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linux/arch
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Andrey Ryabinin ef7f0d6a6c x86_64: add KASan support 
This patch adds arch specific code for kernel address sanitizer.

16TB of virtual addressed used for shadow memory.  It's located in range
[ffffec0000000000 - fffffc0000000000] between vmemmap and %esp fixup
stacks.

At early stage we map whole shadow region with zero page.  Latter, after
pages mapped to direct mapping address range we unmap zero pages from
corresponding shadow (see kasan_map_shadow()) and allocate and map a real
shadow memory reusing vmemmap_populate() function.

Also replace __pa with __pa_nodebug before shadow initialized.  __pa with
CONFIG_DEBUG_VIRTUAL=y make external function call (__phys_addr)
__phys_addr is instrumented, so __asan_load could be called before shadow
area initialized.

Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Signed-off-by: Andrey Konovalov <adech.fo@gmail.com>
Cc: Yuri Gribov <tetra2005@gmail.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Jim Davis <jim.epost@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-13 21:21:41 -08:00
..
alpha all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
arc all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
arm Fairly small update, but there are some interesting new features. 2015-02-13 09:55:09 -08:00
arm64 Fairly small update, but there are some interesting new features. 2015-02-13 09:55:09 -08:00
avr32 all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
blackfin all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
c6x all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
cris all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
frv lib/string.c: remove strnicmp() 2015-02-12 18:54:14 -08:00
hexagon all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
ia64 ia64: use %*pb[l] to print bitmaps including cpumasks and nodemasks 2015-02-13 21:21:37 -08:00
m32r all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
m68k all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
metag all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
microblaze all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
mips mips: use %*pb[l] to print bitmaps including cpumasks and nodemasks 2015-02-13 21:21:36 -08:00
mn10300 all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
nios2 mm: make FIRST_USER_ADDRESS unsigned long on all archs 2015-02-11 17:06:03 -08:00
openrisc all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
parisc all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
powerpc powerpc: use %*pb[l] to print bitmaps including cpumasks and nodemasks 2015-02-13 21:21:36 -08:00
s390 Fairly small update, but there are some interesting new features. 2015-02-13 09:55:09 -08:00
score all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
sh all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
sparc all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
tile tile: use %*pb[l] to print bitmaps including cpumasks and nodemasks 2015-02-13 21:21:37 -08:00
um all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
unicore32 all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
x86 x86_64: add KASan support 2015-02-13 21:21:41 -08:00
xtensa xtensa: use %*pb[l] to print bitmaps including cpumasks and nodemasks 2015-02-13 21:21:37 -08:00
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