From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from PH8PR06CU001.outbound.protection.outlook.com (mail-westus3azon11012033.outbound.protection.outlook.com [40.107.209.33]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8C3FE3BE17B for ; Tue, 19 May 2026 14:10:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.209.33 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779199820; cv=fail; b=UpRw4GIk7MUJSYIBFFm+RnIhHvB47UJxuaxLxdFcuHZ97c59CCFwIPYgfe7fK+Td3wjrsmBBi3v9Dhq8961DNsrQCi3lazyWJTjwPfrzl/pfSyThNxm/xBO9LgWhfZ1yC3zKPO1NF979/nVMxFpCdC+qy8jpyTD/Ky6/8vl4Iho= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779199820; c=relaxed/simple; bh=clIkXvlb+inYKfbbP49fk1QvMLop22p3CdhUAJLrzoo=; h=Date:From:To:Cc:Subject:Message-ID:References:Content-Type: Content-Disposition:In-Reply-To:MIME-Version; b=nPo5Riz+7kjijuvXDosj+Xkk3ehIVC3t14+3CGC4SuuIQ47q6hdSbiUpnjMCRdJex7Z5O4eHVQnZaCAlBe94BMIbRjE5RWdkyDsSX2iklZH8+Ki6UoWu4XQ9rRNKDxV7FkRsLHM30xLXk/5VdPZaEn6ZGYpv+pf+kemJNoLdpvQ= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b=AQJsIK0c; arc=fail smtp.client-ip=40.107.209.33 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="AQJsIK0c" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=btErGJ0F7paZRCGhfNQogohvV26GDw8F6BtYyC1yanoEkVQ/WqCs5VOwBvq5Iwnyy99FPO6kfJno8Ww05Up8tkcLc+SuItIRT63He08lPr5whbYPbLpWvYD65xjI4jpjr+gCn4orE/aZsYaMIK1xXqJ50mj8UbFKUUQETBMZnGXyZKDoeDLusRwVvWsTY1ButKmSDuAfWg1ekNoSFhjHzKqdjeQK46G6EsXytgLfOb/MUvICmAwUSm9IkByp/tvHK/25EZV6kziIsRJQNXYj6nWtyrgCGjoQoiKyaiZ9XipoKYLeOjH681F2Zt9/V/qF/jVhhAcsZOFgq2geb89dOA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=DSyxyiXr3NhxlqSMoUOj2rYZGQfdPYOffTIYUa+1i+Y=; b=VbVekySlgO5KaECW8pMQPGhtutQzg1XFB8AxcW+AbQIIdHn2ycjpHXzdhadXu1khaQKKoNH+xmPtC8+Uh12M9W2Cj7ukRzDgW27JveRePHMuiUTnO1Go8TpL1/C8iBqOeRqNH9AgH5QfzBn57tz+OiYTcmXCVvYWUGkD8pn8Ox+bd+V8S3wyY5OQRKfKKPkIUqDm17GHkT/eMU/WAh9hsuROT5d5hOl1yDMfPOLgikQUDKCyEH8NGCLNIRjRAkeLpUdLEzIGDwN8hSs/z50CEFIHN+no+o1UNTZMuWJPKvpism9aldoziAHH9QnLHMY9SdiX59Z7rk+bmEABufOciA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=amd.com; dmarc=pass action=none header.from=amd.com; dkim=pass header.d=amd.