Commit 3891ebcc authored Apr 15, 2019 by Mian Yousaf Kaukab Committed by Will Deacon Apr 26, 2019

arm64: Add sysfs vulnerability show for spectre-v1



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>

parent e5ce5e72

arch/arm64/kernel/cpu_errata.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -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");
		}