Commit 6f0926c0 authored by Rohan McLure's avatar Rohan McLure Committed by Michael Ellerman
Browse files

powerpc/kcsan: Add KCSAN Support 



Enable HAVE_ARCH_KCSAN for 64-bit Book3S, 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 64-bit.

See documentation in Documentation/dev-tools/kcsan.rst for more
information.

Signed-off-by: default avatarRohan McLure <rmclure@linux.ibm.com>
[mpe: Limit to Book3S to avoid build failure on Book3E]
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230206021801.105268-6-rmclure@linux.ibm.com
parent 4f8e0910

arch/powerpc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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 PPC_BOOK3S_64

	select HAVE_ARCH_KFENCE			if ARCH_SUPPORTS_DEBUG_PAGEALLOC

	select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET

	select HAVE_ARCH_KGDB