arm64: Add sysfs vulnerability show for spectre-v1
[ Upstream commit 3891ebccace188af075ce143d8b072b65e90f695 ] spectre-v1 has been mitigated and the mitigation is always active. Report this to userspace via sysfs Signed-off-by: NMian Yousaf Kaukab <ykaukab@suse.de> Signed-off-by: NJeremy Linton <jeremy.linton@arm.com> Reviewed-by: NAndre Przywara <andre.przywara@arm.com> Reviewed-by: NCatalin Marinas <catalin.marinas@arm.com> Tested-by: NStefan Wahren <stefan.wahren@i2se.com> Acked-by: NSuzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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