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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 <[email protected]>
Signed-off-by: Jeremy Linton <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
Reviewed-by: Catalin Marinas <[email protected]>
Tested-by: Stefan Wahren <[email protected]>
Acked-by: Suzuki K Poulose <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
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Mian Yousaf Kaukab authored and wildea01 committed Apr 26, 2019
1 parent e5ce5e7 commit 3891ebc
Showing 1 changed file with 6 additions and 0 deletions.
6 changes: 6 additions & 0 deletions arch/arm64/kernel/cpu_errata.c
Original file line number Diff line number Diff line change
Expand Up @@ -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");
}

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