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=DSyxyiXr3NhxlqSMoUOj2rYZGQfdPYOffTIYUa+1i+Y=; b=AQJsIK0c0FcKNgQeMv3EiXMiol3200Mbq4tK+q4TvL7uN9Ypr+VkMA0vj3ZxulZzkXzS3qvhge5rHk2o81Hb7pt+L6eIuT+6aJbwd58NOxGqGIzF9LKmb5QJ9ZxcsKPHtM37XNMGGial6naISQifIYvow1coqRIgGa3WrlytH6w= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from DM4PR12MB6374.namprd12.prod.outlook.com (2603:10b6:8:a3::18) by PH8PR12MB7446.namprd12.prod.outlook.com (2603:10b6:510:216::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.48.14; Tue, 19 May 2026 14:10:15 +0000 Received: from DM4PR12MB6374.namprd12.prod.outlook.com ([fe80::af35:a7a6:6ca:7fcf]) by DM4PR12MB6374.namprd12.prod.outlook.com ([fe80::af35:a7a6:6ca:7fcf%5]) with mapi id 15.21.0025.023; Tue, 19 May 2026 14:10:15 +0000 Date: Tue, 19 May 2026 10:10:02 -0400 From: Yazen Ghannam To: Jiaqing Zhao Cc: Penny Zheng , x86@kernel.org, ray.huang@amd.com, Jason.Andryuk@amd.com, stefano.stabellini@amd.com, Mario Limonciello , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v1 0/2] x86/amd_node: harden amd_smn_init() against Xen dom0 topology Message-ID: <20260519141002.GA369920@yaz-khff2.amd.com> References: <20260506055528.476493-1-penny.zheng@amd.com> <3531c9e1-97a8-42ab-aae7-4cfa8976f443@amd.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3531c9e1-97a8-42ab-aae7-4cfa8976f443@amd.com> X-ClientProxiedBy: SA1P222CA0027.NAMP222.PROD.OUTLOOK.COM (2603:10b6:806:22c::11) To DM4PR12MB6374.namprd12.prod.outlook.com (2603:10b6:8:a3::18) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM4PR12MB6374:EE_|PH8PR12MB7446:EE_ X-MS-Office365-Filtering-Correlation-Id: 66ff1b07-77e1-469b-2fd3-08deb5b05974 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|366016|1800799024|11063799006|18002099003|22082099003|56012099003|4143699003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM4PR12MB6374.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(376014)(366016)(1800799024)(11063799006)(18002099003)(22082099003)(56012099003)(4143699003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?9EmZ8f/tDBfvXsRoD+tBkCACjoge4XjKHsBSI1sM1MptpH0y4Uv2Y5OAa/O/?= =?us-ascii?Q?fJYwM87jMuY2cxuUz7ShafQjSCGlxWBm2y6rmtOqldTZEUSiy+LhfftA6QHQ?= =?us-ascii?Q?1Ls4txfEfh7/M1m1x+mW5cWyzUYh3rZrcLXKS/dTEM/CVRrgGQ08hRab324p?= =?us-ascii?Q?HCeGXRRCddDuR2/A2TwmGJLIjvpmFLfATmiKgXt49G8TJ7p7dikrh4xjNEAL?= =?us-ascii?Q?YI13SlfnEappy+xtNIOeEJUnXtoSx63OZbJT4skW687vLbIpGOjFZPdwaRzE?= =?us-ascii?Q?kCg9Gd3W3TM/CgARHHSCqgz55vGuwrvItlHJsBSOVA2DzDyAp9nBIMOhjiG5?= =?us-ascii?Q?FTf2nJAmYjBfb3QyKkdNyiwAKYa7EIxi13XHb69J7lHPfrD5MpyeoC93whom?= =?us-ascii?Q?SIdQuHaPi36C49una70HfvYNaYhqaVNqbEfjBMT0FdvAF+qJDtzIs0YkriDz?