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

[Suzuki K Poulose]

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>