From nobody Thu Dec 18 03:19:09 2025 Received: from NAM11-CO1-obe.outbound.protection.outlook.com (mail-co1nam11on2057.outbound.protection.outlook.com [40.107.220.57]) (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 C854038DD1 for ; Thu, 6 Feb 2025 06:00:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.220.57 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821643; cv=fail; b=JZnaI4Xs2xfJS4SCatLgiSWQbpx4IFKTbyjc7QgUTcsfMZxiuVm6xvNkxR9sHhjt0IvZwZFg3QorEmCiddVSShP5oZrpJG66KFMHrC9QOA6i4Bx9fwcEOcKUgheZlJcd7saMbPEkWj0RbADbsoQ8Gbbk1xRRYzbOvYKKiS7c1D4= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821643; c=relaxed/simple; bh=KGmbP4LQcfd3n93DpkN166NaZkhJgh6bNr5xHhE7g8A=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=amh4PtnLw9XV1f7p4dSy9B7GKLpeP0mQJVQPE+aP9woOV3Az8ruLn54aHsWU4CC8eb06vb15YvR0Bxs5fJFpuuH0Dus7DP+DLyMM6TbywRO6QCOucGOj34BC9ryf//t6HlBe5CrKyEML0pPmTwuoClegHnoMLFT9VOAHFfux6U4= 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=1Q1W16/k; arc=fail smtp.client-ip=40.107.220.57 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="1Q1W16/k" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=DxENmA2auA1cZzCBHLeHP2EZ1AeEAqcWVy6PYWSplkqWcn40pLos3fxGdXl6Snjfr7uH04fsD1e706azL9iJWTq1cG9Cu0VPr1ZnBx9jZxNg2DMLeSeLbmnWfTISme5yzuJEb8MxeL0RVlX235pDTnwmkD3kjilAz7rvBQeGfJp4Rws5BJPpr2EMuzU5zYtdl6OqjeqvWtOGU5WiWTejh730mfeM1df32wuUPfgg5pde2kDY9VRglkntgCav5E0kPQnfjgk+zDmgy9PSRzd/hgiEr51TkDcytZ8v8TzeOEjQ2pKOzKd0u91sxS/kN8vz6tHy1tFLdo/Urti2GupXcQ== 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=SyLdTkBdlX4x/DALVmF5YkI0wAi3LbsIJcF15XqCTto=; b=HoqSOE+fkRLTUPbiXfCZmGemHf5X5wqr0A4iLlkGQExsmPdLEqZbbFzpPoEcUlEfs47TFV2uWB9YC9M68bQohqSRkyt2P2XH413qtjK1dw3leuZ+efP/vJpVuhplpVT7tnAJzHmXvUKOf+9CYu1wuuolztsy0q9XAArjK6OEn5TPE7vj+Jmfelw7WGOUsbppNkM/OzV1SfVDVc18DKDbgEIus1580Xyxp8rP5aEKP4DgtAWwCtJNB9wrwZVFvNWoleJtxEgvxUIBhw/cHf1N83Bu2XT2YZc4xI+6Rusx7h+m67hh2sNVaCZwrG+x/JBfSy1sLa+8dClEDI3ClFRklw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=8bytes.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) 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=SyLdTkBdlX4x/DALVmF5YkI0wAi3LbsIJcF15XqCTto=; b=1Q1W16/kwFCksbaXoarHRnZXSK3Q7bfG6nx6Fi9ptPF5um04xx/7vGQyP7svIthcUstWycpD4KEWmNzXjbGEgr1f/chwo3Yj/DGj4GX9pdqsROBBDGqhTzUaCmCtnm9s+M8b1S+MNFPalThMKLozbi369+ukcu1VcZyE4gq9GzI= Received: from BN9P222CA0013.NAMP222.PROD.OUTLOOK.COM (2603:10b6:408:10c::18) by CYYPR12MB8989.namprd12.prod.outlook.com (2603:10b6:930:c2::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8422.11; Thu, 6 Feb 2025 06:00:38 +0000 Received: from BN3PEPF0000B070.namprd21.prod.outlook.com (2603:10b6:408:10c:cafe::89) by BN9P222CA0013.outlook.office365.com (2603:10b6:408:10c::18) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8356.21 via Frontend Transport; Thu, 6 Feb 2025 06:00:38 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BN3PEPF0000B070.mail.protection.outlook.com (10.167.243.