= =?us-ascii?Q?udoOXnf/6/r7EusiSdWGoNWARvnTpil9dcydVzk1pzVj2zudj4KS/uG53PPl?= =?us-ascii?Q?sZofqe2Sn8d1EJNJpZ/vb1FodVplK+btrg+H7Iwi3QNAsyL1aHLMvsvMsnIb?= =?us-ascii?Q?0xpgnCt4Fa0aPUkK13YRkhP/fci8ZGG51HRRsk2Spftv6H2VIs3vf2Zlajbp?= =?us-ascii?Q?QoTOxSwWcdzPrekl6Qx4tzS+xg4JlhOlyr0OFcYufnLZ/KcNIhUmR9V8Ytwb?= =?us-ascii?Q?484EZLZrOfUHEtwYlyxW3sdIY+8+NN/3GC3fN90kiLD4iUi/M65CIxcdvm9S?= =?us-ascii?Q?gdohHD5hRuo6WZ7TiACf0zVcXXRwsApY2GKOcgq1CBQqHh45JIUDb2pXvcXz?= =?us-ascii?Q?NgYFk0+F1NfJtFGSr++SyGatnSfTZKrHzOk/xMYjnZzBWWj7d3ZgYMOWc+x3?= =?us-ascii?Q?6n4Uf0gSy5LsReaUviBKmihMlrRJAmiuFI2fFCZap7Yl9WDvah4gceE7WVOn?= =?us-ascii?Q?G1OxpDjC2XJ3VdC9d9UW66+jmJMdz2bFDx96S91OCCEpCutjy/n/q3nrYMk9?= =?us-ascii?Q?r0hUNmaoY8wipy4BbCL7apDwveuQm8K6xzXfj2m4yrAp73rONRjYAFqOIr94?= =?us-ascii?Q?tPrnJASrxeMRyAJ0wZt5alWIPhf+3EEwuSMYhmRDXHfWNEN8FAG1FPY5vX14?= =?us-ascii?Q?bthzZfVcAhbroDvYvCgGJvq6DzdZJvzutzG3z0ozp8MIrRUfIB9GX3XeVCwu?= =?us-ascii?Q?ZdeVwnPoh3ary69cDc4PZ4gi+IBLNNAeQzmq7WGwk1xQ/gZAbCmhN4jFedR2?= =?us-ascii?Q?8tYSyMB9TthTpt5ghHoK2xTzD7XFw2GbM08Cf31WGgz00VVghYB6H6OsGgTK?= =?us-ascii?Q?gaGBNpDtsFFMSd0pQ3u8PS6bYwu+LzZlHHVmNfJ1jhnp4GUC/0R7rWPlErus?= =?us-ascii?Q?jGziXTnz469jJKVL/PO+IBBQwxAu8e7IJhBltzwhKjAx6Nar3GAvc/sDJGGB?= =?us-ascii?Q?fxl8qDM1ry4DgkC7N/aKNJMQwV9+nh1ELSP+oklweBGzUBXTikHRVxuFonq0?= =?us-ascii?Q?/usFxBe15Y/O2xW2SFtOwYbzqQb7bg0TBYuiiLJ6qnBtkmfNBuIAj8s+aNNP?= =?us-ascii?Q?aGYqA7TfX2f2IqJwolGGLSgbnooKQqh4qAIAX4Ws1sGhqctbfSShzjSwew7F?= =?us-ascii?Q?XW8jnjBBrakdqap6Ys4vcv1Q37c/b3TmMoIrJ7vtgUcSK6RNDvsUFCDylOyB?= =?us-ascii?Q?u8LwzC/CT2lKY2gg6EIMdnTV3GIP+35AfUuwYL823A87J8e1?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 66ff1b07-77e1-469b-2fd3-08deb5b05974 X-MS-Exchange-CrossTenant-AuthSource: DM4PR12MB6374.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 May 2026 14:10:15.5539 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: QDzAkhWUBH/Ds7psDsGRkUji44rlSsEn246qWSm+JN4GsqZREab8BR0dtMP5iQYyG69BSgTcTJy041YxXblVpA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB7446 On Thu, May 07, 2026 at 04:37:43PM +0800, Jiaqing Zhao wrote: > This amd_smn_init div0 oops is also observed on 6.19.14+deb14 (Debian testing) > and 6.18.27. Given that 6.18 is LTS, suggesting `Cc: stable@vger.kernel.org` > to get it backported. > Hi Jiaqing, So is the issue observed with the latest mainline kernel? Or only with v6.19 and before? Thanks, Yazen