diff options
| author | Marc Zyngier <marc.zyngier@arm.com> | 2018-07-20 10:56:24 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-22 14:27:41 +0200 |
| commit | e7037bd9fc07329f8a2e6383c65876a35ba33a12 (patch) | |
| tree | 268446a6c11be11ff0142500681304eb3e2f7b57 /arch/arm64/include | |
| parent | d8174bd75c8b9d3ed5598f39f0a3c7050e9cbbe6 (diff) | |
arm64: Add ARCH_WORKAROUND_2 probing
commit a725e3dda1813ed306734823ac4c65ca04e38500 upstream.
As for Spectre variant-2, we rely on SMCCC 1.1 to provide the
discovery mechanism for detecting the SSBD mitigation.
A new capability is also allocated for that purpose, and a
config option.
Reviewed-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/cpucaps.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h index ce67bf6a0886..7010779a1429 100644 --- a/arch/arm64/include/asm/cpucaps.h +++ b/arch/arm64/include/asm/cpucaps.h @@ -36,7 +36,8 @@ #define ARM64_MISMATCHED_CACHE_LINE_SIZE 15 #define ARM64_UNMAP_KERNEL_AT_EL0 16 #define ARM64_HARDEN_BRANCH_PREDICTOR 17 +#define ARM64_SSBD 18 -#define ARM64_NCAPS 18 +#define ARM64_NCAPS 19 #endif /* __ASM_CPUCAPS_H */ |