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commit 6f3946b421395ff853bc0bcdab9c26b50ebbba8f upstream.
A userland read of more than PAGE_SIZE bytes from /dev/zero results in
(a) not all of the bytes returned being zero, and
(b) memory corruption due to zeroing of bytes beyond the user buffer.
This is caused by improper constraints on the assembly __clear_user function.
The constrints don't indicate to the compiler that the pointer argument is
modified. Since the function is inline, this results in double-incrementing
of the pointer when __clear_user() is invoked through a multi-page read() of
/dev/zero.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Acked-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Fix msr instructions detection. The current code
just use msrclr for loading msr content and compare
it with proper MSR content. If msrclr is not implemented
r8 contains pc address.
Previous code wanted to use MSR carry bit but if msrclr
wasn't implemented carry wasn't cleared.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Do not disable irq in asm but use irq macros.
Systems with MSR=0 couldn't use pte_update function
because msrclr was hardcoded.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Microblaze ASM doesn't support hex values for mfs instructions.
/tmp/ccwiXVmt.s: Assembler messages:
/tmp/ccwiXVmt.s:19: Warning: ignoring operands: x00
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Patch: Fix IRQ flag handling naming
(sha1: f9ee29270c11dba7d0fe0b83ce47a4d8e8d2101)
introduced problem on system with MSR=0.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Microblaze little-endian doesn't support ASM optimized library
functions(memcpy/memmove). Kconfig doens't contain
any information about endian that's why it is necessary to
check it in the source code.
The code is used with barrel shifter is used.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Unaligned code use shift for finding register operand.
There is used BSRLI(r8,r8,2) macro which is expand for BS=0, DIV=1
by
ori rD, r0, (1 << imm); \
idivu rD, rD, rA
but if rD is equal rA then ori instruction rewrite value which
should be devide.
The patch remove this macro which use idivu instruction because
idivu takes 32/34 cycles. The highest shifting is 20 which takes
20 cycles.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Little endian system needs to check OF_DT_HEADER
but it is swapped because it is in big-endian.
Microblaze LE provides lwr instruction which loads
magic number in BIG endian format which can be compared.
There is used the fact that if you write 0x1 as word
and load it as byte then you get for big-endian zero
and 1 for little-endian.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Michal Simek <monstr@monstr.eu>
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All architectures are finally converted. Remove the cruft.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: Michal Simek <monstr@monstr.eu>
Acked-by: David Howells <dhowells@redhat.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Jeff Dike <jdike@addtoit.com>
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The meaning of CONFIG_EMBEDDED has long since been obsoleted; the option
is used to configure any non-standard kernel with a much larger scope than
only small devices.
This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixes
references to the option throughout the kernel. A new CONFIG_EMBEDDED
option is added that automatically selects CONFIG_EXPERT when enabled and
can be used in the future to isolate options that should only be
considered for embedded systems (RISC architectures, SLOB, etc).
Calling the option "EXPERT" more accurately represents its intention: only
expert users who understand the impact of the configuration changes they
are making should enable it.
Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: David Woodhouse <david.woodhouse@intel.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Greg KH <gregkh@suse.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Robin Holt <holt@sgi.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: Fix asm/pgtable.h
microblaze: Fix missing pagemap.h
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Function ptep_test_and_clear_young have had wrong the first argument.
It is also necessary to add __HAVE macros for ptep_test_and_clear_young and
ptep_get_and_clear functions.
Error log:
In file included from linux/arch/microblaze/include/asm/pgtable.h:570,
from arch/microblaze/mm/pgtable.c:35:
include/asm-generic/pgtable.h:23: error: conflicting types for 'ptep_test_and_clear_young'
linux/arch/microblaze/include/asm/pgtable.h:449: error:
previous definition of 'ptep_test_and_clear_young' was here
include/asm-generic/pgtable.h:73: error: redefinition of 'ptep_get_and_clear'
linux/arch/microblaze/include/asm/pgtable.h:462: error:
previous definition of 'ptep_get_and_clear' was here
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Add missing linux/pagemap.h to solve compilation error.
Error log:
In file included from linux/arch/microblaze/include/asm/tlb.h:17,
from mm/pgtable-generic.c:9:
include/asm-generic/tlb.h: In function 'tlb_flush_mmu':
include/asm-generic/tlb.h:76: error: implicit declaration of function 'release_pages'
include/asm-generic/tlb.h: In function 'tlb_remove_page':
include/asm-generic/tlb.h:105: error: implicit declaration of function 'page_cache_release'
Signed-off-by: Michal Simek <monstr@monstr.eu>
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The physical address is never used by the device tree code when
allocating memory for unflattening. Change the architecture's alloc
hook to return the virutal address instead.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: remove obsolete DEBUG_BOOTMEM
microblaze: trivial: Fix removed the part of line
microblaze: Fix __muldi3 function for little-endian.
microblaze: Clear i/dcache for sw breakpoints
microblaze: Remove useless early_init_dt_check_for_initrd
microblaze: Fix unaligned exception for little endian platform
microblaze: Add PVR for Microblaze v8.00.b
microblaze: Correct PVR access macros
Revert "microblaze: Simplify syscall rutine"
microblaze: Fix initramfs
arch/microblaze: Remove unnecessary semicolons
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"git grep" shows this is the last piece of code using DEBUG_BOOTMEM,
so remove it.
