirements for tasks and the capacity
+of CPUs. The basic idea behind the SchedTune knob is to artificially inflate
+some of these load tracking signals to make a task or RQ appears more demanding
+that it actually is.
+
+Which signals have to be inflated depends on the specific "consumer". However,
+independently from the specific (signal, consumer) pair, it is important to
+define a simple and possibly consistent strategy for the concept of boosting a
+signal.
+
+A boosting strategy defines how the "abstract" user-space defined
+sched_cfs_boost value is translated into an internal "margin" value to be added
+to a signal to get its inflated value:
+
+ margin := boosting_strategy(sched_cfs_boost, signal)
+ boosted_signal := signal + margin
+
+Different boosting strategies were identified and analyzed before selecting the
+one found to be most effective.
+
+Signal Proportional Compensation (SPC)
+--------------------------------------
+
+In this boosting strategy the sched_cfs_boost value is used to compute a
+margin which is proportional to the complement of the original signal.
+When a signal has a maximum possible value, its complement is defined as
+the delta from the actual value and its possible maximum.
+
+Since the tunable implementation uses signals which have SCHED_LOAD_SCALE as
+the maximum possible value, the margin becomes:
+
+ margin := sched_cfs_boost * (SCHED_LOAD_SCALE - signal)
+
+Using this boosting strategy:
+- a 100% sched_cfs_boost means that the signal is scaled to the maximum value
+- each value in the range of sched_cfs_boost effectively inflates the signal in
+ question by a quantity which is proportional to the maximum value.
+
+For example, by applying the SPC boosting strategy to the selection of the OPP
+to run a task it is possible to achieve these behaviors:
+
+- 0% boosting: run the task at the minimum OPP required by its workload
+- 100% boosting: run the task at the maximum OPP available for the CPU
+- 50% boosting: run at the half-way OPP between minimum and maximum
+
+Which means that, at 50% boosting, a task will be scheduled to run at half of
+the maximum theoretically achievable performance on the specific target
+platform.
+
+A graphical representation of an SPC boosted signal is represented in the
+following figure where:
+ a) "-" represents the original signal
+ b) "b" represents a 50% boosted signal
+ c) "p" represents a 100% boosted signal
+
+
+ ^
+ | SCHED_LOAD_SCALE
+ +-----------------------------------------------------------------+
+ |pppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp
+ |
+ | boosted_signal
+ | bbbbbbbbbbbbbbbbbbbbbbbb
+ |
+ | original signal
+ | bbbbbbbbbbbbbbbbbbbbbbbb+----------------------+
+ | |
+ |bbbbbbbbbbbbbbbbbb |
+ | |
+ | |
+ | |
+ | +-----------------------+
+ | |
+ | |
+ | |
+ |------------------+
+ |
+ |
+ +----------------------------------------------------------------------->
+
+The plot above shows a ramped load signal (titled 'original_signal') and it's
+boosted equivalent. For each step of the original signal the boosted signal
+corresponding to a 50% boost is midway from the original signal and the upper
+bound. Boosting by 100% generates a boosted signal which is always saturated to
+the upper bound.
+
+
+4. OPP selection using boosted CPU utilization
+==============================================
+
+It is worth calling out that the implementation does not introduce any new load
+signals. Instead, it provides an API to tune existing signals. This tuning is
+done on demand and only in scheduler code paths where it is sensible to do so.
+The new API calls are defined to return either the default signal or a boosted
+one, depending on the value of sched_cfs_boost. This is a clean an non invasive
+modification of the existing existing code paths.
+
+The signal representing a CPU's utilization is boosted according to the
+previously described SPC boosting strategy. To sched-DVFS, this allows a CPU
+(ie CFS run-queue) to appear more used then it actually is.
+
+Thus, with the sched_cfs_boost enabled we have the following main functions to
+get the current utilization of a CPU:
+
+ cpu_util()
+ boosted_cpu_util()
+
+The new boosted_cpu_util() is similar to the first but returns a boosted
+utilization signal which is a function of the sched_cfs_boost value.
+
+This function is used in the CFS scheduler code paths where sched-DVFS needs to
+decide the OPP to run a CPU at.
+For example, this allows selecting the highest OPP for a CPU which has
+the boost value set to 100%.
+
+
+5. Per task group boosting
+==========================
+
+The availability of a single knob which is used to boost all tasks in the
+system is certainly a simple solution but it quite likely doesn't fit many
+utilization scenarios, especially in the mobile device space.
+
+For example, on battery powered devices there usually are many background
+services which are long running and need energy efficient scheduling. On the
+other hand, some applications are more performance sensitive and require an
+interactive response and/or maximum performance, regardless of the energy cost.
+To better service such scenarios, the SchedTune implementation has an extension
+that provides a more fine grained boosting interface.
+
+A new CGroup controller, namely "schedtune", could be enabled which allows to
+defined and configure task groups with different boosting values.
+Tasks that require special performance can be put into separate CGroups.
+The value of the boost associated with the tasks in this group can be specified
+using a single knob exposed by the CGroup controller:
+
+ schedtune.boost
+
+This knob allows the definition of a boost value that is to be used for
+SPC boosting of all tasks attached to this group.
+
+The current schedtune controller implementation is really simple and has these
+main characteristics:
+
+ 1) It is only possible to create 1 level depth hierarchies
+
+ The root control groups define the system-wide boost value to be applied
+ by default to all tasks. Its direct subgroups are named "boost groups" and
+ they define the boost value for specific set of tasks.
+ Further nested subgroups are not allowed since they do not have a sensible
+ meaning from a user-space standpoint.
+
+ 2) It is possible to define only a limited number of "boost groups"
+
+ This number is defined at compile time and by default configured to 16.
+ This is a design decision motivated by two main reasons:
+ a) In a real system we do not expect utilization scenarios with more then few
+ boost groups. For example, a reasonable collection of groups could be
+ just "background", "interactive" and "performance".
+ b) It simplifies the implementation considerably, especially for the code
+ which has to compute the per CPU boosting once there are multiple
+ RUNNABLE tasks with different boost values.
+
+Such a simple design should allow servicing the main utilization scenarios identified
+so far. It provides a simple interface which can be used to manage the
+power-performance of all tasks or only selected tasks.
+Moreover, this interface can be easily integrated by user-space run-times (e.g.
+Android, ChromeOS) to implement a QoS solution for task boosting based on tasks
+classification, which has been a long standing requirement.
+
+Setup and usage
+---------------
+
+0. Use a kernel with CGROUP_SCHEDTUNE support enabled
+
+1. Check that the "schedtune" CGroup controller is available:
+
+ root@linaro-nano:~# cat /proc/cgroups
+ #subsys_name hierarchy num_cgroups enabled
+ cpuset 0 1 1
+ cpu 0 1 1
+ schedtune 0 1 1
+
+2. Mount a tmpfs to create the CGroups mount point (Optional)
+
+ root@linaro-nano:~# sudo mount -t tmpfs cgroups /sys/fs/cgroup
+
+3. Mount the "schedtune" controller
+
+ root@linaro-nano:~# mkdir /sys/fs/cgroup/stune
+ root@linaro-nano:~# sudo mount -t cgroup -o schedtune stune /sys/fs/cgroup/stune
+
+4. Setup the system-wide boost value (Optional)
+
+ If not configured the root control group has a 0% boost value, which
+ basically disables boosting for all tasks in the system thus running in
+ an energy-efficient mode.
+
+ root@linaro-nano:~# echo $SYSBOOST > /sys/fs/cgroup/stune/schedtune.boost
+
+5. Create task groups and configure their specific boost value (Optional)
+
+ For example here we create a "performance" boost group configure to boost
+ all its tasks to 100%
+
+ root@linaro-nano:~# mkdir /sys/fs/cgroup/stune/performance
+ root@linaro-nano:~# echo 100 > /sys/fs/cgroup/stune/performance/schedtune.boost
+
+6. Move tasks into the boost group
+
+ For example, the following moves the tasks with PID $TASKPID (and all its
+ threads) into the "performance" boost group.
+
+ root@linaro-nano:~# echo "TASKPID > /sys/fs/cgroup/stune/performance/cgroup.procs
+
+This simple configuration allows only the threads of the $TASKPID task to run,
+when needed, at the highest OPP in the most capable CPU of the system.
+
+
+6. Question and Answers
+=======================
+
+What about "auto" mode?
+-----------------------
+
+The 'auto' mode as described in [5] can be implemented by interfacing SchedTune
+with some suitable user-space element. This element could use the exposed
+system-wide or cgroup based interface.
+
+How are multiple groups of tasks with different boost values managed?
+---------------------------------------------------------------------
+
+The current SchedTune implementation keeps track of the boosted RUNNABLE tasks
+on a CPU. Once sched-DVFS selects the OPP to run a CPU at, the CPU utilization
+is boosted with a value which is the maximum of the boost values of the
+currently RUNNABLE tasks in its RQ.
+
+This allows sched-DVFS to boost a CPU only while there are boosted tasks ready
+to run and switch back to the energy efficient mode as soon as the last boosted
+task is dequeued.
+
+
+7. References
+=============
+[1] http://lwn.net/Articles/552889
+[2] http://lkml.org/lkml/2012/5/18/91
+[3] http://lkml.org/lkml/2015/6/26/620
diff --git a/Documentation/sync.txt b/Documentation/sync.txt
new file mode 100644
index 000000000000..a2d05e7fa193
--- /dev/null
+++ b/Documentation/sync.txt
@@ -0,0 +1,75 @@
+Motivation:
+
+In complicated DMA pipelines such as graphics (multimedia, camera, gpu, display)
+a consumer of a buffer needs to know when the producer has finished producing
+it. Likewise the producer needs to know when the consumer is finished with the
+buffer so it can reuse it. A particular buffer may be consumed by multiple
+consumers which will retain the buffer for different amounts of time. In
+addition, a consumer may consume multiple buffers atomically.
+The sync framework adds an API which allows synchronization between the
+producers and consumers in a generic way while also allowing platforms which
+have shared hardware synchronization primitives to exploit them.
+
+Goals:
+ * provide a generic API for expressing synchronization dependencies
+ * allow drivers to exploit hardware synchronization between hardware
+ blocks
+ * provide a userspace API that allows a compositor to manage
+ dependencies.
+ * provide rich telemetry data to allow debugging slowdowns and stalls of
+ the graphics pipeline.
+
+Objects:
+ * sync_timeline
+ * sync_pt
+ * sync_fence
+
+sync_timeline:
+
+A sync_timeline is an abstract monotonically increasing counter. In general,
+each driver/hardware block context will have one of these. They can be backed
+by the appropriate hardware or rely on the generic sw_sync implementation.
+Timelines are only ever created through their specific implementations
+(i.e. sw_sync.)
+
+sync_pt:
+
+A sync_pt is an abstract value which marks a point on a sync_timeline. Sync_pts
+have a single timeline parent. They have 3 states: active, signaled, and error.
+They start in active state and transition, once, to either signaled (when the
+timeline counter advances beyond the sync_pt’s value) or error state.
+
+sync_fence:
+
+Sync_fences are the primary primitives used by drivers to coordinate
+synchronization of their buffers. They are a collection of sync_pts which may
+or may not have the same timeline parent. A sync_pt can only exist in one fence
+and the fence's list of sync_pts is immutable once created. Fences can be
+waited on synchronously or asynchronously. Two fences can also be merged to
+create a third fence containing a copy of the two fences’ sync_pts. Fences are
+backed by file descriptors to allow userspace to coordinate the display pipeline
+dependencies.
+
+Use:
+
+A driver implementing sync support should have a work submission function which:
+ * takes a fence argument specifying when to begin work
+ * asynchronously queues that work to kick off when the fence is signaled
+ * returns a fence to indicate when its work will be done.
+ * signals the returned fence once the work is completed.
+
+Consider an imaginary display driver that has the following API:
+/*
+ * assumes buf is ready to be displayed.
+ * blocks until the buffer is on screen.
+ */
+ void display_buffer(struct dma_buf *buf);
+
+The new API will become:
+/*
+ * will display buf when fence is signaled.
+ * returns immediately with a fence that will signal when buf
+ * is no longer displayed.
+ */
+struct sync_fence* display_buffer(struct dma_buf *buf,
+ struct sync_fence *fence);
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index af70d1541d3a..5728779df1ab 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -58,6 +58,8 @@ show up in /proc/sys/kernel:
- panic_on_stackoverflow
- panic_on_unrecovered_nmi
- panic_on_warn
+- perf_cpu_time_max_percent
+- perf_event_paranoid
- pid_max
- powersave-nap [ PPC only ]
- printk
@@ -624,6 +626,19 @@ allowed to execute.
==============================================================
+perf_event_paranoid:
+
+Controls use of the performance events system by unprivileged
+users (without CAP_SYS_ADMIN). The default value is 3 if
+CONFIG_SECURITY_PERF_EVENTS_RESTRICT is set, or 1 otherwise.
+
+ -1: Allow use of (almost) all events by all users
+>=0: Disallow raw tracepoint access by users without CAP_IOC_LOCK
+>=1: Disallow CPU event access by users without CAP_SYS_ADMIN
+>=2: Disallow kernel profiling by users without CAP_SYS_ADMIN
+>=3: Disallow all event access by users without CAP_SYS_ADMIN
+
+==============================================================
pid_max:
diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt
index f72370b440b1..c0397afe6a1d 100644
--- a/Documentation/sysctl/vm.txt
+++ b/Documentation/sysctl/vm.txt
@@ -30,6 +30,7 @@ Currently, these files are in /proc/sys/vm:
- dirty_writeback_centisecs
- drop_caches
- extfrag_threshold
+- extra_free_kbytes
- hugepages_treat_as_movable
- hugetlb_shm_group
- laptop_mode
@@ -42,6 +43,8 @@ Currently, these files are in /proc/sys/vm:
- min_slab_ratio
- min_unmapped_ratio
- mmap_min_addr
+- mmap_rnd_bits
+- mmap_rnd_compat_bits
- nr_hugepages
- nr_overcommit_hugepages
- nr_trim_pages (only if CONFIG_MMU=n)
@@ -236,6 +239,21 @@ fragmentation index is <= extfrag_threshold. The default value is 500.
==============================================================
+extra_free_kbytes
+
+This parameter tells the VM to keep extra free memory between the threshold
+where background reclaim (kswapd) kicks in, and the threshold where direct
+reclaim (by allocating processes) kicks in.
+
+This is useful for workloads that require low latency memory allocations
+and have a bounded burstiness in memory allocations, for example a
+realtime application that receives and transmits network traffic
+(causing in-kernel memory allocations) with a maximum total message burst
+size of 200MB may need 200MB of extra free memory to avoid direct reclaim
+related latencies.
+
+==============================================================
+
hugepages_treat_as_movable
This parameter controls whether we can allocate hugepages from ZONE_MOVABLE
@@ -485,6 +503,33 @@ against future potential kernel bugs.
==============================================================
+mmap_rnd_bits:
+
+This value can be used to select the number of bits to use to
+determine the random offset to the base address of vma regions
+resulting from mmap allocations on architectures which support
+tuning address space randomization. This value will be bounded
+by the architecture's minimum and maximum supported values.
+
+This value can be changed after boot using the
+/proc/sys/vm/mmap_rnd_bits tunable
+
+==============================================================
+
+mmap_rnd_compat_bits:
+
+This value can be used to select the number of bits to use to
+determine the random offset to the base address of vma regions
+resulting from mmap allocations for applications run in
+compatibility mode on architectures which support tuning address
+space randomization. This value will be bounded by the
+architecture's minimum and maximum supported values.
+
+This value can be changed after boot using the
+/proc/sys/vm/mmap_rnd_compat_bits tunable
+
+==============================================================
+
nr_hugepages
Change the minimum size of the hugepage pool.
diff --git a/Documentation/trace/events-power.txt b/Documentation/trace/events-power.txt
index 21d514ced212..4d817d5acc40 100644
--- a/Documentation/trace/events-power.txt
+++ b/Documentation/trace/events-power.txt
@@ -25,6 +25,7 @@ cpufreq.
cpu_idle "state=%lu cpu_id=%lu"
cpu_frequency "state=%lu cpu_id=%lu"
+cpu_frequency_limits "min=%lu max=%lu cpu_id=%lu"
A suspend event is used to indicate the system going in and out of the
suspend mode:
diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt
index f52f297cb406..fa16fb2302a5 100644
--- a/Documentation/trace/ftrace.txt
+++ b/Documentation/trace/ftrace.txt
@@ -357,6 +357,26 @@ of ftrace. Here is a list of some of the key files:
to correlate events across hypervisor/guest if
tb_offset is known.
+ mono: This uses the fast monotonic clock (CLOCK_MONOTONIC)
+ which is monotonic and is subject to NTP rate adjustments.
+
+ mono_raw:
+ This is the raw monotonic clock (CLOCK_MONOTONIC_RAW)
+ which is montonic but is not subject to any rate adjustments
+ and ticks at the same rate as the hardware clocksource.
+
+ boot: This is the boot clock (CLOCK_BOOTTIME) and is based on the
+ fast monotonic clock, but also accounts for time spent in
+ suspend. Since the clock access is designed for use in
+ tracing in the suspend path, some side effects are possible
+ if clock is accessed after the suspend time is accounted before
+ the fast mono clock is updated. In this case, the clock update
+ appears to happen slightly sooner than it normally would have.
+ Also on 32-bit systems, its possible that the 64-bit boot offset
+ sees a partial update. These effects are rare and post
+ processing should be able to handle them. See comments on
+ ktime_get_boot_fast_ns function for more information.
+
To set a clock, simply echo the clock name into this file.
echo global > trace_clock
@@ -2088,6 +2108,35 @@ will produce:
1) 1.449 us | }
+You can disable the hierarchical function call formatting and instead print a
+flat list of function entry and return events. This uses the format described
+in the Output Formatting section and respects all the trace options that
+control that formatting. Hierarchical formatting is the default.
+
+ hierachical: echo nofuncgraph-flat > trace_options
+ flat: echo funcgraph-flat > trace_options
+
+ ie:
+
+ # tracer: function_graph
+ #
+ # entries-in-buffer/entries-written: 68355/68355 #P:2
+ #
+ # _-----=> irqs-off
+ # / _----=> need-resched
+ # | / _---=> hardirq/softirq
+ # || / _--=> preempt-depth
+ # ||| / delay
+ # TASK-PID CPU# |||| TIMESTAMP FUNCTION
+ # | | | |||| | |
+ sh-1806 [001] d... 198.843443: graph_ent: func=_raw_spin_lock
+ sh-1806 [001] d... 198.843445: graph_ent: func=__raw_spin_lock
+ sh-1806 [001] d..1 198.843447: graph_ret: func=__raw_spin_lock
+ sh-1806 [001] d..1 198.843449: graph_ret: func=_raw_spin_lock
+ sh-1806 [001] d..1 198.843451: graph_ent: func=_raw_spin_unlock_irqrestore
+ sh-1806 [001] d... 198.843453: graph_ret: func=_raw_spin_unlock_irqrestore
+
+
You might find other useful features for this tracer in the
following "dynamic ftrace" section such as tracing only specific
functions or tasks.
diff --git a/android/configs/README b/android/configs/README
new file mode 100644
index 000000000000..8798731f8904
--- /dev/null
+++ b/android/configs/README
@@ -0,0 +1,15 @@
+The files in this directory are meant to be used as a base for an Android
+kernel config. All devices should have the options in android-base.cfg enabled.
+While not mandatory, the options in android-recommended.cfg enable advanced
+Android features.
+
+Assuming you already have a minimalist defconfig for your device, a possible
+way to enable these options would be:
+
+ ARCH=<arch> scripts/kconfig/merge_config.sh <path_to>/<device>_defconfig android/configs/android-base.cfg android/configs/android-recommended.cfg
+
+This will generate a .config that can then be used to save a new defconfig or
+compile a new kernel with Android features enabled.
+
+Because there is no tool to consistently generate these config fragments,
+lets keep them alphabetically sorted instead of random.
diff --git a/android/configs/android-base.cfg b/android/configs/android-base.cfg
new file mode 100644
index 000000000000..f10371a981b7
--- /dev/null
+++ b/android/configs/android-base.cfg
@@ -0,0 +1,172 @@
+# KEEP ALPHABETICALLY SORTED
+# CONFIG_DEVKMEM is not set
+# CONFIG_DEVMEM is not set
+# CONFIG_INET_LRO is not set
+# CONFIG_MODULES is not set
+# CONFIG_OABI_COMPAT is not set
+# CONFIG_SYSVIPC is not set
+CONFIG_ANDROID=y
+CONFIG_ANDROID_BINDER_IPC=y
+CONFIG_ANDROID_LOW_MEMORY_KILLER=y
+CONFIG_ARMV8_DEPRECATED=y
+CONFIG_ASHMEM=y
+CONFIG_AUDIT=y
+CONFIG_BLK_DEV_DM=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_CGROUPS=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_CGROUP_DEBUG=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_SCHED=y
+CONFIG_CP15_BARRIER_EMULATION=y
+CONFIG_DM_CRYPT=y
+CONFIG_DM_VERITY=y
+CONFIG_DM_VERITY_FEC=y
+CONFIG_EMBEDDED=y
+CONFIG_FB=y
+CONFIG_HARDENED_USERCOPY=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_INET6_AH=y
+CONFIG_INET6_ESP=y
+CONFIG_INET6_IPCOMP=y
+CONFIG_INET=y
+CONFIG_INET_DIAG_DESTROY=y
+CONFIG_INET_ESP=y
+CONFIG_INET_XFRM_MODE_TUNNEL=y
+CONFIG_IP6_NF_FILTER=y
+CONFIG_IP6_NF_IPTABLES=y
+CONFIG_IP6_NF_MANGLE=y
+CONFIG_IP6_NF_RAW=y
+CONFIG_IP6_NF_TARGET_REJECT=y
+CONFIG_IPV6=y
+CONFIG_IPV6_MIP6=y
+CONFIG_IPV6_MULTIPLE_TABLES=y
+CONFIG_IPV6_OPTIMISTIC_DAD=y
+CONFIG_IPV6_PRIVACY=y
+CONFIG_IPV6_ROUTER_PREF=y
+CONFIG_IPV6_ROUTE_INFO=y
+CONFIG_IP_ADVANCED_ROUTER=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_MULTIPLE_TABLES=y
+CONFIG_IP_NF_ARPFILTER=y
+CONFIG_IP_NF_ARPTABLES=y
+CONFIG_IP_NF_ARP_MANGLE=y
+CONFIG_IP_NF_FILTER=y
+CONFIG_IP_NF_IPTABLES=y
+CONFIG_IP_NF_MANGLE=y
+CONFIG_IP_NF_MATCH_AH=y
+CONFIG_IP_NF_MATCH_ECN=y
+CONFIG_IP_NF_MATCH_TTL=y
+CONFIG_IP_NF_NAT=y
+CONFIG_IP_NF_RAW=y
+CONFIG_IP_NF_SECURITY=y
+CONFIG_IP_NF_TARGET_MASQUERADE=y
+CONFIG_IP_NF_TARGET_NETMAP=y
+CONFIG_IP_NF_TARGET_REDIRECT=y
+CONFIG_IP_NF_TARGET_REJECT=y
+CONFIG_NET=y
+CONFIG_NETDEVICES=y
+CONFIG_NETFILTER=y
+CONFIG_NETFILTER_TPROXY=y
+CONFIG_NETFILTER_XT_MATCH_COMMENT=y
+CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=y
+CONFIG_NETFILTER_XT_MATCH_CONNMARK=y
+CONFIG_NETFILTER_XT_MATCH_CONNTRACK=y
+CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=y
+CONFIG_NETFILTER_XT_MATCH_HELPER=y
+CONFIG_NETFILTER_XT_MATCH_IPRANGE=y
+CONFIG_NETFILTER_XT_MATCH_LENGTH=y
+CONFIG_NETFILTER_XT_MATCH_LIMIT=y
+CONFIG_NETFILTER_XT_MATCH_MAC=y
+CONFIG_NETFILTER_XT_MATCH_MARK=y
+CONFIG_NETFILTER_XT_MATCH_PKTTYPE=y
+CONFIG_NETFILTER_XT_MATCH_POLICY=y
+CONFIG_NETFILTER_XT_MATCH_QTAGUID=y
+CONFIG_NETFILTER_XT_MATCH_QUOTA2=y
+CONFIG_NETFILTER_XT_MATCH_QUOTA2_LOG=y
+CONFIG_NETFILTER_XT_MATCH_QUOTA=y
+CONFIG_NETFILTER_XT_MATCH_SOCKET=y
+CONFIG_NETFILTER_XT_MATCH_STATE=y
+CONFIG_NETFILTER_XT_MATCH_STATISTIC=y
+CONFIG_NETFILTER_XT_MATCH_STRING=y
+CONFIG_NETFILTER_XT_MATCH_TIME=y
+CONFIG_NETFILTER_XT_MATCH_U32=y
+CONFIG_NETFILTER_XT_TARGET_CLASSIFY=y
+CONFIG_NETFILTER_XT_TARGET_CONNMARK=y
+CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=y
+CONFIG_NETFILTER_XT_TARGET_IDLETIMER=y
+CONFIG_NETFILTER_XT_TARGET_MARK=y
+CONFIG_NETFILTER_XT_TARGET_NFLOG=y
+CONFIG_NETFILTER_XT_TARGET_NFQUEUE=y
+CONFIG_NETFILTER_XT_TARGET_SECMARK=y
+CONFIG_NETFILTER_XT_TARGET_TCPMSS=y
+CONFIG_NETFILTER_XT_TARGET_TPROXY=y
+CONFIG_NETFILTER_XT_TARGET_TRACE=y
+CONFIG_NET_CLS_ACT=y
+CONFIG_NET_CLS_U32=y
+CONFIG_NET_EMATCH=y
+CONFIG_NET_EMATCH_U32=y
+CONFIG_NET_KEY=y
+CONFIG_NET_SCHED=y
+CONFIG_NET_SCH_HTB=y
+CONFIG_NF_CONNTRACK=y
+CONFIG_NF_CONNTRACK_AMANDA=y
+CONFIG_NF_CONNTRACK_EVENTS=y
+CONFIG_NF_CONNTRACK_FTP=y
+CONFIG_NF_CONNTRACK_H323=y
+CONFIG_NF_CONNTRACK_IPV4=y
+CONFIG_NF_CONNTRACK_IPV6=y
+CONFIG_NF_CONNTRACK_IRC=y
+CONFIG_NF_CONNTRACK_NETBIOS_NS=y
+CONFIG_NF_CONNTRACK_PPTP=y
+CONFIG_NF_CONNTRACK_SANE=y
+CONFIG_NF_CONNTRACK_SECMARK=y
+CONFIG_NF_CONNTRACK_TFTP=y
+CONFIG_NF_CT_NETLINK=y
+CONFIG_NF_CT_PROTO_DCCP=y
+CONFIG_NF_CT_PROTO_SCTP=y
+CONFIG_NF_CT_PROTO_UDPLITE=y
+CONFIG_NF_NAT=y
+CONFIG_NO_HZ=y
+CONFIG_PACKET=y
+CONFIG_PM_AUTOSLEEP=y
+CONFIG_PM_WAKELOCKS=y
+CONFIG_PPP=y
+CONFIG_PPPOLAC=y
+CONFIG_PPPOPNS=y
+CONFIG_PPP_BSDCOMP=y
+CONFIG_PPP_DEFLATE=y
+CONFIG_PPP_MPPE=y
+CONFIG_PREEMPT=y
+CONFIG_PROFILING=y
+CONFIG_QFMT_V2=y
+CONFIG_QUOTA=y
+CONFIG_QUOTA_NETLINK_INTERFACE=y
+CONFIG_QUOTA_TREE=y
+CONFIG_QUOTACTL=y
+CONFIG_RANDOMIZE_BASE=y
+CONFIG_RTC_CLASS=y
+CONFIG_RT_GROUP_SCHED=y
+CONFIG_SECCOMP=y
+CONFIG_SECURITY=y
+CONFIG_SECURITY_NETWORK=y
+CONFIG_SECURITY_PERF_EVENTS_RESTRICT=y
+CONFIG_SECURITY_SELINUX=y
+CONFIG_SETEND_EMULATION=y
+CONFIG_STAGING=y
+CONFIG_SWP_EMULATION=y
+CONFIG_SYNC=y
+CONFIG_TUN=y
+CONFIG_UID_CPUTIME=y
+CONFIG_UNIX=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_CONFIGFS=y
+CONFIG_USB_CONFIGFS_F_FS=y
+CONFIG_USB_CONFIGFS_F_MTP=y
+CONFIG_USB_CONFIGFS_F_PTP=y
+CONFIG_USB_CONFIGFS_F_ACC=y
+CONFIG_USB_CONFIGFS_F_AUDIO_SRC=y
+CONFIG_USB_CONFIGFS_UEVENT=y
+CONFIG_USB_CONFIGFS_F_MIDI=y
+CONFIG_USB_OTG_WAKELOCK=y
+CONFIG_XFRM_USER=y
diff --git a/android/configs/android-recommended.cfg b/android/configs/android-recommended.cfg
new file mode 100644
index 000000000000..70aaae17ad29
--- /dev/null
+++ b/android/configs/android-recommended.cfg
@@ -0,0 +1,129 @@
+# KEEP ALPHABETICALLY SORTED
+# CONFIG_AIO is not set
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_NF_CONNTRACK_SIP is not set
+# CONFIG_PM_WAKELOCKS_GC is not set
+# CONFIG_VT is not set
+CONFIG_ANDROID_TIMED_GPIO=y
+CONFIG_ARM_KERNMEM_PERMS=y
+CONFIG_ARM64_SW_TTBR0_PAN=y
+CONFIG_BACKLIGHT_LCD_SUPPORT=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_SIZE=8192
+CONFIG_CC_STACKPROTECTOR_STRONG=y
+CONFIG_COMPACTION=y
+CONFIG_DEBUG_RODATA=y
+CONFIG_DM_UEVENT=y
+CONFIG_DRAGONRISE_FF=y
+CONFIG_ENABLE_DEFAULT_TRACERS=y
+CONFIG_EXT4_FS=y
+CONFIG_EXT4_FS_SECURITY=y
+CONFIG_FUSE_FS=y
+CONFIG_GREENASIA_FF=y
+CONFIG_HIDRAW=y
+CONFIG_HID_A4TECH=y
+CONFIG_HID_ACRUX=y
+CONFIG_HID_ACRUX_FF=y
+CONFIG_HID_APPLE=y
+CONFIG_HID_BELKIN=y
+CONFIG_HID_CHERRY=y
+CONFIG_HID_CHICONY=y
+CONFIG_HID_CYPRESS=y
+CONFIG_HID_DRAGONRISE=y
+CONFIG_HID_ELECOM=y
+CONFIG_HID_EMS_FF=y
+CONFIG_HID_EZKEY=y
+CONFIG_HID_GREENASIA=y
+CONFIG_HID_GYRATION=y
+CONFIG_HID_HOLTEK=y
+CONFIG_HID_KENSINGTON=y
+CONFIG_HID_KEYTOUCH=y
+CONFIG_HID_KYE=y
+CONFIG_HID_LCPOWER=y
+CONFIG_HID_LOGITECH=y
+CONFIG_HID_LOGITECH_DJ=y
+CONFIG_HID_MAGICMOUSE=y
+CONFIG_HID_MICROSOFT=y
+CONFIG_HID_MONTEREY=y
+CONFIG_HID_MULTITOUCH=y
+CONFIG_HID_NTRIG=y
+CONFIG_HID_ORTEK=y
+CONFIG_HID_PANTHERLORD=y
+CONFIG_HID_PETALYNX=y
+CONFIG_HID_PICOLCD=y
+CONFIG_HID_PRIMAX=y
+CONFIG_HID_PRODIKEYS=y
+CONFIG_HID_ROCCAT=y
+CONFIG_HID_SAITEK=y
+CONFIG_HID_SAMSUNG=y
+CONFIG_HID_SMARTJOYPLUS=y
+CONFIG_HID_SONY=y
+CONFIG_HID_SPEEDLINK=y
+CONFIG_HID_SUNPLUS=y
+CONFIG_HID_THRUSTMASTER=y
+CONFIG_HID_TIVO=y
+CONFIG_HID_TOPSEED=y
+CONFIG_HID_TWINHAN=y
+CONFIG_HID_UCLOGIC=y
+CONFIG_HID_WACOM=y
+CONFIG_HID_WALTOP=y
+CONFIG_HID_WIIMOTE=y
+CONFIG_HID_ZEROPLUS=y
+CONFIG_HID_ZYDACRON=y
+CONFIG_INPUT_EVDEV=y
+CONFIG_INPUT_GPIO=y
+CONFIG_INPUT_JOYSTICK=y
+CONFIG_INPUT_KEYCHORD=y
+CONFIG_INPUT_KEYRESET=y
+CONFIG_INPUT_MISC=y
+CONFIG_INPUT_TABLET=y
+CONFIG_INPUT_UINPUT=y
+CONFIG_ION=y
+CONFIG_JOYSTICK_XPAD=y
+CONFIG_JOYSTICK_XPAD_FF=y
+CONFIG_JOYSTICK_XPAD_LEDS=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_KSM=y
+CONFIG_LOGIG940_FF=y
+CONFIG_LOGIRUMBLEPAD2_FF=y
+CONFIG_LOGITECH_FF=y
+CONFIG_MD=y
+CONFIG_MEDIA_SUPPORT=y
+CONFIG_MSDOS_FS=y
+CONFIG_PANIC_TIMEOUT=5
+CONFIG_PANTHERLORD_FF=y
+CONFIG_PERF_EVENTS=y
+CONFIG_PM_DEBUG=y
+CONFIG_PM_RUNTIME=y
+CONFIG_PM_WAKELOCKS_LIMIT=0
+CONFIG_POWER_SUPPLY=y
+CONFIG_PSTORE=y
+CONFIG_PSTORE_CONSOLE=y
+CONFIG_PSTORE_RAM=y
+CONFIG_SCHEDSTATS=y
+CONFIG_SMARTJOYPLUS_FF=y
+CONFIG_SND=y
+CONFIG_SOUND=y
+CONFIG_SUSPEND_TIME=y
+CONFIG_TABLET_USB_ACECAD=y
+CONFIG_TABLET_USB_AIPTEK=y
+CONFIG_TABLET_USB_GTCO=y
+CONFIG_TABLET_USB_HANWANG=y
+CONFIG_TABLET_USB_KBTAB=y
+CONFIG_TASKSTATS=y
+CONFIG_TASK_DELAY_ACCT=y
+CONFIG_TASK_IO_ACCOUNTING=y
+CONFIG_TASK_XACCT=y
+CONFIG_TIMER_STATS=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_UHID=y
+CONFIG_MEMORY_STATE_TIME=y
+CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_HIDDEV=y
+CONFIG_USB_USBNET=y
+CONFIG_VFAT_FS=y
diff --git a/arch/Kconfig b/arch/Kconfig
index d4d9845530f1..98f64ad1caf1 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -527,6 +527,74 @@ config HAVE_COPY_THREAD_TLS
normal C parameter passing, rather than extracting the syscall
argument from pt_regs.
+config HAVE_ARCH_MMAP_RND_BITS
+ bool
+ help
+ An arch should select this symbol if it supports setting a variable
+ number of bits for use in establishing the base address for mmap
+ allocations, has MMU enabled and provides values for both:
+ - ARCH_MMAP_RND_BITS_MIN
+ - ARCH_MMAP_RND_BITS_MAX
+
+config ARCH_MMAP_RND_BITS_MIN
+ int
+
+config ARCH_MMAP_RND_BITS_MAX
+ int
+
+config ARCH_MMAP_RND_BITS_DEFAULT
+ int
+
+config ARCH_MMAP_RND_BITS
+ int "Number of bits to use for ASLR of mmap base address" if EXPERT
+ range ARCH_MMAP_RND_BITS_MIN ARCH_MMAP_RND_BITS_MAX
+ default ARCH_MMAP_RND_BITS_DEFAULT if ARCH_MMAP_RND_BITS_DEFAULT
+ default ARCH_MMAP_RND_BITS_MIN
+ depends on HAVE_ARCH_MMAP_RND_BITS
+ help
+ This value can be used to select the number of bits to use to
+ determine the random offset to the base address of vma regions
+ resulting from mmap allocations. This value will be bounded
+ by the architecture's minimum and maximum supported values.
+
+ This value can be changed after boot using the
+ /proc/sys/vm/mmap_rnd_bits tunable
+
+config HAVE_ARCH_MMAP_RND_COMPAT_BITS
+ bool
+ help
+ An arch should select this symbol if it supports running applications
+ in compatibility mode, supports setting a variable number of bits for
+ use in establishing the base address for mmap allocations, has MMU
+ enabled and provides values for both:
+ - ARCH_MMAP_RND_COMPAT_BITS_MIN
+ - ARCH_MMAP_RND_COMPAT_BITS_MAX
+
+config ARCH_MMAP_RND_COMPAT_BITS_MIN
+ int
+
+config ARCH_MMAP_RND_COMPAT_BITS_MAX
+ int
+
+config ARCH_MMAP_RND_COMPAT_BITS_DEFAULT
+ int
+
+config ARCH_MMAP_RND_COMPAT_BITS
+ int "Number of bits to use for ASLR of mmap base address for compatible applications" if EXPERT
+ range ARCH_MMAP_RND_COMPAT_BITS_MIN ARCH_MMAP_RND_COMPAT_BITS_MAX
+ default ARCH_MMAP_RND_COMPAT_BITS_DEFAULT if ARCH_MMAP_RND_COMPAT_BITS_DEFAULT
+ default ARCH_MMAP_RND_COMPAT_BITS_MIN
+ depends on HAVE_ARCH_MMAP_RND_COMPAT_BITS
+ help
+ This value can be used to select the number of bits to use to
+ determine the random offset to the base address of vma regions
+ resulting from mmap allocations for compatible applications This
+ value will be bounded by the architecture's minimum and maximum
+ supported values.
+
+ This value can be changed after boot using the
+ /proc/sys/vm/mmap_rnd_compat_bits tunable
+
#
# ABI hall of shame
#
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 9049ac023bee..625765fb805a 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -35,6 +35,7 @@ config ARM
select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32
select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32
+ select HAVE_ARCH_MMAP_RND_BITS if MMU
select HAVE_ARCH_HARDENED_USERCOPY
select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
select HAVE_ARCH_TRACEHOOK
@@ -310,6 +311,14 @@ config MMU
Select if you want MMU-based virtualised addressing space
support by paged memory management. If unsure, say 'Y'.
+config ARCH_MMAP_RND_BITS_MIN
+ default 8
+
+config ARCH_MMAP_RND_BITS_MAX
+ default 14 if PAGE_OFFSET=0x40000000
+ default 15 if PAGE_OFFSET=0x80000000
+ default 16
+
#
# The "ARM system type" choice list is ordered alphabetically by option
# text. Please add new entries in the option alphabetic order.
@@ -1817,6 +1826,15 @@ config XEN
help
Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
+config ARM_FLUSH_CONSOLE_ON_RESTART
+ bool "Force flush the console on restart"
+ help
+ If the console is locked while the system is rebooted, the messages
+ in the temporary logbuffer would not have propogated to all the
+ console drivers. This option forces the console lock to be
+ released if it failed to be acquired, which will cause all the
+ pending messages to be flushed.
+
endmenu
menu "Boot options"
@@ -1845,6 +1863,21 @@ config DEPRECATED_PARAM_STRUCT
This was deprecated in 2001 and announced to live on for 5 years.
Some old boot loaders still use this way.
+config BUILD_ARM_APPENDED_DTB_IMAGE
+ bool "Build a concatenated zImage/dtb by default"
+ depends on OF
+ help
+ Enabling this option will cause a concatenated zImage and list of
+ DTBs to be built by default (instead of a standalone zImage.)
+ The image will built in arch/arm/boot/zImage-dtb
+
+config BUILD_ARM_APPENDED_DTB_IMAGE_NAMES
+ string "Default dtb names"
+ depends on BUILD_ARM_APPENDED_DTB_IMAGE
+ help
+ Space separated list of names of dtbs to append when
+ building a concatenated zImage-dtb.
+
# Compressed boot loader in ROM. Yes, we really want to ask about
# TEXT and BSS so we preserve their values in the config files.
config ZBOOT_ROM_TEXT
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index ddbb361267d8..f08e4fd600a3 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -1618,6 +1618,14 @@ config EARLY_PRINTK
kernel low-level debugging functions. Add earlyprintk to your
kernel parameters to enable this console.
+config EARLY_PRINTK_DIRECT
+ bool "Early printk direct"
+ depends on DEBUG_LL
+ help
+ Say Y here if you want to have an early console using the
+ kernel low-level debugging functions and EARLY_PRINTK is
+ not early enough.
+
config ARM_KPROBES_TEST
tristate "Kprobes test module"
depends on KPROBES && MODULES
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 2c2b28ee4811..88e479c8bcef 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -296,6 +296,8 @@ libs-y := arch/arm/lib/ $(libs-y)
# Default target when executing plain make
ifeq ($(CONFIG_XIP_KERNEL),y)
KBUILD_IMAGE := xipImage
+else ifeq ($(CONFIG_BUILD_ARM_APPENDED_DTB_IMAGE),y)
+KBUILD_IMAGE := zImage-dtb
else
KBUILD_IMAGE := zImage
endif
@@ -346,6 +348,9 @@ ifeq ($(CONFIG_VDSO),y)
$(Q)$(MAKE) $(build)=arch/arm/vdso $@
endif
+zImage-dtb: vmlinux scripts dtbs
+ $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
+
# We use MRPROPER_FILES and CLEAN_FILES now
archclean:
$(Q)$(MAKE) $(clean)=$(boot)
diff --git a/arch/arm/boot/.gitignore b/arch/arm/boot/.gitignore
index 3c79f85975aa..ad7a0253ea96 100644
--- a/arch/arm/boot/.gitignore
+++ b/arch/arm/boot/.gitignore
@@ -4,3 +4,4 @@ xipImage
bootpImage
uImage
*.dtb
+zImage-dtb \ No newline at end of file
diff --git a/arch/arm/boot/Makefile b/arch/arm/boot/Makefile
index 9eca7aee927f..4a04ed3daf97 100644
--- a/arch/arm/boot/Makefile
+++ b/arch/arm/boot/Makefile
@@ -14,6 +14,7 @@
ifneq ($(MACHINE),)
include $(MACHINE)/Makefile.boot
endif
+include $(srctree)/arch/arm/boot/dts/Makefile
# Note: the following conditions must always be true:
# ZRELADDR == virt_to_phys(PAGE_OFFSET + TEXT_OFFSET)
@@ -27,6 +28,14 @@ export ZRELADDR INITRD_PHYS PARAMS_PHYS
targets := Image zImage xipImage bootpImage uImage
+DTB_NAMES := $(subst $\",,$(CONFIG_BUILD_ARM_APPENDED_DTB_IMAGE_NAMES))
+ifneq ($(DTB_NAMES),)
+DTB_LIST := $(addsuffix .dtb,$(DTB_NAMES))
+else
+DTB_LIST := $(dtb-y)
+endif
+DTB_OBJS := $(addprefix $(obj)/dts/,$(DTB_LIST))
+
ifeq ($(CONFIG_XIP_KERNEL),y)
$(obj)/xipImage: vmlinux FORCE
@@ -55,6 +64,10 @@ $(obj)/zImage: $(obj)/compressed/vmlinux FORCE
$(call if_changed,objcopy)
@$(kecho) ' Kernel: $@ is ready'
+$(obj)/zImage-dtb: $(obj)/zImage $(DTB_OBJS) FORCE
+ $(call if_changed,cat)
+ @echo ' Kernel: $@ is ready'
+
endif
ifneq ($(LOADADDR),)
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index 856913705169..d2e43b053d9b 100644
--- a/arch/arm/boot/compressed/head.S
+++ b/arch/arm/boot/compressed/head.S
@@ -778,6 +778,8 @@ __armv7_mmu_cache_on:
bic r6, r6, #1 << 31 @ 32-bit translation system
bic r6, r6, #(7 << 0) | (1 << 4) @ use only ttbr0
mcrne p15, 0, r3, c2, c0, 0 @ load page table pointer
+ mcrne p15, 0, r0, c8, c7, 0 @ flush I,D TLBs
+ mcr p15, 0, r0, c7, c5, 4 @ ISB
mcrne p15, 0, r1, c3, c0, 0 @ load domain access control
mcrne p15, 0, r6, c2, c0, 2 @ load ttb control
#endif
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 30bbc3746130..97d1b3719c75 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -782,5 +782,15 @@ endif
dtstree := $(srctree)/$(src)
dtb-$(CONFIG_OF_ALL_DTBS) := $(patsubst $(dtstree)/%.dts,%.dtb, $(wildcard $(dtstree)/*.dts))
-always := $(dtb-y)
+DTB_NAMES := $(subst $\",,$(CONFIG_BUILD_ARM_APPENDED_DTB_IMAGE_NAMES))
+ifneq ($(DTB_NAMES),)
+DTB_LIST := $(addsuffix .dtb,$(DTB_NAMES))
+else
+DTB_LIST := $(dtb-y)
+endif
+
+targets += dtbs dtbs_install
+targets += $(DTB_LIST)
+
+always := $(DTB_LIST)
clean-files := *.dtb
diff --git a/arch/arm/common/Kconfig b/arch/arm/common/Kconfig
index 9353184d730d..ce01364a96e3 100644
--- a/arch/arm/common/Kconfig
+++ b/arch/arm/common/Kconfig
@@ -17,3 +17,7 @@ config SHARP_PARAM
config SHARP_SCOOP
bool
+
+config FIQ_GLUE
+ bool
+ select FIQ
diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile
index 27f23b15b1ea..04aca896b338 100644
--- a/arch/arm/common/Makefile
+++ b/arch/arm/common/Makefile
@@ -4,6 +4,7 @@
obj-y += firmware.o
+obj-$(CONFIG_FIQ_GLUE) += fiq_glue.o fiq_glue_setup.o
obj-$(CONFIG_ICST) += icst.o
obj-$(CONFIG_SA1111) += sa1111.o
obj-$(CONFIG_DMABOUNCE) += dmabounce.o
diff --git a/arch/arm/common/fiq_glue.S b/arch/arm/common/fiq_glue.S
new file mode 100644
index 000000000000..24b42cec4813
--- /dev/null
+++ b/arch/arm/common/fiq_glue.S
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+ .text
+
+ .global fiq_glue_end
+
+ /* fiq stack: r0-r15,cpsr,spsr of interrupted mode */
+
+ENTRY(fiq_glue)
+ /* store pc, cpsr from previous mode, reserve space for spsr */
+ mrs r12, spsr
+ sub lr, lr, #4
+ subs r10, #1
+ bne nested_fiq
+
+ str r12, [sp, #-8]!
+ str lr, [sp, #-4]!
+
+ /* store r8-r14 from previous mode */
+ sub sp, sp, #(7 * 4)
+ stmia sp, {r8-r14}^
+ nop
+
+ /* store r0-r7 from previous mode */
+ stmfd sp!, {r0-r7}
+
+ /* setup func(data,regs) arguments */
+ mov r0, r9
+ mov r1, sp
+ mov r3, r8
+
+ mov r7, sp
+
+ /* Get sp and lr from non-user modes */
+ and r4, r12, #MODE_MASK
+ cmp r4, #USR_MODE
+ beq fiq_from_usr_mode
+
+ mov r7, sp
+ orr r4, r4, #(PSR_I_BIT | PSR_F_BIT)
+ msr cpsr_c, r4
+ str sp, [r7, #(4 * 13)]
+ str lr, [r7, #(4 * 14)]
+ mrs r5, spsr
+ str r5, [r7, #(4 * 17)]
+
+ cmp r4, #(SVC_MODE | PSR_I_BIT | PSR_F_BIT)
+ /* use fiq stack if we reenter this mode */
+ subne sp, r7, #(4 * 3)
+
+fiq_from_usr_mode:
+ msr cpsr_c, #(SVC_MODE | PSR_I_BIT | PSR_F_BIT)
+ mov r2, sp
+ sub sp, r7, #12
+ stmfd sp!, {r2, ip, lr}
+ /* call func(data,regs) */
+ blx r3
+ ldmfd sp, {r2, ip, lr}
+ mov sp, r2
+
+ /* restore/discard saved state */
+ cmp r4, #USR_MODE
+ beq fiq_from_usr_mode_exit
+
+ msr cpsr_c, r4
+ ldr sp, [r7, #(4 * 13)]
+ ldr lr, [r7, #(4 * 14)]
+ msr spsr_cxsf, r5
+
+fiq_from_usr_mode_exit:
+ msr cpsr_c, #(FIQ_MODE | PSR_I_BIT | PSR_F_BIT)
+
+ ldmfd sp!, {r0-r7}
+ ldr lr, [sp, #(4 * 7)]
+ ldr r12, [sp, #(4 * 8)]
+ add sp, sp, #(10 * 4)
+exit_fiq:
+ msr spsr_cxsf, r12
+ add r10, #1
+ cmp r11, #0
+ moveqs pc, lr
+ bx r11 /* jump to custom fiq return function */
+
+nested_fiq:
+ orr r12, r12, #(PSR_F_BIT)
+ b exit_fiq
+
+fiq_glue_end:
+
+ENTRY(fiq_glue_setup) /* func, data, sp, smc call number */
+ stmfd sp!, {r4}
+ mrs r4, cpsr
+ msr cpsr_c, #(FIQ_MODE | PSR_I_BIT | PSR_F_BIT)
+ movs r8, r0
+ mov r9, r1
+ mov sp, r2
+ mov r11, r3
+ moveq r10, #0
+ movne r10, #1
+ msr cpsr_c, r4
+ ldmfd sp!, {r4}
+ bx lr
+
diff --git a/arch/arm/common/fiq_glue_setup.c b/arch/arm/common/fiq_glue_setup.c
new file mode 100644
index 000000000000..8cb1b611c6d5
--- /dev/null
+++ b/arch/arm/common/fiq_glue_setup.c
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/percpu.h>
+#include <linux/slab.h>
+#include <asm/fiq.h>
+#include <asm/fiq_glue.h>
+
+extern unsigned char fiq_glue, fiq_glue_end;
+extern void fiq_glue_setup(void *func, void *data, void *sp,
+ fiq_return_handler_t fiq_return_handler);
+
+static struct fiq_handler fiq_debbuger_fiq_handler = {
+ .name = "fiq_glue",
+};
+DEFINE_PER_CPU(void *, fiq_stack);
+static struct fiq_glue_handler *current_handler;
+static fiq_return_handler_t fiq_return_handler;
+static DEFINE_MUTEX(fiq_glue_lock);
+
+static void fiq_glue_setup_helper(void *info)
+{
+ struct fiq_glue_handler *handler = info;
+ fiq_glue_setup(handler->fiq, handler,
+ __get_cpu_var(fiq_stack) + THREAD_START_SP,
+ fiq_return_handler);
+}
+
+int fiq_glue_register_handler(struct fiq_glue_handler *handler)
+{
+ int ret;
+ int cpu;
+
+ if (!handler || !handler->fiq)
+ return -EINVAL;
+
+ mutex_lock(&fiq_glue_lock);
+ if (fiq_stack) {
+ ret = -EBUSY;
+ goto err_busy;
+ }
+
+ for_each_possible_cpu(cpu) {
+ void *stack;
+ stack = (void *)__get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER);
+ if (WARN_ON(!stack)) {
+ ret = -ENOMEM;
+ goto err_alloc_fiq_stack;
+ }
+ per_cpu(fiq_stack, cpu) = stack;
+ }
+
+ ret = claim_fiq(&fiq_debbuger_fiq_handler);
+ if (WARN_ON(ret))
+ goto err_claim_fiq;
+
+ current_handler = handler;
+ on_each_cpu(fiq_glue_setup_helper, handler, true);
+ set_fiq_handler(&fiq_glue, &fiq_glue_end - &fiq_glue);
+
+ mutex_unlock(&fiq_glue_lock);
+ return 0;
+
+err_claim_fiq:
+err_alloc_fiq_stack:
+ for_each_possible_cpu(cpu) {
+ __free_pages(per_cpu(fiq_stack, cpu), THREAD_SIZE_ORDER);
+ per_cpu(fiq_stack, cpu) = NULL;
+ }
+err_busy:
+ mutex_unlock(&fiq_glue_lock);
+ return ret;
+}
+
+static void fiq_glue_update_return_handler(void (*fiq_return)(void))
+{
+ fiq_return_handler = fiq_return;
+ if (current_handler)
+ on_each_cpu(fiq_glue_setup_helper, current_handler, true);
+}
+
+int fiq_glue_set_return_handler(void (*fiq_return)(void))
+{
+ int ret;
+
+ mutex_lock(&fiq_glue_lock);
+ if (fiq_return_handler) {
+ ret = -EBUSY;
+ goto err_busy;
+ }
+ fiq_glue_update_return_handler(fiq_return);
+ ret = 0;
+err_busy:
+ mutex_unlock(&fiq_glue_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(fiq_glue_set_return_handler);
+
+int fiq_glue_clear_return_handler(void (*fiq_return)(void))
+{
+ int ret;
+
+ mutex_lock(&fiq_glue_lock);
+ if (WARN_ON(fiq_return_handler != fiq_return)) {
+ ret = -EINVAL;
+ goto err_inval;
+ }
+ fiq_glue_update_return_handler(NULL);
+ ret = 0;
+err_inval:
+ mutex_unlock(&fiq_glue_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(fiq_glue_clear_return_handler);
+
+/**
+ * fiq_glue_resume - Restore fiqs after suspend or low power idle states
+ *
+ * This must be called before calling local_fiq_enable after returning from a
+ * power state where the fiq mode registers were lost. If a driver provided
+ * a resume hook when it registered the handler it will be called.
