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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 SA2PEPF00001506.mail.protection.outlook.com (10.167.242.38) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7828.19 via Frontend Transport; Thu, 1 Aug 2024 20:56:47 +0000 Received: from ethanolx16dchost.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; Thu, 1 Aug 2024 15:56:46 -0500 From: Pavan Kumar Paluri To: , CC: Borislav Petkov , Thomas Gleixner , "Ingo Molnar" , Dave Hansen , "Eric Van Tassell" , Tom Lendacky , Ashish Kalra , Michael Roth , Brijesh Singh , "H . Peter Anvin" , Peter Zijlstra , "Pavan Kumar Paluri" Subject: [PATCH 0/2] "nosnp" sev command line support Date: Thu, 1 Aug 2024 15:56:36 -0500 Message-ID: <20240801205638.6603-1-papaluri@amd.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain 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: SA2PEPF00001506:EE_|SA3PR12MB7784:EE_ X-MS-Office365-Filtering-Correlation-Id: 290080bb-c5dd-4b03-486f-08dcb26c7529 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|82310400026|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?Y7KAhwLK2ShCIyF1n9Q1D/1TEqzQXVibaDywsZQ07woemFI75/OIDZLtiA64?= =?us-ascii?Q?XQfoxdgyB/FnMpAtVmmvtF279btamfi+dDpQovEm/6LEKnM7bcJGzJJHglak?= =?us-ascii?Q?4QCBiDi8dUihZqRuhOjyx7wCysoQ1x2S0+ldzTtX4kIZq1syOPExmvVD4wmy?= =?us-ascii?Q?fE0xoEuSUwk2Dy1ii9WK9x+oPI7MP/7pBRbZMRC+Si3jb9Ac5pxfqHmDMUbR?= =?us-ascii?Q?ZDHOPrS3FBZoFFUs6tlQCPdy3EMWNtzZyjKVrDI+1+9i2NQrYvNRGb11BNXM?= =?us-ascii?Q?4z3oXMjScQtVKoK4QFwNBeyc0UCzIXCZNiFcoTtYp68SOS5lj/QEQFNMbxZq?= =?us-ascii?Q?S106nlgTsfyJlCvVbje8uqICilPgy+S6gCHySnwolQ0jkWa54t76xq4sAxBT?= =?us-ascii?Q?vslVX8tRnu9ci6YxOtef2w8VjC9YTVCn953ZCei262dhJFMnHrKKMw9GA9gY?= =?us-ascii?Q?PkticlBy95jpdfxp7yhg+uEufpiM+nPnhvUXWh0ZLja3CmmEf/GX3/KI6HJH?= =?us-ascii?Q?fIiUsogma/jfvEYnYF8roUvH+vrT6OF/Dpg+ANCntCyhcoH1XyqMcVrHyaMa?= =?us-ascii?Q?jORmcK0PH96eo4xhbzYMN9qAburOgp+mor6Vi0PbLNcb5vLy84fOcMQBd1Xc?= =?us-ascii?Q?M7Pzt+0O/Pj4AZ4NGGszspemeIacrMOmhWCyJAUS6ENG7G2FHoP4leip8/5B?= =?us-ascii?Q?5JzFbnz4bTZMzdawZLB4YZAz/dv3KZ4LFWdIYyuIMogN6mnTBhvIHu2VWeUU?= =?us-ascii?Q?9VASB7Fns+RnxZzy21Y5gN1bPQ2J129nTlKUAZpwCDYzAUSnSj181zYXZAAg?= =?us-ascii?Q?/KLT9dCw1ziBjjsfIVZGeKXnwv3c8MrnlqJxqAHvHxvUZYN4uDvRqZLFdrhb?= =?us-ascii?Q?4hnLxGbyFel6bI+1Tna1RFeW7PHjbb7ZQedWqRPjXQKPoJfhFOgXf5V7rVd7?= =?us-ascii?Q?kiky6NnqoSa1aWTECgZc/EcNbWjEF1NwLUaXCF6WM/f7UyIqgdYHTXRCcjkv?= =?us-ascii?Q?ZC6W+igDTOyUhiWkHhax9vpQ4XQfIz4v/+++yd9YWTlqWjSTVDxPvag5ariM?= =?us-ascii?Q?a7n12CzSXVK0mzqf5uy+THCzV9O36s/sSfKy/SNasSIT7yS10dyb3SXLcyc9?= =?us-ascii?Q?r84w+Bgewu7TK5meCMXind/ZPs6E0DXBVD2CJoIOXsyk7sQ5q15UIfu0eC5S?= =?us-ascii?Q?tvdzAkPFnDZ0RI3LHWfEkd05vc03yJ6W4C8ZhuY7q1U/FyoOhu8r/n6d4PkQ?= =?us-ascii?Q?Kew60KHfWBHmwfTzKX2EEJ+TouWxOBvi9Odn8LkgYbXo8T6ur1dy+RLWCVju?= =?us-ascii?Q?pSIbVEI1x7VtoQhBIiSRrBrYMICsVgCrEXmU2RFAvrdSVIMeWpyA4Uey7tOO?= =?us-ascii?Q?4UwZvYphiRtnGxpM/zyJs8lKYIkUEGXRE/wjnqoJeQS/BkdO6MCh0qNn+gE2?= =?us-ascii?Q?chWnY2QrWyhjPyg5oCUh+wTlZ5QQp75w?= 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)(376014)(82310400026)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Aug 2024 20:56:47.0838 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 290080bb-c5dd-4b03-486f-08dcb26c7529 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: SA2PEPF00001506.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR12MB7784 Provide "nosnp" boot option via "sev=nosnp" kernel command line to prevent SNP-capable host kernel from enabling SEV-SNP and initializing RMP table. On providing sev=nosnp via kernel command line: cat /sys/module/kvm_amd/parameters/sev_snp should be "N". This patchset is based on tip/master. Any feedback is much appreciated. Pavan --- Pavan Kumar Paluri (2): x86, KVM:SVM: Move sev specific parsing into arch/x86/virt/svm x86 KVM:SVM: Provide "nosnp" boot option for sev kernel command line .../arch/x86/x86_64/boot-options.rst | 3 ++ arch/x86/coco/sev/core.c | 44 ------------------- arch/x86/include/asm/sev-common.h | 27 ++++++++++++ arch/x86/virt/svm/Makefile | 1 + arch/x86/virt/svm/cmdline.c | 38 ++++++++++++++++ 5 files changed, 69 insertions(+), 44 deletions(-) create mode 100644 arch/x86/virt/svm/cmdline.c base-commit: 6d9b02543ea85fcef2595e0a7a63a336ea2ac5e1 -- 2.34.1