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authorLinus Torvalds <torvalds@linux-foundation.org>2011-01-07 14:50:50 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-07 14:50:50 -0800
commitfb5131e1880ea1ba3ba7197cd5cc66c9c288f715 (patch)
treef0d9f25f9079727b9ead5a2b4cc85a0fea9b4668 /arch/s390
parentd074b104cefcb6e8ded55a53e62fed59a246f55d (diff)
parent8e1023016cf17152972b98bce6c144834a4916d5 (diff)
downloadlinux-linaro-android-fb5131e1880ea1ba3ba7197cd5cc66c9c288f715.tar.gz
Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (65 commits) [S390] prevent unneccesary loops_per_jiffy recalculation [S390] cpuinfo: use get_online_cpus() instead of preempt_disable() [S390] smp: remove cpu hotplug messages [S390] mutex: enable spinning mutex on s390 [S390] mutex: Introduce arch_mutex_cpu_relax() [S390] cio: fix ccwgroup unregistration race condition [S390] perf: add DWARF register lookup for s390 [S390] cleanup ftrace backend functions [S390] ptrace cleanup [S390] smp/idle: call init_idle() before starting a new cpu [S390] smp: delay idle task creation [S390] dasd: Correct retry counter for terminated I/O. [S390] dasd: Add support for raw ECKD access. [S390] dasd: Prevent deadlock during suspend/resume. [S390] dasd: Improve handling of stolen DASD reservation [S390] dasd: do path verification for paths added at runtime [S390] dasd: add High Performance FICON multitrack support [S390] cio: reduce memory consumption of itcw structures [S390] nmi: enable machine checks early [S390] qeth: buffer count imbalance ...
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/Kconfig130
-rw-r--r--arch/s390/Kconfig.debug6
-rw-r--r--arch/s390/defconfig152
-rw-r--r--arch/s390/hypfs/Makefile2
-rw-r--r--arch/s390/hypfs/hypfs.h33
-rw-r--r--arch/s390/hypfs/hypfs_dbfs.c116
-rw-r--r--arch/s390/hypfs/hypfs_diag.c82
-rw-r--r--arch/s390/hypfs/hypfs_vm.c62
-rw-r--r--arch/s390/hypfs/inode.c18
-rw-r--r--arch/s390/include/asm/ccwdev.h2
-rw-r--r--arch/s390/include/asm/cputime.h2
-rw-r--r--arch/s390/include/asm/dasd.h3
-rw-r--r--arch/s390/include/asm/ftrace.h11
-rw-r--r--arch/s390/include/asm/hardirq.h16
-rw-r--r--arch/s390/include/asm/irq.h34
-rw-r--r--arch/s390/include/asm/kprobes.h20
-rw-r--r--arch/s390/include/asm/processor.h4
-rw-r--r--arch/s390/include/asm/ptrace.h52
-rw-r--r--arch/s390/include/asm/qdio.h1
-rw-r--r--arch/s390/include/asm/s390_ext.h29
-rw-r--r--arch/s390/include/asm/smp.h3
-rw-r--r--arch/s390/include/asm/system.h4
-rw-r--r--arch/s390/include/asm/thread_info.h10
-rw-r--r--arch/s390/include/asm/timex.h20
-rw-r--r--arch/s390/kernel/asm-offsets.c14
-rw-r--r--arch/s390/kernel/compat_ptrace.h53
-rw-r--r--arch/s390/kernel/entry.S274
-rw-r--r--arch/s390/kernel/entry.h2
-rw-r--r--arch/s390/kernel/entry64.S73
-rw-r--r--arch/s390/kernel/ftrace.c238
-rw-r--r--arch/s390/kernel/irq.c41
-rw-r--r--arch/s390/kernel/kprobes.c470
-rw-r--r--arch/s390/kernel/mcount.S32
-rw-r--r--arch/s390/kernel/mcount64.S29
-rw-r--r--arch/s390/kernel/nmi.c3
-rw-r--r--arch/s390/kernel/process.c21
-rw-r--r--arch/s390/kernel/processor.c20
-rw-r--r--arch/s390/kernel/ptrace.c306
-rw-r--r--arch/s390/kernel/s390_ext.c125
-rw-r--r--arch/s390/kernel/signal.c2
-rw-r--r--arch/s390/kernel/smp.c47
-rw-r--r--arch/s390/kernel/time.c6
-rw-r--r--arch/s390/kernel/traps.c15
-rw-r--r--arch/s390/kernel/vtime.c6
-rw-r--r--arch/s390/kvm/Kconfig7
-rw-r--r--arch/s390/lib/delay.c2
-rw-r--r--arch/s390/mm/fault.c35
47 files changed, 1357 insertions, 1276 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 6c6d7b339aa..ff19efdf6fe 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -1,13 +1,8 @@
-config SCHED_MC
- def_bool y
- depends on SMP
-
config MMU
def_bool y
config ZONE_DMA
- def_bool y
- depends on 64BIT
+ def_bool y if 64BIT
config LOCKDEP_SUPPORT
def_bool y
@@ -25,12 +20,10 @@ config RWSEM_XCHGADD_ALGORITHM
def_bool y
config ARCH_HAS_ILOG2_U32
- bool
- default n
+ def_bool n
config ARCH_HAS_ILOG2_U64
- bool
- default n
+ def_bool n
config GENERIC_HWEIGHT
def_bool y
@@ -42,9 +35,7 @@ config GENERIC_CLOCKEVENTS
def_bool y
config GENERIC_BUG
- bool
- depends on BUG
- default y
+ def_bool y if BUG
config GENERIC_BUG_RELATIVE_POINTERS
def_bool y
@@ -59,13 +50,10 @@ config ARCH_DMA_ADDR_T_64BIT
def_bool 64BIT
config GENERIC_LOCKBREAK
- bool
- default y
- depends on SMP && PREEMPT
+ def_bool y if SMP && PREEMPT
config PGSTE
- bool
- default y if KVM
+ def_bool y if KVM
config VIRT_CPU_ACCOUNTING
def_bool y
@@ -85,7 +73,6 @@ config S390
select HAVE_DYNAMIC_FTRACE
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_REGS_AND_STACK_ACCESS_API
- select HAVE_DEFAULT_NO_SPIN_MUTEXES
select HAVE_OPROFILE
select HAVE_KPROBES
select HAVE_KRETPROBES
@@ -130,8 +117,7 @@ config S390
select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
config SCHED_OMIT_FRAME_POINTER
- bool
- default y
+ def_bool y
source "init/Kconfig"
@@ -144,20 +130,21 @@ comment "Processor type and features"
source "kernel/time/Kconfig"
config 64BIT
- bool "64 bit kernel"
+ def_bool y
+ prompt "64 bit kernel"
help
Select this option if you have an IBM z/Architecture machine
and want to use the 64 bit addressing mode.
config 32BIT
- bool
- default y if !64BIT
+ def_bool y if !64BIT
config KTIME_SCALAR
def_bool 32BIT
config SMP
- bool "Symmetric multi-processing support"
+ def_bool y
+ prompt "Symmetric multi-processing support"
---help---
This enables support for systems with more than one CPU. If you have
a system with only one CPU, like most personal computers, say N. If
@@ -189,10 +176,10 @@ config NR_CPUS
approximately sixteen kilobytes to the kernel image.
config HOTPLUG_CPU
- bool "Support for hot-pluggable CPUs"
+ def_bool y
+ prompt "Support for hot-pluggable CPUs"
depends on SMP
select HOTPLUG
- default n
help
Say Y here to be able to turn CPUs off and on. CPUs
can be controlled through /sys/devices/system/cpu/cpu#.
@@ -208,14 +195,16 @@ config SCHED_MC
increased overhead in some places.
config SCHED_BOOK
- bool "Book scheduler support"
+ def_bool y
+ prompt "Book scheduler support"
depends on SMP && SCHED_MC
help
Book scheduler support improves the CPU scheduler's decision making
when dealing with machines that have several books.
config MATHEMU
- bool "IEEE FPU emulation"
+ def_bool y
+ prompt "IEEE FPU emulation"
depends on MARCH_G5
help
This option is required for IEEE compliant floating point arithmetic
@@ -223,7 +212,8 @@ config MATHEMU
need this.
config COMPAT
- bool "Kernel support for 31 bit emulation"
+ def_bool y
+ prompt "Kernel support for 31 bit emulation"
depends on 64BIT
select COMPAT_BINFMT_ELF
help
@@ -233,16 +223,14 @@ config COMPAT
executing 31 bit applications. It is safe to say "Y".
config SYSVIPC_COMPAT
- bool
- depends on COMPAT && SYSVIPC
- default y
+ def_bool y if COMPAT && SYSVIPC
config AUDIT_ARCH
- bool
- default y
+ def_bool y
config S390_EXEC_PROTECT
- bool "Data execute protection"
+ def_bool y
+ prompt "Data execute protection"
help
This option allows to enable a buffer overflow protection for user
space programs and it also selects the addressing mode option above.
@@ -302,7 +290,8 @@ config MARCH_Z196
endchoice
config PACK_STACK
- bool "Pack kernel stack"
+ def_bool y
+ prompt "Pack kernel stack"
help
This option enables the compiler option -mkernel-backchain if it
is available. If the option is available the compiler supports
@@ -315,7 +304,8 @@ config PACK_STACK
Say Y if you are unsure.
config SMALL_STACK
- bool "Use 8kb for kernel stack instead of 16kb"
+ def_bool n
+ prompt "Use 8kb for kernel stack instead of 16kb"
depends on PACK_STACK && 64BIT && !LOCKDEP
help
If you say Y here and the compiler supports the -mkernel-backchain
@@ -327,7 +317,8 @@ config SMALL_STACK
Say N if you are unsure.
config CHECK_STACK
- bool "Detect kernel stack overflow"
+ def_bool y
+ prompt "Detect kernel stack overflow"
help
This option enables the compiler option -mstack-guard and
-mstack-size if they are available. If the compiler supports them
@@ -351,7 +342,8 @@ config STACK_GUARD
512 for 64 bit.
config WARN_STACK
- bool "Emit compiler warnings for function with broken stack usage"
+ def_bool n
+ prompt "Emit compiler warnings for function with broken stack usage"
help
This option enables the compiler options -mwarn-framesize and
-mwarn-dynamicstack. If the compiler supports these options it
@@ -386,24 +378,24 @@ config ARCH_SPARSEMEM_DEFAULT
def_bool y
config ARCH_SELECT_MEMORY_MODEL
- def_bool y
+ def_bool y
config ARCH_ENABLE_MEMORY_HOTPLUG
- def_bool y
- depends on SPARSEMEM
+ def_bool y if SPARSEMEM
config ARCH_ENABLE_MEMORY_HOTREMOVE
def_bool y
config ARCH_HIBERNATION_POSSIBLE
- def_bool y if 64BIT
+ def_bool y if 64BIT
source "mm/Kconfig"
comment "I/O subsystem configuration"
config QDIO
- tristate "QDIO support"
+ def_tristate y
+ prompt "QDIO support"
---help---
This driver provides the Queued Direct I/O base support for
IBM System z.
@@ -414,7 +406,8 @@ config QDIO
If unsure, say Y.
config CHSC_SCH
- tristate "Support for CHSC subchannels"
+ def_tristate y
+ prompt "Support for CHSC subchannels"
help
This driver allows usage of CHSC subchannels. A CHSC subchannel
is usually present on LPAR only.
@@ -432,7 +425,8 @@ config CHSC_SCH
comment "Misc"
config IPL
- bool "Builtin IPL record support"
+ def_bool y
+ prompt "Builtin IPL record support"
help
If you want to use the produced kernel to IPL directly from a
device, you have to merge a bootsector specific to the device
@@ -464,7 +458,8 @@ config FORCE_MAX_ZONEORDER
default "9"
config PFAULT
- bool "Pseudo page fault support"
+ def_bool y
+ prompt "Pseudo page fault support"
help
Select this option, if you want to use PFAULT pseudo page fault
handling under VM. If running native or in LPAR, this option
@@ -476,7 +471,8 @@ config PFAULT
this option.
config SHARED_KERNEL
- bool "VM shared kernel support"
+ def_bool y
+ prompt "VM shared kernel support"
help
Select this option, if you want to share the text segment of the
Linux kernel between different VM guests. This reduces memory
@@ -487,7 +483,8 @@ config SHARED_KERNEL
doing and want to exploit this feature.
config CMM
- tristate "Cooperative memory management"
+ def_tristate n
+ prompt "Cooperative memory management"
help
Select this option, if you want to enable the kernel interface
to reduce the memory size of the system. This is accomplished
@@ -499,14 +496,16 @@ config CMM
option.
config CMM_IUCV
- bool "IUCV special message interface to cooperative memory management"
+ def_bool y
+ prompt "IUCV special message interface to cooperative memory management"
depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
help
Select this option to enable the special message interface to
the cooperative memory management.
config APPLDATA_BASE
- bool "Linux - VM Monitor Stream, base infrastructure"
+ def_bool n
+ prompt "Linux - VM Monitor Stream, base infrastructure"
depends on PROC_FS
help
This provides a kernel interface for creating and updating z/VM APPLDATA
@@ -521,7 +520,8 @@ config APPLDATA_BASE
The /proc entries can also be read from, showing the current settings.
config APPLDATA_MEM
- tristate "Monitor memory management statistics"
+ def_tristate m
+ prompt "Monitor memory management statistics"
depends on APPLDATA_BASE && VM_EVENT_COUNTERS
help
This provides memory management related data to the Linux - VM Monitor
@@ -537,7 +537,8 @@ config APPLDATA_MEM
appldata_mem.o.
config APPLDATA_OS
- tristate "Monitor OS statistics"
+ def_tristate m
+ prompt "Monitor OS statistics"
depends on APPLDATA_BASE
help
This provides OS related data to the Linux - VM Monitor Stream, like
@@ -551,7 +552,8 @@ config APPLDATA_OS
appldata_os.o.
config APPLDATA_NET_SUM
- tristate "Monitor overall network statistics"
+ def_tristate m
+ prompt "Monitor overall network statistics"
depends on APPLDATA_BASE && NET
help
This provides network related data to the Linux - VM Monitor Stream,
@@ -568,30 +570,32 @@ config APPLDATA_NET_SUM
source kernel/Kconfig.hz
config S390_HYPFS_FS
- bool "s390 hypervisor file system support"
+ def_bool y
+ prompt "s390 hypervisor file system support"
select SYS_HYPERVISOR
- default y
help
This is a virtual file system intended to provide accounting
information in an s390 hypervisor environment.
config KEXEC
- bool "kexec system call"
+ def_bool n
+ prompt "kexec system call"
help
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot
but is independent of hardware/microcode support.
config ZFCPDUMP
- bool "zfcpdump support"
+ def_bool n
+ prompt "zfcpdump support"
select SMP
- default n
help
Select this option if you want to build an zfcpdump enabled kernel.
Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
config S390_GUEST
-bool "s390 guest support for KVM (EXPERIMENTAL)"
+ def_bool y
+ prompt "s390 guest support for KVM (EXPERIMENTAL)"
depends on 64BIT && EXPERIMENTAL
select VIRTIO
select VIRTIO_RING
@@ -603,9 +607,9 @@ bool "s390 guest support for KVM (EXPERIMENTAL)"
the default console.
config SECCOMP
- bool "Enable seccomp to safely compute untrusted bytecode"
+ def_bool y
+ prompt "Enable seccomp to safely compute untrusted bytecode"
depends on PROC_FS
- default y
help
This kernel feature is useful for number crunching applications
that may need to compute untrusted bytecode during their
diff --git a/arch/s390/Kconfig.debug b/arch/s390/Kconfig.debug
index 05221b13ffb..2b380df9560 100644
--- a/arch/s390/Kconfig.debug
+++ b/arch/s390/Kconfig.debug
@@ -1,8 +1,7 @@
menu "Kernel hacking"
config TRACE_IRQFLAGS_SUPPORT
- bool
- default y
+ def_bool y
source "lib/Kconfig.debug"
@@ -19,7 +18,8 @@ config STRICT_DEVMEM
If you are unsure, say Y.
config DEBUG_STRICT_USER_COPY_CHECKS
- bool "Strict user copy size checks"
+ def_bool n
+ prompt "Strict user copy size checks"
---help---
Enabling this option turns a certain set of sanity checks for user
copy operations into compile time warnings.
diff --git a/arch/s390/defconfig b/arch/s390/defconfig
index e40ac6ee652..d79697157ac 100644
--- a/arch/s390/defconfig
+++ b/arch/s390/defconfig
@@ -2,16 +2,12 @@ CONFIG_EXPERIMENTAL=y
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
CONFIG_AUDIT=y
+CONFIG_RCU_TRACE=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
-CONFIG_CGROUPS=y
-CONFIG_CGROUP_NS=y
-CONFIG_SYSFS_DEPRECATED_V2=y
-CONFIG_UTS_NS=y
-CONFIG_IPC_NS=y
CONFIG_BLK_DEV_INITRD=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
-# CONFIG_COMPAT_BRK is not set
+CONFIG_PERF_EVENTS=y
CONFIG_SLAB=y
CONFIG_KPROBES=y
CONFIG_MODULES=y
@@ -20,24 +16,12 @@ CONFIG_MODVERSIONS=y
CONFIG_DEFAULT_DEADLINE=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
-CONFIG_64BIT=y
-CONFIG_SMP=y
-CONFIG_NR_CPUS=32
-CONFIG_COMPAT=y
-CONFIG_S390_EXEC_PROTECT=y
-CONFIG_PACK_STACK=y
-CONFIG_CHECK_STACK=y
CONFIG_PREEMPT=y
CONFIG_MEMORY_HOTPLUG=y
CONFIG_MEMORY_HOTREMOVE=y
-CONFIG_QDIO=y
-CONFIG_CHSC_SCH=m
-CONFIG_IPL=y
CONFIG_BINFMT_MISC=m
-CONFIG_PFAULT=y
CONFIG_HZ_100=y
CONFIG_KEXEC=y
-CONFIG_S390_GUEST=y
CONFIG_PM=y
CONFIG_HIBERNATION=y
CONFIG_PACKET=y
@@ -46,16 +30,15 @@ CONFIG_NET_KEY=y
CONFIG_AFIUCV=m
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
+# CONFIG_INET_LRO is not set
CONFIG_IPV6=y
-CONFIG_NETFILTER=y
-CONFIG_NETFILTER_NETLINK_QUEUE=m
-CONFIG_NETFILTER_NETLINK_LOG=m
-CONFIG_NF_CONNTRACK=m
-# CONFIG_NF_CT_PROTO_SCTP is not set
+CONFIG_NET_SCTPPROBE=m
+CONFIG_L2TP=m
+CONFIG_L2TP_DEBUGFS=m
+CONFIG_VLAN_8021Q=y
CONFIG_NET_SCHED=y
CONFIG_NET_SCH_CBQ=m
CONFIG_NET_SCH_PRIO=m
-CONFIG_NET_SCH_MULTIQ=y
CONFIG_NET_SCH_RED=m
CONFIG_NET_SCH_SFQ=m
CONFIG_NET_SCH_TEQL=m
@@ -69,28 +52,14 @@ CONFIG_NET_CLS_U32=m
CONFIG_CLS_U32_MARK=y
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
-CONFIG_NET_CLS_FLOW=m
CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=y
-CONFIG_NET_ACT_NAT=m
-CONFIG_CAN=m
-CONFIG_CAN_RAW=m
-CONFIG_CAN_BCM=m
-CONFIG_CAN_VCAN=m
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
# CONFIG_FIRMWARE_IN_KERNEL is not set
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_NBD=m
CONFIG_BLK_DEV_RAM=y
-CONFIG_BLK_DEV_XIP=y
-CONFIG_BLK_DEV_XPRAM=m
-CONFIG_DASD=y
-CONFIG_DASD_PROFILE=y
-CONFIG_DASD_ECKD=y
-CONFIG_DASD_FBA=y
-CONFIG_DASD_DIAG=y
-CONFIG_DASD_EER=y
-CONFIG_VIRTIO_BLK=m
+CONFIG_VIRTIO_BLK=y
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y
CONFIG_CHR_DEV_ST=y
@@ -102,101 +71,92 @@ CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y
CONFIG_ZFCP=y
-CONFIG_SCSI_DH=m
-CONFIG_SCSI_DH_RDAC=m
-CONFIG_SCSI_DH_HP_SW=m
-CONFIG_SCSI_DH_EMC=m
-CONFIG_SCSI_DH_ALUA=m
-CONFIG_SCSI_OSD_INITIATOR=m
-CONFIG_SCSI_OSD_ULD=m
-CONFIG_MD=y
-CONFIG_BLK_DEV_MD=y
-CONFIG_MD_LINEAR=m
-CONFIG_MD_RAID0=m
-CONFIG_MD_RAID1=m
-CONFIG_MD_MULTIPATH=m
-CONFIG_BLK_DEV_DM=y
-CONFIG_DM_CRYPT=y
-CONFIG_DM_SNAPSHOT=y
-CONFIG_DM_MIRROR=y
-CONFIG_DM_ZERO=y
-CONFIG_DM_MULTIPATH=m
+CONFIG_ZFCP_DIF=y
CONFIG_NETDEVICES=y
CONFIG_DUMMY=m
CONFIG_BONDING=m
CONFIG_EQUALIZER=m
CONFIG_TUN=m
-CONFIG_VETH=m
CONFIG_NET_ETHERNET=y
-CONFIG_LCS=m
-CONFIG_CTCM=m
-CONFIG_QETH=y
-CONFIG_QETH_L2=y
-CONFIG_QETH_L3=y
-CONFIG_VIRTIO_NET=m
-CONFIG_HW_RANDOM_VIRTIO=m
+CONFIG_VIRTIO_NET=y
CONFIG_RAW_DRIVER=m
-CONFIG_TN3270=y
-CONFIG_TN3270_TTY=y
-CONFIG_TN3270_FS=m
-CONFIG_TN3270_CONSOLE=y
-CONFIG_TN3215=y
-CONFIG_TN3215_CONSOLE=y
-CONFIG_SCLP_TTY=y
-CONFIG_SCLP_CONSOLE=y
-CONFIG_SCLP_VT220_TTY=y
-CONFIG_SCLP_VT220_CONSOLE=y
-CONFIG_SCLP_CPI=m
-CONFIG_SCLP_ASYNC=m
-CONFIG_S390_TAPE=m
-CONFIG_S390_TAPE_BLOCK=y
-CONFIG_S390_TAPE_34XX=m
-CONFIG_ACCESSIBILITY=y
CONFIG_EXT2_FS=y
CONFIG_EXT3_FS=y
# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
+CONFIG_EXT4_FS=y
+CONFIG_EXT4_FS_POSIX_ACL=y
