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

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Message-ID: <20250912204203.GEaMSFm2-N6lPteue5@fat_crate.local>
Date: Fri, 12 Sep 2025 22:42:03 +0200
From: Borislav Petkov <bp@...en8.de>
To: Tom Lendacky <thomas.lendacky@....com>
Cc: 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>,
	Michael Roth <michael.roth@....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 03:29:19PM -0500, Tom Lendacky wrote:
> The sev_evict_cache() is guest-related code and should be guarded by
> CONFIG_AMD_MEM_ENCRYPT, not CONFIG_KVM_AMD_SEV. Move the function
> declarations under the appropriate #ifdef.
> 
> Fixes: 7b306dfa326f ("x86/sev: Evict cache lines during SNP memory validation")
> Cc: <stable@...nel.org>

Do we really want this in stable?

I haven't seen any breakages from it...

-- 
Regards/Gruss,
    Boris.

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