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| author |   Marc Zyngier <marc.zyngier@arm.com> | 2018-05-29 13:11:08 +0100 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2018-05-31 17:34:38 +0100 |
| commit | a725e3dda1813ed306734823ac4c65ca04e38500 (patch) | |
| tree | 921b44e586ea91ce97beb07ce6d59979d8fd9bc2 /arch/arm64/include/asm/cpucaps.h | |
| parent | arm64: Add per-cpu infrastructure to call ARCH_WORKAROUND_2 (diff) | |
| download | linux-dev-a725e3dda1813ed306734823ac4c65ca04e38500.tar.xz linux-dev-a725e3dda1813ed306734823ac4c65ca04e38500.zip | |
arm64: Add ARCH_WORKAROUND_2 probing
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>
Diffstat (limited to 'arch/arm64/include/asm/cpucaps.h')
| -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 bc51b72fafd4..8a699c708fc9 100644 --- a/arch/arm64/include/asm/cpucaps.h +++ b/arch/arm64/include/asm/cpucaps.h @@ -48,7 +48,8 @@ #define ARM64_HAS_CACHE_IDC 27 #define ARM64_HAS_CACHE_DIC 28 #define ARM64_HW_DBM 29 +#define ARM64_SSBD 30 -#define ARM64_NCAPS 30 +#define ARM64_NCAPS 31 #endif /* __ASM_CPUCAPS_H */ |