+CONFIG_EXT4_FS_SECURITY=y
CONFIG_PROC_KCORE=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
-CONFIG_NFS_FS=y
-CONFIG_NFS_V3=y
-CONFIG_NFSD=y
-CONFIG_NFSD_V3=y
+# CONFIG_NETWORK_FILESYSTEMS is not set
CONFIG_PARTITION_ADVANCED=y
CONFIG_IBM_PARTITION=y
CONFIG_DLM=m
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_KERNEL=y
-# CONFIG_SCHED_DEBUG is not set
-CONFIG_DEBUG_SPINLOCK=y
-CONFIG_DEBUG_MUTEXES=y
+CONFIG_TIMER_STATS=y
+CONFIG_PROVE_LOCKING=y
+CONFIG_PROVE_RCU=y
+CONFIG_LOCK_STAT=y
+CONFIG_DEBUG_LOCKDEP=y
CONFIG_DEBUG_SPINLOCK_SLEEP=y
+CONFIG_DEBUG_LIST=y
+CONFIG_DEBUG_NOTIFIERS=y
# CONFIG_RCU_CPU_STALL_DETECTOR is not set
-CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y
+CONFIG_KPROBES_SANITY_TEST=y
+CONFIG_CPU_NOTIFIER_ERROR_INJECT=m
+CONFIG_LATENCYTOP=y
CONFIG_SYSCTL_SYSCALL_CHECK=y
-CONFIG_SAMPLES=y
-CONFIG_CRYPTO_FIPS=y
+CONFIG_DEBUG_PAGEALLOC=y
+# CONFIG_FTRACE is not set
+# CONFIG_STRICT_DEVMEM is not set
+CONFIG_CRYPTO_NULL=m
+CONFIG_CRYPTO_CRYPTD=m
CONFIG_CRYPTO_AUTHENC=m
+CONFIG_CRYPTO_TEST=m
CONFIG_CRYPTO_CCM=m
CONFIG_CRYPTO_GCM=m
+CONFIG_CRYPTO_CBC=y
CONFIG_CRYPTO_CTS=m
CONFIG_CRYPTO_ECB=m
+CONFIG_CRYPTO_LRW=m
CONFIG_CRYPTO_PCBC=m
+CONFIG_CRYPTO_XTS=m
+CONFIG_CRYPTO_XCBC=m
CONFIG_CRYPTO_VMAC=m
+CONFIG_CRYPTO_MD4=m
+CONFIG_CRYPTO_MICHAEL_MIC=m
CONFIG_CRYPTO_RMD128=m
CONFIG_CRYPTO_RMD160=m
CONFIG_CRYPTO_RMD256=m
CONFIG_CRYPTO_RMD320=m
+CONFIG_CRYPTO_SHA256=m
+CONFIG_CRYPTO_SHA512=m
+CONFIG_CRYPTO_TGR192=m
+CONFIG_CRYPTO_WP512=m
+CONFIG_CRYPTO_ANUBIS=m
+CONFIG_CRYPTO_ARC4=m
+CONFIG_CRYPTO_BLOWFISH=m
CONFIG_CRYPTO_CAMELLIA=m
+CONFIG_CRYPTO_CAST5=m
+CONFIG_CRYPTO_CAST6=m
+CONFIG_CRYPTO_DES=m
CONFIG_CRYPTO_FCRYPT=m
+CONFIG_CRYPTO_KHAZAD=m
CONFIG_CRYPTO_SALSA20=m
CONFIG_CRYPTO_SEED=m
+CONFIG_CRYPTO_SERPENT=m
+CONFIG_CRYPTO_TEA=m
+CONFIG_CRYPTO_TWOFISH=m
+CONFIG_CRYPTO_DEFLATE=m
CONFIG_CRYPTO_ZLIB=m
CONFIG_CRYPTO_LZO=m
CONFIG_ZCRYPT=m
+CONFIG_CRYPTO_SHA1_S390=m
+CONFIG_CRYPTO_SHA256_S390=m
CONFIG_CRYPTO_SHA512_S390=m
-CONFIG_CRC_T10DIF=y
-CONFIG_CRC32=m
+CONFIG_CRYPTO_DES_S390=m
+CONFIG_CRYPTO_AES_S390=m
CONFIG_CRC7=m
-CONFIG_KVM=m
-CONFIG_VIRTIO_BALLOON=m
+CONFIG_VIRTIO_BALLOON=y
diff --git a/arch/s390/hypfs/Makefile b/arch/s390/hypfs/Makefile
index b08d2abf617..2e671d5004c 100644
--- a/arch/s390/hypfs/Makefile
+++ b/arch/s390/hypfs/Makefile
@@ -4,4 +4,4 @@
obj-$(CONFIG_S390_HYPFS_FS) += s390_hypfs.o
-s390_hypfs-objs := inode.o hypfs_diag.o hypfs_vm.o
+s390_hypfs-objs := inode.o hypfs_diag.o hypfs_vm.o hypfs_dbfs.o
diff --git a/arch/s390/hypfs/hypfs.h b/arch/s390/hypfs/hypfs.h
index fa487d4cc08..80c1526f2af 100644
--- a/arch/s390/hypfs/hypfs.h
+++ b/arch/s390/hypfs/hypfs.h
@@ -12,6 +12,8 @@
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/debugfs.h>
+#include <linux/workqueue.h>
+#include <linux/kref.h>
#define REG_FILE_MODE 0440
#define UPDATE_FILE_MODE 0220
@@ -38,6 +40,33 @@ extern int hypfs_vm_init(void);
extern void hypfs_vm_exit(void);
extern int hypfs_vm_create_files(struct super_block *sb, struct dentry *root);
-/* Directory for debugfs files */
-extern struct dentry *hypfs_dbfs_dir;
+/* debugfs interface */
+struct hypfs_dbfs_file;
+
+struct hypfs_dbfs_data {
+ void *buf;
+ void *buf_free_ptr;
+ size_t size;
+ struct hypfs_dbfs_file *dbfs_file;;
+ struct kref kref;
+};
+
+struct hypfs_dbfs_file {
+ const char *name;
+ int (*data_create)(void **data, void **data_free_ptr,
+ size_t *size);
+ void (*data_free)(const void *buf_free_ptr);
+
+ /* Private data for hypfs_dbfs.c */
+ struct hypfs_dbfs_data *data;
+ struct delayed_work data_free_work;
+ struct mutex lock;
+ struct dentry *dentry;
+};
+
+extern int hypfs_dbfs_init(void);
+extern void hypfs_dbfs_exit(void);
+extern int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
+extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df);
+
#endif /* _HYPFS_H_ */
diff --git a/arch/s390/hypfs/hypfs_dbfs.c b/arch/s390/hypfs/hypfs_dbfs.c
new file mode 100644
index 00000000000..b478013b7fe
--- /dev/null
+++ b/arch/s390/hypfs/hypfs_dbfs.c
@@ -0,0 +1,116 @@
+/*
+ * Hypervisor filesystem for Linux on s390 - debugfs interface
+ *
+ * Copyright (C) IBM Corp. 2010
+ * Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com>
+ */
+
+#include <linux/slab.h>
+#include "hypfs.h"
+
+static struct dentry *dbfs_dir;
+
+static struct hypfs_dbfs_data *hypfs_dbfs_data_alloc(struct hypfs_dbfs_file *f)
+{
+ struct hypfs_dbfs_data *data;
+
+ data = kmalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return NULL;
+ kref_init(&data->kref);
+ data->dbfs_file = f;
+ return data;
+}
+
+static void hypfs_dbfs_data_free(struct kref *kref)
+{
+ struct hypfs_dbfs_data *data;
+
+ data = container_of(kref, struct hypfs_dbfs_data, kref);
+ data->dbfs_file->data_free(data->buf_free_ptr);
+ kfree(data);
+}
+
+static void data_free_delayed(struct work_struct *work)
+{
+ struct hypfs_dbfs_data *data;
+ struct hypfs_dbfs_file *df;
+
+ df = container_of(work, struct hypfs_dbfs_file, data_free_work.work);
+ mutex_lock(&df->lock);
+ data = df->data;
+ df->data = NULL;
+ mutex_unlock(&df->lock);
+ kref_put(&data->kref, hypfs_dbfs_data_free);
+}
+
+static ssize_t dbfs_read(struct file *file, char __user *buf,
+ size_t size, loff_t *ppos)
+{
+ struct hypfs_dbfs_data *data;
+ struct hypfs_dbfs_file *df;
+ ssize_t rc;
+
+ if (*ppos != 0)
+ return 0;
+
+ df = file->f_path.dentry->d_inode->i_private;
+ mutex_lock(&df->lock);
+ if (!df->data) {
+ data = hypfs_dbfs_data_alloc(df);
+ if (!data) {
+ mutex_unlock(&df->lock);
+ return -ENOMEM;
+ }
+ rc = df->data_create(&data->buf, &data->buf_free_ptr,
+ &data->size);
+ if (rc) {
+ mutex_unlock(&df->lock);
+ kfree(data);
+ return rc;
+ }
+ df->data = data;
+ schedule_delayed_work(&df->data_free_work, HZ);
+ }
+ data = df->data;
+ kref_get(&data->kref);
+ mutex_unlock(&df->lock);
+
+ rc = simple_read_from_buffer(buf, size, ppos, data->buf, data->size);
+ kref_put(&data->kref, hypfs_dbfs_data_free);
+ return rc;
+}
+
+static const struct file_operations dbfs_ops = {
+ .read = dbfs_read,
+ .llseek = no_llseek,
+};
+
+int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df)
+{
+ df->dentry = debugfs_create_file(df->name, 0400, dbfs_dir, df,
+ &dbfs_ops);
+ if (IS_ERR(df->dentry))
+ return PTR_ERR(df->dentry);
+ mutex_init(&df->lock);
+ INIT_DELAYED_WORK(&df->data_free_work, data_free_delayed);
+ return 0;
+}
+
+void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df)
+{
+ debugfs_remove(df->dentry);
+}
+
+int hypfs_dbfs_init(void)
+{
+ dbfs_dir = debugfs_create_dir("s390_hypfs", NULL);
+ if (IS_ERR(dbfs_dir))
+ return PTR_ERR(dbfs_dir);
+ return 0;
+}
+
+void hypfs_dbfs_exit(void)
+{
+ debugfs_remove(dbfs_dir);
+}
diff --git a/arch/s390/hypfs/hypfs_diag.c b/arch/s390/hypfs/hypfs_diag.c
index cd4a81be9cf..6023c6dc1fb 100644
--- a/arch/s390/hypfs/hypfs_diag.c
+++ b/arch/s390/hypfs/hypfs_diag.c
@@ -555,81 +555,38 @@ struct dbfs_d204 {
char buf[]; /* d204 buffer */
} __attribute__ ((packed));
-struct dbfs_d204_private {
- struct dbfs_d204 *d204; /* Aligned d204 data with header */
- void *base; /* Base pointer (needed for vfree) */
-};
-
-static int dbfs_d204_open(struct inode *inode, struct file *file)
+static int dbfs_d204_create(void **data, void **data_free_ptr, size_t *size)
{
- struct dbfs_d204_private *data;
struct dbfs_d204 *d204;
int rc, buf_size;
+ void *base;
- data = kzalloc(sizeof(*data), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
buf_size = PAGE_SIZE * (diag204_buf_pages + 1) + sizeof(d204->hdr);
- data->base = vmalloc(buf_size);
- if (!data->base) {
- rc = -ENOMEM;
- goto fail_kfree_data;
+ base = vmalloc(buf_size);
+ if (!base)
+ return -ENOMEM;
+ memset(base, 0, buf_size);
+ d204 = page_align_ptr(base + sizeof(d204->hdr)) - sizeof(d204->hdr);
+ rc = diag204_do_store(d204->buf, diag204_buf_pages);
+ if (rc) {
+ vfree(base);
+ return rc;
}
- memset(data->base, 0, buf_size);
- d204 = page_align_ptr(data->base + sizeof(d204->hdr))
- - sizeof(d204->hdr);
- rc = diag204_do_store(&d204->buf, diag204_buf_pages);
- if (rc)
- goto fail_vfree_base;
d204->hdr.version = DBFS_D204_HDR_VERSION;
d204->hdr.len = PAGE_SIZE * diag204_buf_pages;
d204->hdr.sc = diag204_store_sc;
- data->d204 = d204;
- file->private_data = data;
- return nonseekable_open(inode, file);
-
-fail_vfree_base:
- vfree(data->base);
-fail_kfree_data:
- kfree(data);
- return rc;
-}
-
-static int dbfs_d204_release(struct inode *inode, struct file *file)
-{
- struct dbfs_d204_private *data = file->private_data;
-
- vfree(data->base);
- kfree(data);
+ *data = d204;
+ *data_free_ptr = base;
+ *size = d204->hdr.len + sizeof(struct dbfs_d204_hdr);
return 0;
}
-static ssize_t dbfs_d204_read(struct file *file, char __user *buf,
- size_t size, loff_t *ppos)
-{
- struct dbfs_d204_private *data = file->private_data;
-
- return simple_read_from_buffer(buf, size, ppos, data->d204,
- data->d204->hdr.len +
- sizeof(data->d204->hdr));
-}
-
-static const struct file_operations dbfs_d204_ops = {
- .open = dbfs_d204_open,
- .read = dbfs_d204_read,
- .release = dbfs_d204_release,
- .llseek = no_llseek,
+static struct hypfs_dbfs_file dbfs_file_d204 = {
+ .name = "diag_204",
+ .data_create = dbfs_d204_create,
+ .data_free = vfree,
};
-static int hypfs_dbfs_init(void)
-{
- dbfs_d204_file = debugfs_create_file("diag_204", 0400, hypfs_dbfs_dir,
- NULL, &dbfs_d204_ops);
- if (IS_ERR(dbfs_d204_file))
- return PTR_ERR(dbfs_d204_file);
- return 0;
-}
-
__init int hypfs_diag_init(void)
{
int rc;
@@ -639,7 +596,7 @@ __init int hypfs_diag_init(void)
return -ENODATA;
}
if (diag204_info_type == INFO_EXT) {
- rc = hypfs_dbfs_init();
+ rc = hypfs_dbfs_create_file(&dbfs_file_d204);
if (rc)
return rc;
}
@@ -660,6 +617,7 @@ void hypfs_diag_exit(void)
debugfs_remove(dbfs_d204_file);
diag224_delete_name_table();
diag204_free_buffer();
+ hypfs_dbfs_remove_file(&dbfs_file_d204);
}
/*
diff --git a/arch/s390/hypfs/hypfs_vm.c b/arch/s390/hypfs/hypfs_vm.c
index 26cf177f6a3..e54796002f6 100644
--- a/arch/s390/hypfs/hypfs_vm.c
+++ b/arch/s390/hypfs/hypfs_vm.c
@@ -20,8 +20,6 @@ static char local_guest[] = " ";
static char all_guests[] = "* ";
static char *guest_query;
-static struct dentry *dbfs_d2fc_file;
-
struct diag2fc_data {
__u32 version;
__u32 flags;
@@ -104,7 +102,7 @@ static void *diag2fc_store(char *query, unsigned int *count, int offset)
return data;
}
-static void diag2fc_free(void *data)
+static void diag2fc_free(const void *data)
{
vfree(data);
}
@@ -239,43 +237,29 @@ struct dbfs_d2fc {
char buf[]; /* d2fc buffer */
} __attribute__ ((packed));
-static int dbfs_d2fc_open(struct inode *inode, struct file *file)
+static int dbfs_diag2fc_create(void **data, void **data_free_ptr, size_t *size)
{
- struct dbfs_d2fc *data;
+ struct dbfs_d2fc *d2fc;
unsigned int count;
- data = diag2fc_store(guest_query, &count, sizeof(data->hdr));
- if (IS_ERR(data))
- return PTR_ERR(data);
- get_clock_ext(data->hdr.tod_ext);
- data->hdr.len = count * sizeof(struct diag2fc_data);
- data->hdr.version = DBFS_D2FC_HDR_VERSION;
- data->hdr.count = count;
- memset(&data->hdr.reserved, 0, sizeof(data->hdr.reserved));
- file->private_data = data;
- return nonseekable_open(inode, file);
-}
-
-static int dbfs_d2fc_release(struct inode *inode, struct file *file)
-{
- diag2fc_free(file->private_data);
+ d2fc = diag2fc_store(guest_query, &count, sizeof(d2fc->hdr));
+ if (IS_ERR(d2fc))
+ return PTR_ERR(d2fc);
+ get_clock_ext(d2fc->hdr.tod_ext);
+ d2fc->hdr.len = count * sizeof(struct diag2fc_data);
+ d2fc->hdr.version = DBFS_D2FC_HDR_VERSION;
+ d2fc->hdr.count = count;
+ memset(&d2fc->hdr.reserved, 0, sizeof(d2fc->hdr.reserved));
+ *data = d2fc;
+ *data_free_ptr = d2fc;
+ *size = d2fc->hdr.len + sizeof(struct dbfs_d2fc_hdr);
return 0;
}
-static ssize_t dbfs_d2fc_read(struct file *file, char __user *buf,
- size_t size, loff_t *ppos)
-{
- struct dbfs_d2fc *data = file->private_data;
-
- return simple_read_from_buffer(buf, size, ppos, data, data->hdr.len +
- sizeof(struct dbfs_d2fc_hdr));
-}
-
-static const struct file_operations dbfs_d2fc_ops = {
- .open = dbfs_d2fc_open,
- .read = dbfs_d2fc_read,
- .release = dbfs_d2fc_release,
- .llseek = no_llseek,
+static struct hypfs_dbfs_file dbfs_file_2fc = {
+ .name = "diag_2fc",
+ .data_create = dbfs_diag2fc_create,
+ .data_free = diag2fc_free,
};
int hypfs_vm_init(void)
@@ -288,18 +272,12 @@ int hypfs_vm_init(void)
guest_query = local_guest;
else
return -EACCES;
-
- dbfs_d2fc_file = debugfs_create_file("diag_2fc", 0400, hypfs_dbfs_dir,
- NULL, &dbfs_d2fc_ops);
- if (IS_ERR(dbfs_d2fc_file))
- return PTR_ERR(dbfs_d2fc_file);
-
- return 0;
+ return hypfs_dbfs_create_file(&dbfs_file_2fc);
}
void hypfs_vm_exit(void)
{
if (!MACHINE_IS_VM)
return;
- debugfs_remove(dbfs_d2fc_file);
+ hypfs_dbfs_remove_file(&dbfs_file_2fc);
}
diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c
index 47cc446dab8..6fe874fc5f8 100644
--- a/arch/s390/hypfs/inode.c
+++ b/arch/s390/hypfs/inode.c
@@ -46,8 +46,6 @@ static const struct super_operations hypfs_s_ops;
/* start of list of all dentries, which have to be deleted on update */
static struct dentry *hypfs_last_dentry;
-struct dentry *hypfs_dbfs_dir;
-
static void hypfs_update_update(struct super_block *sb)
{
struct hypfs_sb_info *sb_info = sb->s_fs_info;
@@ -471,13 +469,12 @@ static int __init hypfs_init(void)
{
int rc;
- hypfs_dbfs_dir = debugfs_create_dir("s390_hypfs", NULL);
- if (IS_ERR(hypfs_dbfs_dir))
- return PTR_ERR(hypfs_dbfs_dir);
-
+ rc = hypfs_dbfs_init();
+ if (rc)
+ return rc;
if (hypfs_diag_init()) {
rc = -ENODATA;
- goto fail_debugfs_remove;
+ goto fail_dbfs_exit;
}
if (hypfs_vm_init()) {
rc = -ENODATA;
@@ -499,9 +496,8 @@ fail_hypfs_vm_exit:
hypfs_vm_exit();
fail_hypfs_diag_exit:
hypfs_diag_exit();
-fail_debugfs_remove:
- debugfs_remove(hypfs_dbfs_dir);
-
+fail_dbfs_exit:
+ hypfs_dbfs_exit();
pr_err("Initialization of hypfs failed with rc=%i\n", rc);
return rc;
}
@@ -510,7 +506,7 @@ static void __exit hypfs_exit(void)
{
hypfs_diag_exit();
hypfs_vm_exit();
- debugfs_remove(hypfs_dbfs_dir);
+ hypfs_dbfs_exit();
unregister_filesystem(&hypfs_type);
kobject_put(s390_kobj);
}
diff --git a/arch/s390/include/asm/ccwdev.h b/arch/s390/include/asm/ccwdev.h
index e8501115eca..ff6f62e0ec3 100644
--- a/arch/s390/include/asm/ccwdev.h
+++ b/arch/s390/include/asm/ccwdev.h
@@ -204,6 +204,8 @@ int ccw_device_tm_start_timeout(struct ccw_device *, struct tcw *,
unsigned long, u8, int);
int ccw_device_tm_intrg(struct ccw_device *cdev);
+int ccw_device_get_mdc(struct ccw_device *cdev, u8 mask);
+
extern int ccw_device_set_online(struct ccw_device *cdev);
extern int ccw_device_set_offline(struct ccw_device *cdev);
diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h
index 40e2ab0fa3f..08143487829 100644
--- a/arch/s390/include/asm/cputime.h
+++ b/arch/s390/include/asm/cputime.h
@@ -202,7 +202,7 @@ static inline void s390_idle_check(struct pt_regs *regs, __u64 int_clock,
static inline int s390_nohz_delay(int cpu)
{
- return per_cpu(s390_idle, cpu).nohz_delay != 0;
+ return __get_cpu_var(s390_idle).nohz_delay != 0;
}
#define arch_needs_cpu(cpu) s390_nohz_delay(cpu)
diff --git a/arch/s390/include/asm/dasd.h b/arch/s390/include/asm/dasd.h
index b604a9186f8..0be28efe5b6 100644
--- a/arch/s390/include/asm/dasd.h
+++ b/arch/s390/include/asm/dasd.h
@@ -73,6 +73,7 @@ typedef struct dasd_information2_t {
* 0x02: use diag discipline (diag)
* 0x04: set the device initially online (internal use only)
* 0x08: enable ERP related logging
+ * 0x20: give access to raw eckd data
*/
#define DASD_FEATURE_DEFAULT 0x00
#define DASD_FEATURE_READONLY 0x01
@@ -80,6 +81,8 @@ typedef struct dasd_information2_t {
#define DASD_FEATURE_INITIAL_ONLINE 0x04
#define DASD_FEATURE_ERPLOG 0x08
#define DASD_FEATURE_FAILFAST 0x10
+#define DASD_FEATURE_FAILONSLCK 0x20
+#define DASD_FEATURE_USERAW 0x40
#define DASD_PARTN_BITS 2
diff --git a/arch/s390/include/asm/ftrace.h b/arch/s390/include/asm/ftrace.h
index 96c14a9102b..3c29be4836e 100644
--- a/arch/s390/include/asm/ftrace.h
+++ b/arch/s390/include/asm/ftrace.h
@@ -4,20 +4,17 @@
#ifndef __ASSEMBLY__
extern void _mcount(void);
-extern unsigned long ftrace_dyn_func;
struct dyn_arch_ftrace { };
#define MCOUNT_ADDR ((long)_mcount)
#ifdef CONFIG_64BIT
-#define MCOUNT_OFFSET_RET 18
-#define MCOUNT_INSN_SIZE 24
-#define MCOUNT_OFFSET 14
-#else
-#define MCOUNT_OFFSET_RET 26
-#define MCOUNT_INSN_SIZE 30
+#define MCOUNT_INSN_SIZE 12
#define MCOUNT_OFFSET 8
+#else
+#define MCOUNT_INSN_SIZE 20
+#define MCOUNT_OFFSET 4
#endif
static inline unsigned long ftrace_call_adjust(unsigned long addr)
diff --git a/arch/s390/include/asm/hardirq.h b/arch/s390/include/asm/hardirq.h
index 881d94590ae..e4155d3eb2c 100644
--- a/arch/s390/include/asm/hardirq.h
+++ b/arch/s390/include/asm/hardirq.h
@@ -21,20 +21,4 @@
#define HARDIRQ_BITS 8
-void clock_comparator_work(void);
-
-static inline unsigned long long local_tick_disable(void)
-{
- unsigned long long old;
-
- old = S390_lowcore.clock_comparator;
- S390_lowcore.clock_comparator = -1ULL;
- return old;
-}
-
-static inline void local_tick_enable(unsigned long long comp)
-{
- S390_lowcore.clock_comparator = comp;
-}
-
#endif /* __ASM_HARDIRQ_H */
diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h
index 7da991a858f..db14a311f1d 100644
--- a/arch/s390/include/asm/irq.h
+++ b/arch/s390/include/asm/irq.h
@@ -1,23 +1,33 @@
#ifndef _ASM_IRQ_H
#define _ASM_IRQ_H
-#ifdef __KERNEL__
#include <linux/hardirq.h>
-/*
- * the definition of irqs has changed in 2.5.46:
- * NR_IRQS is no longer the number of i/o
- * interrupts (65536), but rather the number
- * of interrupt classes (2).
