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Mon, 9 Dec 2024 23:26:30 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by SA2PEPF00003F64.mail.protection.outlook.com (10.167.248.39) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8230.7 via Frontend Transport; Mon, 9 Dec 2024 23:26:30 +0000 Received: from ethanolx7e2ehost.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Mon, 9 Dec 2024 17:26:29 -0600 From: Ashish Kalra To: , , , , , , , , , , , CC: , , , , , Subject: [PATCH 6/7] KVM: SVM: Add support to initialize SEV/SNP functionality in KVM Date: Mon, 9 Dec 2024 23:26:20 +0000 Message-ID: X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF00003F64:EE_|DS7PR12MB9526:EE_ X-MS-Office365-Filtering-Correlation-Id: 34a8658f-cbee-48d1-c3e8-08dd18a8e98c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|82310400026|36860700013|1800799024|921020; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Dec 2024 23:26:30.7586 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 34a8658f-cbee-48d1-c3e8-08dd18a8e98c X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF00003F64.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB9526 From: Ashish Kalra Remove platform initialization of SEV/SNP from PSP driver probe time and move it to KVM module load time so that KVM can do SEV/SNP platform initialization explicitly if it actually wants to use SEV/SNP functionality. With this patch, KVM will explicitly call into the PSP driver at load time to initialize SEV/SNP by default but this behavior can be altered with KVM module parameters to not do SEV/SNP platform initialization at module load time if required. Additionally SEV/SNP platform shutdown is invoked during KVM module unload time. Signed-off-by: Ashish Kalra --- arch/x86/kvm/svm/sev.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 72674b8825c4..ffb5c907c5bb 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -2966,6 +2966,7 @@ void __init sev_set_cpu_caps(void) void __init sev_hardware_setup(void) { unsigned int eax, ebx, ecx, edx, sev_asid_count, sev_es_asid_count; + struct sev_platform_init_args init_args = {0}; bool sev_snp_supported = false; bool sev_es_supported = false; bool sev_supported = false; @@ -3082,6 +3083,13 @@ void __init sev_hardware_setup(void) sev_supported_vmsa_features = 0; if (sev_es_debug_swap_enabled) sev_supported_vmsa_features |= SVM_SEV_FEAT_DEBUG_SWAP; + + if (!sev_enabled) + return; + + /* Do SEV/SNP INIT */ + init_args.probe = true; + sev_platform_init(&init_args); } void sev_hardware_unsetup(void) @@ -3097,6 +3105,9 @@ void sev_hardware_unsetup(void) misc_cg_set_capacity(MISC_CG_RES_SEV, 0); misc_cg_set_capacity(MISC_CG_RES_SEV_ES, 0); + + /* Do SEV/SNP Shutdown */ + sev_platform_shutdown(); } int sev_cpu_init(struct svm_cpu_data *sd)