KASAN is supported on 32-bit powerpc and the docs should reflect this. Suggested-by: Christophe Leroy <christophe.leroy@xxxxxx> Reviewed-by: Christophe Leroy <christophe.leroy@xxxxxx> Signed-off-by: Daniel Axtens <dja@xxxxxxxxxx> --- Documentation/dev-tools/kasan.rst | 3 ++- Documentation/powerpc/kasan.txt | 12 ++++++++++++ 2 files changed, 14 insertions(+), 1 deletion(-) create mode 100644 Documentation/powerpc/kasan.txt diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst index e4d66e7c50de..4af2b5d2c9b4 100644 --- a/Documentation/dev-tools/kasan.rst +++ b/Documentation/dev-tools/kasan.rst @@ -22,7 +22,8 @@ global variables yet. Tag-based KASAN is only supported in Clang and requires version 7.0.0 or later. Currently generic KASAN is supported for the x86_64, arm64, xtensa and s390 -architectures, and tag-based KASAN is supported only for arm64. +architectures. It is also supported on 32-bit powerpc kernels. Tag-based KASAN +is supported only on arm64. Usage ----- diff --git a/Documentation/powerpc/kasan.txt b/Documentation/powerpc/kasan.txt new file mode 100644 index 000000000000..a85ce2ff8244 --- /dev/null +++ b/Documentation/powerpc/kasan.txt @@ -0,0 +1,12 @@ +KASAN is supported on powerpc on 32-bit only. + +32 bit support +============== + +KASAN is supported on both hash and nohash MMUs on 32-bit. + +The shadow area sits at the top of the kernel virtual memory space above the +fixmap area and occupies one eighth of the total kernel virtual memory space. + +Instrumentation of the vmalloc area is not currently supported, but modules +are. -- 2.20.1