- * Only external and i/o interrupts make much sense here (CH).
- */
-
enum interruption_class {
EXTERNAL_INTERRUPT,
IO_INTERRUPT,
-
+ EXTINT_CLK,
+ EXTINT_IPI,
+ EXTINT_TMR,
+ EXTINT_TLA,
+ EXTINT_PFL,
+ EXTINT_DSD,
+ EXTINT_VRT,
+ EXTINT_SCP,
+ EXTINT_IUC,
+ IOINT_QAI,
+ IOINT_QDI,
+ IOINT_DAS,
+ IOINT_C15,
+ IOINT_C70,
+ IOINT_TAP,
+ IOINT_VMR,
+ IOINT_LCS,
+ IOINT_CLW,
+ IOINT_CTC,
+ IOINT_APB,
+ NMI_NMI,
NR_IRQS,
};
-#endif /* __KERNEL__ */
-#endif
+#endif /* _ASM_IRQ_H */
diff --git a/arch/s390/include/asm/kprobes.h b/arch/s390/include/asm/kprobes.h
index 330f68caffe..a231a9439c4 100644
--- a/arch/s390/include/asm/kprobes.h
+++ b/arch/s390/include/asm/kprobes.h
@@ -31,7 +31,6 @@
#include <linux/ptrace.h>
#include <linux/percpu.h>
-#define __ARCH_WANT_KPROBES_INSN_SLOT
struct pt_regs;
struct kprobe;
@@ -58,23 +57,12 @@ typedef u16 kprobe_opcode_t;
/* Architecture specific copy of original instruction */
struct arch_specific_insn {
/* copy of original instruction */
- kprobe_opcode_t *insn;
- int fixup;
- int ilen;
- int reg;
+ kprobe_opcode_t insn[MAX_INSN_SIZE];
};
-struct ins_replace_args {
- kprobe_opcode_t *ptr;
- kprobe_opcode_t old;
- kprobe_opcode_t new;
-};
struct prev_kprobe {
struct kprobe *kp;
unsigned long status;
- unsigned long saved_psw;
- unsigned long kprobe_saved_imask;
- unsigned long kprobe_saved_ctl[3];
};
/* per-cpu kprobe control block */
@@ -82,17 +70,13 @@ struct kprobe_ctlblk {
unsigned long kprobe_status;
unsigned long kprobe_saved_imask;
unsigned long kprobe_saved_ctl[3];
- struct pt_regs jprobe_saved_regs;
- unsigned long jprobe_saved_r14;
- unsigned long jprobe_saved_r15;
struct prev_kprobe prev_kprobe;
+ struct pt_regs jprobe_saved_regs;
kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
};
void arch_remove_kprobe(struct kprobe *p);
void kretprobe_trampoline(void);
-int is_prohibited_opcode(kprobe_opcode_t *instruction);
-void get_instruction_type(struct arch_specific_insn *ainsn);
int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
int kprobe_exceptions_notify(struct notifier_block *self,
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 8d6f8716957..bf3de04170a 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -32,7 +32,6 @@ static inline void get_cpu_id(struct cpuid *ptr)
}
extern void s390_adjust_jiffies(void);
-extern void print_cpu_info(void);
extern int get_cpu_capability(unsigned int *);
/*
@@ -81,7 +80,8 @@ struct thread_struct {
mm_segment_t mm_segment;
unsigned long prot_addr; /* address of protection-excep. */
unsigned int trap_no;
- per_struct per_info;
+ struct per_regs per_user; /* User specified PER registers */
+ struct per_event per_event; /* Cause of the last PER trap */
/* pfault_wait is used to block the process on a pfault event */
unsigned long pfault_wait;
};
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
index d9d42b1e46f..9ad628a8574 100644
--- a/arch/s390/include/asm/ptrace.h
+++ b/arch/s390/include/asm/ptrace.h
@@ -331,10 +331,60 @@ struct pt_regs
unsigned short ilc;
unsigned short svcnr;
};
+
+/*
+ * Program event recording (PER) register set.
+ */
+struct per_regs {
+ unsigned long control; /* PER control bits */
+ unsigned long start; /* PER starting address */
+ unsigned long end; /* PER ending address */
+};
+
+/*
+ * PER event contains information about the cause of the last PER exception.
+ */
+struct per_event {
+ unsigned short cause; /* PER code, ATMID and AI */
+ unsigned long address; /* PER address */
+ unsigned char paid; /* PER access identification */
+};
+
+/*
+ * Simplified per_info structure used to decode the ptrace user space ABI.
+ */
+struct per_struct_kernel {
+ unsigned long cr9; /* PER control bits */
+ unsigned long cr10; /* PER starting address */
+ unsigned long cr11; /* PER ending address */
+ unsigned long bits; /* Obsolete software bits */
+ unsigned long starting_addr; /* User specified start address */
+ unsigned long ending_addr; /* User specified end address */
+ unsigned short perc_atmid; /* PER trap ATMID */
+ unsigned long address; /* PER trap instruction address */
+ unsigned char access_id; /* PER trap access identification */
+};
+
+#define PER_EVENT_MASK 0xE9000000UL
+
+#define PER_EVENT_BRANCH 0x80000000UL
+#define PER_EVENT_IFETCH 0x40000000UL
+#define PER_EVENT_STORE 0x20000000UL
+#define PER_EVENT_STORE_REAL 0x08000000UL
+#define PER_EVENT_NULLIFICATION 0x01000000UL
+
+#define PER_CONTROL_MASK 0x00a00000UL
+
+#define PER_CONTROL_BRANCH_ADDRESS 0x00800000UL
+#define PER_CONTROL_ALTERATION 0x00200000UL
+
#endif
/*
- * Now for the program event recording (trace) definitions.
+ * Now for the user space program event recording (trace) definitions.
+ * The following structures are used only for the ptrace interface, don't
+ * touch or even look at it if you don't want to modify the user-space
+ * ptrace interface. In particular stay away from it for in-kernel PER.
*/
typedef struct
{
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h
index 46e96bc1f5a..350e7ee5952 100644
--- a/arch/s390/include/asm/qdio.h
+++ b/arch/s390/include/asm/qdio.h
@@ -361,6 +361,7 @@ struct qdio_initialize {
qdio_handler_t *input_handler;
qdio_handler_t *output_handler;
void (*queue_start_poll) (struct ccw_device *, int, unsigned long);
+ int scan_threshold;
unsigned long int_parm;
void **input_sbal_addr_array;
void **output_sbal_addr_array;
diff --git a/arch/s390/include/asm/s390_ext.h b/arch/s390/include/asm/s390_ext.h
index 1a9307e7084..080876d5f19 100644
--- a/arch/s390/include/asm/s390_ext.h
+++ b/arch/s390/include/asm/s390_ext.h
@@ -1,32 +1,17 @@
-#ifndef _S390_EXTINT_H
-#define _S390_EXTINT_H
-
/*
- * include/asm-s390/s390_ext.h
- *
- * S390 version
- * Copyright IBM Corp. 1999,2007
- * Author(s): Holger Smolinski (Holger.Smolinski@de.ibm.com),
- * Martin Schwidefsky (schwidefsky@de.ibm.com)
+ * Copyright IBM Corp. 1999,2010
+ * Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>,
+ * Martin Schwidefsky <schwidefsky@de.ibm.com>,
*/
+#ifndef _S390_EXTINT_H
+#define _S390_EXTINT_H
+
#include <linux/types.h>
typedef void (*ext_int_handler_t)(unsigned int, unsigned int, unsigned long);
-typedef struct ext_int_info_t {
- struct ext_int_info_t *next;
- ext_int_handler_t handler;
- __u16 code;
-} ext_int_info_t;
-
-extern ext_int_info_t *ext_int_hash[];
-
int register_external_interrupt(__u16 code, ext_int_handler_t handler);
-int register_early_external_interrupt(__u16 code, ext_int_handler_t handler,
- ext_int_info_t *info);
int unregister_external_interrupt(__u16 code, ext_int_handler_t handler);
-int unregister_early_external_interrupt(__u16 code, ext_int_handler_t handler,
- ext_int_info_t *info);
-#endif
+#endif /* _S390_EXTINT_H */
diff --git a/arch/s390/include/asm/smp.h b/arch/s390/include/asm/smp.h
index edc03cb9cd7..045e009fc16 100644
--- a/arch/s390/include/asm/smp.h
+++ b/arch/s390/include/asm/smp.h
@@ -20,7 +20,6 @@ extern void machine_power_off_smp(void);
extern int __cpu_disable (void);
extern void __cpu_die (unsigned int cpu);
-extern void cpu_die (void) __attribute__ ((noreturn));
extern int __cpu_up (unsigned int cpu);
extern struct mutex smp_cpu_state_mutex;
@@ -71,8 +70,10 @@ static inline void smp_switch_to_ipl_cpu(void (*func)(void *), void *data)
#ifdef CONFIG_HOTPLUG_CPU
extern int smp_rescan_cpus(void);
+extern void __noreturn cpu_die(void);
#else
static inline int smp_rescan_cpus(void) { return 0; }
+static inline void cpu_die(void) { }
#endif
#endif /* __ASM_SMP_H */
diff --git a/arch/s390/include/asm/system.h b/arch/s390/include/asm/system.h
index 3ad16dbf622..6710b0eac16 100644
--- a/arch/s390/include/asm/system.h
+++ b/arch/s390/include/asm/system.h
@@ -20,6 +20,7 @@
struct task_struct;
extern struct task_struct *__switch_to(void *, void *);
+extern void update_per_regs(struct task_struct *task);
static inline void save_fp_regs(s390_fp_regs *fpregs)
{
@@ -93,6 +94,7 @@ static inline void restore_access_regs(unsigned int *acrs)
if (next->mm) { \
restore_fp_regs(&next->thread.fp_regs); \
restore_access_regs(&next->thread.acrs[0]); \
+ update_per_regs(next); \
} \
prev = __switch_to(prev,next); \
} while (0)
@@ -101,11 +103,9 @@ extern void account_vtime(struct task_struct *, struct task_struct *);
extern void account_tick_vtime(struct task_struct *);
#ifdef CONFIG_PFAULT
-extern void pfault_irq_init(void);
extern int pfault_init(void);
extern void pfault_fini(void);
#else /* CONFIG_PFAULT */
-#define pfault_irq_init() do { } while (0)
#define pfault_init() ({-1;})
#define pfault_fini() do { } while (0)
#endif /* CONFIG_PFAULT */
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index 5baf0230b29..ebc77091466 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -74,7 +74,7 @@ struct thread_info {
/* how to get the thread information struct from C */
static inline struct thread_info *current_thread_info(void)
{
- return (struct thread_info *)(S390_lowcore.kernel_stack - THREAD_SIZE);
+ return (struct thread_info *) S390_lowcore.thread_info;
}
#define THREAD_SIZE_ORDER THREAD_ORDER
@@ -88,7 +88,7 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_RESTART_SVC 4 /* restart svc with new svc number */
-#define TIF_SINGLE_STEP 6 /* deliver sigtrap on return to user */
+#define TIF_PER_TRAP 6 /* deliver sigtrap on return to user */
#define TIF_MCCK_PENDING 7 /* machine check handling is pending */
#define TIF_SYSCALL_TRACE 8 /* syscall trace active */
#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
@@ -99,14 +99,15 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_31BIT 17 /* 32bit process */
#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 19 /* restore signal mask in do_signal() */
-#define TIF_FREEZE 20 /* thread is freezing for suspend */
+#define TIF_SINGLE_STEP 20 /* This task is single stepped */
+#define TIF_FREEZE 21 /* thread is freezing for suspend */
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_RESTART_SVC (1<<TIF_RESTART_SVC)
-#define _TIF_SINGLE_STEP (1<<TIF_SINGLE_STEP)
+#define _TIF_PER_TRAP (1<<TIF_PER_TRAP)
#define _TIF_MCCK_PENDING (1<<TIF_MCCK_PENDING)
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
@@ -114,6 +115,7 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_31BIT (1<<TIF_31BIT)
+#define _TIF_SINGLE_STEP (1<<TIF_FREEZE)
#define _TIF_FREEZE (1<<TIF_FREEZE)
#endif /* __KERNEL__ */
diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h
index 09d345a701d..88829a40af6 100644
--- a/arch/s390/include/asm/timex.h
+++ b/arch/s390/include/asm/timex.h
@@ -11,6 +11,8 @@
#ifndef _ASM_S390_TIMEX_H
#define _ASM_S390_TIMEX_H
+#include <asm/lowcore.h>
+
/* The value of the TOD clock for 1.1.1970. */
#define TOD_UNIX_EPOCH 0x7d91048bca000000ULL
@@ -49,6 +51,24 @@ static inline void store_clock_comparator(__u64 *time)
asm volatile("stckc %0" : "=Q" (*time));
}
+void clock_comparator_work(void);
+
+static inline unsigned long long local_tick_disable(void)
+{
+ unsigned long long old;
+
+ old = S390_lowcore.clock_comparator;
+ S390_lowcore.clock_comparator = -1ULL;
+ set_clock_comparator(S390_lowcore.clock_comparator);
+ return old;
+}
+
+static inline void local_tick_enable(unsigned long long comp)
+{
+ S390_lowcore.clock_comparator = comp;
+ set_clock_comparator(S390_lowcore.clock_comparator);
+}
+
#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
typedef unsigned long long cycles_t;
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index 33982e7ce04..fe03c140002 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -23,14 +23,16 @@ int main(void)
{
DEFINE(__THREAD_info, offsetof(struct task_struct, stack));
DEFINE(__THREAD_ksp, offsetof(struct task_struct, thread.ksp));
- DEFINE(__THREAD_per, offsetof(struct task_struct, thread.per_info));
DEFINE(__THREAD_mm_segment, offsetof(struct task_struct, thread.mm_segment));
BLANK();
DEFINE(__TASK_pid, offsetof(struct task_struct, pid));
BLANK();
- DEFINE(__PER_atmid, offsetof(per_struct, lowcore.words.perc_atmid));
- DEFINE(__PER_address, offsetof(per_struct, lowcore.words.address));
- DEFINE(__PER_access_id, offsetof(per_struct, lowcore.words.access_id));
+ DEFINE(__THREAD_per_cause,
+ offsetof(struct task_struct, thread.per_event.cause));
+ DEFINE(__THREAD_per_address,
+ offsetof(struct task_struct, thread.per_event.address));
+ DEFINE(__THREAD_per_paid,
+ offsetof(struct task_struct, thread.per_event.paid));
BLANK();
DEFINE(__TI_task, offsetof(struct thread_info, task));
DEFINE(__TI_domain, offsetof(struct thread_info, exec_domain));
@@ -85,9 +87,9 @@ int main(void)
DEFINE(__LC_PGM_ILC, offsetof(struct _lowcore, pgm_ilc));
DEFINE(__LC_PGM_INT_CODE, offsetof(struct _lowcore, pgm_code));
DEFINE(__LC_TRANS_EXC_CODE, offsetof(struct _lowcore, trans_exc_code));
- DEFINE(__LC_PER_ATMID, offsetof(struct _lowcore, per_perc_atmid));
+ DEFINE(__LC_PER_CAUSE, offsetof(struct _lowcore, per_perc_atmid));
DEFINE(__LC_PER_ADDRESS, offsetof(struct _lowcore, per_address));
- DEFINE(__LC_PER_ACCESS_ID, offsetof(struct _lowcore, per_access_id));
+ DEFINE(__LC_PER_PAID, offsetof(struct _lowcore, per_access_id));
DEFINE(__LC_AR_MODE_ID, offsetof(struct _lowcore, ar_access_id));
DEFINE(__LC_SUBCHANNEL_ID, offsetof(struct _lowcore, subchannel_id));
DEFINE(__LC_SUBCHANNEL_NR, offsetof(struct _lowcore, subchannel_nr));
diff --git a/arch/s390/kernel/compat_ptrace.h b/arch/s390/kernel/compat_ptrace.h
index 3141025724f..12b82383351 100644
--- a/arch/s390/kernel/compat_ptrace.h
+++ b/arch/s390/kernel/compat_ptrace.h
@@ -4,40 +4,19 @@
#include <asm/ptrace.h> /* needed for NUM_CR_WORDS */
#include "compat_linux.h" /* needed for psw_compat_t */
-typedef struct {
- __u32 cr[NUM_CR_WORDS];
-} per_cr_words32;
-
-typedef struct {
- __u16 perc_atmid; /* 0x096 */
- __u32 address; /* 0x098 */
- __u8 access_id; /* 0x0a1 */
-} per_lowcore_words32;
-
-typedef struct {
- union {
- per_cr_words32 words;
- } control_regs;
- /*
- * Use these flags instead of setting em_instruction_fetch
- * directly they are used so that single stepping can be
- * switched on & off while not affecting other tracing
- */
- unsigned single_step : 1;
- unsigned instruction_fetch : 1;
- unsigned : 30;
- /*
- * These addresses are copied into cr10 & cr11 if single
- * stepping is switched off
- */
- __u32 starting_addr;
- __u32 ending_addr;
- union {
- per_lowcore_words32 words;
- } lowcore;
-} per_struct32;
+struct compat_per_struct_kernel {
+ __u32 cr9; /* PER control bits */
+ __u32 cr10; /* PER starting address */
+ __u32 cr11; /* PER ending address */
+ __u32 bits; /* Obsolete software bits */
+ __u32 starting_addr; /* User specified start address */
+ __u32 ending_addr; /* User specified end address */
+ __u16 perc_atmid; /* PER trap ATMID */
+ __u32 address; /* PER trap instruction address */
+ __u8 access_id; /* PER trap access identification */
+};
-struct user_regs_struct32
+struct compat_user_regs_struct
{
psw_compat_t psw;
u32 gprs[NUM_GPRS];
@@ -50,14 +29,14 @@ struct user_regs_struct32
* itself as there is no "official" ptrace interface for hardware
* watchpoints. This is the way intel does it.
*/
- per_struct32 per_info;
+ struct compat_per_struct_kernel per_info;
u32 ieee_instruction_pointer; /* obsolete, always 0 */
};
-struct user32 {
+struct compat_user {
/* We start with the registers, to mimic the way that "memory"
is returned from the ptrace(3,...) function. */
- struct user_regs_struct32 regs; /* Where the registers are actually stored */
+ struct compat_user_regs_struct regs;
/* The rest of this junk is to help gdb figure out what goes where */
u32 u_tsize; /* Text segment size (pages). */
u32 u_dsize; /* Data segment size (pages). */
@@ -79,6 +58,6 @@ typedef struct
__u32 len;
__u32 kernel_addr;
__u32 process_addr;
-} ptrace_area_emu31;
+} compat_ptrace_area;
#endif /* _PTRACE32_H */
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 1ecc337fb67..648f64239a9 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -9,7 +9,6 @@
* Heiko Carstens <heiko.carstens@de.ibm.com>
*/
-#include <linux/sys.h>
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/cache.h>
@@ -49,7 +48,7 @@ SP_SVCNR = STACK_FRAME_OVERHEAD + __PT_SVCNR
SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE
_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
- _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
+ _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_PER_TRAP )
_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING)
_TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
@@ -110,31 +109,36 @@ STACK_SIZE = 1 << STACK_SHIFT
1: stm %r10,%r11,\lc_sum
.endm
- .macro SAVE_ALL_BASE savearea
+ .macro SAVE_ALL_SVC psworg,savearea
stm %r12,%r15,\savearea
l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13
+ l %r15,__LC_KERNEL_STACK # problem state -> load ksp
+ s %r15,BASED(.Lc_spsize) # make room for registers & psw
.endm
- .macro SAVE_ALL_SVC psworg,savearea
- la %r12,\psworg
- l %r15,__LC_KERNEL_STACK # problem state -> load ksp
+ .macro SAVE_ALL_BASE savearea
+ stm %r12,%r15,\savearea
+ l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13
.endm
- .macro SAVE_ALL_SYNC psworg,savearea
- la %r12,\psworg
+ .macro SAVE_ALL_PGM psworg,savearea
tm \psworg+1,0x01 # test problem state bit
- bz BASED(2f) # skip stack setup save
- l %r15,__LC_KERNEL_STACK # problem state -> load ksp
#ifdef CONFIG_CHECK_STACK
- b BASED(3f)
-2: tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
- bz BASED(stack_overflow)
-3:
+ bnz BASED(1f)
+ tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
+ bnz BASED(2f)
+ la %r12,\psworg
+ b BASED(stack_overflow)
+#else
+ bz BASED(2f)
#endif
-2:
+1: l %r15,__LC_KERNEL_STACK # problem state -> load ksp
+2: s %r15,BASED(.Lc_spsize) # make room for registers & psw
.endm
.macro SAVE_ALL_ASYNC psworg,savearea
+ stm %r12,%r15,\savearea
+ l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13
la %r12,\psworg
tm \psworg+1,0x01 # test problem state bit
bnz BASED(1f) # from user -> load async stack
@@ -149,27 +153,23 @@ STACK_SIZE = 1 << STACK_SHIFT
0: l %r14,__LC_ASYNC_STACK # are we already on the async stack ?
slr %r14,%r15
sra %r14,STACK_SHIFT
- be BASED(2f)
-1: l %r15,__LC_ASYNC_STACK
#ifdef CONFIG_CHECK_STACK
- b BASED(3f)
-2: tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
- bz BASED(stack_overflow)
-3:
+ bnz BASED(1f)
+ tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
+ bnz BASED(2f)
+ b BASED(stack_overflow)
+#else
+ bz BASED(2f)
#endif
-2:
+1: l %r15,__LC_ASYNC_STACK
+2: s %r15,BASED(.Lc_spsize) # make room for registers & psw
.endm
- .macro CREATE_STACK_FRAME psworg,savearea
- s %r15,BASED(.Lc_spsize) # make room for registers & psw
- mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack
+ .macro CREATE_STACK_FRAME savearea
+ xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
st %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
- icm %r12,12,__LC_SVC_ILC
- stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
- st %r12,SP_ILC(%r15)
mvc SP_R12(16,%r15),\savearea # move %r12-%r15 to stack
- la %r12,0
- st %r12,__SF_BACKCHAIN(%r15) # clear back chain
+ stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
.endm
.macro RESTORE_ALL psworg,sync
@@ -188,6 +188,8 @@ STACK_SIZE = 1 << STACK_SHIFT
ssm __SF_EMPTY(%r15)
.endm
+ .section .kprobes.text, "ax"
+
/*
* Scheduler resume function, called by switch_to
* gpr2 = (task_struct *) prev
@@ -198,31 +200,21 @@ STACK_SIZE = 1 << STACK_SHIFT
.globl __switch_to
__switch_to:
basr %r1,0
-__switch_to_base:
- tm __THREAD_per(%r3),0xe8 # new process is using per ?
