[PATCH v2 6/6] Documentation/kasan: Update details of KASAN on powerpc
From: Paul Mackerras <hidden>
Date: 2022-05-18 10:10:46
Subsystem:
documentation, documentation process, kasan, the rest · Maintainers:
Jonathan Corbet, Andrey Ryabinin, Linus Torvalds
From: Daniel Axtens <redacted> Signed-off-by: Paul Mackerras <redacted> --- Documentation/dev-tools/kasan.rst | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst
index 8089c559d339..448995c11bee 100644
--- a/Documentation/dev-tools/kasan.rst
+++ b/Documentation/dev-tools/kasan.rst@@ -36,7 +36,9 @@ Both software KASAN modes work with SLUB and SLAB memory allocators, while the hardware tag-based KASAN currently only supports SLUB. Currently, generic KASAN is supported for the x86_64, arm, arm64, xtensa, s390, -and riscv architectures, and tag-based KASAN modes are supported only for arm64. +and riscv architectures. It is also supported on powerpc for 32-bit kernels and +for 64-bit kernels running under the Radix MMU. Tag-based KASAN modes are +supported only for arm64. Usage -----
@@ -351,6 +353,9 @@ With ``CONFIG_KASAN_VMALLOC``, KASAN can cover vmalloc space at the cost of greater memory usage. Currently, this is supported on x86, riscv, s390, and powerpc. +It is optional, except on 64-bit powerpc kernels, and on 32-bit +powerpc kernels with module support, where it is required. + This works by hooking into vmalloc and vmap and dynamically allocating real shadow memory to back the mappings.
--
2.35.3