linux-kernel - Re: [patch V2 1/2] sysfs/cpu: Add vulnerability folder

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Message-ID: <12f6bdbe-3fbb-7e12-50ee-dc7b2575d9d5@jonmasters.org>
Date:   Mon, 29 Jan 2018 00:30:35 -0500
From:   Jon Masters <jcm@...masters.org>
To:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     Linus Torvalds <torvalds@...uxfoundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...en8.de>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Dave Hansen <dave.hansen@...el.com>,
        Will Deacon <will.deacon@....com>
Subject: Re: [patch V2 1/2] sysfs/cpu: Add vulnerability folder

On 01/07/2018 04:48 PM, Thomas Gleixner wrote:

> +#ifdef CONFIG_GENERIC_CPU_VULNERABILITIES
> +
> +ssize_t __weak cpu_show_meltdown(struct device *dev,
> +				 struct device_attribute *attr, char *buf)
> +{
> +	return sprintf(buf, "Not affected\n");
> +}
> +
> +ssize_t __weak cpu_show_spectre_v1(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	return sprintf(buf, "Not affected\n");
> +}
> +
> +ssize_t __weak cpu_show_spectre_v2(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	return sprintf(buf, "Not affected\n");
> +}

Just wondering aloud (after the merge) here but shouldn't the default be
"unknown", at least for Spectre? It's pervasive enough.

Jon.