- bz __switch_to_noper-__switch_to_base(%r1) # if not we're fine
- stctl %c9,%c11,__SF_EMPTY(%r15) # We are using per stuff
- clc __THREAD_per(12,%r3),__SF_EMPTY(%r15)
- be __switch_to_noper-__switch_to_base(%r1) # we got away w/o bashing TLB's
- lctl %c9,%c11,__THREAD_per(%r3) # Nope we didn't
-__switch_to_noper:
- l %r4,__THREAD_info(%r2) # get thread_info of prev
+0: l %r4,__THREAD_info(%r2) # get thread_info of prev
+ l %r5,__THREAD_info(%r3) # get thread_info of next
tm __TI_flags+3(%r4),_TIF_MCCK_PENDING # machine check pending?
- bz __switch_to_no_mcck-__switch_to_base(%r1)
- ni __TI_flags+3(%r4),255-_TIF_MCCK_PENDING # clear flag in prev
- l %r4,__THREAD_info(%r3) # get thread_info of next
- oi __TI_flags+3(%r4),_TIF_MCCK_PENDING # set it in next
-__switch_to_no_mcck:
- stm %r6,%r15,__SF_GPRS(%r15)# store __switch_to registers of prev task
- st %r15,__THREAD_ksp(%r2) # store kernel stack to prev->tss.ksp
- l %r15,__THREAD_ksp(%r3) # load kernel stack from next->tss.ksp
- lm %r6,%r15,__SF_GPRS(%r15)# load __switch_to registers of next task
- st %r3,__LC_CURRENT # __LC_CURRENT = current task struct
- lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
- l %r3,__THREAD_info(%r3) # load thread_info from task struct
- st %r3,__LC_THREAD_INFO
- ahi %r3,STACK_SIZE
- st %r3,__LC_KERNEL_STACK # __LC_KERNEL_STACK = new kernel stack
+ bz 1f-0b(%r1)
+ ni __TI_flags+3(%r4),255-_TIF_MCCK_PENDING # clear flag in prev
+ oi __TI_flags+3(%r5),_TIF_MCCK_PENDING # set it in next
+1: stm %r6,%r15,__SF_GPRS(%r15) # store gprs of prev task
+ st %r15,__THREAD_ksp(%r2) # store kernel stack of prev
+ l %r15,__THREAD_ksp(%r3) # load kernel stack of next
+ lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
+ lm %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
+ st %r3,__LC_CURRENT # store task struct of next
+ st %r5,__LC_THREAD_INFO # store thread info of next
+ ahi %r5,STACK_SIZE # end of kernel stack of next
+ st %r5,__LC_KERNEL_STACK # store end of kernel stack
br %r14
__critical_start:
@@ -235,10 +227,11 @@ __critical_start:
system_call:
stpt __LC_SYNC_ENTER_TIMER
sysc_saveall:
- SAVE_ALL_BASE __LC_SAVE_AREA
SAVE_ALL_SVC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
- CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
- lh %r7,0x8a # get svc number from lowcore
+ CREATE_STACK_FRAME __LC_SAVE_AREA
+ mvc SP_PSW(8,%r15),__LC_SVC_OLD_PSW
+ mvc SP_ILC(4,%r15),__LC_SVC_ILC
+ l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
sysc_vtime:
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
sysc_stime:
@@ -246,20 +239,20 @@ sysc_stime:
sysc_update:
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
sysc_do_svc:
- l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- ltr %r7,%r7 # test for svc 0
+ xr %r7,%r7
+ icm %r7,3,SP_SVCNR(%r15) # load svc number and test for svc 0
bnz BASED(sysc_nr_ok) # svc number > 0
# svc 0: system call number in %r1
cl %r1,BASED(.Lnr_syscalls)
bnl BASED(sysc_nr_ok)
+ sth %r1,SP_SVCNR(%r15)
lr %r7,%r1 # copy svc number to %r7
sysc_nr_ok:
- sth %r7,SP_SVCNR(%r15)
sll %r7,2 # svc number *4
- l %r8,BASED(.Lsysc_table)
- tm __TI_flags+2(%r9),_TIF_SYSCALL
+ l %r10,BASED(.Lsysc_table)
+ tm __TI_flags+2(%r12),_TIF_SYSCALL
mvc SP_ARGS(4,%r15),SP_R7(%r15)
- l %r8,0(%r7,%r8) # get system call addr.
+ l %r8,0(%r7,%r10) # get system call addr.
bnz BASED(sysc_tracesys)
basr %r14,%r8 # call sys_xxxx
st %r2,SP_R2(%r15) # store return value (change R2 on stack)
@@ -267,7 +260,7 @@ sysc_nr_ok:
sysc_return:
LOCKDEP_SYS_EXIT
sysc_tif:
- tm __TI_flags+3(%r9),_TIF_WORK_SVC
+ tm __TI_flags+3(%r12),_TIF_WORK_SVC
bnz BASED(sysc_work) # there is work to do (signals etc.)
sysc_restore:
RESTORE_ALL __LC_RETURN_PSW,1
@@ -284,17 +277,17 @@ sysc_work:
# One of the work bits is on. Find out which one.
#
sysc_work_tif:
- tm __TI_flags+3(%r9),_TIF_MCCK_PENDING
+ tm __TI_flags+3(%r12),_TIF_MCCK_PENDING
bo BASED(sysc_mcck_pending)
- tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
+ tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
bo BASED(sysc_reschedule)
- tm __TI_flags+3(%r9),_TIF_SIGPENDING
+ tm __TI_flags+3(%r12),_TIF_SIGPENDING
bo BASED(sysc_sigpending)
- tm __TI_flags+3(%r9),_TIF_NOTIFY_RESUME
+ tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME
bo BASED(sysc_notify_resume)
- tm __TI_flags+3(%r9),_TIF_RESTART_SVC
+ tm __TI_flags+3(%r12),_TIF_RESTART_SVC
bo BASED(sysc_restart)
- tm __TI_flags+3(%r9),_TIF_SINGLE_STEP
+ tm __TI_flags+3(%r12),_TIF_PER_TRAP
bo BASED(sysc_singlestep)
b BASED(sysc_return) # beware of critical section cleanup
@@ -318,13 +311,13 @@ sysc_mcck_pending:
# _TIF_SIGPENDING is set, call do_signal
#
sysc_sigpending:
- ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
+ ni __TI_flags+3(%r12),255-_TIF_PER_TRAP # clear TIF_PER_TRAP
la %r2,SP_PTREGS(%r15) # load pt_regs
l %r1,BASED(.Ldo_signal)
basr %r14,%r1 # call do_signal
- tm __TI_flags+3(%r9),_TIF_RESTART_SVC
+ tm __TI_flags+3(%r12),_TIF_RESTART_SVC
bo BASED(sysc_restart)
- tm __TI_flags+3(%r9),_TIF_SINGLE_STEP
+ tm __TI_flags+3(%r12),_TIF_PER_TRAP
bo BASED(sysc_singlestep)
b BASED(sysc_return)
@@ -342,23 +335,23 @@ sysc_notify_resume:
# _TIF_RESTART_SVC is set, set up registers and restart svc
#
sysc_restart:
- ni __TI_flags+3(%r9),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
+ ni __TI_flags+3(%r12),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
l %r7,SP_R2(%r15) # load new svc number
mvc SP_R2(4,%r15),SP_ORIG_R2(%r15) # restore first argument
lm %r2,%r6,SP_R2(%r15) # load svc arguments
+ sth %r7,SP_SVCNR(%r15)
b BASED(sysc_nr_ok) # restart svc
#
-# _TIF_SINGLE_STEP is set, call do_single_step
+# _TIF_PER_TRAP is set, call do_per_trap
#
sysc_singlestep:
- ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
- mvi SP_SVCNR(%r15),0xff # set trap indication to pgm check
- mvi SP_SVCNR+1(%r15),0xff
+ ni __TI_flags+3(%r12),255-_TIF_PER_TRAP # clear TIF_PER_TRAP
+ xc SP_SVCNR(2,%r15),SP_SVCNR(%r15) # clear svc number
la %r2,SP_PTREGS(%r15) # address of register-save area
l %r1,BASED(.Lhandle_per) # load adr. of per handler
la %r14,BASED(sysc_return) # load adr. of system return
- br %r1 # branch to do_single_step
+ br %r1 # branch to do_per_trap
#
# call tracehook_report_syscall_entry/tracehook_report_syscall_exit before
@@ -368,15 +361,15 @@ sysc_tracesys:
l %r1,BASED(.Ltrace_entry)
la %r2,SP_PTREGS(%r15) # load pt_regs
la %r3,0
- srl %r7,2
- st %r7,SP_R2(%r15)
+ xr %r0,%r0
+ icm %r0,3,SP_SVCNR(%r15)
+ st %r0,SP_R2(%r15)
basr %r14,%r1
cl %r2,BASED(.Lnr_syscalls)
bnl BASED(sysc_tracenogo)
- l %r8,BASED(.Lsysc_table)
lr %r7,%r2
sll %r7,2 # svc number *4
- l %r8,0(%r7,%r8)
+ l %r8,0(%r7,%r10)
sysc_tracego:
lm %r3,%r6,SP_R3(%r15)
mvc SP_ARGS(4,%r15),SP_R7(%r15)
@@ -384,7 +377,7 @@ sysc_tracego:
basr %r14,%r8 # call sys_xxx
st %r2,SP_R2(%r15) # store return value
sysc_tracenogo:
- tm __TI_flags+2(%r9),_TIF_SYSCALL
+ tm __TI_flags+2(%r12),_TIF_SYSCALL
bz BASED(sysc_return)
l %r1,BASED(.Ltrace_exit)
la %r2,SP_PTREGS(%r15) # load pt_regs
@@ -397,7 +390,7 @@ sysc_tracenogo:
.globl ret_from_fork
ret_from_fork:
l %r13,__LC_SVC_NEW_PSW+4
- l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
+ l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # forking a kernel thread ?
bo BASED(0f)
st %r15,SP_R15(%r15) # store stack pointer for new kthread
@@ -432,8 +425,8 @@ kernel_execve:
0: stnsm __SF_EMPTY(%r15),0xfc # disable interrupts
l %r15,__LC_KERNEL_STACK # load ksp
s %r15,BASED(.Lc_spsize) # make room for registers & psw
- l %r9,__LC_THREAD_INFO
mvc SP_PTREGS(__PT_SIZE,%r15),0(%r12) # copy pt_regs
+ l %r12,__LC_THREAD_INFO
xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
l %r1,BASED(.Lexecve_tail)
@@ -463,26 +456,27 @@ pgm_check_handler:
SAVE_ALL_BASE __LC_SAVE_AREA
tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
bnz BASED(pgm_per) # got per exception -> special case
- SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
- CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
+ SAVE_ALL_PGM __LC_PGM_OLD_PSW,__LC_SAVE_AREA
+ CREATE_STACK_FRAME __LC_SAVE_AREA
+ xc SP_ILC(4,%r15),SP_ILC(%r15)
+ mvc SP_PSW(8,%r15),__LC_PGM_OLD_PSW
+ l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(pgm_no_vtime)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
pgm_no_vtime:
- l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
l %r3,__LC_PGM_ILC # load program interruption code
l %r4,__LC_TRANS_EXC_CODE
REENABLE_IRQS
la %r8,0x7f
nr %r8,%r3
-pgm_do_call:
- l %r7,BASED(.Ljump_table)
sll %r8,2
- l %r7,0(%r8,%r7) # load address of handler routine
+ l %r1,BASED(.Ljump_table)
+ l %r1,0(%r8,%r1) # load address of handler routine
la %r2,SP_PTREGS(%r15) # address of register-save area
- basr %r14,%r7 # branch to interrupt-handler
+ basr %r14,%r1 # branch to interrupt-handler
pgm_exit:
b BASED(sysc_return)
@@ -503,33 +497,34 @@ pgm_per:
# Normal per exception
#
pgm_per_std:
- SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
- CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
+ SAVE_ALL_PGM __LC_PGM_OLD_PSW,__LC_SAVE_AREA
+ CREATE_STACK_FRAME __LC_SAVE_AREA
+ mvc SP_PSW(8,%r15),__LC_PGM_OLD_PSW
+ l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(pgm_no_vtime2)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
pgm_no_vtime2:
- l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- l %r1,__TI_task(%r9)
+ l %r1,__TI_task(%r12)
tm SP_PSW+1(%r15),0x01 # kernel per event ?
bz BASED(kernel_per)
- mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
- mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
- mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
- oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
+ mvc __THREAD_per_cause(2,%r1),__LC_PER_CAUSE
+ mvc __THREAD_per_address(4,%r1),__LC_PER_ADDRESS
+ mvc __THREAD_per_paid(1,%r1),__LC_PER_PAID
+ oi __TI_flags+3(%r12),_TIF_PER_TRAP # set TIF_PER_TRAP
l %r3,__LC_PGM_ILC # load program interruption code
l %r4,__LC_TRANS_EXC_CODE
REENABLE_IRQS
la %r8,0x7f
nr %r8,%r3 # clear per-event-bit and ilc
be BASED(pgm_exit2) # only per or per+check ?
- l %r7,BASED(.Ljump_table)
sll %r8,2
- l %r7,0(%r8,%r7) # load address of handler routine
+ l %r1,BASED(.Ljump_table)
+ l %r1,0(%r8,%r1) # load address of handler routine
la %r2,SP_PTREGS(%r15) # address of register-save area
- basr %r14,%r7 # branch to interrupt-handler
+ basr %r14,%r1 # branch to interrupt-handler
pgm_exit2:
b BASED(sysc_return)
@@ -537,18 +532,19 @@ pgm_exit2:
# it was a single stepped SVC that is causing all the trouble
#
pgm_svcper:
- SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
- CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
+ SAVE_ALL_PGM __LC_SVC_OLD_PSW,__LC_SAVE_AREA
+ CREATE_STACK_FRAME __LC_SAVE_AREA
+ mvc SP_PSW(8,%r15),__LC_SVC_OLD_PSW
+ mvc SP_ILC(4,%r15),__LC_SVC_ILC
+ l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
- lh %r7,0x8a # get svc number from lowcore
- l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- l %r8,__TI_task(%r9)
- mvc __THREAD_per+__PER_atmid(2,%r8),__LC_PER_ATMID
- mvc __THREAD_per+__PER_address(4,%r8),__LC_PER_ADDRESS
- mvc __THREAD_per+__PER_access_id(1,%r8),__LC_PER_ACCESS_ID
- oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
+ l %r8,__TI_task(%r12)
+ mvc __THREAD_per_cause(2,%r8),__LC_PER_CAUSE
+ mvc __THREAD_per_address(4,%r8),__LC_PER_ADDRESS
+ mvc __THREAD_per_paid(1,%r8),__LC_PER_PAID
+ oi __TI_flags+3(%r12),_TIF_PER_TRAP # set TIF_PER_TRAP
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
lm %r2,%r6,SP_R2(%r15) # load svc arguments
b BASED(sysc_do_svc)
@@ -558,8 +554,7 @@ pgm_svcper:
#
kernel_per:
REENABLE_IRQS
- mvi SP_SVCNR(%r15),0xff # set trap indication to pgm check
- mvi SP_SVCNR+1(%r15),0xff
+ xc SP_SVCNR(2,%r15),SP_SVCNR(%r15)
la %r2,SP_PTREGS(%r15) # address of register-save area
l %r1,BASED(.Lhandle_per) # load adr. of per handler
basr %r14,%r1 # branch to do_single_step
@@ -573,9 +568,10 @@ kernel_per:
io_int_handler:
stck __LC_INT_CLOCK
stpt __LC_ASYNC_ENTER_TIMER
- SAVE_ALL_BASE __LC_SAVE_AREA+16
SAVE_ALL_ASYNC __LC_IO_OLD_PSW,__LC_SAVE_AREA+16
- CREATE_STACK_FRAME __LC_IO_OLD_PSW,__LC_SAVE_AREA+16
+ CREATE_STACK_FRAME __LC_SAVE_AREA+16
+ mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack
+ l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(io_no_vtime)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
@@ -583,7 +579,6 @@ io_int_handler:
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
io_no_vtime:
TRACE_IRQS_OFF
- l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
l %r1,BASED(.Ldo_IRQ) # load address of do_IRQ
la %r2,SP_PTREGS(%r15) # address of register-save area
basr %r14,%r1 # branch to standard irq handler
@@ -591,7 +586,7 @@ io_return:
LOCKDEP_SYS_EXIT
TRACE_IRQS_ON
io_tif:
- tm __TI_flags+3(%r9),_TIF_WORK_INT
+ tm __TI_flags+3(%r12),_TIF_WORK_INT
bnz BASED(io_work) # there is work to do (signals etc.)
io_restore:
RESTORE_ALL __LC_RETURN_PSW,0
@@ -609,9 +604,9 @@ io_work:
bo BASED(io_work_user) # yes -> do resched & signal
#ifdef CONFIG_PREEMPT
# check for preemptive scheduling
- icm %r0,15,__TI_precount(%r9)
+ icm %r0,15,__TI_precount(%r12)
bnz BASED(io_restore) # preemption disabled
- tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
+ tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
bno BASED(io_restore)
# switch to kernel stack
l %r1,SP_R15(%r15)
@@ -645,13 +640,13 @@ io_work_user:
# and _TIF_MCCK_PENDING
#
io_work_tif:
- tm __TI_flags+3(%r9),_TIF_MCCK_PENDING
+ tm __TI_flags+3(%r12),_TIF_MCCK_PENDING
bo BASED(io_mcck_pending)
- tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
+ tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
bo BASED(io_reschedule)
- tm __TI_flags+3(%r9),_TIF_SIGPENDING
+ tm __TI_flags+3(%r12),_TIF_SIGPENDING
bo BASED(io_sigpending)
- tm __TI_flags+3(%r9),_TIF_NOTIFY_RESUME
+ tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME
bo BASED(io_notify_resume)
b BASED(io_return) # beware of critical section cleanup
@@ -711,16 +706,16 @@ io_notify_resume:
ext_int_handler:
stck __LC_INT_CLOCK
stpt __LC_ASYNC_ENTER_TIMER
- SAVE_ALL_BASE __LC_SAVE_AREA+16
SAVE_ALL_ASYNC __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16
- CREATE_STACK_FRAME __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16
+ CREATE_STACK_FRAME __LC_SAVE_AREA+16
+ mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack
+ l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(ext_no_vtime)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
ext_no_vtime:
- l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
la %r2,SP_PTREGS(%r15) # address of register-save area
l %r3,__LC_CPU_ADDRESS # get cpu address + interruption code
@@ -775,7 +770,10 @@ mcck_int_main:
sra %r14,PAGE_SHIFT
be BASED(0f)
l %r15,__LC_PANIC_STACK # load panic stack
-0: CREATE_STACK_FRAME __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32
+0: s %r15,BASED(.Lc_spsize) # make room for registers & psw
+ CREATE_STACK_FRAME __LC_SAVE_AREA+32
+ mvc SP_PSW(8,%r15),0(%r12)
+ l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm __LC_MCCK_CODE+2,0x08 # mwp of old psw valid?
bno BASED(mcck_no_vtime) # no -> skip cleanup critical
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
@@ -784,7 +782,6 @@ mcck_int_main:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_MCCK_ENTER_TIMER
mcck_no_vtime:
- l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
la %r2,SP_PTREGS(%r15) # load pt_regs
l %r1,BASED(.Ls390_mcck)
basr %r14,%r1 # call machine check handler
@@ -796,7 +793,7 @@ mcck_no_vtime:
xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
lr %r15,%r1
stosm __SF_EMPTY(%r15),0x04 # turn dat on
- tm __TI_flags+3(%r9),_TIF_MCCK_PENDING
+ tm __TI_flags+3(%r12),_TIF_MCCK_PENDING
bno BASED(mcck_return)
TRACE_IRQS_OFF
l %r1,BASED(.Ls390_handle_mcck)
@@ -861,6 +858,8 @@ restart_crash:
restart_go:
#endif
+ .section .kprobes.text, "ax"
+
#ifdef CONFIG_CHECK_STACK
/*
* The synchronous or the asynchronous stack overflowed. We are dead.
@@ -943,12 +942,13 @@ cleanup_system_call:
bh BASED(0f)
mvc __LC_SAVE_AREA(16),0(%r12)
0: st %r13,4(%r12)
- st %r12,__LC_SAVE_AREA+48 # argh
- SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
- CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
- l %r12,__LC_SAVE_AREA+48 # argh
+ l %r15,__LC_KERNEL_STACK # problem state -> load ksp
+ s %r15,BASED(.Lc_spsize) # make room for registers & psw
st %r15,12(%r12)
- lh %r7,0x8a
+ CREATE_STACK_FRAME __LC_SAVE_AREA
+ mvc SP_PSW(8,%r15),__LC_SVC_OLD_PSW
+ mvc SP_ILC(4,%r15),__LC_SVC_ILC
+ mvc 0(4,%r12),__LC_THREAD_INFO
cleanup_vtime:
clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+12)
bhe BASED(cleanup_stime)
@@ -1046,7 +1046,7 @@ cleanup_io_restore_insn:
.Ldo_signal: .long do_signal
.Ldo_notify_resume:
.long do_notify_resume
-.Lhandle_per: .long do_single_step
+.Lhandle_per: .long do_per_trap
.Ldo_execve: .long do_execve
.Lexecve_tail: .long execve_tail
.Ljump_table: .long pgm_check_table
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index 95c1dfc4ef3..17a6f83a2d6 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -12,7 +12,7 @@ pgm_check_handler_t do_dat_exception;
extern int sysctl_userprocess_debug;
-void do_single_step(struct pt_regs *regs);
+void do_per_trap(struct pt_regs *regs);
void syscall_trace(struct pt_regs *regs, int entryexit);
void kernel_stack_overflow(struct pt_regs * regs);
void do_signal(struct pt_regs *regs);
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 8f3e802174d..9d3603d6c51 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -51,7 +51,7 @@ STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
STACK_SIZE = 1 << STACK_SHIFT
_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
- _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
+ _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_PER_TRAP )
_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING)
_TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
@@ -197,6 +197,8 @@ _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
ssm __SF_EMPTY(%r15)
.endm
+ .section .kprobes.text, "ax"
+
/*
* Scheduler resume function, called by switch_to
* gpr2 = (task_struct *) prev
@@ -206,30 +208,21 @@ _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
*/
.globl __switch_to
__switch_to:
- tm __THREAD_per+4(%r3),0xe8 # is the new process using per ?
- jz __switch_to_noper # if not we're fine
- stctg %c9,%c11,__SF_EMPTY(%r15)# We are using per stuff
- clc __THREAD_per(24,%r3),__SF_EMPTY(%r15)
- je __switch_to_noper # we got away without bashing TLB's
- lctlg %c9,%c11,__THREAD_per(%r3) # Nope we didn't
-__switch_to_noper:
- lg %r4,__THREAD_info(%r2) # get thread_info of prev
+ lg %r4,__THREAD_info(%r2) # get thread_info of prev
+ lg %r5,__THREAD_info(%r3) # get thread_info of next
tm __TI_flags+7(%r4),_TIF_MCCK_PENDING # machine check pending?