Signed-off-by: WANG Cong <amwang@redhat.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Signed-off-by: Michal Simek <monstr@monstr.eu>
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__muldi3 was written for big endian platforms.
Code contained half word read/write instructions which
are not compatible with little endian cpu.
Asm __muldi3 implementation is replaced by C version.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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There is necessary to flush dcache and invalidate
icache for address where breakpoint (brki r16, 0x18)
was. The reason is that for some cases icache line
still keeps brki instruction and it is not updated
by origin instruction maintains by gdbserver.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Remove copy&paste error. Microblaze doesn't support initrd.
Signed-off-by: Walter Goossens <waltergoossens@home.nl>
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Half word unaligned accesses need to be fixed.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Microblaze v8.00.b have 0x13 version string.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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A definition like:
called with PVR_IS_FULL(foo) will be preprocessed to:
(foo.foo[0] & PVR0_PVR_FULL_MASK)
^^^
So to fix this and ensure the preprocessor compiles calls correctly:
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
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The device tree code is now in two pieces: some which can be used generically
on any platform which selects CONFIG_OF_FLATTREE, and some early which is used
at boot time on only a few architectures. This patch segregates the early
code so that only those architectures which care about it need compile it.
This also means that some of the requirements in the early code (such as
a cmd_line variable) that most architectures (e.g. X86) don't provide
can be ignored.
Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
[grant.likely@secretlab.ca: remove extra blank line addition]
[grant.likely@secretlab.ca: fixed incorrect #ifdef CONFIG_EARLY_FLATTREE check]
[grant.likely@secretlab.ca: Made OF_EARLY_FLATTREE select instead of depend
on OF_FLATTREE]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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Modify arch/powerpc/boot/Makefile to use dtc command in
scripts/Makefile.lib
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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This reverts commit 0e41c90908881a1b8205c66a66becec7d8d4eb4a.
Break jffs2 rootfs because the patch removes syscall calling
from kernel space.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Patch: initramfs: generalize initramfs_data.xxx.S variants
(sha1 6ae64e428f74e7bacab898ef9665dda719ea6fde)
requires hooks in linker script.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
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There are two identical implementations of of_get_mac_address(), one
each in arch/powerpc/kernel/prom_parse.c and
arch/microblaze/kernel/prom_parse.c. Move this function to a new
common file of_net.{c,h} and adjust all the callers to include the new
header.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
[grant.likely@secretlab.ca: protect header with #ifdef]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6
* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: (38 commits)
kbuild: convert `arch/tile' to the kconfig mainmenu upgrade
README: cite nconfig
Revert "kconfig: Temporarily disable dependency warnings"
kconfig: Use PATH_MAX instead of 128 for path buffer sizes.
kconfig: Fix realloc usage()
kconfig: Propagate const
kconfig: Don't go out from read config loop when you read new symbol
kconfig: fix menuconfig on debian lenny
kbuild: migrate all arch to the kconfig mainmenu upgrade
kconfig: expand file names
kconfig: use the file's name of sourced file
kconfig: constify file name
kconfig: don't emit warning upon rootmenu's prompt redefinition
kconfig: replace KERNELVERSION usage by the mainmenu's prompt
kconfig: delay gconf window initialization
kconfig: expand by default the rootmenu's prompt
kconfig: add a symbol string expansion helper
kconfig: regen parser
kconfig: implement the `mainmenu' directive
kconfig: allow PACKAGE to be defined on the compiler's command-line
...
Fix up trivial conflict in arch/mn10300/Kconfig
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Remove checking @addr greater than 0 because @addr is now unsigned.
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix up the arguments to arch_ptrace() to take account of the fact that
@addr and @data are now unsigned long rather than long as of a preceding
patch in this series.
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: <linux-arch@vger.kernel.org>
Acked-by: Roland McGrath <roland@redhat.com>
Acked-by: David Howells <dhowells@redhat.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Since we no longer need to provide KM_type, the whole pte_*map_nested()
API is now redundant, remove it.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Miller <davem@davemloft.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* 'next' of git://git.monstr.eu/linux-2.6-microblaze: (42 commits)
microblaze: Fix build with make 3.82
fbdev/xilinxfb: Microblaze driver support
microblaze: Support C optimized lib functions for little-endian
microblaze: Separate library optimized functions
microblaze: Support timer on AXI lite
microblaze: Add support for little-endian Microblaze
microblaze: KGDB little endian support
microblaze: Add PVR for endians plus detection
net: emaclite: Add support for little-endian platforms
microblaze: trivial: Add comment for AXI pvr
microblaze: pci-common cleanup
microblaze: Support early console on uart16550
microblaze: Do not compile early console support for uartlite if is disabled
microblaze: Setup early console dynamically
microblaze: Rename all uartlite early printk functions
microblaze: remove early printk uarlite console dependency from header
microblaze: Remove additional compatible properties
microblaze: Remove hardcoded asm instraction for PVR loading
microblaze: Use static const char * const where possible
microblaze: Define VMALLOC_START/END
...
