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arm64: Add sysfs vulnerability show for spectre-v1

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spectre-v1 has been mitigated and the mitigation is always active.
Report this to userspace via sysfs

Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Mian Yousaf Kaukab 2019-04-15 16:21:21 -05:00 committed by Will Deacon
parent e5ce5e7267
commit 3891ebccac
1 changed files with 6 additions and 0 deletions
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6
arch/arm64/kernel/cpu_errata.c
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@ -755,3 +755,9 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
{ {
} }
}; };
ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "Mitigation: __user pointer sanitization\n");
}