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8445.2 via Frontend Transport; Thu, 6 Feb 2025 06:00:37 +0000 Received: from BLRDHSRIVAS.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Thu, 6 Feb 2025 00:00:34 -0600 From: Dheeraj Kumar Srivastava To: , , , , , CC: Subject: [PATCH v3 1/8] iommu/amd: Refactor AMD IOMMU debugfs initial setup Date: Thu, 6 Feb 2025 11:29:56 +0530 Message-ID: <20250206060003.685-2-dheerajkumar.srivastava@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> References: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: BN3PEPF0000B070:EE_|CYYPR12MB8989:EE_ X-MS-Office365-Filtering-Correlation-Id: 82ec9b09-6521-4830-886a-08dd4673944f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|36860700013|1800799024|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?NNhDm/OgS2x6vQltmOtxAda+1Z6ZPmyq7U87epFIBCnyBRHLW04HdTfTdpuj?= =?us-ascii?Q?HSBCgU4s0eXK5W/zcVOSc+eKBYPoNt3SsY3VPaDW03p/9gnhED7evFpp1H3y?= =?us-ascii?Q?WaAIVa8f2asR61dBPLokLDKz6kURZHwh7YHcnNMlQpsnkpHppAgzpPJhxuat?= =?us-ascii?Q?e8HOnrk8d6SV9GhHXW4IlrI0fBAWTyN3frFfI9wM4mcezoEbzfbmIz0LO27N?= =?us-ascii?Q?o/P0xFb1+bo+2ykreNDr8/TK8Z7YAE7hZtNuptsM+8GjyHuVVfls1J2RR5Sp?= =?us-ascii?Q?M9s7/Z7lLNMl0rbY0FqMN0YYtzgz+4VI3fZ5jsQEojod6V9MYWtKfKk/VxwX?= =?us-ascii?Q?XVd665lqY0mHcTB9fo7yNd5he1fpjFA5JVrtM1RQiT6wo42J+pX2LrnLczBa?= =?us-ascii?Q?jZeojUIMoCqjMttbI+mcwxV/UZYL+S28HGaPt0yCpTsVOCYbpu8oMDBWkd7n?= =?us-ascii?Q?K/46weZRV52VJo6M+oqwNJ6c6e63gnjN7UUvgo/Eps6uGv6FWZ9TEPQ3b5QA?= =?us-ascii?Q?y3dE9AgOS/br5wu2iI8ZTSz4/4LlxdVOuArZqRBXPVrU4/MxOAWei45CiLLB?= =?us-ascii?Q?uP1MRz7wBL6z9yXl8o2cTxn0ojiqo/fHQo4UxliU1Liygncwr4Ktis7UZhuU?= =?us-ascii?Q?F2zxQRi0a3S2m7b7X5p6Uh3sBxT7bJT9CFZUkPIvI9sx66/fBzOYTWrhu2jH?= =?us-ascii?Q?LzaTzbqPG7f6o4wlaqXWAnuJC+k0mjpUhfp6dOwTTSStSsIbO85CUPFL1ukF?= =?us-ascii?Q?G17IwMm6X/NRmKM78N5UEwj2OySqRLBmEnRKAEsEPkZsNtUTtAtv0bcklEuD?= =?us-ascii?Q?uqJEgVM+3Y5oV4DbYvLTIS621+ZqmFQFCQJzV3hUf0EKHyKQ04bSDykgkUL+?= =?us-ascii?Q?0EKbRLPQRy70F5xG5c3eakVWA6zokBC5v/PiuwdWEYjCEOLu3qKmtKI+QxXR?= =?us-ascii?Q?5S6H9FLDyqb+UeMf/fH+YseLKldXUn+q4rgWLdcoR1qwm1Lh0ngkgvJs4ele?= =?us-ascii?Q?ntyj6W982y4+i/GnYGu1xN7v7Xfcu1vd/aWImzO8NzxJpw5gqx9cRGleJm2G?= =?us-ascii?Q?N1GK3iZQtk6A7SjsI26G2PI3UI4cig8SL70/97BVYCvDfwdT/ef1sz/tCUmr?= =?us-ascii?Q?fcnDtSc2ZqUaNnRVgJtH5UpK/fTRdC4xRSsufsZkrCybTBGrMBt4ENPz9dzH?= =?us-ascii?Q?y0vZCfThoP41lOLXwqnbgBPMroO8NancCkswjk8LBSHilxFPI9Xxiv7fzqg3?= =?us-ascii?Q?SeebOc3mgM0njjDrDttqd0q8wYopjTqFHtblqduFs/XVoVQfgkik/uDeUlqh?= =?us-ascii?Q?sb5NBEQJTxfEAk6pemcscldmTf7AsTCkIWiOz2AtUbMjkBwgPFi3yAHSj/nz?= =?us-ascii?Q?FY/if8czn/i0H7Yj+cxWMFcp5BwHP92kxcAsRFZ2slmKTMQfj5dj50FNKA33?= =?us-ascii?Q?KsTrYzUbKuUf1RqT16FIEnRQkRMGegtq1XaTnpIRQaFeU8IUDaK2TF4fobWW?