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Peter Anvin" , "Peter Zijlstra" , Pavan Kumar Paluri Subject: [PATCH v5 0/2] nosnp sev command line support Date: Mon, 30 Sep 2024 18:11:00 -0500 Message-ID: <20240930231102.123403-1-papaluri@amd.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH1PEPF0000A348:EE_|IA1PR12MB7662:EE_ X-MS-Office365-Filtering-Correlation-Id: 41444f19-1781-4220-cd13-08dce1a52c5a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|36860700013|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?33M6DxegdKdWvINeiQTpxrtoUIJs+SaFGd5V4PrwR2nIQcrs25wlmOPHtY+/?= =?us-ascii?Q?prOPTxMYU/02BCGsShpCGgxp2QbrWgJs7ZSK1+uJxGmzmgVKVXg12EMuSjlR?= =?us-ascii?Q?zuEjjwzRA/H5DaTlnhslOO7bLko2AAEO/nhflHlw/NN/98aB/rA0T0L67WPj?= =?us-ascii?Q?ug2et78BrllD0NX0/bVWRaqouqpVnx0RsXb2wS6dtpyyi77wB+5qRFjRUY/l?= =?us-ascii?Q?U1LihzzZ0p0BMOXdOpCkd7uTrdMALvpnqhueEOVtOJ2E8rtjxZGTBMBxvqld?= =?us-ascii?Q?R1ruv2mMf17DYuHospRXdmva06cP/W/4p+UAQR9ey5CkEC1y+5mcX15pWpqN?= =?us-ascii?Q?SxtuKi1jSGKSfegRfriwW1aMvibkaEccAfmpxDVrBb8/8raVsrv+qmSLurfd?= =?us-ascii?Q?k/aOPXQLIvIM4cGYgGyc8RoEaCVr+GUbK+9tGIxQYtXZpKIkeKawdipXgBAM?= =?us-ascii?Q?A5XosBPRxVD8hlZ6TdVxsMS5jLYbGik946vum6YlUgyXJr407LWS5d+24Idk?= =?us-ascii?Q?17RUNreaV2DMSDcOeP/DUXfDoLOJF39nmA6YyqkatLVtyQqPRMLzpU68VaKx?= =?us-ascii?Q?LjAHLr+KH/GFE/thXQb4fGM/pP+o2789E/BUvCuC6qW8OSkEINPz4jM++G3s?= =?us-ascii?Q?ZXtXAVHly4G+JjOHKmdg01wws/P3Xkaac06dTEKR/k4HkjtgSpgO4rPT6+AF?= =?us-ascii?Q?JMRtV24npRsrAW+O61hDefvt/uPyjAY25NPW4u/zCik3CdvZ5uvRWYtlwO/E?= =?us-ascii?Q?Uq1cVc0jDYu9EQ2Bs17yTkVs2DCMKw8jIHY7R+y6ggolqvY8budJXhSDAgia?= =?us-ascii?Q?u2j3X/VyCCqJyvpUcUbkhwzceI5JxMUl28nmSczsQxnvhWfru3K2Rqs3w+Cp?= =?us-ascii?Q?urkz5e8gBA9HNPxEzu7ewxixQ/0WpD4h11cL6ovfC9Gn95coJvNMnkpl+uPZ?= =?us-ascii?Q?9QGOMS6s+Ts8VGjGZG+mpPrmu5e9EV+xGotFfdeg063tAVy0PNrc2w3mBpco?= =?us-ascii?Q?s8NrSo5xdc1/cBc9UR3I+eT/4EpuJzkjZdWCN3hGIERLEJdECuOxf1vCV59F?= =?us-ascii?Q?HjxdUeFvLD0qO0LOB3d/VNICeSyse4gA5L0tqwuI8VfuC4pl6QZnmKk9jjLI?= =?us-ascii?Q?3R1rroHckwV1dowjPNsF4OY+QhpQ9aiWzoiQhn4GlRQtnzlX27I/NMLC/f1R?= =?us-ascii?Q?k7vMQ+HQqGyM6Q1dEowMMFQtobj2CVVSif9Suhvz6LQcgZ2bGVlQFbHYQHP2?= =?us-ascii?Q?+nZ03unR/EHVxM6PngASViHgbYXSc/c6if2zyHGUvVMspp8wjLIx50aa36aA?= =?us-ascii?Q?wSykgHhbpVwnpxP200glja7upHSy8QPJEo2O7+nUavm2mwzAJNA/cobVQdFn?= =?us-ascii?Q?5LjEvocM06tyoD2TT+U721R7sG5N7p6Tyaa2Pq/jDzCr2w9OFpLNafYmUEqL?= =?us-ascii?Q?jYRyguxnxH2KQPHBCF1ue2XejX/GwIZjZ9+1gFEhqsuCCztiUjqjIA=3D=3D?= 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)(376014)(1800799024)(36860700013)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Sep 2024 23:11:10.8832 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 41444f19-1781-4220-cd13-08dce1a52c5a 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: CH1PEPF0000A348.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB7662 Provide "nosnp" boot option via "sev=nosnp" kernel command line to prevent SEV-SNP[1] capable host kernel from enabling SEV-SNP and initializing Reverse Map Table (RMP) [1]. 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. Reference: [1] https://www.amd.com/content/dam/amd/en/documents/processor-tech-docs/programmer-references/24593.pdf Changelog: ========= v4->v5: * Move __read_mostly attribute to place where sev_cfg is declared (Tom) v3->v4: * Remove an irrelevant header (Boris) * Rebase on latest tip/master * Link: https://lore.kernel.org/all/20240922033626.29038-1-papaluri@amd.com/ 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 | 29 ++++++++++++ arch/x86/virt/svm/Makefile | 1 + arch/x86/virt/svm/cmdline.c | 39 ++++++++++++++++ 5 files changed, 72 insertions(+), 44 deletions(-) create mode 100644 arch/x86/virt/svm/cmdline.c base-commit: d1b8f40d000887720e0c123c382d75e7fbb75cb6 -- 2.34.1