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* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6:
mtd/m25p80: add support to parse the partitions by OF node
of/irq: of_irq.c needs to include linux/irq.h
of/mips: Cleanup some include directives/files.
of/mips: Add device tree support to MIPS
of/flattree: Eliminate need to provide early_init_dt_scan_chosen_arch
of/device: Rework to use common platform_device_alloc() for allocating devices
of/xsysace: Fix OF probing on little-endian systems
of: use __be32 types for big-endian device tree data
of/irq: remove references to NO_IRQ in drivers/of/platform.c
of/promtree: add package-to-path support to pdt
of/promtree: add of_pdt namespace to pdt code
of/promtree: no longer call prom_ functions directly; use an ops structure
of/promtree: make drivers/of/pdt.c no longer sparc-only
sparc: break out some PROM device-tree building code out into drivers/of
of/sparc: convert various prom_* functions to use phandle
sparc: stop exporting openprom.h header
powerpc, of_serial: Endianness issues setting up the serial ports
of: MTD: Fix OF probing on little-endian systems
of: GPIO: Fix OF probing on little-endian systems
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When running make headers_install_all on x86_64 and make 3.82 I hit this:
arch/microblaze/Makefile:80: *** mixed implicit and normal rules. Stop.
make: *** [headers_install_all] Error 2
So split the rules to satisfy make 3.82.
Signed-off-by: Thomas Backlund <tmb@mandriva.org>
Cc: Stable <stable@kernel.org>
Signed-off-by: Michal Simek <monstr@monstr.eu>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-memblock-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (74 commits)
x86-64: Only set max_pfn_mapped to 512 MiB if we enter via head_64.S
xen: Cope with unmapped pages when initializing kernel pagetable
memblock, bootmem: Round pfn properly for memory and reserved regions
memblock: Annotate memblock functions with __init_memblock
memblock: Allow memblock_init to be called early
memblock/arm: Fix memblock_region_is_memory() typo
x86, memblock: Remove __memblock_x86_find_in_range_size()
memblock: Fix wraparound in find_region()
x86-32, memblock: Make add_highpages honor early reserved ranges
x86, memblock: Fix crashkernel allocation
arm, memblock: Fix the sparsemem build
memblock: Fix section mismatch warnings
powerpc, memblock: Fix memblock API change fallout
memblock, microblaze: Fix memblock API change fallout
x86: Remove old bootmem code
x86, memblock: Use memblock_memory_size()/memblock_free_memory_size() to get correct dma_reserve
x86: Remove not used early_res code
x86, memblock: Replace e820_/_early string with memblock_
x86: Use memblock to replace early_res
x86, memblock: Use memblock_debug to control debug message print out
...
Fix up trivial conflicts in arch/x86/kernel/setup.c and kernel/Makefile
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This patch refactors the early init parsing of the chosen node so that
architectures aren't forced to provide an empty implementation of
early_init_dt_scan_chosen_arch. Instead, if an architecture wants to
do something different, it can either use a wrapper function around
early_init_dt_scan_chosen(), or it can replace it altogether.
This patch was written in preparation to adding device tree support to
both x86 ad MIPS.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: David Daney <ddaney@caviumnetworks.com>
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Optimized C library functions can rapidly speedup the kernel.
memset doesn't need to be optimized because there is no difference
in behavior on little/big endian cpu.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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memcpy/memmove/memset
Signed-off-by: Michal Simek <monstr@monstr.eu>
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New microblaze systems uses two buses. One for memories
and flashes and the second for low-speed peripherals
which can run on different CLK. This is the reason
why the kernel is trying to read clock-frequency
directly from node. If there is then the kernel will
work with it. If not then cpu CLK is used.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Microblaze little-endian toolchain exports __MICROBLAZEEL__
which is used in the kernel to identify little/big endian.
The most of the changes are in loading values from DTB which
is always big endian.
Little endian platforms are based on new AXI bus which has
impact to early uartlite initialization.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Just need to use little-endian opcode for brki r16, 0x18
Signed-off-by: Michal Simek <monstr@monstr.eu>
CC: Jason Wessel <jason.wessel@windriver.com>
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Upcomming microblaze version will support little-endian.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
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AXI and OPB share some PVR macros.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Use set_dma_ops and remove now used-once oddly named temp pointer sd.
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Early console support reuse setting from U-BOOT that's why
it is not necessary to setup baudrates, etc.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Kconfig blocks to select any other early console support that's why
this patch has no real impact on current kernel version. But it is done
because of uart16550.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Just setup pointer early console in run time.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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