+ */
+
+void fiq_glue_resume(void)
+{
+ if (!current_handler)
+ return;
+ fiq_glue_setup(current_handler->fiq, current_handler,
+ __get_cpu_var(fiq_stack) + THREAD_START_SP,
+ fiq_return_handler);
+ if (current_handler->resume)
+ current_handler->resume(current_handler);
+}
+
diff --git a/arch/arm/configs/ranchu_defconfig b/arch/arm/configs/ranchu_defconfig
new file mode 100644
index 000000000000..49e7bbd5825a
--- /dev/null
+++ b/arch/arm/configs/ranchu_defconfig
@@ -0,0 +1,316 @@
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_AUDIT=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_TASKSTATS=y
+CONFIG_TASK_DELAY_ACCT=y
+CONFIG_TASK_XACCT=y
+CONFIG_TASK_IO_ACCOUNTING=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_CGROUPS=y
+CONFIG_CGROUP_DEBUG=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CPUSETS=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_CGROUP_SCHED=y
+CONFIG_RT_GROUP_SCHED=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_EMBEDDED=y
+CONFIG_PROFILING=y
+CONFIG_OPROFILE=y
+CONFIG_ARCH_MMAP_RND_BITS=16
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+# CONFIG_IOSCHED_CFQ is not set
+CONFIG_ARCH_VIRT=y
+CONFIG_ARM_KERNMEM_PERMS=y
+CONFIG_SMP=y
+CONFIG_PREEMPT=y
+CONFIG_AEABI=y
+CONFIG_HIGHMEM=y
+CONFIG_KSM=y
+CONFIG_SECCOMP=y
+CONFIG_CMDLINE="console=ttyAMA0"
+CONFIG_VFP=y
+CONFIG_NEON=y
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+CONFIG_PM_AUTOSLEEP=y
+CONFIG_PM_WAKELOCKS=y
+CONFIG_PM_WAKELOCKS_LIMIT=0
+# CONFIG_PM_WAKELOCKS_GC is not set
+CONFIG_PM_DEBUG=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_XFRM_USER=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+CONFIG_INET_DIAG_DESTROY=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_ADVANCED_ROUTER=y
+CONFIG_IP_MULTIPLE_TABLES=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_INET_ESP=y
+# CONFIG_INET_LRO is not set
+CONFIG_IPV6_ROUTER_PREF=y
+CONFIG_IPV6_ROUTE_INFO=y
+CONFIG_IPV6_OPTIMISTIC_DAD=y
+CONFIG_INET6_AH=y
+CONFIG_INET6_ESP=y
+CONFIG_INET6_IPCOMP=y
+CONFIG_IPV6_MIP6=y
+CONFIG_IPV6_MULTIPLE_TABLES=y
+CONFIG_NETFILTER=y
+CONFIG_NF_CONNTRACK=y
+CONFIG_NF_CONNTRACK_SECMARK=y
+CONFIG_NF_CONNTRACK_EVENTS=y
+CONFIG_NF_CT_PROTO_DCCP=y
+CONFIG_NF_CT_PROTO_SCTP=y
+CONFIG_NF_CT_PROTO_UDPLITE=y
+CONFIG_NF_CONNTRACK_AMANDA=y
+CONFIG_NF_CONNTRACK_FTP=y
+CONFIG_NF_CONNTRACK_H323=y
+CONFIG_NF_CONNTRACK_IRC=y
+CONFIG_NF_CONNTRACK_NETBIOS_NS=y
+CONFIG_NF_CONNTRACK_PPTP=y
+CONFIG_NF_CONNTRACK_SANE=y
+CONFIG_NF_CONNTRACK_TFTP=y
+CONFIG_NF_CT_NETLINK=y
+CONFIG_NETFILTER_XT_TARGET_CLASSIFY=y
+CONFIG_NETFILTER_XT_TARGET_CONNMARK=y
+CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=y
+CONFIG_NETFILTER_XT_TARGET_IDLETIMER=y
+CONFIG_NETFILTER_XT_TARGET_MARK=y
+CONFIG_NETFILTER_XT_TARGET_NFLOG=y
+CONFIG_NETFILTER_XT_TARGET_NFQUEUE=y
+CONFIG_NETFILTER_XT_TARGET_TPROXY=y
+CONFIG_NETFILTER_XT_TARGET_TRACE=y
+CONFIG_NETFILTER_XT_TARGET_SECMARK=y
+CONFIG_NETFILTER_XT_TARGET_TCPMSS=y
+CONFIG_NETFILTER_XT_MATCH_COMMENT=y
+CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=y
+CONFIG_NETFILTER_XT_MATCH_CONNMARK=y
+CONFIG_NETFILTER_XT_MATCH_CONNTRACK=y
+CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=y
+CONFIG_NETFILTER_XT_MATCH_HELPER=y
+CONFIG_NETFILTER_XT_MATCH_IPRANGE=y
+CONFIG_NETFILTER_XT_MATCH_LENGTH=y
+CONFIG_NETFILTER_XT_MATCH_LIMIT=y
+CONFIG_NETFILTER_XT_MATCH_MAC=y
+CONFIG_NETFILTER_XT_MATCH_MARK=y
+CONFIG_NETFILTER_XT_MATCH_POLICY=y
+CONFIG_NETFILTER_XT_MATCH_PKTTYPE=y
+CONFIG_NETFILTER_XT_MATCH_QTAGUID=y
+CONFIG_NETFILTER_XT_MATCH_QUOTA=y
+CONFIG_NETFILTER_XT_MATCH_QUOTA2=y
+CONFIG_NETFILTER_XT_MATCH_SOCKET=y
+CONFIG_NETFILTER_XT_MATCH_STATE=y
+CONFIG_NETFILTER_XT_MATCH_STATISTIC=y
+CONFIG_NETFILTER_XT_MATCH_STRING=y
+CONFIG_NETFILTER_XT_MATCH_TIME=y
+CONFIG_NETFILTER_XT_MATCH_U32=y
+CONFIG_NF_CONNTRACK_IPV4=y
+CONFIG_IP_NF_IPTABLES=y
+CONFIG_IP_NF_MATCH_AH=y
+CONFIG_IP_NF_MATCH_ECN=y
+CONFIG_IP_NF_MATCH_TTL=y
+CONFIG_IP_NF_FILTER=y
+CONFIG_IP_NF_TARGET_REJECT=y
+CONFIG_IP_NF_MANGLE=y
+CONFIG_IP_NF_RAW=y
+CONFIG_IP_NF_SECURITY=y
+CONFIG_IP_NF_ARPTABLES=y
+CONFIG_IP_NF_ARPFILTER=y
+CONFIG_IP_NF_ARP_MANGLE=y
+CONFIG_NF_CONNTRACK_IPV6=y
+CONFIG_IP6_NF_IPTABLES=y
+CONFIG_IP6_NF_FILTER=y
+CONFIG_IP6_NF_TARGET_REJECT=y
+CONFIG_IP6_NF_MANGLE=y
+CONFIG_IP6_NF_RAW=y
+CONFIG_BRIDGE=y
+CONFIG_NET_SCHED=y
+CONFIG_NET_SCH_HTB=y
+CONFIG_NET_CLS_U32=y
+CONFIG_NET_EMATCH=y
+CONFIG_NET_EMATCH_U32=y
+CONFIG_NET_CLS_ACT=y
+# CONFIG_WIRELESS is not set
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_MTD=y
+CONFIG_MTD_CMDLINE_PARTS=y
+CONFIG_MTD_BLOCK=y
+CONFIG_MTD_CFI=y
+CONFIG_MTD_CFI_INTELEXT=y
+CONFIG_MTD_CFI_AMDSTD=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_SIZE=8192
+CONFIG_VIRTIO_BLK=y
+CONFIG_MD=y
+CONFIG_BLK_DEV_DM=y
+CONFIG_DM_CRYPT=y
+CONFIG_DM_UEVENT=y
+CONFIG_DM_VERITY=y
+CONFIG_DM_VERITY_FEC=y
+CONFIG_NETDEVICES=y
+CONFIG_TUN=y
+CONFIG_VIRTIO_NET=y
+CONFIG_SMSC911X=y
+CONFIG_PPP=y
+CONFIG_PPP_BSDCOMP=y
+CONFIG_PPP_DEFLATE=y
+CONFIG_PPP_MPPE=y
+CONFIG_PPPOLAC=y
+CONFIG_PPPOPNS=y
+CONFIG_USB_USBNET=y
+# CONFIG_WLAN is not set
+CONFIG_INPUT_EVDEV=y
+CONFIG_INPUT_KEYRESET=y
+CONFIG_KEYBOARD_GOLDFISH_EVENTS=y
+# CONFIG_INPUT_MOUSE is not set
+CONFIG_INPUT_JOYSTICK=y
+CONFIG_JOYSTICK_XPAD=y
+CONFIG_JOYSTICK_XPAD_FF=y
+CONFIG_JOYSTICK_XPAD_LEDS=y
+CONFIG_INPUT_TABLET=y
+CONFIG_TABLET_USB_ACECAD=y
+CONFIG_TABLET_USB_AIPTEK=y
+CONFIG_TABLET_USB_GTCO=y
+CONFIG_TABLET_USB_HANWANG=y
+CONFIG_TABLET_USB_KBTAB=y
+CONFIG_INPUT_MISC=y
+CONFIG_INPUT_KEYCHORD=y
+CONFIG_INPUT_UINPUT=y
+CONFIG_INPUT_GPIO=y
+# CONFIG_SERIO_SERPORT is not set
+CONFIG_SERIO_AMBAKMI=y
+# CONFIG_VT is not set
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_DEVMEM is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_AMBA_PL011=y
+CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
+CONFIG_VIRTIO_CONSOLE=y
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+CONFIG_MEDIA_SUPPORT=y
+CONFIG_FB=y
+CONFIG_FB_GOLDFISH=y
+CONFIG_FB_SIMPLE=y
+CONFIG_BACKLIGHT_LCD_SUPPORT=y
+CONFIG_LOGO=y
+# CONFIG_LOGO_LINUX_MONO is not set
+# CONFIG_LOGO_LINUX_VGA16 is not set
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_HIDRAW=y
+CONFIG_UHID=y
+CONFIG_HID_A4TECH=y
+CONFIG_HID_ACRUX=y
+CONFIG_HID_ACRUX_FF=y
+CONFIG_HID_APPLE=y
+CONFIG_HID_BELKIN=y
+CONFIG_HID_CHERRY=y
+CONFIG_HID_CHICONY=y
+CONFIG_HID_PRODIKEYS=y
+CONFIG_HID_CYPRESS=y
+CONFIG_HID_DRAGONRISE=y
+CONFIG_DRAGONRISE_FF=y
+CONFIG_HID_EMS_FF=y
+CONFIG_HID_ELECOM=y
+CONFIG_HID_EZKEY=y
+CONFIG_HID_HOLTEK=y
+CONFIG_HID_KEYTOUCH=y
+CONFIG_HID_KYE=y
+CONFIG_HID_UCLOGIC=y
+CONFIG_HID_WALTOP=y
+CONFIG_HID_GYRATION=y
+CONFIG_HID_TWINHAN=y
+CONFIG_HID_KENSINGTON=y
+CONFIG_HID_LCPOWER=y
+CONFIG_HID_LOGITECH=y
+CONFIG_HID_LOGITECH_DJ=y
+CONFIG_LOGITECH_FF=y
+CONFIG_LOGIRUMBLEPAD2_FF=y
+CONFIG_LOGIG940_FF=y
+CONFIG_HID_MAGICMOUSE=y
+CONFIG_HID_MICROSOFT=y
+CONFIG_HID_MONTEREY=y
+CONFIG_HID_MULTITOUCH=y
+CONFIG_HID_NTRIG=y
+CONFIG_HID_ORTEK=y
+CONFIG_HID_PANTHERLORD=y
+CONFIG_PANTHERLORD_FF=y
+CONFIG_HID_PETALYNX=y
+CONFIG_HID_PICOLCD=y
+CONFIG_HID_PRIMAX=y
+CONFIG_HID_ROCCAT=y
+CONFIG_HID_SAITEK=y
+CONFIG_HID_SAMSUNG=y
+CONFIG_HID_SONY=y
+CONFIG_HID_SPEEDLINK=y
+CONFIG_HID_SUNPLUS=y
+CONFIG_HID_GREENASIA=y
+CONFIG_GREENASIA_FF=y
+CONFIG_HID_SMARTJOYPLUS=y
+CONFIG_SMARTJOYPLUS_FF=y
+CONFIG_HID_TIVO=y
+CONFIG_HID_TOPSEED=y
+CONFIG_HID_THRUSTMASTER=y
+CONFIG_HID_WACOM=y
+CONFIG_HID_WIIMOTE=y
+CONFIG_HID_ZEROPLUS=y
+CONFIG_HID_ZYDACRON=y
+CONFIG_USB_HIDDEV=y
+CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_OTG_WAKELOCK=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_PL031=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_STAGING=y
+CONFIG_ASHMEM=y
+CONFIG_ANDROID_LOW_MEMORY_KILLER=y
+CONFIG_SYNC=y
+CONFIG_SW_SYNC=y
+CONFIG_SW_SYNC_USER=y
+CONFIG_ION=y
+CONFIG_GOLDFISH_AUDIO=y
+CONFIG_GOLDFISH=y
+CONFIG_GOLDFISH_PIPE=y
+CONFIG_ANDROID=y
+CONFIG_ANDROID_BINDER_IPC=y
+CONFIG_EXT4_FS=y
+CONFIG_EXT4_FS_SECURITY=y
+CONFIG_QUOTA=y
+CONFIG_FUSE_FS=y
+CONFIG_CUSE=y
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_PSTORE=y
+CONFIG_PSTORE_CONSOLE=y
+CONFIG_PSTORE_RAM=y
+CONFIG_NFS_FS=y
+CONFIG_ROOT_NFS=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_DEBUG_INFO=y
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_DETECT_HUNG_TASK=y
+CONFIG_PANIC_TIMEOUT=5
+# CONFIG_SCHED_DEBUG is not set
+CONFIG_SCHEDSTATS=y
+CONFIG_TIMER_STATS=y
+CONFIG_ENABLE_DEFAULT_TRACERS=y
+CONFIG_SECURITY=y
+CONFIG_SECURITY_NETWORK=y
+CONFIG_SECURITY_SELINUX=y
+CONFIG_VIRTUALIZATION=y
diff --git a/arch/arm/include/asm/fiq_glue.h b/arch/arm/include/asm/fiq_glue.h
new file mode 100644
index 000000000000..a9e244f9f197
--- /dev/null
+++ b/arch/arm/include/asm/fiq_glue.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __ASM_FIQ_GLUE_H
+#define __ASM_FIQ_GLUE_H
+
+struct fiq_glue_handler {
+ void (*fiq)(struct fiq_glue_handler *h, void *regs, void *svc_sp);
+ void (*resume)(struct fiq_glue_handler *h);
+};
+typedef void (*fiq_return_handler_t)(void);
+
+int fiq_glue_register_handler(struct fiq_glue_handler *handler);
+int fiq_glue_set_return_handler(fiq_return_handler_t fiq_return);
+int fiq_glue_clear_return_handler(fiq_return_handler_t fiq_return);
+
+#ifdef CONFIG_FIQ_GLUE
+void fiq_glue_resume(void);
+#else
+static inline void fiq_glue_resume(void) {}
+#endif
+
+#endif
diff --git a/arch/arm/include/asm/pgtable-3level.h b/arch/arm/include/asm/pgtable-3level.h
index fd929b5ded9e..9459ca85bd20 100644
--- a/arch/arm/include/asm/pgtable-3level.h
+++ b/arch/arm/include/asm/pgtable-3level.h
@@ -250,6 +250,7 @@ PMD_BIT_FUNC(mkold, &= ~PMD_SECT_AF);
PMD_BIT_FUNC(mksplitting, |= L_PMD_SECT_SPLITTING);
PMD_BIT_FUNC(mkwrite, &= ~L_PMD_SECT_RDONLY);
PMD_BIT_FUNC(mkdirty, |= L_PMD_SECT_DIRTY);
+PMD_BIT_FUNC(mkclean, &= ~L_PMD_SECT_DIRTY);
PMD_BIT_FUNC(mkyoung, |= PMD_SECT_AF);
#define pmd_mkhuge(pmd) (__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT))
diff --git a/arch/arm/include/asm/topology.h b/arch/arm/include/asm/topology.h
index 370f7a732900..d06064120694 100644
--- a/arch/arm/include/asm/topology.h
+++ b/arch/arm/include/asm/topology.h
@@ -3,6 +3,7 @@
#ifdef CONFIG_ARM_CPU_TOPOLOGY
+#include <linux/cpufreq.h>
#include <linux/cpumask.h>
struct cputopo_arm {
@@ -24,6 +25,12 @@ void init_cpu_topology(void);
void store_cpu_topology(unsigned int cpuid);
const struct cpumask *cpu_coregroup_mask(int cpu);
+#ifdef CONFIG_CPU_FREQ
+#define arch_scale_freq_capacity cpufreq_scale_freq_capacity
+#endif
+#define arch_scale_cpu_capacity scale_cpu_capacity
+extern unsigned long scale_cpu_capacity(struct sched_domain *sd, int cpu);
+
#else
static inline void init_cpu_topology(void) { }
diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c
index 871b8267d211..a586cfe7b4e4 100644
--- a/arch/arm/kernel/asm-offsets.c
+++ b/arch/arm/kernel/asm-offsets.c
@@ -10,7 +10,6 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-#include <linux/compiler.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/dma-mapping.h>
@@ -41,19 +40,10 @@
* GCC 3.2.x: miscompiles NEW_AUX_ENT in fs/binfmt_elf.c
* (http://gcc.gnu.org/PR8896) and incorrect structure
* initialisation in fs/jffs2/erase.c
- * GCC 4.8.0-4.8.2: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854
- * miscompiles find_get_entry(), and can result in EXT3 and EXT4
- * filesystem corruption (possibly other FS too).
*/
-#ifdef __GNUC__
#if (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
#error Your compiler is too buggy; it is known to miscompile kernels.
-#error Known good compilers: 3.3, 4.x
-#endif
-#if GCC_VERSION >= 40800 && GCC_VERSION < 40803
-#error Your compiler is too buggy; it is known to miscompile kernels
-#error and result in filesystem corruption and oopses.
-#endif
+#error Known good compilers: 3.3
#endif
int main(void)
diff --git a/arch/arm/kernel/kgdb.c b/arch/arm/kernel/kgdb.c
index 9232caee7060..f3c662299531 100644
--- a/arch/arm/kernel/kgdb.c
+++ b/arch/arm/kernel/kgdb.c
@@ -140,6 +140,8 @@ int kgdb_arch_handle_exception(int exception_vector, int signo,
static int kgdb_brk_fn(struct pt_regs *regs, unsigned int instr)
{
+ if (user_mode(regs))
+ return -1;
kgdb_handle_exception(1, SIGTRAP, 0, regs);
return 0;
@@ -147,6 +149,8 @@ static int kgdb_brk_fn(struct pt_regs *regs, unsigned int instr)
static int kgdb_compiled_brk_fn(struct pt_regs *regs, unsigned int instr)
{
+ if (user_mode(regs))
+ return -1;
compiled_break = 1;
kgdb_handle_exception(1, SIGTRAP, 0, regs);
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 4adfb46e3ee9..0017b3edfea8 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -80,6 +80,7 @@ void arch_cpu_idle_prepare(void)
void arch_cpu_idle_enter(void)
{
+ idle_notifier_call_chain(IDLE_START);
ledtrig_cpu(CPU_LED_IDLE_START);
#ifdef CONFIG_PL310_ERRATA_769419
wmb();
@@ -89,6 +90,78 @@ void arch_cpu_idle_enter(void)
void arch_cpu_idle_exit(void)
{
ledtrig_cpu(CPU_LED_IDLE_END);
+ idle_notifier_call_chain(IDLE_END);
+}
+
+/*
+ * dump a block of kernel memory from around the given address
+ */
+static void show_data(unsigned long addr, int nbytes, const char *name)
+{
+ int i, j;
+ int nlines;
+ u32 *p;
+
+ /*
+ * don't attempt to dump non-kernel addresses or
+ * values that are probably just small negative numbers
+ */
+ if (addr < PAGE_OFFSET || addr > -256UL)
+ return;
+
+ printk("\n%s: %#lx:\n", name, addr);
+
+ /*
+ * round address down to a 32 bit boundary
+ * and always dump a multiple of 32 bytes
+ */
+ p = (u32 *)(addr & ~(sizeof(u32) - 1));
+ nbytes += (addr & (sizeof(u32) - 1));
+ nlines = (nbytes + 31) / 32;
+
+
+ for (i = 0; i < nlines; i++) {
+ /*
+ * just display low 16 bits of address to keep
+ * each line of the dump < 80 characters
+ */
+ printk("%04lx ", (unsigned long)p & 0xffff);
+ for (j = 0; j < 8; j++) {
+ u32 data;
+ if (probe_kernel_address(p, data)) {
+ printk(" ********");
+ } else {
+ printk(" %08x", data);
+ }
+ ++p;
+ }
+ printk("\n");
+ }
+}
+
+static void show_extra_register_data(struct pt_regs *regs, int nbytes)
+{
+ mm_segment_t fs;
+
+ fs = get_fs();
+ set_fs(KERNEL_DS);
+ show_data(regs->ARM_pc - nbytes, nbytes * 2, "PC");
+ show_data(regs->ARM_lr - nbytes, nbytes * 2, "LR");
+ show_data(regs->ARM_sp - nbytes, nbytes * 2, "SP");
+ show_data(regs->ARM_ip - nbytes, nbytes * 2, "IP");
+ show_data(regs->ARM_fp - nbytes, nbytes * 2, "FP");
+ show_data(regs->ARM_r0 - nbytes, nbytes * 2, "R0");
+ show_data(regs->ARM_r1 - nbytes, nbytes * 2, "R1");
+ show_data(regs->ARM_r2 - nbytes, nbytes * 2, "R2");
+ show_data(regs->ARM_r3 - nbytes, nbytes * 2, "R3");
+ show_data(regs->ARM_r4 - nbytes, nbytes * 2, "R4");
+ show_data(regs->ARM_r5 - nbytes, nbytes * 2, "R5");
+ show_data(regs->ARM_r6 - nbytes, nbytes * 2, "R6");
+ show_data(regs->ARM_r7 - nbytes, nbytes * 2, "R7");
+ show_data(regs->ARM_r8 - nbytes, nbytes * 2, "R8");
+ show_data(regs->ARM_r9 - nbytes, nbytes * 2, "R9");
+ show_data(regs->ARM_r10 - nbytes, nbytes * 2, "R10");
+ set_fs(fs);
}
void __show_regs(struct pt_regs *regs)
@@ -178,6 +251,8 @@ void __show_regs(struct pt_regs *regs)
printk("Control: %08x%s\n", ctrl, buf);
}
#endif
+
+ show_extra_register_data(regs, 128);
}
void show_regs(struct pt_regs * regs)
diff --git a/arch/arm/kernel/reboot.c b/arch/arm/kernel/reboot.c
index 38269358fd25..1a06da8f0366 100644
--- a/arch/arm/kernel/reboot.c
+++ b/arch/arm/kernel/reboot.c
@@ -6,6 +6,7 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
+#include <linux/console.h>
#include <linux/cpu.h>
#include <linux/delay.h>
#include <linux/reboot.h>
@@ -124,6 +125,31 @@ void machine_power_off(void)
pm_power_off();
}
+#ifdef CONFIG_ARM_FLUSH_CONSOLE_ON_RESTART
+void arm_machine_flush_console(void)
+{
+ printk("\n");
+ pr_emerg("Restarting %s\n", linux_banner);
+ if (console_trylock()) {
+ console_unlock();
+ return;
+ }
+
+ mdelay(50);
+
+ local_irq_disable();
+ if (!console_trylock())
+ pr_emerg("arm_restart: Console was locked! Busting\n");
+ else
+ pr_emerg("arm_restart: Console was locked!\n");
+ console_unlock();
+}
+#else
+void arm_machine_flush_console(void)
+{
+}
+#endif
+
/*
* Restart requires that the secondary CPUs stop performing any activity
* while the primary CPU resets the system. Systems with a single CPU can
@@ -140,6 +166,10 @@ void machine_restart(char *cmd)
local_irq_disable();
smp_send_stop();
+ /* Flush the console to make sure all the relevant messages make it
+ * out to the console drivers */
+ arm_machine_flush_console();
+
if (arm_pm_restart)
arm_pm_restart(reboot_mode, cmd);
else
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 20edd349d379..bf63b4693457 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -772,7 +772,7 @@ static void __init request_standard_resources(const struct machine_desc *mdesc)
struct resource *res;
kernel_code.start = virt_to_phys(_text);
- kernel_code.end = virt_to_phys(_etext - 1);
+ kernel_code.end = virt_to_phys(__init_begin - 1);
kernel_data.start = virt_to_phys(_sdata);
kernel_data.end = virt_to_phys(_end - 1);
diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c
index 08b7847bf912..4f2c51ef162d 100644
--- a/arch/arm/kernel/topology.c
+++ b/arch/arm/kernel/topology.c
@@ -42,9 +42,15 @@
*/
static DEFINE_PER_CPU(unsigned long, cpu_scale);
-unsigned long arch_scale_cpu_capacity(struct sched_domain *sd, int cpu)
+unsigned long scale_cpu_capacity(struct sched_domain *sd, int cpu)
{
+#ifdef CONFIG_CPU_FREQ
+ unsigned long max_freq_scale = cpufreq_scale_max_freq_capacity(cpu);
+
+ return per_cpu(cpu_scale, cpu) * max_freq_scale >> SCHED_CAPACITY_SHIFT;
+#else
return per_cpu(cpu_scale, cpu);
+#endif
}
static void set_capacity_scale(unsigned int cpu, unsigned long capacity)
@@ -153,6 +159,8 @@ static void __init parse_dt_topology(void)
}
+static const struct sched_group_energy * const cpu_core_energy(int cpu);
+
/*
* Look for a customed capacity of a CPU in the cpu_capacity table during the
* boot. The update of all CPUs is in O(n^2) for heteregeneous system but the
@@ -160,10 +168,14 @@ static void __init parse_dt_topology(void)
*/
static void update_cpu_capacity(unsigned int cpu)
{
- if (!cpu_capacity(cpu))
- return;
+ unsigned long capacity = SCHED_CAPACITY_SCALE;
+
+ if (cpu_core_energy(cpu)) {
+ int max_cap_idx = cpu_core_energy(cpu)->nr_cap_states - 1;
+ capacity = cpu_core_energy(cpu)->cap_states[max_cap_idx].cap;
+ }
- set_capacity_scale(cpu, cpu_capacity(cpu) / middle_capacity);
+ set_capacity_scale(cpu, capacity);
pr_info("CPU%u: update cpu_capacity %lu\n",
cpu, arch_scale_cpu_capacity(NULL, cpu));
@@ -275,17 +287,138 @@ void store_cpu_topology(unsigned int cpuid)
cpu_topology[cpuid].socket_id, mpidr);
}
+/*
+ * ARM TC2 specific energy cost model data. There are no unit requirements for
+ * the data. Data can be normalized to any reference point, but the
+ * normalization must be consistent. That is, one bogo-joule/watt must be the
+ * same quantity for all data, but we don't care what it is.
+ */
+static struct idle_state idle_states_cluster_a7[] = {
+ { .power = 25 }, /* arch_cpu_idle() (active idle) = WFI */
+ { .power = 25 }, /* WFI */
+ { .power = 10 }, /* cluster-sleep-l */
+ };
+
+static struct idle_state idle_states_cluster_a15[] = {
+ { .power = 70 }, /* arch_cpu_idle() (active idle) = WFI */
+ { .power = 70 }, /* WFI */
+ { .power = 25 }, /* cluster-sleep-b */
+ };
+
+static struct capacity_state cap_states_cluster_a7[] = {
+ /* Cluster only power */
+ { .cap = 150, .power = 2967, }, /* 350 MHz */
+ { .cap = 172, .power = 2792, }, /* 400 MHz */
+ { .cap = 215, .power = 2810, }, /* 500 MHz */
+ { .cap = 258, .power = 2815, }, /* 600 MHz */
+ { .cap = 301, .power = 2919, }, /* 700 MHz */
+ { .cap = 344, .power = 2847, }, /* 800 MHz */
+ { .cap = 387, .power = 3917, }, /* 900 MHz */
+ { .cap = 430, .power = 4905, }, /* 1000 MHz */
+ };
+
+static struct capacity_state cap_states_cluster_a15[] = {
+ /* Cluster only power */
+ { .cap = 426, .power = 7920, }, /* 500 MHz */
+ { .cap = 512, .power = 8165, }, /* 600 MHz */
+ { .cap = 597, .power = 8172, }, /* 700 MHz */
+ { .cap = 682, .power = 8195, }, /* 800 MHz */
+ { .cap = 768, .power = 8265, }, /* 900 MHz */
+ { .cap = 853, .power = 8446, }, /* 1000 MHz */
+ { .cap = 938, .power = 11426, }, /* 1100 MHz */
+ { .cap = 1024, .power = 15200, }, /* 1200 MHz */
+ };
+
+static struct sched_group_energy energy_cluster_a7 = {
+ .nr_idle_states = ARRAY_SIZE(idle_states_cluster_a7),
+ .idle_states = idle_states_cluster_a7,
+ .nr_cap_states = ARRAY_SIZE(cap_states_cluster_a7),
+ .cap_states = cap_states_cluster_a7,
+};
+
+static struct sched_group_energy energy_cluster_a15 = {
+ .nr_idle_states = ARRAY_SIZE(idle_states_cluster_a15),
+ .idle_states = idle_states_cluster_a15,
+ .nr_cap_states = ARRAY_SIZE(cap_states_cluster_a15),
+ .cap_states = cap_states_cluster_a15,
+};
+
+static struct idle_state idle_states_core_a7[] = {
+ { .power = 0 }, /* arch_cpu_idle (active idle) = WFI */
+ { .power = 0 }, /* WFI */
+ { .power = 0 }, /* cluster-sleep-l */
+ };
+
+static struct idle_state idle_states_core_a15[] = {
+ { .power = 0 }, /* arch_cpu_idle (active idle) = WFI */
+ { .power = 0 }, /* WFI */
+ { .power = 0 }, /* cluster-sleep-b */
+ };
+
+static struct capacity_state cap_states_core_a7[] = {
+ /* Power per cpu */
+ { .cap = 150, .power = 187, }, /* 350 MHz */
+ { .cap = 172, .power = 275, }, /* 400 MHz */
+ { .cap = 215, .power = 334, }, /* 500 MHz */
+ { .cap = 258, .power = 407, }, /* 600 MHz */
+ { .cap = 301, .power = 447, }, /* 700 MHz */
+ { .cap = 344, .power = 549, }, /* 800 MHz */
+ { .cap = 387, .power = 761, }, /* 900 MHz */
+ { .cap = 430, .power = 1024, }, /* 1000 MHz */
+ };
+
+static struct capacity_state cap_states_core_a15[] = {
+ /* Power per cpu */
+ { .cap = 426, .power = 2021, }, /* 500 MHz */
+ { .cap = 512, .power = 2312, }, /* 600 MHz */
+ { .cap = 597, .power = 2756, }, /* 700 MHz */
+ { .cap = 682, .power = 3125, }, /* 800 MHz */
+ { .cap = 768, .power = 3524, }, /* 900 MHz */
+ { .cap = 853, .power = 3846, }, /* 1000 MHz */
+ { .cap = 938, .power = 5177, }, /* 1100 MHz */
+ { .cap = 1024, .power = 6997, }, /* 1200 MHz */
+ };
+
+static struct sched_group_energy energy_core_a7 = {
+ .nr_idle_states = ARRAY_SIZE(idle_states_core_a7),
+ .idle_states = idle_states_core_a7,
+ .nr_cap_states = ARRAY_SIZE(cap_states_core_a7),
+ .cap_states = cap_states_core_a7,
+};
+
+static struct sched_group_energy energy_core_a15 = {
+ .nr_idle_states = ARRAY_SIZE(idle_states_core_a15),
+ .idle_states = idle_states_core_a15,
+ .nr_cap_states = ARRAY_SIZE(cap_states_core_a15),
+ .cap_states = cap_states_core_a15,
+};
+
+/* sd energy functions */
+static inline
+const struct sched_group_energy * const cpu_cluster_energy(int cpu)
+{
+ return cpu_topology[cpu].socket_id ? &energy_cluster_a7 :
+ &energy_cluster_a15;
+}
+
+static inline
+const struct sched_group_energy * const cpu_core_energy(int cpu)
+{
+ return cpu_topology[cpu].socket_id ? &energy_core_a7 :
+ &energy_core_a15;
+}
+
static inline int cpu_corepower_flags(void)
{
- return SD_SHARE_PKG_RESOURCES | SD_SHARE_POWERDOMAIN;
+ return SD_SHARE_PKG_RESOURCES | SD_SHARE_POWERDOMAIN | \
+ SD_SHARE_CAP_STATES;
}
static struct sched_domain_topology_level arm_topology[] = {
#ifdef CONFIG_SCHED_MC
- { cpu_corepower_mask, cpu_corepower_flags, SD_INIT_NAME(GMC) },
- { cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) },
+ { cpu_coregroup_mask, cpu_corepower_flags, cpu_core_energy, SD_INIT_NAME(MC) },
#endif
- { cpu_cpu_mask, SD_INIT_NAME(DIE) },
+ { cpu_cpu_mask, NULL, cpu_cluster_energy, SD_INIT_NAME(DIE) },
{ NULL, },
};
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index 8b60fde5ce48..be2ab6d3b91f 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -120,6 +120,8 @@ SECTIONS
#ifdef CONFIG_DEBUG_RODATA
. = ALIGN(1<<SECTION_SHIFT);
#endif
+ _etext = .; /* End of text section */
+
RO_DATA(PAGE_SIZE)
. = ALIGN(4);
@@ -150,8 +152,6 @@ SECTIONS
NOTES
- _etext = .; /* End of text and rodata section */
-
#ifndef CONFIG_XIP_KERNEL
# ifdef CONFIG_ARM_KERNMEM_PERMS
. = ALIGN(1<<SECTION_SHIFT);
diff --git a/arch/arm/mm/cache-v6.S b/arch/arm/mm/cache-v6.S
index 24659952c278..11da0f50a1fe 100644
--- a/arch/arm/mm/cache-v6.S
+++ b/arch/arm/mm/cache-v6.S
@@ -270,6 +270,11 @@ v6_dma_clean_range:
* - end - virtual end address of region
*/
ENTRY(v6_dma_flush_range)
+#ifdef CONFIG_CACHE_FLUSH_RANGE_LIMIT
+ sub r2, r1, r0
+ cmp r2, #CONFIG_CACHE_FLUSH_RANGE_LIMIT
+ bhi v6_dma_flush_dcache_all
+#endif
#ifdef CONFIG_DMA_CACHE_RWFO
ldrb r2, [r0] @ read for ownership
strb r2, [r0] @ write for ownership
@@ -292,6 +297,18 @@ ENTRY(v6_dma_flush_range)
mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
ret lr
+#ifdef CONFIG_CACHE_FLUSH_RANGE_LIMIT
+v6_dma_flush_dcache_all:
+ mov r0, #0
+#ifdef HARVARD_CACHE
+ mcr p15, 0, r0, c7, c14, 0 @ D cache clean+invalidate
+#else
+ mcr p15, 0, r0, c7, c15, 0 @ Cache clean+invalidate
+#endif
+ mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
+ mov pc, lr
+#endif
+
/*
* dma_map_area(start, size, dir)
* - start - kernel virtual start address
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index c095455d496e..c73f10c1984f 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -273,10 +273,10 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
local_irq_enable();
/*
- * If we're in an interrupt or have no user
+ * If we're in an interrupt, or have no irqs, or have no user
* context, we must not take the fault..
*/
- if (faulthandler_disabled() || !mm)
+ if (faulthandler_disabled() || irqs_disabled() || !mm)
goto no_context;
if (user_mode(regs))
diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c
index 407dc786583a..66353caa35b9 100644
--- a/arch/arm/mm/mmap.c
+++ b/arch/arm/mm/mmap.c
@@ -173,8 +173,7 @@ unsigned long arch_mmap_rnd(void)
{
unsigned long rnd;
- /* 8 bits of randomness in 20 address space bits */
- rnd = (unsigned long)get_random_int() % (1 << 8);
+ rnd = get_random_long() & ((1UL << mmap_rnd_bits) - 1);
return rnd << PAGE_SHIFT;
}
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 4867f5daf82c..de9f8921e407 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -572,7 +572,7 @@ static void __init build_mem_type_table(void)
* in the Short-descriptor translation table format descriptors.
*/
if (cpu_arch == CPU_ARCH_ARMv7 &&
- (read_cpuid_ext(CPUID_EXT_MMFR0) & 0xF) == 4) {
+ (read_cpuid_ext(CPUID_EXT_MMFR0) & 0xF) >= 4) {
user_pmd_table |= PMD_PXNTABLE;
}
#endif
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 3510b01acc8c..4bda2c06fe05 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -54,6 +54,8 @@ config ARM64
select HAVE_ARCH_JUMP_LABEL
select HAVE_ARCH_KASAN if SPARSEMEM_VMEMMAP && !(ARM64_16K_PAGES && ARM64_VA_BITS_48)
select HAVE_ARCH_KGDB
+ select HAVE_ARCH_MMAP_RND_BITS
+ select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_ARCH_TRACEHOOK
select HAVE_BPF_JIT
@@ -112,9 +114,40 @@ config ARCH_PHYS_ADDR_T_64BIT
config MMU
def_bool y
+config ARCH_MMAP_RND_BITS_MIN
+ default 14 if ARM64_64K_PAGES
+ default 16 if ARM64_16K_PAGES
+ default 18
+
+# max bits determined by the following formula:
+# VA_BITS - PAGE_SHIFT - 3
+config ARCH_MMAP_RND_BITS_MAX
+ default 19 if ARM64_VA_BITS=36
+ default 24 if ARM64_VA_BITS=39
+ default 27 if ARM64_VA_BITS=42
+ default 30 if ARM64_VA_BITS=47
+ default 29 if ARM64_VA_BITS=48 && ARM64_64K_PAGES
+ default 31 if ARM64_VA_BITS=48 && ARM64_16K_PAGES
+ default 33 if ARM64_VA_BITS=48
+ default 14 if ARM64_64K_PAGES
+ default 16 if ARM64_16K_PAGES
+ default 18
+
+config ARCH_MMAP_RND_COMPAT_BITS_MIN
+ default 7 if ARM64_64K_PAGES
+ default 9 if ARM64_16K_PAGES
+ default 11
+
+config ARCH_MMAP_RND_COMPAT_BITS_MAX
+ default 16
+
config NO_IOPORT_MAP
def_bool y if !PCI
+config ILLEGAL_POINTER_VALUE
+ hex
+ default 0xdead000000000000
+
config STACKTRACE_SUPPORT
def_bool y
@@ -686,6 +719,14 @@ config SETEND_EMULATION
If unsure, say Y
endif
+config ARM64_SW_TTBR0_PAN
+ bool "Emulate Privileged Access Never using TTBR0_EL1 switching"
+ help
+ Enabling this option prevents the kernel from accessing
+ user-space memory directly by pointing TTBR0_EL1 to a reserved
+ zeroed area and reserved ASID. The user access routines
+ restore the valid TTBR0_EL1 temporarily.
+
menu "ARMv8.1 architectural features"
config ARM64_HW_AFDBM
@@ -775,7 +816,7 @@ config RELOCATABLE
config RANDOMIZE_BASE
bool "Randomize the address of the kernel image"
- select ARM64_MODULE_PLTS
+ select ARM64_MODULE_PLTS if MODULES
select RELOCATABLE
help
Randomizes the virtual address at which the kernel image is
@@ -794,7 +835,7 @@ config RANDOMIZE_BASE
config RANDOMIZE_MODULE_REGION_FULL
bool "Randomize the module region independently from the core kernel"
- depends on RANDOMIZE_BASE
+ depends on RANDOMIZE_BASE && !DYNAMIC_FTRACE
default y
help
Randomizes the location of the module region without considering the
@@ -828,6 +869,23 @@ config CMDLINE
entering them here. As a minimum, you should specify the the
root device (e.g. root=/dev/nfs).
+choice
+ prompt "Kernel command line type" if CMDLINE != ""
+ default CMDLINE_FROM_BOOTLOADER
+
+config CMDLINE_FROM_BOOTLOADER
+ bool "Use bootloader kernel arguments if available"
+ help
+ Uses the command-line options passed by the boot loader. If
+ the boot loader doesn't provide any, the default kernel command
+ string provided in CMDLINE will be used.
+
+config CMDLINE_EXTEND
+ bool "Extend bootloader kernel arguments"
+ help
+ The command-line arguments provided by the boot loader will be
+ appended to the default kernel command string.
+
config CMDLINE_FORCE
bool "Always use the default kernel command string"
help
@@ -835,6 +893,7 @@ config CMDLINE_FORCE
loader passes other arguments to the kernel.
This is useful if you cannot or don't want to change the
command-line options your boot loader passes to the kernel.
+endchoice
config EFI_STUB
bool
@@ -867,6 +926,21 @@ config DMI
However, even with this option, the resultant kernel should
continue to boot on existing non-UEFI platforms.
+config BUILD_ARM64_APPENDED_DTB_IMAGE
+ bool "Build a concatenated Image.gz/dtb by default"
+ depends on OF
+ help
+ Enabling this option will cause a concatenated Image.gz and list of
+ DTBs to be built by default (instead of a standalone Image.gz.)
+ The image will built in arch/arm64/boot/Image.gz-dtb
+
+config BUILD_ARM64_APPENDED_DTB_IMAGE_NAMES
+ string "Default dtb names"
+ depends on BUILD_ARM64_APPENDED_DTB_IMAGE
+ help
+ Space separated list of names of dtbs to append when
+ building a concatenated Image.gz-dtb.
+
endmenu
menu "Userspace binary formats"
diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug
index ab1cb1fc4e3d..d33041614206 100644
--- a/arch/arm64/Kconfig.debug
+++ b/arch/arm64/Kconfig.debug
@@ -64,13 +64,13 @@ config DEBUG_SET_MODULE_RONX
config DEBUG_RODATA
bool "Make kernel text and rodata read-only"
+ default y
help
If this is set, kernel text and rodata will be made read-only. This
is to help catch accidental or malicious attempts to change the
- kernel's executable code. Additionally splits rodata from kernel
- text so it can be made explicitly non-executable.
+ kernel's executable code.
- If in doubt, say Y
+ If in doubt, say Y
config DEBUG_ALIGN_RODATA
depends on DEBUG_RODATA
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 0a9bf4500852..101632379b8b 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -31,6 +31,7 @@ $(warning LSE atomics not supported by binutils)
endif
KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr)
+KBUILD_CFLAGS += -fno-pic
KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads)
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
KBUILD_AFLAGS += $(lseinstr)
@@ -83,7 +84,12 @@ libs-y := arch/arm64/lib/ $(libs-y)
core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
# Default target when executing plain make
+ifeq ($(CONFIG_BUILD_ARM64_APPENDED_DTB_IMAGE),y)
+KBUILD_IMAGE := Image.gz-dtb
+else
KBUILD_IMAGE := Image.gz
+endif
+
KBUILD_DTBS := dtbs
all: $(KBUILD_IMAGE) $(KBUILD_DTBS)
@@ -110,6 +116,9 @@ dtbs: prepare scripts
dtbs_install:
$(Q)$(MAKE) $(dtbinst)=$(boot)/dts
+Image-dtb Image.gz-dtb: vmlinux scripts dtbs
+ $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
+
PHONY += vdso_install
vdso_install:
$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
diff --git a/arch/arm64/boot/.gitignore b/arch/arm64/boot/.gitignore
index 8dab0bb6ae66..34e35209fc2e 100644
--- a/arch/arm64/boot/.gitignore
+++ b/arch/arm64/boot/.gitignore
@@ -1,2 +1,4 @@
Image
+Image-dtb
Image.gz
+Image.gz-dtb
diff --git a/arch/arm64/boot/Makefile b/arch/arm64/boot/Makefile
index abcbba2f01ba..7ab8e74cd83a 100644
--- a/arch/arm64/boot/Makefile
+++ b/arch/arm64/boot/Makefile
@@ -14,14 +14,27 @@
# Based on the ia64 boot/Makefile.
#
+include $(srctree)/arch/arm64/boot/dts/Makefile
+
targets := Image Image.gz
+DTB_NAMES := $(subst $\",,$(CONFIG_BUILD_ARM64_APPENDED_DTB_IMAGE_NAMES))
+ifneq ($(DTB_NAMES),)
+DTB_LIST := $(addsuffix .dtb,$(DTB_NAMES))
+else
+DTB_LIST := $(dtb-y)
+endif
+DTB_OBJS := $(addprefix $(obj)/dts/,$(DTB_LIST))
+
$(obj)/Image: vmlinux FORCE
$(call if_changed,objcopy)
$(obj)/Image.bz2: $(obj)/Image FORCE
$(call if_changed,bzip2)
+$(obj)/Image-dtb: $(obj)/Image $(DTB_OBJS) FORCE
+ $(call if_changed,cat)
+
$(obj)/Image.gz: $(obj)/Image FORCE
$(call if_changed,gzip)
@@ -34,6 +47,9 @@ $(obj)/Image.lzma: $(obj)/Image FORCE
$(obj)/Image.lzo: $(obj)/Image FORCE
$(call if_changed,lzo)
+$(obj)/Image.gz-dtb: $(obj)/Image.gz $(DTB_OBJS) FORCE
+ $(call if_changed,cat)
+
install: $(obj)/Image
$(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \
$(obj)/Image System.map "$(INSTALL_PATH)"
diff --git a/arch/arm64/boot/dts/Makefile b/arch/arm64/boot/dts/Makefile
index eb3c42d97175..062edb210993 100644
--- a/arch/arm64/boot/dts/Makefile
+++ b/arch/arm64/boot/dts/Makefile
@@ -21,3 +21,17 @@ dtstree := $(srctree)/$(src)
dtb-$(CONFIG_OF_ALL_DTBS) := $(patsubst $(dtstree)/%.dts,%.dtb, $(foreach d,$(dts-dirs), $(wildcard $(dtstree)/$(d)/*.dts)))
always := $(dtb-y)
+
+targets += dtbs
+
+DTB_NAMES := $(subst $\",,$(CONFIG_BUILD_ARM64_APPENDED_DTB_IMAGE_NAMES))
+ifneq ($(DTB_NAMES),)
+DTB_LIST := $(addsuffix .dtb,$(DTB_NAMES))
+else
+DTB_LIST := $(dtb-y)
+endif
+targets += $(DTB_LIST)
+
+dtbs: $(addprefix $(obj)/, $(DTB_LIST))
+
+clean-files := dts/*.dtb *.dtb
diff --git a/arch/arm64/configs/ranchu64_defconfig b/arch/arm64/configs/ranchu64_defconfig
new file mode 100644
index 000000000000..fc55008d8c4c
--- /dev/null
+++ b/arch/arm64/configs/ranchu64_defconfig
@@ -0,0 +1,312 @@
+# CONFIG_LOCALVERSION_AUTO is not set
+# CONFIG_SWAP is not set
+CONFIG_POSIX_MQUEUE=y
+CONFIG_AUDIT=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_BSD_PROCESS_ACCT_V3=y
+CONFIG_TASKSTATS=y
+CONFIG_TASK_DELAY_ACCT=y
+CONFIG_TASK_XACCT=y
+CONFIG_TASK_IO_ACCOUNTING=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_CGROUP_DEBUG=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_RT_GROUP_SCHED=y
+CONFIG_SCHED_AUTOGROUP=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_EMBEDDED=y
+# CONFIG_COMPAT_BRK is not set
+CONFIG_PROFILING=y
+CONFIG_ARCH_MMAP_RND_BITS=24
+CONFIG_ARCH_MMAP_RND_COMPAT_BITS=16
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+CONFIG_ARCH_VEXPRESS=y
+CONFIG_NR_CPUS=4
+CONFIG_PREEMPT=y
+CONFIG_KSM=y
+CONFIG_SECCOMP=y
+CONFIG_ARMV8_DEPRECATED=y
+CONFIG_SWP_EMULATION=y
+CONFIG_CP15_BARRIER_EMULATION=y
+CONFIG_SETEND_EMULATION=y
+CONFIG_CMDLINE="console=ttyAMA0"
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+CONFIG_COMPAT=y
+CONFIG_PM_AUTOSLEEP=y
+CONFIG_PM_WAKELOCKS=y
+CONFIG_PM_WAKELOCKS_LIMIT=0
+# CONFIG_PM_WAKELOCKS_GC is not set
+CONFIG_PM_DEBUG=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_XFRM_USER=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+CONFIG_INET_DIAG_DESTROY=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_ADVANCED_ROUTER=y
+CONFIG_IP_MULTIPLE_TABLES=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_INET_ESP=y
+# CONFIG_INET_LRO is not set
+CONFIG_IPV6_ROUTER_PREF=y
+CONFIG_IPV6_ROUTE_INFO=y
+CONFIG_IPV6_OPTIMISTIC_DAD=y
+CONFIG_INET6_AH=y
+CONFIG_INET6_ESP=y
+CONFIG_INET6_IPCOMP=y
+CONFIG_IPV6_MIP6=y
+CONFIG_IPV6_MULTIPLE_TABLES=y
+CONFIG_NETFILTER=y
+CONFIG_NF_CONNTRACK=y
+CONFIG_NF_CONNTRACK_SECMARK=y
+CONFIG_NF_CONNTRACK_EVENTS=y
+CONFIG_NF_CT_PROTO_DCCP=y
+CONFIG_NF_CT_PROTO_SCTP=y
+CONFIG_NF_CT_PROTO_UDPLITE=y
+CONFIG_NF_CONNTRACK_AMANDA=y
+CONFIG_NF_CONNTRACK_FTP=y
+CONFIG_NF_CONNTRACK_H323=y
+CONFIG_NF_CONNTRACK_IRC=y
+CONFIG_NF_CONNTRACK_NETBIOS_NS=y
+CONFIG_NF_CONNTRACK_PPTP=y
+CONFIG_NF_CONNTRACK_SANE=y
+CONFIG_NF_CONNTRACK_TFTP=y
+CONFIG_NF_CT_NETLINK=y
+CONFIG_NETFILTER_XT_TARGET_CLASSIFY=y
+CONFIG_NETFILTER_XT_TARGET_CONNMARK=y
+CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=y
+CONFIG_NETFILTER_XT_TARGET_IDLETIMER=y
+CONFIG_NETFILTER_XT_TARGET_MARK=y
+CONFIG_NETFILTER_XT_TARGET_NFLOG=y
+CONFIG_NETFILTER_XT_TARGET_NFQUEUE=y
+CONFIG_NETFILTER_XT_TARGET_TPROXY=y
+CONFIG_NETFILTER_XT_TARGET_TRACE=y
+CONFIG_NETFILTER_XT_TARGET_SECMARK=y
+CONFIG_NETFILTER_XT_TARGET_TCPMSS=y
+CONFIG_NETFILTER_XT_MATCH_COMMENT=y
+CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=y
+CONFIG_NETFILTER_XT_MATCH_CONNMARK=y
+CONFIG_NETFILTER_XT_MATCH_CONNTRACK=y
+CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=y
+CONFIG_NETFILTER_XT_MATCH_HELPER=y
+CONFIG_NETFILTER_XT_MATCH_IPRANGE=y
+CONFIG_NETFILTER_XT_MATCH_LENGTH=y
+CONFIG_NETFILTER_XT_MATCH_LIMIT=y
+CONFIG_NETFILTER_XT_MATCH_MAC=y
+CONFIG_NETFILTER_XT_MATCH_MARK=y
+CONFIG_NETFILTER_XT_MATCH_POLICY=y
+CONFIG_NETFILTER_XT_MATCH_PKTTYPE=y
+CONFIG_NETFILTER_XT_MATCH_QTAGUID=y
+CONFIG_NETFILTER_XT_MATCH_QUOTA=y
+CONFIG_NETFILTER_XT_MATCH_QUOTA2=y
+CONFIG_NETFILTER_XT_MATCH_SOCKET=y
+CONFIG_NETFILTER_XT_MATCH_STATE=y
+CONFIG_NETFILTER_XT_MATCH_STATISTIC=y
+CONFIG_NETFILTER_XT_MATCH_STRING=y
+CONFIG_NETFILTER_XT_MATCH_TIME=y
+CONFIG_NETFILTER_XT_MATCH_U32=y
+CONFIG_NF_CONNTRACK_IPV4=y
+CONFIG_IP_NF_IPTABLES=y
+CONFIG_IP_NF_MATCH_AH=y
+CONFIG_IP_NF_MATCH_ECN=y
+CONFIG_IP_NF_MATCH_RPFILTER=y
+CONFIG_IP_NF_MATCH_TTL=y
+CONFIG_IP_NF_FILTER=y
+CONFIG_IP_NF_TARGET_REJECT=y
+CONFIG_IP_NF_MANGLE=y
+CONFIG_IP_NF_TARGET_ECN=y
+CONFIG_IP_NF_TARGET_TTL=y
+CONFIG_IP_NF_RAW=y
+CONFIG_IP_NF_SECURITY=y
+CONFIG_IP_NF_ARPTABLES=y
+CONFIG_IP_NF_ARPFILTER=y
+CONFIG_IP_NF_ARP_MANGLE=y
+CONFIG_NF_CONNTRACK_IPV6=y
+CONFIG_IP6_NF_IPTABLES=y
+CONFIG_IP6_NF_MATCH_AH=y
+CONFIG_IP6_NF_MATCH_EUI64=y
+CONFIG_IP6_NF_MATCH_FRAG=y
+CONFIG_IP6_NF_MATCH_OPTS=y
+CONFIG_IP6_NF_MATCH_HL=y
+CONFIG_IP6_NF_MATCH_IPV6HEADER=y
+CONFIG_IP6_NF_MATCH_MH=y
+CONFIG_IP6_NF_MATCH_RT=y
+CONFIG_IP6_NF_TARGET_HL=y
+CONFIG_IP6_NF_FILTER=y
+CONFIG_IP6_NF_TARGET_REJECT=y
+CONFIG_IP6_NF_MANGLE=y
+CONFIG_IP6_NF_RAW=y
+CONFIG_BRIDGE=y
+CONFIG_NET_SCHED=y
+CONFIG_NET_SCH_HTB=y
+CONFIG_NET_CLS_U32=y
+CONFIG_NET_EMATCH=y
+CONFIG_NET_EMATCH_U32=y
+CONFIG_NET_CLS_ACT=y
+# CONFIG_WIRELESS is not set
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_SIZE=8192
+CONFIG_VIRTIO_BLK=y
+CONFIG_SCSI=y
+# CONFIG_SCSI_PROC_FS is not set
+CONFIG_BLK_DEV_SD=y
+# CONFIG_SCSI_LOWLEVEL is not set
+CONFIG_MD=y
+CONFIG_BLK_DEV_DM=y
+CONFIG_DM_CRYPT=y
+CONFIG_DM_UEVENT=y
+CONFIG_DM_VERITY=y
+CONFIG_DM_VERITY_FEC=y
+CONFIG_NETDEVICES=y
+CONFIG_TUN=y
+CONFIG_VIRTIO_NET=y
+CONFIG_SMC91X=y
+CONFIG_PPP=y
+CONFIG_PPP_BSDCOMP=y
+CONFIG_PPP_DEFLATE=y
+CONFIG_PPP_MPPE=y
+CONFIG_PPPOLAC=y
+CONFIG_PPPOPNS=y
+# CONFIG_WLAN is not set
+CONFIG_INPUT_EVDEV=y
+CONFIG_INPUT_KEYRESET=y
+CONFIG_KEYBOARD_GOLDFISH_EVENTS=y
+# CONFIG_INPUT_MOUSE is not set
+CONFIG_INPUT_JOYSTICK=y
+CONFIG_INPUT_TABLET=y
+CONFIG_INPUT_MISC=y
+CONFIG_INPUT_KEYCHORD=y
+CONFIG_INPUT_UINPUT=y
+CONFIG_INPUT_GPIO=y
+# CONFIG_SERIO_SERPORT is not set
+# CONFIG_VT is not set
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_DEVMEM is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_AMBA_PL011=y
+CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
+CONFIG_VIRTIO_CONSOLE=y
+# CONFIG_HW_RANDOM is not set
+CONFIG_BATTERY_GOLDFISH=y
+# CONFIG_HWMON is not set
+CONFIG_MEDIA_SUPPORT=y
+CONFIG_FB=y
+CONFIG_FB_GOLDFISH=y
+CONFIG_FB_SIMPLE=y
+CONFIG_BACKLIGHT_LCD_SUPPORT=y
+CONFIG_LOGO=y
+# CONFIG_LOGO_LINUX_MONO is not set
+# CONFIG_LOGO_LINUX_VGA16 is not set
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_HIDRAW=y
+CONFIG_UHID=y
+CONFIG_HID_A4TECH=y
+CONFIG_HID_ACRUX=y
+CONFIG_HID_ACRUX_FF=y
+CONFIG_HID_APPLE=y
+CONFIG_HID_BELKIN=y
+CONFIG_HID_CHERRY=y
+CONFIG_HID_CHICONY=y
+CONFIG_HID_PRODIKEYS=y
+CONFIG_HID_CYPRESS=y
+CONFIG_HID_DRAGONRISE=y
+CONFIG_DRAGONRISE_FF=y
+CONFIG_HID_EMS_FF=y
+CONFIG_HID_ELECOM=y
+CONFIG_HID_EZKEY=y
+CONFIG_HID_KEYTOUCH=y
+CONFIG_HID_KYE=y
+CONFIG_HID_WALTOP=y
+CONFIG_HID_GYRATION=y
+CONFIG_HID_TWINHAN=y
+CONFIG_HID_KENSINGTON=y
+CONFIG_HID_LCPOWER=y
+CONFIG_HID_LOGITECH=y
+CONFIG_HID_LOGITECH_DJ=y
+CONFIG_LOGITECH_FF=y
+CONFIG_LOGIRUMBLEPAD2_FF=y
+CONFIG_LOGIG940_FF=y
+CONFIG_HID_MAGICMOUSE=y
+CONFIG_HID_MICROSOFT=y
+CONFIG_HID_MONTEREY=y
+CONFIG_HID_MULTITOUCH=y
+CONFIG_HID_ORTEK=y
+CONFIG_HID_PANTHERLORD=y
+CONFIG_PANTHERLORD_FF=y
+CONFIG_HID_PETALYNX=y
+CONFIG_HID_PICOLCD=y
+CONFIG_HID_PRIMAX=y
+CONFIG_HID_SAITEK=y
+CONFIG_HID_SAMSUNG=y
+CONFIG_HID_SPEEDLINK=y
+CONFIG_HID_SUNPLUS=y
+CONFIG_HID_GREENASIA=y
+CONFIG_GREENASIA_FF=y
+CONFIG_HID_SMARTJOYPLUS=y
+CONFIG_SMARTJOYPLUS_FF=y
+CONFIG_HID_TIVO=y
+CONFIG_HID_TOPSEED=y
+CONFIG_HID_THRUSTMASTER=y
+CONFIG_HID_WACOM=y
+CONFIG_HID_WIIMOTE=y
+CONFIG_HID_ZEROPLUS=y
+CONFIG_HID_ZYDACRON=y
+# CONFIG_USB_SUPPORT is not set
+CONFIG_RTC_CLASS=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_STAGING=y
+CONFIG_ASHMEM=y
+CONFIG_ANDROID_TIMED_GPIO=y
+CONFIG_ANDROID_LOW_MEMORY_KILLER=y
+CONFIG_SYNC=y
+CONFIG_SW_SYNC=y
+CONFIG_SW_SYNC_USER=y
+CONFIG_ION=y
+CONFIG_GOLDFISH_AUDIO=y
+CONFIG_GOLDFISH=y
+CONFIG_GOLDFISH_PIPE=y
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_ANDROID=y
+CONFIG_ANDROID_BINDER_IPC=y
+CONFIG_EXT2_FS=y
+CONFIG_EXT4_FS=y
+CONFIG_EXT4_FS_SECURITY=y
+CONFIG_QUOTA=y
+CONFIG_FUSE_FS=y
+CONFIG_CUSE=y
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_NFS_FS=y
+CONFIG_ROOT_NFS=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_FS=y
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_PANIC_TIMEOUT=5
+# CONFIG_SCHED_DEBUG is not set
+CONFIG_SCHEDSTATS=y
+CONFIG_TIMER_STATS=y
+# CONFIG_FTRACE is not set
+CONFIG_ATOMIC64_SELFTEST=y
+CONFIG_DEBUG_RODATA=y
+CONFIG_SECURITY=y
+CONFIG_SECURITY_NETWORK=y
+CONFIG_SECURITY_SELINUX=y
diff --git a/arch/arm64/include/asm/alternative.h b/arch/arm64/include/asm/alternative.h
index beccbdefa106..55101bd86b98 100644
--- a/arch/arm64/include/asm/alternative.h
+++ b/arch/arm64/include/asm/alternative.h
@@ -2,6 +2,7 @@
#define __ASM_ALTERNATIVE_H
#include <asm/cpufeature.h>
+#include <asm/insn.h>
#ifndef __ASSEMBLY__
@@ -90,26 +91,15 @@ void apply_alternatives(void *start, size_t length);
.endm
/*
- * Begin an alternative code sequence.
+ * Alternative sequences
*
- * The code that follows this macro will be assembled and linked as
- * normal. There are no restrictions on this code.
- */
-.macro alternative_if_not cap, enable = 1
- .if \enable
- .pushsection .altinstructions, "a"
- altinstruction_entry 661f, 663f, \cap, 662f-661f, 664f-663f
- .popsection
-661:
- .endif
-.endm
-
-/*
- * Provide the alternative code sequence.
+ * The code for the case where the capability is not present will be
+ * assembled and linked as normal. There are no restrictions on this
+ * code.
*
- * The code that follows this macro is assembled into a special
- * section to be used for dynamic patching. Code that follows this
- * macro must:
+ * The code for the case where the capability is present will be
+ * assembled into a special section to be used for dynamic patching.
+ * Code for that case must:
*
* 1. Be exactly the same length (in bytes) as the default code
* sequence.
@@ -118,27 +108,71 @@ void apply_alternatives(void *start, size_t length);
* alternative sequence it is defined in (branches into an
* alternative sequence are not fixed up).
*/
-.macro alternative_else, enable = 1
- .if \enable
-662: .pushsection .altinstr_replacement, "ax"
-663:
+
+/*
+ * Begin an alternative code sequence.
+ */
+.macro alternative_if_not cap
+ .set .Lasm_alt_mode, 0
+ .pushsection .altinstructions, "a"
+ altinstruction_entry 661f, 663f, \cap, 662f-661f, 664f-663f
+ .popsection
+661:
+.endm
+
+.macro alternative_if cap
+ .set .Lasm_alt_mode, 1
+ .pushsection .altinstructions, "a"
+ altinstruction_entry 663f, 661f, \cap, 664f-663f, 662f-661f
+ .popsection
+ .pushsection .altinstr_replacement, "ax"
+ .align 2 /* So GAS knows label 661 is suitably aligned */
+661:
+.endm
+
+/*
+ * Provide the other half of the alternative code sequence.
+ */
+.macro alternative_else
+662:
+ .if .Lasm_alt_mode==0
+ .pushsection .altinstr_replacement, "ax"
+ .else
+ .popsection
.endif
+663:
.endm
/*
* Complete an alternative code sequence.
*/
-.macro alternative_endif, enable = 1
- .if \enable
-664: .popsection
+.macro alternative_endif
+664:
+ .if .Lasm_alt_mode==0
+ .popsection
+ .endif
.org . - (664b-663b) + (662b-661b)
.org . - (662b-661b) + (664b-663b)
- .endif
+.endm
+
+/*
+ * Provides a trivial alternative or default sequence consisting solely
+ * of NOPs. The number of NOPs is chosen automatically to match the
+ * previous case.
+ */
+.macro alternative_else_nop_endif
+alternative_else
+ nops (662b-661b) / AARCH64_INSN_SIZE
+alternative_endif
.endm
#define _ALTERNATIVE_CFG(insn1, insn2, cap, cfg, ...) \
alternative_insn insn1, insn2, cap, IS_ENABLED(cfg)
+.macro user_alt, label, oldinstr, newinstr, cond
+9999: alternative_insn "\oldinstr", "\newinstr", \cond
+ _ASM_EXTABLE 9999b, \label
+.endm
/*
* Generate the assembly for UAO alternatives with exception table entries.
diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
index 290e13428f4a..d8855ca6068a 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -24,6 +24,7 @@
#define __ASM_ASSEMBLER_H
#include <asm/asm-offsets.h>
+#include <asm/cpufeature.h>
#include <asm/page.h>
#include <asm/pgtable-hwdef.h>
#include <asm/ptrace.h>
@@ -52,6 +53,15 @@
msr daifclr, #2
.endm
+ .macro save_and_disable_irq, flags
+ mrs \flags, daif
+ msr daifset, #2
+ .endm
+
+ .macro restore_irq, flags
+ msr daif, \flags
+ .endm
+
/*
* Enable and disable debug exceptions.
*/
@@ -98,6 +108,15 @@
.endm
/*
+ * NOP sequence
+ */
+ .macro nops, num
+ .rept \num
+ nop
+ .endr
+ .endm
+
+/*
* Emit an entry into the exception table
*/
.macro _asm_extable, from, to
@@ -273,7 +292,16 @@ lr .req x30 // link register
add \size, \kaddr, \size
sub \tmp2, \tmp1, #1
bic \kaddr, \kaddr, \tmp2
-9998: dc \op, \kaddr
+9998:
+ .if (\op == cvau || \op == cvac)
+alternative_if_not ARM64_WORKAROUND_CLEAN_CACHE
+ dc \op, \kaddr
+alternative_else
+ dc civac, \kaddr
+alternative_endif
+ .else
+ dc \op, \kaddr
+ .endif
add \kaddr, \kaddr, \tmp1
cmp \kaddr, \size
b.lo 9998b
@@ -352,4 +380,24 @@ lr .req x30 // link register
movk \reg, :abs_g0_nc:\val
.endm
+/*
+ * Return the current thread_info.
+ */
+ .macro get_thread_info, rd
+ mrs \rd, sp_el0
+ .endm
+
+/*
+ * Errata workaround post TTBR0_EL1 update.
+ */
+ .macro post_ttbr0_update_workaround
+#ifdef CONFIG_CAVIUM_ERRATUM_27456
+alternative_if ARM64_WORKAROUND_CAVIUM_27456
+ ic iallu
+ dsb nsh
+ isb
+alternative_else_nop_endif
+#endif
+ .endm
+
#endif /* __ASM_ASSEMBLER_H */
diff --git a/arch/arm64/include/asm/barrier.h b/arch/arm64/include/asm/barrier.h
index 9622eb48f894..c5dbc5cb8f10 100644
--- a/arch/arm64/include/asm/barrier.h
+++ b/arch/arm64/include/asm/barrier.h
@@ -20,6 +20,9 @@
#ifndef __ASSEMBLY__
+#define __nops(n) ".rept " #n "\nnop\n.endr\n"
+#define nops(n) asm volatile(__nops(n))
+
#define sev() asm volatile("sev" : : : "memory")
#define wfe() asm volatile("wfe" : : : "memory")
#define wfi() asm volatile("wfi" : : : "memory")
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
index 1695f77d8bf2..8e1f826caf99 100644
--- a/arch/arm64/include/asm/cpufeature.h
+++ b/arch/arm64/include/asm/cpufeature.h
@@ -189,6 +189,12 @@ static inline bool system_supports_mixed_endian_el0(void)
return id_aa64mmfr0_mixed_endian_el0(read_system_reg(SYS_ID_AA64MMFR0_EL1));
}
+static inline bool system_uses_ttbr0_pan(void)
+{
+ return IS_ENABLED(CONFIG_ARM64_SW_TTBR0_PAN) &&
+ !cpus_have_cap(ARM64_HAS_PAN);
+}
+
#endif /* __ASSEMBLY__ */
#endif
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h
index ef572206f1c3..932f5a56d1a6 100644
--- a/arch/arm64/include/asm/efi.h
+++ b/arch/arm64/include/asm/efi.h
@@ -1,8 +1,11 @@
#ifndef _ASM_EFI_H
#define _ASM_EFI_H
+#include <asm/cpufeature.h>
#include <asm/io.h>
+#include <asm/mmu_context.h>
#include <asm/neon.h>
+#include <asm/tlbflush.h>
#ifdef CONFIG_EFI
extern void efi_init(void);
@@ -10,6 +13,8 @@ extern void efi_init(void);
#define efi_init()
#endif
+int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
+
#define efi_call_virt(f, ...) \
({ \
efi_##f##_t *__f; \
@@ -63,6 +68,34 @@ extern void efi_init(void);
* Services are enabled and the EFI_RUNTIME_SERVICES bit set.
*/
+static inline void efi_set_pgd(struct mm_struct *mm)
+{
+ __switch_mm(mm);
+
+ if (system_uses_ttbr0_pan()) {
+ if (mm != current->active_mm) {
+ /*
+ * Update the current thread's saved ttbr0 since it is
+ * restored as part of a return from exception. Set
+ * the hardware TTBR0_EL1 using cpu_switch_mm()
+ * directly to enable potential errata workarounds.
+ */
+ update_saved_ttbr0(current, mm);
+ cpu_switch_mm(mm->pgd, mm);
+ } else {
+ /*
+ * Defer the switch to the current thread's TTBR0_EL1
+ * until uaccess_enable(). Restore the current
+ * thread's saved ttbr0 corresponding to its active_mm
+ * (if different from init_mm).
+ */
+ cpu_set_reserved_ttbr0();
+ if (current->active_mm != &init_mm)
+ update_saved_ttbr0(current, current->active_mm);
+ }
+ }
+}
+
void efi_virtmap_load(void);
void efi_virtmap_unload(void);
diff --git a/arch/arm64/include/asm/esr.h b/arch/arm64/include/asm/esr.h
index 77eeb2cc648f..f772e15c4766 100644
--- a/arch/arm64/include/asm/esr.h
+++ b/arch/arm64/include/asm/esr.h
@@ -74,6 +74,7 @@
#define ESR_ELx_EC_SHIFT (26)
#define ESR_ELx_EC_MASK (UL(0x3F) << ESR_ELx_EC_SHIFT)
+#define ESR_ELx_EC(esr) (((esr) & ESR_ELx_EC_MASK) >> ESR_ELx_EC_SHIFT)
#define ESR_ELx_IL (UL(1) << 25)
#define ESR_ELx_ISS_MASK (ESR_ELx_IL - 1)
diff --git a/arch/arm64/include/asm/futex.h b/arch/arm64/include/asm/futex.h
index f2585cdd32c2..85c4a8981d47 100644
--- a/arch/arm64/include/asm/futex.h
+++ b/arch/arm64/include/asm/futex.h
@@ -21,15 +21,12 @@
#include <linux/futex.h>
#include <linux/uaccess.h>
-#include <asm/alternative.h>
-#include <asm/cpufeature.h>
#include <asm/errno.h>
-#include <asm/sysreg.h>
#define __futex_atomic_op(insn, ret, oldval, uaddr, tmp, oparg) \
+do { \
+ uaccess_enable(); \
asm volatile( \
- ALTERNATIVE("nop", SET_PSTATE_PAN(0), ARM64_HAS_PAN, \
- CONFIG_ARM64_PAN) \
" prfm pstl1strm, %2\n" \
"1: ldxr %w1, %2\n" \
insn "\n" \
@@ -44,11 +41,11 @@
" .popsection\n" \
_ASM_EXTABLE(1b, 4b) \
_ASM_EXTABLE(2b, 4b) \
- ALTERNATIVE("nop", SET_PSTATE_PAN(1), ARM64_HAS_PAN, \
- CONFIG_ARM64_PAN) \
: "=&r" (ret), "=&r" (oldval), "+Q" (*uaddr), "=&r" (tmp) \
: "r" (oparg), "Ir" (-EFAULT) \
- : "memory")
+ : "memory"); \
+ uaccess_disable(); \
+} while (0)
static inline int
futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
@@ -118,8 +115,8 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
+ uaccess_enable();
asm volatile("// futex_atomic_cmpxchg_inatomic\n"
-ALTERNATIVE("nop", SET_PSTATE_PAN(0), ARM64_HAS_PAN, CONFIG_ARM64_PAN)
" prfm pstl1strm, %2\n"
"1: ldxr %w1, %2\n"
" sub %w3, %w1, %w4\n"
@@ -134,10 +131,10 @@ ALTERNATIVE("nop", SET_PSTATE_PAN(0), ARM64_HAS_PAN, CONFIG_ARM64_PAN)
" .popsection\n"
_ASM_EXTABLE(1b, 4b)
_ASM_EXTABLE(2b, 4b)
-ALTERNATIVE("nop", SET_PSTATE_PAN(1), ARM64_HAS_PAN, CONFIG_ARM64_PAN)
: "+r" (ret), "=&r" (val), "+Q" (*uaddr), "=&r" (tmp)
: "r" (oldval), "r" (newval), "Ir" (-EFAULT)
: "memory");
+ uaccess_disable();
*uval = val;
return ret;
diff --git a/arch/arm64/include/asm/kernel-pgtable.h b/arch/arm64/include/asm/kernel-pgtable.h
index 5c6375d8528b..7803343e5881 100644
--- a/arch/arm64/include/asm/kernel-pgtable.h
+++ b/arch/arm64/include/asm/kernel-pgtable.h
@@ -19,6 +19,8 @@
#ifndef __ASM_KERNEL_PGTABLE_H
#define __ASM_KERNEL_PGTABLE_H
+#include <asm/pgtable.h>
+#include <asm/sparsemem.h>
/*
* The linear mapping and the start of memory are both 2M aligned (per
@@ -53,6 +55,12 @@
#define SWAPPER_DIR_SIZE (SWAPPER_PGTABLE_LEVELS * PAGE_SIZE)
#define IDMAP_DIR_SIZE (IDMAP_PGTABLE_LEVELS * PAGE_SIZE)
+#ifdef CONFIG_ARM64_SW_TTBR0_PAN
+#define RESERVED_TTBR0_SIZE (PAGE_SIZE)
+#else
+#define RESERVED_TTBR0_SIZE (0)
+#endif
+
/* Initial memory map size */
#if ARM64_SWAPPER_USES_SECTION_MAPS
#define SWAPPER_BLOCK_SHIFT SECTION_SHIFT
@@ -86,10 +94,24 @@
* (64k granule), or a multiple that can be mapped using contiguous bits
* in the page tables: 32 * PMD_SIZE (16k granule)
*/
-#ifdef CONFIG_ARM64_64K_PAGES
-#define ARM64_MEMSTART_ALIGN SZ_512M
+#if defined(CONFIG_ARM64_4K_PAGES)
+#define ARM64_MEMSTART_SHIFT PUD_SHIFT
+#elif defined(CONFIG_ARM64_16K_PAGES)
+#define ARM64_MEMSTART_SHIFT (PMD_SHIFT + 5)
+#else
+#define ARM64_MEMSTART_SHIFT PMD_SHIFT
+#endif
+
+/*
+ * sparsemem vmemmap imposes an additional requirement on the alignment of
+ * memstart_addr, due to the fact that the base of the vmemmap region
+ * has a direct correspondence, and needs to appear sufficiently aligned
+ * in the virtual address space.
+ */
+#if defined(CONFIG_SPARSEMEM_VMEMMAP) && ARM64_MEMSTART_SHIFT < SECTION_SIZE_BITS
+#define ARM64_MEMSTART_ALIGN (1UL << SECTION_SIZE_BITS)
#else
-#define ARM64_MEMSTART_ALIGN SZ_1G
+#define ARM64_MEMSTART_ALIGN (1UL << ARM64_MEMSTART_SHIFT)
#endif
#endif /* __ASM_KERNEL_PGTABLE_H */
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index d776037d199f..ae11e8fdbfd2 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -196,7 +196,11 @@ static inline void *phys_to_virt(phys_addr_t x)
#define ARCH_PFN_OFFSET ((unsigned long)PHYS_PFN_OFFSET)
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
-#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+#define _virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+
+#define _virt_addr_is_linear(kaddr) (((u64)(kaddr)) >= PAGE_OFFSET)
+#define virt_addr_valid(kaddr) (_virt_addr_is_linear(kaddr) && \
+ _virt_addr_valid(kaddr))
#endif
diff --git a/arch/arm64/include/asm/mmu_context.h b/arch/arm64/include/asm/mmu_context.h
index a00f7cf35bbd..e53d30c6f779 100644
--- a/arch/arm64/include/asm/mmu_context.h
+++ b/arch/arm64/include/asm/mmu_context.h
@@ -23,6 +23,7 @@
#include <linux/sched.h>
#include <asm/cacheflush.h>
+#include <asm/cpufeature.h>
#include <asm/proc-fns.h>
#include <asm-generic/mm_hooks.h>
#include <asm/cputype.h>
@@ -113,7 +114,7 @@ static inline void cpu_uninstall_idmap(void)
local_flush_tlb_all();
cpu_set_default_tcr_t0sz();
- if (mm != &init_mm)
+ if (mm != &init_mm && !system_uses_ttbr0_pan())
cpu_switch_mm(mm->pgd, mm);
}
@@ -173,20 +174,26 @@ enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
}
-/*
- * This is the actual mm switch as far as the scheduler
- * is concerned. No registers are touched. We avoid
- * calling the CPU specific function when the mm hasn't
- * actually changed.
- */
-static inline void
-switch_mm(struct mm_struct *prev, struct mm_struct *next,
- struct task_struct *tsk)
+#ifdef CONFIG_ARM64_SW_TTBR0_PAN
+static inline void update_saved_ttbr0(struct task_struct *tsk,
+ struct mm_struct *mm)
{
- unsigned int cpu = smp_processor_id();
+ if (system_uses_ttbr0_pan()) {
+ BUG_ON(mm->pgd == swapper_pg_dir);
+ task_thread_info(tsk)->ttbr0 =
+ virt_to_phys(mm->pgd) | ASID(mm) << 48;
+ }
+}
+#else
+static inline void update_saved_ttbr0(struct task_struct *tsk,
+ struct mm_struct *mm)
+{
+}
+#endif
- if (prev == next)
- return;
+static inline void __switch_mm(struct mm_struct *next)
+{
+ unsigned int cpu = smp_processor_id();
/*
* init_mm.pgd does not contain any user mappings and it is always
@@ -200,7 +207,25 @@ switch_mm(struct mm_struct *prev, struct mm_struct *next,
check_and_switch_context(next, cpu);
}
+static inline void
+switch_mm(struct mm_struct *prev, struct mm_struct *next,
+ struct task_struct *tsk)
+{
+ if (prev != next)
+ __switch_mm(next);
+
+ /*
+ * Update the saved TTBR0_EL1 of the scheduled-in task as the previous
+ * value may have not been initialised yet (activate_mm caller) or the
+ * ASID has changed since the last run (following the context switch
+ * of another thread of the same process). Avoid setting the reserved
+ * TTBR0_EL1 to swapper_pg_dir (init_mm; e.g. via idle_task_exit).
+ */
+ if (next != &init_mm)
+ update_saved_ttbr0(tsk, next);
+}
+
#define deactivate_mm(tsk,mm) do { } while (0)
-#define activate_mm(prev,next) switch_mm(prev, next, NULL)
+#define activate_mm(prev,next) switch_mm(prev, next, current)
#endif
diff --git a/arch/arm64/include/asm/module.h b/arch/arm64/include/asm/module.h
index e12af6754634..06ff7fd9e81f 100644
--- a/arch/arm64/include/asm/module.h
+++ b/arch/arm64/include/asm/module.h
@@ -17,6 +17,7 @@
#define __ASM_MODULE_H
#include <asm-generic/module.h>
+#include <asm/memory.h>
#define MODULE_ARCH_VERMAGIC "aarch64"
@@ -32,6 +33,10 @@ u64 module_emit_plt_entry(struct module *mod, const Elf64_Rela *rela,
Elf64_Sym *sym);
#ifdef CONFIG_RANDOMIZE_BASE
+#ifdef CONFIG_MODVERSIONS
+#define ARCH_RELOCATES_KCRCTAB
+#define reloc_start (kimage_vaddr - KIMAGE_VADDR)
+#endif
extern u64 module_alloc_base;
#else
#define module_alloc_base ((u64)_etext - MODULES_VSIZE)
diff --git a/arch/arm64/include/asm/spinlock.h b/arch/arm64/include/asm/spinlock.h
index 53ee219e76a7..43a66881fd57 100644
--- a/arch/arm64/include/asm/spinlock.h
+++ b/arch/arm64/include/asm/spinlock.h
@@ -37,13 +37,17 @@ static inline void arch_spin_unlock_wait(arch_spinlock_t *lock)
"2: ldaxr %w0, %2\n"
" eor %w1, %w0, %w0, ror #16\n"
" cbnz %w1, 1b\n"
+ /* Serialise against any concurrent lockers */
ARM64_LSE_ATOMIC_INSN(
/* LL/SC */
" stxr %w1, %w0, %2\n"
-" cbnz %w1, 2b\n", /* Serialise against any concurrent lockers */
- /* LSE atomics */
" nop\n"
-" nop\n")
+" nop\n",
+ /* LSE atomics */
+" mov %w1, %w0\n"
+" cas %w0, %w0, %2\n"
+" eor %w1, %w1, %w0\n")
+" cbnz %w1, 2b\n"
: "=&r" (lockval), "=&r" (tmp), "+Q" (*lock)
:
: "memory");
diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h
index abd64bd1f6d9..794d22603f04 100644
--- a/arch/arm64/include/asm/thread_info.h
+++ b/arch/arm64/include/asm/thread_info.h
@@ -48,6 +48,9 @@ struct thread_info {
unsigned long flags; /* low level flags */
mm_segment_t addr_limit; /* address limit */
struct task_struct *task; /* main task structure */
+#ifdef CONFIG_ARM64_SW_TTBR0_PAN
+ u64 ttbr0; /* saved TTBR0_EL1 */
+#endif
int preempt_count; /* 0 => preemptable, <0 => bug */
int cpu; /* cpu */
};
diff --git a/arch/arm64/include/asm/topology.h b/arch/arm64/include/asm/topology.h
index a3e9d6fdbf21..bbd362cd1ed1 100644
--- a/arch/arm64/include/asm/topology.h
+++ b/arch/arm64/include/asm/topology.h
@@ -22,6 +22,15 @@ void init_cpu_topology(void);
void store_cpu_topology(unsigned int cpuid);
const struct cpumask *cpu_coregroup_mask(int cpu);
+struct sched_domain;
+#ifdef CONFIG_CPU_FREQ
+#define arch_scale_freq_capacity cpufreq_scale_freq_capacity
+extern unsigned long cpufreq_scale_freq_capacity(struct sched_domain *sd, int cpu);
+extern unsigned long cpufreq_scale_max_freq_capacity(int cpu);
+#endif
+#define arch_scale_cpu_capacity scale_cpu_capacity
+extern unsigned long scale_cpu_capacity(struct sched_domain *sd, int cpu);
+
#include <asm-generic/topology.h>
#endif /* _ASM_ARM_TOPOLOGY_H */
diff --git a/arch/arm64/include/asm/uaccess.h b/arch/arm64/include/asm/uaccess.h
index c3d445b42351..efafdf39cb3b 100644
--- a/arch/arm64/include/asm/uaccess.h
+++ b/arch/arm64/include/asm/uaccess.h
@@ -18,16 +18,20 @@
#ifndef __ASM_UACCESS_H
#define __ASM_UACCESS_H
+#include <asm/alternative.h>
+#include <asm/kernel-pgtable.h>
+#include <asm/sysreg.h>
+
+#ifndef __ASSEMBLY__
+
/*
* User space memory access functions
*/
#include <linux/string.h>
#include <linux/thread_info.h>
-#include <asm/alternative.h>
#include <asm/cpufeature.h>
#include <asm/ptrace.h>
-#include <asm/sysreg.h>
#include <asm/errno.h>
#include <asm/memory.h>
#include <asm/compiler.h>
@@ -124,6 +128,99 @@ static inline void set_fs(mm_segment_t fs)
" .popsection\n"
/*
+ * User access enabling/disabling.
+ */
+#ifdef CONFIG_ARM64_SW_TTBR0_PAN
+static inline void __uaccess_ttbr0_disable(void)
+{
+ unsigned long ttbr;
+
+ /* reserved_ttbr0 placed at the end of swapper_pg_dir */
+ ttbr = read_sysreg(ttbr1_el1) + SWAPPER_DIR_SIZE;
+ write_sysreg(ttbr, ttbr0_el1);
+ isb();
+}
+
+static inline void __uaccess_ttbr0_enable(void)
+{
+ unsigned long flags;
+
+ /*
+ * Disable interrupts to avoid preemption between reading the 'ttbr0'
+ * variable and the MSR. A context switch could trigger an ASID
+ * roll-over and an update of 'ttbr0'.
+ */
+ local_irq_save(flags);
+ write_sysreg(current_thread_info()->ttbr0, ttbr0_el1);
+ isb();
+ local_irq_restore(flags);
+}
+
+static inline bool uaccess_ttbr0_disable(void)
+{
+ if (!system_uses_ttbr0_pan())
+ return false;
+ __uaccess_ttbr0_disable();
+ return true;
+}
+
+static inline bool uaccess_ttbr0_enable(void)
+{
+ if (!system_uses_ttbr0_pan())
+ return false;
+ __uaccess_ttbr0_enable();
+ return true;
+}
+#else
+static inline bool uaccess_ttbr0_disable(void)
+{
+ return false;
+}
+
+static inline bool uaccess_ttbr0_enable(void)
+{
+ return false;
+}
+#endif
+
+#define __uaccess_disable(alt) \
+do { \
+ if (!uaccess_ttbr0_disable()) \
+ asm(ALTERNATIVE("nop", SET_PSTATE_PAN(1), alt, \
+ CONFIG_ARM64_PAN)); \
+} while (0)
+
+#define __uaccess_enable(alt) \
+do { \
+ if (!uaccess_ttbr0_enable()) \
+ asm(ALTERNATIVE("nop", SET_PSTATE_PAN(0), alt, \
+ CONFIG_ARM64_PAN)); \
+} while (0)
+
+static inline void uaccess_disable(void)
+{
+ __uaccess_disable(ARM64_HAS_PAN);
+}
+
+static inline void uaccess_enable(void)
+{
+ __uaccess_enable(ARM64_HAS_PAN);
+}
+
+/*
+ * These functions are no-ops when UAO is present.
+ */
+static inline void uaccess_disable_not_uao(void)
+{
+ __uaccess_disable(ARM64_ALT_PAN_NOT_UAO);
+}
+
+static inline void uaccess_enable_not_uao(void)
+{
+ __uaccess_enable(ARM64_ALT_PAN_NOT_UAO);
+}
+
+/*
* The "__xxx" versions of the user access functions do not verify the address
* space - it must have been done previously with a separate "access_ok()"
* call.
@@ -150,8 +247,7 @@ static inline void set_fs(mm_segment_t fs)
do { \
unsigned long __gu_val; \
__chk_user_ptr(ptr); \
- asm(ALTERNATIVE("nop", SET_PSTATE_PAN(0), ARM64_ALT_PAN_NOT_UAO,\
- CONFIG_ARM64_PAN)); \
+ uaccess_enable_not_uao(); \
switch (sizeof(*(ptr))) { \
case 1: \
__get_user_asm("ldrb", "ldtrb", "%w", __gu_val, (ptr), \
@@ -172,9 +268,8 @@ do { \
default: \
BUILD_BUG(); \
} \
+ uaccess_disable_not_uao(); \
(x) = (__force __typeof__(*(ptr)))__gu_val; \
- asm(ALTERNATIVE("nop", SET_PSTATE_PAN(1), ARM64_ALT_PAN_NOT_UAO,\
- CONFIG_ARM64_PAN)); \
} while (0)
#define __get_user(x, ptr) \
@@ -219,8 +314,7 @@ do { \
do { \
__typeof__(*(ptr)) __pu_val = (x); \
__chk_user_ptr(ptr); \
- asm(ALTERNATIVE("nop", SET_PSTATE_PAN(0), ARM64_ALT_PAN_NOT_UAO,\
- CONFIG_ARM64_PAN)); \
+ uaccess_enable_not_uao(); \
switch (sizeof(*(ptr))) { \
case 1: \
__put_user_asm("strb", "sttrb", "%w", __pu_val, (ptr), \
@@ -241,8 +335,7 @@ do { \
default: \
BUILD_BUG(); \
} \
- asm(ALTERNATIVE("nop", SET_PSTATE_PAN(1), ARM64_ALT_PAN_NOT_UAO,\
- CONFIG_ARM64_PAN)); \
+ uaccess_disable_not_uao(); \
} while (0)
#define __put_user(x, ptr) \
@@ -327,4 +420,66 @@ extern long strncpy_from_user(char *dest, const char __user *src, long count);
extern __must_check long strlen_user(const char __user *str);
extern __must_check long strnlen_user(const char __user *str, long n);
+#else /* __ASSEMBLY__ */
+
+#include <asm/assembler.h>
+
+/*
+ * User access enabling/disabling macros.
+ */
+#ifdef CONFIG_ARM64_SW_TTBR0_PAN
+ .macro __uaccess_ttbr0_disable, tmp1
+ mrs \tmp1, ttbr1_el1 // swapper_pg_dir
+ add \tmp1, \tmp1, #SWAPPER_DIR_SIZE // reserved_ttbr0 at the end of swapper_pg_dir
+ msr ttbr0_el1, \tmp1 // set reserved TTBR0_EL1
+ isb
+ .endm
+
+ .macro __uaccess_ttbr0_enable, tmp1
+ get_thread_info \tmp1
+ ldr \tmp1, [\tmp1, #TSK_TI_TTBR0] // load saved TTBR0_EL1
+ msr ttbr0_el1, \tmp1 // set the non-PAN TTBR0_EL1
+ isb
+ .endm
+
+ .macro uaccess_ttbr0_disable, tmp1
+alternative_if_not ARM64_HAS_PAN
+ __uaccess_ttbr0_disable \tmp1
+alternative_else_nop_endif
+ .endm
+
+ .macro uaccess_ttbr0_enable, tmp1, tmp2
+alternative_if_not ARM64_HAS_PAN
+ save_and_disable_irq \tmp2 // avoid preemption
+ __uaccess_ttbr0_enable \tmp1
+ restore_irq \tmp2
+alternative_else_nop_endif
+ .endm
+#else
+ .macro uaccess_ttbr0_disable, tmp1
+ .endm
+
+ .macro uaccess_ttbr0_enable, tmp1, tmp2
+ .endm
+#endif
+
+/*
+ * These macros are no-ops when UAO is present.
+ */
+ .macro uaccess_disable_not_uao, tmp1
+ uaccess_ttbr0_disable \tmp1
+alternative_if ARM64_ALT_PAN_NOT_UAO
+ SET_PSTATE_PAN(1)
+alternative_else_nop_endif
+ .endm
+
+ .macro uaccess_enable_not_uao, tmp1, tmp2
+ uaccess_ttbr0_enable \tmp1, \tmp2
+alternative_if ARM64_ALT_PAN_NOT_UAO
+ SET_PSTATE_PAN(0)
+alternative_else_nop_endif
+ .endm
+
+#endif /* __ASSEMBLY__ */
+
#endif /* __ASM_UACCESS_H */
diff --git a/arch/arm64/kernel/armv8_deprecated.c b/arch/arm64/kernel/armv8_deprecated.c
index 293489476529..884b317e56c3 100644
--- a/arch/arm64/kernel/armv8_deprecated.c
+++ b/arch/arm64/kernel/armv8_deprecated.c
@@ -14,7 +14,6 @@
#include <linux/slab.h>
#include <linux/sysctl.h>
-#include <asm/alternative.h>
#include <asm/cpufeature.h>
#include <asm/insn.h>
#include <asm/opcodes.h>
@@ -281,9 +280,9 @@ static void __init register_insn_emulation_sysctl(struct ctl_table *table)
* Error-checking SWP macros implemented using ldxr{b}/stxr{b}
*/
#define __user_swpX_asm(data, addr, res, temp, B) \
+do { \
+ uaccess_enable(); \
__asm__ __volatile__( \
- ALTERNATIVE("nop", SET_PSTATE_PAN(0), ARM64_HAS_PAN, \
- CONFIG_ARM64_PAN) \
"0: ldxr"B" %w2, [%3]\n" \
"1: stxr"B" %w0, %w1, [%3]\n" \
" cbz %w0, 2f\n" \
@@ -299,11 +298,11 @@ static void __init register_insn_emulation_sysctl(struct ctl_table *table)
" .popsection" \
_ASM_EXTABLE(0b, 4b) \
_ASM_EXTABLE(1b, 4b) \
- ALTERNATIVE("nop", SET_PSTATE_PAN(1), ARM64_HAS_PAN, \
- CONFIG_ARM64_PAN) \
: "=&r" (res), "+r" (data), "=&r" (temp) \
: "r" (addr), "i" (-EAGAIN), "i" (-EFAULT) \
- : "memory")
+ : "memory"); \
+ uaccess_disable(); \
+} while (0)
#define __user_swp_asm(data, addr, res, temp) \
__user_swpX_asm(data, addr, res, temp, "")
diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c
index 2bb17bd556f8..c9ea87198789 100644
--- a/arch/arm64/kernel/asm-offsets.c
+++ b/arch/arm64/kernel/asm-offsets.c
@@ -40,6 +40,9 @@ int main(void)
DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit));
DEFINE(TI_TASK, offsetof(struct thread_info, task));
DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
+#ifdef CONFIG_ARM64_SW_TTBR0_PAN
+ DEFINE(TSK_TI_TTBR0, offsetof(struct thread_info, ttbr0));
+#endif
BLANK();
DEFINE(THREAD_CPU_CONTEXT, offsetof(struct task_struct, thread.cpu_context));
BLANK();
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index eda7d5915fbb..cdf1dca64133 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -46,6 +46,7 @@ unsigned int compat_elf_hwcap2 __read_mostly;
#endif
DECLARE_BITMAP(cpu_hwcaps, ARM64_NCAPS);
+EXPORT_SYMBOL(cpu_hwcaps);
#define __ARM64_FTR_BITS(SIGNED, STRICT, TYPE, SHIFT, WIDTH, SAFE_VAL) \
{ \
diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c
index 4eeb17198cfa..b6abc852f2a1 100644
--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -11,317 +11,34 @@
*
*/
-#include <linux/atomic.h>
#include <linux/dmi.h>
#include <linux/efi.h>
-#include <linux/export.h>
-#include <linux/memblock.h>
-#include <linux/mm_types.h>
-#include <linux/bootmem.h>
-#include <linux/of.h>
-#include <linux/of_fdt.h>
-#include <linux/preempt.h>
-#include <linux/rbtree.h>
-#include <linux/rwsem.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
+#include <linux/init.h>
-#include <asm/cacheflush.h>
#include <asm/efi.h>
-#include <asm/tlbflush.h>
-#include <asm/mmu_context.h>
-#include <asm/mmu.h>
-#include <asm/pgtable.h>
-struct efi_memory_map memmap;
-
-static u64 efi_system_table;
-
-static pgd_t efi_pgd[PTRS_PER_PGD] __page_aligned_bss;
-
-static struct mm_struct efi_mm = {
- .mm_rb = RB_ROOT,
- .pgd = efi_pgd,
- .mm_users = ATOMIC_INIT(2),
- .mm_count = ATOMIC_INIT(1),
- .mmap_sem = __RWSEM_INITIALIZER(efi_mm.mmap_sem),
- .page_table_lock = __SPIN_LOCK_UNLOCKED(efi_mm.page_table_lock),
- .mmlist = LIST_HEAD_INIT(efi_mm.mmlist),
-};
-
-static int __init is_normal_ram(efi_memory_desc_t *md)
-{
- if (md->attribute & EFI_MEMORY_WB)
- return 1;
- return 0;
-}
-
-/*
- * Translate a EFI virtual address into a physical address: this is necessary,
- * as some data members of the EFI system table are virtually remapped after
- * SetVirtualAddressMap() has been called.
- */
-static phys_addr_t efi_to_phys(unsigned long addr)
+int __init efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md)
{
- efi_memory_desc_t *md;
-
- for_each_efi_memory_desc(&memmap, md) {
- if (!(md->attribute & EFI_MEMORY_RUNTIME))
- continue;
- if (md->virt_addr == 0)
- /* no virtual mapping has been installed by the stub */
- break;
- if (md->virt_addr <= addr &&
- (addr - md->virt_addr) < (md->num_pages << EFI_PAGE_SHIFT))
- return md->phys_addr + addr - md->virt_addr;
- }
- return addr;
-}
-
-static int __init uefi_init(void)
-{
- efi_char16_t *c16;
- void *config_tables;
- u64 table_size;
- char vendor[100] = "unknown";
- int i, retval;
-
- efi.systab = early_memremap(efi_system_table,
- sizeof(efi_system_table_t));
- if (efi.systab == NULL) {
- pr_warn("Unable to map EFI system table.\n");
- return -ENOMEM;
- }
-
- set_bit(EFI_BOOT, &efi.flags);
- set_bit(EFI_64BIT, &efi.flags);
+ pteval_t prot_val;
/*
- * Verify the EFI Table
+ * Only regions of type EFI_RUNTIME_SERVICES_CODE need to be
+ * executable, everything else can be mapped with the XN bits
+ * set.
*/
- if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) {
- pr_err("System table signature incorrect\n");
- retval = -EINVAL;
- goto out;
- }
- if ((efi.systab->hdr.revision >> 16) < 2)
- pr_warn("Warning: EFI system table version %d.%02d, expected 2.00 or greater\n",
- efi.systab->hdr.revision >> 16,
- efi.systab->hdr.revision & 0xffff);
-
- /* Show what we know for posterity */
- c16 = early_memremap(efi_to_phys(efi.systab->fw_vendor),
- sizeof(vendor) * sizeof(efi_char16_t));
- if (c16) {
- for (i = 0; i < (int) sizeof(vendor) - 1 && *c16; ++i)
- vendor[i] = c16[i];
- vendor[i] = '\0';
- early_memunmap(c16, sizeof(vendor) * sizeof(efi_char16_t));
- }
-
- pr_info("EFI v%u.%.02u by %s\n",
- efi.systab->hdr.revision >> 16,
- efi.systab->hdr.revision & 0xffff, vendor);
-
- table_size = sizeof(efi_config_table_64_t) * efi.systab->nr_tables;
- config_tables = early_memremap(efi_to_phys(efi.systab->tables),
- table_size);
- if (config_tables == NULL) {
- pr_warn("Unable to map EFI config table array.\n");
- retval = -ENOMEM;
- goto out;
- }
- retval = efi_config_parse_tables(config_tables, efi.systab->nr_tables,
- sizeof(efi_config_table_64_t), NULL);
-
- early_memunmap(config_tables, table_size);
-out:
- early_memunmap(efi.systab, sizeof(efi_system_table_t));
- return retval;
-}
-
-/*
- * Return true for RAM regions we want to permanently reserve.
- */
-static __init int is_reserve_region(efi_memory_desc_t *md)
-{
- switch (md->type) {
- case EFI_LOADER_CODE:
- case EFI_LOADER_DATA:
- case EFI_BOOT_SERVICES_CODE:
- case EFI_BOOT_SERVICES_DATA:
- case EFI_CONVENTIONAL_MEMORY:
- case EFI_PERSISTENT_MEMORY:
- return 0;
- default:
- break;
- }
- return is_normal_ram(md);
-}
-
-static __init void reserve_regions(void)
-{
- efi_memory_desc_t *md;
- u64 paddr, npages, size;
-
- if (efi_enabled(EFI_DBG))
- pr_info("Processing EFI memory map:\n");
-
- for_each_efi_memory_desc(&memmap, md) {
- paddr = md->phys_addr;
- npages = md->num_pages;
-
- if (efi_enabled(EFI_DBG)) {
- char buf[64];
-
- pr_info(" 0x%012llx-0x%012llx %s",
- paddr, paddr + (npages << EFI_PAGE_SHIFT) - 1,
- efi_md_typeattr_format(buf, sizeof(buf), md));
- }
-
- memrange_efi_to_native(&paddr, &npages);
- size = npages << PAGE_SHIFT;
-
- if (is_normal_ram(md))
- early_init_dt_add_memory_arch(paddr, size);
-
- if (is_reserve_region(md)) {
- memblock_reserve(paddr, size);
- if (efi_enabled(EFI_DBG))
- pr_cont("*");
- }
-
- if (efi_enabled(EFI_DBG))
- pr_cont("\n");
- }
-
- set_bit(EFI_MEMMAP, &efi.flags);
-}
-
-void __init efi_init(void)
-{
- struct efi_fdt_params params;
-
- /* Grab UEFI information placed in FDT by stub */
- if (!efi_get_fdt_params(&params))
- return;
-
- efi_system_table = params.system_table;
-
- memblock_reserve(params.mmap & PAGE_MASK,
- PAGE_ALIGN(params.mmap_size + (params.mmap & ~PAGE_MASK)));
- memmap.phys_map = params.mmap;
- memmap.map = early_memremap(params.mmap, params.mmap_size);
- if (memmap.map == NULL) {
- /*
- * If we are booting via UEFI, the UEFI memory map is the only
- * description of memory we have, so there is little point in
- * proceeding if we cannot access it.
- */
- panic("Unable to map EFI memory map.\n");
- }
- memmap.map_end = memmap.map + params.mmap_size;
- memmap.desc_size = params.desc_size;
- memmap.desc_version = params.desc_ver;
-
- if (uefi_init() < 0)
- return;
-
- reserve_regions();
- early_memunmap(memmap.map, params.mmap_size);
-}
-
-static bool __init efi_virtmap_init(void)
-{
- efi_memory_desc_t *md;
-
- init_new_context(NULL, &efi_mm);
-
- for_each_efi_memory_desc(&memmap, md) {
- pgprot_t prot;
-
- if (!(md->attribute & EFI_MEMORY_RUNTIME))
- continue;
- if (md->virt_addr == 0)
- return false;
-
- pr_info(" EFI remap 0x%016llx => %p\n",
- md->phys_addr, (void *)md->virt_addr);
-
- /*
- * Only regions of type EFI_RUNTIME_SERVICES_CODE need to be
- * executable, everything else can be mapped with the XN bits
- * set.
- */
- if (!is_normal_ram(md))
- prot = __pgprot(PROT_DEVICE_nGnRE);
- else if (md->type == EFI_RUNTIME_SERVICES_CODE ||
- !PAGE_ALIGNED(md->phys_addr))
- prot = PAGE_KERNEL_EXEC;
- else
- prot = PAGE_KERNEL;
-
- create_pgd_mapping(&efi_mm, md->phys_addr, md->virt_addr,
- md->num_pages << EFI_PAGE_SHIFT,
- __pgprot(pgprot_val(prot) | PTE_NG));
- }
- return true;
-}
-
-/*
- * Enable the UEFI Runtime Services if all prerequisites are in place, i.e.,
- * non-early mapping of the UEFI system table and virtual mappings for all
- * EFI_MEMORY_RUNTIME regions.
