linux-kernel - Re: [PATCH] x86/bugs: Qualify RETBLEED_INTEL

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Message-ID: <20251006140442.GDaOPMemqB7SRJSHWL@fat_crate.local>
Date: Mon, 6 Oct 2025 16:04:42 +0200
From: Borislav Petkov <bp@...en8.de>
To: "Kaplan, David" <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" <x86@...nel.org>,
	"H . Peter Anvin" <hpa@...or.com>,
	Klaus Kusche <klaus.kusche@...puterix.info>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86/bugs: Qualify RETBLEED_INTEL_MSG

On Mon, Oct 06, 2025 at 01:58:55PM +0000, Kaplan, David wrote:
> Sounds rather yucky. 

I'll give it a try at some point and see how ugly it becomes...

> What about just not calling cpu_select_mitigations() if
> CONFIG_CPU_MITIGATIONS=n?  Then you won't get any print messages either I'd
> think.

I want to not compile in that code at all if CPU_MITIGATIONS=off, actually.

-- 
Regards/Gruss,
    Boris.

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