= =?us-ascii?Q?BlrVQGRGHwjRpoM=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)(376014)(36860700013)(1800799024)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Feb 2025 06:00:37.9277 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 82ec9b09-6521-4830-886a-08dd4673944f 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: BN3PEPF0000B070.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CYYPR12MB8989 Content-Type: text/plain; charset="utf-8" Rearrange initial setup of AMD IOMMU debugfs to segregate per IOMMU setup and setup which is common for all IOMMUs. This ensures that common debugfs paths (introduced in subsequent patches) are created only once instead of being created for each IOMMU. With the change, there is no need to use lock as amd_iommu_debugfs_setup() will be called only once during AMD IOMMU initialization. So remove lock acquisition in amd_iommu_debugfs_setup(). Signed-off-by: Dheeraj Kumar Srivastava Reviewed-by: Suravee Suthikulpanit Reviewed-by: Vasant Hegde --- drivers/iommu/amd/amd_iommu.h | 4 ++-- drivers/iommu/amd/debugfs.c | 16 +++++++--------- drivers/iommu/amd/init.c | 5 ++--- 3 files changed, 11 insertions(+), 14 deletions(-) diff --git a/drivers/iommu/amd/amd_iommu.h b/drivers/iommu/amd/amd_iommu.h index 68debf5ee2d7..58308ed12d83 100644 --- a/drivers/iommu/amd/amd_iommu.h +++ b/drivers/iommu/amd/amd_iommu.h @@ -28,9 +28,9 @@ void *__init iommu_alloc_4k_pages(struct amd_iommu *iommu, gfp_t gfp, size_t size); =20 #ifdef CONFIG_AMD_IOMMU_DEBUGFS -void amd_iommu_debugfs_setup(struct amd_iommu *iommu); +void amd_iommu_debugfs_setup(void); #else -static inline void amd_iommu_debugfs_setup(struct amd_iommu *iommu) {} +static inline void amd_iommu_debugfs_setup(void) {} #endif =20 /* Needed for interrupt remapping */ diff --git a/drivers/iommu/amd/debugfs.c b/drivers/iommu/amd/debugfs.c index 545372fcc72f..ff9520e002be 100644 --- a/drivers/iommu/amd/debugfs.c +++ b/drivers/iommu/amd/debugfs.c @@ -13,20 +13,18 @@ #include "amd_iommu.h" =20 static struct dentry *amd_iommu_debugfs; -static DEFINE_MUTEX(amd_iommu_debugfs_lock); =20 #define MAX_NAME_LEN 20 =20 -void amd_iommu_debugfs_setup(struct amd_iommu *iommu) +void amd_iommu_debugfs_setup(void) { + struct amd_iommu *iommu; char name[MAX_NAME_LEN + 1]; =20 - mutex_lock(&amd_iommu_debugfs_lock); - if (!amd_iommu_debugfs) - amd_iommu_debugfs =3D debugfs_create_dir("amd", - iommu_debugfs_dir); - mutex_unlock(&amd_iommu_debugfs_lock); + amd_iommu_debugfs =3D debugfs_create_dir("amd", iommu_debugfs_dir); =20 - snprintf(name, MAX_NAME_LEN, "iommu%02d", iommu->index); - iommu->debugfs =3D debugfs_create_dir(name, amd_iommu_debugfs); + for_each_iommu(iommu) { + snprintf(name, MAX_NAME_LEN, "iommu%02d", iommu->index); + iommu->debugfs =3D debugfs_create_dir(name, amd_iommu_debugfs); + } } diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index c5cd92edada0..1f0d422bfcbf 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -3375,7 +3375,6 @@ int amd_iommu_enable_faulting(unsigned int cpu) */ static int __init