- jz __switch_to_no_mcck
- ni __TI_flags+7(%r4),255-_TIF_MCCK_PENDING # clear flag in prev
- lg %r4,__THREAD_info(%r3) # get thread_info of next
- oi __TI_flags+7(%r4),_TIF_MCCK_PENDING # set it in next
-__switch_to_no_mcck:
- stmg %r6,%r15,__SF_GPRS(%r15)# store __switch_to registers of prev task
- stg %r15,__THREAD_ksp(%r2) # store kernel stack to prev->tss.ksp
- lg %r15,__THREAD_ksp(%r3) # load kernel stack from next->tss.ksp
- lmg %r6,%r15,__SF_GPRS(%r15)# load __switch_to registers of next task
- stg %r3,__LC_CURRENT # __LC_CURRENT = current task struct
- lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
- lg %r3,__THREAD_info(%r3) # load thread_info from task struct
- stg %r3,__LC_THREAD_INFO
- aghi %r3,STACK_SIZE
- stg %r3,__LC_KERNEL_STACK # __LC_KERNEL_STACK = new kernel stack
+ jz 0f
+ ni __TI_flags+7(%r4),255-_TIF_MCCK_PENDING # clear flag in prev
+ oi __TI_flags+7(%r5),_TIF_MCCK_PENDING # set it in next
+0: stmg %r6,%r15,__SF_GPRS(%r15) # store gprs of prev task
+ stg %r15,__THREAD_ksp(%r2) # store kernel stack of prev
+ lg %r15,__THREAD_ksp(%r3) # load kernel stack of next
+ lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
+ lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
+ stg %r3,__LC_CURRENT # store task struct of next
+ stg %r5,__LC_THREAD_INFO # store thread info of next
+ aghi %r5,STACK_SIZE # end of kernel stack of next
+ stg %r5,__LC_KERNEL_STACK # store end of kernel stack
br %r14
__critical_start:
@@ -309,7 +302,7 @@ sysc_work_tif:
jo sysc_notify_resume
tm __TI_flags+7(%r12),_TIF_RESTART_SVC
jo sysc_restart
- tm __TI_flags+7(%r12),_TIF_SINGLE_STEP
+ tm __TI_flags+7(%r12),_TIF_PER_TRAP
jo sysc_singlestep
j sysc_return # beware of critical section cleanup
@@ -331,12 +324,12 @@ sysc_mcck_pending:
# _TIF_SIGPENDING is set, call do_signal
#
sysc_sigpending:
- ni __TI_flags+7(%r12),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
+ ni __TI_flags+7(%r12),255-_TIF_PER_TRAP # clear TIF_PER_TRAP
la %r2,SP_PTREGS(%r15) # load pt_regs
brasl %r14,do_signal # call do_signal
tm __TI_flags+7(%r12),_TIF_RESTART_SVC
jo sysc_restart
- tm __TI_flags+7(%r12),_TIF_SINGLE_STEP
+ tm __TI_flags+7(%r12),_TIF_PER_TRAP
jo sysc_singlestep
j sysc_return
@@ -361,14 +354,14 @@ sysc_restart:
j sysc_nr_ok # restart svc
#
-# _TIF_SINGLE_STEP is set, call do_single_step
+# _TIF_PER_TRAP is set, call do_per_trap
#
sysc_singlestep:
- ni __TI_flags+7(%r12),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
+ ni __TI_flags+7(%r12),255-_TIF_PER_TRAP # clear TIF_PER_TRAP
xc SP_SVCNR(2,%r15),SP_SVCNR(%r15) # clear svc number
la %r2,SP_PTREGS(%r15) # address of register-save area
larl %r14,sysc_return # load adr. of system return
- jg do_single_step # branch to do_sigtrap
+ jg do_per_trap
#
# call tracehook_report_syscall_entry/tracehook_report_syscall_exit before
@@ -524,10 +517,10 @@ pgm_no_vtime2:
lg %r1,__TI_task(%r12)
tm SP_PSW+1(%r15),0x01 # kernel per event ?
jz kernel_per
- mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
- mvc __THREAD_per+__PER_address(8,%r1),__LC_PER_ADDRESS
- mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
- oi __TI_flags+7(%r12),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
+ mvc __THREAD_per_cause(2,%r1),__LC_PER_CAUSE
+ mvc __THREAD_per_address(8,%r1),__LC_PER_ADDRESS
+ mvc __THREAD_per_paid(1,%r1),__LC_PER_PAID
+ oi __TI_flags+7(%r12),_TIF_PER_TRAP # set TIF_PER_TRAP
lgf %r3,__LC_PGM_ILC # load program interruption code
lg %r4,__LC_TRANS_EXC_CODE
REENABLE_IRQS
@@ -556,10 +549,10 @@ pgm_svcper:
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
LAST_BREAK
lg %r8,__TI_task(%r12)
- mvc __THREAD_per+__PER_atmid(2,%r8),__LC_PER_ATMID
- mvc __THREAD_per+__PER_address(8,%r8),__LC_PER_ADDRESS
- mvc __THREAD_per+__PER_access_id(1,%r8),__LC_PER_ACCESS_ID
- oi __TI_flags+7(%r12),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
+ mvc __THREAD_per_cause(2,%r8),__LC_PER_CAUSE
+ mvc __THREAD_per_address(8,%r8),__LC_PER_ADDRESS
+ mvc __THREAD_per_paid(1,%r8),__LC_PER_PAID
+ oi __TI_flags+7(%r12),_TIF_PER_TRAP # set TIF_PER_TRAP
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
lmg %r2,%r6,SP_R2(%r15) # load svc arguments
j sysc_do_svc
@@ -571,7 +564,7 @@ kernel_per:
REENABLE_IRQS
xc SP_SVCNR(2,%r15),SP_SVCNR(%r15) # clear svc number
la %r2,SP_PTREGS(%r15) # address of register-save area
- brasl %r14,do_single_step
+ brasl %r14,do_per_trap
j pgm_exit
/*
@@ -868,6 +861,8 @@ restart_crash:
restart_go:
#endif
+ .section .kprobes.text, "ax"
+
#ifdef CONFIG_CHECK_STACK
/*
* The synchronous or the asynchronous stack overflowed. We are dead.
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index 6a83d058131..78bdf0e5dff 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -4,7 +4,7 @@
* Copyright IBM Corp. 2009
*
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
- *
+ * Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#include <linux/hardirq.h>
@@ -12,176 +12,144 @@
#include <linux/ftrace.h>
#include <linux/kernel.h>
#include <linux/types.h>
+#include <linux/kprobes.h>
#include <trace/syscall.h>
#include <asm/asm-offsets.h>
+#ifdef CONFIG_64BIT
+#define MCOUNT_OFFSET_RET 12
+#else
+#define MCOUNT_OFFSET_RET 22
+#endif
+
#ifdef CONFIG_DYNAMIC_FTRACE
void ftrace_disable_code(void);
-void ftrace_disable_return(void);
-void ftrace_call_code(void);
-void ftrace_nop_code(void);
-
-#define FTRACE_INSN_SIZE 4
+void ftrace_enable_insn(void);
#ifdef CONFIG_64BIT
-
+/*
+ * The 64-bit mcount code looks like this:
+ * stg %r14,8(%r15) # offset 0
+ * > larl %r1,<&counter> # offset 6
+ * > brasl %r14,_mcount # offset 12
+ * lg %r14,8(%r15) # offset 18
+ * Total length is 24 bytes. The middle two instructions of the mcount
+ * block get overwritten by ftrace_make_nop / ftrace_make_call.
+ * The 64-bit enabled ftrace code block looks like this:
+ * stg %r14,8(%r15) # offset 0
+ * > lg %r1,__LC_FTRACE_FUNC # offset 6
+ * > lgr %r0,%r0 # offset 12
+ * > basr %r14,%r1 # offset 16
+ * lg %r14,8(%15) # offset 18
+ * The return points of the mcount/ftrace function have the same offset 18.
+ * The 64-bit disable ftrace code block looks like this:
+ * stg %r14,8(%r15) # offset 0
+ * > jg .+18 # offset 6
+ * > lgr %r0,%r0 # offset 12
+ * > basr %r14,%r1 # offset 16
+ * lg %r14,8(%15) # offset 18
+ * The jg instruction branches to offset 24 to skip as many instructions
+ * as possible.
+ */
asm(
" .align 4\n"
"ftrace_disable_code:\n"
- " j 0f\n"
- " .word 0x0024\n"
- " lg %r1,"__stringify(__LC_FTRACE_FUNC)"\n"
- " basr %r14,%r1\n"
- "ftrace_disable_return:\n"
- " lg %r14,8(15)\n"
+ " jg 0f\n"
" lgr %r0,%r0\n"
- "0:\n");
-
-asm(
+ " basr %r14,%r1\n"
+ "0:\n"
" .align 4\n"
- "ftrace_nop_code:\n"
- " j .+"__stringify(MCOUNT_INSN_SIZE)"\n");
+ "ftrace_enable_insn:\n"
+ " lg %r1,"__stringify(__LC_FTRACE_FUNC)"\n");
-asm(
- " .align 4\n"
- "ftrace_call_code:\n"
- " stg %r14,8(%r15)\n");
+#define FTRACE_INSN_SIZE 6
#else /* CONFIG_64BIT */
-
+/*
+ * The 31-bit mcount code looks like this:
+ * st %r14,4(%r15) # offset 0
+ * > bras %r1,0f # offset 4
+ * > .long _mcount # offset 8
+ * > .long <&counter> # offset 12
+ * > 0: l %r14,0(%r1) # offset 16
+ * > l %r1,4(%r1) # offset 20
+ * basr %r14,%r14 # offset 24
+ * l %r14,4(%r15) # offset 26
+ * Total length is 30 bytes. The twenty bytes starting from offset 4
+ * to offset 24 get overwritten by ftrace_make_nop / ftrace_make_call.
+ * The 31-bit enabled ftrace code block looks like this:
+ * st %r14,4(%r15) # offset 0
+ * > l %r14,__LC_FTRACE_FUNC # offset 4
+ * > j 0f # offset 8
+ * > .fill 12,1,0x07 # offset 12
+ * 0: basr %r14,%r14 # offset 24
+ * l %r14,4(%r14) # offset 26
+ * The return points of the mcount/ftrace function have the same offset 26.
+ * The 31-bit disabled ftrace code block looks like this:
+ * st %r14,4(%r15) # offset 0
+ * > j .+26 # offset 4
+ * > j 0f # offset 8
+ * > .fill 12,1,0x07 # offset 12
+ * 0: basr %r14,%r14 # offset 24
+ * l %r14,4(%r14) # offset 26
+ * The j instruction branches to offset 30 to skip as many instructions
+ * as possible.
+ */
asm(
" .align 4\n"
"ftrace_disable_code:\n"
+ " j 1f\n"
" j 0f\n"
- " l %r1,"__stringify(__LC_FTRACE_FUNC)"\n"
- " basr %r14,%r1\n"
- "ftrace_disable_return:\n"
- " l %r14,4(%r15)\n"
- " j 0f\n"
- " bcr 0,%r7\n"
- " bcr 0,%r7\n"
- " bcr 0,%r7\n"
- " bcr 0,%r7\n"
- " bcr 0,%r7\n"
- " bcr 0,%r7\n"
- "0:\n");
-
-asm(
+ " .fill 12,1,0x07\n"
+ "0: basr %r14,%r14\n"
+ "1:\n"
" .align 4\n"
- "ftrace_nop_code:\n"
- " j .+"__stringify(MCOUNT_INSN_SIZE)"\n");
+ "ftrace_enable_insn:\n"
+ " l %r14,"__stringify(__LC_FTRACE_FUNC)"\n");
-asm(
- " .align 4\n"
- "ftrace_call_code:\n"
- " st %r14,4(%r15)\n");
+#define FTRACE_INSN_SIZE 4
#endif /* CONFIG_64BIT */
-static int ftrace_modify_code(unsigned long ip,
- void *old_code, int old_size,
- void *new_code, int new_size)
-{
- unsigned char replaced[MCOUNT_INSN_SIZE];
-
- /*
- * Note: Due to modules code can disappear and change.
- * We need to protect against faulting as well as code
- * changing. We do this by using the probe_kernel_*
- * functions.
- * This however is just a simple sanity check.
- */
- if (probe_kernel_read(replaced, (void *)ip, old_size))
- return -EFAULT;
- if (memcmp(replaced, old_code, old_size) != 0)
- return -EINVAL;
- if (probe_kernel_write((void *)ip, new_code, new_size))
- return -EPERM;
- return 0;
-}
-
-static int ftrace_make_initial_nop(struct module *mod, struct dyn_ftrace *rec,
- unsigned long addr)
-{
- return ftrace_modify_code(rec->ip,
- ftrace_call_code, FTRACE_INSN_SIZE,
- ftrace_disable_code, MCOUNT_INSN_SIZE);
-}
int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
unsigned long addr)
{
- if (addr == MCOUNT_ADDR)
- return ftrace_make_initial_nop(mod, rec, addr);
- return ftrace_modify_code(rec->ip,
- ftrace_call_code, FTRACE_INSN_SIZE,
- ftrace_nop_code, FTRACE_INSN_SIZE);
+ if (probe_kernel_write((void *) rec->ip, ftrace_disable_code,
+ MCOUNT_INSN_SIZE))
+ return -EPERM;
+ return 0;
}
int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
{
- return ftrace_modify_code(rec->ip,
- ftrace_nop_code, FTRACE_INSN_SIZE,
- ftrace_call_code, FTRACE_INSN_SIZE);
+ if (probe_kernel_write((void *) rec->ip, ftrace_enable_insn,
+ FTRACE_INSN_SIZE))
+ return -EPERM;
+ return 0;
}
int ftrace_update_ftrace_func(ftrace_func_t func)
{
- ftrace_dyn_func = (unsigned long)func;
return 0;
}
int __init ftrace_dyn_arch_init(void *data)
{
- *(unsigned long *)data = 0;
+ *(unsigned long *) data = 0;
return 0;
}
#endif /* CONFIG_DYNAMIC_FTRACE */
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
-#ifdef CONFIG_DYNAMIC_FTRACE
-/*
- * Patch the kernel code at ftrace_graph_caller location:
- * The instruction there is branch relative on condition. The condition mask
- * is either all ones (always branch aka disable ftrace_graph_caller) or all
- * zeroes (nop aka enable ftrace_graph_caller).
- * Instruction format for brc is a7m4xxxx where m is the condition mask.
- */
-int ftrace_enable_ftrace_graph_caller(void)
-{
- unsigned short opcode = 0xa704;
-
- return probe_kernel_write(ftrace_graph_caller, &opcode, sizeof(opcode));
-}
-
-int ftrace_disable_ftrace_graph_caller(void)
-{
- unsigned short opcode = 0xa7f4;
-
- return probe_kernel_write(ftrace_graph_caller, &opcode, sizeof(opcode));
-}
-
-static inline unsigned long ftrace_mcount_call_adjust(unsigned long addr)
-{
- return addr - (ftrace_disable_return - ftrace_disable_code);
-}
-
-#else /* CONFIG_DYNAMIC_FTRACE */
-
-static inline unsigned long ftrace_mcount_call_adjust(unsigned long addr)
-{
- return addr - MCOUNT_OFFSET_RET;
-}
-
-#endif /* CONFIG_DYNAMIC_FTRACE */
-
/*
* Hook the return address and push it in the stack of return addresses
* in current thread info.
*/
-unsigned long prepare_ftrace_return(unsigned long ip, unsigned long parent)
+unsigned long __kprobes prepare_ftrace_return(unsigned long parent,
+ unsigned long ip)
{
struct ftrace_graph_ent trace;
@@ -189,14 +157,42 @@ unsigned long prepare_ftrace_return(unsigned long ip, unsigned long parent)
goto out;
if (ftrace_push_return_trace(parent, ip, &trace.depth, 0) == -EBUSY)
goto out;
- trace.func = ftrace_mcount_call_adjust(ip) & PSW_ADDR_INSN;
+ trace.func = (ip & PSW_ADDR_INSN) - MCOUNT_OFFSET_RET;
/* Only trace if the calling function expects to. */
if (!ftrace_graph_entry(&trace)) {
current->curr_ret_stack--;
goto out;
}
- parent = (unsigned long)return_to_handler;
+ parent = (unsigned long) return_to_handler;
out:
return parent;
}
+
+#ifdef CONFIG_DYNAMIC_FTRACE
+/*
+ * Patch the kernel code at ftrace_graph_caller location. The instruction
+ * there is branch relative and save to prepare_ftrace_return. To disable
+ * the call to prepare_ftrace_return we patch the bras offset to point
+ * directly after the instructions. To enable the call we calculate
+ * the original offset to prepare_ftrace_return and put it back.
+ */
+int ftrace_enable_ftrace_graph_caller(void)
+{
+ unsigned short offset;
+
+ offset = ((void *) prepare_ftrace_return -
+ (void *) ftrace_graph_caller) / 2;
+ return probe_kernel_write(ftrace_graph_caller + 2,
+ &offset, sizeof(offset));
+}
+
+int ftrace_disable_ftrace_graph_caller(void)
+{
+ static unsigned short offset = 0x0002;
+
+ return probe_kernel_write(ftrace_graph_caller + 2,
+ &offset, sizeof(offset));
+}
+
+#endif /* CONFIG_DYNAMIC_FTRACE */
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index 026a37a94fc..ea5099c9709 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -1,7 +1,5 @@
/*
- * arch/s390/kernel/irq.c
- *
- * Copyright IBM Corp. 2004,2007
+ * Copyright IBM Corp. 2004,2010
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
* Thomas Spatzier (tspat@de.ibm.com)
*
@@ -17,12 +15,42 @@
#include <linux/proc_fs.h>
#include <linux/profile.h>
+struct irq_class {
+ char *name;
+ char *desc;
+};
+
+static const struct irq_class intrclass_names[] = {
+ {.name = "EXT" },
+ {.name = "I/O" },
+ {.name = "CLK", .desc = "[EXT] Clock Comparator" },
+ {.name = "IPI", .desc = "[EXT] Signal Processor" },
+ {.name = "TMR", .desc = "[EXT] CPU Timer" },
+ {.name = "TAL", .desc = "[EXT] Timing Alert" },
+ {.name = "PFL", .desc = "[EXT] Pseudo Page Fault" },
+ {.name = "DSD", .desc = "[EXT] DASD Diag" },
+ {.name = "VRT", .desc = "[EXT] Virtio" },
+ {.name = "SCP", .desc = "[EXT] Service Call" },
+ {.name = "IUC", .desc = "[EXT] IUCV" },
+ {.name = "QAI", .desc = "[I/O] QDIO Adapter Interrupt" },
+ {.name = "QDI", .desc = "[I/O] QDIO Interrupt" },
+ {.name = "DAS", .desc = "[I/O] DASD" },
+ {.name = "C15", .desc = "[I/O] 3215" },
+ {.name = "C70", .desc = "[I/O] 3270" },
+ {.name = "TAP", .desc = "[I/O] Tape" },
+ {.name = "VMR", .desc = "[I/O] Unit Record Devices" },
+ {.name = "LCS", .desc = "[I/O] LCS" },
+ {.name = "CLW", .desc = "[I/O] CLAW" },
+ {.name = "CTC", .desc = "[I/O] CTC" },
+ {.name = "APB", .desc = "[I/O] AP Bus" },
+ {.name = "NMI", .desc = "[NMI] Machine Check" },
+};
+
/*
* show_interrupts is needed by /proc/interrupts.
