From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.alien8.de (mail.alien8.de [65.109.113.108]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C2A69223316 for ; Fri, 12 Sep 2025 21:02:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=65.109.113.108 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757710944; cv=none; b=Apulsynojm82W/+3YU1XFF8N8cp3mtWnGfA9Q5sJ+YnbS4e0gdIICwLhM0ErVLDXiGvgHyLQ4INf9L2r/Ec80Qby5g7X7RwIkQc81XJyQLrueGyazd7bXgaiP8wq4M+edrIuQ1H57hj/xIxyXi7mr+Dbd9cvHZJWA7FwKx97KSQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757710944; c=relaxed/simple; bh=GMz9+xllyST7cIhbITQMk9tKHdJ0slp/rL9hgA4+46I=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=K1PTr/TYgYsi5xUJlpxxK8cwp1qiOLqwimAoTlKX3+PFyZOASo75HGxxt8JXyoZ5jhXawV8H4IrRGFcOOBc2g5fWpuPX4F/Ll7Nh3xG2p5nze9NSm1GxUe2pXS++JfLeCudhGlwvurT0UVLMz12oL8I2rhuSihV7DgrkOzyyzWw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=alien8.de; spf=pass smtp.mailfrom=alien8.de; dkim=pass (4096-bit key) header.d=alien8.de header.i=@alien8.de header.b=kiNWHG1G; arc=none smtp.client-ip=65.109.113.108 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=alien8.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=alien8.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (4096-bit key) header.d=alien8.de header.i=@alien8.de header.b="kiNWHG1G" Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTP id 561CA40E015C; Fri, 12 Sep 2025 21:02:20 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at mail.alien8.de Authentication-Results: mail.alien8.de (amavisd-new); dkim=pass (4096-bit key) header.d=alien8.de Received: from mail.alien8.de ([127.0.0.1]) by localhost (mail.alien8.de [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id qM5yvJScYERo; Fri, 12 Sep 2025 21:02:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=alien8; t=1757710937; bh=tjDwjUF6W4gKnSGSAp/M3RRbEWfvCsNGQIiPadPWm40=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=kiNWHG1GU0FG0FrmpVczlfeQlISJm0JfA7jXOiaJcL/Esl5w9Ium5WwnoN1MOJ98/ 3/Go0CygRpNOaTw8VdRaUvsOn4kaCZ7Okk6C51G2yYkkGwovUZoqtuPPD0XdzEnV2f CQbz7ig0MNwA1fRME3Xv9swTg6GUx8ZWMvGIXAYzQbE8R43kXnDhaUEL0Dl0TwiNWJ pj0r6k+fNDwi3yVC7c3MOHPgMJW2gYREB6o2Q17fDVOTZA5/NLWxeYNac11+R4Cu2W GXT8iMqCDFVX3jqgxI+myNK9nqXQVE5eclvqXjYRNmdzuhqttLWvtM6wpHwqBYLvIw I5ga8j+xVCHtccniNV+15TcvddU/d7n0LYDHPw4sINLKq+lephCOc3hhb0quikVR/d 57MJBuT8WBrivd8dKccNdrDo5jrnZohErrnKJgakiBBcIR2kvyLERBEt9By+kt4vnA d8mfac7QznpzF5514EIWgRHoGfv4oDB1B010f8eFxkRYvfq3KkUdPfdrQsxCcH+VWd kTluTPkqWpRwXFnEPiEY1L31v0aDTo/xYSVFwfAAqoKS9b300OGv9ieJwb7NgoMBRu RJw+PgBkw8NPbP7N0YltTmcpbz3Ak7aLuUQHvC2/8MNFTglezLT8h1Po+T+smJBa7I 8+8QSMU7NYCnWQFx5aOTs8SM= Received: from zn.tnic (p5de8ed27.dip0.t-ipconnect.de [93.232.237.39]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature ECDSA (P-256) server-digest SHA256) (No client certificate requested) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with UTF8SMTPSA id F027140E0140; Fri, 12 Sep 2025 21:02:07 +0000 (UTC) Date: Fri, 12 Sep 2025 23:02:01 +0200 From: Borislav Petkov To: Michael Roth Cc: Tom Lendacky , linux-kernel@vger.kernel.org, x86@kernel.org, Thomas Gleixner , Ingo Molnar , Dave Hansen , Sean Christopherson , stable@kernel.org Subject: Re: [PATCH] x86/sev: Guard sev_evict_cache() with CONFIG_AMD_MEM_ENCRYPT Message-ID: <20250912210201.GFaMSKSSvK55XIwR3e@fat_crate.local> References: <70e38f2c4a549063de54052c9f64929705313526.1757708959.git.thomas.lendacky@amd.com> <20250912204203.GEaMSFm2-N6lPteue5@fat_crate.local> <20250912204929.pls6245t746gtalr@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20250912204929.pls6245t746gtalr@amd.com> 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