amd_iommu_init(void) { - struct amd_iommu *iommu; int ret; =20 ret =3D iommu_go_to_state(IOMMU_INITIALIZED); @@ -3389,8 +3388,8 @@ static int __init amd_iommu_init(void) } #endif =20 - for_each_iommu(iommu) - amd_iommu_debugfs_setup(iommu); + if (!ret) + amd_iommu_debugfs_setup(); =20 return ret; } --=20 2.25.1 From nobody Thu Dec 18 03:19:10 2025 Received: from NAM02-DM3-obe.outbound.protection.outlook.com (mail-dm3nam02on2052.outbound.protection.outlook.com [40.107.95.52]) (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 C05D2157A46 for ; Thu, 6 Feb 2025 06:01:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.95.52 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821664; cv=fail; b=X9tdXWzqQtg+5/tOPoIGM1C+5Df+gVV2j1AI3hOyo9CXIqREvvqqJcj/fc5XmBQe/+kdNwHbven7DeGRkCUES8cjqv19rUWnIekHKdx4qJAZMmHyi0k5UBQOBGnEqJ4K673THm7C0ZfK+4AuZD8UwT9LaHrcQ4I+P2Kd/+/VPdQ= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821664; c=relaxed/simple; bh=8/glszcPjOcy+WH1zy/akcCSd+ZJkabZwr18zBpbpDw=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=RRSF8Z3clnQFqQBKSo/giv+NXFjZME1Q65I6J62fr9hFbnKrUl31w5ovtXQYgoWgLwnRmmL92DkjDD3jukxAK+yA+dZPAn/X87P6cWU6It9PifoLWHu57L7EORgVQE/9HrUWaGXhRQ1NP6Pi1CfbOcB71uHrHIrtFnvoM7tMxKY= 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=WWs0egJi; arc=fail smtp.client-ip=40.107.95.52 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="WWs0egJi" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=SvKvqfJJ/yXmU8jKyhp2EdMrhmwqtB2dZkH0kSqb7tTPfC+am8DbpJwEDqLr8nYy967AR2hlzwDYYSpJJImtLd+H/1quYKk1etFrGE8LeHDcBUvzqOIUpRLHOk/YZ2LtFUdPFwk8XL45Eeh+djohtHqKXZRzh1GqjctaN2LoJ95aQ7sJ402ghARbSNmMlCnHo7Ezb62+ut9O5Z3gmqihbvnc42e6hq4cfZMFDQnw25E1EmI/eA/8bjzq+C3ik1zj3FZ09ffcOn+MQgruRiMcvQGEwMc2j8dcSMJwu0ne5CUWftU+b/3egRImfCWJf3d+IaSe/WGdU2vs1HW8/apjbw== 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=cO6W6T8LWDduFbQ0WvR0AQA2FvQC4L75PfwUO6j3FTA=; b=Dkglq+KGWYRNQfvg7cz69B8yBQIFUjRqE804ifO7KqU8m1dIIQkDH6/bmFrqjGLkaDUXVFtMpwPalnasTzrR/+CiTKwTOGduj+AAsZlN16Lqy1ItmPA+JXyINhiiFOAf9eDVGoNkHCcPfXmzKOlW9wDedagDdGnypCPfX3yn7IJv4XYhqJ6MpkkB6fgdYuo4Eedp8awFOo6oOFR1BtMpcxWfibwkmBNwEvL5wT/heF1VvoGG8BjriEHHzUxsTIT+FgJfzABf05pfNWV2o2tiNHrGaBPGnb4EGtNbrFcqMTA/zuPfqREoOcj9uS3HLF/gyOP1zC1PYEiVCR043CEY3A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=8bytes.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) 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=cO6W6T8LWDduFbQ0WvR0AQA2FvQC4L75PfwUO6j3FTA=; b=WWs0egJiLvNGxP+iFKH/vAUoyAlG9psQeYHgA7XfKeyzQA+NSI0i38IWMicd/DU2i1vAlBwKV/jkmVap6a1j6tf2EqK7Yhsa2XSr2dOF+uj6k5B4t+ybX1YtEBBgwISz/le/zkM5gBP/qXRYCCDjXT4yIYbxleBPFZdYgFG0XOs= Received: from BN1PR12CA0025.namprd12.prod.outlook.com (2603:10b6:408:e1::30) by MW6PR12MB8898.namprd12.prod.outlook.com (2603:10b6:303:246::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8422.10; Thu, 6 Feb 2025 06:01:00 +0000 Received: from BN1PEPF00006001.namprd05.prod.outlook.com (2603:10b6:408:e1:cafe::be) by BN1PR12CA0025.outlook.office365.com (2603:10b6:408:e1::30) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8398.20 via Frontend Transport; Thu, 6 Feb 2025 06:00:59 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BN1PEPF00006001.mail.protection.outlook.com (10.167.243.233) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8398.14 via Frontend Transport; Thu, 6 Feb 2025 06:00:59 +0000 Received: from BLRDHSRIVAS.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Thu, 6 Feb 2025 00:00:55 -0600 From: Dheeraj Kumar Srivastava To: , , , , , CC: Subject: [PATCH v3 2/8] iommu/amd: Add debugfs support to dump IOMMU MMIO registers Date: Thu, 6 Feb 2025 11:29:57 +0530 Message-ID: <20250206060003.685-3-dheerajkumar.srivastava@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> References: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: BN1PEPF00006001:EE_|MW6PR12MB8898:EE_ X-MS-Office365-Filtering-Correlation-Id: f207bcb4-2e20-4045-625a-08dd4673a142 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|1800799024|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?L/2l15Sn0WjfTcFsGhVdzacUsolKYiSSZEo6BrCCv/XPVGbod+BjSWTtq1ik?= =?us-ascii?Q?luwCR6Y7/d9ZOHy8XisWTZiFAjBKIia1F7mD9X2+bt1yUjbyq391AYiXFvw5?= =?us-ascii?Q?1UmDtXwX3a02oRUouSChK5YqiXlaA//Y70rcjBRsWMc21s9ZqLDH0pz1iKOl?= =?us-ascii?Q?/fXxYq7Yp+JRc9qkJJWTKXh4fipfUS32cu33Vm2BvIi+a9bIkhZy052pigxO?= =?us-ascii?Q?lQ6Wd8UQVj0zgAc79GIDE+3D59/YRB31SDTQqhW+yU18rPomEKP6h0iF6nQt?= =?us-ascii?Q?WfSVP/bTacVSazLoPtchVCWk5EyNE83OvS9dkr/Cw3Yhfjm3aNHCnneSaJN2?= =?us-ascii?Q?Sz+gT3dUIXX/chjFzVU8kdRarPolSvG0VdQJuxflhMPZjSs97vjA4CtDKT1i?= =?us-ascii?Q?T/KIjy18dKiMbLTQFzK6ToA6jfovmSzSHhrgts7tPR88g+WUP+qfhjcIMH27?= =?us-ascii?Q?6bp6Ga9/86HTvEwjfn9p1eGN70UBHX7RFDziK/7EpOtwsQzk/8Li59qthGDY?= =?us-ascii?Q?HVzXSUC16RDVllOZK0IfzGRcLenfLlhWPGvF//Vs2LetqI58VDwf1EdweJCp?= =?us-ascii?Q?kfpHIwhmPCM9XUTWwRIm5T+qGKo/Y1O+9+MkjEdVg/skk8HQt35QTRV4cv8g?= =?us-ascii?Q?LeGbSKvuNX3uR5WFoVTa4sQs2NLMsQYjr5oysXGL8bheq/AyMrJ/3w8Kl9SV?= =?us-ascii?Q?U95BbAU4VJ0nSrUUXhs/YYAgB7NKsthnQcPGlkMR6cCFPBMtuSx9oSnTmC0J?= =?us-ascii?Q?XvnCew/H7MN4nddVXPuzRDf+hULW+YVwTVxWdO9I2tVqWQgaXon0cYnNyuAd?= =?us-ascii?Q?T4wWIVoP97H9tnOBgR4SeBWFN9LKHAWwJGzpHCN9Yvi+SGIOVKq0eXd/BRrE?= =?us-ascii?Q?ghU4vxJvQsZy+kBiJdlnaaEmO0PF54NF91v9kf6on/m8QBw7c1lBzWJOZv6c?= =?us-ascii?Q?fVUIShphwcXfYbHueD16lIRFgpUTrqq31jfEhquKJUZ1cZvQPHzv08HSMoTJ?= =?us-ascii?Q?pK+QZQlReQt6amsEGoMP2D+FImitMW+oc/vM3Q9+JQ/n83mIjfw10UdSx7n+?= =?us-ascii?Q?CgRt2fNAvY0av+a8z9EU+Bx1uGDNZKKVZb9zhhgmnnkquJpuXlAwvlAWr29n?= =?us-ascii?Q?EHoiB8uSyTkc8yvC712W174pSkOQJNdBsKUaruqR2AyB1MxNqJrVy0f6nuvs?= =?us-ascii?Q?HNGaTJ9HaMVzp5gjHgEVHwxWqYm3+b/GUp2OQPJJ5MCSu3ltCDF+Do5IzaMU?= =?us-ascii?Q?r5CsPio+ED4gszHgz1xk6b9oRGZ0o+mKh/NMUyc+dM955Vd1DR+de+uNXlma?= =?us-ascii?Q?7X4vGkiX9qKPErW+7v+zYCpULBEVu4LPQoLeB0bgVZ4qiMr47qItV0PsQ5wG?