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Peter Anvin" , Ingo Molnar , "Mario Limonciello" , Thomas Gleixner , , Yazen Ghannam CC: Jason Andryuk , , Penny Zheng Subject: [PATCH v2 0/2] x86/amd_node: Fixes for virtualized systems Date: Fri, 14 Aug 2026 17:42:51 -0400 Message-ID: <20260814214255.83127-1-jason.andryuk@amd.com> X-Mailer: git-send-email 2.55.0 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-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN3PEPF0000B076:EE_|MN6PR12MB8516:EE_ X-MS-Office365-Filtering-Correlation-Id: 05c4e116-cef3-4ca9-071a-08defa4d0c76 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|36860700016|376014|23010399003|18002099003|11063799006|56012099006|10067099003; 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:NLI;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(1800799024)(82310400026)(36860700016)(376014)(23010399003)(18002099003)(11063799006)(56012099006)(10067099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: ofSJthknx7eWlZFIdFa9SES4AOvjlp/DRRI/lfW3SID2/J6xlfKGtG9P0NRXHg7YLhC7WvW9MUeL2lDznm+SHzl6GNhhdpD68FzT6/wSp2XuV/bLnLk3L7QtP6KJHSWEeGbuSbdPCAdGxflA/KXxTmMmUx2hVrUe/VJxccu4KdET54UhzH+5+z06Fi+SCceLscjpMqF6PX04TPrD8n2UnGY8x9L1mw1CdgxCjCUdpmIpKhOZWngRvPxGegVdV3XuaovKl9ywMtk9Uq7oNOJyJAgrs/dNXfA9JglifPF4QJujlUhdawUK4yZiJXCnpYOI+8nfrsNtdzbgQqyMzaJf9BSu20cS864sUeZJJybttzOav/7KW8Pu+phMPC4Wjchh4RBMLLDwh0nJpYIWJvnr5V7n0FoWh/kdR78Tf+dgij5fVZCp75IzgaZU8Qmynqr9 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Aug 2026 21:43:16.1266 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 05c4e116-cef3-4ca9-071a-08defa4d0c76 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=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN3PEPF0000B076.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN6PR12MB8516 For v2, swap the patch order. On my test system, I see SMN accesses from: amd_pmf_probe() - read amd_pmc_probe() - read acp_acp70_audio_probe() - write Jason Andryuk (2): x86/amd_node: Avoid divide by zero on virtualized systems x86/amd_node: Remove smn_exclusive arch/x86/kernel/amd_node.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) -- 2.55.0