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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/Kconfig | |
| parent | 5cf9ce6e5ea50f805c6188c04ed0daaec7b6887d (diff) | |
| download | lwn-a725e3dda1813ed306734823ac4c65ca04e38500.tar.gz lwn-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/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 3aed13626fd7..0b98a6c42454 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -940,6 +940,15 @@ config HARDEN_EL2_VECTORS If unsure, say Y. +config ARM64_SSBD + bool "Speculative Store Bypass Disable" if EXPERT + default y + help + This enables mitigation of the bypassing of previous stores + by speculative loads. + + If unsure, say Y. + menuconfig ARMV8_DEPRECATED bool "Emulate deprecated/obsolete ARMv8 instructions" depends on COMPAT |