= =?us-ascii?Q?6CHQOmZjM4DjWkcY3bL2JveALrBJRcbAM61LJcOkw2k5hQW6ulL5qrMlRoZ4?= =?us-ascii?Q?ef/ePof/M7N3HQX9jkCkV2QBmWYp8YcpmJC5QBGvkqD6UaQimGJ81lRqotnx?= =?us-ascii?Q?40V7pyGanUp6L/A=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)(36860700013)(82310400026)(1800799024)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Feb 2025 06:00:59.6519 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f207bcb4-2e20-4045-625a-08dd4673a142 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: BN1PEPF00006001.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW6PR12MB8898 Content-Type: text/plain; charset="utf-8" Analyzing IOMMU MMIO registers gives a view of what IOMMU is configured with on the system and is helpful to debug issues with IOMMU. eg. 1. To get mmio registers value for iommu # echo "0x18" > /sys/kernel/debug/iommu/amd/iommu00/mmio # cat /sys/kernel/debug/iommu/amd/iommu00/mmio Signed-off-by: Dheeraj Kumar Srivastava --- drivers/iommu/amd/debugfs.c | 45 +++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/drivers/iommu/amd/debugfs.c b/drivers/iommu/amd/debugfs.c index ff9520e002be..b16b62ae7111 100644 --- a/drivers/iommu/amd/debugfs.c +++ b/drivers/iommu/amd/debugfs.c @@ -15,6 +15,48 @@ static struct dentry *amd_iommu_debugfs; =20 #define MAX_NAME_LEN 20 +#define OFS_IN_SZ 8 + +static int mmio_offset =3D -1; + +static ssize_t iommu_mmio_write(struct file *filp, const char __user *ubuf, + size_t cnt, loff_t *ppos) +{ + struct seq_file *m =3D filp->private_data; + struct amd_iommu *iommu =3D m->private; + int ret; + + if (cnt > OFS_IN_SZ) + return -EINVAL; + + ret =3D kstrtou32_from_user(ubuf, cnt, 0, &mmio_offset); + if (ret) + return ret; + + if (mmio_offset > iommu->mmio_phys_end - 4) { + mmio_offset =3D -1; + return -EINVAL; + } + + return cnt; +} + +static int iommu_mmio_show(struct seq_file *m, void *unused) +{ + struct amd_iommu *iommu =3D m->private; + u32 value; + + if (mmio_offset < 0) { + seq_puts(m, "Please provide mmio register's offset\n"); + return 0; + } + + value =3D readl(iommu->mmio_base + mmio_offset); + seq_printf(m, "Offset:0x%x Value:0x%08x\n", mmio_offset, value); + + return 0; +} +DEFINE_SHOW_STORE_ATTRIBUTE(iommu_mmio); =20 void amd_iommu_debugfs_setup(void) { @@ -26,5 +68,8 @@ void amd_iommu_debugfs_setup(void) for_each_iommu(iommu) { snprintf(name, MAX_NAME_LEN, "iommu%02d", iommu->index); iommu->debugfs =3D debugfs_create_dir(name, amd_iommu_debugfs); + + debugfs_create_file("mmio", 0644, iommu->debugfs, iommu, + &iommu_mmio_fops); } } --=20 2.25.1 From nobody Thu Dec 18 03:19:10 2025 Received: from NAM12-DM6-obe.outbound.protection.outlook.com (mail-dm6nam12on2063.outbound.protection.outlook.com [40.107.243.63]) (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 1A7722E64A for ; Thu, 6 Feb 2025 06:01:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.243.63 