Re: [PATCH v5 02/10] arm64: add sysfs vulnerability show for spectre v1

From: Suzuki K Poulose
Date: Thu Feb 28 2019 - 13:29:31 EST




On 27/02/2019 01:05, Jeremy Linton wrote:
From: Mian Yousaf Kaukab <ykaukab@xxxxxxx>

spectre v1, has been mitigated, and the mitigation is
always active.

Signed-off-by: Mian Yousaf Kaukab <ykaukab@xxxxxxx>
Signed-off-by: Jeremy Linton <jeremy.linton@xxxxxxx>
---
arch/arm64/kernel/cpu_errata.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index d2b2c69d31bb..ad58958becb6 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -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");
+}


minor nit: This could possibly have been in the cpufeature.c, where we keep
the spectre_v2 routine.

Either way,

Acked-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>