On 16 Feb 2023, at 6:14 pm, Christophe Leroy [off-list ref] wrote:



Le 16/02/2023 à 06:09, Rohan McLure a écrit :

quoted

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 <redacted>
---
New patch
---
 arch/powerpc/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 2c9cdf1d8761..45771448d47a 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig

@@ -197,7 +197,7 @@ 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

So that's a followup of a not yet posted version v5 of the other series ?
Why not just add patch 1 in that series and have KCSAN for all powerpc 
at once ?

So the v3 was accepted upstream, likely to appear in 6.3. This patch series is
just to extend support to other platforms, once kcsan supports us.

Link: https://patchwork.ozlabs.org/project/linuxppc-dev/cover/20230206021801.105268-1-rmclure@linux.ibm.com/

quoted

  select HAVE_ARCH_KFENCE if ARCH_SUPPORTS_DEBUG_PAGEALLOC
  select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
  select HAVE_ARCH_KGDB