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821684; cv=fail; b=p1RjoM3QTq49E5xpo2Dpc3zsTq/3qP16K8EiGJsUD9GDviyNa4mqozYFTowxnuDtdR7bvOZhF7heixLHuo4m272LP58uLGWNGsD4Pmvj84fsq5JW+zBoaQqVQPXDUzt/KoF7dpfOovXXGtrFU8DVgLpNJctCpxr/twQAMNpOjA8= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821684; c=relaxed/simple; bh=IJeB+MHVIg1RCzBU3Lioe8P5Vi+rtII6wD8fzUNCS/U=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=eGqEdyCnHQZ+yrpBh5BszZ4VpbFV64sRUsBY0P8Lh8DOSrgO0THsNHR66gHyvujrCCNTxfC/utUgsnN/vsHczTrub43VBhagoIdYlOtHtv2xqmy9EPjkA26DV7dHBhWhk08JRxjE7CTpBLkrEvnqJYJ3BaSXYpYF4EDWd+oyKoA= 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=BKhHQZ8n; arc=fail smtp.client-ip=40.107.243.63 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="BKhHQZ8n" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=WFGRs8g6KQnp5FlnM38/DD86r0agPaNH5xJIM6Uiyn6C1nXh2Tw+K+8VYfV+ZJJlVLpMMVujL+5/PnEli9BVebrX5lCHxvXFJSopRb7Ibsmm9xoe00NKlL5QSqbRm9+i0xDos8Z8+qgsVyfYfO9nHJyyTFVs/4e+u9+q7tsUGASSiwJBlIaVg9JCHcjLJWVhR+Um4DNu4kj/XVL24+HkfJceTyUOOr61x+pfTm+nU+37AnjrqAAIGtXAJ9u/bTlW/AM+MItZ9w0l+DHe0JBJEqjS7WcGHEcgtZcMRq3C7IhG7EfsEl97U65HEfIuaDAG2zHd4NOx5rCqiQ7MFzjV7w== 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=6sFQ8nOGTmGxcD/2va9u1RB62nTxwmpydRbN2CNHWWc=; b=aXAR42NvzjsOcLMHjr7rY6PjLReOcCdZG564BakAo+OH6CEoTwv5F6dY7aPv3P8+pn90eQOv619enXHn1uLCNqr2j2pCqXIXDufeDYkg+Jam4SWsbLCnvX4Gi9BbOfK9wT9n3CfNnyq3NzkVMQU3Zt8ZDEYIIYE8h+p2mqb34O9qmSnxUVcYAl/Ii+M+HqVzHeHehNhju5/emJ3T+R/7NbJDbPZNxxWfK0/Bay44gD0ltd+OEThRGT4KXgSi40ivr8bc5CQTZ7LeFVh3WehN8XQdszrB3GUGKPPKjoXkagOg7dP0C8MfEewK0GqMV5NF8gTGTrmxfXRXJjWtGB53lA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=8bytes.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) 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=6sFQ8nOGTmGxcD/2va9u1RB62nTxwmpydRbN2CNHWWc=; b=BKhHQZ8nAjyqWx+nF99FpvsKW3Ym8B/QWIEiBpM14G4NfF6XLF8fIm4JdIMrHlHwRuvdDn20E/4FfKpK0O1b0YM9ynmKQR87aP8SNfxBQL0sud6o7anGKzc37f69aROJUiawx2HpIUf0A3exOtZoY783CDKzWGurB4xR25OTcXY= Received: from BN0PR08CA0026.namprd08.prod.outlook.com (2603:10b6:408:142::28) by SJ1PR12MB6195.namprd12.prod.outlook.com (2603:10b6:a03:457::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8422.11; Thu, 6 Feb 2025 06:01:20 +0000 Received: from BN1PEPF00006002.namprd05.prod.outlook.com (2603:10b6:408:142:cafe::68) by BN0PR08CA0026.outlook.office365.com (2603:10b6:408:142::28) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8398.28 via Frontend Transport; Thu, 6 Feb 2025 06:01:20 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BN1PEPF00006002.mail.protection.outlook.com (10.167.243.234) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8398.14 via Frontend Transport; Thu, 6 Feb 2025 06:01:19 +0000 Received: from BLRDHSRIVAS.