Context |
Check |
Description |
snowpatch_ozlabs/apply_patch |
warning
|
Failed to apply on branch powerpc/merge (87d76f542a24ecfa797e9bd3bb56c0f19aabff57)
|
snowpatch_ozlabs/apply_patch |
warning
|
Failed to apply on branch powerpc/next (fbda7904302499dd7ffc073a3c84eb7c9275db0a)
|
snowpatch_ozlabs/apply_patch |
warning
|
Failed to apply on branch linus/master (8b12a62a4e3ed4ae99c715034f557eb391d6b196)
|
snowpatch_ozlabs/apply_patch |
warning
|
Failed to apply on branch powerpc/fixes (cc7a0bb058b85ea03db87169c60c7cfdd5d34678)
|
snowpatch_ozlabs/apply_patch |
warning
|
Failed to apply on branch linux-next (1df27313f50a57497c1faeb6a6ae4ca939c85a7d)
|
snowpatch_ozlabs/apply_patch |
fail
|
Failed to apply to any branch
|
@@ -36,7 +36,8 @@ 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 32-bit powerpc kernels.
+Tag-based KASAN modes are supported only for arm64.
Usage
-----
@@ -334,7 +335,10 @@ CONFIG_KASAN_VMALLOC
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.
+riscv, s390, and 32-bit powerpc.
+
+It is optional, except 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.
new file mode 100644
@@ -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 optional, unless built with modules,
+in which case it is required.