powerpc/{32,book3e}: kcsan: Extend KCSAN Support

Enable HAVE_ARCH_KCSAN on all powerpc platforms, permitting use of the
kernel concurrency sanitiser through the CONFIG_KCSAN_* kconfig options.

Boots and passes selftests on 32-bit and 64-bit platforms. See
documentation in Documentation/dev-tools/kcsan.rst for more information.

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Marco Elver <elver@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/1a1138966780c3709f55bde8a0eb80209fa4395d.1683892665.git.christophe.leroy@csgroup.eu

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index bff5820b7cda14714f6b76da3bac2de92c8f740f..9111daf9d5f5e1871c0cb49b55e959bd88c3d579 100644 (file)
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -211,7 +211,7 @@ config PPC
        select HAVE_ARCH_KASAN                  if PPC_RADIX_MMU
        select HAVE_ARCH_KASAN                  if PPC_BOOK3E_64
        select HAVE_ARCH_KASAN_VMALLOC          if HAVE_ARCH_KASAN
-       select HAVE_ARCH_KCSAN                  if PPC_BOOK3S_64
+       select HAVE_ARCH_KCSAN
        select HAVE_ARCH_KFENCE                 if ARCH_SUPPORTS_DEBUG_PAGEALLOC
        select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
        select HAVE_ARCH_WITHIN_STACK_FRAMES