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 117074C9D; Tue, 7 Jan 2025 10:42:55 +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=1736246578; cv=none; b=Kkn/UtGJ+i6By5EP4N4egqn6IqkJt9PpkK1KKZEGUSYqi3jwYZ5RxvgikGuz9OAFDUQTHCVaU6E5fD5nCoZOK+UISjlV//raPm5iZlqoCraOA3OAMoHRbxUpxEEjwedGqGr3/ANife/Hz14Qnunvv/Ln0YmeFiOvRzssJxiYS5s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736246578; c=relaxed/simple; bh=ToQSwTQShmPorM8Uvs5zDG/uK4jQ2rSTdK3g7WMF9vI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=VYIS1fLhA5GUG9ol8APCIEET9BkfswcRDIQmjfDDqqRFfypFUsacbvGh22PYmGWpG/Qf+5TvJ6wxytuGr1epOVrpTXC5kGPD00+90wP7C7pQ1+QtC3mN3GRp4TnrsNdW+7JZ+tmdMfa38abX0NnxModh7yZ5NczDt6FcAlpp4rY= 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=GLh4nNbj; 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="GLh4nNbj" Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTP id ACFDA40E0266; Tue, 7 Jan 2025 10:42:53 +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 W45F-y7Nlb7p; Tue, 7 Jan 2025 10:42:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=alien8; t=1736246565; bh=OhFg4vgi2p2BTMdB2hA5Ldsw3l33CNvIWxuc+0XlQDw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=GLh4nNbjTKruo3pRaAOXNJlcADaBosHY4g7ndTLQTQkzUzfkHIUZYWzLuUO6uPOnS nVQVejYQEBVBgcyWLwd2F6GR5T1aRi7UkW1ROVRfVelJnQGW4JJ/b3+SMytlUy+QUB Q4veydIqz53/KV0EvgdcD/UAwu0Ju29QlpaWLGs33f2SVGW3+/7Bv3a90iXTd6ohp/ jpBtnyDUSed4bSb62txt4BenMYo0Cz3QNZY1tvugRHoQlALQustQG+hmOmMREo2yuY 1+fbmtSNWJ++QFx+7q6jBBeBkljY+5x51fu+SowOTQ7DvfFe7M+9x7yOVGQx3tlROw rb0rp32sSWdXNCK2lwo097Jrbkqy34U1mpVOW3uXl4GbT5iEdQx6gjnO6lG3w7jYF+ FBrp3jwnD5YBo4Fru3uAVPyQ59nS5XtC/oftjHTM40pjrxnHaEdMFRry0xzyz29BEj cWCXPslCl4QtzIuVUu+hcoWcWaRp519E10iosDbepGAwtneA3sA5UNfdDpBeYLHPcw P/HZuLbsWYxB53DvFXnyMXNcF0zFR7ZKuitd47bjSMX1d+vBlDxWwruKxHDkayuWcO zM9fxzGXC16D7N3HRUkJEEjGRIvTHqbh6nlG+/9TpHObObnvaLA9hVJAtHPXn2E2P0 vOnHR0KSlgiP1g3AvQ0sQfVI= Received: from zn.tnic (p200300ea971F93E8329c23ffFEa6a903.dip0.t-ipconnect.de [IPv6:2003:ea:971f:93e8:329c:23ff:fea6:a903]) (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 ESMTPSA id 963D440E0163; Tue, 7 Jan 2025 10:42:33 +0000 (UTC) Date: Tue, 7 Jan 2025 11:42:27 +0100 From: Borislav Petkov To: Nikunj A Dadhania Cc: linux-kernel@vger.kernel.org, thomas.lendacky@amd.com, x86@kernel.org, kvm@vger.kernel.org, mingo@redhat.com, tglx@linutronix.de, dave.hansen@linux.intel.com, pgonda@google.com, seanjc@google.com, pbonzini@redhat.com, francescolavra.fl@gmail.com Subject: Re: [PATCH v16 05/13] x86/sev: Add Secure TSC support for SNP guests Message-ID: <20250107104227.GEZ30FE1kUWP2ArRkD@fat_crate.local> References: <20250106124633.1418972-1-nikunj@amd.com> <20250106124633.1418972-6-nikunj@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: <20250106124633.1418972-6-nikunj@amd.com> On Mon, Jan 06, 2025 at 06:16:25PM +0530, Nikunj A Dadhania wrote: > diff --git a/arch/x86/coco/core.c b/arch/x86/coco/core.c > index 0f81f70aca82..715c2c09582f 100644 > --- a/arch/x86/coco/core.c > +++ b/arch/x86/coco/core.c > @@ -97,6 +97,10 @@ static bool noinstr amd_cc_platform_has(enum cc_attr attr) > case CC_ATTR_GUEST_SEV_SNP: > return sev_status & MSR_AMD64_SEV_SNP_ENABLED; > > + case CC_ATTR_GUEST_SNP_SECURE_TSC: > + return (sev_status & MSR_AMD64_SEV_SNP_ENABLED) && This is new here? > + (sev_status & MSR_AMD64_SNP_SECURE_TSC); > + -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette