| Message ID | 20230206021801.105268-6-rmclure@linux.ibm.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 6f0926c00565a91f3bd7ca1aa05db307daed5e0f |
| Headers | show |
| Series | powerpc: Add KCSAN support | expand |
| Context | Check | Description |
|---|---|---|
| snowpatch_ozlabs/github-powerpc_ppctests | success | Successfully ran 8 jobs. |
| snowpatch_ozlabs/github-powerpc_selftests | success | Successfully ran 8 jobs. |
| snowpatch_ozlabs/github-powerpc_sparse | success | Successfully ran 4 jobs. |
| snowpatch_ozlabs/github-powerpc_clang | success | Successfully ran 6 jobs. |
| snowpatch_ozlabs/github-powerpc_kernel_qemu | success | Successfully ran 24 jobs. |
Le 06/02/2023 à 03:18, 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. > > See documentation in Documentation/dev-tools/kcsan.rst for more > information. > > Signed-off-by: Rohan McLure <rmclure@linux.ibm.com> > --- > v3: Restrict support to 64-bit, as TSAN expects 64-bit __atomic_* compiler > built-ins. Support for PPC32 should be kept. See commit 725aea873261 ("xtensa: enable KCSAN") xtensa is a 32 bits architecture, they have implemented stubs for 64-bit atomics. Maybe those stubs should be made generic by moving them into kernel/kcsan/ and building them for all 32 bit architectures. Christophe > --- > 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 > select HAVE_ARCH_KFENCE if ARCH_SUPPORTS_DEBUG_PAGEALLOC > select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET > select HAVE_ARCH_KGDB
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 select HAVE_ARCH_KFENCE if ARCH_SUPPORTS_DEBUG_PAGEALLOC select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET select HAVE_ARCH_KGDB
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. See documentation in Documentation/dev-tools/kcsan.rst for more information. Signed-off-by: Rohan McLure <rmclure@linux.ibm.com> --- v3: Restrict support to 64-bit, as TSAN expects 64-bit __atomic_* compiler built-ins. --- arch/powerpc/Kconfig | 1 + 1 file changed, 1 insertion(+)