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client-ip=165.204.84.17; helo=satlexmb07.amd.com; pr=C Received: from satlexmb07.amd.com (165.204.84.17) by SJ1PEPF00002324.mail.protection.outlook.com (10.167.242.87) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9160.9 via Frontend Transport; Tue, 30 Sep 2025 16:47:24 +0000 Received: from [127.0.1.1] (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Tue, 30 Sep 2025 09:47:23 -0700 From: Yazen Ghannam Subject: [PATCH 0/2] AMD root search fix Date: Tue, 30 Sep 2025 16:45:44 +0000 Message-ID: <20250930-fix-amd-root-v1-0-ce28731c349f@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIADgJ3GgC/x3MQQrCQAyF4auUrA1OIy3Wq4iLtI024GQkKSKU3 t3R5cfj/RuEuErApdnA5a2hxSraQwPTwvYQ1LkaKFGXhlPCu36Q84xeyorEfUeDnNueGOrl5VL 3f+56qx45BEdnm5ZfJLPaU02OmWMVh33/AtxrQvSAAAAA X-Change-ID: 20250930-fix-amd-root-2a6529e8162a To: CC: , Mario Limonciello , Filip Barczyk , "Yazen Ghannam" X-Mailer: b4 0.15-dev-9b767 X-ClientProxiedBy: satlexmb07.amd.com (10.181.42.216) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00002324:EE_|CH1PPFC596BECF8:EE_ X-MS-Office365-Filtering-Correlation-Id: fffaf7e9-5fb5-4b72-354b-08de00410895 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|36860700013|82310400026; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Sep 2025 16:47:24.8743 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: fffaf7e9-5fb5-4b72-354b-08de00410895 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: SJ1PEPF00002324.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH1PPFC596BECF8 Hi all, Recently, there have been a couple of reports of the AMD64 EDAC module failing to load on v6.14+. This has been root caused to the recent AMD node rework. Specifically, the root device caching method breaks on non-reference boards. Patch 1 is a proposed fix. Patch 2 is a minor cleanup. Thanks, Yazen --- Yazen Ghannam (2): x86/amd_node: Fix AMD root device caching x86/amd_node: Use new root search helper arch/x86/include/asm/amd/node.h | 1 - arch/x86/kernel/amd_node.c | 107 ++++++++++++++-------------------------- 2 files changed, 37 insertions(+), 71 deletions(-) --- base-commit: 30d4efb2f5a515a60fe6b0ca85362cbebea21e2f change-id: 20250930-fix-amd-root-2a6529e8162a