*/
int show_interrupts(struct seq_file *p, void *v)
{
- static const char *intrclass_names[] = { "EXT", "I/O", };
int i = *(loff_t *) v, j;
get_online_cpus();
@@ -34,15 +62,16 @@ int show_interrupts(struct seq_file *p, void *v)
}
if (i < NR_IRQS) {
- seq_printf(p, "%s: ", intrclass_names[i]);
+ seq_printf(p, "%s: ", intrclass_names[i].name);
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
+ if (intrclass_names[i].desc)
+ seq_printf(p, " %s", intrclass_names[i].desc);
seq_putc(p, '\n');
-
}
put_online_cpus();
return 0;
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index 2564793ec2b..1d05d669107 100644
--- a/arch/s390/kernel/kprobes.c
+++ b/arch/s390/kernel/kprobes.c
@@ -32,34 +32,14 @@
#include <linux/slab.h>
#include <linux/hardirq.h>
-DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL;
+DEFINE_PER_CPU(struct kprobe *, current_kprobe);
DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
-struct kretprobe_blackpoint kretprobe_blacklist[] = {{NULL, NULL}};
+struct kretprobe_blackpoint kretprobe_blacklist[] = { };
-int __kprobes arch_prepare_kprobe(struct kprobe *p)
-{
- /* Make sure the probe isn't going on a difficult instruction */
- if (is_prohibited_opcode((kprobe_opcode_t *) p->addr))
- return -EINVAL;
-
- if ((unsigned long)p->addr & 0x01)
- return -EINVAL;
-
- /* Use the get_insn_slot() facility for correctness */
- if (!(p->ainsn.insn = get_insn_slot()))
- return -ENOMEM;
-
- memcpy(p->ainsn.insn, p->addr, MAX_INSN_SIZE * sizeof(kprobe_opcode_t));
-
- get_instruction_type(&p->ainsn);
- p->opcode = *p->addr;
- return 0;
-}
-
-int __kprobes is_prohibited_opcode(kprobe_opcode_t *instruction)
+static int __kprobes is_prohibited_opcode(kprobe_opcode_t *insn)
{
- switch (*(__u8 *) instruction) {
+ switch (insn[0] >> 8) {
case 0x0c: /* bassm */
case 0x0b: /* bsm */
case 0x83: /* diag */
@@ -68,7 +48,7 @@ int __kprobes is_prohibited_opcode(kprobe_opcode_t *instruction)
case 0xad: /* stosm */
return -EINVAL;
}
- switch (*(__u16 *) instruction) {
+ switch (insn[0]) {
case 0x0101: /* pr */
case 0xb25a: /* bsa */
case 0xb240: /* bakr */
@@ -81,93 +61,92 @@ int __kprobes is_prohibited_opcode(kprobe_opcode_t *instruction)
return 0;
}
-void __kprobes get_instruction_type(struct arch_specific_insn *ainsn)
+static int __kprobes get_fixup_type(kprobe_opcode_t *insn)
{
/* default fixup method */
- ainsn->fixup = FIXUP_PSW_NORMAL;
-
- /* save r1 operand */
- ainsn->reg = (*ainsn->insn & 0xf0) >> 4;
+ int fixup = FIXUP_PSW_NORMAL;
- /* save the instruction length (pop 5-5) in bytes */
- switch (*(__u8 *) (ainsn->insn) >> 6) {
- case 0:
- ainsn->ilen = 2;
- break;
- case 1:
- case 2:
- ainsn->ilen = 4;
- break;
- case 3:
- ainsn->ilen = 6;
- break;
- }
-
- switch (*(__u8 *) ainsn->insn) {
+ switch (insn[0] >> 8) {
case 0x05: /* balr */
case 0x0d: /* basr */
- ainsn->fixup = FIXUP_RETURN_REGISTER;
+ fixup = FIXUP_RETURN_REGISTER;
/* if r2 = 0, no branch will be taken */
- if ((*ainsn->insn & 0x0f) == 0)
- ainsn->fixup |= FIXUP_BRANCH_NOT_TAKEN;
+ if ((insn[0] & 0x0f) == 0)
+ fixup |= FIXUP_BRANCH_NOT_TAKEN;
break;
case 0x06: /* bctr */
case 0x07: /* bcr */
- ainsn->fixup = FIXUP_BRANCH_NOT_TAKEN;
+ fixup = FIXUP_BRANCH_NOT_TAKEN;
break;
case 0x45: /* bal */
case 0x4d: /* bas */
- ainsn->fixup = FIXUP_RETURN_REGISTER;
+ fixup = FIXUP_RETURN_REGISTER;
break;
case 0x47: /* bc */
case 0x46: /* bct */
case 0x86: /* bxh */
case 0x87: /* bxle */
- ainsn->fixup = FIXUP_BRANCH_NOT_TAKEN;
+ fixup = FIXUP_BRANCH_NOT_TAKEN;
break;
case 0x82: /* lpsw */
- ainsn->fixup = FIXUP_NOT_REQUIRED;
+ fixup = FIXUP_NOT_REQUIRED;
break;
case 0xb2: /* lpswe */
- if (*(((__u8 *) ainsn->insn) + 1) == 0xb2) {
- ainsn->fixup = FIXUP_NOT_REQUIRED;
- }
+ if ((insn[0] & 0xff) == 0xb2)
+ fixup = FIXUP_NOT_REQUIRED;
break;
case 0xa7: /* bras */
- if ((*ainsn->insn & 0x0f) == 0x05) {
- ainsn->fixup |= FIXUP_RETURN_REGISTER;
- }
+ if ((insn[0] & 0x0f) == 0x05)
+ fixup |= FIXUP_RETURN_REGISTER;
break;
case 0xc0:
- if ((*ainsn->insn & 0x0f) == 0x00 /* larl */
- || (*ainsn->insn & 0x0f) == 0x05) /* brasl */
- ainsn->fixup |= FIXUP_RETURN_REGISTER;
+ if ((insn[0] & 0x0f) == 0x00 || /* larl */
+ (insn[0] & 0x0f) == 0x05) /* brasl */
+ fixup |= FIXUP_RETURN_REGISTER;
break;
case 0xeb:
- if (*(((__u8 *) ainsn->insn) + 5 ) == 0x44 || /* bxhg */
- *(((__u8 *) ainsn->insn) + 5) == 0x45) {/* bxleg */
- ainsn->fixup = FIXUP_BRANCH_NOT_TAKEN;
- }
+ if ((insn[2] & 0xff) == 0x44 || /* bxhg */
+ (insn[2] & 0xff) == 0x45) /* bxleg */
+ fixup = FIXUP_BRANCH_NOT_TAKEN;
break;
case 0xe3: /* bctg */
- if (*(((__u8 *) ainsn->insn) + 5) == 0x46) {
- ainsn->fixup = FIXUP_BRANCH_NOT_TAKEN;
- }
+ if ((insn[2] & 0xff) == 0x46)
+ fixup = FIXUP_BRANCH_NOT_TAKEN;
break;
}
+ return fixup;
+}
+
+int __kprobes arch_prepare_kprobe(struct kprobe *p)
+{
+ if ((unsigned long) p->addr & 0x01)
+ return -EINVAL;
+
+ /* Make sure the probe isn't going on a difficult instruction */
+ if (is_prohibited_opcode(p->addr))
+ return -EINVAL;
+
+ p->opcode = *p->addr;
+ memcpy(p->ainsn.insn, p->addr, ((p->opcode >> 14) + 3) & -2);
+
+ return 0;
}
+struct ins_replace_args {
+ kprobe_opcode_t *ptr;
+ kprobe_opcode_t opcode;
+};
+
static int __kprobes swap_instruction(void *aref)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
unsigned long status = kcb->kprobe_status;
struct ins_replace_args *args = aref;
- int rc;
kcb->kprobe_status = KPROBE_SWAP_INST;
- rc = probe_kernel_write(args->ptr, &args->new, sizeof(args->new));
+ probe_kernel_write(args->ptr, &args->opcode, sizeof(args->opcode));
kcb->kprobe_status = status;
- return rc;
+ return 0;
}
void __kprobes arch_arm_kprobe(struct kprobe *p)
@@ -175,8 +154,7 @@ void __kprobes arch_arm_kprobe(struct kprobe *p)
struct ins_replace_args args;
args.ptr = p->addr;
- args.old = p->opcode;
- args.new = BREAKPOINT_INSTRUCTION;
+ args.opcode = BREAKPOINT_INSTRUCTION;
stop_machine(swap_instruction, &args, NULL);
}
@@ -185,64 +163,69 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p)
struct ins_replace_args args;
args.ptr = p->addr;
- args.old = BREAKPOINT_INSTRUCTION;
- args.new = p->opcode;
+ args.opcode = p->opcode;
stop_machine(swap_instruction, &args, NULL);
}
void __kprobes arch_remove_kprobe(struct kprobe *p)
{
- if (p->ainsn.insn) {
- free_insn_slot(p->ainsn.insn, 0);
- p->ainsn.insn = NULL;
- }
}
-static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
+static void __kprobes enable_singlestep(struct kprobe_ctlblk *kcb,
+ struct pt_regs *regs,
+ unsigned long ip)
{
- per_cr_bits kprobe_per_regs[1];
+ struct per_regs per_kprobe;
- memset(kprobe_per_regs, 0, sizeof(per_cr_bits));
- regs->psw.addr = (unsigned long)p->ainsn.insn | PSW_ADDR_AMODE;
+ /* Set up the PER control registers %cr9-%cr11 */
+ per_kprobe.control = PER_EVENT_IFETCH;
+ per_kprobe.start = ip;
+ per_kprobe.end = ip;
- /* Set up the per control reg info, will pass to lctl */
- kprobe_per_regs[0].em_instruction_fetch = 1;
- kprobe_per_regs[0].starting_addr = (unsigned long)p->ainsn.insn;
- kprobe_per_regs[0].ending_addr = (unsigned long)p->ainsn.insn + 1;
+ /* Save control regs and psw mask */
+ __ctl_store(kcb->kprobe_saved_ctl, 9, 11);
+ kcb->kprobe_saved_imask = regs->psw.mask &
+ (PSW_MASK_PER | PSW_MASK_IO | PSW_MASK_EXT);
- /* Set the PER control regs, turns on single step for this address */
- __ctl_load(kprobe_per_regs, 9, 11);
+ /* Set PER control regs, turns on single step for the given address */
+ __ctl_load(per_kprobe, 9, 11);
regs->psw.mask |= PSW_MASK_PER;
regs->psw.mask &= ~(PSW_MASK_IO | PSW_MASK_EXT);
+ regs->psw.addr = ip | PSW_ADDR_AMODE;
}
-static void __kprobes save_previous_kprobe(struct kprobe_ctlblk *kcb)
+static void __kprobes disable_singlestep(struct kprobe_ctlblk *kcb,
+ struct pt_regs *regs,
+ unsigned long ip)
{
- kcb->prev_kprobe.kp = kprobe_running();
- kcb->prev_kprobe.status = kcb->kprobe_status;
- kcb->prev_kprobe.kprobe_saved_imask = kcb->kprobe_saved_imask;
- memcpy(kcb->prev_kprobe.kprobe_saved_ctl, kcb->kprobe_saved_ctl,
- sizeof(kcb->kprobe_saved_ctl));
+ /* Restore control regs and psw mask, set new psw address */
+ __ctl_load(kcb->kprobe_saved_ctl, 9, 11);
+ regs->psw.mask &= ~PSW_MASK_PER;
+ regs->psw.mask |= kcb->kprobe_saved_imask;
+ regs->psw.addr = ip | PSW_ADDR_AMODE;
}
-static void __kprobes restore_previous_kprobe(struct kprobe_ctlblk *kcb)
+/*
+ * Activate a kprobe by storing its pointer to current_kprobe. The
+ * previous kprobe is stored in kcb->prev_kprobe. A stack of up to
+ * two kprobes can be active, see KPROBE_REENTER.
+ */
+static void __kprobes push_kprobe(struct kprobe_ctlblk *kcb, struct kprobe *p)
{
- __get_cpu_var(current_kprobe) = kcb->prev_kprobe.kp;
- kcb->kprobe_status = kcb->prev_kprobe.status;
- kcb->kprobe_saved_imask = kcb->prev_kprobe.kprobe_saved_imask;
- memcpy(kcb->kprobe_saved_ctl, kcb->prev_kprobe.kprobe_saved_ctl,
- sizeof(kcb->kprobe_saved_ctl));
+ kcb->prev_kprobe.kp = __get_cpu_var(current_kprobe);
+ kcb->prev_kprobe.status = kcb->kprobe_status;
+ __get_cpu_var(current_kprobe) = p;
}
-static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
- struct kprobe_ctlblk *kcb)
+/*
+ * Deactivate a kprobe by backing up to the previous state. If the
+ * current state is KPROBE_REENTER prev_kprobe.kp will be non-NULL,
+ * for any other state prev_kprobe.kp will be NULL.
+ */
+static void __kprobes pop_kprobe(struct kprobe_ctlblk *kcb)
{
- __get_cpu_var(current_kprobe) = p;
- /* Save the interrupt and per flags */
- kcb->kprobe_saved_imask = regs->psw.mask &
- (PSW_MASK_PER | PSW_MASK_IO | PSW_MASK_EXT);
- /* Save the control regs that govern PER */
- __ctl_store(kcb->kprobe_saved_ctl, 9, 11);
+ __get_cpu_var(current_kprobe) = kcb->prev_kprobe.kp;
+ kcb->kprobe_status = kcb->prev_kprobe.status;
}
void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
@@ -251,79 +234,104 @@ void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
ri->ret_addr = (kprobe_opcode_t *) regs->gprs[14];
/* Replace the return addr with trampoline addr */
- regs->gprs[14] = (unsigned long)&kretprobe_trampoline;
+ regs->gprs[14] = (unsigned long) &kretprobe_trampoline;
+}
+
+static void __kprobes kprobe_reenter_check(struct kprobe_ctlblk *kcb,
+ struct kprobe *p)
+{
+ switch (kcb->kprobe_status) {
+ case KPROBE_HIT_SSDONE:
+ case KPROBE_HIT_ACTIVE:
+ kprobes_inc_nmissed_count(p);
+ break;
+ case KPROBE_HIT_SS:
+ case KPROBE_REENTER:
+ default:
+ /*
+ * A kprobe on the code path to single step an instruction
+ * is a BUG. The code path resides in the .kprobes.text
+ * section and is executed with interrupts disabled.
+ */
+ printk(KERN_EMERG "Invalid kprobe detected at %p.\n", p->addr);
+ dump_kprobe(p);
+ BUG();
+ }
}
static int __kprobes kprobe_handler(struct pt_regs *regs)
{
- struct kprobe *p;
- int ret = 0;
- unsigned long *addr = (unsigned long *)
- ((regs->psw.addr & PSW_ADDR_INSN) - 2);
struct kprobe_ctlblk *kcb;
+ struct kprobe *p;
/*
- * We don't want to be preempted for the entire
- * duration of kprobe processing
+ * We want to disable preemption for the entire duration of kprobe
+ * processing. That includes the calls to the pre/post handlers
+ * and single stepping the kprobe instruction.
*/
preempt_disable();
kcb = get_kprobe_ctlblk();
+ p = get_kprobe((void *)((regs->psw.addr & PSW_ADDR_INSN) - 2));
- /* Check we're not actually recursing */
- if (kprobe_running()) {
- p = get_kprobe(addr);
- if (p) {
- if (kcb->kprobe_status == KPROBE_HIT_SS &&
- *p->ainsn.insn == BREAKPOINT_INSTRUCTION) {
- regs->psw.mask &= ~PSW_MASK_PER;
- regs->psw.mask |= kcb->kprobe_saved_imask;
- goto no_kprobe;
- }
- /* We have reentered the kprobe_handler(), since
- * another probe was hit while within the handler.
- * We here save the original kprobes variables and
- * just single step on the instruction of the new probe
- * without calling any user handlers.
+ if (p) {
+ if (kprobe_running()) {
+ /*
+ * We have hit a kprobe while another is still
+ * active. This can happen in the pre and post
+ * handler. Single step the instruction of the
+ * new probe but do not call any handler function
+ * of this secondary kprobe.
+ * push_kprobe and pop_kprobe saves and restores
+ * the currently active kprobe.
*/
- save_previous_kprobe(kcb);
- set_current_kprobe(p, regs, kcb);
- kprobes_inc_nmissed_count(p);
- prepare_singlestep(p, regs);
+ kprobe_reenter_check(kcb, p);
+ push_kprobe(kcb, p);
kcb->kprobe_status = KPROBE_REENTER;
- return 1;
} else {
- p = __get_cpu_var(current_kprobe);
- if (p->break_handler && p->break_handler(p, regs)) {
- goto ss_probe;
- }
+ /*
+ * If we have no pre-handler or it returned 0, we
+ * continue with single stepping. If we have a
+ * pre-handler and it returned non-zero, it prepped
+ * for calling the break_handler below on re-entry
+ * for jprobe processing, so get out doing nothing
+ * more here.
+ */
+ push_kprobe(kcb, p);
+ kcb->kprobe_status = KPROBE_HIT_ACTIVE;
+ if (p->pre_handler && p->pre_handler(p, regs))
+ return 1;
+ kcb->kprobe_status = KPROBE_HIT_SS;
}
- goto no_kprobe;
- }
-
- p = get_kprobe(addr);
- if (!p)
- /*
- * No kprobe at this address. The fault has not been
- * caused by a kprobe breakpoint. The race of breakpoint
- * vs. kprobe remove does not exist because on s390 we
- * use stop_machine to arm/disarm the breakpoints.
- */
- goto no_kprobe;
-
- kcb->kprobe_status = KPROBE_HIT_ACTIVE;
- set_current_kprobe(p, regs, kcb);
- if (p->pre_handler && p->pre_handler(p, regs))
- /* handler has already set things up, so skip ss setup */
+ enable_singlestep(kcb, regs, (unsigned long) p->ainsn.insn);
return 1;
-
-ss_probe:
- prepare_singlestep(p, regs);
- kcb->kprobe_status = KPROBE_HIT_SS;
- return 1;
-
-no_kprobe:
+ } else if (kprobe_running()) {
+ p = __get_cpu_var(current_kprobe);
+ if (p->break_handler && p->break_handler(p, regs)) {
+ /*
+ * Continuation after the jprobe completed and
+ * caused the jprobe_return trap. The jprobe
+ * break_handler "returns" to the original
+ * function that still has the kprobe breakpoint
+ * installed. We continue with single stepping.
+ */
+ kcb->kprobe_status = KPROBE_HIT_SS;
+ enable_singlestep(kcb, regs,
+ (unsigned long) p->ainsn.insn);
+ return 1;
+ } /* else:
+ * No kprobe at this address and the current kprobe
+ * has no break handler (no jprobe!). The kernel just
+ * exploded, let the standard trap handler pick up the
+ * pieces.
+ */
+ } /* else:
+ * No kprobe at this address and no active kprobe. The trap has
+ * not been caused by a kprobe breakpoint. The race of breakpoint
+ * vs. kprobe remove does not exist because on s390 as we use
+ * stop_machine to arm/disarm the breakpoints.
+ */
preempt_enable_no_resched();
- return ret;
+ return 0;
}
/*
@@ -344,12 +352,12 @@ static void __used kretprobe_trampoline_holder(void)
static int __kprobes trampoline_probe_handler(struct kprobe *p,
struct pt_regs *regs)
{
- struct kretprobe_instance *ri = NULL;
+ struct kretprobe_instance *ri;
struct hlist_head *head, empty_rp;
struct hlist_node *node, *tmp;
- unsigned long flags, orig_ret_address = 0;
- unsigned long trampoline_address = (unsigned long)&kretprobe_trampoline;
- kprobe_opcode_t *correct_ret_addr = NULL;
+ unsigned long flags, orig_ret_address;
+ unsigned long trampoline_address;
+ kprobe_opcode_t *correct_ret_addr;
INIT_HLIST_HEAD(&empty_rp);
kretprobe_hash_lock(current, &head, &flags);
@@ -367,12 +375,16 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
* real return address, and all the rest will point to
* kretprobe_trampoline
*/
+ ri = NULL;
+ orig_ret_address = 0;
+ correct_ret_addr = NULL;
+ trampoline_address = (unsigned long) &kretprobe_trampoline;
hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
if (ri->task != current)
/* another task is sharing our hash bucket */
continue;
- orig_ret_address = (unsigned long)ri->ret_addr;
+ orig_ret_address = (unsigned long) ri->ret_addr;
if (orig_ret_address != trampoline_address)
/*
@@ -391,7 +403,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
/* another task is sharing our hash bucket */
continue;
- orig_ret_address = (unsigned long)ri->ret_addr;
+ orig_ret_address = (unsigned long) ri->ret_addr;
if (ri->rp && ri->rp->handler) {
ri->ret_addr = correct_ret_addr;
@@ -400,19 +412,18 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
recycle_rp_inst(ri, &empty_rp);
- if (orig_ret_address != trampoline_address) {
+ if (orig_ret_address != trampoline_address)
/*
* This is the real return address. Any other
* instances associated with this task are for
* other calls deeper on the call stack
*/
break;
- }
}
regs->psw.addr = orig_ret_address | PSW_ADDR_AMODE;
- reset_current_kprobe();
+ pop_kprobe(get_kprobe_ctlblk());
kretprobe_hash_unlock(current, &flags);
preempt_enable_no_resched();
@@ -439,55 +450,42 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
static void __kprobes resume_execution(struct kprobe *p, struct pt_regs *regs)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
+ unsigned long ip = regs->psw.addr & PSW_ADDR_INSN;
+ int fixup = get_fixup_type(p->ainsn.insn);
- regs->psw.addr &= PSW_ADDR_INSN;
-
- if (p->ainsn.fixup & FIXUP_PSW_NORMAL)
- regs->psw.addr = (unsigned long)p->addr +
- ((unsigned long)regs->psw.addr -
- (unsigned long)p->ainsn.insn);
+ if (fixup & FIXUP_PSW_NORMAL)
+ ip += (unsigned long) p->addr - (unsigned long) p->ainsn.insn;
- if (p->ainsn.fixup & FIXUP_BRANCH_NOT_TAKEN)
- if ((unsigned long)regs->psw.addr -
- (unsigned long)p->ainsn.insn == p->ainsn.ilen)
- regs->psw.addr = (unsigned long)p->addr + p->ainsn.ilen;
+ if (fixup & FIXUP_BRANCH_NOT_TAKEN) {
+ int ilen = ((p->ainsn.insn[0] >> 14) + 3) & -2;
+ if (ip - (unsigned long) p->ainsn.insn == ilen)
+ ip = (unsigned long) p->addr + ilen;
+ }
- if (p->ainsn.fixup & FIXUP_RETURN_REGISTER)
- regs->gprs[p->ainsn.reg] = ((unsigned long)p->addr +
- (regs->gprs[p->ainsn.reg] -
- (unsigned long)p->ainsn.insn))
- | PSW_ADDR_AMODE;
+ if (fixup & FIXUP_RETURN_REGISTER) {
+ int reg = (p->ainsn.insn[0] & 0xf0) >> 4;
+ regs->gprs[reg] += (unsigned long) p->addr -
+ (unsigned long) p->ainsn.insn;
+ }
- regs->psw.addr |= PSW_ADDR_AMODE;
- /* turn off PER mode */
- regs->psw.mask &= ~PSW_MASK_PER;
- /* Restore the original per control regs */
- __ctl_load(kcb->kprobe_saved_ctl, 9, 11);
- regs->psw.mask |= kcb->kprobe_saved_imask;
+ disable_singlestep(kcb, regs, ip);
}
static int __kprobes post_kprobe_handler(struct pt_regs *regs)
{
- struct kprobe *cur = kprobe_running();
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
+ struct kprobe *p = kprobe_running();
- if (!cur)
+ if (!p)
return 0;
- if ((kcb->kprobe_status != KPROBE_REENTER) && cur->post_handler) {
+ if (kcb->kprobe_status != KPROBE_REENTER && p->post_handler) {
kcb->kprobe_status = KPROBE_HIT_SSDONE;
- cur->post_handler(cur, regs, 0);
+ p->post_handler(p, regs, 0);
}
- resume_execution(cur, regs);
-
- /*Restore back the original saved kprobes variables and continue. */
- if (kcb->kprobe_status == KPROBE_REENTER) {
- restore_previous_kprobe(kcb);
- goto out;
- }
- reset_current_kprobe();
-out:
+ resume_execution(p, regs);
+ pop_kprobe(kcb);
preempt_enable_no_resched();
/*
@@ -495,17 +493,16 @@ out:
* will have PER set, in which case, continue the remaining processing
* of do_single_step, as if this is not a probe hit.
*/
- if (regs->psw.mask & PSW_MASK_PER) {
+ if (regs->psw.mask & PSW_MASK_PER)
return 0;
- }
return 1;
}
static int __kprobes kprobe_trap_handler(struct pt_regs *regs, int trapnr)
{
- struct kprobe *cur = kprobe_running();
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
+ struct kprobe *p = kprobe_running();
const struct exception_table_entry *entry;
switch(kcb->kprobe_status) {
@@ -521,14 +518,8 @@ static int __kprobes kprobe_trap_handler(struct pt_regs *regs, int trapnr)
* and allow the page fault handler to continue as a
* normal page fault.
*/
- regs->psw.addr = (unsigned long)cur->addr | PSW_ADDR_AMODE;
- regs->psw.mask &= ~PSW_MASK_PER;
- regs->psw.mask |= kcb->kprobe_saved_imask;
- if (kcb->kprobe_status == KPROBE_REENTER)
- restore_previous_kprobe(kcb);
- else {
- reset_current_kprobe();
- }
+ disable_singlestep(kcb, regs, (unsigned long) p->addr);
+ pop_kprobe(kcb);
preempt_enable_no_resched();
break;
case KPROBE_HIT_ACTIVE:
@@ -538,7 +529,7 @@ static int __kprobes kprobe_trap_handler(struct pt_regs *regs, int trapnr)
* we can also use npre/npostfault count for accouting
* these specific fault cases.
*/
- kprobes_inc_nmissed_count(cur);
+ kprobes_inc_nmissed_count(p);
/*
* We come here because instructions in the pre/post
@@ -547,7 +538,7 @@ static int __kprobes kprobe_trap_handler(struct pt_regs *regs, int trapnr)
* copy_from_user(), get_user() etc. Let the
* user-specified handler try to fix it first.
*/
- if (cur->fault_handler && cur->fault_handler(cur, regs, trapnr))
+ if (p->fault_handler && p->fault_handler(p, regs, trapnr))
return 1;
/*
@@ -589,7 +580,7 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data)
{
- struct die_args *args = (struct die_args *)data;
+ struct die_args *args = (struct die_args *) data;
struct pt_regs *regs = args->regs;
int ret = NOTIFY_DONE;
@@ -598,16 +589,16 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
switch (val) {
case DIE_BPT:
- if (kprobe_handler(args->regs))
+ if (kprobe_handler(regs))
ret = NOTIFY_STOP;
break;
case DIE_SSTEP:
- if (post_kprobe_handler(args->regs))
+ if (post_kprobe_handler(regs))
ret = NOTIFY_STOP;
break;
case DIE_TRAP:
if (!preemptible() && kprobe_running() &&
- kprobe_trap_handler(args->regs, args->trapnr))
+ kprobe_trap_handler(regs, args->trapnr))
ret = NOTIFY_STOP;
break;
default:
@@ -623,23 +614,19 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
{
struct jprobe *jp = container_of(p, struct jprobe, kp);
- unsigned long addr;
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
+ unsigned long stack;
memcpy(&kcb->jprobe_saved_regs, regs, sizeof(struct pt_regs));
/* setup return addr to the jprobe handler routine */
- regs->psw.addr = (unsigned long)(jp->entry) | PSW_ADDR_AMODE;
+ regs->psw.addr = (unsigned long) jp->entry | PSW_ADDR_AMODE;
regs->psw.mask &= ~(PSW_MASK_IO | PSW_MASK_EXT);
- /* r14 is the function return address */
- kcb->jprobe_saved_r14 = (unsigned long)regs->gprs[14];
/* r15 is the stack pointer */
- kcb->jprobe_saved_r15 = (unsigned long)regs->gprs[15];
- addr = (unsigned long)kcb->jprobe_saved_r15;
+ stack = (unsigned long) regs->gprs[15];
- memcpy(kcb->jprobes_stack, (kprobe_opcode_t *) addr,
- MIN_STACK_SIZE(addr));
+ memcpy(kcb->jprobes_stack, (void *) stack, MIN_STACK_SIZE(stack));
return 1;
}
@@ -656,30 +643,29 @@ void __kprobes jprobe_return_end(void)
int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
- unsigned long stack_addr = (unsigned long)(kcb->jprobe_saved_r15);
+ unsigned long stack;
+
+ stack = (unsigned long) kcb->jprobe_saved_regs.gprs[15];
/* Put the regs back */
memcpy(regs, &kcb->jprobe_saved_regs, sizeof(struct pt_regs));
/* put the stack back */
- memcpy((kprobe_opcode_t *) stack_addr, kcb->jprobes_stack,
- MIN_STACK_SIZE(stack_addr));
+ memcpy((void *) stack, kcb->jprobes_stack, MIN_STACK_SIZE(stack));
preempt_enable_no_resched();
return 1;
}
-static struct kprobe trampoline_p = {
- .addr = (kprobe_opcode_t *) & kretprobe_trampoline,
+static struct kprobe trampoline = {
+ .addr = (kprobe_opcode_t *) &kretprobe_trampoline,
.pre_handler = trampoline_probe_handler
};
int __init arch_init_kprobes(void)
{
- return register_kprobe(&trampoline_p);
+ return register_kprobe(&trampoline);
}
int __kprobes arch_trampoline_kprobe(struct kprobe *p)
{
- if (p->addr == (kprobe_opcode_t *) & kretprobe_trampoline)
- return 1;
- return 0;
+ return p->addr == (kprobe_opcode_t *) &kretprobe_trampoline;
}
diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S
index dfe015d7398..1e6a5579562 100644
--- a/arch/s390/kernel/mcount.S
+++ b/arch/s390/kernel/mcount.S
@@ -7,6 +7,8 @@
#include <asm/asm-offsets.h>
+ .section .kprobes.text, "ax"
+
.globl ftrace_stub
ftrace_stub:
br %r14
@@ -16,22 +18,12 @@ _mcount:
#ifdef CONFIG_DYNAMIC_FTRACE
br %r14
- .data
- .globl ftrace_dyn_func
-ftrace_dyn_func:
- .long ftrace_stub
- .previous
-
.globl ftrace_caller
ftrace_caller:
#endif
stm %r2,%r5,16(%r15)
bras %r1,2f
-#ifdef CONFIG_DYNAMIC_FTRACE
-0: .long ftrace_dyn_func
-#else
0: .long ftrace_trace_function
-#endif
1: .long function_trace_stop
2: l %r2,1b-0b(%r1)
icm %r2,0xf,0(%r2)
@@ -47,21 +39,15 @@ ftrace_caller:
l %r14,0(%r14)
basr %r14,%r14
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
-#ifdef CONFIG_DYNAMIC_FTRACE
+ l %r2,100(%r15)
+ l %r3,152(%r15)
.globl ftrace_graph_caller
ftrace_graph_caller:
- # This unconditional branch gets runtime patched. Change only if
- # you know what you are doing. See ftrace_enable_graph_caller().
- j 1f
-#endif
- bras %r1,0f
- .long prepare_ftrace_return
-0: l %r2,152(%r15)
- l %r4,0(%r1)
- l %r3,100(%r15)
- basr %r14,%r4
- st %r2,100(%r15)
-1:
+# The bras instruction gets runtime patched to call prepare_ftrace_return.
+# See ftrace_enable_ftrace_graph_caller. The patched instruction is:
+# bras %r14,prepare_ftrace_return
+ bras %r14,0f
+0: st %r2,100(%r15)
#endif
ahi %r15,96
l %r14,56(%r15)
diff --git a/arch/s390/kernel/mcount64.S b/arch/s390/kernel/mcount64.S
index c37211c6092..e73667286ac 100644
--- a/arch/s390/kernel/mcount64.S
+++ b/arch/s390/kernel/mcount64.S
@@ -7,6 +7,8 @@
#include <asm/asm-offsets.h>
+ .section .kprobes.text, "ax"
+
.globl ftrace_stub
ftrace_stub:
br %r14
@@ -16,12 +18,6 @@ _mcount:
#ifdef CONFIG_DYNAMIC_FTRACE
br %r14
- .data
- .globl ftrace_dyn_func
-ftrace_dyn_func:
- .quad ftrace_stub
- .previous
-
.globl ftrace_caller
ftrace_caller:
#endif
@@ -35,26 +31,19 @@ ftrace_caller:
stg %r1,__SF_BACKCHAIN(%r15)
lgr %r2,%r14
lg %r3,168(%r15)
-#ifdef CONFIG_DYNAMIC_FTRACE
- larl %r14,ftrace_dyn_func
-#else
larl %r14,ftrace_trace_function
-#endif
lg %r14,0(%r14)
basr %r14,%r14
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
-#ifdef CONFIG_DYNAMIC_FTRACE
+ lg %r2,168(%r15)
+ lg %r3,272(%r15)
.globl ftrace_graph_caller
ftrace_graph_caller:
- # This unconditional branch gets runtime patched. Change only if
- # you know what you are doing. See ftrace_enable_graph_caller().
- j 0f
-#endif
- lg %r2,272(%r15)
- lg %r3,168(%r15)
- brasl %r14,prepare_ftrace_return
- stg %r2,168(%r15)
-0:
+# The bras instruction gets runtime patched to call prepare_ftrace_return.
+# See ftrace_enable_ftrace_graph_caller. The patched instruction is:
+# bras %r14,prepare_ftrace_return
+ bras %r14,0f
+0: stg %r2,168(%r15)
#endif
aghi %r15,160
lmg %r2,%r5,32(%r15)
diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index 1995c1712fc..fab88431a06 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -8,6 +8,7 @@
* Heiko Carstens <heiko.carstens@de.ibm.com>,
*/
+#include <linux/kernel_stat.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/hardirq.h>
@@ -255,7 +256,7 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
nmi_enter();
s390_idle_check(regs, S390_lowcore.mcck_clock,
S390_lowcore.mcck_enter_timer);
-
+ kstat_cpu(smp_processor_id()).irqs[NMI_NMI]++;
mci = (struct mci *) &S390_lowcore.mcck_interruption_code;
mcck = &__get_cpu_var(cpu_mcck);
umode = user_mode(regs);
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index ec2e03b22ea..6ba42222b54 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -32,6 +32,7 @@
#include <linux/kernel_stat.h>
#include <linux/syscalls.h>
#include <linux/compat.h>
+#include <linux/kprobes.h>
#include <asm/compat.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@@ -41,6 +42,7 @@
#include <asm/irq.h>
#include <asm/timer.h>
#include <asm/nmi.h>
+#include <asm/smp.h>
#include "entry.h"
asmlinkage void ret_from_fork(void) asm ("ret_from_fork");
@@ -75,13 +77,8 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
*/
static void default_idle(void)
{
- /* CPU is going idle. */
-#ifdef CONFIG_HOTPLUG_CPU
- if (cpu_is_offline(smp_processor_id())) {
- preempt_enable_no_resched();
+ if (cpu_is_offline(smp_processor_id()))
cpu_die();
- }
-#endif
local_irq_disable();
if (need_resched()) {
local_irq_enable();
@@ -116,15 +113,17 @@ void cpu_idle(void)
}
}
-extern void kernel_thread_starter(void);
+extern void __kprobes kernel_thread_starter(void);
asm(
- ".align 4\n"
+ ".section .kprobes.text, \"ax\"\n"
+ ".global kernel_thread_starter\n"
"kernel_thread_starter:\n"
" la 2,0(10)\n"
" basr 14,9\n"
" la 2,0\n"
- " br 11\n");
+ " br 11\n"
+ ".previous\n");
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
{
@@ -214,8 +213,10 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
/* start new process with ar4 pointing to the correct address space */
p->thread.mm_segment = get_fs();
/* Don't copy debug registers */
- memset(&p->thread.per_info, 0, sizeof(p->thread.per_info));
+ memset(&p->thread.per_user, 0, sizeof(p->thread.per_user));
+ memset(&p->thread.per_event, 0, sizeof(p->thread.per_event));
clear_tsk_thread_flag(p, TIF_SINGLE_STEP);
+ clear_tsk_thread_flag(p, TIF_PER_TRAP);
/* Initialize per thread user and system timer values */
ti = task_thread_info(p);
ti->user_timer = 0;
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
index 644548e615c..311e9d71288 100644
--- a/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@ -13,7 +13,7 @@
#include <linux/smp.h>
#include <linux/seq_file.h>
#include <linux/delay.h>
-
+#include <linux/cpu.h>
#include <asm/elf.h>
#include <asm/lowcore.h>
#include <asm/param.h>
@@ -35,17 +35,6 @@ void __cpuinit cpu_init(void)
}
/*
- * print_cpu_info - print basic information about a cpu
- */
-void __cpuinit print_cpu_info(void)
-{
- struct cpuid *id = &per_cpu(cpu_id, smp_processor_id());
-
- pr_info("Processor %d started, address %d, identification %06X\n",
- S390_lowcore.cpu_nr, stap(), id->ident);
-}
-
-/*
* show_cpuinfo - Get information on one CPU for use by procfs.
*/
static int show_cpuinfo(struct seq_file *m, void *v)
@@ -57,9 +46,8 @@ static int show_cpuinfo(struct seq_file *m, void *v)
unsigned long n = (unsigned long) v - 1;
int i;
- s390_adjust_jiffies();
- preempt_disable();
if (!n) {
+ s390_adjust_jiffies();
seq_printf(m, "vendor_id : IBM/S390\n"
"# processors : %i\n"
"bogomips per cpu: %lu.%02lu\n",
@@ -71,7 +59,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
seq_printf(m, "%s ", hwcap_str[i]);
seq_puts(m, "\n");
}
-
+ get_online_cpus();
if (cpu_online(n)) {
struct cpuid *id = &per_cpu(cpu_id, n);
seq_printf(m, "processor %li: "
@@ -80,7 +68,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
"machine = %04X\n",
n, id->version, id->ident, id->machine);
}
- preempt_enable();
+ put_online_cpus();
return 0;
}
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 019bb714db4..ef86ad24398 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -1,25 +1,9 @@
/*
- * arch/s390/kernel/ptrace.c
+ * Ptrace user space interface.
*
- * S390 version
- * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
- * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
+ * Copyright IBM Corp. 1999,2010
+ * Author(s): Denis Joseph Barrow
* Martin Schwidefsky (schwidefsky@de.ibm.com)
- *
- * Based on PowerPC version
- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- * Derived from "arch/m68k/kernel/ptrace.c"
- * Copyright (C) 1994 by Hamish Macdonald
- * Taken from linux/kernel/ptrace.c and modified for M680x0.
- * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
- *
- * Modified by Cort Dougan (cort@cs.nmt.edu)
- *
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License. See the file README.legal in the main directory of
- * this archive for more details.
*/
#include <linux/kernel.h>
@@ -61,76 +45,58 @@ enum s390_regset {
REGSET_GENERAL_EXTENDED,
};
-static void
-FixPerRegisters(struct task_struct *task)
+void update_per_regs(struct task_struct *task)
{
- struct pt_regs *regs;
- per_struct *per_info;
- per_cr_words cr_words;
-
- regs = task_pt_regs(task);
- per_info = (per_struct *) &task->thread.per_info;
- per_info->control_regs.bits.em_instruction_fetch =
- per_info->single_step | per_info->instruction_fetch;
-
- if (per_info->single_step) {
- per_info->control_regs.bits.starting_addr = 0;
-#ifdef CONFIG_COMPAT
- if (is_compat_task())
- per_info->control_regs.bits.ending_addr = 0x7fffffffUL;
- else
-#endif
- per_info->control_regs.bits.ending_addr = PSW_ADDR_INSN;
- } else {
- per_info->control_regs.bits.starting_addr =
- per_info->starting_addr;
- per_info->control_regs.bits.ending_addr =
- per_info->ending_addr;
- }
- /*
- * if any of the control reg tracing bits are on
- * we switch on per in the psw
- */
- if (per_info->control_regs.words.cr[0] & PER_EM_MASK)
- regs->psw.mask |= PSW_MASK_PER;
- else
+ static const struct per_regs per_single_step = {
+ .control = PER_EVENT_IFETCH,
+ .start = 0,
+ .end = PSW_ADDR_INSN,
+ };
+ struct pt_regs *regs = task_pt_regs(task);
+ struct thread_struct *thread = &task->thread;
+ const struct per_regs *new;
+ struct per_regs old;
+
+ /* TIF_SINGLE_STEP overrides the user specified PER registers. */
+ new = test_tsk_thread_flag(task, TIF_SINGLE_STEP) ?
+ &per_single_step : &thread->per_user;
+
+ /* Take care of the PER enablement bit in the PSW. */
+ if (!(new->control & PER_EVENT_MASK)) {
regs->psw.mask &= ~PSW_MASK_PER;
-
- if (per_info->control_regs.bits.em_storage_alteration)
- per_info->control_regs.bits.storage_alt_space_ctl = 1;
- else
- per_info->control_regs.bits.storage_alt_space_ctl = 0;
-
- if (task == current) {
- __ctl_store(cr_words, 9, 11);
- if (memcmp(&cr_words, &per_info->control_regs.words,
- sizeof(cr_words)) != 0)
- __ctl_load(per_info->control_regs.words, 9, 11);
+ return;
}
+ regs->psw.mask |= PSW_MASK_PER;
+ __ctl_store(old, 9, 11);
+ if (memcmp(new, &old, sizeof(struct per_regs)) != 0)
+ __ctl_load(*new, 9, 11);
}
void user_enable_single_step(struct task_struct *task)
{
- task->thread.per_info.single_step = 1;
- FixPerRegisters(task);
+ set_tsk_thread_flag(task, TIF_SINGLE_STEP);
+ if (task == current)
+ update_per_regs(task);
}
void user_disable_single_step(struct task_struct *task)
{
- task->thread.per_info.single_step = 0;
- FixPerRegisters(task);
+ clear_tsk_thread_flag(task, TIF_SINGLE_STEP);
+ if (task == current)
+ update_per_regs(task);
}
/*
* Called by kernel/ptrace.c when detaching..
*
- * Make sure single step bits etc are not set.
+ * Clear all debugging related fields.
*/
-void
-ptrace_disable(struct task_struct *child)
+void ptrace_disable(struct task_struct *task)
{
- /* make sure the single step bit is not set. */
- user_disable_single_step(child);
+ memset(&task->thread.per_user, 0, sizeof(task->thread.per_user));
+ memset(&task->thread.per_event, 0, sizeof(task->thread.per_event));
+ clear_tsk_thread_flag(task, TIF_SINGLE_STEP);
+ clear_tsk_thread_flag(task, TIF_PER_TRAP);
}
#ifndef CONFIG_64BIT
@@ -139,6 +105,47 @@ ptrace_disable(struct task_struct *child)
# define __ADDR_MASK 7
#endif
+static inline unsigned long __peek_user_per(struct task_struct *child,
+ addr_t addr)
+{
+ struct per_struct_kernel *dummy = NULL;
+
+ if (addr == (addr_t) &dummy->cr9)
+ /* Control bits of the active per set. */
+ return test_thread_flag(TIF_SINGLE_STEP) ?
+ PER_EVENT_IFETCH : child->thread.per_user.control;
+ else if (addr == (addr_t) &dummy->cr10)
+ /* Start address of the active per set. */
+ return test_thread_flag(TIF_SINGLE_STEP) ?
+ 0 : child->thread.per_user.start;
+ else if (addr == (addr_t) &dummy->cr11)
+ /* End address of the active per set. */
+ return test_thread_flag(TIF_SINGLE_STEP) ?
+ PSW_ADDR_INSN : child->thread.per_user.end;
+ else if (addr == (addr_t) &dummy->bits)
+ /* Single-step bit. */
+ return test_thread_flag(TIF_SINGLE_STEP) ?
+ (1UL << (BITS_PER_LONG - 1)) : 0;
+ else if (addr == (addr_t) &dummy->starting_addr)
+ /* Start address of the user specified per set. */
+ return child->thread.per_user.start;
+ else if (addr == (addr_t) &dummy->ending_addr)
+ /* End address of the user specified per set. */
+ return child->thread.per_user.end;
+ else if (addr == (addr_t) &dummy->perc_atmid)
+ /* PER code, ATMID and AI of the last PER trap */
+ return (unsigned long)
+ child->thread.per_event.cause << (BITS_PER_LONG - 16);
+ else if (addr == (addr_t) &dummy->address)
+ /* Address of the last PER trap */
+ return child->thread.per_event.address;
+ else if (addr == (addr_t) &dummy->access_id)
+ /* Access id of the last PER trap */
+ return (unsigned long)
+ child->thread.per_event.paid << (BITS_PER_LONG - 8);
+ return 0;
+}
+
/*
* Read the word at offset addr from the user area of a process. The
* trouble here is that the information is littered over different
@@ -204,10 +211,10 @@ static unsigned long __peek_user(struct task_struct *child, addr_t addr)
} else if (addr < (addr_t) (&dummy->regs.per_info + 1)) {
/*
- * per_info is found in the thread structure
+ * Handle access to the per_info structure.
*/
- offset = addr - (addr_t) &dummy->regs.per_info;
- tmp = *(addr_t *)((addr_t) &child->thread.per_info + offset);
+ addr -= (addr_t) &dummy->regs.per_info;
+ tmp = __peek_user_per(child, addr);
} else
tmp = 0;
@@ -237,6 +244,35 @@ peek_user(struct task_struct *child, addr_t addr, addr_t data)
return put_user(tmp, (addr_t __user *) data);
}
+static inline void __poke_user_per(struct task_struct *child,
+ addr_t addr, addr_t data)
+{
+ struct per_struct_kernel *dummy = NULL;
+
+ /*
+ * There are only three fields in the per_info struct that the
+ * debugger user can write to.
+ * 1) cr9: the debugger wants to set a new PER event mask
+ * 2) starting_addr: the debugger wants to set a new starting
+ * address to use with the PER event mask.
+ * 3) ending_addr: the debugger wants to set a new ending
+ * address to use with the PER event mask.
+ * The user specified PER event mask and the start and end
+ * addresses are used only if single stepping is not in effect.
+ * Writes to any other field in per_info are ignored.
+ */
+ if (addr == (addr_t) &dummy->cr9)
+ /* PER event mask of the user specified per set. */
+ child->thread.per_user.control =
+ data & (PER_EVENT_MASK | PER_CONTROL_MASK);
+ else if (addr == (addr_t) &dummy->starting_addr)
+ /* Starting address of the user specified per set. */
+ child->thread.per_user.start = data;
+ else if (addr == (addr_t) &dummy->ending_addr)
+ /* Ending address of the user specified per set. */
+ child->thread.per_user.end = data;
+}
+
/*
* Write a word to the user area of a process at location addr. This
* operation does have an additional problem compared to peek_user.
@@ -311,19 +347,17 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
} else if (addr < (addr_t) (&dummy->regs.per_info + 1)) {
/*
- * per_info is found in the thread structure
+ * Handle access to the per_info structure.
*/
- offset = addr - (addr_t) &dummy->regs.per_info;
- *(addr_t *)((addr_t) &child->thread.per_info + offset) = data;
+ addr -= (addr_t) &dummy->regs.per_info;
+ __poke_user_per(child, addr, data);
}
- FixPerRegisters(child);
return 0;
}
-static int
-poke_user(struct task_struct *child, addr_t addr, addr_t data)
+static int poke_user(struct task_struct *child, addr_t addr, addr_t data)
{
addr_t mask;
@@ -410,12 +444,53 @@ long arch_ptrace(struct task_struct *child, long request,
*/
/*
+ * Same as peek_user_per but for a 31 bit program.
+ */
+static inline __u32 __peek_user_per_compat(struct task_struct *child,
+ addr_t addr)
+{
+ struct compat_per_struct_kernel *dummy32 = NULL;
+
+ if (addr == (addr_t) &dummy32->cr9)
+ /* Control bits of the active per set. */
+ return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
+ PER_EVENT_IFETCH : child->thread.per_user.control;
+ else if (addr == (addr_t) &dummy32->cr10)
+ /* Start address of the active per set. */
+ return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
+ 0 : child->thread.per_user.start;
+ else if (addr == (addr_t) &dummy32->cr11)
+ /* End address of the active per set. */
+ return test_thread_flag(TIF_SINGLE_STEP) ?
+ PSW32_ADDR_INSN : child->thread.per_user.end;
+ else if (addr == (addr_t) &dummy32->bits)
+ /* Single-step bit. */
+ return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
+ 0x80000000 : 0;
+ else if (addr == (addr_t) &dummy32->starting_addr)
+ /* Start address of the user specified per set. */
+ return (__u32) child->thread.per_user.start;
+ else if (addr == (addr_t) &dummy32->ending_addr)
+ /* End address of the user specified per set. */
+ return (__u32) child->thread.per_user.end;
+ else if (addr == (addr_t) &dummy32->perc_atmid)
+ /* PER code, ATMID and AI of the last PER trap */
+ return (__u32) child->thread.per_event.cause << 16;
+ else if (addr == (addr_t) &dummy32->address)
+ /* Address of the last PER trap */
+ return (__u32) child->thread.per_event.address;
+ else if (addr == (addr_t) &dummy32->access_id)
+ /* Access id of the last PER trap */
+ return (__u32) child->thread.per_event.paid << 24;
+ return 0;
+}
+
+/*
* Same as peek_user but for a 31 bit program.
*/
static u32 __peek_user_compat(struct task_struct *child, addr_t addr)
{
- struct user32 *dummy32 = NULL;
- per_struct32 *dummy_per32 = NULL;
+ struct compat_user *dummy32 = NULL;
addr_t offset;
__u32 tmp;
@@ -465,19 +540,10 @@ static u32 __peek_user_compat(struct task_struct *child, addr_t addr)
} else if (addr < (addr_t) (&dummy32->regs.per_info + 1)) {
/*
- * per_info is found in the thread structure
+ * Handle access to the per_info structure.
*/
- offset = addr - (addr_t) &dummy32->regs.per_info;
- /* This is magic. See per_struct and per_struct32. */
- if ((offset >= (addr_t) &dummy_per32->control_regs &&
- offset < (addr_t) (&dummy_per32->control_regs + 1)) ||
- (offset >= (addr_t) &dummy_per32->starting_addr &&
- offset <= (addr_t) &dummy_per32->ending_addr) ||
- offset == (addr_t) &dummy_per32->lowcore.words.address)
- offset = offset*2 + 4;
- else
- offset = offset*2;
- tmp = *(__u32 *)((addr_t) &child->thread.per_info + offset);
+ addr -= (addr_t) &dummy32->regs.per_info;
+ tmp = __peek_user_per_compat(child, addr);
} else
tmp = 0;
@@ -498,13 +564,32 @@ static int peek_user_compat(struct task_struct *child,
}
/*
+ * Same as poke_user_per but for a 31 bit program.