- */
-static int __init arm64_enable_runtime_services(void)
-{
- u64 mapsize;
-
- if (!efi_enabled(EFI_BOOT)) {
- pr_info("EFI services will not be available.\n");
- return 0;
- }
-
- if (efi_runtime_disabled()) {
- pr_info("EFI runtime services will be disabled.\n");
- return 0;
- }
-
- pr_info("Remapping and enabling EFI services.\n");
-
- mapsize = memmap.map_end - memmap.map;
- memmap.map = (__force void *)ioremap_cache(memmap.phys_map,
- mapsize);
- if (!memmap.map) {
- pr_err("Failed to remap EFI memory map\n");
- return -ENOMEM;
- }
- memmap.map_end = memmap.map + mapsize;
- efi.memmap = &memmap;
-
- efi.systab = (__force void *)ioremap_cache(efi_system_table,
- sizeof(efi_system_table_t));
- if (!efi.systab) {
- pr_err("Failed to remap EFI System Table\n");
- return -ENOMEM;
- }
- set_bit(EFI_SYSTEM_TABLES, &efi.flags);
-
- if (!efi_virtmap_init()) {
- pr_err("No UEFI virtual mapping was installed -- runtime services will not be available\n");
- return -ENOMEM;
- }
-
- /* Set up runtime services function pointers */
- efi_native_runtime_setup();
- set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
-
- efi.runtime_version = efi.systab->hdr.revision;
-
+ if ((md->attribute & EFI_MEMORY_WB) == 0)
+ prot_val = PROT_DEVICE_nGnRE;
+ else if (md->type == EFI_RUNTIME_SERVICES_CODE ||
+ !PAGE_ALIGNED(md->phys_addr))
+ prot_val = pgprot_val(PAGE_KERNEL_EXEC);
+ else
+ prot_val = pgprot_val(PAGE_KERNEL);
+
+ create_pgd_mapping(mm, md->phys_addr, md->virt_addr,
+ md->num_pages << EFI_PAGE_SHIFT,
+ __pgprot(prot_val | PTE_NG));
return 0;
}
-early_initcall(arm64_enable_runtime_services);
static int __init arm64_dmi_init(void)
{
@@ -337,23 +54,6 @@ static int __init arm64_dmi_init(void)
}
core_initcall(arm64_dmi_init);
-static void efi_set_pgd(struct mm_struct *mm)
-{
- switch_mm(NULL, mm, NULL);
-}
-
-void efi_virtmap_load(void)
-{
- preempt_disable();
- efi_set_pgd(&efi_mm);
-}
-
-void efi_virtmap_unload(void)
-{
- efi_set_pgd(current->active_mm);
- preempt_enable();
-}
-
/*
* UpdateCapsule() depends on the system being shutdown via
* ResetSystem().
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index a096d0980ade..ccac06a9f204 100644
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -29,7 +29,9 @@
#include <asm/esr.h>
#include <asm/irq.h>
#include <asm/memory.h>
+#include <asm/ptrace.h>
#include <asm/thread_info.h>
+#include <asm/uaccess.h>
#include <asm/unistd.h>
/*
@@ -108,6 +110,32 @@
mrs x22, elr_el1
mrs x23, spsr_el1
stp lr, x21, [sp, #S_LR]
+
+#ifdef CONFIG_ARM64_SW_TTBR0_PAN
+ /*
+ * Set the TTBR0 PAN bit in SPSR. When the exception is taken from
+ * EL0, there is no need to check the state of TTBR0_EL1 since
+ * accesses are always enabled.
+ * Note that the meaning of this bit differs from the ARMv8.1 PAN
+ * feature as all TTBR0_EL1 accesses are disabled, not just those to
+ * user mappings.
+ */
+alternative_if ARM64_HAS_PAN
+ b 1f // skip TTBR0 PAN
+alternative_else_nop_endif
+
+ .if \el != 0
+ mrs x21, ttbr0_el1
+ tst x21, #0xffff << 48 // Check for the reserved ASID
+ orr x23, x23, #PSR_PAN_BIT // Set the emulated PAN in the saved SPSR
+ b.eq 1f // TTBR0 access already disabled
+ and x23, x23, #~PSR_PAN_BIT // Clear the emulated PAN in the saved SPSR
+ .endif
+
+ __uaccess_ttbr0_disable x21
+1:
+#endif
+
stp x22, x23, [sp, #S_PC]
/*
@@ -144,6 +172,40 @@
ldp x21, x22, [sp, #S_PC] // load ELR, SPSR
.if \el == 0
ct_user_enter
+ .endif
+
+#ifdef CONFIG_ARM64_SW_TTBR0_PAN
+ /*
+ * Restore access to TTBR0_EL1. If returning to EL0, no need for SPSR
+ * PAN bit checking.
+ */
+alternative_if ARM64_HAS_PAN
+ b 2f // skip TTBR0 PAN
+alternative_else_nop_endif
+
+ .if \el != 0
+ tbnz x22, #22, 1f // Skip re-enabling TTBR0 access if the PSR_PAN_BIT is set
+ .endif
+
+ __uaccess_ttbr0_enable x0
+
+ .if \el == 0
+ /*
+ * Enable errata workarounds only if returning to user. The only
+ * workaround currently required for TTBR0_EL1 changes are for the
+ * Cavium erratum 27456 (broadcast TLBI instructions may cause I-cache
+ * corruption).
+ */
+ post_ttbr0_update_workaround
+ .endif
+1:
+ .if \el != 0
+ and x22, x22, #~PSR_PAN_BIT // ARMv8.0 CPUs do not understand this bit
+ .endif
+2:
+#endif
+
+ .if \el == 0
ldr x23, [sp, #S_SP] // load return stack pointer
msr sp_el0, x23
#ifdef CONFIG_ARM64_ERRATUM_845719
@@ -165,6 +227,7 @@ alternative_else
alternative_endif
#endif
.endif
+
msr elr_el1, x21 // set up the return data
msr spsr_el1, x22
ldp x0, x1, [sp, #16 * 0]
@@ -187,10 +250,6 @@ alternative_endif
eret // return to kernel
.endm
- .macro get_thread_info, rd
- mrs \rd, sp_el0
- .endm
-
.macro irq_stack_entry
mov x19, sp // preserve the original sp
@@ -291,7 +350,7 @@ END(vectors)
* Invalid mode handlers
*/
.macro inv_entry, el, reason, regsize = 64
- kernel_entry el, \regsize
+ kernel_entry \el, \regsize
mov x0, sp
mov x1, #\reason
mrs x2, esr_el1
@@ -350,6 +409,8 @@ el1_sync:
lsr x24, x1, #ESR_ELx_EC_SHIFT // exception class
cmp x24, #ESR_ELx_EC_DABT_CUR // data abort in EL1
b.eq el1_da
+ cmp x24, #ESR_ELx_EC_IABT_CUR // instruction abort in EL1
+ b.eq el1_ia
cmp x24, #ESR_ELx_EC_SYS64 // configurable trap
b.eq el1_undef
cmp x24, #ESR_ELx_EC_SP_ALIGN // stack alignment exception
@@ -361,6 +422,11 @@ el1_sync:
cmp x24, #ESR_ELx_EC_BREAKPT_CUR // debug exception in EL1
b.ge el1_dbg
b el1_inv
+
+el1_ia:
+ /*
+ * Fall through to the Data abort case
+ */
el1_da:
/*
* Data abort handling
@@ -546,7 +612,7 @@ el0_ia:
enable_dbg_and_irq
ct_user_exit
mov x0, x26
- orr x1, x25, #1 << 24 // use reserved ISS bit for instruction aborts
+ mov x1, x25
mov x2, sp
bl do_mem_abort
b ret_to_user
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index 029c466eaa4c..8cfd5ab37743 100644
--- a/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@ -318,14 +318,14 @@ __create_page_tables:
* dirty cache lines being evicted.
*/
mov x0, x25
- add x1, x26, #SWAPPER_DIR_SIZE
+ add x1, x26, #SWAPPER_DIR_SIZE + RESERVED_TTBR0_SIZE
bl __inval_cache_range
/*
* Clear the idmap and swapper page tables.
*/
mov x0, x25
- add x6, x26, #SWAPPER_DIR_SIZE
+ add x6, x26, #SWAPPER_DIR_SIZE + RESERVED_TTBR0_SIZE
1: stp xzr, xzr, [x0], #16
stp xzr, xzr, [x0], #16
stp xzr, xzr, [x0], #16
@@ -404,7 +404,7 @@ __create_page_tables:
* tables again to remove any speculatively loaded cache lines.
*/
mov x0, x25
- add x1, x26, #SWAPPER_DIR_SIZE
+ add x1, x26, #SWAPPER_DIR_SIZE + RESERVED_TTBR0_SIZE
dmb sy
bl __inval_cache_range
@@ -695,6 +695,9 @@ ENTRY(__enable_mmu)
isb
bl __create_page_tables // recreate kernel mapping
+ tlbi vmalle1 // Remove any stale TLB entries
+ dsb nsh
+
msr sctlr_el1, x19 // re-enable the MMU
isb
ic iallu // flush instructions fetched
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 80624829db61..6f3fb46170bf 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -165,6 +165,70 @@ void machine_restart(char *cmd)
while (1);
}
+/*
+ * dump a block of kernel memory from around the given address
+ */
+static void show_data(unsigned long addr, int nbytes, const char *name)
+{
+ int i, j;
+ int nlines;
+ u32 *p;
+
+ /*
+ * don't attempt to dump non-kernel addresses or
+ * values that are probably just small negative numbers
+ */
+ if (addr < PAGE_OFFSET || addr > -256UL)
+ return;
+
+ printk("\n%s: %#lx:\n", name, addr);
+
+ /*
+ * round address down to a 32 bit boundary
+ * and always dump a multiple of 32 bytes
+ */
+ p = (u32 *)(addr & ~(sizeof(u32) - 1));
+ nbytes += (addr & (sizeof(u32) - 1));
+ nlines = (nbytes + 31) / 32;
+
+
+ for (i = 0; i < nlines; i++) {
+ /*
+ * just display low 16 bits of address to keep
+ * each line of the dump < 80 characters
+ */
+ printk("%04lx ", (unsigned long)p & 0xffff);
+ for (j = 0; j < 8; j++) {
+ u32 data;
+ if (probe_kernel_address(p, data)) {
+ printk(" ********");
+ } else {
+ printk(" %08x", data);
+ }
+ ++p;
+ }
+ printk("\n");
+ }
+}
+
+static void show_extra_register_data(struct pt_regs *regs, int nbytes)
+{
+ mm_segment_t fs;
+ unsigned int i;
+
+ fs = get_fs();
+ set_fs(KERNEL_DS);
+ show_data(regs->pc - nbytes, nbytes * 2, "PC");
+ show_data(regs->regs[30] - nbytes, nbytes * 2, "LR");
+ show_data(regs->sp - nbytes, nbytes * 2, "SP");
+ for (i = 0; i < 30; i++) {
+ char name[4];
+ snprintf(name, sizeof(name), "X%u", i);
+ show_data(regs->regs[i] - nbytes, nbytes * 2, name);
+ }
+ set_fs(fs);
+}
+
void __show_regs(struct pt_regs *regs)
{
int i, top_reg;
@@ -191,6 +255,8 @@ void __show_regs(struct pt_regs *regs)
if (i % 2 == 0)
printk("\n");
}
+ if (!user_mode(regs))
+ show_extra_register_data(regs, 128);
printk("\n");
}
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 1e33d967c0ae..0153c0d8ddb1 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -201,7 +201,7 @@ static void __init request_standard_resources(void)
struct resource *res;
kernel_code.start = virt_to_phys(_text);
- kernel_code.end = virt_to_phys(_etext - 1);
+ kernel_code.end = virt_to_phys(__init_begin - 1);
kernel_data.start = virt_to_phys(_sdata);
kernel_data.end = virt_to_phys(_end - 1);
@@ -346,6 +346,15 @@ void __init setup_arch(char **cmdline_p)
smp_init_cpus();
smp_build_mpidr_hash();
+#ifdef CONFIG_ARM64_SW_TTBR0_PAN
+ /*
+ * Make sure init_thread_info.ttbr0 always generates translation
+ * faults in case uaccess_enable() is inadvertently called by the init
+ * thread.
+ */
+ init_thread_info.ttbr0 = virt_to_phys(empty_zero_page);
+#endif
+
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
conswitchp = &vga_con;
diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c
index 694f6deedbab..5b2c67a510d8 100644
--- a/arch/arm64/kernel/topology.c
+++ b/arch/arm64/kernel/topology.c
@@ -19,10 +19,30 @@
#include <linux/nodemask.h>
#include <linux/of.h>
#include <linux/sched.h>
+#include <linux/sched.h>
+#include <linux/sched_energy.h>
#include <asm/cputype.h>
#include <asm/topology.h>
+static DEFINE_PER_CPU(unsigned long, cpu_scale) = SCHED_CAPACITY_SCALE;
+
+unsigned long scale_cpu_capacity(struct sched_domain *sd, int cpu)
+{
+#ifdef CONFIG_CPU_FREQ
+ unsigned long max_freq_scale = cpufreq_scale_max_freq_capacity(cpu);
+
+ return per_cpu(cpu_scale, cpu) * max_freq_scale >> SCHED_CAPACITY_SHIFT;
+#else
+ return per_cpu(cpu_scale, cpu);
+#endif
+}
+
+static void set_capacity_scale(unsigned int cpu, unsigned long capacity)
+{
+ per_cpu(cpu_scale, cpu) = capacity;
+}
+
static int __init get_cpu_for_node(struct device_node *node)
{
struct device_node *cpu_node;
@@ -206,11 +226,67 @@ out:
struct cpu_topology cpu_topology[NR_CPUS];
EXPORT_SYMBOL_GPL(cpu_topology);
+/* sd energy functions */
+static inline
+const struct sched_group_energy * const cpu_cluster_energy(int cpu)
+{
+ struct sched_group_energy *sge = sge_array[cpu][SD_LEVEL1];
+
+ if (!sge) {
+ pr_warn("Invalid sched_group_energy for Cluster%d\n", cpu);
+ return NULL;
+ }
+
+ return sge;
+}
+
+static inline
+const struct sched_group_energy * const cpu_core_energy(int cpu)
+{
+ struct sched_group_energy *sge = sge_array[cpu][SD_LEVEL0];
+
+ if (!sge) {
+ pr_warn("Invalid sched_group_energy for CPU%d\n", cpu);
+ return NULL;
+ }
+
+ return sge;
+}
+
const struct cpumask *cpu_coregroup_mask(int cpu)
{
return &cpu_topology[cpu].core_sibling;
}
+static inline int cpu_corepower_flags(void)
+{
+ return SD_SHARE_PKG_RESOURCES | SD_SHARE_POWERDOMAIN | \
+ SD_SHARE_CAP_STATES;
+}
+
+static struct sched_domain_topology_level arm64_topology[] = {
+#ifdef CONFIG_SCHED_MC
+ { cpu_coregroup_mask, cpu_corepower_flags, cpu_core_energy, SD_INIT_NAME(MC) },
+#endif
+ { cpu_cpu_mask, NULL, cpu_cluster_energy, SD_INIT_NAME(DIE) },
+ { NULL, },
+};
+
+static void update_cpu_capacity(unsigned int cpu)
+{
+ unsigned long capacity = SCHED_CAPACITY_SCALE;
+
+ if (cpu_core_energy(cpu)) {
+ int max_cap_idx = cpu_core_energy(cpu)->nr_cap_states - 1;
+ capacity = cpu_core_energy(cpu)->cap_states[max_cap_idx].cap;
+ }
+
+ set_capacity_scale(cpu, capacity);
+
+ pr_info("CPU%d: update cpu_capacity %lu\n",
+ cpu, arch_scale_cpu_capacity(NULL, cpu));
+}
+
static void update_siblings_masks(unsigned int cpuid)
{
struct cpu_topology *cpu_topo, *cpuid_topo = &cpu_topology[cpuid];
@@ -272,6 +348,7 @@ void store_cpu_topology(unsigned int cpuid)
topology_populated:
update_siblings_masks(cpuid);
+ update_cpu_capacity(cpuid);
}
static void __init reset_cpu_topology(void)
@@ -302,4 +379,8 @@ void __init init_cpu_topology(void)
*/
if (of_have_populated_dt() && parse_dt_topology())
reset_cpu_topology();
+ else
+ set_sched_topology(arm64_topology);
+
+ init_sched_energy_costs();
}
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index a036ff290d69..f5c82c76cf7c 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -64,8 +64,7 @@ static void dump_mem(const char *lvl, const char *str, unsigned long bottom,
/*
* We need to switch to kernel mode so that we can use __get_user
- * to safely read from kernel space. Note that we now dump the
- * code first, just in case the backtrace kills us.
+ * to safely read from kernel space.
*/
fs = get_fs();
set_fs(KERNEL_DS);
@@ -111,21 +110,12 @@ static void dump_backtrace_entry(unsigned long where)
print_ip_sym(where);
}
-static void dump_instr(const char *lvl, struct pt_regs *regs)
+static void __dump_instr(const char *lvl, struct pt_regs *regs)
{
unsigned long addr = instruction_pointer(regs);
- mm_segment_t fs;
char str[sizeof("00000000 ") * 5 + 2 + 1], *p = str;
int i;
- /*
- * We need to switch to kernel mode so that we can use __get_user
- * to safely read from kernel space. Note that we now dump the
- * code first, just in case the backtrace kills us.
- */
- fs = get_fs();
- set_fs(KERNEL_DS);
-
for (i = -4; i < 1; i++) {
unsigned int val, bad;
@@ -139,8 +129,18 @@ static void dump_instr(const char *lvl, struct pt_regs *regs)
}
}
printk("%sCode: %s\n", lvl, str);
+}
- set_fs(fs);
+static void dump_instr(const char *lvl, struct pt_regs *regs)
+{
+ if (!user_mode(regs)) {
+ mm_segment_t fs = get_fs();
+ set_fs(KERNEL_DS);
+ __dump_instr(lvl, regs);
+ set_fs(fs);
+ } else {
+ __dump_instr(lvl, regs);
+ }
}
static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
@@ -465,7 +465,7 @@ static const char *esr_class_str[] = {
const char *esr_get_class_string(u32 esr)
{
- return esr_class_str[esr >> ESR_ELx_EC_SHIFT];
+ return esr_class_str[ESR_ELx_EC(esr)];
}
/*
diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
index 623532f44323..7a5228c7abdd 100644
--- a/arch/arm64/kernel/vmlinux.lds.S
+++ b/arch/arm64/kernel/vmlinux.lds.S
@@ -133,12 +133,13 @@ SECTIONS
}
. = ALIGN(SEGMENT_ALIGN);
- RO_DATA(PAGE_SIZE) /* everything from this point to */
- EXCEPTION_TABLE(8) /* _etext will be marked RO NX */
+ _etext = .; /* End of text section */
+
+ RO_DATA(PAGE_SIZE) /* everything from this point to */
+ EXCEPTION_TABLE(8) /* __init_begin will be marked RO NX */
NOTES
. = ALIGN(SEGMENT_ALIGN);
- _etext = .; /* End of text and rodata section */
__init_begin = .;
INIT_TEXT_SECTION(8)
@@ -193,6 +194,11 @@ SECTIONS
swapper_pg_dir = .;
. += SWAPPER_DIR_SIZE;
+#ifdef CONFIG_ARM64_SW_TTBR0_PAN
+ reserved_ttbr0 = .;
+ . += RESERVED_TTBR0_SIZE;
+#endif
+
_end = .;
STABS_DEBUG
diff --git a/arch/arm64/lib/clear_user.S b/arch/arm64/lib/clear_user.S
index 5d1cad3ce6d6..d7150e30438a 100644
--- a/arch/arm64/lib/clear_user.S
+++ b/arch/arm64/lib/clear_user.S
@@ -17,10 +17,7 @@
*/
#include <linux/linkage.h>
-#include <asm/alternative.h>
-#include <asm/assembler.h>
-#include <asm/cpufeature.h>
-#include <asm/sysreg.h>
+#include <asm/uaccess.h>
.text
@@ -33,8 +30,7 @@
* Alignment fixed up by hardware.
*/
ENTRY(__clear_user)
-ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(0)), ARM64_ALT_PAN_NOT_UAO, \
- CONFIG_ARM64_PAN)
+ uaccess_enable_not_uao x2, x3
mov x2, x1 // save the size for fixup return
subs x1, x1, #8
b.mi 2f
@@ -54,8 +50,7 @@ uao_user_alternative 9f, strh, sttrh, wzr, x0, 2
b.mi 5f
uao_user_alternative 9f, strb, sttrb, wzr, x0, 0
5: mov x0, #0
-ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(1)), ARM64_ALT_PAN_NOT_UAO, \
- CONFIG_ARM64_PAN)
+ uaccess_disable_not_uao x2
ret
ENDPROC(__clear_user)
diff --git a/arch/arm64/lib/copy_from_user.S b/arch/arm64/lib/copy_from_user.S
index 0b90497d4424..90154f3f7f2a 100644
--- a/arch/arm64/lib/copy_from_user.S
+++ b/arch/arm64/lib/copy_from_user.S
@@ -16,11 +16,8 @@
#include <linux/linkage.h>
-#include <asm/alternative.h>
-#include <asm/assembler.h>
#include <asm/cache.h>
-#include <asm/cpufeature.h>
-#include <asm/sysreg.h>
+#include <asm/uaccess.h>
/*
* Copy from user space to a kernel buffer (alignment handled by the hardware)
@@ -67,12 +64,10 @@
end .req x5
ENTRY(__arch_copy_from_user)
-ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(0)), ARM64_ALT_PAN_NOT_UAO, \
- CONFIG_ARM64_PAN)
+ uaccess_enable_not_uao x3, x4
add end, x0, x2
#include "copy_template.S"
-ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(1)), ARM64_ALT_PAN_NOT_UAO, \
- CONFIG_ARM64_PAN)
+ uaccess_disable_not_uao x3
mov x0, #0 // Nothing to copy
ret
ENDPROC(__arch_copy_from_user)
diff --git a/arch/arm64/lib/copy_in_user.S b/arch/arm64/lib/copy_in_user.S
index f7292dd08c84..718b1c4e2f85 100644
--- a/arch/arm64/lib/copy_in_user.S
+++ b/arch/arm64/lib/copy_in_user.S
@@ -18,11 +18,8 @@
#include <linux/linkage.h>
-#include <asm/alternative.h>
-#include <asm/assembler.h>
#include <asm/cache.h>
-#include <asm/cpufeature.h>
-#include <asm/sysreg.h>
+#include <asm/uaccess.h>
/*
* Copy from user space to user space (alignment handled by the hardware)
@@ -68,12 +65,10 @@
end .req x5
ENTRY(__copy_in_user)
-ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(0)), ARM64_ALT_PAN_NOT_UAO, \
- CONFIG_ARM64_PAN)
+ uaccess_enable_not_uao x3, x4
add end, x0, x2
#include "copy_template.S"
-ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(1)), ARM64_ALT_PAN_NOT_UAO, \
- CONFIG_ARM64_PAN)
+ uaccess_disable_not_uao x3
mov x0, #0
ret
ENDPROC(__copy_in_user)
diff --git a/arch/arm64/lib/copy_to_user.S b/arch/arm64/lib/copy_to_user.S
index 7a7efe255034..e99e31c9acac 100644
--- a/arch/arm64/lib/copy_to_user.S
+++ b/arch/arm64/lib/copy_to_user.S
@@ -16,11 +16,8 @@
#include <linux/linkage.h>
-#include <asm/alternative.h>
-#include <asm/assembler.h>
#include <asm/cache.h>
-#include <asm/cpufeature.h>
-#include <asm/sysreg.h>
+#include <asm/uaccess.h>
/*
* Copy to user space from a kernel buffer (alignment handled by the hardware)
@@ -66,12 +63,10 @@
end .req x5
ENTRY(__arch_copy_to_user)
-ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(0)), ARM64_ALT_PAN_NOT_UAO, \
- CONFIG_ARM64_PAN)
+ uaccess_enable_not_uao x3, x4
add end, x0, x2
#include "copy_template.S"
-ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(1)), ARM64_ALT_PAN_NOT_UAO, \
- CONFIG_ARM64_PAN)
+ uaccess_disable_not_uao x3
mov x0, #0
ret
ENDPROC(__arch_copy_to_user)
diff --git a/arch/arm64/mm/cache.S b/arch/arm64/mm/cache.S
index 50ff9ba3a236..3be2cda5dbda 100644
--- a/arch/arm64/mm/cache.S
+++ b/arch/arm64/mm/cache.S
@@ -23,6 +23,7 @@
#include <asm/assembler.h>
#include <asm/cpufeature.h>
#include <asm/alternative.h>
+#include <asm/uaccess.h>
/*
* flush_icache_range(start,end)
@@ -48,11 +49,12 @@ ENTRY(flush_icache_range)
* - end - virtual end address of region
*/
ENTRY(__flush_cache_user_range)
+ uaccess_ttbr0_enable x2, x3
dcache_line_size x2, x3
sub x3, x2, #1
bic x4, x0, x3
1:
-USER(9f, dc cvau, x4 ) // clean D line to PoU
+user_alt 9f, "dc cvau, x4", "dc civac, x4", ARM64_WORKAROUND_CLEAN_CACHE
add x4, x4, x2
cmp x4, x1
b.lo 1b
@@ -69,10 +71,12 @@ USER(9f, ic ivau, x4 ) // invalidate I line PoU
dsb ish
isb
mov x0, #0
+1:
+ uaccess_ttbr0_disable x1
ret
9:
mov x0, #-EFAULT
- ret
+ b 1b
ENDPROC(flush_icache_range)
ENDPROC(__flush_cache_user_range)
diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index 7275628ba59f..25128089c386 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -182,7 +182,12 @@ void check_and_switch_context(struct mm_struct *mm, unsigned int cpu)
raw_spin_unlock_irqrestore(&cpu_asid_lock, flags);
switch_mm_fastpath:
- cpu_switch_mm(mm->pgd, mm);
+ /*
+ * Defer TTBR0_EL1 setting for user threads to uaccess_enable() when
+ * emulating PAN.
+ */
+ if (!system_uses_ttbr0_pan())
+ cpu_switch_mm(mm->pgd, mm);
}
static int asids_init(void)
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index a6e757cbab77..925b2b3a06f8 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -170,7 +170,7 @@ static void *__dma_alloc(struct device *dev, size_t size,
/* create a coherent mapping */
page = virt_to_page(ptr);
coherent_ptr = dma_common_contiguous_remap(page, size, VM_USERMAP,
- prot, NULL);
+ prot, __builtin_return_address(0));
if (!coherent_ptr)
goto no_map;
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 18e5a2c3d554..02c121b2acc4 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -155,6 +155,11 @@ int ptep_set_access_flags(struct vm_area_struct *vma,
}
#endif
+static bool is_el1_instruction_abort(unsigned int esr)
+{
+ return ESR_ELx_EC(esr) == ESR_ELx_EC_IABT_CUR;
+}
+
/*
* The kernel tried to access some page that wasn't present.
*/
@@ -163,8 +168,9 @@ static void __do_kernel_fault(struct mm_struct *mm, unsigned long addr,
{
/*
* Are we prepared to handle this kernel fault?
+ * We are almost certainly not prepared to handle instruction faults.
*/
- if (fixup_exception(regs))
+ if (!is_el1_instruction_abort(esr) && fixup_exception(regs))
return;
/*
@@ -226,8 +232,6 @@ static void do_bad_area(unsigned long addr, unsigned int esr, struct pt_regs *re
#define VM_FAULT_BADMAP 0x010000
#define VM_FAULT_BADACCESS 0x020000
-#define ESR_LNX_EXEC (1 << 24)
-
static int __do_page_fault(struct mm_struct *mm, unsigned long addr,
unsigned int mm_flags, unsigned long vm_flags,
struct task_struct *tsk)
@@ -266,12 +270,24 @@ out:
return fault;
}
-static inline int permission_fault(unsigned int esr)
+static inline bool is_permission_fault(unsigned int esr, struct pt_regs *regs)
{
- unsigned int ec = (esr & ESR_ELx_EC_MASK) >> ESR_ELx_EC_SHIFT;
+ unsigned int ec = ESR_ELx_EC(esr);
unsigned int fsc_type = esr & ESR_ELx_FSC_TYPE;
- return (ec == ESR_ELx_EC_DABT_CUR && fsc_type == ESR_ELx_FSC_PERM);
+ if (ec != ESR_ELx_EC_DABT_CUR && ec != ESR_ELx_EC_IABT_CUR)
+ return false;
+
+ if (system_uses_ttbr0_pan())
+ return fsc_type == ESR_ELx_FSC_FAULT &&
+ (regs->pstate & PSR_PAN_BIT);
+ else
+ return fsc_type == ESR_ELx_FSC_PERM;
+}
+
+static bool is_el0_instruction_abort(unsigned int esr)
+{
+ return ESR_ELx_EC(esr) == ESR_ELx_EC_IABT_LOW;
}
static int __kprobes do_page_fault(unsigned long addr, unsigned int esr,
@@ -303,17 +319,20 @@ static int __kprobes do_page_fault(unsigned long addr, unsigned int esr,
if (user_mode(regs))
mm_flags |= FAULT_FLAG_USER;
- if (esr & ESR_LNX_EXEC) {
+ if (is_el0_instruction_abort(esr)) {
vm_flags = VM_EXEC;
} else if ((esr & ESR_ELx_WNR) && !(esr & ESR_ELx_CM)) {
vm_flags = VM_WRITE;
mm_flags |= FAULT_FLAG_WRITE;
}
- if (permission_fault(esr) && (addr < USER_DS)) {
+ if (addr < USER_DS && is_permission_fault(esr, regs)) {
if (get_fs() == KERNEL_DS)
die("Accessing user space memory with fs=KERNEL_DS", regs, esr);
+ if (is_el1_instruction_abort(esr))
+ die("Attempting to execute userspace memory", regs, esr);
+
if (!search_exception_tables(regs->pc))
die("Accessing user space memory outside uaccess.h routines", regs, esr);
}
@@ -465,7 +484,7 @@ static int do_bad(unsigned long addr, unsigned int esr, struct pt_regs *regs)
return 1;
}
-static struct fault_info {
+static const struct fault_info {
int (*fn)(unsigned long addr, unsigned int esr, struct pt_regs *regs);
int sig;
int code;
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 75728047b60b..678878077996 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -127,9 +127,11 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max)
}
#ifdef CONFIG_HAVE_ARCH_PFN_VALID
+#define PFN_MASK ((1UL << (64 - PAGE_SHIFT)) - 1)
+
int pfn_valid(unsigned long pfn)
{
- return memblock_is_memory(pfn << PAGE_SHIFT);
+ return (pfn & PFN_MASK) == pfn && memblock_is_map_memory(pfn << PAGE_SHIFT);
}
EXPORT_SYMBOL(pfn_valid);
#endif
@@ -190,8 +192,12 @@ void __init arm64_memblock_init(void)
*/
memblock_remove(max_t(u64, memstart_addr + linear_region_size, __pa(_end)),
ULLONG_MAX);
- if (memblock_end_of_DRAM() > linear_region_size)
- memblock_remove(0, memblock_end_of_DRAM() - linear_region_size);
+ if (memstart_addr + linear_region_size < memblock_end_of_DRAM()) {
+ /* ensure that memstart_addr remains sufficiently aligned */
+ memstart_addr = round_up(memblock_end_of_DRAM() - linear_region_size,
+ ARM64_MEMSTART_ALIGN);
+ memblock_remove(0, memstart_addr);
+ }
/*
* Apply the memory limit if it was set. Since the kernel may be loaded
@@ -385,8 +391,8 @@ void __init mem_init(void)
MLM(MODULES_VADDR, MODULES_END),
MLG(VMALLOC_START, VMALLOC_END),
MLK_ROUNDUP(__init_begin, __init_end),
- MLK_ROUNDUP(_text, __start_rodata),
- MLK_ROUNDUP(__start_rodata, _etext),
+ MLK_ROUNDUP(_text, _etext),
+ MLK_ROUNDUP(__start_rodata, __init_begin),
MLK_ROUNDUP(_sdata, _edata),
#ifdef CONFIG_SPARSEMEM_VMEMMAP
MLG(VMEMMAP_START,
diff --git a/arch/arm64/mm/mmap.c b/arch/arm64/mm/mmap.c
index ed177475dd8c..232f787a088a 100644
--- a/arch/arm64/mm/mmap.c
+++ b/arch/arm64/mm/mmap.c
@@ -51,8 +51,12 @@ unsigned long arch_mmap_rnd(void)
{
unsigned long rnd;
- rnd = (unsigned long)get_random_int() & STACK_RND_MASK;
-
+#ifdef CONFIG_COMPAT
+ if (test_thread_flag(TIF_32BIT))
+ rnd = get_random_long() & ((1UL << mmap_rnd_compat_bits) - 1);
+ else
+#endif
+ rnd = get_random_long() & ((1UL << mmap_rnd_bits) - 1);
return rnd << PAGE_SHIFT;
}
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 8fc302d84e1f..1cab2703f5a8 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -386,14 +386,14 @@ static void create_mapping_late(phys_addr_t phys, unsigned long virt,
static void __init __map_memblock(pgd_t *pgd, phys_addr_t start, phys_addr_t end)
{
unsigned long kernel_start = __pa(_text);
- unsigned long kernel_end = __pa(_etext);
+ unsigned long kernel_end = __pa(__init_begin);
/*
* Take care not to create a writable alias for the
* read-only text and rodata sections of the kernel image.
*/
- /* No overlap with the kernel text */
+ /* No overlap with the kernel text/rodata */
if (end < kernel_start || start >= kernel_end) {
__create_pgd_mapping(pgd, start, __phys_to_virt(start),
end - start, PAGE_KERNEL,
@@ -402,7 +402,7 @@ static void __init __map_memblock(pgd_t *pgd, phys_addr_t start, phys_addr_t end
}
/*
- * This block overlaps the kernel text mapping.
+ * This block overlaps the kernel text/rodata mappings.
* Map the portion(s) which don't overlap.
*/
if (start < kernel_start)
@@ -417,7 +417,7 @@ static void __init __map_memblock(pgd_t *pgd, phys_addr_t start, phys_addr_t end
early_pgtable_alloc);
/*
- * Map the linear alias of the [_text, _etext) interval as
+ * Map the linear alias of the [_text, __init_begin) interval as
* read-only/non-executable. This makes the contents of the
* region accessible to subsystems such as hibernate, but
* protects it from inadvertent modification or execution.
@@ -438,6 +438,8 @@ static void __init map_mem(pgd_t *pgd)
if (start >= end)
break;
+ if (memblock_is_nomap(reg))
+ continue;
__map_memblock(pgd, start, end);
}
@@ -447,14 +449,14 @@ void mark_rodata_ro(void)
{
unsigned long section_size;
- section_size = (unsigned long)__start_rodata - (unsigned long)_text;
+ section_size = (unsigned long)_etext - (unsigned long)_text;
create_mapping_late(__pa(_text), (unsigned long)_text,
section_size, PAGE_KERNEL_ROX);
/*
- * mark .rodata as read only. Use _etext rather than __end_rodata to
- * cover NOTES and EXCEPTION_TABLE.
+ * mark .rodata as read only. Use __init_begin rather than __end_rodata
+ * to cover NOTES and EXCEPTION_TABLE.
*/
- section_size = (unsigned long)_etext - (unsigned long)__start_rodata;
+ section_size = (unsigned long)__init_begin - (unsigned long)__start_rodata;
create_mapping_late(__pa(__start_rodata), (unsigned long)__start_rodata,
section_size, PAGE_KERNEL_RO);
}
@@ -497,8 +499,8 @@ static void __init map_kernel(pgd_t *pgd)
{
static struct vm_struct vmlinux_text, vmlinux_rodata, vmlinux_init, vmlinux_data;
- map_kernel_segment(pgd, _text, __start_rodata, PAGE_KERNEL_EXEC, &vmlinux_text);
- map_kernel_segment(pgd, __start_rodata, _etext, PAGE_KERNEL, &vmlinux_rodata);
+ map_kernel_segment(pgd, _text, _etext, PAGE_KERNEL_EXEC, &vmlinux_text);
+ map_kernel_segment(pgd, __start_rodata, __init_begin, PAGE_KERNEL, &vmlinux_rodata);
map_kernel_segment(pgd, __init_begin, __init_end, PAGE_KERNEL_EXEC,
&vmlinux_init);
map_kernel_segment(pgd, _data, _end, PAGE_KERNEL, &vmlinux_data);
diff --git a/arch/arm64/mm/proc-macros.S b/arch/arm64/mm/proc-macros.S
deleted file mode 100644
index 984edcda1850..000000000000
--- a/arch/arm64/mm/proc-macros.S
+++ /dev/null
@@ -1,98 +0,0 @@
-/*
- * Based on arch/arm/mm/proc-macros.S
- *
- * Copyright (C) 2012 ARM Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <asm/asm-offsets.h>
-#include <asm/thread_info.h>
-
-/*
- * vma_vm_mm - get mm pointer from vma pointer (vma->vm_mm)
- */
- .macro vma_vm_mm, rd, rn
- ldr \rd, [\rn, #VMA_VM_MM]
- .endm
-
-/*
- * mmid - get context id from mm pointer (mm->context.id)
- */
- .macro mmid, rd, rn
- ldr \rd, [\rn, #MM_CONTEXT_ID]
- .endm
-
-/*
- * dcache_line_size - get the minimum D-cache line size from the CTR register.
- */
- .macro dcache_line_size, reg, tmp
- mrs \tmp, ctr_el0 // read CTR
- ubfm \tmp, \tmp, #16, #19 // cache line size encoding
- mov \reg, #4 // bytes per word
- lsl \reg, \reg, \tmp // actual cache line size
- .endm
-
-/*
- * icache_line_size - get the minimum I-cache line size from the CTR register.
- */
- .macro icache_line_size, reg, tmp
- mrs \tmp, ctr_el0 // read CTR
- and \tmp, \tmp, #0xf // cache line size encoding
- mov \reg, #4 // bytes per word
- lsl \reg, \reg, \tmp // actual cache line size
- .endm
-
-/*
- * tcr_set_idmap_t0sz - update TCR.T0SZ so that we can load the ID map
- */
- .macro tcr_set_idmap_t0sz, valreg, tmpreg
-#ifndef CONFIG_ARM64_VA_BITS_48
- ldr_l \tmpreg, idmap_t0sz
- bfi \valreg, \tmpreg, #TCR_T0SZ_OFFSET, #TCR_TxSZ_WIDTH
-#endif
- .endm
-
-/*
- * reset_pmuserenr_el0 - reset PMUSERENR_EL0 if PMUv3 present
- */
- .macro reset_pmuserenr_el0, tmpreg
- mrs \tmpreg, id_aa64dfr0_el1 // Check ID_AA64DFR0_EL1 PMUVer
- sbfx \tmpreg, \tmpreg, #8, #4
- cmp \tmpreg, #1 // Skip if no PMU present
- b.lt 9000f
- msr pmuserenr_el0, xzr // Disable PMU access from EL0
-9000:
- .endm
-
-/*
- * Macro to perform a data cache maintenance for the interval
- * [kaddr, kaddr + size)
- *
- * op: operation passed to dc instruction
- * domain: domain used in dsb instruciton
- * kaddr: starting virtual address of the region
- * size: size of the region
- * Corrupts: kaddr, size, tmp1, tmp2
- */
- .macro dcache_by_line_op op, domain, kaddr, size, tmp1, tmp2
- dcache_line_size \tmp1, \tmp2
- add \size, \kaddr, \size
- sub \tmp2, \tmp1, #1
- bic \kaddr, \kaddr, \tmp2
-9998: dc \op, \kaddr
- add \kaddr, \kaddr, \tmp1
- cmp \kaddr, \size
- b.lo 9998b
- dsb \domain
- .endm
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
index 5bb61de23201..8292784d44c9 100644
--- a/arch/arm64/mm/proc.S
+++ b/arch/arm64/mm/proc.S
@@ -125,17 +125,8 @@ ENTRY(cpu_do_switch_mm)
bfi x0, x1, #48, #16 // set the ASID
msr ttbr0_el1, x0 // set TTBR0
isb
-alternative_if_not ARM64_WORKAROUND_CAVIUM_27456
+ post_ttbr0_update_workaround
ret
- nop
- nop
- nop
-alternative_else
- ic iallu
- dsb nsh
- isb
- ret
-alternative_endif
ENDPROC(cpu_do_switch_mm)
.pushsection ".idmap.text", "ax"
diff --git a/arch/arm64/xen/hypercall.S b/arch/arm64/xen/hypercall.S
index 8bbe9401f4f0..b96db5dafec4 100644
--- a/arch/arm64/xen/hypercall.S
+++ b/arch/arm64/xen/hypercall.S
@@ -49,6 +49,7 @@
#include <linux/linkage.h>
#include <asm/assembler.h>
+#include <asm/uaccess.h>
#include <xen/interface/xen.h>
@@ -89,6 +90,20 @@ ENTRY(privcmd_call)
mov x2, x3
mov x3, x4
mov x4, x5
+ /*
+ * Privcmd calls are issued by the userspace. The kernel needs to
+ * enable access to TTBR0_EL1 as the hypervisor would issue stage 1
+ * translations to user memory via AT instructions. Since AT
+ * instructions are not affected by the PAN bit (ARMv8.1), we only
+ * need the explicit uaccess_enable/disable if the TTBR0 PAN emulation
+ * is enabled (it implies that hardware UAO and PAN disabled).
+ */
+ uaccess_ttbr0_enable x6, x7
hvc XEN_IMM
+
+ /*
+ * Disable userspace access from kernel once the hyp call completed.
+ */
+ uaccess_ttbr0_disable x6
ret
ENDPROC(privcmd_call);
diff --git a/arch/ia64/include/asm/early_ioremap.h b/arch/ia64/include/asm/early_ioremap.h
new file mode 100644
index 000000000000..eec9e1d1b833
--- /dev/null
+++ b/arch/ia64/include/asm/early_ioremap.h
@@ -0,0 +1,10 @@
+#ifndef _ASM_IA64_EARLY_IOREMAP_H
+#define _ASM_IA64_EARLY_IOREMAP_H
+
+extern void __iomem * early_ioremap (unsigned long phys_addr, unsigned long size);
+#define early_memremap(phys_addr, size) early_ioremap(phys_addr, size)
+
+extern void early_iounmap (volatile void __iomem *addr, unsigned long size);
+#define early_memunmap(addr, size) early_iounmap(addr, size)
+
+#endif
diff --git a/arch/ia64/include/asm/io.h b/arch/ia64/include/asm/io.h
index 8fdb9c7eeb66..5de673ac9cb1 100644
--- a/arch/ia64/include/asm/io.h
+++ b/arch/ia64/include/asm/io.h
@@ -20,6 +20,7 @@
*/
#include <asm/unaligned.h>
+#include <asm/early_ioremap.h>
/* We don't use IO slowdowns on the ia64, but.. */
#define __SLOW_DOWN_IO do { } while (0)
@@ -427,10 +428,6 @@ __writeq (unsigned long val, volatile void __iomem *addr)
extern void __iomem * ioremap(unsigned long offset, unsigned long size);
extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size);
extern void iounmap (volatile void __iomem *addr);
-extern void __iomem * early_ioremap (unsigned long phys_addr, unsigned long size);
-#define early_memremap(phys_addr, size) early_ioremap(phys_addr, size)
-extern void early_iounmap (volatile void __iomem *addr, unsigned long size);
-#define early_memunmap(addr, size) early_iounmap(addr, size)
static inline void __iomem * ioremap_cache (unsigned long phys_addr, unsigned long size)
{
return ioremap(phys_addr, size);
diff --git a/arch/mips/mm/mmap.c b/arch/mips/mm/mmap.c
index 5c81fdd032c3..353037699512 100644
--- a/arch/mips/mm/mmap.c
+++ b/arch/mips/mm/mmap.c
@@ -146,7 +146,7 @@ unsigned long arch_mmap_rnd(void)
{
unsigned long rnd;
- rnd = (unsigned long)get_random_int();
+ rnd = get_random_long();
rnd <<= PAGE_SHIFT;
if (TASK_IS_32BIT_ADDR)
rnd &= 0xfffffful;
@@ -174,7 +174,7 @@ void arch_pick_mmap_layout(struct mm_struct *mm)
static inline unsigned long brk_rnd(void)
{
- unsigned long rnd = get_random_int();
+ unsigned long rnd = get_random_long();
rnd = rnd << PAGE_SHIFT;
/* 8MB for 32bit, 256MB for 64bit */
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index cf788d7d7e56..b7abf3cd2a67 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1651,9 +1651,9 @@ static inline unsigned long brk_rnd(void)
/* 8MB for 32bit, 1GB for 64bit */
if (is_32bit_task())
- rnd = (long)(get_random_int() % (1<<(23-PAGE_SHIFT)));
+ rnd = (get_random_long() % (1UL<<(23-PAGE_SHIFT)));
else
- rnd = (long)(get_random_int() % (1<<(30-PAGE_SHIFT)));
+ rnd = (get_random_long() % (1UL<<(30-PAGE_SHIFT)));
return rnd << PAGE_SHIFT;
}
diff --git a/arch/powerpc/mm/mmap.c b/arch/powerpc/mm/mmap.c
index 0f0502e12f6c..4087705ba90f 100644
--- a/arch/powerpc/mm/mmap.c
+++ b/arch/powerpc/mm/mmap.c
@@ -59,9 +59,9 @@ unsigned long arch_mmap_rnd(void)
/* 8MB for 32bit, 1GB for 64bit */
if (is_32bit_task())
- rnd = (unsigned long)get_random_int() % (1<<(23-PAGE_SHIFT));
+ rnd = get_random_long() % (1<<(23-PAGE_SHIFT));
else
- rnd = (unsigned long)get_random_int() % (1<<(30-PAGE_SHIFT));
+ rnd = get_random_long() % (1UL<<(30-PAGE_SHIFT));
return rnd << PAGE_SHIFT;
}
diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c
index c690c8e16a96..b489e9759518 100644
--- a/arch/sparc/kernel/sys_sparc_64.c
+++ b/arch/sparc/kernel/sys_sparc_64.c
@@ -264,7 +264,7 @@ static unsigned long mmap_rnd(void)
unsigned long rnd = 0UL;
if (current->flags & PF_RANDOMIZE) {
- unsigned long val = get_random_int();
+ unsigned long val = get_random_long();
if (test_thread_flag(TIF_32BIT))
rnd = (val % (1UL << (23UL-PAGE_SHIFT)));
else
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 924bbffc56f0..68143221db30 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -46,6 +46,8 @@ config X86
select ARCH_WANTS_DYNAMIC_TASK_STRUCT
select ARCH_WANT_FRAME_POINTERS
select ARCH_WANT_IPC_PARSE_VERSION if X86_32
+ select HAVE_ARCH_MMAP_RND_BITS if MMU
+ select HAVE_ARCH_MMAP_RND_COMPAT_BITS if MMU && COMPAT
select ARCH_WANT_OPTIONAL_GPIOLIB
select BUILDTIME_EXTABLE_SORT
select CLKEVT_I8253
@@ -184,6 +186,20 @@ config HAVE_LATENCYTOP_SUPPORT
config MMU
def_bool y
+config ARCH_MMAP_RND_BITS_MIN
+ default 28 if 64BIT
+ default 8
+
+config ARCH_MMAP_RND_BITS_MAX
+ default 32 if 64BIT
+ default 16
+
+config ARCH_MMAP_RND_COMPAT_BITS_MIN
+ default 8
+
+config ARCH_MMAP_RND_COMPAT_BITS_MAX
+ default 16
+
config SBUS
bool
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 4086abca0b32..53949c886341 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -97,6 +97,8 @@ else
KBUILD_CFLAGS += $(call cc-option,-mno-80387)
KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)
+ KBUILD_CFLAGS += -fno-pic
+
# Use -mpreferred-stack-boundary=3 if supported.
KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3)
diff --git a/arch/x86/configs/i386_ranchu_defconfig b/arch/x86/configs/i386_ranchu_defconfig
new file mode 100644
index 000000000000..65ed8c8f8444
--- /dev/null
+++ b/arch/x86/configs/i386_ranchu_defconfig
@@ -0,0 +1,423 @@
+# CONFIG_64BIT is not set
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_POSIX_MQUEUE=y
+CONFIG_AUDIT=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_TASKSTATS=y
+CONFIG_TASK_DELAY_ACCT=y
+CONFIG_TASK_XACCT=y
+CONFIG_TASK_IO_ACCOUNTING=y
+CONFIG_CGROUPS=y
+CONFIG_CGROUP_DEBUG=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_CGROUP_SCHED=y
+CONFIG_RT_GROUP_SCHED=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_SYSCTL_SYSCALL=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_EMBEDDED=y
+# CONFIG_COMPAT_BRK is not set
+CONFIG_ARCH_MMAP_RND_BITS=16
+CONFIG_PARTITION_ADVANCED=y
+CONFIG_OSF_PARTITION=y
+CONFIG_AMIGA_PARTITION=y
+CONFIG_MAC_PARTITION=y
+CONFIG_BSD_DISKLABEL=y
+CONFIG_MINIX_SUBPARTITION=y
+CONFIG_SOLARIS_X86_PARTITION=y
+CONFIG_UNIXWARE_DISKLABEL=y
+CONFIG_SGI_PARTITION=y
+CONFIG_SUN_PARTITION=y
+CONFIG_KARMA_PARTITION=y
+CONFIG_SMP=y
+CONFIG_X86_BIGSMP=y
+CONFIG_MCORE2=y
+CONFIG_X86_GENERIC=y
+CONFIG_HPET_TIMER=y
+CONFIG_NR_CPUS=512
+CONFIG_PREEMPT=y
+# CONFIG_X86_MCE is not set
+CONFIG_X86_REBOOTFIXUPS=y
+CONFIG_X86_MSR=y
+CONFIG_X86_CPUID=y
+CONFIG_KSM=y
+CONFIG_CMA=y
+# CONFIG_MTRR_SANITIZER is not set
+CONFIG_EFI=y
+CONFIG_EFI_STUB=y
+CONFIG_HZ_100=y
+CONFIG_PHYSICAL_START=0x100000
+CONFIG_PM_AUTOSLEEP=y
+CONFIG_PM_WAKELOCKS=y
+CONFIG_PM_WAKELOCKS_LIMIT=0
+# CONFIG_PM_WAKELOCKS_GC is not set
+CONFIG_PM_DEBUG=y
+CONFIG_CPU_FREQ=y
+# CONFIG_CPU_FREQ_STAT is not set
+CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
+CONFIG_CPU_FREQ_GOV_USERSPACE=y
+CONFIG_PCIEPORTBUS=y
+# CONFIG_PCIEASPM is not set
+CONFIG_PCCARD=y
+CONFIG_YENTA=y
+CONFIG_HOTPLUG_PCI=y
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+CONFIG_BINFMT_MISC=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_XFRM_USER=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_ADVANCED_ROUTER=y
+CONFIG_IP_MULTIPLE_TABLES=y
+CONFIG_IP_ROUTE_MULTIPATH=y
+CONFIG_IP_ROUTE_VERBOSE=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+CONFIG_IP_MROUTE=y
+CONFIG_IP_PIMSM_V1=y
+CONFIG_IP_PIMSM_V2=y
+CONFIG_SYN_COOKIES=y
+CONFIG_INET_ESP=y
+# CONFIG_INET_XFRM_MODE_BEET is not set
+# CONFIG_INET_LRO is not set
+CONFIG_INET_DIAG_DESTROY=y
+CONFIG_IPV6_ROUTER_PREF=y
+CONFIG_IPV6_ROUTE_INFO=y
+CONFIG_IPV6_OPTIMISTIC_DAD=y
+CONFIG_INET6_AH=y
+CONFIG_INET6_ESP=y
+CONFIG_INET6_IPCOMP=y
+CONFIG_IPV6_MIP6=y
+CONFIG_IPV6_MULTIPLE_TABLES=y
+CONFIG_NETLABEL=y
+CONFIG_NETFILTER=y
+CONFIG_NF_CONNTRACK=y
+CONFIG_NF_CONNTRACK_SECMARK=y
+CONFIG_NF_CONNTRACK_EVENTS=y
+CONFIG_NF_CT_PROTO_DCCP=y
+CONFIG_NF_CT_PROTO_SCTP=y
+CONFIG_NF_CT_PROTO_UDPLITE=y
+CONFIG_NF_CONNTRACK_AMANDA=y
+CONFIG_NF_CONNTRACK_FTP=y
+CONFIG_NF_CONNTRACK_H323=y
+CONFIG_NF_CONNTRACK_IRC=y
+CONFIG_NF_CONNTRACK_NETBIOS_NS=y
+CONFIG_NF_CONNTRACK_PPTP=y
+CONFIG_NF_CONNTRACK_SANE=y
+CONFIG_NF_CONNTRACK_TFTP=y
+CONFIG_NF_CT_NETLINK=y
+CONFIG_NETFILTER_XT_TARGET_CLASSIFY=y
+CONFIG_NETFILTER_XT_TARGET_CONNMARK=y
+CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=y
+CONFIG_NETFILTER_XT_TARGET_IDLETIMER=y
+CONFIG_NETFILTER_XT_TARGET_MARK=y
+CONFIG_NETFILTER_XT_TARGET_NFLOG=y
+CONFIG_NETFILTER_XT_TARGET_NFQUEUE=y
+CONFIG_NETFILTER_XT_TARGET_TPROXY=y
+CONFIG_NETFILTER_XT_TARGET_TRACE=y
+CONFIG_NETFILTER_XT_TARGET_SECMARK=y
+CONFIG_NETFILTER_XT_TARGET_TCPMSS=y
+CONFIG_NETFILTER_XT_MATCH_COMMENT=y
+CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=y
+CONFIG_NETFILTER_XT_MATCH_CONNMARK=y
+CONFIG_NETFILTER_XT_MATCH_CONNTRACK=y
+CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=y
+CONFIG_NETFILTER_XT_MATCH_HELPER=y
+CONFIG_NETFILTER_XT_MATCH_IPRANGE=y
+CONFIG_NETFILTER_XT_MATCH_LENGTH=y
+CONFIG_NETFILTER_XT_MATCH_LIMIT=y
+CONFIG_NETFILTER_XT_MATCH_MAC=y
+CONFIG_NETFILTER_XT_MATCH_MARK=y
+CONFIG_NETFILTER_XT_MATCH_POLICY=y
+CONFIG_NETFILTER_XT_MATCH_PKTTYPE=y
+CONFIG_NETFILTER_XT_MATCH_QTAGUID=y
+CONFIG_NETFILTER_XT_MATCH_QUOTA=y
+CONFIG_NETFILTER_XT_MATCH_QUOTA2=y
+CONFIG_NETFILTER_XT_MATCH_SOCKET=y
+CONFIG_NETFILTER_XT_MATCH_STATE=y
+CONFIG_NETFILTER_XT_MATCH_STATISTIC=y
+CONFIG_NETFILTER_XT_MATCH_STRING=y
+CONFIG_NETFILTER_XT_MATCH_TIME=y
+CONFIG_NETFILTER_XT_MATCH_U32=y
+CONFIG_NF_CONNTRACK_IPV4=y
+CONFIG_IP_NF_IPTABLES=y
+CONFIG_IP_NF_MATCH_AH=y
+CONFIG_IP_NF_MATCH_ECN=y
+CONFIG_IP_NF_MATCH_TTL=y
+CONFIG_IP_NF_FILTER=y
+CONFIG_IP_NF_TARGET_REJECT=y
+CONFIG_IP_NF_MANGLE=y
+CONFIG_IP_NF_RAW=y
+CONFIG_IP_NF_SECURITY=y
+CONFIG_IP_NF_ARPTABLES=y
+CONFIG_IP_NF_ARPFILTER=y
+CONFIG_IP_NF_ARP_MANGLE=y
+CONFIG_NF_CONNTRACK_IPV6=y
+CONFIG_IP6_NF_IPTABLES=y
+CONFIG_IP6_NF_FILTER=y
+CONFIG_IP6_NF_TARGET_REJECT=y
+CONFIG_IP6_NF_MANGLE=y
+CONFIG_IP6_NF_RAW=y
+CONFIG_NET_SCHED=y
+CONFIG_NET_SCH_HTB=y
+CONFIG_NET_CLS_U32=y
+CONFIG_NET_EMATCH=y
+CONFIG_NET_EMATCH_U32=y
+CONFIG_NET_CLS_ACT=y
+CONFIG_CFG80211=y
+CONFIG_MAC80211=y
+CONFIG_MAC80211_LEDS=y
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_DMA_CMA=y
+CONFIG_CMA_SIZE_MBYTES=16
+CONFIG_CONNECTOR=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_SIZE=8192
+CONFIG_VIRTIO_BLK=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_BLK_DEV_SR=y
+CONFIG_BLK_DEV_SR_VENDOR=y
+CONFIG_CHR_DEV_SG=y
+CONFIG_SCSI_CONSTANTS=y
+CONFIG_SCSI_SPI_ATTRS=y
+CONFIG_SCSI_ISCSI_ATTRS=y
+# CONFIG_SCSI_LOWLEVEL is not set
+CONFIG_ATA=y
+CONFIG_SATA_AHCI=y
+CONFIG_ATA_PIIX=y
+CONFIG_PATA_AMD=y
+CONFIG_PATA_OLDPIIX=y
+CONFIG_PATA_SCH=y
+CONFIG_PATA_MPIIX=y
+CONFIG_ATA_GENERIC=y
+CONFIG_MD=y
+CONFIG_BLK_DEV_MD=y
+CONFIG_BLK_DEV_DM=y
+CONFIG_DM_DEBUG=y
+CONFIG_DM_CRYPT=y
+CONFIG_DM_MIRROR=y
+CONFIG_DM_ZERO=y
+CONFIG_DM_UEVENT=y
+CONFIG_DM_VERITY=y
+CONFIG_DM_VERITY_FEC=y
+CONFIG_NETDEVICES=y
+CONFIG_NETCONSOLE=y
+CONFIG_TUN=y
+CONFIG_VIRTIO_NET=y
+CONFIG_BNX2=y
+CONFIG_TIGON3=y
+CONFIG_NET_TULIP=y
+CONFIG_E100=y
+CONFIG_E1000=y
+CONFIG_E1000E=y
+CONFIG_SKY2=y
+CONFIG_NE2K_PCI=y
+CONFIG_FORCEDETH=y
+CONFIG_8139TOO=y
+# CONFIG_8139TOO_PIO is not set
+CONFIG_R8169=y
+CONFIG_FDDI=y
+CONFIG_PPP=y
+CONFIG_PPP_BSDCOMP=y
+CONFIG_PPP_DEFLATE=y
+CONFIG_PPP_MPPE=y
+CONFIG_PPPOLAC=y
+CONFIG_PPPOPNS=y
+CONFIG_USB_USBNET=y
+CONFIG_INPUT_POLLDEV=y
+# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
+CONFIG_INPUT_EVDEV=y
+CONFIG_INPUT_KEYRESET=y
+# CONFIG_KEYBOARD_ATKBD is not set
+CONFIG_KEYBOARD_GOLDFISH_EVENTS=y
+# CONFIG_INPUT_MOUSE is not set
+CONFIG_INPUT_JOYSTICK=y
+CONFIG_JOYSTICK_XPAD=y
+CONFIG_JOYSTICK_XPAD_FF=y
+CONFIG_JOYSTICK_XPAD_LEDS=y
+CONFIG_INPUT_TABLET=y
+CONFIG_TABLET_USB_ACECAD=y
+CONFIG_TABLET_USB_AIPTEK=y
+CONFIG_TABLET_USB_GTCO=y
+CONFIG_TABLET_USB_HANWANG=y
+CONFIG_TABLET_USB_KBTAB=y
+CONFIG_INPUT_TOUCHSCREEN=y
+CONFIG_INPUT_MISC=y
+CONFIG_INPUT_KEYCHORD=y
+CONFIG_INPUT_UINPUT=y
+CONFIG_INPUT_GPIO=y
+# CONFIG_SERIO is not set
+# CONFIG_VT is not set
+# CONFIG_LEGACY_PTYS is not set
+CONFIG_SERIAL_NONSTANDARD=y
+# CONFIG_DEVMEM is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_NVRAM=y
+CONFIG_I2C_I801=y
+CONFIG_BATTERY_GOLDFISH=y
+CONFIG_WATCHDOG=y
+CONFIG_MEDIA_SUPPORT=y
+CONFIG_AGP=y
+CONFIG_AGP_AMD64=y
+CONFIG_AGP_INTEL=y
+CONFIG_DRM=y
+CONFIG_FB_MODE_HELPERS=y
+CONFIG_FB_TILEBLITTING=y
+CONFIG_FB_EFI=y
+CONFIG_FB_GOLDFISH=y
+CONFIG_BACKLIGHT_LCD_SUPPORT=y
+# CONFIG_LCD_CLASS_DEVICE is not set
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_HIDRAW=y
+CONFIG_UHID=y
+CONFIG_HID_A4TECH=y
+CONFIG_HID_ACRUX=y
+CONFIG_HID_ACRUX_FF=y
+CONFIG_HID_APPLE=y
+CONFIG_HID_BELKIN=y
+CONFIG_HID_CHERRY=y
+CONFIG_HID_CHICONY=y
+CONFIG_HID_PRODIKEYS=y
+CONFIG_HID_CYPRESS=y
+CONFIG_HID_DRAGONRISE=y
+CONFIG_DRAGONRISE_FF=y
+CONFIG_HID_EMS_FF=y
+CONFIG_HID_ELECOM=y
+CONFIG_HID_EZKEY=y
+CONFIG_HID_HOLTEK=y
+CONFIG_HID_KEYTOUCH=y
+CONFIG_HID_KYE=y
+CONFIG_HID_UCLOGIC=y
+CONFIG_HID_WALTOP=y
+CONFIG_HID_GYRATION=y
+CONFIG_HID_TWINHAN=y
+CONFIG_HID_KENSINGTON=y
+CONFIG_HID_LCPOWER=y
+CONFIG_HID_LOGITECH=y
+CONFIG_HID_LOGITECH_DJ=y
+CONFIG_LOGITECH_FF=y
+CONFIG_LOGIRUMBLEPAD2_FF=y
+CONFIG_LOGIG940_FF=y
+CONFIG_HID_MAGICMOUSE=y
+CONFIG_HID_MICROSOFT=y
+CONFIG_HID_MONTEREY=y
+CONFIG_HID_MULTITOUCH=y
+CONFIG_HID_NTRIG=y
+CONFIG_HID_ORTEK=y
+CONFIG_HID_PANTHERLORD=y
+CONFIG_PANTHERLORD_FF=y
+CONFIG_HID_PETALYNX=y
+CONFIG_HID_PICOLCD=y
+CONFIG_HID_PRIMAX=y
+CONFIG_HID_ROCCAT=y
+CONFIG_HID_SAITEK=y
+CONFIG_HID_SAMSUNG=y
+CONFIG_HID_SONY=y
+CONFIG_HID_SPEEDLINK=y
+CONFIG_HID_SUNPLUS=y
+CONFIG_HID_GREENASIA=y
+CONFIG_GREENASIA_FF=y
+CONFIG_HID_SMARTJOYPLUS=y
+CONFIG_SMARTJOYPLUS_FF=y
+CONFIG_HID_TIVO=y
+CONFIG_HID_TOPSEED=y
+CONFIG_HID_THRUSTMASTER=y
+CONFIG_HID_WACOM=y
+CONFIG_HID_WIIMOTE=y
+CONFIG_HID_ZEROPLUS=y
+CONFIG_HID_ZYDACRON=y
+CONFIG_HID_PID=y
+CONFIG_USB_HIDDEV=y
+CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
+CONFIG_USB_MON=y
+CONFIG_USB_EHCI_HCD=y
+# CONFIG_USB_EHCI_TT_NEWSCHED is not set
+CONFIG_USB_OHCI_HCD=y
+CONFIG_USB_UHCI_HCD=y
+CONFIG_USB_PRINTER=y
+CONFIG_USB_STORAGE=y
+CONFIG_USB_OTG_WAKELOCK=y
+CONFIG_EDAC=y
+CONFIG_RTC_CLASS=y
+# CONFIG_RTC_HCTOSYS is not set
+CONFIG_DMADEVICES=y
+CONFIG_VIRTIO_PCI=y
+CONFIG_STAGING=y
+CONFIG_ASHMEM=y
+CONFIG_ANDROID_LOW_MEMORY_KILLER=y
+CONFIG_SYNC=y
+CONFIG_SW_SYNC=y
+CONFIG_ION=y
+CONFIG_GOLDFISH_AUDIO=y
+CONFIG_GOLDFISH_SYNC=y
+CONFIG_SND_HDA_INTEL=y
+CONFIG_GOLDFISH=y
+CONFIG_GOLDFISH_PIPE=y
+CONFIG_ANDROID=y
+CONFIG_ANDROID_BINDER_IPC=y
+CONFIG_ISCSI_IBFT_FIND=y
+CONFIG_EXT4_FS=y
+CONFIG_EXT4_FS_SECURITY=y
+CONFIG_QUOTA=y
+CONFIG_QUOTA_NETLINK_INTERFACE=y
+# CONFIG_PRINT_QUOTA_WARNING is not set
+CONFIG_FUSE_FS=y
+CONFIG_ISO9660_FS=y
+CONFIG_JOLIET=y
+CONFIG_ZISOFS=y
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=y
+CONFIG_PROC_KCORE=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_HUGETLBFS=y
+CONFIG_PSTORE=y
+CONFIG_PSTORE_CONSOLE=y
+CONFIG_PSTORE_RAM=y
+# CONFIG_NETWORK_FILESYSTEMS is not set
+CONFIG_NLS_DEFAULT="utf8"
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ASCII=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_NLS_UTF8=y
+CONFIG_PRINTK_TIME=y
+CONFIG_DEBUG_INFO=y
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_FRAME_WARN=2048
+# CONFIG_UNUSED_SYMBOLS is not set
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_DEBUG_MEMORY_INIT=y
+CONFIG_PANIC_TIMEOUT=5
+CONFIG_SCHEDSTATS=y
+CONFIG_TIMER_STATS=y
+CONFIG_SCHED_TRACER=y
+CONFIG_BLK_DEV_IO_TRACE=y
+CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
+CONFIG_KEYS=y
+CONFIG_SECURITY=y
+CONFIG_SECURITY_NETWORK=y
+CONFIG_SECURITY_SELINUX=y
+CONFIG_CRYPTO_AES_586=y
+CONFIG_CRYPTO_TWOFISH=y
+CONFIG_ASYMMETRIC_KEY_TYPE=y
+CONFIG_ASYMMETRIC_PUBLIC_KEY_SUBTYPE=y
+CONFIG_X509_CERTIFICATE_PARSER=y
+CONFIG_PKCS7_MESSAGE_PARSER=y
+CONFIG_PKCS7_TEST_KEY=y
+# CONFIG_VIRTUALIZATION is not set
+CONFIG_CRC_T10DIF=y
diff --git a/arch/x86/configs/x86_64_ranchu_defconfig b/arch/x86/configs/x86_64_ranchu_defconfig
new file mode 100644
index 000000000000..d977bd91e390
--- /dev/null
+++ b/arch/x86/configs/x86_64_ranchu_defconfig
@@ -0,0 +1,418 @@
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_POSIX_MQUEUE=y
+CONFIG_AUDIT=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_TASKSTATS=y
+CONFIG_TASK_DELAY_ACCT=y
+CONFIG_TASK_XACCT=y
+CONFIG_TASK_IO_ACCOUNTING=y
+CONFIG_CGROUPS=y
+CONFIG_CGROUP_DEBUG=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_CGROUP_SCHED=y
+CONFIG_RT_GROUP_SCHED=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_SYSCTL_SYSCALL=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_EMBEDDED=y
+# CONFIG_COMPAT_BRK is not set
+CONFIG_ARCH_MMAP_RND_BITS=32
+CONFIG_ARCH_MMAP_RND_COMPAT_BITS=16
+CONFIG_PARTITION_ADVANCED=y
+CONFIG_OSF_PARTITION=y
+CONFIG_AMIGA_PARTITION=y
+CONFIG_MAC_PARTITION=y
+CONFIG_BSD_DISKLABEL=y
+CONFIG_MINIX_SUBPARTITION=y
+CONFIG_SOLARIS_X86_PARTITION=y
+CONFIG_UNIXWARE_DISKLABEL=y
+CONFIG_SGI_PARTITION=y
+CONFIG_SUN_PARTITION=y
+CONFIG_KARMA_PARTITION=y
+CONFIG_SMP=y
+CONFIG_MCORE2=y
+CONFIG_MAXSMP=y
+CONFIG_PREEMPT=y
+# CONFIG_X86_MCE is not set
+CONFIG_X86_MSR=y
+CONFIG_X86_CPUID=y
+CONFIG_KSM=y
+CONFIG_CMA=y
+# CONFIG_MTRR_SANITIZER is not set
+CONFIG_EFI=y
+CONFIG_EFI_STUB=y
+CONFIG_HZ_100=y
+CONFIG_PHYSICAL_START=0x100000
+CONFIG_PM_AUTOSLEEP=y
+CONFIG_PM_WAKELOCKS=y
+CONFIG_PM_WAKELOCKS_LIMIT=0
+# CONFIG_PM_WAKELOCKS_GC is not set
+CONFIG_PM_DEBUG=y
+CONFIG_CPU_FREQ=y
+# CONFIG_CPU_FREQ_STAT is not set
+CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
+CONFIG_CPU_FREQ_GOV_USERSPACE=y
+CONFIG_PCI_MMCONFIG=y
+CONFIG_PCIEPORTBUS=y
+# CONFIG_PCIEASPM is not set
+CONFIG_PCCARD=y
+CONFIG_YENTA=y
+CONFIG_HOTPLUG_PCI=y
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+CONFIG_BINFMT_MISC=y
+CONFIG_IA32_EMULATION=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_XFRM_USER=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_ADVANCED_ROUTER=y
+CONFIG_IP_MULTIPLE_TABLES=y
+CONFIG_IP_ROUTE_MULTIPATH=y
+CONFIG_IP_ROUTE_VERBOSE=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+CONFIG_IP_MROUTE=y
+CONFIG_IP_PIMSM_V1=y
+CONFIG_IP_PIMSM_V2=y
+CONFIG_SYN_COOKIES=y
+CONFIG_INET_ESP=y
+# CONFIG_INET_XFRM_MODE_BEET is not set
+# CONFIG_INET_LRO is not set
+CONFIG_INET_DIAG_DESTROY=y
+CONFIG_IPV6_ROUTER_PREF=y
+CONFIG_IPV6_ROUTE_INFO=y
+CONFIG_IPV6_OPTIMISTIC_DAD=y
+CONFIG_INET6_AH=y
+CONFIG_INET6_ESP=y
+CONFIG_INET6_IPCOMP=y
+CONFIG_IPV6_MIP6=y
+CONFIG_IPV6_MULTIPLE_TABLES=y
+CONFIG_NETLABEL=y
+CONFIG_NETFILTER=y
+CONFIG_NF_CONNTRACK=y
+CONFIG_NF_CONNTRACK_SECMARK=y
+CONFIG_NF_CONNTRACK_EVENTS=y
+CONFIG_NF_CT_PROTO_DCCP=y
+CONFIG_NF_CT_PROTO_SCTP=y
+CONFIG_NF_CT_PROTO_UDPLITE=y
+CONFIG_NF_CONNTRACK_AMANDA=y
+CONFIG_NF_CONNTRACK_FTP=y
+CONFIG_NF_CONNTRACK_H323=y
+CONFIG_NF_CONNTRACK_IRC=y
+CONFIG_NF_CONNTRACK_NETBIOS_NS=y
+CONFIG_NF_CONNTRACK_PPTP=y
+CONFIG_NF_CONNTRACK_SANE=y
+CONFIG_NF_CONNTRACK_TFTP=y
+CONFIG_NF_CT_NETLINK=y
+CONFIG_NETFILTER_XT_TARGET_CLASSIFY=y
+CONFIG_NETFILTER_XT_TARGET_CONNMARK=y
+CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=y
+CONFIG_NETFILTER_XT_TARGET_IDLETIMER=y
+CONFIG_NETFILTER_XT_TARGET_MARK=y
+CONFIG_NETFILTER_XT_TARGET_NFLOG=y
+CONFIG_NETFILTER_XT_TARGET_NFQUEUE=y
+CONFIG_NETFILTER_XT_TARGET_TPROXY=y
+CONFIG_NETFILTER_XT_TARGET_TRACE=y
+CONFIG_NETFILTER_XT_TARGET_SECMARK=y
+CONFIG_NETFILTER_XT_TARGET_TCPMSS=y
+CONFIG_NETFILTER_XT_MATCH_COMMENT=y
+CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=y
+CONFIG_NETFILTER_XT_MATCH_CONNMARK=y
+CONFIG_NETFILTER_XT_MATCH_CONNTRACK=y
+CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=y
+CONFIG_NETFILTER_XT_MATCH_HELPER=y
+CONFIG_NETFILTER_XT_MATCH_IPRANGE=y
+CONFIG_NETFILTER_XT_MATCH_LENGTH=y
+CONFIG_NETFILTER_XT_MATCH_LIMIT=y
+CONFIG_NETFILTER_XT_MATCH_MAC=y
+CONFIG_NETFILTER_XT_MATCH_MARK=y
+CONFIG_NETFILTER_XT_MATCH_POLICY=y
+CONFIG_NETFILTER_XT_MATCH_PKTTYPE=y
+CONFIG_NETFILTER_XT_MATCH_QTAGUID=y
+CONFIG_NETFILTER_XT_MATCH_QUOTA=y
+CONFIG_NETFILTER_XT_MATCH_QUOTA2=y
+CONFIG_NETFILTER_XT_MATCH_SOCKET=y
+CONFIG_NETFILTER_XT_MATCH_STATE=y
+CONFIG_NETFILTER_XT_MATCH_STATISTIC=y
+CONFIG_NETFILTER_XT_MATCH_STRING=y
+CONFIG_NETFILTER_XT_MATCH_TIME=y
+CONFIG_NETFILTER_XT_MATCH_U32=y
+CONFIG_NF_CONNTRACK_IPV4=y
+CONFIG_IP_NF_IPTABLES=y
+CONFIG_IP_NF_MATCH_AH=y
+CONFIG_IP_NF_MATCH_ECN=y
+CONFIG_IP_NF_MATCH_TTL=y
+CONFIG_IP_NF_FILTER=y
+CONFIG_IP_NF_TARGET_REJECT=y
+CONFIG_IP_NF_MANGLE=y
+CONFIG_IP_NF_RAW=y
+CONFIG_IP_NF_SECURITY=y
+CONFIG_IP_NF_ARPTABLES=y
+CONFIG_IP_NF_ARPFILTER=y
+CONFIG_IP_NF_ARP_MANGLE=y
+CONFIG_NF_CONNTRACK_IPV6=y
+CONFIG_IP6_NF_IPTABLES=y
+CONFIG_IP6_NF_FILTER=y
+CONFIG_IP6_NF_TARGET_REJECT=y
+CONFIG_IP6_NF_MANGLE=y
+CONFIG_IP6_NF_RAW=y
+CONFIG_NET_SCHED=y
+CONFIG_NET_SCH_HTB=y
+CONFIG_NET_CLS_U32=y
+CONFIG_NET_EMATCH=y
+CONFIG_NET_EMATCH_U32=y
+CONFIG_NET_CLS_ACT=y
+CONFIG_CFG80211=y
+CONFIG_MAC80211=y
+CONFIG_MAC80211_LEDS=y
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_DMA_CMA=y
+CONFIG_CONNECTOR=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_SIZE=8192
+CONFIG_VIRTIO_BLK=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_BLK_DEV_SR=y
+CONFIG_BLK_DEV_SR_VENDOR=y
+CONFIG_CHR_DEV_SG=y
+CONFIG_SCSI_CONSTANTS=y
+CONFIG_SCSI_SPI_ATTRS=y
+CONFIG_SCSI_ISCSI_ATTRS=y
+# CONFIG_SCSI_LOWLEVEL is not set
+CONFIG_ATA=y
+CONFIG_SATA_AHCI=y
+CONFIG_ATA_PIIX=y
+CONFIG_PATA_AMD=y
+CONFIG_PATA_OLDPIIX=y
+CONFIG_PATA_SCH=y
+CONFIG_PATA_MPIIX=y
+CONFIG_ATA_GENERIC=y
+CONFIG_MD=y
+CONFIG_BLK_DEV_MD=y
+CONFIG_BLK_DEV_DM=y
+CONFIG_DM_DEBUG=y
+CONFIG_DM_CRYPT=y
+CONFIG_DM_MIRROR=y
+CONFIG_DM_ZERO=y
+CONFIG_DM_UEVENT=y
+CONFIG_DM_VERITY=y
+CONFIG_DM_VERITY_FEC=y
+CONFIG_NETDEVICES=y
+CONFIG_NETCONSOLE=y
+CONFIG_TUN=y
+CONFIG_VIRTIO_NET=y
+CONFIG_BNX2=y
+CONFIG_TIGON3=y
+CONFIG_NET_TULIP=y
+CONFIG_E100=y
+CONFIG_E1000=y
+CONFIG_E1000E=y
+CONFIG_SKY2=y
+CONFIG_NE2K_PCI=y
+CONFIG_FORCEDETH=y
+CONFIG_8139TOO=y
+# CONFIG_8139TOO_PIO is not set
+CONFIG_R8169=y
+CONFIG_FDDI=y
+CONFIG_PPP=y
+CONFIG_PPP_BSDCOMP=y
+CONFIG_PPP_DEFLATE=y
+CONFIG_PPP_MPPE=y
+CONFIG_PPPOLAC=y
+CONFIG_PPPOPNS=y
+CONFIG_USB_USBNET=y
+CONFIG_INPUT_POLLDEV=y
+# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
+CONFIG_INPUT_EVDEV=y
+CONFIG_INPUT_KEYRESET=y
+# CONFIG_KEYBOARD_ATKBD is not set
+CONFIG_KEYBOARD_GOLDFISH_EVENTS=y
+# CONFIG_INPUT_MOUSE is not set
+CONFIG_INPUT_JOYSTICK=y
+CONFIG_JOYSTICK_XPAD=y
+CONFIG_JOYSTICK_XPAD_FF=y
+CONFIG_JOYSTICK_XPAD_LEDS=y
+CONFIG_INPUT_TABLET=y
+CONFIG_TABLET_USB_ACECAD=y
+CONFIG_TABLET_USB_AIPTEK=y
+CONFIG_TABLET_USB_GTCO=y
+CONFIG_TABLET_USB_HANWANG=y
+CONFIG_TABLET_USB_KBTAB=y
+CONFIG_INPUT_TOUCHSCREEN=y
+CONFIG_INPUT_MISC=y
+CONFIG_INPUT_KEYCHORD=y
+CONFIG_INPUT_UINPUT=y
+CONFIG_INPUT_GPIO=y
+# CONFIG_SERIO is not set
+# CONFIG_VT is not set
+# CONFIG_LEGACY_PTYS is not set
+CONFIG_SERIAL_NONSTANDARD=y
+# CONFIG_DEVMEM is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_NVRAM=y
+CONFIG_I2C_I801=y
+CONFIG_BATTERY_GOLDFISH=y
+CONFIG_WATCHDOG=y
+CONFIG_MEDIA_SUPPORT=y
+CONFIG_AGP=y
+CONFIG_AGP_AMD64=y
+CONFIG_AGP_INTEL=y
+CONFIG_DRM=y
+CONFIG_FB_MODE_HELPERS=y
+CONFIG_FB_TILEBLITTING=y
+CONFIG_FB_EFI=y
+CONFIG_FB_GOLDFISH=y
+CONFIG_BACKLIGHT_LCD_SUPPORT=y
+# CONFIG_LCD_CLASS_DEVICE is not set
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_HIDRAW=y
+CONFIG_UHID=y
+CONFIG_HID_A4TECH=y
+CONFIG_HID_ACRUX=y
+CONFIG_HID_ACRUX_FF=y
+CONFIG_HID_APPLE=y
+CONFIG_HID_BELKIN=y
+CONFIG_HID_CHERRY=y
+CONFIG_HID_CHICONY=y
+CONFIG_HID_PRODIKEYS=y
+CONFIG_HID_CYPRESS=y
+CONFIG_HID_DRAGONRISE=y
+CONFIG_DRAGONRISE_FF=y
+CONFIG_HID_EMS_FF=y
+CONFIG_HID_ELECOM=y
+CONFIG_HID_EZKEY=y
+CONFIG_HID_HOLTEK=y
+CONFIG_HID_KEYTOUCH=y
+CONFIG_HID_KYE=y
+CONFIG_HID_UCLOGIC=y
+CONFIG_HID_WALTOP=y
+CONFIG_HID_GYRATION=y
+CONFIG_HID_TWINHAN=y
+CONFIG_HID_KENSINGTON=y
+CONFIG_HID_LCPOWER=y
+CONFIG_HID_LOGITECH=y
+CONFIG_HID_LOGITECH_DJ=y
+CONFIG_LOGITECH_FF=y
+CONFIG_LOGIRUMBLEPAD2_FF=y
+CONFIG_LOGIG940_FF=y
+CONFIG_HID_MAGICMOUSE=y
+CONFIG_HID_MICROSOFT=y
+CONFIG_HID_MONTEREY=y
+CONFIG_HID_MULTITOUCH=y
+CONFIG_HID_NTRIG=y
+CONFIG_HID_ORTEK=y
+CONFIG_HID_PANTHERLORD=y
+CONFIG_PANTHERLORD_FF=y
+CONFIG_HID_PETALYNX=y
+CONFIG_HID_PICOLCD=y
+CONFIG_HID_PRIMAX=y
+CONFIG_HID_ROCCAT=y
+CONFIG_HID_SAITEK=y
+CONFIG_HID_SAMSUNG=y
+CONFIG_HID_SONY=y
+CONFIG_HID_SPEEDLINK=y
+CONFIG_HID_SUNPLUS=y
+CONFIG_HID_GREENASIA=y
+CONFIG_GREENASIA_FF=y
+CONFIG_HID_SMARTJOYPLUS=y
+CONFIG_SMARTJOYPLUS_FF=y
+CONFIG_HID_TIVO=y
+CONFIG_HID_TOPSEED=y
+CONFIG_HID_THRUSTMASTER=y
+CONFIG_HID_WACOM=y
+CONFIG_HID_WIIMOTE=y
+CONFIG_HID_ZEROPLUS=y
+CONFIG_HID_ZYDACRON=y
+CONFIG_HID_PID=y
+CONFIG_USB_HIDDEV=y
+CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
+CONFIG_USB_MON=y
+CONFIG_USB_EHCI_HCD=y
+# CONFIG_USB_EHCI_TT_NEWSCHED is not set
+CONFIG_USB_OHCI_HCD=y
+CONFIG_USB_UHCI_HCD=y
+CONFIG_USB_PRINTER=y
+CONFIG_USB_STORAGE=y
+CONFIG_USB_OTG_WAKELOCK=y
+CONFIG_EDAC=y
+CONFIG_RTC_CLASS=y
+# CONFIG_RTC_HCTOSYS is not set
+CONFIG_DMADEVICES=y
+CONFIG_VIRTIO_PCI=y
+CONFIG_STAGING=y
+CONFIG_ASHMEM=y
+CONFIG_ANDROID_LOW_MEMORY_KILLER=y
+CONFIG_SYNC=y
+CONFIG_SW_SYNC=y
+CONFIG_ION=y
+CONFIG_GOLDFISH_AUDIO=y
+CONFIG_GOLDFISH_SYNC=y
+CONFIG_SND_HDA_INTEL=y
+CONFIG_GOLDFISH=y
+CONFIG_GOLDFISH_PIPE=y
+CONFIG_ANDROID=y
+CONFIG_ANDROID_BINDER_IPC=y
+CONFIG_ISCSI_IBFT_FIND=y
+CONFIG_EXT4_FS=y
+CONFIG_EXT4_FS_SECURITY=y
+CONFIG_QUOTA=y
+CONFIG_QUOTA_NETLINK_INTERFACE=y
+# CONFIG_PRINT_QUOTA_WARNING is not set
+CONFIG_FUSE_FS=y
+CONFIG_ISO9660_FS=y
+CONFIG_JOLIET=y
+CONFIG_ZISOFS=y
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=y
+CONFIG_PROC_KCORE=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_HUGETLBFS=y
+CONFIG_PSTORE=y
+CONFIG_PSTORE_CONSOLE=y
+CONFIG_PSTORE_RAM=y
+# CONFIG_NETWORK_FILESYSTEMS is not set
+CONFIG_NLS_DEFAULT="utf8"
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ASCII=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_NLS_UTF8=y
+CONFIG_PRINTK_TIME=y
+CONFIG_DEBUG_INFO=y
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+# CONFIG_UNUSED_SYMBOLS is not set
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_DEBUG_MEMORY_INIT=y
+CONFIG_PANIC_TIMEOUT=5
+CONFIG_SCHEDSTATS=y
+CONFIG_TIMER_STATS=y
+CONFIG_SCHED_TRACER=y
+CONFIG_BLK_DEV_IO_TRACE=y
+CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
+CONFIG_KEYS=y
+CONFIG_SECURITY=y
+CONFIG_SECURITY_NETWORK=y
+CONFIG_SECURITY_SELINUX=y
+CONFIG_CRYPTO_TWOFISH=y
+CONFIG_ASYMMETRIC_KEY_TYPE=y
+CONFIG_ASYMMETRIC_PUBLIC_KEY_SUBTYPE=y
+CONFIG_X509_CERTIFICATE_PARSER=y
+CONFIG_PKCS7_MESSAGE_PARSER=y
+CONFIG_PKCS7_TEST_KEY=y
+# CONFIG_VIRTUALIZATION is not set
+CONFIG_CRC_T10DIF=y
diff --git a/arch/x86/include/asm/idle.h b/arch/x86/include/asm/idle.h
index c5d1785373ed..02bab09707f2 100644
--- a/arch/x86/include/asm/idle.h
+++ b/arch/x86/include/asm/idle.h
@@ -1,13 +1,6 @@
#ifndef _ASM_X86_IDLE_H
#define _ASM_X86_IDLE_H
-#define IDLE_START 1
-#define IDLE_END 2
-
-struct notifier_block;
-void idle_notifier_register(struct notifier_block *n);
-void idle_notifier_unregister(struct notifier_block *n);
-
#ifdef CONFIG_X86_64
void enter_idle(void);
void exit_idle(void);
diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index f0bb7c1f7d19..7402eb4b509d 100644
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -706,7 +706,7 @@ __copy_from_user_overflow(int size, unsigned long count)
#endif
-static inline unsigned long __must_check
+static __always_inline unsigned long __must_check
copy_from_user(void *to, const void __user *from, unsigned long n)
{
int sz = __compiletime_object_size(to);
@@ -742,7 +742,7 @@ copy_from_user(void *to, const void __user *from, unsigned long n)
return n;
}
-static inline unsigned long __must_check
+static __always_inline unsigned long __must_check
copy_to_user(void __user *to, const void *from, unsigned long n)
{
int sz = __compiletime_object_size(from);
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 9f7c21c22477..57eca132962f 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -62,19 +62,6 @@ EXPORT_PER_CPU_SYMBOL(cpu_tss);
#ifdef CONFIG_X86_64
static DEFINE_PER_CPU(unsigned char, is_idle);
-static ATOMIC_NOTIFIER_HEAD(idle_notifier);
-
-void idle_notifier_register(struct notifier_block *n)
-{
- atomic_notifier_chain_register(&idle_notifier, n);
-}
-EXPORT_SYMBOL_GPL(idle_notifier_register);
-
-void idle_notifier_unregister(struct notifier_block *n)
-{
- atomic_notifier_chain_unregister(&idle_notifier, n);
-}
-EXPORT_SYMBOL_GPL(idle_notifier_unregister);
#endif
/*
@@ -251,14 +238,14 @@ static inline void play_dead(void)
void enter_idle(void)
{
this_cpu_write(is_idle, 1);
- atomic_notifier_call_chain(&idle_notifier, IDLE_START, NULL);
+ idle_notifier_call_chain(IDLE_START);
}
static void __exit_idle(void)
{
if (x86_test_and_clear_bit_percpu(0, is_idle) == 0)
return;
- atomic_notifier_call_chain(&idle_notifier, IDLE_END, NULL);
+ idle_notifier_call_chain(IDLE_END);
}
/* Called from interrupts to signify idle end */
diff --git a/arch/x86/mm/mmap.c b/arch/x86/mm/mmap.c
index 307f60ecfc6d..d2dc0438d654 100644
--- a/arch/x86/mm/mmap.c
+++ b/arch/x86/mm/mmap.c
@@ -69,14 +69,14 @@ unsigned long arch_mmap_rnd(void)
{
unsigned long rnd;
- /*
- * 8 bits of randomness in 32bit mmaps, 20 address space bits
- * 28 bits of randomness in 64bit mmaps, 40 address space bits
- */
if (mmap_is_ia32())
- rnd = (unsigned long)get_random_int() % (1<<8);
+#ifdef CONFIG_COMPAT
+ rnd = get_random_long() & ((1UL << mmap_rnd_compat_bits) - 1);
+#else
+ rnd = get_random_long() & ((1UL << mmap_rnd_bits) - 1);
+#endif
else
- rnd = (unsigned long)get_random_int() % (1<<28);
+ rnd = get_random_long() & ((1UL << mmap_rnd_bits) - 1);
return rnd << PAGE_SHIFT;
}
diff --git a/block/blk-core.c b/block/blk-core.c
index 4fab5d610805..25f25271b42a 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -40,6 +40,8 @@
#include "blk.h"
#include "blk-mq.h"
+#include <linux/math64.h>
+
EXPORT_TRACEPOINT_SYMBOL_GPL(block_bio_remap);
EXPORT_TRACEPOINT_SYMBOL_GPL(block_rq_remap);
EXPORT_TRACEPOINT_SYMBOL_GPL(block_bio_complete);
@@ -3541,3 +3543,85 @@ int __init blk_dev_init(void)
return 0;
}
+
+/*
+ * Blk IO latency support. We want this to be as cheap as possible, so doing
+ * this lockless (and avoiding atomics), a few off by a few errors in this
+ * code is not harmful, and we don't want to do anything that is
+ * perf-impactful.
+ * TODO : If necessary, we can make the histograms per-cpu and aggregate
+ * them when printing them out.
+ */
+void
+blk_zero_latency_hist(struct io_latency_state *s)
+{
+ memset(s->latency_y_axis_read, 0,
+ sizeof(s->latency_y_axis_read));
+ memset(s->latency_y_axis_write, 0,
+ sizeof(s->latency_y_axis_write));
+ s->latency_reads_elems = 0;
+ s->latency_writes_elems = 0;
+}
+EXPORT_SYMBOL(blk_zero_latency_hist);
+
+ssize_t
+blk_latency_hist_show(struct io_latency_state *s, char *buf)
+{
+ int i;
+ int bytes_written = 0;
+ u_int64_t num_elem, elem;
+ int pct;
+
+ num_elem = s->latency_reads_elems;
+ if (num_elem > 0) {
+ bytes_written += scnprintf(buf + bytes_written,
+ PAGE_SIZE - bytes_written,
+ "IO svc_time Read Latency Histogram (n = %llu):\n",
+ num_elem);
+ for (i = 0;
+ i < ARRAY_SIZE(latency_x_axis_us);
+ i++) {
+ elem = s->latency_y_axis_read[i];
+ pct = div64_u64(elem * 100, num_elem);
+ bytes_written += scnprintf(buf + bytes_written,
+ PAGE_SIZE - bytes_written,
+ "\t< %5lluus%15llu%15d%%\n",
+ latency_x_axis_us[i],
+ elem, pct);
+ }
+ /* Last element in y-axis table is overflow */
+ elem = s->latency_y_axis_read[i];
+ pct = div64_u64(elem * 100, num_elem);
+ bytes_written += scnprintf(buf + bytes_written,
+ PAGE_SIZE - bytes_written,
+ "\t> %5dms%15llu%15d%%\n", 10,
+ elem, pct);
+ }
+ num_elem = s->latency_writes_elems;
+ if (num_elem > 0) {
+ bytes_written += scnprintf(buf + bytes_written,
+ PAGE_SIZE - bytes_written,
+ "IO svc_time Write Latency Histogram (n = %llu):\n",
+ num_elem);
+ for (i = 0;
+ i < ARRAY_SIZE(latency_x_axis_us);
+ i++) {
+ elem = s->latency_y_axis_write[i];
+ pct = div64_u64(elem * 100, num_elem);
+ bytes_written += scnprintf(buf + bytes_written,
+ PAGE_SIZE - bytes_written,
+ "\t< %5lluus%15llu%15d%%\n",
+ latency_x_axis_us[i],
+ elem, pct);
+ }
+ /* Last element in y-axis table is overflow */
+ elem = s->latency_y_axis_write[i];
+ pct = div64_u64(elem * 100, num_elem);
+ bytes_written += scnprintf(buf + bytes_written,
+ PAGE_SIZE - bytes_written,
+ "\t> %5dms%15llu%15d%%\n", 10,
+ elem, pct);
+ }
+ return bytes_written;
+}
+EXPORT_SYMBOL(blk_latency_hist_show);
diff --git a/block/genhd.c b/block/genhd.c
index a5bed6bc869d..fad9db981675 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1118,6 +1118,22 @@ static void disk_release(struct device *dev)
blk_put_queue(disk->queue);
kfree(disk);
}
+
+static int disk_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct gendisk *disk = dev_to_disk(dev);
+ struct disk_part_iter piter;
+ struct hd_struct *part;
+ int cnt = 0;
+
+ disk_part_iter_init(&piter, disk, 0);
+ while((part = disk_part_iter_next(&piter)))
+ cnt++;
+ disk_part_iter_exit(&piter);
+ add_uevent_var(env, "NPARTS=%u", cnt);
+ return 0;
+}
+
struct class block_class = {
.name = "block",
};
@@ -1137,6 +1153,7 @@ static struct device_type disk_type = {
.groups = disk_attr_groups,
.release = disk_release,
.devnode = block_devnode,
+ .uevent = disk_uevent,
};
#ifdef CONFIG_PROC_FS
diff --git a/block/partition-generic.c b/block/partition-generic.c
index a241e3900bc9..91327dbfbb1d 100644
--- a/block/partition-generic.c
+++ b/block/partition-generic.c
@@ -216,10 +216,21 @@ static void part_release(struct device *dev)
kfree(p);
}
+static int part_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct hd_struct *part = dev_to_part(dev);
+
+ add_uevent_var(env, "PARTN=%u", part->partno);
+ if (part->info && part->info->volname[0])
+ add_uevent_var(env, "PARTNAME=%s", part->info->volname);
+ return 0;
+}
+
struct device_type part_type = {
.name = "partition",
.groups = part_attr_groups,
.release = part_release,
+ .uevent = part_uevent,
};
static void delete_partition_rcu_cb(struct rcu_head *head)
diff --git a/drivers/android/Kconfig b/drivers/android/Kconfig
index bdfc6c6f4f5a..a82fc022d34b 100644
--- a/drivers/android/Kconfig
+++ b/drivers/android/Kconfig
@@ -19,6 +19,18 @@ config ANDROID_BINDER_IPC
Android process, using Binder to identify, invoke and pass arguments
between said processes.
+config ANDROID_BINDER_DEVICES
+ string "Android Binder devices"
+ depends on ANDROID_BINDER_IPC
+ default "binder"
+ ---help---
+ Default value for the binder.devices parameter.
+
+ The binder.devices parameter is a comma-separated list of strings
+ that specifies the names of the binder device nodes that will be
+ created. Each binder device has its own context manager, and is
+ therefore logically separated from the other devices.
+
config ANDROID_BINDER_IPC_32BIT
bool
depends on !64BIT && ANDROID_BINDER_IPC
diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 47ddfefe2443..6c24673990bb 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -50,14 +50,13 @@ static DEFINE_MUTEX(binder_main_lock);
static DEFINE_MUTEX(binder_deferred_lock);
static DEFINE_MUTEX(binder_mmap_lock);
+static HLIST_HEAD(binder_devices);
static HLIST_HEAD(binder_procs);
static HLIST_HEAD(binder_deferred_list);
static HLIST_HEAD(binder_dead_nodes);
static struct dentry *binder_debugfs_dir_entry_root;
static struct dentry *binder_debugfs_dir_entry_proc;
-static struct binder_node *binder_context_mgr_node;
-static kuid_t binder_context_mgr_uid = INVALID_UID;
static int binder_last_id;
static struct workqueue_struct *binder_deferred_workqueue;
@@ -116,6 +115,9 @@ module_param_named(debug_mask, binder_debug_mask, uint, S_IWUSR | S_IRUGO);
static bool binder_debug_no_lock;
module_param_named(proc_no_lock, binder_debug_no_lock, bool, S_IWUSR | S_IRUGO);
+static char *binder_devices_param = CONFIG_ANDROID_BINDER_DEVICES;
+module_param_named(devices, binder_devices_param, charp, S_IRUGO);
+
static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait);
static int binder_stop_on_user_error;
@@ -146,6 +148,17 @@ module_param_call(stop_on_user_error, binder_set_stop_on_user_error,
binder_stop_on_user_error = 2; \
} while (0)
+#define to_flat_binder_object(hdr) \
+ container_of(hdr, struct flat_binder_object, hdr)
+
+#define to_binder_fd_object(hdr) container_of(hdr, struct binder_fd_object, hdr)
+
+#define to_binder_buffer_object(hdr) \
+ container_of(hdr, struct binder_buffer_object, hdr)
+
+#define to_binder_fd_array_object(hdr) \
+ container_of(hdr, struct binder_fd_array_object, hdr)
+
enum binder_stat_types {
BINDER_STAT_PROC,
BINDER_STAT_THREAD,
@@ -159,7 +172,7 @@ enum binder_stat_types {
struct binder_stats {
int br[_IOC_NR(BR_FAILED_REPLY) + 1];
- int bc[_IOC_NR(BC_DEAD_BINDER_DONE) + 1];
+ int bc[_IOC_NR(BC_REPLY_SG) + 1];
int obj_created[BINDER_STAT_COUNT];
int obj_deleted[BINDER_STAT_COUNT];
};
@@ -187,6 +200,7 @@ struct binder_transaction_log_entry {
int to_node;
int data_size;
int offsets_size;
+ const char *context_name;
};
struct binder_transaction_log {
int next;
@@ -211,6 +225,18 @@ static struct binder_transaction_log_entry *binder_transaction_log_add(
return e;
}
+struct binder_context {
+ struct binder_node *binder_context_mgr_node;
+ kuid_t binder_context_mgr_uid;
+ const char *name;
+};
+
+struct binder_device {
+ struct hlist_node hlist;
+ struct miscdevice miscdev;
+ struct binder_context context;
+};
+
struct binder_work {
struct list_head entry;
enum {
@@ -283,6 +309,7 @@ struct binder_buffer {
struct binder_node *target_node;
size_t data_size;
size_t offsets_size;
+ size_t extra_buffers_size;
uint8_t data[0];
};
@@ -326,6 +353,7 @@ struct binder_proc {
int ready_threads;
long default_priority;
struct dentry *debugfs_entry;
+ struct binder_context *context;
};
enum {
@@ -649,7 +677,9 @@ err_no_vma:
static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc,
size_t data_size,
- size_t offsets_size, int is_async)
+ size_t offsets_size,
+ size_t extra_buffers_size,
+ int is_async)
{
struct rb_node *n = proc->free_buffers.rb_node;
struct binder_buffer *buffer;
@@ -657,7 +687,7 @@ static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc,
struct rb_node *best_fit = NULL;
void *has_page_addr;
void *end_page_addr;
- size_t size;
+ size_t size, data_offsets_size;
if (proc->vma == NULL) {
pr_err("%d: binder_alloc_buf, no vma\n",
@@ -665,15 +695,20 @@ static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc,
return NULL;
}
- size = ALIGN(data_size, sizeof(void *)) +
+ data_offsets_size = ALIGN(data_size, sizeof(void *)) +
ALIGN(offsets_size, sizeof(void *));
- if (size < data_size || size < offsets_size) {
+ if (data_offsets_size < data_size || data_offsets_size < offsets_size) {
binder_user_error("%d: got transaction with invalid size %zd-%zd\n",
proc->pid, data_size, offsets_size);
return NULL;
}
-
+ size = data_offsets_size + ALIGN(extra_buffers_size, sizeof(void *));
+ if (size < data_offsets_size || size < extra_buffers_size) {
+ binder_user_error("%d: got transaction with invalid extra_buffers_size %zd\n",
+ proc->pid, extra_buffers_size);
+ return NULL;
+ }
if (is_async &&
proc->free_async_space < size + sizeof(struct binder_buffer)) {
binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
@@ -742,6 +777,7 @@ static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc,
proc->pid, size, buffer);
buffer->data_size = data_size;
buffer->offsets_size = offsets_size;
+ buffer->extra_buffers_size = extra_buffers_size;
buffer->async_transaction = is_async;
if (is_async) {
proc->free_async_space -= size + sizeof(struct binder_buffer);
@@ -816,7 +852,8 @@ static void binder_free_buf(struct binder_proc *proc,
buffer_size = binder_buffer_size(proc, buffer);
size = ALIGN(buffer->data_size, sizeof(void *)) +
- ALIGN(buffer->offsets_size, sizeof(void *));
+ ALIGN(buffer->offsets_size, sizeof(void *)) +
+ ALIGN(buffer->extra_buffers_size, sizeof(void *));
binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
"%d: binder_free_buf %p size %zd buffer_size %zd\n",
@@ -930,8 +967,10 @@ static int binder_inc_node(struct binder_node *node, int strong, int internal,
if (internal) {
if (target_list == NULL &&
node->internal_strong_refs == 0 &&
- !(node == binder_context_mgr_node &&
- node->has_strong_ref)) {
+ !(node->proc &&
+ node == node->proc->context->
+ binder_context_mgr_node &&
+ node->has_strong_ref)) {
pr_err("invalid inc strong node for %d\n",
node->debug_id);
return -EINVAL;
@@ -1032,6 +1071,7 @@ static struct binder_ref *binder_get_ref_for_node(struct binder_proc *proc,
struct rb_node **p = &proc->refs_by_node.rb_node;
struct rb_node *parent = NULL;
struct binder_ref *ref, *new_ref;
+ struct binder_context *context = proc->context;
while (*p) {
parent = *p;
@@ -1054,7 +1094,7 @@ static struct binder_ref *binder_get_ref_for_node(struct binder_proc *proc,
rb_link_node(&new_ref->rb_node_node, parent, p);
rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node);
- new_ref->desc = (node == binder_context_mgr_node) ? 0 : 1;
+ new_ref->desc = (node == context->binder_context_mgr_node) ? 0 : 1;
for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
ref = rb_entry(n, struct binder_ref, rb_node_desc);
if (ref->desc > new_ref->desc)
@@ -1241,11 +1281,158 @@ static void binder_send_failed_reply(struct binder_transaction *t,
}
}
+/**
+ * binder_validate_object() - checks for a valid metadata object in a buffer.
+ * @buffer: binder_buffer that we're parsing.
+ * @offset: offset in the buffer at which to validate an object.
+ *
+ * Return: If there's a valid metadata object at @offset in @buffer, the
+ * size of that object. Otherwise, it returns zero.
+ */
+static size_t binder_validate_object(struct binder_buffer *buffer, u64 offset)
+{
+ /* Check if we can read a header first */
+ struct binder_object_header *hdr;
+ size_t object_size = 0;
+
+ if (offset > buffer->data_size - sizeof(*hdr) ||
+ buffer->data_size < sizeof(*hdr) ||
+ !IS_ALIGNED(offset, sizeof(u32)))
+ return 0;
+
+ /* Ok, now see if we can read a complete object. */
+ hdr = (struct binder_object_header *)(buffer->data + offset);
+ switch (hdr->type) {
+ case BINDER_TYPE_BINDER:
+ case BINDER_TYPE_WEAK_BINDER:
+ case BINDER_TYPE_HANDLE:
+ case BINDER_TYPE_WEAK_HANDLE:
+ object_size = sizeof(struct flat_binder_object);
+ break;
+ case BINDER_TYPE_FD:
+ object_size = sizeof(struct binder_fd_object);
+ break;
+ case BINDER_TYPE_PTR:
+ object_size = sizeof(struct binder_buffer_object);
+ break;
+ case BINDER_TYPE_FDA:
+ object_size = sizeof(struct binder_fd_array_object);
+ break;
+ default:
+ return 0;
+ }
+ if (offset <= buffer->data_size - object_size &&
+ buffer->data_size >= object_size)
+ return object_size;
+ else
+ return 0;
+}
+
+/**
+ * binder_validate_ptr() - validates binder_buffer_object in a binder_buffer.
+ * @b: binder_buffer containing the object
+ * @index: index in offset array at which the binder_buffer_object is
+ * located
+ * @start: points to the start of the offset array
+ * @num_valid: the number of valid offsets in the offset array
+ *
+ * Return: If @index is within the valid range of the offset array
+ * described by @start and @num_valid, and if there's a valid
+ * binder_buffer_object at the offset found in index @index
+ * of the offset array, that object is returned. Otherwise,
+ * %NULL is returned.
+ * Note that the offset found in index @index itself is not
+ * verified; this function assumes that @num_valid elements
+ * from @start were previously verified to have valid offsets.
+ */
+static struct binder_buffer_object *binder_validate_ptr(struct binder_buffer *b,
+ binder_size_t index,
+ binder_size_t *start,
+ binder_size_t num_valid)
+{
+ struct binder_buffer_object *buffer_obj;
+ binder_size_t *offp;
+
+ if (index >= num_valid)
+ return NULL;
+
+ offp = start + index;
+ buffer_obj = (struct binder_buffer_object *)(b->data + *offp);
+ if (buffer_obj->hdr.type != BINDER_TYPE_PTR)
+ return NULL;
+
+ return buffer_obj;
+}
+
+/**
+ * binder_validate_fixup() - validates pointer/fd fixups happen in order.
