linux/Documentation/x86
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
..
i386 doc: spelling error changes 2014-05-05 15:32:05 +02:00
x86_64 x86_64: add KASan support 2015-02-13 21:21:41 -08:00
00-INDEX Documentation/: update 00-INDEX files 2014-02-10 16:01:40 -08:00
boot.txt x86, boot: Correct max ramdisk size name 2014-03-13 15:32:42 -07:00
early-microcode.txt x86, microcode, amd: Early microcode patch loading support for AMD 2013-05-30 20:19:25 -07:00
earlyprintk.txt doc: spelling error changes 2014-05-05 15:32:05 +02:00
entry_64.txt x86, entry: Switch stacks on a paranoid entry from userspace 2015-01-02 10:22:45 -08:00
exception-tables.txt Doc: move Documentation/exception.txt into x86 subdir 2009-07-10 19:10:32 -07:00
intel_mpx.txt x86, mpx: Give MPX a real config option prompt 2014-12-15 15:58:57 +01:00
mtrr.txt documentation: move mtrr.txt to Doc/x86/ subdir 2008-07-28 14:46:49 +02:00
pat.txt x86: PAT: pfnmap documentation update changes 2008-12-19 15:40:31 -08:00
tlb.txt x86/doc: Fix the 'tlb_single_page_flush_ceiling' sysconfig path 2014-08-10 09:09:26 +02:00
usb-legacy-support.txt x86: doc: move x86-generic documentation from Doc/x86/i386 2008-07-22 15:34:38 -04:00
zero-page.txt x86, boot: Define the 2.12 bzImage boot protocol 2013-01-27 15:56:37 -08:00