+ */
+static inline void __poke_user_per_compat(struct task_struct *child,
+ addr_t addr, __u32 data)
+{
+ struct compat_per_struct_kernel *dummy32 = NULL;
+
+ if (addr == (addr_t) &dummy32->cr9)
+ /* PER event mask of the user specified per set. */
+ child->thread.per_user.control =
+ data & (PER_EVENT_MASK | PER_CONTROL_MASK);
+ else if (addr == (addr_t) &dummy32->starting_addr)
+ /* Starting address of the user specified per set. */
+ child->thread.per_user.start = data;
+ else if (addr == (addr_t) &dummy32->ending_addr)
+ /* Ending address of the user specified per set. */
+ child->thread.per_user.end = data;
+}
+
+/*
* Same as poke_user but for a 31 bit program.
*/
static int __poke_user_compat(struct task_struct *child,
addr_t addr, addr_t data)
{
- struct user32 *dummy32 = NULL;
- per_struct32 *dummy_per32 = NULL;
+ struct compat_user *dummy32 = NULL;
__u32 tmp = (__u32) data;
addr_t offset;
@@ -561,37 +646,20 @@ static int __poke_user_compat(struct task_struct *child,
} else if (addr < (addr_t) (&dummy32->regs.per_info + 1)) {
/*
- * per_info is found in the thread structure.
- */
- offset = addr - (addr_t) &dummy32->regs.per_info;
- /*
- * This is magic. See per_struct and per_struct32.
- * By incident the offsets in per_struct are exactly
- * twice the offsets in per_struct32 for all fields.
- * The 8 byte fields need special handling though,
- * because the second half (bytes 4-7) is needed and
- * not the first half.
+ * Handle access to the per_info structure.
*/
- if ((offset >= (addr_t) &dummy_per32->control_regs &&
- offset < (addr_t) (&dummy_per32->control_regs + 1)) ||
- (offset >= (addr_t) &dummy_per32->starting_addr &&
- offset <= (addr_t) &dummy_per32->ending_addr) ||
- offset == (addr_t) &dummy_per32->lowcore.words.address)
- offset = offset*2 + 4;
- else
- offset = offset*2;
- *(__u32 *)((addr_t) &child->thread.per_info + offset) = tmp;
-
+ addr -= (addr_t) &dummy32->regs.per_info;
+ __poke_user_per_compat(child, addr, data);
}
- FixPerRegisters(child);
return 0;
}
static int poke_user_compat(struct task_struct *child,
addr_t addr, addr_t data)
{
- if (!is_compat_task() || (addr & 3) || addr > sizeof(struct user32) - 3)
+ if (!is_compat_task() || (addr & 3) ||
+ addr > sizeof(struct compat_user) - 3)
return -EIO;
return __poke_user_compat(child, addr, data);
@@ -602,7 +670,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
{
unsigned long addr = caddr;
unsigned long data = cdata;
- ptrace_area_emu31 parea;
+ compat_ptrace_area parea;
int copied, ret;
switch (request) {
diff --git a/arch/s390/kernel/s390_ext.c b/arch/s390/kernel/s390_ext.c
index bd1db508e8a..185029919c4 100644
--- a/arch/s390/kernel/s390_ext.c
+++ b/arch/s390/kernel/s390_ext.c
@@ -1,33 +1,36 @@
/*
- * arch/s390/kernel/s390_ext.c
- *
- * S390 version
- * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
- * Author(s): Holger Smolinski (Holger.Smolinski@de.ibm.com),
- * Martin Schwidefsky (schwidefsky@de.ibm.com)
+ * Copyright IBM Corp. 1999,2010
+ * Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>,
+ * Martin Schwidefsky <schwidefsky@de.ibm.com>,
*/
+#include <linux/kernel_stat.h>
+#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/kernel.h>
-#include <linux/slab.h>
#include <linux/ftrace.h>
#include <linux/errno.h>
-#include <linux/kernel_stat.h>
-#include <linux/interrupt.h>
-#include <asm/cputime.h>
-#include <asm/lowcore.h>
+#include <linux/slab.h>
#include <asm/s390_ext.h>
#include <asm/irq_regs.h>
+#include <asm/cputime.h>
+#include <asm/lowcore.h>
#include <asm/irq.h>
#include "entry.h"
+struct ext_int_info {
+ struct ext_int_info *next;
+ ext_int_handler_t handler;
+ __u16 code;
+};
+
/*
* ext_int_hash[index] is the start of the list for all external interrupts
* that hash to this index. With the current set of external interrupts
* (0x1202 external call, 0x1004 cpu timer, 0x2401 hwc console, 0x4000
* iucv and 0x2603 pfault) this is always the first element.
*/
-ext_int_info_t *ext_int_hash[256] = { NULL, };
+static struct ext_int_info *ext_int_hash[256];
static inline int ext_hash(__u16 code)
{
@@ -36,90 +39,53 @@ static inline int ext_hash(__u16 code)
int register_external_interrupt(__u16 code, ext_int_handler_t handler)
{
- ext_int_info_t *p;
- int index;
-
- p = kmalloc(sizeof(ext_int_info_t), GFP_ATOMIC);
- if (p == NULL)
- return -ENOMEM;
- p->code = code;
- p->handler = handler;
- index = ext_hash(code);
- p->next = ext_int_hash[index];
- ext_int_hash[index] = p;
- return 0;
-}
-
-int register_early_external_interrupt(__u16 code, ext_int_handler_t handler,
- ext_int_info_t *p)
-{
- int index;
+ struct ext_int_info *p;
+ int index;
- if (p == NULL)
- return -EINVAL;
- p->code = code;
- p->handler = handler;
+ p = kmalloc(sizeof(*p), GFP_ATOMIC);
+ if (!p)
+ return -ENOMEM;
+ p->code = code;
+ p->handler = handler;
index = ext_hash(code);
- p->next = ext_int_hash[index];
- ext_int_hash[index] = p;
- return 0;
+ p->next = ext_int_hash[index];
+ ext_int_hash[index] = p;
+ return 0;
}
+EXPORT_SYMBOL(register_external_interrupt);
int unregister_external_interrupt(__u16 code, ext_int_handler_t handler)
{
- ext_int_info_t *p, *q;
- int index;
-
- index = ext_hash(code);
- q = NULL;
- p = ext_int_hash[index];
- while (p != NULL) {
- if (p->code == code && p->handler == handler)
- break;
- q = p;
- p = p->next;
- }
- if (p == NULL)
- return -ENOENT;
- if (q != NULL)
- q->next = p->next;
- else
- ext_int_hash[index] = p->next;
- kfree(p);
- return 0;
-}
-
-int unregister_early_external_interrupt(__u16 code, ext_int_handler_t handler,
- ext_int_info_t *p)
-{
- ext_int_info_t *q;
+ struct ext_int_info *p, *q;
int index;
- if (p == NULL || p->code != code || p->handler != handler)
- return -EINVAL;
index = ext_hash(code);
- q = ext_int_hash[index];
- if (p != q) {
- while (q != NULL) {
- if (q->next == p)
- break;
- q = q->next;
- }
- if (q == NULL)
- return -ENOENT;
+ q = NULL;
+ p = ext_int_hash[index];
+ while (p) {
+ if (p->code == code && p->handler == handler)
+ break;
+ q = p;
+ p = p->next;
+ }
+ if (!p)
+ return -ENOENT;
+ if (q)
q->next = p->next;
- } else
+ else
ext_int_hash[index] = p->next;
+ kfree(p);
return 0;
}
+EXPORT_SYMBOL(unregister_external_interrupt);
void __irq_entry do_extint(struct pt_regs *regs, unsigned int ext_int_code,
unsigned int param32, unsigned long param64)
{
struct pt_regs *old_regs;
unsigned short code;
- ext_int_info_t *p;
- int index;
+ struct ext_int_info *p;
+ int index;
code = (unsigned short) ext_int_code;
old_regs = set_irq_regs(regs);
@@ -132,7 +98,7 @@ void __irq_entry do_extint(struct pt_regs *regs, unsigned int ext_int_code,
kstat_cpu(smp_processor_id()).irqs[EXTERNAL_INTERRUPT]++;
if (code != 0x1004)
__get_cpu_var(s390_idle).nohz_delay = 1;
- index = ext_hash(code);
+ index = ext_hash(code);
for (p = ext_int_hash[index]; p; p = p->next) {
if (likely(p->code == code))
p->handler(ext_int_code, param32, param64);
@@ -140,6 +106,3 @@ void __irq_entry do_extint(struct pt_regs *regs, unsigned int ext_int_code,
irq_exit();
set_irq_regs(old_regs);
}
-
-EXPORT_SYMBOL(register_external_interrupt);
-EXPORT_SYMBOL(unregister_external_interrupt);
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index ee7ac8b1178..abbb3c3c7aa 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -505,7 +505,7 @@ void do_signal(struct pt_regs *regs)
* Let tracing know that we've done the handler setup.
*/
tracehook_signal_handler(signr, &info, &ka, regs,
- current->thread.per_info.single_step);
+ test_thread_flag(TIF_SINGLE_STEP));
}
return;
}
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 94cf510b8fe..63a97db83f9 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -23,6 +23,7 @@
#define KMSG_COMPONENT "cpu"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#include <linux/workqueue.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mm.h>
@@ -161,6 +162,7 @@ static void do_ext_call_interrupt(unsigned int ext_int_code,
{
unsigned long bits;
+ kstat_cpu(smp_processor_id()).irqs[EXTINT_IPI]++;
/*
* handle bit signal external calls
*
@@ -469,25 +471,25 @@ int __cpuinit start_secondary(void *cpuvoid)
ipi_call_unlock();
/* Switch on interrupts */
local_irq_enable();
- /* Print info about this processor */
- print_cpu_info();
/* cpu_idle will call schedule for us */
cpu_idle();
return 0;
}
-static void __init smp_create_idle(unsigned int cpu)
+struct create_idle {
+ struct work_struct work;
+ struct task_struct *idle;
+ struct completion done;
+ int cpu;
+};
+
+static void __cpuinit smp_fork_idle(struct work_struct *work)
{
- struct task_struct *p;
+ struct create_idle *c_idle;
- /*
- * don't care about the psw and regs settings since we'll never
- * reschedule the forked task.
- */
- p = fork_idle(cpu);
- if (IS_ERR(p))
- panic("failed fork for CPU %u: %li", cpu, PTR_ERR(p));
- current_set[cpu] = p;
+ c_idle = container_of(work, struct create_idle, work);
+ c_idle->idle = fork_idle(c_idle->cpu);
+ complete(&c_idle->done);
}
static int __cpuinit smp_alloc_lowcore(int cpu)
@@ -551,6 +553,7 @@ static void smp_free_lowcore(int cpu)
int __cpuinit __cpu_up(unsigned int cpu)
{
struct _lowcore *cpu_lowcore;
+ struct create_idle c_idle;
struct task_struct *idle;
struct stack_frame *sf;
u32 lowcore;
@@ -558,6 +561,19 @@ int __cpuinit __cpu_up(unsigned int cpu)
if (smp_cpu_state[cpu] != CPU_STATE_CONFIGURED)
return -EIO;
+ idle = current_set[cpu];
+ if (!idle) {
+ c_idle.done = COMPLETION_INITIALIZER_ONSTACK(c_idle.done);
+ INIT_WORK_ONSTACK(&c_idle.work, smp_fork_idle);
+ c_idle.cpu = cpu;
+ schedule_work(&c_idle.work);
+ wait_for_completion(&c_idle.done);
+ if (IS_ERR(c_idle.idle))
+ return PTR_ERR(c_idle.idle);
+ idle = c_idle.idle;
+ current_set[cpu] = c_idle.idle;
+ }
+ init_idle(idle, cpu);
if (smp_alloc_lowcore(cpu))
return -ENOMEM;
do {
@@ -572,7 +588,6 @@ int __cpuinit __cpu_up(unsigned int cpu)
while (sigp_p(lowcore, cpu, sigp_set_prefix) == sigp_busy)
udelay(10);
- idle = current_set[cpu];
cpu_lowcore = lowcore_ptr[cpu];
cpu_lowcore->kernel_stack = (unsigned long)
task_stack_page(idle) + THREAD_SIZE;
@@ -664,7 +679,6 @@ void __cpu_die(unsigned int cpu)
udelay(10);
smp_free_lowcore(cpu);
atomic_dec(&init_mm.context.attach_count);
- pr_info("Processor %d stopped\n", cpu);
}
void cpu_die(void)
@@ -684,14 +698,12 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
#endif
unsigned long async_stack, panic_stack;
struct _lowcore *lowcore;
- unsigned int cpu;
smp_detect_cpus();
/* request the 0x1201 emergency signal external interrupt */
if (register_external_interrupt(0x1201, do_ext_call_interrupt) != 0)
panic("Couldn't request external interrupt 0x1201");
- print_cpu_info();
/* Reallocate current lowcore, but keep its contents. */
lowcore = (void *) __get_free_pages(GFP_KERNEL | GFP_DMA, LC_ORDER);
@@ -719,9 +731,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
if (vdso_alloc_per_cpu(smp_processor_id(), &S390_lowcore))
BUG();
#endif
- for_each_possible_cpu(cpu)
- if (cpu != smp_processor_id())
- smp_create_idle(cpu);
}
void __init smp_prepare_boot_cpu(void)
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index f754a6dc4f9..9e7b039458d 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -15,6 +15,7 @@
#define KMSG_COMPONENT "time"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#include <linux/kernel_stat.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/sched.h>
@@ -37,6 +38,7 @@
#include <linux/clocksource.h>
#include <linux/clockchips.h>
#include <linux/gfp.h>
+#include <linux/kprobes.h>
#include <asm/uaccess.h>
#include <asm/delay.h>
#include <asm/s390_ext.h>
@@ -60,7 +62,7 @@ static DEFINE_PER_CPU(struct clock_event_device, comparators);
/*
* Scheduler clock - returns current time in nanosec units.
*/
-unsigned long long notrace sched_clock(void)
+unsigned long long notrace __kprobes sched_clock(void)
{
return (get_clock_monotonic() * 125) >> 9;
}
@@ -159,6 +161,7 @@ static void clock_comparator_interrupt(unsigned int ext_int_code,
unsigned int param32,
unsigned long param64)
{
+ kstat_cpu(smp_processor_id()).irqs[EXTINT_CLK]++;
if (S390_lowcore.clock_comparator == -1ULL)
set_clock_comparator(S390_lowcore.clock_comparator);
}
@@ -169,6 +172,7 @@ static void stp_timing_alert(struct stp_irq_parm *);
static void timing_alert_interrupt(unsigned int ext_int_code,
unsigned int param32, unsigned long param64)
{
+ kstat_cpu(smp_processor_id()).irqs[EXTINT_TLA]++;
if (param32 & 0x00c40000)
etr_timing_alert((struct etr_irq_parm *) &param32);
if (param32 & 0x00038000)
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 70640822621..5eb78dd584c 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -365,12 +365,10 @@ static inline void __user *get_psw_address(struct pt_regs *regs,
((regs->psw.addr - (pgm_int_code >> 16)) & PSW_ADDR_INSN);
}
-void __kprobes do_single_step(struct pt_regs *regs)
+void __kprobes do_per_trap(struct pt_regs *regs)
{
- if (notify_die(DIE_SSTEP, "sstep", regs, 0, 0,
- SIGTRAP) == NOTIFY_STOP){
+ if (notify_die(DIE_SSTEP, "sstep", regs, 0, 0, SIGTRAP) == NOTIFY_STOP)
return;
- }
if (tracehook_consider_fatal_signal(current, SIGTRAP))
force_sig(SIGTRAP, current);
}
@@ -451,8 +449,8 @@ static inline void do_fp_trap(struct pt_regs *regs, void __user *location,
"floating point exception", regs, &si);
}
-static void illegal_op(struct pt_regs *regs, long pgm_int_code,
- unsigned long trans_exc_code)
+static void __kprobes illegal_op(struct pt_regs *regs, long pgm_int_code,
+ unsigned long trans_exc_code)
{
siginfo_t info;
__u8 opcode[6];
@@ -688,7 +686,7 @@ static void space_switch_exception(struct pt_regs *regs, long pgm_int_code,
do_trap(pgm_int_code, SIGILL, "space switch event", regs, &info);
}
-asmlinkage void kernel_stack_overflow(struct pt_regs * regs)
+asmlinkage void __kprobes kernel_stack_overflow(struct pt_regs * regs)
{
bust_spinlocks(1);
printk("Kernel stack overflow.\n");
@@ -733,5 +731,6 @@ void __init trap_init(void)
pgm_check_table[0x15] = &operand_exception;
pgm_check_table[0x1C] = &space_switch_exception;
pgm_check_table[0x1D] = &hfp_sqrt_exception;
- pfault_irq_init();
+ /* Enable machine checks early. */
+ local_mcck_enable();
}
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index 7eff9b7347c..1ccdf4d8aa8 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -20,6 +20,7 @@
#include <linux/rcupdate.h>
#include <linux/posix-timers.h>
#include <linux/cpu.h>
+#include <linux/kprobes.h>
#include <asm/s390_ext.h>
#include <asm/timer.h>
@@ -122,7 +123,7 @@ void account_system_vtime(struct task_struct *tsk)
}
EXPORT_SYMBOL_GPL(account_system_vtime);
-void vtime_start_cpu(__u64 int_clock, __u64 enter_timer)
+void __kprobes vtime_start_cpu(__u64 int_clock, __u64 enter_timer)
{
struct s390_idle_data *idle = &__get_cpu_var(s390_idle);
struct vtimer_queue *vq = &__get_cpu_var(virt_cpu_timer);
@@ -162,7 +163,7 @@ void vtime_start_cpu(__u64 int_clock, __u64 enter_timer)
idle->sequence++;
}
-void vtime_stop_cpu(void)
+void __kprobes vtime_stop_cpu(void)
{
struct s390_idle_data *idle = &__get_cpu_var(s390_idle);
struct vtimer_queue *vq = &__get_cpu_var(virt_cpu_timer);
@@ -323,6 +324,7 @@ static void do_cpu_timer_interrupt(unsigned int ext_int_code,
struct list_head cb_list; /* the callback queue */
__u64 elapsed, next;
+ kstat_cpu(smp_processor_id()).irqs[EXTINT_TMR]++;
INIT_LIST_HEAD(&cb_list);
vq = &__get_cpu_var(virt_cpu_timer);
diff --git a/arch/s390/kvm/Kconfig b/arch/s390/kvm/Kconfig
index a7251580891..f66a1bdbb61 100644
--- a/arch/s390/kvm/Kconfig
+++ b/arch/s390/kvm/Kconfig
@@ -4,8 +4,8 @@
source "virt/kvm/Kconfig"
menuconfig VIRTUALIZATION
- bool "Virtualization"
- default y
+ def_bool y
+ prompt "Virtualization"
---help---
Say Y here to get to see options for using your Linux host to run other
operating systems inside virtual machines (guests).
@@ -16,7 +16,8 @@ menuconfig VIRTUALIZATION
if VIRTUALIZATION
config KVM
- tristate "Kernel-based Virtual Machine (KVM) support"
+ def_tristate y
+ prompt "Kernel-based Virtual Machine (KVM) support"
depends on HAVE_KVM && EXPERIMENTAL
select PREEMPT_NOTIFIERS
select ANON_INODES
diff --git a/arch/s390/lib/delay.c b/arch/s390/lib/delay.c
index 7c37ec359ec..0f53110e1d0 100644
--- a/arch/s390/lib/delay.c
+++ b/arch/s390/lib/delay.c
@@ -47,7 +47,6 @@ static void __udelay_disabled(unsigned long long usecs)
lockdep_on();
__ctl_load(cr0_saved, 0, 0);
local_tick_enable(clock_saved);
- set_clock_comparator(S390_lowcore.clock_comparator);
}
static void __udelay_enabled(unsigned long long usecs)
@@ -70,7 +69,6 @@ static void __udelay_enabled(unsigned long long usecs)
if (clock_saved)
local_tick_enable(clock_saved);
} while (get_clock() < end);
- set_clock_comparator(S390_lowcore.clock_comparator);
}
/*
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index fe5701e9efb..2c57806c085 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -10,6 +10,7 @@
* Copyright (C) 1995 Linus Torvalds
*/
+#include <linux/kernel_stat.h>
#include <linux/perf_event.h>
#include <linux/signal.h>
#include <linux/sched.h>
@@ -234,13 +235,13 @@ static noinline int signal_return(struct pt_regs *regs, long int_code,
rc = __get_user(instruction, (u16 __user *) regs->psw.addr);
if (!rc && instruction == 0x0a77) {
- clear_tsk_thread_flag(current, TIF_SINGLE_STEP);
+ clear_tsk_thread_flag(current, TIF_PER_TRAP);
if (is_compat_task())
sys32_sigreturn();
else
sys_sigreturn();
} else if (!rc && instruction == 0x0aad) {
- clear_tsk_thread_flag(current, TIF_SINGLE_STEP);
+ clear_tsk_thread_flag(current, TIF_PER_TRAP);
if (is_compat_task())
sys32_rt_sigreturn();
else
@@ -378,7 +379,7 @@ static inline int do_exception(struct pt_regs *regs, int access,
* The instruction that caused the program check will
* be repeated. Don't signal single step via SIGTRAP.
*/
- clear_tsk_thread_flag(tsk, TIF_SINGLE_STEP);
+ clear_tsk_thread_flag(tsk, TIF_PER_TRAP);
fault = 0;
out_up:
up_read(&mm->mmap_sem);
@@ -480,8 +481,7 @@ int __handle_fault(unsigned long uaddr, unsigned long pgm_int_code, int write)
/*
* 'pfault' pseudo page faults routines.
*/
-static ext_int_info_t ext_int_pfault;
-static int pfault_disable = 0;
+static int pfault_disable;
static int __init nopfault(char *str)
{
@@ -543,6 +543,7 @@ static void pfault_interrupt(unsigned int ext_int_code,
struct task_struct *tsk;
__u16 subcode;
+ kstat_cpu(smp_processor_id()).irqs[EXTINT_PFL]++;
/*
* Get the external interruption subcode & pfault
* initial/completion signal bit. VM stores this
@@ -592,24 +593,28 @@ static void pfault_interrupt(unsigned int ext_int_code,
}
}
-void __init pfault_irq_init(void)
+static int __init pfault_irq_init(void)
{
- if (!MACHINE_IS_VM)
- return;
+ int rc;
+ if (!MACHINE_IS_VM)
+ return 0;
/*
* Try to get pfault pseudo page faults going.
*/
- if (register_early_external_interrupt(0x2603, pfault_interrupt,
- &ext_int_pfault) != 0)
- panic("Couldn't request external interrupt 0x2603");
-
+ rc = register_external_interrupt(0x2603, pfault_interrupt);
+ if (rc) {
+ pfault_disable = 1;
+ return rc;
+ }
if (pfault_init() == 0)
- return;
+ return 0;
/* Tough luck, no pfault. */
pfault_disable = 1;
- unregister_early_external_interrupt(0x2603, pfault_interrupt,
- &ext_int_pfault);
+ unregister_external_interrupt(0x2603, pfault_interrupt);
+ return 0;
}
+early_initcall(pfault_irq_init);
+
#endif