linux-kernel - Re: [PATCH] x86/sev: Guard sev_evict_cache() with CONFIG_AMD_MEM

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Message-ID: <20250912210201.GFaMSKSSvK55XIwR3e@fat_crate.local>
Date: Fri, 12 Sep 2025 23:02:01 +0200
From: Borislav Petkov <bp@...en8.de>
To: Michael Roth <michael.roth@....com>
Cc: Tom Lendacky <thomas.lendacky@....com>, linux-kernel@...r.kernel.org,
	x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Sean Christopherson <seanjc@...gle.com>, stable@...nel.org
Subject: Re: [PATCH] x86/sev: Guard sev_evict_cache() with
 CONFIG_AMD_MEM_ENCRYPT

On Fri, Sep 12, 2025 at 03:49:29PM -0500, Michael Roth wrote:
> I think that's actually the concerning thing. If someone built a guest
> kernel with CONFIG_KVM_AMD_SEV=y they might be under the impression that
> this is performing evictions when it's actually just a stub function.

That sooo needs to be in the commit message...

-- 
Regards/Gruss,
    Boris.

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