linux-kernel - Re: [PATCH v6 21/21] cpu: Show attack vectors in sysfs

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Message-ID: <20250709184744.GAaG65UAiz8L57MefB@fat_crate.local>
Date: Wed, 9 Jul 2025 20:47:44 +0200
From: Borislav Petkov <bp@...en8.de>
To: David Kaplan <david.kaplan@....com>
Cc: Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Josh Poimboeuf <jpoimboe@...nel.org>,
	Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
	Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	"H . Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 21/21] cpu: Show attack vectors in sysfs

On Mon, Jul 07, 2025 at 01:33:16PM -0500, David Kaplan wrote:
> Show the status of currently mitigated attack vectors in
> /sys/devices/system/cpu/vector_mitigations/.

Right, as discussed offlist, let's delay that one for now.

The question is: should this rather be inside
/sys/devices/system/cpu/vulnerabilities/, as it belongs there conceptually?

I wanted to have a subdir:

/sys/devices/system/cpu/vulnerabilities/vectors/

but that needs a bit more glue to create the struct device, etc. Not sure if
we need all that.

And the sysfs stuff needs documentation in Documentation/ABI/...

So, let's discuss this properly first as it is user-visible and then do it
when everyone agrees. It can go in later as it is only informational anyway.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette