| Message ID | 20201201161632.1234753-5-dja@axtens.net (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | KASAN for powerpc64 radix | expand |
| Context | Check | Description |
|---|---|---|
| snowpatch_ozlabs/apply_patch | success | Successfully applied on branch powerpc/merge (78c312324391ee996944e1196123b0060888e189) |
| snowpatch_ozlabs/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 31 lines checked |
| snowpatch_ozlabs/needsstable | success | Patch has no Fixes tags |
Le 01/12/2020 à 17:16, Daniel Axtens a écrit : > KASAN is supported on 32-bit powerpc and the docs should reflect this. > > Document s390 support while we're at it. > > Suggested-by: Christophe Leroy <christophe.leroy@c-s.fr> > Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr> My new address is <christophe.leroy@csgroup.eu> > Signed-off-by: Daniel Axtens <dja@axtens.net> > --- > Documentation/dev-tools/kasan.rst | 7 +++++-- > Documentation/powerpc/kasan.txt | 12 ++++++++++++ > 2 files changed, 17 insertions(+), 2 deletions(-) > create mode 100644 Documentation/powerpc/kasan.txt > > diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst > index 2b68addaadcd..eaf868094a8e 100644 > --- a/Documentation/dev-tools/kasan.rst > +++ b/Documentation/dev-tools/kasan.rst > @@ -19,7 +19,8 @@ out-of-bounds accesses for global variables is only supported since Clang 11. > Tag-based KASAN is only supported in Clang. > > Currently generic KASAN is supported for the x86_64, arm64, xtensa, s390 and > -riscv architectures, and tag-based KASAN is supported only for arm64. > +riscv architectures. It is also supported on 32-bit powerpc kernels. Tag-based > +KASAN is supported only on arm64. > > Usage > ----- > @@ -255,7 +256,9 @@ CONFIG_KASAN_VMALLOC > ~~~~~~~~~~~~~~~~~~~~ > > With ``CONFIG_KASAN_VMALLOC``, KASAN can cover vmalloc space at the > -cost of greater memory usage. Currently this is only supported on x86. > +cost of greater memory usage. Currently this supported on x86, 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. > diff --git a/Documentation/powerpc/kasan.txt b/Documentation/powerpc/kasan.txt > new file mode 100644 > index 000000000000..26bb0e8bb18c > --- /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 optional, unless built with modules, > +in which case it is required. >
diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst index 2b68addaadcd..eaf868094a8e 100644 --- a/Documentation/dev-tools/kasan.rst +++ b/Documentation/dev-tools/kasan.rst @@ -19,7 +19,8 @@ out-of-bounds accesses for global variables is only supported since Clang 11. Tag-based KASAN is only supported in Clang. Currently generic KASAN is supported for the x86_64, arm64, xtensa, s390 and -riscv architectures, and tag-based KASAN is supported only for arm64. +riscv architectures. It is also supported on 32-bit powerpc kernels. Tag-based +KASAN is supported only on arm64. Usage ----- @@ -255,7 +256,9 @@ CONFIG_KASAN_VMALLOC ~~~~~~~~~~~~~~~~~~~~ With ``CONFIG_KASAN_VMALLOC``, KASAN can cover vmalloc space at the -cost of greater memory usage. Currently this is only supported on x86. +cost of greater memory usage. Currently this supported on x86, 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. diff --git a/Documentation/powerpc/kasan.txt b/Documentation/powerpc/kasan.txt new file mode 100644 index 000000000000..26bb0e8bb18c --- /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 optional, unless built with modules, +in which case it is required.