+ * @b: transaction buffer
+ * @objects_start start of objects buffer
+ * @buffer: binder_buffer_object in which to fix up
+ * @offset: start offset in @buffer to fix up
+ * @last_obj: last binder_buffer_object that we fixed up in
+ * @last_min_offset: minimum fixup offset in @last_obj
+ *
+ * Return: %true if a fixup in buffer @buffer at offset @offset is
+ * allowed.
+ *
+ * For safety reasons, we only allow fixups inside a buffer to happen
+ * at increasing offsets; additionally, we only allow fixup on the last
+ * buffer object that was verified, or one of its parents.
+ *
+ * Example of what is allowed:
+ *
+ * A
+ * B (parent = A, offset = 0)
+ * C (parent = A, offset = 16)
+ * D (parent = C, offset = 0)
+ * E (parent = A, offset = 32) // min_offset is 16 (C.parent_offset)
+ *
+ * Examples of what is not allowed:
+ *
+ * Decreasing offsets within the same parent:
+ * A
+ * C (parent = A, offset = 16)
+ * B (parent = A, offset = 0) // decreasing offset within A
+ *
+ * Referring to a parent that wasn't the last object or any of its parents:
+ * A
+ * B (parent = A, offset = 0)
+ * C (parent = A, offset = 0)
+ * C (parent = A, offset = 16)
+ * D (parent = B, offset = 0) // B is not A or any of A's parents
+ */
+static bool binder_validate_fixup(struct binder_buffer *b,
+ binder_size_t *objects_start,
+ struct binder_buffer_object *buffer,
+ binder_size_t fixup_offset,
+ struct binder_buffer_object *last_obj,
+ binder_size_t last_min_offset)
+{
+ if (!last_obj) {
+ /* Nothing to fix up in */
+ return false;
+ }
+
+ while (last_obj != buffer) {
+ /*
+ * Safe to retrieve the parent of last_obj, since it
+ * was already previously verified by the driver.
+ */
+ if ((last_obj->flags & BINDER_BUFFER_FLAG_HAS_PARENT) == 0)
+ return false;
+ last_min_offset = last_obj->parent_offset + sizeof(uintptr_t);
+ last_obj = (struct binder_buffer_object *)
+ (b->data + *(objects_start + last_obj->parent));
+ }
+ return (fixup_offset >= last_min_offset);
+}
+
static void binder_transaction_buffer_release(struct binder_proc *proc,
struct binder_buffer *buffer,
binder_size_t *failed_at)
{
- binder_size_t *offp, *off_end;
+ binder_size_t *offp, *off_start, *off_end;
int debug_id = buffer->debug_id;
binder_debug(BINDER_DEBUG_TRANSACTION,
@@ -1256,28 +1443,30 @@ static void binder_transaction_buffer_release(struct binder_proc *proc,
if (buffer->target_node)
binder_dec_node(buffer->target_node, 1, 0);
- offp = (binder_size_t *)(buffer->data +
- ALIGN(buffer->data_size, sizeof(void *)));
+ off_start = (binder_size_t *)(buffer->data +
+ ALIGN(buffer->data_size, sizeof(void *)));
if (failed_at)
off_end = failed_at;
else
- off_end = (void *)offp + buffer->offsets_size;
- for (; offp < off_end; offp++) {
- struct flat_binder_object *fp;
+ off_end = (void *)off_start + buffer->offsets_size;
+ for (offp = off_start; offp < off_end; offp++) {
+ struct binder_object_header *hdr;
+ size_t object_size = binder_validate_object(buffer, *offp);
- if (*offp > buffer->data_size - sizeof(*fp) ||
- buffer->data_size < sizeof(*fp) ||
- !IS_ALIGNED(*offp, sizeof(u32))) {
- pr_err("transaction release %d bad offset %lld, size %zd\n",
+ if (object_size == 0) {
+ pr_err("transaction release %d bad object at offset %lld, size %zd\n",
debug_id, (u64)*offp, buffer->data_size);
continue;
}
- fp = (struct flat_binder_object *)(buffer->data + *offp);
- switch (fp->type) {
+ hdr = (struct binder_object_header *)(buffer->data + *offp);
+ switch (hdr->type) {
case BINDER_TYPE_BINDER:
case BINDER_TYPE_WEAK_BINDER: {
- struct binder_node *node = binder_get_node(proc, fp->binder);
+ struct flat_binder_object *fp;
+ struct binder_node *node;
+ fp = to_flat_binder_object(hdr);
+ node = binder_get_node(proc, fp->binder);
if (node == NULL) {
pr_err("transaction release %d bad node %016llx\n",
debug_id, (u64)fp->binder);
@@ -1286,14 +1475,17 @@ static void binder_transaction_buffer_release(struct binder_proc *proc,
binder_debug(BINDER_DEBUG_TRANSACTION,
" node %d u%016llx\n",
node->debug_id, (u64)node->ptr);
- binder_dec_node(node, fp->type == BINDER_TYPE_BINDER, 0);
+ binder_dec_node(node, hdr->type == BINDER_TYPE_BINDER,
+ 0);
} break;
case BINDER_TYPE_HANDLE:
case BINDER_TYPE_WEAK_HANDLE: {
+ struct flat_binder_object *fp;
struct binder_ref *ref;
+ fp = to_flat_binder_object(hdr);
ref = binder_get_ref(proc, fp->handle,
- fp->type == BINDER_TYPE_HANDLE);
+ hdr->type == BINDER_TYPE_HANDLE);
if (ref == NULL) {
pr_err("transaction release %d bad handle %d\n",
@@ -1303,31 +1495,348 @@ static void binder_transaction_buffer_release(struct binder_proc *proc,
binder_debug(BINDER_DEBUG_TRANSACTION,
" ref %d desc %d (node %d)\n",
ref->debug_id, ref->desc, ref->node->debug_id);
- binder_dec_ref(ref, fp->type == BINDER_TYPE_HANDLE);
+ binder_dec_ref(ref, hdr->type == BINDER_TYPE_HANDLE);
} break;
- case BINDER_TYPE_FD:
+ case BINDER_TYPE_FD: {
+ struct binder_fd_object *fp = to_binder_fd_object(hdr);
+
binder_debug(BINDER_DEBUG_TRANSACTION,
- " fd %d\n", fp->handle);
+ " fd %d\n", fp->fd);
if (failed_at)
- task_close_fd(proc, fp->handle);
+ task_close_fd(proc, fp->fd);
+ } break;
+ case BINDER_TYPE_PTR:
+ /*
+ * Nothing to do here, this will get cleaned up when the
+ * transaction buffer gets freed
+ */
break;
-
+ case BINDER_TYPE_FDA: {
+ struct binder_fd_array_object *fda;
+ struct binder_buffer_object *parent;
+ uintptr_t parent_buffer;
+ u32 *fd_array;
+ size_t fd_index;
+ binder_size_t fd_buf_size;
+
+ fda = to_binder_fd_array_object(hdr);
+ parent = binder_validate_ptr(buffer, fda->parent,
+ off_start,
+ offp - off_start);
+ if (!parent) {
+ pr_err("transaction release %d bad parent offset",
+ debug_id);
+ continue;
+ }
+ /*
+ * Since the parent was already fixed up, convert it
+ * back to kernel address space to access it
+ */
+ parent_buffer = parent->buffer -
+ proc->user_buffer_offset;
+
+ fd_buf_size = sizeof(u32) * fda->num_fds;
+ if (fda->num_fds >= SIZE_MAX / sizeof(u32)) {
+ pr_err("transaction release %d invalid number of fds (%lld)\n",
+ debug_id, (u64)fda->num_fds);
+ continue;
+ }
+ if (fd_buf_size > parent->length ||
+ fda->parent_offset > parent->length - fd_buf_size) {
+ /* No space for all file descriptors here. */
+ pr_err("transaction release %d not enough space for %lld fds in buffer\n",
+ debug_id, (u64)fda->num_fds);
+ continue;
+ }
+ fd_array = (u32 *)(parent_buffer + fda->parent_offset);
+ for (fd_index = 0; fd_index < fda->num_fds; fd_index++)
+ task_close_fd(proc, fd_array[fd_index]);
+ } break;
default:
pr_err("transaction release %d bad object type %x\n",
- debug_id, fp->type);
+ debug_id, hdr->type);
break;
}
}
}
+static int binder_translate_binder(struct flat_binder_object *fp,
+ struct binder_transaction *t,
+ struct binder_thread *thread)
+{
+ struct binder_node *node;
+ struct binder_ref *ref;
+ struct binder_proc *proc = thread->proc;
+ struct binder_proc *target_proc = t->to_proc;
+
+ node = binder_get_node(proc, fp->binder);
+ if (!node) {
+ node = binder_new_node(proc, fp->binder, fp->cookie);
+ if (!node)
+ return -ENOMEM;
+
+ node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK;
+ node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS);
+ }
+ if (fp->cookie != node->cookie) {
+ binder_user_error("%d:%d sending u%016llx node %d, cookie mismatch %016llx != %016llx\n",
+ proc->pid, thread->pid, (u64)fp->binder,
+ node->debug_id, (u64)fp->cookie,
+ (u64)node->cookie);
+ return -EINVAL;
+ }
+ if (security_binder_transfer_binder(proc->tsk, target_proc->tsk))
+ return -EPERM;
+
+ ref = binder_get_ref_for_node(target_proc, node);
+ if (!ref)
+ return -EINVAL;
+
+ if (fp->hdr.type == BINDER_TYPE_BINDER)
+ fp->hdr.type = BINDER_TYPE_HANDLE;
+ else
+ fp->hdr.type = BINDER_TYPE_WEAK_HANDLE;
+ fp->binder = 0;
+ fp->handle = ref->desc;
+ fp->cookie = 0;
+ binder_inc_ref(ref, fp->hdr.type == BINDER_TYPE_HANDLE, &thread->todo);
+
+ trace_binder_transaction_node_to_ref(t, node, ref);
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " node %d u%016llx -> ref %d desc %d\n",
+ node->debug_id, (u64)node->ptr,
+ ref->debug_id, ref->desc);
+
+ return 0;
+}
+
+static int binder_translate_handle(struct flat_binder_object *fp,
+ struct binder_transaction *t,
+ struct binder_thread *thread)
+{
+ struct binder_ref *ref;
+ struct binder_proc *proc = thread->proc;
+ struct binder_proc *target_proc = t->to_proc;
+
+ ref = binder_get_ref(proc, fp->handle,
+ fp->hdr.type == BINDER_TYPE_HANDLE);
+ if (!ref) {
+ binder_user_error("%d:%d got transaction with invalid handle, %d\n",
+ proc->pid, thread->pid, fp->handle);
+ return -EINVAL;
+ }
+ if (security_binder_transfer_binder(proc->tsk, target_proc->tsk))
+ return -EPERM;
+
+ if (ref->node->proc == target_proc) {
+ if (fp->hdr.type == BINDER_TYPE_HANDLE)
+ fp->hdr.type = BINDER_TYPE_BINDER;
+ else
+ fp->hdr.type = BINDER_TYPE_WEAK_BINDER;
+ fp->binder = ref->node->ptr;
+ fp->cookie = ref->node->cookie;
+ binder_inc_node(ref->node, fp->hdr.type == BINDER_TYPE_BINDER,
+ 0, NULL);
+ trace_binder_transaction_ref_to_node(t, ref);
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " ref %d desc %d -> node %d u%016llx\n",
+ ref->debug_id, ref->desc, ref->node->debug_id,
+ (u64)ref->node->ptr);
+ } else {
+ struct binder_ref *new_ref;
+
+ new_ref = binder_get_ref_for_node(target_proc, ref->node);
+ if (!new_ref)
+ return -EINVAL;
+
+ fp->binder = 0;
+ fp->handle = new_ref->desc;
+ fp->cookie = 0;
+ binder_inc_ref(new_ref, fp->hdr.type == BINDER_TYPE_HANDLE,
+ NULL);
+ trace_binder_transaction_ref_to_ref(t, ref, new_ref);
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " ref %d desc %d -> ref %d desc %d (node %d)\n",
+ ref->debug_id, ref->desc, new_ref->debug_id,
+ new_ref->desc, ref->node->debug_id);
+ }
+ return 0;
+}
+
+static int binder_translate_fd(int fd,
+ struct binder_transaction *t,
+ struct binder_thread *thread,
+ struct binder_transaction *in_reply_to)
+{
+ struct binder_proc *proc = thread->proc;
+ struct binder_proc *target_proc = t->to_proc;
+ int target_fd;
+ struct file *file;
+ int ret;
+ bool target_allows_fd;
+
+ if (in_reply_to)
+ target_allows_fd = !!(in_reply_to->flags & TF_ACCEPT_FDS);
+ else
+ target_allows_fd = t->buffer->target_node->accept_fds;
+ if (!target_allows_fd) {
+ binder_user_error("%d:%d got %s with fd, %d, but target does not allow fds\n",
+ proc->pid, thread->pid,
+ in_reply_to ? "reply" : "transaction",
+ fd);
+ ret = -EPERM;
+ goto err_fd_not_accepted;
+ }
+
+ file = fget(fd);
+ if (!file) {
+ binder_user_error("%d:%d got transaction with invalid fd, %d\n",
+ proc->pid, thread->pid, fd);
+ ret = -EBADF;
+ goto err_fget;
+ }
+ ret = security_binder_transfer_file(proc->tsk, target_proc->tsk, file);
+ if (ret < 0) {
+ ret = -EPERM;
+ goto err_security;
+ }
+
+ target_fd = task_get_unused_fd_flags(target_proc, O_CLOEXEC);
+ if (target_fd < 0) {
+ ret = -ENOMEM;
+ goto err_get_unused_fd;
+ }
+ task_fd_install(target_proc, target_fd, file);
+ trace_binder_transaction_fd(t, fd, target_fd);
+ binder_debug(BINDER_DEBUG_TRANSACTION, " fd %d -> %d\n",
+ fd, target_fd);
+
+ return target_fd;
+
+err_get_unused_fd:
+err_security:
+ fput(file);
+err_fget:
+err_fd_not_accepted:
+ return ret;
+}
+
+static int binder_translate_fd_array(struct binder_fd_array_object *fda,
+ struct binder_buffer_object *parent,
+ struct binder_transaction *t,
+ struct binder_thread *thread,
+ struct binder_transaction *in_reply_to)
+{
+ binder_size_t fdi, fd_buf_size, num_installed_fds;
+ int target_fd;
+ uintptr_t parent_buffer;
+ u32 *fd_array;
+ struct binder_proc *proc = thread->proc;
+ struct binder_proc *target_proc = t->to_proc;
+
+ fd_buf_size = sizeof(u32) * fda->num_fds;
+ if (fda->num_fds >= SIZE_MAX / sizeof(u32)) {
+ binder_user_error("%d:%d got transaction with invalid number of fds (%lld)\n",
+ proc->pid, thread->pid, (u64)fda->num_fds);
+ return -EINVAL;
+ }
+ if (fd_buf_size > parent->length ||
+ fda->parent_offset > parent->length - fd_buf_size) {
+ /* No space for all file descriptors here. */
+ binder_user_error("%d:%d not enough space to store %lld fds in buffer\n",
+ proc->pid, thread->pid, (u64)fda->num_fds);
+ return -EINVAL;
+ }
+ /*
+ * Since the parent was already fixed up, convert it
+ * back to the kernel address space to access it
+ */
+ parent_buffer = parent->buffer - target_proc->user_buffer_offset;
+ fd_array = (u32 *)(parent_buffer + fda->parent_offset);
+ if (!IS_ALIGNED((unsigned long)fd_array, sizeof(u32))) {
+ binder_user_error("%d:%d parent offset not aligned correctly.\n",
+ proc->pid, thread->pid);
+ return -EINVAL;
+ }
+ for (fdi = 0; fdi < fda->num_fds; fdi++) {
+ target_fd = binder_translate_fd(fd_array[fdi], t, thread,
+ in_reply_to);
+ if (target_fd < 0)
+ goto err_translate_fd_failed;
+ fd_array[fdi] = target_fd;
+ }
+ return 0;
+
+err_translate_fd_failed:
+ /*
+ * Failed to allocate fd or security error, free fds
+ * installed so far.
+ */
+ num_installed_fds = fdi;
+ for (fdi = 0; fdi < num_installed_fds; fdi++)
+ task_close_fd(target_proc, fd_array[fdi]);
+ return target_fd;
+}
+
+static int binder_fixup_parent(struct binder_transaction *t,
+ struct binder_thread *thread,
+ struct binder_buffer_object *bp,
+ binder_size_t *off_start,
+ binder_size_t num_valid,
+ struct binder_buffer_object *last_fixup_obj,
+ binder_size_t last_fixup_min_off)
+{
+ struct binder_buffer_object *parent;
+ u8 *parent_buffer;
+ struct binder_buffer *b = t->buffer;
+ struct binder_proc *proc = thread->proc;
+ struct binder_proc *target_proc = t->to_proc;
+
+ if (!(bp->flags & BINDER_BUFFER_FLAG_HAS_PARENT))
+ return 0;
+
+ parent = binder_validate_ptr(b, bp->parent, off_start, num_valid);
+ if (!parent) {
+ binder_user_error("%d:%d got transaction with invalid parent offset or type\n",
+ proc->pid, thread->pid);
+ return -EINVAL;
+ }
+
+ if (!binder_validate_fixup(b, off_start,
+ parent, bp->parent_offset,
+ last_fixup_obj,
+ last_fixup_min_off)) {
+ binder_user_error("%d:%d got transaction with out-of-order buffer fixup\n",
+ proc->pid, thread->pid);
+ return -EINVAL;
+ }
+
+ if (parent->length < sizeof(binder_uintptr_t) ||
+ bp->parent_offset > parent->length - sizeof(binder_uintptr_t)) {
+ /* No space for a pointer here! */
+ binder_user_error("%d:%d got transaction with invalid parent offset\n",
+ proc->pid, thread->pid);
+ return -EINVAL;
+ }
+ parent_buffer = (u8 *)(parent->buffer -
+ target_proc->user_buffer_offset);
+ *(binder_uintptr_t *)(parent_buffer + bp->parent_offset) = bp->buffer;
+
+ return 0;
+}
+
static void binder_transaction(struct binder_proc *proc,
struct binder_thread *thread,
- struct binder_transaction_data *tr, int reply)
+ struct binder_transaction_data *tr, int reply,
+ binder_size_t extra_buffers_size)
{
+ int ret;
struct binder_transaction *t;
struct binder_work *tcomplete;
- binder_size_t *offp, *off_end;
+ binder_size_t *offp, *off_end, *off_start;
+ binder_size_t off_min;
+ u8 *sg_bufp, *sg_buf_end;
struct binder_proc *target_proc;
struct binder_thread *target_thread = NULL;
struct binder_node *target_node = NULL;
@@ -1336,6 +1845,9 @@ static void binder_transaction(struct binder_proc *proc,
struct binder_transaction *in_reply_to = NULL;
struct binder_transaction_log_entry *e;
uint32_t return_error;
+ struct binder_buffer_object *last_fixup_obj = NULL;
+ binder_size_t last_fixup_min_off = 0;
+ struct binder_context *context = proc->context;
e = binder_transaction_log_add(&binder_transaction_log);
e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY);
@@ -1344,6 +1856,7 @@ static void binder_transaction(struct binder_proc *proc,
e->target_handle = tr->target.handle;
e->data_size = tr->data_size;
e->offsets_size = tr->offsets_size;
+ e->context_name = proc->context->name;
if (reply) {
in_reply_to = thread->transaction_stack;
@@ -1396,7 +1909,7 @@ static void binder_transaction(struct binder_proc *proc,
}
target_node = ref->node;
} else {
- target_node = binder_context_mgr_node;
+ target_node = context->binder_context_mgr_node;
if (target_node == NULL) {
return_error = BR_DEAD_REPLY;
goto err_no_context_mgr_node;
@@ -1463,20 +1976,22 @@ static void binder_transaction(struct binder_proc *proc,
if (reply)
binder_debug(BINDER_DEBUG_TRANSACTION,
- "%d:%d BC_REPLY %d -> %d:%d, data %016llx-%016llx size %lld-%lld\n",
+ "%d:%d BC_REPLY %d -> %d:%d, data %016llx-%016llx size %lld-%lld-%lld\n",
proc->pid, thread->pid, t->debug_id,
target_proc->pid, target_thread->pid,
(u64)tr->data.ptr.buffer,
(u64)tr->data.ptr.offsets,
- (u64)tr->data_size, (u64)tr->offsets_size);
+ (u64)tr->data_size, (u64)tr->offsets_size,
+ (u64)extra_buffers_size);
else
binder_debug(BINDER_DEBUG_TRANSACTION,
- "%d:%d BC_TRANSACTION %d -> %d - node %d, data %016llx-%016llx size %lld-%lld\n",
+ "%d:%d BC_TRANSACTION %d -> %d - node %d, data %016llx-%016llx size %lld-%lld-%lld\n",
proc->pid, thread->pid, t->debug_id,
target_proc->pid, target_node->debug_id,
(u64)tr->data.ptr.buffer,
(u64)tr->data.ptr.offsets,
- (u64)tr->data_size, (u64)tr->offsets_size);
+ (u64)tr->data_size, (u64)tr->offsets_size,
+ (u64)extra_buffers_size);
if (!reply && !(tr->flags & TF_ONE_WAY))
t->from = thread;
@@ -1492,7 +2007,8 @@ static void binder_transaction(struct binder_proc *proc,
trace_binder_transaction(reply, t, target_node);
t->buffer = binder_alloc_buf(target_proc, tr->data_size,
- tr->offsets_size, !reply && (t->flags & TF_ONE_WAY));
+ tr->offsets_size, extra_buffers_size,
+ !reply && (t->flags & TF_ONE_WAY));
if (t->buffer == NULL) {
return_error = BR_FAILED_REPLY;
goto err_binder_alloc_buf_failed;
@@ -1505,8 +2021,9 @@ static void binder_transaction(struct binder_proc *proc,
if (target_node)
binder_inc_node(target_node, 1, 0, NULL);
- offp = (binder_size_t *)(t->buffer->data +
- ALIGN(tr->data_size, sizeof(void *)));
+ off_start = (binder_size_t *)(t->buffer->data +
+ ALIGN(tr->data_size, sizeof(void *)));
+ offp = off_start;
if (copy_from_user(t->buffer->data, (const void __user *)(uintptr_t)
tr->data.ptr.buffer, tr->data_size)) {
@@ -1528,171 +2045,138 @@ static void binder_transaction(struct binder_proc *proc,
return_error = BR_FAILED_REPLY;
goto err_bad_offset;
}
- off_end = (void *)offp + tr->offsets_size;
+ if (!IS_ALIGNED(extra_buffers_size, sizeof(u64))) {
+ binder_user_error("%d:%d got transaction with unaligned buffers size, %lld\n",
+ proc->pid, thread->pid,
+ (u64)extra_buffers_size);
+ return_error = BR_FAILED_REPLY;
+ goto err_bad_offset;
+ }
+ off_end = (void *)off_start + tr->offsets_size;
+ sg_bufp = (u8 *)(PTR_ALIGN(off_end, sizeof(void *)));
+ sg_buf_end = sg_bufp + extra_buffers_size;
+ off_min = 0;
for (; offp < off_end; offp++) {
- struct flat_binder_object *fp;
-
- if (*offp > t->buffer->data_size - sizeof(*fp) ||
- t->buffer->data_size < sizeof(*fp) ||
- !IS_ALIGNED(*offp, sizeof(u32))) {
- binder_user_error("%d:%d got transaction with invalid offset, %lld\n",
- proc->pid, thread->pid, (u64)*offp);
+ struct binder_object_header *hdr;
+ size_t object_size = binder_validate_object(t->buffer, *offp);
+
+ if (object_size == 0 || *offp < off_min) {
+ binder_user_error("%d:%d got transaction with invalid offset (%lld, min %lld max %lld) or object.\n",
+ proc->pid, thread->pid, (u64)*offp,
+ (u64)off_min,
+ (u64)t->buffer->data_size);
return_error = BR_FAILED_REPLY;
goto err_bad_offset;
}
- fp = (struct flat_binder_object *)(t->buffer->data + *offp);
- switch (fp->type) {
+
+ hdr = (struct binder_object_header *)(t->buffer->data + *offp);
+ off_min = *offp + object_size;
+ switch (hdr->type) {
case BINDER_TYPE_BINDER:
case BINDER_TYPE_WEAK_BINDER: {
- struct binder_ref *ref;
- struct binder_node *node = binder_get_node(proc, fp->binder);
+ struct flat_binder_object *fp;
- if (node == NULL) {
- node = binder_new_node(proc, fp->binder, fp->cookie);
- if (node == NULL) {
- return_error = BR_FAILED_REPLY;
- goto err_binder_new_node_failed;
- }
- node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK;
- node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS);
- }
- if (fp->cookie != node->cookie) {
- binder_user_error("%d:%d sending u%016llx node %d, cookie mismatch %016llx != %016llx\n",
- proc->pid, thread->pid,
- (u64)fp->binder, node->debug_id,
- (u64)fp->cookie, (u64)node->cookie);
+ fp = to_flat_binder_object(hdr);
+ ret = binder_translate_binder(fp, t, thread);
+ if (ret < 0) {
return_error = BR_FAILED_REPLY;
- goto err_binder_get_ref_for_node_failed;
+ goto err_translate_failed;
}
- if (security_binder_transfer_binder(proc->tsk,
- target_proc->tsk)) {
- return_error = BR_FAILED_REPLY;
- goto err_binder_get_ref_for_node_failed;
- }
- ref = binder_get_ref_for_node(target_proc, node);
- if (ref == NULL) {
- return_error = BR_FAILED_REPLY;
- goto err_binder_get_ref_for_node_failed;
- }
- if (fp->type == BINDER_TYPE_BINDER)
- fp->type = BINDER_TYPE_HANDLE;
- else
- fp->type = BINDER_TYPE_WEAK_HANDLE;
- fp->binder = 0;
- fp->handle = ref->desc;
- fp->cookie = 0;
- binder_inc_ref(ref, fp->type == BINDER_TYPE_HANDLE,
- &thread->todo);
-
- trace_binder_transaction_node_to_ref(t, node, ref);
- binder_debug(BINDER_DEBUG_TRANSACTION,
- " node %d u%016llx -> ref %d desc %d\n",
- node->debug_id, (u64)node->ptr,
- ref->debug_id, ref->desc);
} break;
case BINDER_TYPE_HANDLE:
case BINDER_TYPE_WEAK_HANDLE: {
- struct binder_ref *ref;
+ struct flat_binder_object *fp;
- ref = binder_get_ref(proc, fp->handle,
- fp->type == BINDER_TYPE_HANDLE);
+ fp = to_flat_binder_object(hdr);
+ ret = binder_translate_handle(fp, t, thread);
+ if (ret < 0) {
+ return_error = BR_FAILED_REPLY;
+ goto err_translate_failed;
+ }
+ } break;
- if (ref == NULL) {
- binder_user_error("%d:%d got transaction with invalid handle, %d\n",
- proc->pid,
- thread->pid, fp->handle);
+ case BINDER_TYPE_FD: {
+ struct binder_fd_object *fp = to_binder_fd_object(hdr);
+ int target_fd = binder_translate_fd(fp->fd, t, thread,
+ in_reply_to);
+
+ if (target_fd < 0) {
return_error = BR_FAILED_REPLY;
- goto err_binder_get_ref_failed;
+ goto err_translate_failed;
}
- if (security_binder_transfer_binder(proc->tsk,
- target_proc->tsk)) {
+ fp->pad_binder = 0;
+ fp->fd = target_fd;
+ } break;
+ case BINDER_TYPE_FDA: {
+ struct binder_fd_array_object *fda =
+ to_binder_fd_array_object(hdr);
+ struct binder_buffer_object *parent =
+ binder_validate_ptr(t->buffer, fda->parent,
+ off_start,
+ offp - off_start);
+ if (!parent) {
+ binder_user_error("%d:%d got transaction with invalid parent offset or type\n",
+ proc->pid, thread->pid);
return_error = BR_FAILED_REPLY;
- goto err_binder_get_ref_failed;
+ goto err_bad_parent;
}
- if (ref->node->proc == target_proc) {
- if (fp->type == BINDER_TYPE_HANDLE)
- fp->type = BINDER_TYPE_BINDER;
- else
- fp->type = BINDER_TYPE_WEAK_BINDER;
- fp->binder = ref->node->ptr;
- fp->cookie = ref->node->cookie;
- binder_inc_node(ref->node, fp->type == BINDER_TYPE_BINDER, 0, NULL);
- trace_binder_transaction_ref_to_node(t, ref);
- binder_debug(BINDER_DEBUG_TRANSACTION,
- " ref %d desc %d -> node %d u%016llx\n",
- ref->debug_id, ref->desc, ref->node->debug_id,
- (u64)ref->node->ptr);
- } else {
- struct binder_ref *new_ref;
-
- new_ref = binder_get_ref_for_node(target_proc, ref->node);
- if (new_ref == NULL) {
- return_error = BR_FAILED_REPLY;
- goto err_binder_get_ref_for_node_failed;
- }
- fp->binder = 0;
- fp->handle = new_ref->desc;
- fp->cookie = 0;
- binder_inc_ref(new_ref, fp->type == BINDER_TYPE_HANDLE, NULL);
- trace_binder_transaction_ref_to_ref(t, ref,
- new_ref);
- binder_debug(BINDER_DEBUG_TRANSACTION,
- " ref %d desc %d -> ref %d desc %d (node %d)\n",
- ref->debug_id, ref->desc, new_ref->debug_id,
- new_ref->desc, ref->node->debug_id);
+ if (!binder_validate_fixup(t->buffer, off_start,
+ parent, fda->parent_offset,
+ last_fixup_obj,
+ last_fixup_min_off)) {
+ binder_user_error("%d:%d got transaction with out-of-order buffer fixup\n",
+ proc->pid, thread->pid);
+ return_error = BR_FAILED_REPLY;
+ goto err_bad_parent;
}
- } break;
-
- case BINDER_TYPE_FD: {
- int target_fd;
- struct file *file;
-
- if (reply) {
- if (!(in_reply_to->flags & TF_ACCEPT_FDS)) {
- binder_user_error("%d:%d got reply with fd, %d, but target does not allow fds\n",
- proc->pid, thread->pid, fp->handle);
- return_error = BR_FAILED_REPLY;
- goto err_fd_not_allowed;
- }
- } else if (!target_node->accept_fds) {
- binder_user_error("%d:%d got transaction with fd, %d, but target does not allow fds\n",
- proc->pid, thread->pid, fp->handle);
+ ret = binder_translate_fd_array(fda, parent, t, thread,
+ in_reply_to);
+ if (ret < 0) {
return_error = BR_FAILED_REPLY;
- goto err_fd_not_allowed;
+ goto err_translate_failed;
}
-
- file = fget(fp->handle);
- if (file == NULL) {
- binder_user_error("%d:%d got transaction with invalid fd, %d\n",
- proc->pid, thread->pid, fp->handle);
+ last_fixup_obj = parent;
+ last_fixup_min_off =
+ fda->parent_offset + sizeof(u32) * fda->num_fds;
+ } break;
+ case BINDER_TYPE_PTR: {
+ struct binder_buffer_object *bp =
+ to_binder_buffer_object(hdr);
+ size_t buf_left = sg_buf_end - sg_bufp;
+
+ if (bp->length > buf_left) {
+ binder_user_error("%d:%d got transaction with too large buffer\n",
+ proc->pid, thread->pid);
return_error = BR_FAILED_REPLY;
- goto err_fget_failed;
+ goto err_bad_offset;
}
- if (security_binder_transfer_file(proc->tsk,
- target_proc->tsk,
- file) < 0) {
- fput(file);
+ if (copy_from_user(sg_bufp,
+ (const void __user *)(uintptr_t)
+ bp->buffer, bp->length)) {
+ binder_user_error("%d:%d got transaction with invalid offsets ptr\n",
+ proc->pid, thread->pid);
return_error = BR_FAILED_REPLY;
- goto err_get_unused_fd_failed;
+ goto err_copy_data_failed;
}
- target_fd = task_get_unused_fd_flags(target_proc, O_CLOEXEC);
- if (target_fd < 0) {
- fput(file);
+ /* Fixup buffer pointer to target proc address space */
+ bp->buffer = (uintptr_t)sg_bufp +
+ target_proc->user_buffer_offset;
+ sg_bufp += ALIGN(bp->length, sizeof(u64));
+
+ ret = binder_fixup_parent(t, thread, bp, off_start,
+ offp - off_start,
+ last_fixup_obj,
+ last_fixup_min_off);
+ if (ret < 0) {
return_error = BR_FAILED_REPLY;
- goto err_get_unused_fd_failed;
+ goto err_translate_failed;
}
- task_fd_install(target_proc, target_fd, file);
- trace_binder_transaction_fd(t, fp->handle, target_fd);
- binder_debug(BINDER_DEBUG_TRANSACTION,
- " fd %d -> %d\n", fp->handle, target_fd);
- /* TODO: fput? */
- fp->binder = 0;
- fp->handle = target_fd;
+ last_fixup_obj = bp;
+ last_fixup_min_off = 0;
} break;
-
default:
binder_user_error("%d:%d got transaction with invalid object type, %x\n",
- proc->pid, thread->pid, fp->type);
+ proc->pid, thread->pid, hdr->type);
return_error = BR_FAILED_REPLY;
goto err_bad_object_type;
}
@@ -1722,14 +2206,10 @@ static void binder_transaction(struct binder_proc *proc,
wake_up_interruptible(target_wait);
return;
-err_get_unused_fd_failed:
-err_fget_failed:
-err_fd_not_allowed:
-err_binder_get_ref_for_node_failed:
-err_binder_get_ref_failed:
-err_binder_new_node_failed:
+err_translate_failed:
err_bad_object_type:
err_bad_offset:
+err_bad_parent:
err_copy_data_failed:
trace_binder_transaction_failed_buffer_release(t->buffer);
binder_transaction_buffer_release(target_proc, t->buffer, offp);
@@ -1773,6 +2253,7 @@ static int binder_thread_write(struct binder_proc *proc,
binder_size_t *consumed)
{
uint32_t cmd;
+ struct binder_context *context = proc->context;
void __user *buffer = (void __user *)(uintptr_t)binder_buffer;
void __user *ptr = buffer + *consumed;
void __user *end = buffer + size;
@@ -1799,10 +2280,10 @@ static int binder_thread_write(struct binder_proc *proc,
if (get_user(target, (uint32_t __user *)ptr))
return -EFAULT;
ptr += sizeof(uint32_t);
- if (target == 0 && binder_context_mgr_node &&
+ if (target == 0 && context->binder_context_mgr_node &&
(cmd == BC_INCREFS || cmd == BC_ACQUIRE)) {
ref = binder_get_ref_for_node(proc,
- binder_context_mgr_node);
+ context->binder_context_mgr_node);
if (ref->desc != target) {
binder_user_error("%d:%d tried to acquire reference to desc 0, got %d instead\n",
proc->pid, thread->pid,
@@ -1947,6 +2428,17 @@ static int binder_thread_write(struct binder_proc *proc,
break;
}
+ case BC_TRANSACTION_SG:
+ case BC_REPLY_SG: {
+ struct binder_transaction_data_sg tr;
+
+ if (copy_from_user(&tr, ptr, sizeof(tr)))
+ return -EFAULT;
+ ptr += sizeof(tr);
+ binder_transaction(proc, thread, &tr.transaction_data,
+ cmd == BC_REPLY_SG, tr.buffers_size);
+ break;
+ }
case BC_TRANSACTION:
case BC_REPLY: {
struct binder_transaction_data tr;
@@ -1954,7 +2446,8 @@ static int binder_thread_write(struct binder_proc *proc,
if (copy_from_user(&tr, ptr, sizeof(tr)))
return -EFAULT;
ptr += sizeof(tr);
- binder_transaction(proc, thread, &tr, cmd == BC_REPLY);
+ binder_transaction(proc, thread, &tr,
+ cmd == BC_REPLY, 0);
break;
}
@@ -2708,9 +3201,11 @@ static int binder_ioctl_set_ctx_mgr(struct file *filp)
{
int ret = 0;
struct binder_proc *proc = filp->private_data;
+ struct binder_context *context = proc->context;
+
kuid_t curr_euid = current_euid();
- if (binder_context_mgr_node != NULL) {
+ if (context->binder_context_mgr_node) {
pr_err("BINDER_SET_CONTEXT_MGR already set\n");
ret = -EBUSY;
goto out;
@@ -2718,27 +3213,27 @@ static int binder_ioctl_set_ctx_mgr(struct file *filp)
ret = security_binder_set_context_mgr(proc->tsk);
if (ret < 0)
goto out;
- if (uid_valid(binder_context_mgr_uid)) {
- if (!uid_eq(binder_context_mgr_uid, curr_euid)) {
+ if (uid_valid(context->binder_context_mgr_uid)) {
+ if (!uid_eq(context->binder_context_mgr_uid, curr_euid)) {
pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n",
from_kuid(&init_user_ns, curr_euid),
from_kuid(&init_user_ns,
- binder_context_mgr_uid));
+ context->binder_context_mgr_uid));
ret = -EPERM;
goto out;
}
} else {
- binder_context_mgr_uid = curr_euid;
+ context->binder_context_mgr_uid = curr_euid;
}
- binder_context_mgr_node = binder_new_node(proc, 0, 0);
- if (binder_context_mgr_node == NULL) {
+ context->binder_context_mgr_node = binder_new_node(proc, 0, 0);
+ if (!context->binder_context_mgr_node) {
ret = -ENOMEM;
goto out;
}
- binder_context_mgr_node->local_weak_refs++;
- binder_context_mgr_node->local_strong_refs++;
- binder_context_mgr_node->has_strong_ref = 1;
- binder_context_mgr_node->has_weak_ref = 1;
+ context->binder_context_mgr_node->local_weak_refs++;
+ context->binder_context_mgr_node->local_strong_refs++;
+ context->binder_context_mgr_node->has_strong_ref = 1;
+ context->binder_context_mgr_node->has_weak_ref = 1;
out:
return ret;
}
@@ -2959,6 +3454,7 @@ err_bad_arg:
static int binder_open(struct inode *nodp, struct file *filp)
{
struct binder_proc *proc;
+ struct binder_device *binder_dev;
binder_debug(BINDER_DEBUG_OPEN_CLOSE, "binder_open: %d:%d\n",
current->group_leader->pid, current->pid);
@@ -2971,6 +3467,9 @@ static int binder_open(struct inode *nodp, struct file *filp)
INIT_LIST_HEAD(&proc->todo);
init_waitqueue_head(&proc->wait);
proc->default_priority = task_nice(current);
+ binder_dev = container_of(filp->private_data, struct binder_device,
+ miscdev);
+ proc->context = &binder_dev->context;
binder_lock(__func__);
@@ -2986,8 +3485,17 @@ static int binder_open(struct inode *nodp, struct file *filp)
char strbuf[11];
snprintf(strbuf, sizeof(strbuf), "%u", proc->pid);
+ /*
+ * proc debug entries are shared between contexts, so
+ * this will fail if the process tries to open the driver
+ * again with a different context. The priting code will
+ * anyway print all contexts that a given PID has, so this
+ * is not a problem.
+ */
proc->debugfs_entry = debugfs_create_file(strbuf, S_IRUGO,
- binder_debugfs_dir_entry_proc, proc, &binder_proc_fops);
+ binder_debugfs_dir_entry_proc,
+ (void *)(unsigned long)proc->pid,
+ &binder_proc_fops);
}
return 0;
@@ -3080,6 +3588,7 @@ static int binder_node_release(struct binder_node *node, int refs)
static void binder_deferred_release(struct binder_proc *proc)
{
struct binder_transaction *t;
+ struct binder_context *context = proc->context;
struct rb_node *n;
int threads, nodes, incoming_refs, outgoing_refs, buffers,
active_transactions, page_count;
@@ -3089,11 +3598,12 @@ static void binder_deferred_release(struct binder_proc *proc)
hlist_del(&proc->proc_node);
- if (binder_context_mgr_node && binder_context_mgr_node->proc == proc) {
+ if (context->binder_context_mgr_node &&
+ context->binder_context_mgr_node->proc == proc) {
binder_debug(BINDER_DEBUG_DEAD_BINDER,
"%s: %d context_mgr_node gone\n",
__func__, proc->pid);
- binder_context_mgr_node = NULL;
+ context->binder_context_mgr_node = NULL;
}
threads = 0;
@@ -3380,6 +3890,7 @@ static void print_binder_proc(struct seq_file *m,
size_t header_pos;
seq_printf(m, "proc %d\n", proc->pid);
+ seq_printf(m, "context %s\n", proc->context->name);
header_pos = m->count;
for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
@@ -3449,7 +3960,9 @@ static const char * const binder_command_strings[] = {
"BC_EXIT_LOOPER",
"BC_REQUEST_DEATH_NOTIFICATION",
"BC_CLEAR_DEATH_NOTIFICATION",
- "BC_DEAD_BINDER_DONE"
+ "BC_DEAD_BINDER_DONE",
+ "BC_TRANSACTION_SG",
+ "BC_REPLY_SG",
};
static const char * const binder_objstat_strings[] = {
@@ -3504,6 +4017,7 @@ static void print_binder_proc_stats(struct seq_file *m,
int count, strong, weak;
seq_printf(m, "proc %d\n", proc->pid);
+ seq_printf(m, "context %s\n", proc->context->name);
count = 0;
for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
count++;
@@ -3610,13 +4124,19 @@ static int binder_transactions_show(struct seq_file *m, void *unused)
static int binder_proc_show(struct seq_file *m, void *unused)
{
- struct binder_proc *proc = m->private;
+ struct binder_proc *itr;
+ int pid = (unsigned long)m->private;
int do_lock = !binder_debug_no_lock;
if (do_lock)
binder_lock(__func__);
- seq_puts(m, "binder proc state:\n");
- print_binder_proc(m, proc, 1);
+
+ hlist_for_each_entry(itr, &binder_procs, proc_node) {
+ if (itr->pid == pid) {
+ seq_puts(m, "binder proc state:\n");
+ print_binder_proc(m, itr, 1);
+ }
+ }
if (do_lock)
binder_unlock(__func__);
return 0;
@@ -3626,11 +4146,11 @@ static void print_binder_transaction_log_entry(struct seq_file *m,
struct binder_transaction_log_entry *e)
{
seq_printf(m,
- "%d: %s from %d:%d to %d:%d node %d handle %d size %d:%d\n",
+ "%d: %s from %d:%d to %d:%d context %s node %d handle %d size %d:%d\n",
e->debug_id, (e->call_type == 2) ? "reply" :
((e->call_type == 1) ? "async" : "call "), e->from_proc,
- e->from_thread, e->to_proc, e->to_thread, e->to_node,
- e->target_handle, e->data_size, e->offsets_size);
+ e->from_thread, e->to_proc, e->to_thread, e->context_name,
+ e->to_node, e->target_handle, e->data_size, e->offsets_size);
}
static int binder_transaction_log_show(struct seq_file *m, void *unused)
@@ -3658,20 +4178,44 @@ static const struct file_operations binder_fops = {
.release = binder_release,
};
-static struct miscdevice binder_miscdev = {
- .minor = MISC_DYNAMIC_MINOR,
- .name = "binder",
- .fops = &binder_fops
-};
-
BINDER_DEBUG_ENTRY(state);
BINDER_DEBUG_ENTRY(stats);
BINDER_DEBUG_ENTRY(transactions);
BINDER_DEBUG_ENTRY(transaction_log);
+static int __init init_binder_device(const char *name)
+{
+ int ret;
+ struct binder_device *binder_device;
+
+ binder_device = kzalloc(sizeof(*binder_device), GFP_KERNEL);
+ if (!binder_device)
+ return -ENOMEM;
+
+ binder_device->miscdev.fops = &binder_fops;
+ binder_device->miscdev.minor = MISC_DYNAMIC_MINOR;
+ binder_device->miscdev.name = name;
+
+ binder_device->context.binder_context_mgr_uid = INVALID_UID;
+ binder_device->context.name = name;
+
+ ret = misc_register(&binder_device->miscdev);
+ if (ret < 0) {
+ kfree(binder_device);
+ return ret;
+ }
+
+ hlist_add_head(&binder_device->hlist, &binder_devices);
+
+ return ret;
+}
+
static int __init binder_init(void)
{
int ret;
+ char *device_name, *device_names;
+ struct binder_device *device;
+ struct hlist_node *tmp;
binder_deferred_workqueue = create_singlethread_workqueue("binder");
if (!binder_deferred_workqueue)
@@ -3681,7 +4225,7 @@ static int __init binder_init(void)
if (binder_debugfs_dir_entry_root)
binder_debugfs_dir_entry_proc = debugfs_create_dir("proc",
binder_debugfs_dir_entry_root);
- ret = misc_register(&binder_miscdev);
+
if (binder_debugfs_dir_entry_root) {
debugfs_create_file("state",
S_IRUGO,
@@ -3709,6 +4253,37 @@ static int __init binder_init(void)
&binder_transaction_log_failed,
&binder_transaction_log_fops);
}
+
+ /*
+ * Copy the module_parameter string, because we don't want to
+ * tokenize it in-place.
+ */
+ device_names = kzalloc(strlen(binder_devices_param) + 1, GFP_KERNEL);
+ if (!device_names) {
+ ret = -ENOMEM;
+ goto err_alloc_device_names_failed;
+ }
+ strcpy(device_names, binder_devices_param);
+
+ while ((device_name = strsep(&device_names, ","))) {
+ ret = init_binder_device(device_name);
+ if (ret)
+ goto err_init_binder_device_failed;
+ }
+
+ return ret;
+
+err_init_binder_device_failed:
+ hlist_for_each_entry_safe(device, tmp, &binder_devices, hlist) {
+ misc_deregister(&device->miscdev);
+ hlist_del(&device->hlist);
+ kfree(device);
+ }
+err_alloc_device_names_failed:
+ debugfs_remove_recursive(binder_debugfs_dir_entry_root);
+
+ destroy_workqueue(binder_deferred_workqueue);
+
return ret;
}
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index a641cf3ccad6..9e425fbf83cb 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -205,6 +205,8 @@ static void driver_bound(struct device *dev)
klist_add_tail(&dev->p->knode_driver, &dev->driver->p->klist_devices);
+ device_pm_check_callbacks(dev);
+
/*
* Make sure the device is no longer in one of the deferred lists and
* kick off retrying all pending devices
@@ -697,6 +699,7 @@ static void __device_release_driver(struct device *dev)
dev->pm_domain->dismiss(dev);
klist_remove(&dev->p->knode_driver);
+ device_pm_check_callbacks(dev);
if (dev->bus)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_UNBOUND_DRIVER,
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index e9b713675c7c..6c5bc3fadfcf 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -33,6 +33,7 @@
#include <linux/cpufreq.h>
#include <linux/cpuidle.h>
#include <linux/timer.h>
+#include <linux/wakeup_reason.h>
#include "../base.h"
#include "power.h"
@@ -125,6 +126,7 @@ void device_pm_add(struct device *dev)
{
pr_debug("PM: Adding info for %s:%s\n",
dev->bus ? dev->bus->name : "No Bus", dev_name(dev));
+ device_pm_check_callbacks(dev);
mutex_lock(&dpm_list_mtx);
if (dev->parent && dev->parent->power.is_prepared)
dev_warn(dev, "parent %s should not be sleeping\n",
@@ -147,6 +149,7 @@ void device_pm_remove(struct device *dev)
mutex_unlock(&dpm_list_mtx);
device_wakeup_disable(dev);
pm_runtime_remove(dev);
+ device_pm_check_callbacks(dev);
}
/**
@@ -1348,6 +1351,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
pm_callback_t callback = NULL;
char *info = NULL;
int error = 0;
+ char suspend_abort[MAX_SUSPEND_ABORT_LEN];
DECLARE_DPM_WATCHDOG_ON_STACK(wd);
TRACE_DEVICE(dev);
@@ -1368,6 +1372,9 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
pm_wakeup_event(dev, 0);
if (pm_wakeup_pending()) {
+ pm_get_active_wakeup_sources(suspend_abort,
+ MAX_SUSPEND_ABORT_LEN);
+ log_suspend_abort_reason(suspend_abort);
async_error = -EBUSY;
goto Complete;
}
@@ -1570,6 +1577,11 @@ static int device_prepare(struct device *dev, pm_message_t state)
dev->power.wakeup_path = device_may_wakeup(dev);
+ if (dev->power.no_pm_callbacks) {
+ ret = 1; /* Let device go direct_complete */
+ goto unlock;
+ }
+
if (dev->pm_domain) {
info = "preparing power domain ";
callback = dev->pm_domain->ops.prepare;
@@ -1592,6 +1604,7 @@ static int device_prepare(struct device *dev, pm_message_t state)
if (callback)
ret = callback(dev);
+unlock:
device_unlock(dev);
if (ret < 0) {
@@ -1720,3 +1733,30 @@ void dpm_for_each_dev(void *data, void (*fn)(struct device *, void *))
device_pm_unlock();
}
EXPORT_SYMBOL_GPL(dpm_for_each_dev);
+
+static bool pm_ops_is_empty(const struct dev_pm_ops *ops)
+{
+ if (!ops)
+ return true;
+
+ return !ops->prepare &&
+ !ops->suspend &&
+ !ops->suspend_late &&
+ !ops->suspend_noirq &&
+ !ops->resume_noirq &&
+ !ops->resume_early &&
+ !ops->resume &&
+ !ops->complete;
+}
+
+void device_pm_check_callbacks(struct device *dev)
+{
+ spin_lock_irq(&dev->power.lock);
+ dev->power.no_pm_callbacks =
+ (!dev->bus || pm_ops_is_empty(dev->bus->pm)) &&
+ (!dev->class || pm_ops_is_empty(dev->class->pm)) &&
+ (!dev->type || pm_ops_is_empty(dev->type->pm)) &&
+ (!dev->pm_domain || pm_ops_is_empty(&dev->pm_domain->ops)) &&
+ (!dev->driver || pm_ops_is_empty(dev->driver->pm));
+ spin_unlock_irq(&dev->power.lock);
+}
diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h
index 01ac5b1aeaeb..297aa5cf393e 100644
--- a/drivers/base/power/power.h
+++ b/drivers/base/power/power.h
@@ -140,6 +140,7 @@ extern void device_pm_remove(struct device *);
extern void device_pm_move_before(struct device *, struct device *);
extern void device_pm_move_after(struct device *, struct device *);
extern void device_pm_move_last(struct device *);
+extern void device_pm_check_callbacks(struct device *dev);
#else /* !CONFIG_PM_SLEEP */
@@ -158,6 +159,8 @@ static inline void device_pm_move_after(struct device *deva,
struct device *devb) {}
static inline void device_pm_move_last(struct device *dev) {}
+static inline void device_pm_check_callbacks(struct device *dev) {}
+
#endif /* !CONFIG_PM_SLEEP */
static inline void device_pm_init(struct device *dev)
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index a1e0b9ab847a..09c07f519952 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -15,6 +15,7 @@
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <linux/pm_wakeirq.h>
+#include <linux/types.h>
#include <trace/events/power.h>
#include "power.h"
@@ -804,6 +805,37 @@ void pm_wakeup_event(struct device *dev, unsigned int msec)
}
EXPORT_SYMBOL_GPL(pm_wakeup_event);
+void pm_get_active_wakeup_sources(char *pending_wakeup_source, size_t max)
+{
+ struct wakeup_source *ws, *last_active_ws = NULL;
+ int len = 0;
+ bool active = false;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(ws, &wakeup_sources, entry) {
+ if (ws->active && len < max) {
+ if (!active)
+ len += scnprintf(pending_wakeup_source, max,
+ "Pending Wakeup Sources: ");
+ len += scnprintf(pending_wakeup_source + len, max - len,
+ "%s ", ws->name);
+ active = true;
+ } else if (!active &&
+ (!last_active_ws ||
+ ktime_to_ns(ws->last_time) >
+ ktime_to_ns(last_active_ws->last_time))) {
+ last_active_ws = ws;
+ }
+ }
+ if (!active && last_active_ws) {
+ scnprintf(pending_wakeup_source, max,
+ "Last active Wakeup Source: %s",
+ last_active_ws->name);
+ }
+ rcu_read_unlock();
+}
+EXPORT_SYMBOL_GPL(pm_get_active_wakeup_sources);
+
void pm_print_active_wakeup_sources(void)
{
struct wakeup_source *ws;
diff --git a/drivers/base/syscore.c b/drivers/base/syscore.c
index 8d98a329f6ea..96c34a95cc62 100644
--- a/drivers/base/syscore.c
+++ b/drivers/base/syscore.c
@@ -11,6 +11,7 @@
#include <linux/module.h>
#include <linux/suspend.h>
#include <trace/events/power.h>
+#include <linux/wakeup_reason.h>
static LIST_HEAD(syscore_ops_list);
static DEFINE_MUTEX(syscore_ops_lock);
@@ -75,6 +76,8 @@ int syscore_suspend(void)
return 0;
err_out:
+ log_suspend_abort_reason("System core suspend callback %pF failed",
+ ops->suspend);
pr_err("PM: System core suspend callback %pF failed.\n", ops->suspend);
list_for_each_entry_continue(ops, &syscore_ops_list, node)
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 491a4dce13fe..d93dfebae0bb 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1825,6 +1825,28 @@ unsigned int get_random_int(void)
EXPORT_SYMBOL(get_random_int);
/*
+ * Same as get_random_int(), but returns unsigned long.
