From: Mian Yousaf Kaukab <[email protected]> [ Upstream commit 3891ebccace188af075ce143d8b072b65e90f695 ]
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]> Signed-off-by: Ard Biesheuvel <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/arm64/kernel/cpu_errata.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -729,3 +729,9 @@ const struct arm64_cpu_capabilities arm6 { } }; + +ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "Mitigation: __user pointer sanitization\n"); +}
