Re: [PATCH v4 7/7] powerpc: kcsan: Add KCSAN Support
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From: Christophe Leroy <hidden>
Date: 2023-02-08 12:27:00
Le 08/02/2023 à 04:22, Rohan McLure a écrit :
Enable HAVE_ARCH_KCSAN on all powerpc platforms, permitting use of the kernel concurrency sanitiser through the CONFIG_KCSAN_* kconfig options. KCSAN requires compiler builtins __atomic_* 64-bit values, and so only report support on PPC64.
Copy/pasted from v3 ? In v4 PPC32 is supported as well.
quoted hunk ↗ jump to hunk
See documentation in Documentation/dev-tools/kcsan.rst for more information. Signed-off-by: Rohan McLure <redacted> --- v3: Restrict support to 64-bit, as TSAN expects 64-bit __atomic_* compiler built-ins. --- arch/powerpc/Kconfig | 1 + 1 file changed, 1 insertion(+)diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index b8c4ac56bddc..55bc2d724c73 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig@@ -198,6 +198,7 @@ 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 PPC64
That if PPC64 should go away as we now have the builtins.
select HAVE_ARCH_KFENCE if ARCH_SUPPORTS_DEBUG_PAGEALLOC select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET select HAVE_ARCH_KGDB