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Peter Anvin" , "Peter Zijlstra" , Pavan Kumar Paluri Subject: [PATCH v3 0/2] nosnp sev command line support Date: Thu, 5 Sep 2024 09:30:54 -0500 Message-ID: <20240905143056.48216-1-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: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB03.amd.com (10.181.40.144) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF0000231C:EE_|DS0PR12MB7772:EE_ X-MS-Office365-Filtering-Correlation-Id: 40aceb49-d167-4dda-9f1c-08dccdb76467 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|376014|1800799024|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?31FLfLRFtxI0By0YVdVuI+PJJKfPYdy3QV07aVRiaK4O74WMV2ZaHuzjLKgG?= =?us-ascii?Q?4NsXutr0VqERalPB6xd4TMtPf9nFhqgmyvjmYltPQJEcQujf16ZLSESr2WiJ?= =?us-ascii?Q?tuoZfCdM1apt9Swqy5iLtdWlFEvy9l3orjhkO96bBbgP5eq5sMHGXLZvBiUC?= =?us-ascii?Q?mTKpZ3vE/ilMqIBs6i9xm5M2dqLToTdRR1w5UFDs9BGvzhKxyKxblstlzY97?= =?us-ascii?Q?3IrvIM7r7MZavWMqf14543bnOdVHqCs5YcHpTDXwg5v14t/EJpvC25DUIO8n?= =?us-ascii?Q?QnVWjFl816B1M8vyEYlU1Fd8i/s6I9Y7x/jasr5EGhkPHnKOraAdCqHWJ76l?= =?us-ascii?Q?w93mN1Po8KAPqvxG8fu0nMbJoTgUoe2T+NAmlvaUlGKWYenbfSWP1N1Hv64B?= =?us-ascii?Q?cy8BequjEOIGaL1WQxYKCtuwcg9m9KvmpRnOsQHNMlMFCObukCh1ONw2zpre?= =?us-ascii?Q?kW0lqpJZH+Uq+AdFbNm02ASBTfjObbkCja6NUouOqnayFO7bK/apQMUXXkSp?= =?us-ascii?Q?Z5/8Nyv1Ee0a7d0pEC6BgIZtsd5azTRgt/U5nYQJ3H+gajlueZAVGQMb+5P1?= =?us-ascii?Q?4UVt5u46FaYxoiA9O1saZl6DfkHAUEy6PkBZoXlBzCAAmk38ZOTArvXyyXrD?= =?us-ascii?Q?+ey9Oi0Xs0x5dTXrHjNIC7jiXZtavDCtB4OSXsdGdNbWwjNHmgwNNw/2wMqk?= =?us-ascii?Q?J/iv+m1mIzRybC6RQ3SRhZt667oV91A3dkfAgDt8W6hx1mcHAdZTaPep9GIV?= =?us-ascii?Q?edq/wTP9CWViTFInz/b+v1d/D4wh2+5zVVxFTArO9NkR3jBYLRBdZH1SexkT?= =?us-ascii?Q?dMQEJV4b8trQIsSaKdwOEOUrgmnGrDutzC4sUhwuzFVqWlFcz2LZEFLsULi1?= =?us-ascii?Q?Oby6wzx7aJAofSXEW3awHY7dedkUmUg+DbSlVhjiEQWRyGx0+qeDVi6MHZ4k?= =?us-ascii?Q?7ZoaSWR6GTDD6RCT3IBHfvZq/zPonhl4rLgMgOb2RG7wCyt30aW6IxvSZLse?= =?us-ascii?Q?BvcWrUKylPU2Lqs+x/MZEwgiWllExo4m8YpC3zFQBKeoNitRIyDT27SUFFSe?= =?us-ascii?Q?TKnroeb4Yt+EyPXf+o71KTJ2jvRaW7mWcJDTIku7or7SR5pjADEuZWajTVZq?= =?us-ascii?Q?9MguGMduKKSwUSj31sp9K645Uy4AeNqWmVEKgSvqvPeIysC6dKV52Bqqt8jN?= =?us-ascii?Q?7+MGXoi8c/dYAfWRgmbGNb6RKTTIQ2tlnWqT19AoYseG7+1T1qkMMoq2Lg1z?= =?us-ascii?Q?CL1uIY+lo2z2umR0Y89HEqqp/FU3Om6EtxXnll8QVVkmgFLF1q3d7R9i2BTj?= =?us-ascii?Q?a5Htn3Yd6H8aFfRz/ucvvTymtPRcl48OSgQHS4xP5rb7fBDUoCXEtS2LsbLK?= =?us-ascii?Q?jb69zQhOTfvbgRgVWtjMaZLJB3TXTlosX3YHOp3ACjCWYtgCPec6Y5L8JRCQ?= =?us-ascii?Q?1pyvnOZAI0EOZLFpWqAUq/1Hxh6Jj01M?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(36860700013)(376014)(1800799024)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Sep 2024 14:31:12.5583 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 40aceb49-d167-4dda-9f1c-08dccdb76467 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=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF0000231C.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB7772 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: v2->v3: * Fix the build warning reported by kernel test robot v1->v2: * Pick R-b's from Tom. * Include only those headers that provide the necessary definitions (Boris) * Provide appropriate references to SEV, SNP and RMP (Matthew) --- 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 | 30 +++++++++++++ arch/x86/virt/svm/Makefile | 1 + arch/x86/virt/svm/cmdline.c | 39 ++++++++++++++++ 5 files changed, 73 insertions(+), 44 deletions(-) create mode 100644 arch/x86/virt/svm/cmdline.c base-commit: 566644cc51d0b1ab7e98ea479808b1efd0bbe261 -- 2.34.1