+ */
+unsigned long get_random_long(void)
+{
+ __u32 *hash;
+ unsigned long ret;
+
+ if (arch_get_random_long(&ret))
+ return ret;
+
+ hash = get_cpu_var(get_random_int_hash);
+
+ hash[0] += current->pid + jiffies + random_get_entropy();
+ md5_transform(hash, random_int_secret);
+ ret = *(unsigned long *)hash;
+ put_cpu_var(get_random_int_hash);
+
+ return ret;
+}
+EXPORT_SYMBOL(get_random_long);
+
+/*
* randomize_range() returns a start address such that
*
* [...... <range> .....]
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index 659879a56dba..d43c401ff190 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -102,6 +102,24 @@ config CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
Be aware that not all cpufreq drivers support the conservative
governor. If unsure have a look at the help section of the
driver. Fallback governor will be the performance governor.
+
+config CPU_FREQ_DEFAULT_GOV_INTERACTIVE
+ bool "interactive"
+ select CPU_FREQ_GOV_INTERACTIVE
+ help
+ Use the CPUFreq governor 'interactive' as default. This allows
+ you to get a full dynamic cpu frequency capable system by simply
+ loading your cpufreq low-level hardware driver, using the
+ 'interactive' governor for latency-sensitive workloads.
+
+config CPU_FREQ_DEFAULT_GOV_SCHED
+ bool "sched"
+ select CPU_FREQ_GOV_SCHED
+ help
+ Use the CPUfreq governor 'sched' as default. This scales
+ cpu frequency using CPU utilization estimates from the
+ scheduler.
+
endchoice
config CPU_FREQ_GOV_PERFORMANCE
@@ -159,6 +177,20 @@ config CPU_FREQ_GOV_ONDEMAND
If in doubt, say N.
+config CPU_FREQ_GOV_INTERACTIVE
+ bool "'interactive' cpufreq policy governor"
+ help
+ 'interactive' - This driver adds a dynamic cpufreq policy governor
+ designed for latency-sensitive workloads.
+
+ This governor attempts to reduce the latency of clock
+ increases so that the system is more responsive to
+ interactive workloads.
+
+ For details, take a look at linux/Documentation/cpu-freq.
+
+ If in doubt, say N.
+
config CPU_FREQ_GOV_CONSERVATIVE
tristate "'conservative' cpufreq governor"
depends on CPU_FREQ
@@ -183,6 +215,19 @@ config CPU_FREQ_GOV_CONSERVATIVE
If in doubt, say N.
+config CPU_FREQ_GOV_SCHED
+ bool "'sched' cpufreq governor"
+ depends on CPU_FREQ
+ depends on SMP
+ select CPU_FREQ_GOV_COMMON
+ help
+ 'sched' - this governor scales cpu frequency from the
+ scheduler as a function of cpu capacity utilization. It does
+ not evaluate utilization on a periodic basis (as ondemand
+ does) but instead is event-driven by the scheduler.
+
+ If in doubt, say N.
+
comment "CPU frequency scaling drivers"
config CPUFREQ_DT
diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
index c0af1a1281c8..b02ae1463a15 100644
--- a/drivers/cpufreq/Makefile
+++ b/drivers/cpufreq/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_CPU_FREQ_GOV_POWERSAVE) += cpufreq_powersave.o
obj-$(CONFIG_CPU_FREQ_GOV_USERSPACE) += cpufreq_userspace.o
obj-$(CONFIG_CPU_FREQ_GOV_ONDEMAND) += cpufreq_ondemand.o
obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE) += cpufreq_conservative.o
+obj-$(CONFIG_CPU_FREQ_GOV_INTERACTIVE) += cpufreq_interactive.o
obj-$(CONFIG_CPU_FREQ_GOV_COMMON) += cpufreq_governor.o
obj-$(CONFIG_CPUFREQ_DT) += cpufreq-dt.o
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 8412ce5f93a7..7b728143440d 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -29,6 +29,9 @@
#include <linux/suspend.h>
#include <linux/syscore_ops.h>
#include <linux/tick.h>
+#ifdef CONFIG_SMP
+#include <linux/sched.h>
+#endif
#include <trace/events/power.h>
static LIST_HEAD(cpufreq_policy_list);
@@ -154,6 +157,12 @@ bool have_governor_per_policy(void)
}
EXPORT_SYMBOL_GPL(have_governor_per_policy);
+bool cpufreq_driver_is_slow(void)
+{
+ return !(cpufreq_driver->flags & CPUFREQ_DRIVER_FAST);
+}
+EXPORT_SYMBOL_GPL(cpufreq_driver_is_slow);
+
struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy)
{
if (have_governor_per_policy())
@@ -347,6 +356,50 @@ static void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
#endif
}
+/*********************************************************************
+ * FREQUENCY INVARIANT CPU CAPACITY *
+ *********************************************************************/
+
+static DEFINE_PER_CPU(unsigned long, freq_scale) = SCHED_CAPACITY_SCALE;
+static DEFINE_PER_CPU(unsigned long, max_freq_scale) = SCHED_CAPACITY_SCALE;
+
+static void
+scale_freq_capacity(struct cpufreq_policy *policy, struct cpufreq_freqs *freqs)
+{
+ unsigned long cur = freqs ? freqs->new : policy->cur;
+ unsigned long scale = (cur << SCHED_CAPACITY_SHIFT) / policy->max;
+ struct cpufreq_cpuinfo *cpuinfo = &policy->cpuinfo;
+ int cpu;
+
+ pr_debug("cpus %*pbl cur/cur max freq %lu/%u kHz freq scale %lu\n",
+ cpumask_pr_args(policy->cpus), cur, policy->max, scale);
+
+ for_each_cpu(cpu, policy->cpus)
+ per_cpu(freq_scale, cpu) = scale;
+
+ if (freqs)
+ return;
+
+ scale = (policy->max << SCHED_CAPACITY_SHIFT) / cpuinfo->max_freq;
+
+ pr_debug("cpus %*pbl cur max/max freq %u/%u kHz max freq scale %lu\n",
+ cpumask_pr_args(policy->cpus), policy->max, cpuinfo->max_freq,
+ scale);
+
+ for_each_cpu(cpu, policy->cpus)
+ per_cpu(max_freq_scale, cpu) = scale;
+}
+
+unsigned long cpufreq_scale_freq_capacity(struct sched_domain *sd, int cpu)
+{
+ return per_cpu(freq_scale, cpu);
+}
+
+unsigned long cpufreq_scale_max_freq_capacity(int cpu)
+{
+ return per_cpu(max_freq_scale, cpu);
+}
+
static void __cpufreq_notify_transition(struct cpufreq_policy *policy,
struct cpufreq_freqs *freqs, unsigned int state)
{
@@ -423,6 +476,9 @@ static void cpufreq_notify_post_transition(struct cpufreq_policy *policy,
void cpufreq_freq_transition_begin(struct cpufreq_policy *policy,
struct cpufreq_freqs *freqs)
{
+#ifdef CONFIG_SMP
+ int cpu;
+#endif
/*
* Catch double invocations of _begin() which lead to self-deadlock.
@@ -450,6 +506,12 @@ wait:
spin_unlock(&policy->transition_lock);
+ scale_freq_capacity(policy, freqs);
+#ifdef CONFIG_SMP
+ for_each_cpu(cpu, policy->cpus)
+ trace_cpu_capacity(capacity_curr_of(cpu), cpu);
+#endif
+
cpufreq_notify_transition(policy, freqs, CPUFREQ_PRECHANGE);
}
EXPORT_SYMBOL_GPL(cpufreq_freq_transition_begin);
@@ -2126,8 +2188,11 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_NOTIFY, new_policy);
+ scale_freq_capacity(new_policy, NULL);
+
policy->min = new_policy->min;
policy->max = new_policy->max;
+ trace_cpu_frequency_limits(policy->max, policy->min, policy->cpu);
pr_debug("new min and max freqs are %u - %u kHz\n",
policy->min, policy->max);
diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c
new file mode 100644
index 000000000000..f2929e628820
--- /dev/null
+++ b/drivers/cpufreq/cpufreq_interactive.c
@@ -0,0 +1,1367 @@
+/*
+ * drivers/cpufreq/cpufreq_interactive.c
+ *
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * Author: Mike Chan (mike@android.com)
+ *
+ */
+
+#include <linux/cpu.h>
+#include <linux/cpumask.h>
+#include <linux/cpufreq.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/rwsem.h>
+#include <linux/sched.h>
+#include <linux/sched/rt.h>
+#include <linux/tick.h>
+#include <linux/time.h>
+#include <linux/timer.h>
+#include <linux/workqueue.h>
+#include <linux/kthread.h>
+#include <linux/slab.h>
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/cpufreq_interactive.h>
+
+struct cpufreq_interactive_cpuinfo {
+ struct timer_list cpu_timer;
+ struct timer_list cpu_slack_timer;
+ spinlock_t load_lock; /* protects the next 4 fields */
+ u64 time_in_idle;
+ u64 time_in_idle_timestamp;
+ u64 cputime_speedadj;
+ u64 cputime_speedadj_timestamp;
+ struct cpufreq_policy *policy;
+ struct cpufreq_frequency_table *freq_table;
+ spinlock_t target_freq_lock; /*protects target freq */
+ unsigned int target_freq;
+ unsigned int floor_freq;
+ u64 pol_floor_val_time; /* policy floor_validate_time */
+ u64 loc_floor_val_time; /* per-cpu floor_validate_time */
+ u64 pol_hispeed_val_time; /* policy hispeed_validate_time */
+ u64 loc_hispeed_val_time; /* per-cpu hispeed_validate_time */
+ struct rw_semaphore enable_sem;
+ int governor_enabled;
+};
+
+static DEFINE_PER_CPU(struct cpufreq_interactive_cpuinfo, cpuinfo);
+
+/* realtime thread handles frequency scaling */
+static struct task_struct *speedchange_task;
+static cpumask_t speedchange_cpumask;
+static spinlock_t speedchange_cpumask_lock;
+static struct mutex gov_lock;
+
+/* Target load. Lower values result in higher CPU speeds. */
+#define DEFAULT_TARGET_LOAD 90
+static unsigned int default_target_loads[] = {DEFAULT_TARGET_LOAD};
+
+#define DEFAULT_TIMER_RATE (20 * USEC_PER_MSEC)
+#define DEFAULT_ABOVE_HISPEED_DELAY DEFAULT_TIMER_RATE
+static unsigned int default_above_hispeed_delay[] = {
+ DEFAULT_ABOVE_HISPEED_DELAY };
+
+struct cpufreq_interactive_tunables {
+ int usage_count;
+ /* Hi speed to bump to from lo speed when load burst (default max) */
+ unsigned int hispeed_freq;
+ /* Go to hi speed when CPU load at or above this value. */
+#define DEFAULT_GO_HISPEED_LOAD 99
+ unsigned long go_hispeed_load;
+ /* Target load. Lower values result in higher CPU speeds. */
+ spinlock_t target_loads_lock;
+ unsigned int *target_loads;
+ int ntarget_loads;
+ /*
+ * The minimum amount of time to spend at a frequency before we can ramp
+ * down.
+ */
+#define DEFAULT_MIN_SAMPLE_TIME (80 * USEC_PER_MSEC)
+ unsigned long min_sample_time;
+ /*
+ * The sample rate of the timer used to increase frequency
+ */
+ unsigned long timer_rate;
+ /*
+ * Wait this long before raising speed above hispeed, by default a
+ * single timer interval.
+ */
+ spinlock_t above_hispeed_delay_lock;
+ unsigned int *above_hispeed_delay;
+ int nabove_hispeed_delay;
+ /* Non-zero means indefinite speed boost active */
+ int boost_val;
+ /* Duration of a boot pulse in usecs */
+ int boostpulse_duration_val;
+ /* End time of boost pulse in ktime converted to usecs */
+ u64 boostpulse_endtime;
+ bool boosted;
+ /*
+ * Max additional time to wait in idle, beyond timer_rate, at speeds
+ * above minimum before wakeup to reduce speed, or -1 if unnecessary.
+ */
+#define DEFAULT_TIMER_SLACK (4 * DEFAULT_TIMER_RATE)
+ int timer_slack_val;
+ bool io_is_busy;
+};
+
+/* For cases where we have single governor instance for system */
+static struct cpufreq_interactive_tunables *common_tunables;
+
+static struct attribute_group *get_sysfs_attr(void);
+
+static void cpufreq_interactive_timer_resched(
+ struct cpufreq_interactive_cpuinfo *pcpu)
+{
+ struct cpufreq_interactive_tunables *tunables =
+ pcpu->policy->governor_data;
+ unsigned long expires;
+ unsigned long flags;
+
+ spin_lock_irqsave(&pcpu->load_lock, flags);
+ pcpu->time_in_idle =
+ get_cpu_idle_time(smp_processor_id(),
+ &pcpu->time_in_idle_timestamp,
+ tunables->io_is_busy);
+ pcpu->cputime_speedadj = 0;
+ pcpu->cputime_speedadj_timestamp = pcpu->time_in_idle_timestamp;
+ expires = jiffies + usecs_to_jiffies(tunables->timer_rate);
+ mod_timer_pinned(&pcpu->cpu_timer, expires);
+
+ if (tunables->timer_slack_val >= 0 &&
+ pcpu->target_freq > pcpu->policy->min) {
+ expires += usecs_to_jiffies(tunables->timer_slack_val);
+ mod_timer_pinned(&pcpu->cpu_slack_timer, expires);
+ }
+
+ spin_unlock_irqrestore(&pcpu->load_lock, flags);
+}
+
+/* The caller shall take enable_sem write semaphore to avoid any timer race.
+ * The cpu_timer and cpu_slack_timer must be deactivated when calling this
+ * function.
+ */
+static void cpufreq_interactive_timer_start(
+ struct cpufreq_interactive_tunables *tunables, int cpu)
+{
+ struct cpufreq_interactive_cpuinfo *pcpu = &per_cpu(cpuinfo, cpu);
+ unsigned long expires = jiffies +
+ usecs_to_jiffies(tunables->timer_rate);
+ unsigned long flags;
+
+ pcpu->cpu_timer.expires = expires;
+ add_timer_on(&pcpu->cpu_timer, cpu);
+ if (tunables->timer_slack_val >= 0 &&
+ pcpu->target_freq > pcpu->policy->min) {
+ expires += usecs_to_jiffies(tunables->timer_slack_val);
+ pcpu->cpu_slack_timer.expires = expires;
+ add_timer_on(&pcpu->cpu_slack_timer, cpu);
+ }
+
+ spin_lock_irqsave(&pcpu->load_lock, flags);
+ pcpu->time_in_idle =
+ get_cpu_idle_time(cpu, &pcpu->time_in_idle_timestamp,
+ tunables->io_is_busy);
+ pcpu->cputime_speedadj = 0;
+ pcpu->cputime_speedadj_timestamp = pcpu->time_in_idle_timestamp;
+ spin_unlock_irqrestore(&pcpu->load_lock, flags);
+}
+
+static unsigned int freq_to_above_hispeed_delay(
+ struct cpufreq_interactive_tunables *tunables,
+ unsigned int freq)
+{
+ int i;
+ unsigned int ret;
+ unsigned long flags;
+
+ spin_lock_irqsave(&tunables->above_hispeed_delay_lock, flags);
+
+ for (i = 0; i < tunables->nabove_hispeed_delay - 1 &&
+ freq >= tunables->above_hispeed_delay[i+1]; i += 2)
+ ;
+
+ ret = tunables->above_hispeed_delay[i];
+ spin_unlock_irqrestore(&tunables->above_hispeed_delay_lock, flags);
+ return ret;
+}
+
+static unsigned int freq_to_targetload(
+ struct cpufreq_interactive_tunables *tunables, unsigned int freq)
+{
+ int i;
+ unsigned int ret;
+ unsigned long flags;
+
+ spin_lock_irqsave(&tunables->target_loads_lock, flags);
+
+ for (i = 0; i < tunables->ntarget_loads - 1 &&
+ freq >= tunables->target_loads[i+1]; i += 2)
+ ;
+
+ ret = tunables->target_loads[i];
+ spin_unlock_irqrestore(&tunables->target_loads_lock, flags);
+ return ret;
+}
+
+/*
+ * If increasing frequencies never map to a lower target load then
+ * choose_freq() will find the minimum frequency that does not exceed its
+ * target load given the current load.
+ */
+static unsigned int choose_freq(struct cpufreq_interactive_cpuinfo *pcpu,
+ unsigned int loadadjfreq)
+{
+ unsigned int freq = pcpu->policy->cur;
+ unsigned int prevfreq, freqmin, freqmax;
+ unsigned int tl;
+ int index;
+
+ freqmin = 0;
+ freqmax = UINT_MAX;
+
+ do {
+ prevfreq = freq;
+ tl = freq_to_targetload(pcpu->policy->governor_data, freq);
+
+ /*
+ * Find the lowest frequency where the computed load is less
+ * than or equal to the target load.
+ */
+
+ if (cpufreq_frequency_table_target(
+ pcpu->policy, pcpu->freq_table, loadadjfreq / tl,
+ CPUFREQ_RELATION_L, &index))
+ break;
+ freq = pcpu->freq_table[index].frequency;
+
+ if (freq > prevfreq) {
+ /* The previous frequency is too low. */
+ freqmin = prevfreq;
+
+ if (freq >= freqmax) {
+ /*
+ * Find the highest frequency that is less
+ * than freqmax.
+ */
+ if (cpufreq_frequency_table_target(
+ pcpu->policy, pcpu->freq_table,
+ freqmax - 1, CPUFREQ_RELATION_H,
+ &index))
+ break;
+ freq = pcpu->freq_table[index].frequency;
+
+ if (freq == freqmin) {
+ /*
+ * The first frequency below freqmax
+ * has already been found to be too
+ * low. freqmax is the lowest speed
+ * we found that is fast enough.
+ */
+ freq = freqmax;
+ break;
+ }
+ }
+ } else if (freq < prevfreq) {
+ /* The previous frequency is high enough. */
+ freqmax = prevfreq;
+
+ if (freq <= freqmin) {
+ /*
+ * Find the lowest frequency that is higher
+ * than freqmin.
+ */
+ if (cpufreq_frequency_table_target(
+ pcpu->policy, pcpu->freq_table,
+ freqmin + 1, CPUFREQ_RELATION_L,
+ &index))
+ break;
+ freq = pcpu->freq_table[index].frequency;
+
+ /*
+ * If freqmax is the first frequency above
+ * freqmin then we have already found that
+ * this speed is fast enough.
+ */
+ if (freq == freqmax)
+ break;
+ }
+ }
+
+ /* If same frequency chosen as previous then done. */
+ } while (freq != prevfreq);
+
+ return freq;
+}
+
+static u64 update_load(int cpu)
+{
+ struct cpufreq_interactive_cpuinfo *pcpu = &per_cpu(cpuinfo, cpu);
+ struct cpufreq_interactive_tunables *tunables =
+ pcpu->policy->governor_data;
+ u64 now;
+ u64 now_idle;
+ unsigned int delta_idle;
+ unsigned int delta_time;
+ u64 active_time;
+
+ now_idle = get_cpu_idle_time(cpu, &now, tunables->io_is_busy);
+ delta_idle = (unsigned int)(now_idle - pcpu->time_in_idle);
+ delta_time = (unsigned int)(now - pcpu->time_in_idle_timestamp);
+
+ if (delta_time <= delta_idle)
+ active_time = 0;
+ else
+ active_time = delta_time - delta_idle;
+
+ pcpu->cputime_speedadj += active_time * pcpu->policy->cur;
+
+ pcpu->time_in_idle = now_idle;
+ pcpu->time_in_idle_timestamp = now;
+ return now;
+}
+
+static void cpufreq_interactive_timer(unsigned long data)
+{
+ u64 now;
+ unsigned int delta_time;
+ u64 cputime_speedadj;
+ int cpu_load;
+ struct cpufreq_interactive_cpuinfo *pcpu =
+ &per_cpu(cpuinfo, data);
+ struct cpufreq_interactive_tunables *tunables =
+ pcpu->policy->governor_data;
+ unsigned int new_freq;
+ unsigned int loadadjfreq;
+ unsigned int index;
+ unsigned long flags;
+ u64 max_fvtime;
+
+ if (!down_read_trylock(&pcpu->enable_sem))
+ return;
+ if (!pcpu->governor_enabled)
+ goto exit;
+
+ spin_lock_irqsave(&pcpu->load_lock, flags);
+ now = update_load(data);
+ delta_time = (unsigned int)(now - pcpu->cputime_speedadj_timestamp);
+ cputime_speedadj = pcpu->cputime_speedadj;
+ spin_unlock_irqrestore(&pcpu->load_lock, flags);
+
+ if (WARN_ON_ONCE(!delta_time))
+ goto rearm;
+
+ spin_lock_irqsave(&pcpu->target_freq_lock, flags);
+ do_div(cputime_speedadj, delta_time);
+ loadadjfreq = (unsigned int)cputime_speedadj * 100;
+ cpu_load = loadadjfreq / pcpu->policy->cur;
+ tunables->boosted = tunables->boost_val || now < tunables->boostpulse_endtime;
+
+ if (cpu_load >= tunables->go_hispeed_load || tunables->boosted) {
+ if (pcpu->policy->cur < tunables->hispeed_freq) {
+ new_freq = tunables->hispeed_freq;
+ } else {
+ new_freq = choose_freq(pcpu, loadadjfreq);
+
+ if (new_freq < tunables->hispeed_freq)
+ new_freq = tunables->hispeed_freq;
+ }
+ } else {
+ new_freq = choose_freq(pcpu, loadadjfreq);
+ if (new_freq > tunables->hispeed_freq &&
+ pcpu->policy->cur < tunables->hispeed_freq)
+ new_freq = tunables->hispeed_freq;
+ }
+
+ if (pcpu->policy->cur >= tunables->hispeed_freq &&
+ new_freq > pcpu->policy->cur &&
+ now - pcpu->pol_hispeed_val_time <
+ freq_to_above_hispeed_delay(tunables, pcpu->policy->cur)) {
+ trace_cpufreq_interactive_notyet(
+ data, cpu_load, pcpu->target_freq,
+ pcpu->policy->cur, new_freq);
+ spin_unlock_irqrestore(&pcpu->target_freq_lock, flags);
+ goto rearm;
+ }
+
+ pcpu->loc_hispeed_val_time = now;
+
+ if (cpufreq_frequency_table_target(pcpu->policy, pcpu->freq_table,
+ new_freq, CPUFREQ_RELATION_L,
+ &index)) {
+ spin_unlock_irqrestore(&pcpu->target_freq_lock, flags);
+ goto rearm;
+ }
+
+ new_freq = pcpu->freq_table[index].frequency;
+
+ /*
+ * Do not scale below floor_freq unless we have been at or above the
+ * floor frequency for the minimum sample time since last validated.
+ */
+ max_fvtime = max(pcpu->pol_floor_val_time, pcpu->loc_floor_val_time);
+ if (new_freq < pcpu->floor_freq &&
+ pcpu->target_freq >= pcpu->policy->cur) {
+ if (now - max_fvtime < tunables->min_sample_time) {
+ trace_cpufreq_interactive_notyet(
+ data, cpu_load, pcpu->target_freq,
+ pcpu->policy->cur, new_freq);
+ spin_unlock_irqrestore(&pcpu->target_freq_lock, flags);
+ goto rearm;
+ }
+ }
+
+ /*
+ * Update the timestamp for checking whether speed has been held at
+ * or above the selected frequency for a minimum of min_sample_time,
+ * if not boosted to hispeed_freq. If boosted to hispeed_freq then we
+ * allow the speed to drop as soon as the boostpulse duration expires
+ * (or the indefinite boost is turned off).
+ */
+
+ if (!tunables->boosted || new_freq > tunables->hispeed_freq) {
+ pcpu->floor_freq = new_freq;
+ if (pcpu->target_freq >= pcpu->policy->cur ||
+ new_freq >= pcpu->policy->cur)
+ pcpu->loc_floor_val_time = now;
+ }
+
+ if (pcpu->target_freq == new_freq &&
+ pcpu->target_freq <= pcpu->policy->cur) {
+ trace_cpufreq_interactive_already(
+ data, cpu_load, pcpu->target_freq,
+ pcpu->policy->cur, new_freq);
+ spin_unlock_irqrestore(&pcpu->target_freq_lock, flags);
+ goto rearm;
+ }
+
+ trace_cpufreq_interactive_target(data, cpu_load, pcpu->target_freq,
+ pcpu->policy->cur, new_freq);
+
+ pcpu->target_freq = new_freq;
+ spin_unlock_irqrestore(&pcpu->target_freq_lock, flags);
+ spin_lock_irqsave(&speedchange_cpumask_lock, flags);
+ cpumask_set_cpu(data, &speedchange_cpumask);
+ spin_unlock_irqrestore(&speedchange_cpumask_lock, flags);
+ wake_up_process(speedchange_task);
+
+rearm:
+ if (!timer_pending(&pcpu->cpu_timer))
+ cpufreq_interactive_timer_resched(pcpu);
+
+exit:
+ up_read(&pcpu->enable_sem);
+ return;
+}
+
+static void cpufreq_interactive_idle_end(void)
+{
+ struct cpufreq_interactive_cpuinfo *pcpu =
+ &per_cpu(cpuinfo, smp_processor_id());
+
+ if (!down_read_trylock(&pcpu->enable_sem))
+ return;
+ if (!pcpu->governor_enabled) {
+ up_read(&pcpu->enable_sem);
+ return;
+ }
+
+ /* Arm the timer for 1-2 ticks later if not already. */
+ if (!timer_pending(&pcpu->cpu_timer)) {
+ cpufreq_interactive_timer_resched(pcpu);
+ } else if (time_after_eq(jiffies, pcpu->cpu_timer.expires)) {
+ del_timer(&pcpu->cpu_timer);
+ del_timer(&pcpu->cpu_slack_timer);
+ cpufreq_interactive_timer(smp_processor_id());
+ }
+
+ up_read(&pcpu->enable_sem);
+}
+
+static void cpufreq_interactive_get_policy_info(struct cpufreq_policy *policy,
+ unsigned int *pmax_freq,
+ u64 *phvt, u64 *pfvt)
+{
+ struct cpufreq_interactive_cpuinfo *pcpu;
+ unsigned int max_freq = 0;
+ u64 hvt = ~0ULL, fvt = 0;
+ unsigned int i;
+
+ for_each_cpu(i, policy->cpus) {
+ pcpu = &per_cpu(cpuinfo, i);
+
+ fvt = max(fvt, pcpu->loc_floor_val_time);
+ if (pcpu->target_freq > max_freq) {
+ max_freq = pcpu->target_freq;
+ hvt = pcpu->loc_hispeed_val_time;
+ } else if (pcpu->target_freq == max_freq) {
+ hvt = min(hvt, pcpu->loc_hispeed_val_time);
+ }
+ }
+
+ *pmax_freq = max_freq;
+ *phvt = hvt;
+ *pfvt = fvt;
+}
+
+static void cpufreq_interactive_adjust_cpu(unsigned int cpu,
+ struct cpufreq_policy *policy)
+{
+ struct cpufreq_interactive_cpuinfo *pcpu;
+ u64 hvt, fvt;
+ unsigned int max_freq;
+ int i;
+
+ cpufreq_interactive_get_policy_info(policy, &max_freq, &hvt, &fvt);
+
+ for_each_cpu(i, policy->cpus) {
+ pcpu = &per_cpu(cpuinfo, i);
+ pcpu->pol_floor_val_time = fvt;
+ }
+
+ if (max_freq != policy->cur) {
+ __cpufreq_driver_target(policy, max_freq, CPUFREQ_RELATION_H);
+ for_each_cpu(i, policy->cpus) {
+ pcpu = &per_cpu(cpuinfo, i);
+ pcpu->pol_hispeed_val_time = hvt;
+ }
+ }
+
+ trace_cpufreq_interactive_setspeed(cpu, max_freq, policy->cur);
+}
+
+static int cpufreq_interactive_speedchange_task(void *data)
+{
+ unsigned int cpu;
+ cpumask_t tmp_mask;
+ unsigned long flags;
+ struct cpufreq_interactive_cpuinfo *pcpu;
+
+ while (1) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_lock_irqsave(&speedchange_cpumask_lock, flags);
+
+ if (cpumask_empty(&speedchange_cpumask)) {
+ spin_unlock_irqrestore(&speedchange_cpumask_lock,
+ flags);
+ schedule();
+
+ if (kthread_should_stop())
+ break;
+
+ spin_lock_irqsave(&speedchange_cpumask_lock, flags);
+ }
+
+ set_current_state(TASK_RUNNING);
+ tmp_mask = speedchange_cpumask;
+ cpumask_clear(&speedchange_cpumask);
+ spin_unlock_irqrestore(&speedchange_cpumask_lock, flags);
+
+ for_each_cpu(cpu, &tmp_mask) {
+ pcpu = &per_cpu(cpuinfo, cpu);
+
+ down_write(&pcpu->policy->rwsem);
+
+ if (likely(down_read_trylock(&pcpu->enable_sem))) {
+ if (likely(pcpu->governor_enabled))
+ cpufreq_interactive_adjust_cpu(cpu,
+ pcpu->policy);
+ up_read(&pcpu->enable_sem);
+ }
+
+ up_write(&pcpu->policy->rwsem);
+ }
+ }
+
+ return 0;
+}
+
+static void cpufreq_interactive_boost(struct cpufreq_interactive_tunables *tunables)
+{
+ int i;
+ int anyboost = 0;
+ unsigned long flags[2];
+ struct cpufreq_interactive_cpuinfo *pcpu;
+
+ tunables->boosted = true;
+
+ spin_lock_irqsave(&speedchange_cpumask_lock, flags[0]);
+
+ for_each_online_cpu(i) {
+ pcpu = &per_cpu(cpuinfo, i);
+
+ if (!down_read_trylock(&pcpu->enable_sem))
+ continue;
+
+ if (!pcpu->governor_enabled) {
+ up_read(&pcpu->enable_sem);
+ continue;
+ }
+
+ if (tunables != pcpu->policy->governor_data) {
+ up_read(&pcpu->enable_sem);
+ continue;
+ }
+
+ spin_lock_irqsave(&pcpu->target_freq_lock, flags[1]);
+ if (pcpu->target_freq < tunables->hispeed_freq) {
+ pcpu->target_freq = tunables->hispeed_freq;
+ cpumask_set_cpu(i, &speedchange_cpumask);
+ pcpu->pol_hispeed_val_time =
+ ktime_to_us(ktime_get());
+ anyboost = 1;
+ }
+ spin_unlock_irqrestore(&pcpu->target_freq_lock, flags[1]);
+
+ up_read(&pcpu->enable_sem);
+ }
+
+ spin_unlock_irqrestore(&speedchange_cpumask_lock, flags[0]);
+
+ if (anyboost)
+ wake_up_process(speedchange_task);
+}
+
+static int cpufreq_interactive_notifier(
+ struct notifier_block *nb, unsigned long val, void *data)
+{
+ struct cpufreq_freqs *freq = data;
+ struct cpufreq_interactive_cpuinfo *pcpu;
+ int cpu;
+ unsigned long flags;
+
+ if (val == CPUFREQ_POSTCHANGE) {
+ pcpu = &per_cpu(cpuinfo, freq->cpu);
+ if (!down_read_trylock(&pcpu->enable_sem))
+ return 0;
+ if (!pcpu->governor_enabled) {
+ up_read(&pcpu->enable_sem);
+ return 0;
+ }
+
+ for_each_cpu(cpu, pcpu->policy->cpus) {
+ struct cpufreq_interactive_cpuinfo *pjcpu =
+ &per_cpu(cpuinfo, cpu);
+ if (cpu != freq->cpu) {
+ if (!down_read_trylock(&pjcpu->enable_sem))
+ continue;
+ if (!pjcpu->governor_enabled) {
+ up_read(&pjcpu->enable_sem);
+ continue;
+ }
+ }
+ spin_lock_irqsave(&pjcpu->load_lock, flags);
+ update_load(cpu);
+ spin_unlock_irqrestore(&pjcpu->load_lock, flags);
+ if (cpu != freq->cpu)
+ up_read(&pjcpu->enable_sem);
+ }
+
+ up_read(&pcpu->enable_sem);
+ }
+ return 0;
+}
+
+static struct notifier_block cpufreq_notifier_block = {
+ .notifier_call = cpufreq_interactive_notifier,
+};
+
+static unsigned int *get_tokenized_data(const char *buf, int *num_tokens)
+{
+ const char *cp;
+ int i;
+ int ntokens = 1;
+ unsigned int *tokenized_data;
+ int err = -EINVAL;
+
+ cp = buf;
+ while ((cp = strpbrk(cp + 1, " :")))
+ ntokens++;
+
+ if (!(ntokens & 0x1))
+ goto err;
+
+ tokenized_data = kmalloc(ntokens * sizeof(unsigned int), GFP_KERNEL);
+ if (!tokenized_data) {
+ err = -ENOMEM;
+ goto err;
+ }
+
+ cp = buf;
+ i = 0;
+ while (i < ntokens) {
+ if (sscanf(cp, "%u", &tokenized_data[i++]) != 1)
+ goto err_kfree;
+
+ cp = strpbrk(cp, " :");
+ if (!cp)
+ break;
+ cp++;
+ }
+
+ if (i != ntokens)
+ goto err_kfree;
+
+ *num_tokens = ntokens;
+ return tokenized_data;
+
+err_kfree:
+ kfree(tokenized_data);
+err:
+ return ERR_PTR(err);
+}
+
+static ssize_t show_target_loads(
+ struct cpufreq_interactive_tunables *tunables,
+ char *buf)
+{
+ int i;
+ ssize_t ret = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&tunables->target_loads_lock, flags);
+
+ for (i = 0; i < tunables->ntarget_loads; i++)
+ ret += sprintf(buf + ret, "%u%s", tunables->target_loads[i],
+ i & 0x1 ? ":" : " ");
+
+ sprintf(buf + ret - 1, "\n");
+ spin_unlock_irqrestore(&tunables->target_loads_lock, flags);
+ return ret;
+}
+
+static ssize_t store_target_loads(
+ struct cpufreq_interactive_tunables *tunables,
+ const char *buf, size_t count)
+{
+ int ntokens;
+ unsigned int *new_target_loads = NULL;
+ unsigned long flags;
+
+ new_target_loads = get_tokenized_data(buf, &ntokens);
+ if (IS_ERR(new_target_loads))
+ return PTR_RET(new_target_loads);
+
+ spin_lock_irqsave(&tunables->target_loads_lock, flags);
+ if (tunables->target_loads != default_target_loads)
+ kfree(tunables->target_loads);
+ tunables->target_loads = new_target_loads;
+ tunables->ntarget_loads = ntokens;
+ spin_unlock_irqrestore(&tunables->target_loads_lock, flags);
+ return count;
+}
+
+static ssize_t show_above_hispeed_delay(
+ struct cpufreq_interactive_tunables *tunables, char *buf)
+{
+ int i;
+ ssize_t ret = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&tunables->above_hispeed_delay_lock, flags);
+
+ for (i = 0; i < tunables->nabove_hispeed_delay; i++)
+ ret += sprintf(buf + ret, "%u%s",
+ tunables->above_hispeed_delay[i],
+ i & 0x1 ? ":" : " ");
+
+ sprintf(buf + ret - 1, "\n");
+ spin_unlock_irqrestore(&tunables->above_hispeed_delay_lock, flags);
+ return ret;
+}
+
+static ssize_t store_above_hispeed_delay(
+ struct cpufreq_interactive_tunables *tunables,
+ const char *buf, size_t count)
+{
+ int ntokens;
+ unsigned int *new_above_hispeed_delay = NULL;
+ unsigned long flags;
+
+ new_above_hispeed_delay = get_tokenized_data(buf, &ntokens);
+ if (IS_ERR(new_above_hispeed_delay))
+ return PTR_RET(new_above_hispeed_delay);
+
+ spin_lock_irqsave(&tunables->above_hispeed_delay_lock, flags);
+ if (tunables->above_hispeed_delay != default_above_hispeed_delay)
+ kfree(tunables->above_hispeed_delay);
+ tunables->above_hispeed_delay = new_above_hispeed_delay;
+ tunables->nabove_hispeed_delay = ntokens;
+ spin_unlock_irqrestore(&tunables->above_hispeed_delay_lock, flags);
+ return count;
+
+}
+
+static ssize_t show_hispeed_freq(struct cpufreq_interactive_tunables *tunables,
+ char *buf)
+{
+ return sprintf(buf, "%u\n", tunables->hispeed_freq);
+}
+
+static ssize_t store_hispeed_freq(struct cpufreq_interactive_tunables *tunables,
+ const char *buf, size_t count)
+{
+ int ret;
+ long unsigned int val;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret < 0)
+ return ret;
+ tunables->hispeed_freq = val;
+ return count;
+}
+
+static ssize_t show_go_hispeed_load(struct cpufreq_interactive_tunables
+ *tunables, char *buf)
+{
+ return sprintf(buf, "%lu\n", tunables->go_hispeed_load);
+}
+
+static ssize_t store_go_hispeed_load(struct cpufreq_interactive_tunables
+ *tunables, const char *buf, size_t count)
+{
+ int ret;
+ unsigned long val;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret < 0)
+ return ret;
+ tunables->go_hispeed_load = val;
+ return count;
+}
+
+static ssize_t show_min_sample_time(struct cpufreq_interactive_tunables
+ *tunables, char *buf)
+{
+ return sprintf(buf, "%lu\n", tunables->min_sample_time);
+}
+
+static ssize_t store_min_sample_time(struct cpufreq_interactive_tunables
+ *tunables, const char *buf, size_t count)
+{
+ int ret;
+ unsigned long val;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret < 0)
+ return ret;
+ tunables->min_sample_time = val;
+ return count;
+}
+
+static ssize_t show_timer_rate(struct cpufreq_interactive_tunables *tunables,
+ char *buf)
+{
+ return sprintf(buf, "%lu\n", tunables->timer_rate);
+}
+
+static ssize_t store_timer_rate(struct cpufreq_interactive_tunables *tunables,
+ const char *buf, size_t count)
+{
+ int ret;
+ unsigned long val, val_round;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret < 0)
+ return ret;
+
+ val_round = jiffies_to_usecs(usecs_to_jiffies(val));
+ if (val != val_round)
+ pr_warn("timer_rate not aligned to jiffy. Rounded up to %lu\n",
+ val_round);
+
+ tunables->timer_rate = val_round;
+ return count;
+}
+
+static ssize_t show_timer_slack(struct cpufreq_interactive_tunables *tunables,
+ char *buf)
+{
+ return sprintf(buf, "%d\n", tunables->timer_slack_val);
+}
+
+static ssize_t store_timer_slack(struct cpufreq_interactive_tunables *tunables,
+ const char *buf, size_t count)
+{
+ int ret;
+ unsigned long val;
+
+ ret = kstrtol(buf, 10, &val);
+ if (ret < 0)
+ return ret;
+
+ tunables->timer_slack_val = val;
+ return count;
+}
+
+static ssize_t show_boost(struct cpufreq_interactive_tunables *tunables,
+ char *buf)
+{
+ return sprintf(buf, "%d\n", tunables->boost_val);
+}
+
+static ssize_t store_boost(struct cpufreq_interactive_tunables *tunables,
+ const char *buf, size_t count)
+{
+ int ret;
+ unsigned long val;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret < 0)
+ return ret;
+
+ tunables->boost_val = val;
+
+ if (tunables->boost_val) {
+ trace_cpufreq_interactive_boost("on");
+ if (!tunables->boosted)
+ cpufreq_interactive_boost(tunables);
+ } else {
+ tunables->boostpulse_endtime = ktime_to_us(ktime_get());
+ trace_cpufreq_interactive_unboost("off");
+ }
+
+ return count;
+}
+
+static ssize_t store_boostpulse(struct cpufreq_interactive_tunables *tunables,
+ const char *buf, size_t count)
+{
+ int ret;
+ unsigned long val;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret < 0)
+ return ret;
+
+ tunables->boostpulse_endtime = ktime_to_us(ktime_get()) +
+ tunables->boostpulse_duration_val;
+ trace_cpufreq_interactive_boost("pulse");
+ if (!tunables->boosted)
+ cpufreq_interactive_boost(tunables);
+ return count;
+}
+
+static ssize_t show_boostpulse_duration(struct cpufreq_interactive_tunables
+ *tunables, char *buf)
+{
+ return sprintf(buf, "%d\n", tunables->boostpulse_duration_val);
+}
+
+static ssize_t store_boostpulse_duration(struct cpufreq_interactive_tunables
+ *tunables, const char *buf, size_t count)
+{
+ int ret;
+ unsigned long val;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret < 0)
+ return ret;
+
+ tunables->boostpulse_duration_val = val;
+ return count;
+}
+
+static ssize_t show_io_is_busy(struct cpufreq_interactive_tunables *tunables,
+ char *buf)
+{
+ return sprintf(buf, "%u\n", tunables->io_is_busy);
+}
+
+static ssize_t store_io_is_busy(struct cpufreq_interactive_tunables *tunables,
+ const char *buf, size_t count)
+{
+ int ret;
+ unsigned long val;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret < 0)
+ return ret;
+ tunables->io_is_busy = val;
+ return count;
+}
+
+/*
+ * Create show/store routines
+ * - sys: One governor instance for complete SYSTEM
+ * - pol: One governor instance per struct cpufreq_policy
+ */
+#define show_gov_pol_sys(file_name) \
+static ssize_t show_##file_name##_gov_sys \
+(struct kobject *kobj, struct attribute *attr, char *buf) \
+{ \
+ return show_##file_name(common_tunables, buf); \
+} \
+ \
+static ssize_t show_##file_name##_gov_pol \
+(struct cpufreq_policy *policy, char *buf) \
+{ \
+ return show_##file_name(policy->governor_data, buf); \
+}
+
+#define store_gov_pol_sys(file_name) \
+static ssize_t store_##file_name##_gov_sys \
+(struct kobject *kobj, struct attribute *attr, const char *buf, \
+ size_t count) \
+{ \
+ return store_##file_name(common_tunables, buf, count); \
+} \
+ \
+static ssize_t store_##file_name##_gov_pol \
+(struct cpufreq_policy *policy, const char *buf, size_t count) \
+{ \
+ return store_##file_name(policy->governor_data, buf, count); \
+}
+
+#define show_store_gov_pol_sys(file_name) \
+show_gov_pol_sys(file_name); \
+store_gov_pol_sys(file_name)
+
+show_store_gov_pol_sys(target_loads);
+show_store_gov_pol_sys(above_hispeed_delay);
+show_store_gov_pol_sys(hispeed_freq);
+show_store_gov_pol_sys(go_hispeed_load);
+show_store_gov_pol_sys(min_sample_time);
+show_store_gov_pol_sys(timer_rate);
+show_store_gov_pol_sys(timer_slack);
+show_store_gov_pol_sys(boost);
+store_gov_pol_sys(boostpulse);
+show_store_gov_pol_sys(boostpulse_duration);
+show_store_gov_pol_sys(io_is_busy);
+
+#define gov_sys_attr_rw(_name) \
+static struct global_attr _name##_gov_sys = \
+__ATTR(_name, 0644, show_##_name##_gov_sys, store_##_name##_gov_sys)
+
+#define gov_pol_attr_rw(_name) \
+static struct freq_attr _name##_gov_pol = \
+__ATTR(_name, 0644, show_##_name##_gov_pol, store_##_name##_gov_pol)
+
+#define gov_sys_pol_attr_rw(_name) \
+ gov_sys_attr_rw(_name); \
+ gov_pol_attr_rw(_name)
+
+gov_sys_pol_attr_rw(target_loads);
+gov_sys_pol_attr_rw(above_hispeed_delay);
+gov_sys_pol_attr_rw(hispeed_freq);
+gov_sys_pol_attr_rw(go_hispeed_load);
+gov_sys_pol_attr_rw(min_sample_time);
+gov_sys_pol_attr_rw(timer_rate);
+gov_sys_pol_attr_rw(timer_slack);
+gov_sys_pol_attr_rw(boost);
+gov_sys_pol_attr_rw(boostpulse_duration);
+gov_sys_pol_attr_rw(io_is_busy);
+
+static struct global_attr boostpulse_gov_sys =
+ __ATTR(boostpulse, 0200, NULL, store_boostpulse_gov_sys);
+
+static struct freq_attr boostpulse_gov_pol =
+ __ATTR(boostpulse, 0200, NULL, store_boostpulse_gov_pol);
+
+/* One Governor instance for entire system */
+static struct attribute *interactive_attributes_gov_sys[] = {
+ &target_loads_gov_sys.attr,
+ &above_hispeed_delay_gov_sys.attr,
+ &hispeed_freq_gov_sys.attr,
+ &go_hispeed_load_gov_sys.attr,
+ &min_sample_time_gov_sys.attr,
+ &timer_rate_gov_sys.attr,
+ &timer_slack_gov_sys.attr,
+ &boost_gov_sys.attr,
+ &boostpulse_gov_sys.attr,
+ &boostpulse_duration_gov_sys.attr,
+ &io_is_busy_gov_sys.attr,
+ NULL,
+};
+
+static struct attribute_group interactive_attr_group_gov_sys = {
+ .attrs = interactive_attributes_gov_sys,
+ .name = "interactive",
+};
+
+/* Per policy governor instance */
+static struct attribute *interactive_attributes_gov_pol[] = {
+ &target_loads_gov_pol.attr,
+ &above_hispeed_delay_gov_pol.attr,
+ &hispeed_freq_gov_pol.attr,
+ &go_hispeed_load_gov_pol.attr,
+ &min_sample_time_gov_pol.attr,
+ &timer_rate_gov_pol.attr,
+ &timer_slack_gov_pol.attr,
+ &boost_gov_pol.attr,
+ &boostpulse_gov_pol.attr,
+ &boostpulse_duration_gov_pol.attr,
+ &io_is_busy_gov_pol.attr,
+ NULL,
+};
+
+static struct attribute_group interactive_attr_group_gov_pol = {
+ .attrs = interactive_attributes_gov_pol,
+ .name = "interactive",
+};
+
+static struct attribute_group *get_sysfs_attr(void)
+{
+ if (have_governor_per_policy())
+ return &interactive_attr_group_gov_pol;
+ else
+ return &interactive_attr_group_gov_sys;
+}
+
+static int cpufreq_interactive_idle_notifier(struct notifier_block *nb,
+ unsigned long val,
+ void *data)
+{
+ if (val == IDLE_END)
+ cpufreq_interactive_idle_end();
+
+ return 0;
+}
+
+static struct notifier_block cpufreq_interactive_idle_nb = {
+ .notifier_call = cpufreq_interactive_idle_notifier,
+};
+
+static int cpufreq_governor_interactive(struct cpufreq_policy *policy,
+ unsigned int event)
+{
+ int rc;
+ unsigned int j;
+ struct cpufreq_interactive_cpuinfo *pcpu;
+ struct cpufreq_frequency_table *freq_table;
+ struct cpufreq_interactive_tunables *tunables;
+ unsigned long flags;
+
+ if (have_governor_per_policy())
+ tunables = policy->governor_data;
+ else
+ tunables = common_tunables;
+
+ WARN_ON(!tunables && (event != CPUFREQ_GOV_POLICY_INIT));
+
+ switch (event) {
+ case CPUFREQ_GOV_POLICY_INIT:
+ if (have_governor_per_policy()) {
+ WARN_ON(tunables);
+ } else if (tunables) {
+ tunables->usage_count++;
+ policy->governor_data = tunables;
+ return 0;
+ }
+
+ tunables = kzalloc(sizeof(*tunables), GFP_KERNEL);
+ if (!tunables) {
+ pr_err("%s: POLICY_INIT: kzalloc failed\n", __func__);
+ return -ENOMEM;
+ }
+
+ tunables->usage_count = 1;
+ tunables->above_hispeed_delay = default_above_hispeed_delay;
+ tunables->nabove_hispeed_delay =
+ ARRAY_SIZE(default_above_hispeed_delay);
+ tunables->go_hispeed_load = DEFAULT_GO_HISPEED_LOAD;
+ tunables->target_loads = default_target_loads;
+ tunables->ntarget_loads = ARRAY_SIZE(default_target_loads);
+ tunables->min_sample_time = DEFAULT_MIN_SAMPLE_TIME;
+ tunables->timer_rate = DEFAULT_TIMER_RATE;
+ tunables->boostpulse_duration_val = DEFAULT_MIN_SAMPLE_TIME;
+ tunables->timer_slack_val = DEFAULT_TIMER_SLACK;
+
+ spin_lock_init(&tunables->target_loads_lock);
+ spin_lock_init(&tunables->above_hispeed_delay_lock);
+
+ policy->governor_data = tunables;
+ if (!have_governor_per_policy()) {
+ common_tunables = tunables;
+ }
+
+ rc = sysfs_create_group(get_governor_parent_kobj(policy),
+ get_sysfs_attr());
+ if (rc) {
+ kfree(tunables);
+ policy->governor_data = NULL;
+ if (!have_governor_per_policy()) {
+ common_tunables = NULL;
+ }
+ return rc;
+ }
+
+ if (!policy->governor->initialized) {
+ idle_notifier_register(&cpufreq_interactive_idle_nb);
+ cpufreq_register_notifier(&cpufreq_notifier_block,
+ CPUFREQ_TRANSITION_NOTIFIER);
+ }
+
+ break;
+
+ case CPUFREQ_GOV_POLICY_EXIT:
+ if (!--tunables->usage_count) {
+ if (policy->governor->initialized == 1) {
+ cpufreq_unregister_notifier(&cpufreq_notifier_block,
+ CPUFREQ_TRANSITION_NOTIFIER);
+ idle_notifier_unregister(&cpufreq_interactive_idle_nb);
+ }
+
+ sysfs_remove_group(get_governor_parent_kobj(policy),
+ get_sysfs_attr());
+
+ kfree(tunables);
+ common_tunables = NULL;
+ }
+
+ policy->governor_data = NULL;
+ break;
+
+ case CPUFREQ_GOV_START:
+ mutex_lock(&gov_lock);
+
+ freq_table = cpufreq_frequency_get_table(policy->cpu);
+ if (!tunables->hispeed_freq)
+ tunables->hispeed_freq = policy->max;
+
+ for_each_cpu(j, policy->cpus) {
+ pcpu = &per_cpu(cpuinfo, j);
+ pcpu->policy = policy;
+ pcpu->target_freq = policy->cur;
+ pcpu->freq_table = freq_table;
+ pcpu->floor_freq = pcpu->target_freq;
+ pcpu->pol_floor_val_time =
+ ktime_to_us(ktime_get());
+ pcpu->loc_floor_val_time = pcpu->pol_floor_val_time;
+ pcpu->pol_hispeed_val_time = pcpu->pol_floor_val_time;
+ pcpu->loc_hispeed_val_time = pcpu->pol_floor_val_time;
+ down_write(&pcpu->enable_sem);
+ del_timer_sync(&pcpu->cpu_timer);
+ del_timer_sync(&pcpu->cpu_slack_timer);
+ cpufreq_interactive_timer_start(tunables, j);
+ pcpu->governor_enabled = 1;
+ up_write(&pcpu->enable_sem);
+ }
+
+ mutex_unlock(&gov_lock);
+ break;
+
+ case CPUFREQ_GOV_STOP:
+ mutex_lock(&gov_lock);
+ for_each_cpu(j, policy->cpus) {
+ pcpu = &per_cpu(cpuinfo, j);
+ down_write(&pcpu->enable_sem);
+ pcpu->governor_enabled = 0;
+ del_timer_sync(&pcpu->cpu_timer);
+ del_timer_sync(&pcpu->cpu_slack_timer);
+ up_write(&pcpu->enable_sem);
+ }
+
+ mutex_unlock(&gov_lock);
+ break;
+
+ case CPUFREQ_GOV_LIMITS:
+ if (policy->max < policy->cur)
+ __cpufreq_driver_target(policy,
+ policy->max, CPUFREQ_RELATION_H);
+ else if (policy->min > policy->cur)
+ __cpufreq_driver_target(policy,
+ policy->min, CPUFREQ_RELATION_L);
+ for_each_cpu(j, policy->cpus) {
+ pcpu = &per_cpu(cpuinfo, j);
+
+ down_read(&pcpu->enable_sem);
+ if (pcpu->governor_enabled == 0) {
+ up_read(&pcpu->enable_sem);
+ continue;
+ }
+
+ spin_lock_irqsave(&pcpu->target_freq_lock, flags);
+ if (policy->max < pcpu->target_freq)
+ pcpu->target_freq = policy->max;
+ else if (policy->min > pcpu->target_freq)
+ pcpu->target_freq = policy->min;
+
+ spin_unlock_irqrestore(&pcpu->target_freq_lock, flags);
+ up_read(&pcpu->enable_sem);
+ }
+ break;
+ }
+ return 0;
+}
+
+#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_INTERACTIVE
+static
+#endif
+struct cpufreq_governor cpufreq_gov_interactive = {
+ .name = "interactive",
+ .governor = cpufreq_governor_interactive,
+ .max_transition_latency = 10000000,
+ .owner = THIS_MODULE,
+};
+
+static void cpufreq_interactive_nop_timer(unsigned long data)
+{
+}
+
+static int __init cpufreq_interactive_init(void)
+{
+ unsigned int i;
+ struct cpufreq_interactive_cpuinfo *pcpu;
+ struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
+
+ /* Initalize per-cpu timers */
+ for_each_possible_cpu(i) {
+ pcpu = &per_cpu(cpuinfo, i);
+ init_timer_deferrable(&pcpu->cpu_timer);
+ pcpu->cpu_timer.function = cpufreq_interactive_timer;
+ pcpu->cpu_timer.data = i;
+ init_timer(&pcpu->cpu_slack_timer);
+ pcpu->cpu_slack_timer.function = cpufreq_interactive_nop_timer;
+ spin_lock_init(&pcpu->load_lock);
+ spin_lock_init(&pcpu->target_freq_lock);
+ init_rwsem(&pcpu->enable_sem);
+ }
+
+ spin_lock_init(&speedchange_cpumask_lock);
+ mutex_init(&gov_lock);
+ speedchange_task =
+ kthread_create(cpufreq_interactive_speedchange_task, NULL,
+ "cfinteractive");
+ if (IS_ERR(speedchange_task))
+ return PTR_ERR(speedchange_task);
+
+ sched_setscheduler_nocheck(speedchange_task, SCHED_FIFO, &param);
+ get_task_struct(speedchange_task);
+
+ /* NB: wake up so the thread does not look hung to the freezer */
+ wake_up_process(speedchange_task);
+
+ return cpufreq_register_governor(&cpufreq_gov_interactive);
+}
+
+#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_INTERACTIVE
+fs_initcall(cpufreq_interactive_init);
+#else
+module_init(cpufreq_interactive_init);
+#endif
+
+static void __exit cpufreq_interactive_exit(void)
+{
+ cpufreq_unregister_governor(&cpufreq_gov_interactive);
+ kthread_stop(speedchange_task);
+ put_task_struct(speedchange_task);
+}
+
+module_exit(cpufreq_interactive_exit);
+
+MODULE_AUTHOR("Mike Chan <mike@android.com>");
+MODULE_DESCRIPTION("'cpufreq_interactive' - A cpufreq governor for "
+ "Latency sensitive workloads");
+MODULE_LICENSE("GPL");
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index d40b2c077746..151971627757 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -192,7 +192,7 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
}
/* Take note of the planned idle state. */
- sched_idle_set_state(target_state);
+ sched_idle_set_state(target_state, index);
trace_cpu_idle_rcuidle(index, dev->cpu);
time_start = ktime_get();
@@ -205,7 +205,7 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, dev->cpu);
/* The cpu is no longer idle or about to enter idle. */
- sched_idle_set_state(NULL);
+ sched_idle_set_state(NULL, -1);
if (broadcast) {
if (WARN_ON_ONCE(!irqs_disabled()))
diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c
index 22e4463d1787..0846b39b4ca6 100644
--- a/drivers/cpuidle/governors/menu.c
+++ b/drivers/cpuidle/governors/menu.c
@@ -178,7 +178,12 @@ static inline int performance_multiplier(unsigned long nr_iowaiters, unsigned lo
/* for higher loadavg, we are more reluctant */
- mult += 2 * get_loadavg(load);
+ /*
+ * this doesn't work as intended - it is almost always 0, but can
+ * sometimes, depending on workload, spike very high into the hundreds
+ * even when the average cpu load is under 10%.
