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Peter Anvin" , "Peter Zijlstra" , Pavan Kumar Paluri Subject: [PATCH v4 0/2] nosnp sev command line support Date: Sat, 21 Sep 2024 22:36:24 -0500 Message-ID: <20240922033626.29038-1-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 SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EE30:EE_|IA0PR12MB8645:EE_ X-MS-Office365-Filtering-Correlation-Id: ec5063f3-3bcb-46bb-e0bd-08dcdab7d566 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|376014|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?pTLicgLOwLnjI6ALVH0MUD641C+jEy6FFehkEw1jwtb9auKONuHe9T9Rr9QE?= =?us-ascii?Q?SBH/LAVqEgELfMM/GnthjPBUFlIRxvKYN1dWyxugwJvxVYB80SQSiIF+VL7d?= =?us-ascii?Q?mM01iMgjzWHxuoe3rSV9EsmWtqE0A4AIaodmQ/uvDcRqqShmHh1BeAy6cm/N?= =?us-ascii?Q?I635cyQSwriqsfgY9JoJmQgTijNmZxwZNEyMS781UTmHh2Ksoz2iDVoIrqjd?= =?us-ascii?Q?X/QfTdotnS1G+0ucmwia2UuHG9tIT/ZHAaQPol/eJcFRZpKC80z2X1KOE3KM?= =?us-ascii?Q?ZB7xvoiiI097ShWuaJqJfArvXwJ4taP2DbLq5rWZ7hkyTiqcrgZigZNRRDeT?= =?us-ascii?Q?kd+Fk9i0HuuptiOnPIYnjINCbSKsmajf4ldvdHR6QY7jZDDFfq6uekcO4ukJ?= =?us-ascii?Q?vBcdmfUP/oolKz/HxKFdfN1h4BUUsDcPYNMAqoHWQjgm645WGPIehHiDORDT?= =?us-ascii?Q?d7Yd42Iv1UOqKv17t4t4nAeDWddgx9UsWGDtq7i6m/OsMPo7/4HHAqIsObIg?= =?us-ascii?Q?26K8TWHc/r9onhIswHhfpQVF4Oo6ffQAq4UPDs0hQZ8taTE5myrTbAtunIW+?= =?us-ascii?Q?+TxqtnfjWZo6nEG6H7X09zY2HgTS6ebZgzioIaTxhmK7HhrlcoXpcZieX7a1?= =?us-ascii?Q?i/iXGqpmvNgQFVOT5GDskFmKUMveMoNpSbaEU+Ahxm72VisiyjC4I3uLRlFE?= =?us-ascii?Q?z5/NsiNpMEyA8qwJv8TGJn8/t8uDAp1t1BXe0S+FYez/zWh1xLXzoP1YYxlc?= =?us-ascii?Q?utHoD5QEN2cxbQSivNypyhqFeEAnxkk6akphYK9zhLhP12pDPFtB8ryjqA7j?= =?us-ascii?Q?G3qKT7uchXYs1eH7U4R7zBfHI7VM4hzS1rudXKIar/BBwSu9Gtr2lRiNTgis?= =?us-ascii?Q?hIUxTiDNRPNKStXPih1hmUFnTG/AWUjbGx+tO1p96i+SbfAzhPVprFkXoW8c?= =?us-ascii?Q?faI2apnpJehYbQDCeYY+C8dwYf+aX4ANGWOlZugkjesfkPz3MVWbOulCamUu?= =?us-ascii?Q?ky6bVQeJm38liBZxloK7n9KWrJNmq1x8ItjAdDlLmCvzZcNi+LzBEq4oMwWB?= =?us-ascii?Q?vCdibjPv8mJr169CJH9MwW3Pox0orkyE1JiEhGEEqwcFlDoJIc+N+vlCBzLF?= =?us-ascii?Q?0jpYG0SnXEeKt3XCDb1JWe9910zIRFFKfk4cDw7ACt7UJ/nhKDEvnwPgLLpm?= =?us-ascii?Q?Er4FnjSXdn2jqqPBxynw5FReV+CdpRdtw+SvelegxA156ea5Pb0qt2snefUh?= =?us-ascii?Q?lOmdRPYAg7FngDPzCCARr0aYCGLeybl2Bglz5GuWqbTv9g0Gia6e12XcwCDj?= =?us-ascii?Q?yDGRd0HSJ4BJ892bY3V/4DZ7tLxjmapGNVeOHU0DEN/no285u7iBI2PKfMtc?= =?us-ascii?Q?dGNZujEUmtwTN5ztAryuKUfre+cXTYafJNKv6hba9Nd2IaZupawhPF5HiXsZ?= =?us-ascii?Q?zOe+YCKwGYVdtYZt7URTgHnzfWZMKRtE47PNWZuLXShBNqr34B6y2w=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)(82310400026)(1800799024)(376014)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Sep 2024 03:37:07.2210 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ec5063f3-3bcb-46bb-e0bd-08dcdab7d566 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: CY4PEPF0000EE30.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8645 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: v3->v4: * Remove an irrelevant header (Boris) * Rebase on latest tip/master v2->v3: * Fix the build warning reported by kernel test robot * https://lore.kernel.org/all/20240905143056.48216-1-papaluri@amd.com/ 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) * https://lore.kernel.org/all/20240903003511.1530454-1-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: 6d3e8e28e20d250d2f3ebb3f5afb63848a2aebf9 -- 2.34.1