From patchwork Wed Feb 19 20:54:42 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kalra, Ashish" X-Patchwork-Id: 13982936 X-Patchwork-Delegate: herbert@gondor.apana.org.au Received: from NAM11-CO1-obe.outbound.protection.outlook.com (mail-co1nam11on2086.outbound.protection.outlook.com [40.107.220.86]) (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 C6D1F24E4B4; Wed, 19 Feb 2025 20:55:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.220.86 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739998503; cv=fail; b=DVFnjzIv8Ik0lRBSmODMYDe05PIlqL7uR5JjyQrgsiyFiPa4rcj9qiBLEfS+5p/i/4J6adYqkioc/I+Y8g+m14sqju6uQX2gB39UFhhhGJPMoMIwvJo9LW54Q09srCdAUxCySYuV+4ZY45AxzAU61870gzoRyCQXMa53yukJw2k= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739998503; c=relaxed/simple; bh=iGVKnAsE1ba95GWCRw58c/50CmL9pjDOget8VIkoeU0=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=QETh07e4j6iNI9/8wa7YSgO1LJII7shL7hH5qOdXPIRZGav99sSrh4uyWliAtjaw+DDpYOWrRsjgj+nyJjscxFmUAUBkUA6po/FA1z4kH8DmaXaLCSIUtfjSkdwAtAWuNQeWt+Y03NEsZybhpNW7Nim0aWY36ojrI49RR+UazG4= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b=Bv21L0lU; arc=fail smtp.client-ip=40.107.220.86 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="Bv21L0lU" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=xISBvrI+wmknMchk0YHJb3t7aWTF4G+yUoKqXbGrDAHmf97z491q5EWNkiGPgPGeZr2LfN5uG4RTlqqZquVozMzu7nBM757VFLQg162H3pmezOpOWGAZoJqDJea9+ghKt3tn32ikcZ2j+dKhAiK+/t+pyoE3osO+NMMnfksdxNJKR0PDrUzj+F/tyE95GWuNYQQfjmaMIbUWPTNAHNOpmlJ4Gz+kmvAIXhleoWJJqI1S/y2Zw3fql9NLkLLYyb4MUC8+v1w8GwtqnmB0VSBi+onyN8sjzeTeLjAF0eWGkpNuwqp37CZhQs1SY654iLjdCG0HxmuELl21S/609PSmIg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=WihQCoGliPJv20KI8JNgvXzX95k2sNXJNrEBuEfF0RI=; b=oABhEdj51cVI3LJ5o/0jIcClDUtR7wZ9+Co7Oba1VLnSc2TXJSBeR8CDwMcfOEbNrTL3Mr4JnnH7QwC6brnix7Aux1gAwak+iyiwaQlh52fkPlsfkmAh21meaA6BWwYvw5gfir8bxYk0g3DNYM0kVBEYzQAR7HDxxmyVqWTJUJ2JYG5TNNjU9HODTySnOF+iO5a8ozjXP0DYem8EK61SQ9L067ZhhSDlDwgdx8PLTHYMLID//Rlj3tzWkcsz/1wYDXkTjJHrmoTfJbkWkz8jfdiksRh9aQi9y1Fomby0W3QSOPsvWOAMcc/HFvk4TK6dw4k/Inlm7L0Ou2Y8Bcqolw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=google.com smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=WihQCoGliPJv20KI8JNgvXzX95k2sNXJNrEBuEfF0RI=; b=Bv21L0lUx8Rwd2tW990bF6avWv2qA+4VCxZJuJ1/9g7JATlIkBb55PRR6U611JqRIe9+GWgd/K8v2oQQIEfNAnqECuFp9fexrrvgS/NN4uknFa4KqT7+kPrPx3iWsPtCjpDBMItRs4BKWelV+VRQNM9DEsQ+CVTTwRyacdrkZHs= Received: from SA0PR13CA0020.namprd13.prod.outlook.com (2603:10b6:806:130::25) by DS0PR12MB7778.namprd12.prod.outlook.com (2603:10b6:8:151::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8466.14; Wed, 19 Feb 2025 20:54:53 +0000 Received: from SA2PEPF00003F68.namprd04.prod.outlook.com (2603:10b6:806:130:cafe::e4) by SA0PR13CA0020.outlook.office365.com (2603:10b6:806:130::25) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8466.14 via Frontend Transport; Wed, 19 Feb 2025 20:54:53 +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 SA2PEPF00003F68.mail.protection.outlook.com (10.167.248.43) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8466.11 via Frontend Transport; Wed, 19 Feb 2025 20:54:52 +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; Wed, 19 Feb 2025 14:54:51 -0600 From: Ashish Kalra To: , , , , , , , , , , CC: , , , , , , , , , , Subject: [PATCH v4 6/7] KVM: SVM: Add support to initialize SEV/SNP functionality in KVM Date: Wed, 19 Feb 2025 20:54:42 +0000 Message-ID: <5346a666758c21ec25d26ae184a2d1a9324f3b55.1739997129.git.ashish.kalra@amd.com> 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: SA2PEPF00003F68:EE_|DS0PR12MB7778:EE_ X-MS-Office365-Filtering-Correlation-Id: b63c6abe-502b-4ae8-024f-08dd5127a89b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700013|82310400026|7416014|376014|7053199007|921020; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(1800799024)(36860700013)(82310400026)(7416014)(376014)(7053199007)(921020);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Feb 2025 20:54:52.9846 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b63c6abe-502b-4ae8-024f-08dd5127a89b 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: SA2PEPF00003F68.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB7778 From: Ashish Kalra Move platform initialization of SEV/SNP from PSP driver probe time to KVM module load time so that KVM can do SEV/SNP platform initialization explicitly if it actually wants to use SEV/SNP functionality. Add support for KVM to 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. Suggested-by: Sean Christopherson Signed-off-by: Ashish Kalra Reviewed-by: Tom Lendacky --- arch/x86/kvm/svm/sev.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 74525651770a..213d4c15a9da 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -2933,6 +2933,7 @@ 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; @@ -3059,6 +3060,17 @@ 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; + + /* + * NOTE: Always do SNP INIT regardless of sev_snp_supported + * as SNP INIT has to be done to launch legacy SEV/SEV-ES + * VMs in case SNP is enabled system-wide. + */ + init_args.probe = true; + sev_platform_init(&init_args); } void sev_hardware_unsetup(void) @@ -3074,6 +3086,9 @@ 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 and SNP Shutdown */ + sev_platform_shutdown(); } int sev_cpu_init(struct svm_cpu_data *sd)