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| author | Max Filippov | 2017-12-03 22:28:52 +0100 |
|---|---|---|
| committer | Max Filippov | 2017-12-17 07:37:12 +0100 |
| commit | c633544a6154146a210cf158157a1ae7c55473b6 (patch) | |
| tree | d670a9984373622d991c382126f341b6f32154cd /Documentation/features | |
| parent | xtensa: move fixmap and kmap just above the KSEG (diff) | |
| download | kernel-qcow2-linux-c633544a6154146a210cf158157a1ae7c55473b6.tar.gz kernel-qcow2-linux-c633544a6154146a210cf158157a1ae7c55473b6.tar.xz kernel-qcow2-linux-c633544a6154146a210cf158157a1ae7c55473b6.zip | |
xtensa: add support for KASAN
Cover kernel addresses above 0x90000000 by the shadow map. Enable
HAVE_ARCH_KASAN when MMU is enabled. Provide kasan_early_init that fills
shadow map with writable copies of kasan_zero_page. Call
kasan_early_init right after mmu initialization in the setup_arch.
Provide kasan_init that allocates proper shadow map pages from the
memblock and puts these pages into the shadow map for addresses from
VMALLOC area to the end of KSEG. Call kasan_init right after memblock
initialization. Don't use KASAN for the boot code, MMU and KASAN
initialization and page fault handler. Make kernel stack size 4 times
larger when KASAN is enabled to avoid stack overflows.
GCC 7.3, 8 or newer is required to build the xtensa kernel with KASAN.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'Documentation/features')
| -rw-r--r-- | Documentation/features/debug/KASAN/arch-support.txt | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/features/debug/KASAN/arch-support.txt b/Documentation/features/debug/KASAN/arch-support.txt index 76bbd7fe27b3..8abb013db8d1 100644 --- a/Documentation/features/debug/KASAN/arch-support.txt +++ b/Documentation/features/debug/KASAN/arch-support.txt @@ -35,5 +35,5 @@ | um: | TODO | | unicore32: | TODO | | x86: | ok | - | xtensa: | TODO | + | xtensa: | ok | ----------------------- |