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Tsirkin" , James Bottomley , "Dr . David Alan Gilbert" , Tom Lendacky , Paolo Bonzini , David Gibson , =?UTF-8?Q?Daniel_P=2e_Berrang=c3=a9?= , kvm@vger.kernel.org, Michael Roth , Eduardo Habkost Subject: Re: [RFC PATCH 3/6] i386/sev: initialize SNP context To: Dov Murik , qemu-devel@nongnu.org References: <20210709215550.32496-1-brijesh.singh@amd.com> <20210709215550.32496-4-brijesh.singh@amd.com> <34b8bda5-9b4d-c1e0-0009-1a407a48dd4a@linux.ibm.com> From: Brijesh Singh Message-ID: <4de32b0f-d4f7-33a8-3678-dca68cc8bfca@amd.com> Date: Thu, 15 Jul 2021 08:24:25 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 In-Reply-To: <34b8bda5-9b4d-c1e0-0009-1a407a48dd4a@linux.ibm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SA9PR11CA0018.namprd11.prod.outlook.com (2603:10b6:806:6e::23) To SN6PR12MB2718.namprd12.prod.outlook.com (2603:10b6:805:6f::22) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [10.236.31.95] (165.204.77.1) by SA9PR11CA0018.namprd11.prod.outlook.com (2603:10b6:806:6e::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4331.21 via Frontend Transport; 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envelope-from=brijesh.singh@amd.com; helo=NAM04-BN8-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 7/15/21 4:32 AM, Dov Murik wrote: > > Just making sure I understand: > > * sev_enabled() returns true for SEV or newer (SEV or SEV-ES or > SEV-SNP). > * sev_es_enabled() returns true for SEV-ES or newer (SEV-ES or SEV-SNP). > * sev_snp_enabled() returns true for SEV-SNP or newer (currently only > SEV-SNP). > > Is that indeed the intention? > Yes. The SEV-SNP support requires the SEV and SEV-ES to be enabled. See the text from the APM vol2 section 15.36. The SEV-SNP features enable additional protection for encrypted VMs designed to achieve stronger isolation from the hypervisor. SEV-SNP is used with the SEV and SEV-ES features described in Section 15.34 and Section 15.35 respectively and requires the enablement and use of these features. thanks