+ */
+ /* mult += 2 * get_loadavg(); */
/* for IO wait tasks (per cpu!) we add 5x each */
mult += 10 * nr_iowaiters;
diff --git a/drivers/dma-buf/fence.c b/drivers/dma-buf/fence.c
index 7b05dbe9b296..0ed73ad1b876 100644
--- a/drivers/dma-buf/fence.c
+++ b/drivers/dma-buf/fence.c
@@ -304,8 +304,12 @@ fence_remove_callback(struct fence *fence, struct fence_cb *cb)
spin_lock_irqsave(fence->lock, flags);
ret = !list_empty(&cb->node);
- if (ret)
+ if (ret) {
list_del_init(&cb->node);
+ if (list_empty(&fence->cb_list))
+ if (fence->ops->disable_signaling)
+ fence->ops->disable_signaling(fence);
+ }
spin_unlock_irqrestore(fence->lock, flags);
diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
index ec379a4164cc..f292917b00e7 100644
--- a/drivers/firmware/efi/Makefile
+++ b/drivers/firmware/efi/Makefile
@@ -18,3 +18,6 @@ obj-$(CONFIG_EFI_RUNTIME_MAP) += runtime-map.o
obj-$(CONFIG_EFI_RUNTIME_WRAPPERS) += runtime-wrappers.o
obj-$(CONFIG_EFI_STUB) += libstub/
obj-$(CONFIG_EFI_FAKE_MEMMAP) += fake_mem.o
+
+arm-obj-$(CONFIG_EFI) := arm-init.o arm-runtime.o
+obj-$(CONFIG_ARM64) += $(arm-obj-y)
diff --git a/drivers/firmware/efi/arm-init.c b/drivers/firmware/efi/arm-init.c
new file mode 100644
index 000000000000..a76c35fc0b92
--- /dev/null
+++ b/drivers/firmware/efi/arm-init.c
@@ -0,0 +1,221 @@
+/*
+ * Extensible Firmware Interface
+ *
+ * Based on Extensible Firmware Interface Specification version 2.4
+ *
+ * Copyright (C) 2013 - 2015 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/efi.h>
+#include <linux/init.h>
+#include <linux/memblock.h>
+#include <linux/mm_types.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+
+#include <asm/efi.h>
+
+struct efi_memory_map memmap;
+
+u64 efi_system_table;
+
+static int __init is_normal_ram(efi_memory_desc_t *md)
+{
+ if (md->attribute & EFI_MEMORY_WB)
+ return 1;
+ return 0;
+}
+
+/*
+ * Translate a EFI virtual address into a physical address: this is necessary,
+ * as some data members of the EFI system table are virtually remapped after
+ * SetVirtualAddressMap() has been called.
+ */
+static phys_addr_t efi_to_phys(unsigned long addr)
+{
+ efi_memory_desc_t *md;
+
+ for_each_efi_memory_desc(&memmap, md) {
+ if (!(md->attribute & EFI_MEMORY_RUNTIME))
+ continue;
+ if (md->virt_addr == 0)
+ /* no virtual mapping has been installed by the stub */
+ break;
+ if (md->virt_addr <= addr &&
+ (addr - md->virt_addr) < (md->num_pages << EFI_PAGE_SHIFT))
+ return md->phys_addr + addr - md->virt_addr;
+ }
+ return addr;
+}
+
+static int __init uefi_init(void)
+{
+ efi_char16_t *c16;
+ void *config_tables;
+ size_t table_size;
+ char vendor[100] = "unknown";
+ int i, retval;
+
+ efi.systab = early_memremap(efi_system_table,
+ sizeof(efi_system_table_t));
+ if (efi.systab == NULL) {
+ pr_warn("Unable to map EFI system table.\n");
+ return -ENOMEM;
+ }
+
+ set_bit(EFI_BOOT, &efi.flags);
+ if (IS_ENABLED(CONFIG_64BIT))
+ set_bit(EFI_64BIT, &efi.flags);
+
+ /*
+ * Verify the EFI Table
+ */
+ if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) {
+ pr_err("System table signature incorrect\n");
+ retval = -EINVAL;
+ goto out;
+ }
+ if ((efi.systab->hdr.revision >> 16) < 2)
+ pr_warn("Warning: EFI system table version %d.%02d, expected 2.00 or greater\n",
+ efi.systab->hdr.revision >> 16,
+ efi.systab->hdr.revision & 0xffff);
+
+ /* Show what we know for posterity */
+ c16 = early_memremap(efi_to_phys(efi.systab->fw_vendor),
+ sizeof(vendor) * sizeof(efi_char16_t));
+ if (c16) {
+ for (i = 0; i < (int) sizeof(vendor) - 1 && *c16; ++i)
+ vendor[i] = c16[i];
+ vendor[i] = '\0';
+ early_memunmap(c16, sizeof(vendor) * sizeof(efi_char16_t));
+ }
+
+ pr_info("EFI v%u.%.02u by %s\n",
+ efi.systab->hdr.revision >> 16,
+ efi.systab->hdr.revision & 0xffff, vendor);
+
+ table_size = sizeof(efi_config_table_64_t) * efi.systab->nr_tables;
+ config_tables = early_memremap(efi_to_phys(efi.systab->tables),
+ table_size);
+ if (config_tables == NULL) {
+ pr_warn("Unable to map EFI config table array.\n");
+ retval = -ENOMEM;
+ goto out;
+ }
+ retval = efi_config_parse_tables(config_tables, efi.systab->nr_tables,
+ sizeof(efi_config_table_t), NULL);
+
+ early_memunmap(config_tables, table_size);
+out:
+ early_memunmap(efi.systab, sizeof(efi_system_table_t));
+ return retval;
+}
+
+/*
+ * Return true for RAM regions we want to permanently reserve.
+ */
+static __init int is_reserve_region(efi_memory_desc_t *md)
+{
+ switch (md->type) {
+ case EFI_LOADER_CODE:
+ case EFI_LOADER_DATA:
+ case EFI_BOOT_SERVICES_CODE:
+ case EFI_BOOT_SERVICES_DATA:
+ case EFI_CONVENTIONAL_MEMORY:
+ case EFI_PERSISTENT_MEMORY:
+ return 0;
+ default:
+ break;
+ }
+ return is_normal_ram(md);
+}
+
+static __init void reserve_regions(void)
+{
+ efi_memory_desc_t *md;
+ u64 paddr, npages, size;
+
+ if (efi_enabled(EFI_DBG))
+ pr_info("Processing EFI memory map:\n");
+
+ for_each_efi_memory_desc(&memmap, md) {
+ paddr = md->phys_addr;
+ npages = md->num_pages;
+
+ if (efi_enabled(EFI_DBG)) {
+ char buf[64];
+
+ pr_info(" 0x%012llx-0x%012llx %s",
+ paddr, paddr + (npages << EFI_PAGE_SHIFT) - 1,
+ efi_md_typeattr_format(buf, sizeof(buf), md));
+ }
+
+ memrange_efi_to_native(&paddr, &npages);
+ size = npages << PAGE_SHIFT;
+
+ if (is_normal_ram(md))
+ early_init_dt_add_memory_arch(paddr, size);
+
+ if (is_reserve_region(md)) {
+ memblock_mark_nomap(paddr, size);
+ if (efi_enabled(EFI_DBG))
+ pr_cont("*");
+ }
+
+ if (efi_enabled(EFI_DBG))
+ pr_cont("\n");
+ }
+
+ set_bit(EFI_MEMMAP, &efi.flags);
+}
+
+void __init efi_init(void)
+{
+ struct efi_fdt_params params;
+
+ /* Grab UEFI information placed in FDT by stub */
+ if (!efi_get_fdt_params(&params))
+ return;
+
+ efi_system_table = params.system_table;
+
+ memmap.phys_map = params.mmap;
+ memmap.map = early_memremap(params.mmap, params.mmap_size);
+ if (memmap.map == NULL) {
+ /*
+ * If we are booting via UEFI, the UEFI memory map is the only
+ * description of memory we have, so there is little point in
+ * proceeding if we cannot access it.
+ */
+ panic("Unable to map EFI memory map.\n");
+ }
+ memmap.map_end = memmap.map + params.mmap_size;
+ memmap.desc_size = params.desc_size;
+ memmap.desc_version = params.desc_ver;
+
+ if (uefi_init() < 0)
+ return;
+
+ reserve_regions();
+ early_memunmap(memmap.map, params.mmap_size);
+
+ if (IS_ENABLED(CONFIG_ARM)) {
+ /*
+ * ARM currently does not allow ioremap_cache() to be called on
+ * memory regions that are covered by struct page. So remove the
+ * UEFI memory map from the linear mapping.
+ */
+ memblock_mark_nomap(params.mmap & PAGE_MASK,
+ PAGE_ALIGN(params.mmap_size +
+ (params.mmap & ~PAGE_MASK)));
+ } else {
+ memblock_reserve(params.mmap & PAGE_MASK,
+ PAGE_ALIGN(params.mmap_size +
+ (params.mmap & ~PAGE_MASK)));
+ }
+}
diff --git a/drivers/firmware/efi/arm-runtime.c b/drivers/firmware/efi/arm-runtime.c
new file mode 100644
index 000000000000..6ae21e41a429
--- /dev/null
+++ b/drivers/firmware/efi/arm-runtime.c
@@ -0,0 +1,135 @@
+/*
+ * Extensible Firmware Interface
+ *
+ * Based on Extensible Firmware Interface Specification version 2.4
+ *
+ * Copyright (C) 2013, 2014 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/efi.h>
+#include <linux/io.h>
+#include <linux/memblock.h>
+#include <linux/mm_types.h>
+#include <linux/preempt.h>
+#include <linux/rbtree.h>
+#include <linux/rwsem.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#include <asm/cacheflush.h>
+#include <asm/efi.h>
+#include <asm/mmu.h>
+#include <asm/pgalloc.h>
+#include <asm/pgtable.h>
+
+extern u64 efi_system_table;
+
+static struct mm_struct efi_mm = {
+ .mm_rb = RB_ROOT,
+ .mm_users = ATOMIC_INIT(2),
+ .mm_count = ATOMIC_INIT(1),
+ .mmap_sem = __RWSEM_INITIALIZER(efi_mm.mmap_sem),
+ .page_table_lock = __SPIN_LOCK_UNLOCKED(efi_mm.page_table_lock),
+ .mmlist = LIST_HEAD_INIT(efi_mm.mmlist),
+};
+
+static bool __init efi_virtmap_init(void)
+{
+ efi_memory_desc_t *md;
+
+ efi_mm.pgd = pgd_alloc(&efi_mm);
+ init_new_context(NULL, &efi_mm);
+
+ for_each_efi_memory_desc(&memmap, md) {
+ phys_addr_t phys = md->phys_addr;
+ int ret;
+
+ if (!(md->attribute & EFI_MEMORY_RUNTIME))
+ continue;
+ if (md->virt_addr == 0)
+ return false;
+
+ ret = efi_create_mapping(&efi_mm, md);
+ if (!ret) {
+ pr_info(" EFI remap %pa => %p\n",
+ &phys, (void *)(unsigned long)md->virt_addr);
+ } else {
+ pr_warn(" EFI remap %pa: failed to create mapping (%d)\n",
+ &phys, ret);
+ return false;
+ }
+ }
+ return true;
+}
+
+/*
+ * Enable the UEFI Runtime Services if all prerequisites are in place, i.e.,
+ * non-early mapping of the UEFI system table and virtual mappings for all
+ * EFI_MEMORY_RUNTIME regions.
+ */
+static int __init arm_enable_runtime_services(void)
+{
+ u64 mapsize;
+
+ if (!efi_enabled(EFI_BOOT)) {
+ pr_info("EFI services will not be available.\n");
+ return 0;
+ }
+
+ if (efi_runtime_disabled()) {
+ pr_info("EFI runtime services will be disabled.\n");
+ return 0;
+ }
+
+ pr_info("Remapping and enabling EFI services.\n");
+
+ mapsize = memmap.map_end - memmap.map;
+ memmap.map = (__force void *)ioremap_cache(memmap.phys_map,
+ mapsize);
+ if (!memmap.map) {
+ pr_err("Failed to remap EFI memory map\n");
+ return -ENOMEM;
+ }
+ memmap.map_end = memmap.map + mapsize;
+ efi.memmap = &memmap;
+
+ efi.systab = (__force void *)ioremap_cache(efi_system_table,
+ sizeof(efi_system_table_t));
+ if (!efi.systab) {
+ pr_err("Failed to remap EFI System Table\n");
+ return -ENOMEM;
+ }
+ set_bit(EFI_SYSTEM_TABLES, &efi.flags);
+
+ if (!efi_virtmap_init()) {
+ pr_err("No UEFI virtual mapping was installed -- runtime services will not be available\n");
+ return -ENOMEM;
+ }
+
+ /* Set up runtime services function pointers */
+ efi_native_runtime_setup();
+ set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
+
+ efi.runtime_version = efi.systab->hdr.revision;
+
+ return 0;
+}
+early_initcall(arm_enable_runtime_services);
+
+void efi_virtmap_load(void)
+{
+ preempt_disable();
+ efi_set_pgd(&efi_mm);
+}
+
+void efi_virtmap_unload(void)
+{
+ efi_set_pgd(current->active_mm);
+ preempt_enable();
+}
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 3b52677f459a..c51f3b2fe3c0 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -25,6 +25,8 @@
#include <linux/io.h>
#include <linux/platform_device.h>
+#include <asm/early_ioremap.h>
+
struct efi __read_mostly efi = {
.mps = EFI_INVALID_TABLE_ADDR,
.acpi = EFI_INVALID_TABLE_ADDR,
diff --git a/drivers/hid/hid-sensor-hub.c b/drivers/hid/hid-sensor-hub.c
index 92870cdb52d9..8efaa88329aa 100644
--- a/drivers/hid/hid-sensor-hub.c
+++ b/drivers/hid/hid-sensor-hub.c
@@ -218,7 +218,8 @@ int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
goto done_proc;
}
- remaining_bytes = do_div(buffer_size, sizeof(__s32));
+ remaining_bytes = buffer_size % sizeof(__s32);
+ buffer_size = buffer_size / sizeof(__s32);
if (buffer_size) {
for (i = 0; i < buffer_size; ++i) {
hid_set_field(report->field[field_index], i,
diff --git a/drivers/input/Kconfig b/drivers/input/Kconfig
index a35532ec00e4..2557dcda7621 100644
--- a/drivers/input/Kconfig
+++ b/drivers/input/Kconfig
@@ -187,6 +187,19 @@ config INPUT_APMPOWER
To compile this driver as a module, choose M here: the
module will be called apm-power.
+config INPUT_KEYRESET
+ bool "Reset key"
+ depends on INPUT
+ select INPUT_KEYCOMBO
+ ---help---
+ Say Y here if you want to reboot when some keys are pressed;
+
+config INPUT_KEYCOMBO
+ bool "Key combo"
+ depends on INPUT
+ ---help---
+ Say Y here if you want to take action when some keys are pressed;
+
comment "Input Device Drivers"
source "drivers/input/keyboard/Kconfig"
diff --git a/drivers/input/Makefile b/drivers/input/Makefile
index 0c9302ca9954..2a6d05ab9170 100644
--- a/drivers/input/Makefile
+++ b/drivers/input/Makefile
@@ -26,3 +26,6 @@ obj-$(CONFIG_INPUT_TOUCHSCREEN) += touchscreen/
obj-$(CONFIG_INPUT_MISC) += misc/
obj-$(CONFIG_INPUT_APMPOWER) += apm-power.o
+obj-$(CONFIG_INPUT_KEYRESET) += keyreset.o
+obj-$(CONFIG_INPUT_KEYCOMBO) += keycombo.o
+
diff --git a/drivers/input/keyboard/goldfish_events.c b/drivers/input/keyboard/goldfish_events.c
index 907e4e278fce..c877e56a9bd5 100644
--- a/drivers/input/keyboard/goldfish_events.c
+++ b/drivers/input/keyboard/goldfish_events.c
@@ -17,11 +17,15 @@
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/input.h>
+#include <linux/input/mt.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/irq.h>
#include <linux/io.h>
+#include <linux/acpi.h>
+
+#define GOLDFISH_MAX_FINGERS 5
enum {
REG_READ = 0x00,
@@ -51,7 +55,21 @@ static irqreturn_t events_interrupt(int irq, void *dev_id)
value = __raw_readl(edev->addr + REG_READ);
input_event(edev->input, type, code, value);
- input_sync(edev->input);
+ // Send an extra (EV_SYN, SYN_REPORT, 0x0) event
+ // if a key was pressed. Some keyboard device
+ // drivers may only send the EV_KEY event and
+ // not EV_SYN.
+ // Note that sending an extra SYN_REPORT is not
+ // necessary nor correct protocol with other
+ // devices such as touchscreens, which will send
+ // their own SYN_REPORT's when sufficient event
+ // information has been collected (e.g., for
+ // touchscreens, when pressure and X/Y coordinates
+ // have been received). Hence, we will only send
+ // this extra SYN_REPORT if type == EV_KEY.
+ if (type == EV_KEY) {
+ input_sync(edev->input);
+ }
return IRQ_HANDLED;
}
@@ -153,6 +171,15 @@ static int events_probe(struct platform_device *pdev)
input_dev->name = edev->name;
input_dev->id.bustype = BUS_HOST;
+ // Set the Goldfish Device to be multi-touch.
+ // In the Ranchu kernel, there is multi-touch-specific
+ // code for handling ABS_MT_SLOT events.
+ // See drivers/input/input.c:input_handle_abs_event.
+ // If we do not issue input_mt_init_slots,
+ // the kernel will filter out needed ABS_MT_SLOT
+ // events when we touch the screen in more than one place,
+ // preventing multi-touch with more than one finger from working.
+ input_mt_init_slots(input_dev, GOLDFISH_MAX_FINGERS, 0);
events_import_bits(edev, input_dev->evbit, EV_SYN, EV_MAX);
events_import_bits(edev, input_dev->keybit, EV_KEY, KEY_MAX);
@@ -178,10 +205,26 @@ static int events_probe(struct platform_device *pdev)
return 0;
}
+static const struct of_device_id goldfish_events_of_match[] = {
+ { .compatible = "google,goldfish-events-keypad", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, goldfish_events_of_match);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id goldfish_events_acpi_match[] = {
+ { "GFSH0002", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, goldfish_events_acpi_match);
+#endif
+
static struct platform_driver events_driver = {
.probe = events_probe,
.driver = {
.name = "goldfish_events",
+ .of_match_table = goldfish_events_of_match,
+ .acpi_match_table = ACPI_PTR(goldfish_events_acpi_match),
},
};
diff --git a/drivers/input/keycombo.c b/drivers/input/keycombo.c
new file mode 100644
index 000000000000..2fba451b91d5
--- /dev/null
+++ b/drivers/input/keycombo.c
@@ -0,0 +1,261 @@
+/* drivers/input/keycombo.c
+ *
+ * Copyright (C) 2014 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/input.h>
+#include <linux/keycombo.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+struct keycombo_state {
+ struct input_handler input_handler;
+ unsigned long keybit[BITS_TO_LONGS(KEY_CNT)];
+ unsigned long upbit[BITS_TO_LONGS(KEY_CNT)];
+ unsigned long key[BITS_TO_LONGS(KEY_CNT)];
+ spinlock_t lock;
+ struct workqueue_struct *wq;
+ int key_down_target;
+ int key_down;
+ int key_up;
+ struct delayed_work key_down_work;
+ int delay;
+ struct work_struct key_up_work;
+ void (*key_up_fn)(void *);
+ void (*key_down_fn)(void *);
+ void *priv;
+ int key_is_down;
+ struct wakeup_source combo_held_wake_source;
+ struct wakeup_source combo_up_wake_source;
+};
+
+static void do_key_down(struct work_struct *work)
+{
+ struct delayed_work *dwork = container_of(work, struct delayed_work,
+ work);
+ struct keycombo_state *state = container_of(dwork,
+ struct keycombo_state, key_down_work);
+ if (state->key_down_fn)
+ state->key_down_fn(state->priv);
+}
+
+static void do_key_up(struct work_struct *work)
+{
+ struct keycombo_state *state = container_of(work, struct keycombo_state,
+ key_up_work);
+ if (state->key_up_fn)
+ state->key_up_fn(state->priv);
+ __pm_relax(&state->combo_up_wake_source);
+}
+
+static void keycombo_event(struct input_handle *handle, unsigned int type,
+ unsigned int code, int value)
+{
+ unsigned long flags;
+ struct keycombo_state *state = handle->private;
+
+ if (type != EV_KEY)
+ return;
+
+ if (code >= KEY_MAX)
+ return;
+
+ if (!test_bit(code, state->keybit))
+ return;
+
+ spin_lock_irqsave(&state->lock, flags);
+ if (!test_bit(code, state->key) == !value)
+ goto done;
+ __change_bit(code, state->key);
+ if (test_bit(code, state->upbit)) {
+ if (value)
+ state->key_up++;
+ else
+ state->key_up--;
+ } else {
+ if (value)
+ state->key_down++;
+ else
+ state->key_down--;
+ }
+ if (state->key_down == state->key_down_target && state->key_up == 0) {
+ __pm_stay_awake(&state->combo_held_wake_source);
+ state->key_is_down = 1;
+ if (queue_delayed_work(state->wq, &state->key_down_work,
+ state->delay))
+ pr_debug("Key down work already queued!");
+ } else if (state->key_is_down) {
+ if (!cancel_delayed_work(&state->key_down_work)) {
+ __pm_stay_awake(&state->combo_up_wake_source);
+ queue_work(state->wq, &state->key_up_work);
+ }
+ __pm_relax(&state->combo_held_wake_source);
+ state->key_is_down = 0;
+ }
+done:
+ spin_unlock_irqrestore(&state->lock, flags);
+}
+
+static int keycombo_connect(struct input_handler *handler,
+ struct input_dev *dev,
+ const struct input_device_id *id)
+{
+ int i;
+ int ret;
+ struct input_handle *handle;
+ struct keycombo_state *state =
+ container_of(handler, struct keycombo_state, input_handler);
+ for (i = 0; i < KEY_MAX; i++) {
+ if (test_bit(i, state->keybit) && test_bit(i, dev->keybit))
+ break;
+ }
+ if (i == KEY_MAX)
+ return -ENODEV;
+
+ handle = kzalloc(sizeof(*handle), GFP_KERNEL);
+ if (!handle)
+ return -ENOMEM;
+
+ handle->dev = dev;
+ handle->handler = handler;
+ handle->name = KEYCOMBO_NAME;
+ handle->private = state;
+
+ ret = input_register_handle(handle);
+ if (ret)
+ goto err_input_register_handle;
+
+ ret = input_open_device(handle);
+ if (ret)
+ goto err_input_open_device;
+
+ return 0;
+
+err_input_open_device:
+ input_unregister_handle(handle);
+err_input_register_handle:
+ kfree(handle);
+ return ret;
+}
+
+static void keycombo_disconnect(struct input_handle *handle)
+{
+ input_close_device(handle);
+ input_unregister_handle(handle);
+ kfree(handle);
+}
+
+static const struct input_device_id keycombo_ids[] = {
+ {
+ .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
+ .evbit = { BIT_MASK(EV_KEY) },
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(input, keycombo_ids);
+
+static int keycombo_probe(struct platform_device *pdev)
+{
+ int ret;
+ int key, *keyp;
+ struct keycombo_state *state;
+ struct keycombo_platform_data *pdata = pdev->dev.platform_data;
+
+ if (!pdata)
+ return -EINVAL;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return -ENOMEM;
+
+ spin_lock_init(&state->lock);
+ keyp = pdata->keys_down;
+ while ((key = *keyp++)) {
+ if (key >= KEY_MAX)
+ continue;
+ state->key_down_target++;
+ __set_bit(key, state->keybit);
+ }
+ if (pdata->keys_up) {
+ keyp = pdata->keys_up;
+ while ((key = *keyp++)) {
+ if (key >= KEY_MAX)
+ continue;
+ __set_bit(key, state->keybit);
+ __set_bit(key, state->upbit);
+ }
+ }
+
+ state->wq = alloc_ordered_workqueue("keycombo", 0);
+ if (!state->wq)
+ return -ENOMEM;
+
+ state->priv = pdata->priv;
+
+ if (pdata->key_down_fn)
+ state->key_down_fn = pdata->key_down_fn;
+ INIT_DELAYED_WORK(&state->key_down_work, do_key_down);
+
+ if (pdata->key_up_fn)
+ state->key_up_fn = pdata->key_up_fn;
+ INIT_WORK(&state->key_up_work, do_key_up);
+
+ wakeup_source_init(&state->combo_held_wake_source, "key combo");
+ wakeup_source_init(&state->combo_up_wake_source, "key combo up");
+ state->delay = msecs_to_jiffies(pdata->key_down_delay);
+
+ state->input_handler.event = keycombo_event;
+ state->input_handler.connect = keycombo_connect;
+ state->input_handler.disconnect = keycombo_disconnect;
+ state->input_handler.name = KEYCOMBO_NAME;
+ state->input_handler.id_table = keycombo_ids;
+ ret = input_register_handler(&state->input_handler);
+ if (ret) {
+ kfree(state);
+ return ret;
+ }
+ platform_set_drvdata(pdev, state);
+ return 0;
+}
+
+int keycombo_remove(struct platform_device *pdev)
+{
+ struct keycombo_state *state = platform_get_drvdata(pdev);
+ input_unregister_handler(&state->input_handler);
+ destroy_workqueue(state->wq);
+ kfree(state);
+ return 0;
+}
+
+
+struct platform_driver keycombo_driver = {
+ .driver.name = KEYCOMBO_NAME,
+ .probe = keycombo_probe,
+ .remove = keycombo_remove,
+};
+
+static int __init keycombo_init(void)
+{
+ return platform_driver_register(&keycombo_driver);
+}
+
+static void __exit keycombo_exit(void)
+{
+ return platform_driver_unregister(&keycombo_driver);
+}
+
+module_init(keycombo_init);
+module_exit(keycombo_exit);
diff --git a/drivers/input/keyreset.c b/drivers/input/keyreset.c
new file mode 100644
index 000000000000..7e5222aec7c1
--- /dev/null
+++ b/drivers/input/keyreset.c
@@ -0,0 +1,144 @@
+/* drivers/input/keyreset.c
+ *
+ * Copyright (C) 2014 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/input.h>
+#include <linux/keyreset.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/syscalls.h>
+#include <linux/keycombo.h>
+
+struct keyreset_state {
+ int restart_requested;
+ int (*reset_fn)(void);
+ struct platform_device *pdev_child;
+ struct work_struct restart_work;
+};
+
+static void do_restart(struct work_struct *unused)
+{
+ orderly_reboot();
+}
+
+static void do_reset_fn(void *priv)
+{
+ struct keyreset_state *state = priv;
+ if (state->restart_requested)
+ panic("keyboard reset failed, %d", state->restart_requested);
+ if (state->reset_fn) {
+ state->restart_requested = state->reset_fn();
+ } else {
+ pr_info("keyboard reset\n");
+ schedule_work(&state->restart_work);
+ state->restart_requested = 1;
+ }
+}
+
+static int keyreset_probe(struct platform_device *pdev)
+{
+ int ret = -ENOMEM;
+ struct keycombo_platform_data *pdata_child;
+ struct keyreset_platform_data *pdata = pdev->dev.platform_data;
+ int up_size = 0, down_size = 0, size;
+ int key, *keyp;
+ struct keyreset_state *state;
+
+ if (!pdata)
+ return -EINVAL;
+ state = devm_kzalloc(&pdev->dev, sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return -ENOMEM;
+
+ state->pdev_child = platform_device_alloc(KEYCOMBO_NAME,
+ PLATFORM_DEVID_AUTO);
+ if (!state->pdev_child)
+ return -ENOMEM;
+ state->pdev_child->dev.parent = &pdev->dev;
+ INIT_WORK(&state->restart_work, do_restart);
+
+ keyp = pdata->keys_down;
+ while ((key = *keyp++)) {
+ if (key >= KEY_MAX)
+ continue;
+ down_size++;
+ }
+ if (pdata->keys_up) {
+ keyp = pdata->keys_up;
+ while ((key = *keyp++)) {
+ if (key >= KEY_MAX)
+ continue;
+ up_size++;
+ }
+ }
+ size = sizeof(struct keycombo_platform_data)
+ + sizeof(int) * (down_size + 1);
+ pdata_child = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+ if (!pdata_child)
+ goto error;
+ memcpy(pdata_child->keys_down, pdata->keys_down,
+ sizeof(int) * down_size);
+ if (up_size > 0) {
+ pdata_child->keys_up = devm_kzalloc(&pdev->dev, up_size + 1,
+ GFP_KERNEL);
+ if (!pdata_child->keys_up)
+ goto error;
+ memcpy(pdata_child->keys_up, pdata->keys_up,
+ sizeof(int) * up_size);
+ if (!pdata_child->keys_up)
+ goto error;
+ }
+ state->reset_fn = pdata->reset_fn;
+ pdata_child->key_down_fn = do_reset_fn;
+ pdata_child->priv = state;
+ pdata_child->key_down_delay = pdata->key_down_delay;
+ ret = platform_device_add_data(state->pdev_child, pdata_child, size);
+ if (ret)
+ goto error;
+ platform_set_drvdata(pdev, state);
+ return platform_device_add(state->pdev_child);
+error:
+ platform_device_put(state->pdev_child);
+ return ret;
+}
+
+int keyreset_remove(struct platform_device *pdev)
+{
+ struct keyreset_state *state = platform_get_drvdata(pdev);
+ platform_device_put(state->pdev_child);
+ return 0;
+}
+
+
+struct platform_driver keyreset_driver = {
+ .driver.name = KEYRESET_NAME,
+ .probe = keyreset_probe,
+ .remove = keyreset_remove,
+};
+
+static int __init keyreset_init(void)
+{
+ return platform_driver_register(&keyreset_driver);
+}
+
+static void __exit keyreset_exit(void)
+{
+ return platform_driver_unregister(&keyreset_driver);
+}
+
+module_init(keyreset_init);
+module_exit(keyreset_exit);
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index d6d16fa78281..25ac47b9a180 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -341,6 +341,17 @@ config INPUT_ATI_REMOTE2
To compile this driver as a module, choose M here: the module will be
called ati_remote2.
+config INPUT_KEYCHORD
+ tristate "Key chord input driver support"
+ help
+ Say Y here if you want to enable the key chord driver
+ accessible at /dev/keychord. This driver can be used
+ for receiving notifications when client specified key
+ combinations are pressed.
+
+ To compile this driver as a module, choose M here: the
+ module will be called keychord.
+
config INPUT_KEYSPAN_REMOTE
tristate "Keyspan DMR USB remote control"
depends on USB_ARCH_HAS_HCD
@@ -509,6 +520,11 @@ config INPUT_SGI_BTNS
To compile this driver as a module, choose M here: the
module will be called sgi_btns.
+config INPUT_GPIO
+ tristate "GPIO driver support"
+ help
+ Say Y here if you want to support gpio based keys, wheels etc...
+
config HP_SDC_RTC
tristate "HP SDC Real Time Clock"
depends on (GSC || HP300) && SERIO
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 0357a088c6a9..66c3cc9f181c 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -34,9 +34,11 @@ obj-$(CONFIG_INPUT_DRV2667_HAPTICS) += drv2667.o
obj-$(CONFIG_INPUT_GP2A) += gp2ap002a00f.o
obj-$(CONFIG_INPUT_GPIO_BEEPER) += gpio-beeper.o
obj-$(CONFIG_INPUT_GPIO_TILT_POLLED) += gpio_tilt_polled.o
+obj-$(CONFIG_INPUT_GPIO) += gpio_event.o gpio_matrix.o gpio_input.o gpio_output.o gpio_axis.o
obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
obj-$(CONFIG_INPUT_IMS_PCU) += ims-pcu.o
obj-$(CONFIG_INPUT_IXP4XX_BEEPER) += ixp4xx-beeper.o
+obj-$(CONFIG_INPUT_KEYCHORD) += keychord.o
obj-$(CONFIG_INPUT_KEYSPAN_REMOTE) += keyspan_remote.o
obj-$(CONFIG_INPUT_KXTJ9) += kxtj9.o
obj-$(CONFIG_INPUT_M68K_BEEP) += m68kspkr.o
diff --git a/drivers/input/misc/gpio_axis.c b/drivers/input/misc/gpio_axis.c
new file mode 100644
index 000000000000..0acf4a576f53
--- /dev/null
+++ b/drivers/input/misc/gpio_axis.c
@@ -0,0 +1,192 @@
+/* drivers/input/misc/gpio_axis.c
+ *
+ * Copyright (C) 2007 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/gpio.h>
+#include <linux/gpio_event.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+
+struct gpio_axis_state {
+ struct gpio_event_input_devs *input_devs;
+ struct gpio_event_axis_info *info;
+ uint32_t pos;
+};
+
+uint16_t gpio_axis_4bit_gray_map_table[] = {
+ [0x0] = 0x0, [0x1] = 0x1, /* 0000 0001 */
+ [0x3] = 0x2, [0x2] = 0x3, /* 0011 0010 */
+ [0x6] = 0x4, [0x7] = 0x5, /* 0110 0111 */
+ [0x5] = 0x6, [0x4] = 0x7, /* 0101 0100 */
+ [0xc] = 0x8, [0xd] = 0x9, /* 1100 1101 */
+ [0xf] = 0xa, [0xe] = 0xb, /* 1111 1110 */
+ [0xa] = 0xc, [0xb] = 0xd, /* 1010 1011 */
+ [0x9] = 0xe, [0x8] = 0xf, /* 1001 1000 */
+};
+uint16_t gpio_axis_4bit_gray_map(struct gpio_event_axis_info *info, uint16_t in)
+{
+ return gpio_axis_4bit_gray_map_table[in];
+}
+
+uint16_t gpio_axis_5bit_singletrack_map_table[] = {
+ [0x10] = 0x00, [0x14] = 0x01, [0x1c] = 0x02, /* 10000 10100 11100 */
+ [0x1e] = 0x03, [0x1a] = 0x04, [0x18] = 0x05, /* 11110 11010 11000 */
+ [0x08] = 0x06, [0x0a] = 0x07, [0x0e] = 0x08, /* 01000 01010 01110 */
+ [0x0f] = 0x09, [0x0d] = 0x0a, [0x0c] = 0x0b, /* 01111 01101 01100 */
+ [0x04] = 0x0c, [0x05] = 0x0d, [0x07] = 0x0e, /* 00100 00101 00111 */
+ [0x17] = 0x0f, [0x16] = 0x10, [0x06] = 0x11, /* 10111 10110 00110 */
+ [0x02] = 0x12, [0x12] = 0x13, [0x13] = 0x14, /* 00010 10010 10011 */
+ [0x1b] = 0x15, [0x0b] = 0x16, [0x03] = 0x17, /* 11011 01011 00011 */
+ [0x01] = 0x18, [0x09] = 0x19, [0x19] = 0x1a, /* 00001 01001 11001 */
+ [0x1d] = 0x1b, [0x15] = 0x1c, [0x11] = 0x1d, /* 11101 10101 10001 */
+};
+uint16_t gpio_axis_5bit_singletrack_map(
+ struct gpio_event_axis_info *info, uint16_t in)
+{
+ return gpio_axis_5bit_singletrack_map_table[in];
+}
+
+static void gpio_event_update_axis(struct gpio_axis_state *as, int report)
+{
+ struct gpio_event_axis_info *ai = as->info;
+ int i;
+ int change;
+ uint16_t state = 0;
+ uint16_t pos;
+ uint16_t old_pos = as->pos;
+ for (i = ai->count - 1; i >= 0; i--)
+ state = (state << 1) | gpio_get_value(ai->gpio[i]);
+ pos = ai->map(ai, state);
+ if (ai->flags & GPIOEAF_PRINT_RAW)
+ pr_info("axis %d-%d raw %x, pos %d -> %d\n",
+ ai->type, ai->code, state, old_pos, pos);
+ if (report && pos != old_pos) {
+ if (ai->type == EV_REL) {
+ change = (ai->decoded_size + pos - old_pos) %
+ ai->decoded_size;
+ if (change > ai->decoded_size / 2)
+ change -= ai->decoded_size;
+ if (change == ai->decoded_size / 2) {
+ if (ai->flags & GPIOEAF_PRINT_EVENT)
+ pr_info("axis %d-%d unknown direction, "
+ "pos %d -> %d\n", ai->type,
+ ai->code, old_pos, pos);
+ change = 0; /* no closest direction */
+ }
+ if (ai->flags & GPIOEAF_PRINT_EVENT)
+ pr_info("axis %d-%d change %d\n",
+ ai->type, ai->code, change);
+ input_report_rel(as->input_devs->dev[ai->dev],
+ ai->code, change);
+ } else {
+ if (ai->flags & GPIOEAF_PRINT_EVENT)
+ pr_info("axis %d-%d now %d\n",
+ ai->type, ai->code, pos);
+ input_event(as->input_devs->dev[ai->dev],
+ ai->type, ai->code, pos);
+ }
+ input_sync(as->input_devs->dev[ai->dev]);
+ }
+ as->pos = pos;
+}
+
+static irqreturn_t gpio_axis_irq_handler(int irq, void *dev_id)
+{
+ struct gpio_axis_state *as = dev_id;
+ gpio_event_update_axis(as, 1);
+ return IRQ_HANDLED;
+}
+
+int gpio_event_axis_func(struct gpio_event_input_devs *input_devs,
+ struct gpio_event_info *info, void **data, int func)
+{
+ int ret;
+ int i;
+ int irq;
+ struct gpio_event_axis_info *ai;
+ struct gpio_axis_state *as;
+
+ ai = container_of(info, struct gpio_event_axis_info, info);
+ if (func == GPIO_EVENT_FUNC_SUSPEND) {
+ for (i = 0; i < ai->count; i++)
+ disable_irq(gpio_to_irq(ai->gpio[i]));
+ return 0;
+ }
+ if (func == GPIO_EVENT_FUNC_RESUME) {
+ for (i = 0; i < ai->count; i++)
+ enable_irq(gpio_to_irq(ai->gpio[i]));
+ return 0;
+ }
+
+ if (func == GPIO_EVENT_FUNC_INIT) {
+ *data = as = kmalloc(sizeof(*as), GFP_KERNEL);
+ if (as == NULL) {
+ ret = -ENOMEM;
+ goto err_alloc_axis_state_failed;
+ }
+ as->input_devs = input_devs;
+ as->info = ai;
+ if (ai->dev >= input_devs->count) {
+ pr_err("gpio_event_axis: bad device index %d >= %d "
+ "for %d:%d\n", ai->dev, input_devs->count,
+ ai->type, ai->code);
+ ret = -EINVAL;
+ goto err_bad_device_index;
+ }
+
+ input_set_capability(input_devs->dev[ai->dev],
+ ai->type, ai->code);
+ if (ai->type == EV_ABS) {
+ input_set_abs_params(input_devs->dev[ai->dev], ai->code,
+ 0, ai->decoded_size - 1, 0, 0);
+ }
+ for (i = 0; i < ai->count; i++) {
+ ret = gpio_request(ai->gpio[i], "gpio_event_axis");
+ if (ret < 0)
+ goto err_request_gpio_failed;
+ ret = gpio_direction_input(ai->gpio[i]);
+ if (ret < 0)
+ goto err_gpio_direction_input_failed;
+ ret = irq = gpio_to_irq(ai->gpio[i]);
+ if (ret < 0)
+ goto err_get_irq_num_failed;
+ ret = request_irq(irq, gpio_axis_irq_handler,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING,
+ "gpio_event_axis", as);
+ if (ret < 0)
+ goto err_request_irq_failed;
+ }
+ gpio_event_update_axis(as, 0);
+ return 0;
+ }
+
+ ret = 0;
+ as = *data;
+ for (i = ai->count - 1; i >= 0; i--) {
+ free_irq(gpio_to_irq(ai->gpio[i]), as);
+err_request_irq_failed:
+err_get_irq_num_failed:
+err_gpio_direction_input_failed:
+ gpio_free(ai->gpio[i]);
+err_request_gpio_failed:
+ ;
+ }
+err_bad_device_index:
+ kfree(as);
+ *data = NULL;
+err_alloc_axis_state_failed:
+ return ret;
+}
diff --git a/drivers/input/misc/gpio_event.c b/drivers/input/misc/gpio_event.c
new file mode 100644
index 000000000000..90f07eba3ce9
--- /dev/null
+++ b/drivers/input/misc/gpio_event.c
@@ -0,0 +1,228 @@
+/* drivers/input/misc/gpio_event.c
+ *
+ * Copyright (C) 2007 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/gpio_event.h>
+#include <linux/hrtimer.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+struct gpio_event {
+ struct gpio_event_input_devs *input_devs;
+ const struct gpio_event_platform_data *info;
+ void *state[0];
+};
+
+static int gpio_input_event(
+ struct input_dev *dev, unsigned int type, unsigned int code, int value)
+{
+ int i;
+ int devnr;
+ int ret = 0;
+ int tmp_ret;
+ struct gpio_event_info **ii;
+ struct gpio_event *ip = input_get_drvdata(dev);
+
+ for (devnr = 0; devnr < ip->input_devs->count; devnr++)
+ if (ip->input_devs->dev[devnr] == dev)
+ break;
+ if (devnr == ip->input_devs->count) {
+ pr_err("gpio_input_event: unknown device %p\n", dev);
+ return -EIO;
+ }
+
+ for (i = 0, ii = ip->info->info; i < ip->info->info_count; i++, ii++) {
+ if ((*ii)->event) {
+ tmp_ret = (*ii)->event(ip->input_devs, *ii,
+ &ip->state[i],
+ devnr, type, code, value);
+ if (tmp_ret)
+ ret = tmp_ret;
+ }
+ }
+ return ret;
+}
+
+static int gpio_event_call_all_func(struct gpio_event *ip, int func)
+{
+ int i;
+ int ret;
+ struct gpio_event_info **ii;
+
+ if (func == GPIO_EVENT_FUNC_INIT || func == GPIO_EVENT_FUNC_RESUME) {
+ ii = ip->info->info;
+ for (i = 0; i < ip->info->info_count; i++, ii++) {
+ if ((*ii)->func == NULL) {
+ ret = -ENODEV;
+ pr_err("gpio_event_probe: Incomplete pdata, "
+ "no function\n");
+ goto err_no_func;
+ }
+ if (func == GPIO_EVENT_FUNC_RESUME && (*ii)->no_suspend)
+ continue;
+ ret = (*ii)->func(ip->input_devs, *ii, &ip->state[i],
+ func);
+ if (ret) {
+ pr_err("gpio_event_probe: function failed\n");
+ goto err_func_failed;
+ }
+ }
+ return 0;
+ }
+
+ ret = 0;
+ i = ip->info->info_count;
+ ii = ip->info->info + i;
+ while (i > 0) {
+ i--;
+ ii--;
+ if ((func & ~1) == GPIO_EVENT_FUNC_SUSPEND && (*ii)->no_suspend)
+ continue;
+ (*ii)->func(ip->input_devs, *ii, &ip->state[i], func & ~1);
+err_func_failed:
+err_no_func:
+ ;
+ }
+ return ret;
+}
+
+static void __maybe_unused gpio_event_suspend(struct gpio_event *ip)
+{
+ gpio_event_call_all_func(ip, GPIO_EVENT_FUNC_SUSPEND);
+ if (ip->info->power)
+ ip->info->power(ip->info, 0);
+}
+
+static void __maybe_unused gpio_event_resume(struct gpio_event *ip)
+{
+ if (ip->info->power)
+ ip->info->power(ip->info, 1);
+ gpio_event_call_all_func(ip, GPIO_EVENT_FUNC_RESUME);
+}
+
+static int gpio_event_probe(struct platform_device *pdev)
+{
+ int err;
+ struct gpio_event *ip;
+ struct gpio_event_platform_data *event_info;
+ int dev_count = 1;
+ int i;
+ int registered = 0;
+
+ event_info = pdev->dev.platform_data;
+ if (event_info == NULL) {
+ pr_err("gpio_event_probe: No pdata\n");
+ return -ENODEV;
+ }
+ if ((!event_info->name && !event_info->names[0]) ||
+ !event_info->info || !event_info->info_count) {
+ pr_err("gpio_event_probe: Incomplete pdata\n");
+ return -ENODEV;
+ }
+ if (!event_info->name)
+ while (event_info->names[dev_count])
+ dev_count++;
+ ip = kzalloc(sizeof(*ip) +
+ sizeof(ip->state[0]) * event_info->info_count +
+ sizeof(*ip->input_devs) +
+ sizeof(ip->input_devs->dev[0]) * dev_count, GFP_KERNEL);
+ if (ip == NULL) {
+ err = -ENOMEM;
+ pr_err("gpio_event_probe: Failed to allocate private data\n");
+ goto err_kp_alloc_failed;
+ }
+ ip->input_devs = (void*)&ip->state[event_info->info_count];
+ platform_set_drvdata(pdev, ip);
+
+ for (i = 0; i < dev_count; i++) {
+ struct input_dev *input_dev = input_allocate_device();
+ if (input_dev == NULL) {
+ err = -ENOMEM;
+ pr_err("gpio_event_probe: "
+ "Failed to allocate input device\n");
+ goto err_input_dev_alloc_failed;
+ }
+ input_set_drvdata(input_dev, ip);
+ input_dev->name = event_info->name ?
+ event_info->name : event_info->names[i];
+ input_dev->event = gpio_input_event;
+ ip->input_devs->dev[i] = input_dev;
+ }
+ ip->input_devs->count = dev_count;
+ ip->info = event_info;
+ if (event_info->power)
+ ip->info->power(ip->info, 1);
+
+ err = gpio_event_call_all_func(ip, GPIO_EVENT_FUNC_INIT);
+ if (err)
+ goto err_call_all_func_failed;
+
+ for (i = 0; i < dev_count; i++) {
+ err = input_register_device(ip->input_devs->dev[i]);
+ if (err) {
+ pr_err("gpio_event_probe: Unable to register %s "
+ "input device\n", ip->input_devs->dev[i]->name);
+ goto err_input_register_device_failed;
+ }
+ registered++;
+ }
+
+ return 0;
+
+err_input_register_device_failed:
+ gpio_event_call_all_func(ip, GPIO_EVENT_FUNC_UNINIT);
+err_call_all_func_failed:
+ if (event_info->power)
+ ip->info->power(ip->info, 0);
+ for (i = 0; i < registered; i++)
+ input_unregister_device(ip->input_devs->dev[i]);
+ for (i = dev_count - 1; i >= registered; i--) {
+ input_free_device(ip->input_devs->dev[i]);
+err_input_dev_alloc_failed:
+ ;
+ }
+ kfree(ip);
+err_kp_alloc_failed:
+ return err;
+}
+
+static int gpio_event_remove(struct platform_device *pdev)
+{
+ struct gpio_event *ip = platform_get_drvdata(pdev);
+ int i;
+
+ gpio_event_call_all_func(ip, GPIO_EVENT_FUNC_UNINIT);
+ if (ip->info->power)
+ ip->info->power(ip->info, 0);
+ for (i = 0; i < ip->input_devs->count; i++)
+ input_unregister_device(ip->input_devs->dev[i]);
+ kfree(ip);
+ return 0;
+}
+
+static struct platform_driver gpio_event_driver = {
+ .probe = gpio_event_probe,
+ .remove = gpio_event_remove,
+ .driver = {
+ .name = GPIO_EVENT_DEV_NAME,
+ },
+};
+
+module_platform_driver(gpio_event_driver);
+
+MODULE_DESCRIPTION("GPIO Event Driver");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/input/misc/gpio_input.c b/drivers/input/misc/gpio_input.c
new file mode 100644
index 000000000000..eefd02725aff
--- /dev/null
+++ b/drivers/input/misc/gpio_input.c
@@ -0,0 +1,390 @@
+/* drivers/input/misc/gpio_input.c
+ *
+ * Copyright (C) 2007 Google, Inc.
+ *