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Thu, 6 Feb 2025 00:01:16 -0600 From: Dheeraj Kumar Srivastava To: , , , , , CC: Subject: [PATCH v3 3/8] iommu/amd: Add debugfs support to dump IOMMU Capability registers Date: Thu, 6 Feb 2025 11:29:58 +0530 Message-ID: <20250206060003.685-4-dheerajkumar.srivastava@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> References: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: BN1PEPF00006002:EE_|SJ1PR12MB6195:EE_ X-MS-Office365-Filtering-Correlation-Id: 6fca9a83-2599-4c13-c6fd-08dd4673ad5d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700013|1800799024|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?e25aobFzmLdMIjzh/6locTMjFlntDtn4dScIDHm+rLp9vo3shRBIyAyw6CsN?= =?us-ascii?Q?w9/jNjp37rIY7/VgdYinvk9FUS3/B+2K/uMNJcSYCAF/JXi4EIl6TS6YUJKt?= =?us-ascii?Q?t+RKjgjQEYW8J1mUeveq0jhhcdswyl0oXEtIy2qdsdKHujv2YulFGrT2G+77?= =?us-ascii?Q?ISnTuNgjdoCRGckOaQLMH74Ya9dPwKj6sZ3LaMg82azUvSmI4Gl678KoPnoe?= =?us-ascii?Q?6b8wzxKkefCqhuO/ne8FG/59+MkKWYCE3rgmzUTuWNq1Hp7YTFXIIDY19ysH?= =?us-ascii?Q?oxCzcj2Y0yjWM76bQPpTs5Y+tQC0VXu1eGnV5QhZOPMTgaQWxsaWAzPMLktu?= =?us-ascii?Q?GN8fzKmajEuTz+rpjDUolu50irSiapXF2etz8REfl2VlCaCVHL0gPbliL5kC?= =?us-ascii?Q?I577azh/AIvNJVBOwkvCDycTa7B47eYb2lotqLCpXFnR3kf5y6wISTYX9kee?= =?us-ascii?Q?HsIMtWFAoMo7mqfnGfl2kv4A6qQlGnSAf13SN7dpmrL/8Ke/JpnARhf76EUH?= =?us-ascii?Q?mr8+J2McLlZm6Oy1LnRu1zUWCGII1xSigy/zKC6/ZRWivyXwiMSoQHV2WGY4?= =?us-ascii?Q?bjydKiPNGesQEmFBQKzUhAEbMbxse+aa66AqBTdMcmmSDqhs+ZWz0lBqsiZi?= =?us-ascii?Q?K0GhoTrtVOwFf8dynWy6M/NoTxIhIrcYbqnlzC/G9OzNhPv+FjgiMdpKHy1f?= =?us-ascii?Q?fk5okRLJzRctfaTNYP7E0nNqNvWw2GLiFZ9sTDdmMH5d+/mAe9aZEij67knA?= =?us-ascii?Q?C5WyHWcu0qGdGId3P/oSIVtg6dpGHJIcl3xKw4/Zl2iWMndcrx2ml0QpRbJP?= =?us-ascii?Q?UpkPFH8LCRcfKwMrTkPjrvhXxAhGpygAC7Q5ny6JxJ22ZLjZN1VMAWFsyCcB?= =?us-ascii?Q?JUou1C2N1AT2XOZlXvK9k2emqqcjmp+ScRsplx3NRgMUMim6bnDy4H+h21Fi?= =?us-ascii?Q?bsnoOLGzyoNNCq0vehpZyaPQbQ+hbZmutEhYc46AdFhAERVuZPNzAOJycNcB?= =?us-ascii?Q?Xsh0NIA2sIhA6vtEk+69SnCKkH6GY7wUzugr46YAJbM/0Ii0C666g/PajqH4?= =?us-ascii?Q?FGbStPdIXn21y+RxccxtbhPRQDhZMaKpgQrxlhonamg7xCxmD9JsOtxLpiPD?= =?us-ascii?Q?My2TVcMpmBX47PQz/63dq82X9HqiOj0aZr7pmtlpBrv4o1sD4Lv70ATkzxyU?= =?us-ascii?Q?F40vitTo0KS3L98Wnx24I5Tpi4aJIF1PPeAIPz/4AxHwPHPQdg4Ftg9L3mVl?= =?us-ascii?Q?CPNZfJ1n/6TDY/vJBfYKapnXLJBBbjCrzXBuLNCLbfabJQAAgsENa9d5aODo?= =?us-ascii?Q?UR4vfoWq/fDf0M8cXf3YTyr3SxlqKpfyV8zuJiglXa325mAj2KCET0hSN/rQ?= =?us-ascii?Q?J7SXAl74+tQ5YVTs+S/MO99d8cR4inqAKtz6OkzMAxd3luy/dnvz0hhFWWh0?= =?us-ascii?Q?PATazAd9sufxKecoxHCQtLt4jIF8T5N/nRy3UePKfxh7DqCAwSSkL3cxnqM5?= =?us-ascii?Q?28ulqAK5UrqKFvg=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)(36860700013)(1800799024)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Feb 2025 06:01:19.9640 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6fca9a83-2599-4c13-c6fd-08dd4673ad5d 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: BN1PEPF00006002.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ1PR12MB6195 Content-Type: text/plain; charset="utf-8" IOMMU Capability registers defines capabilities of IOMMU and information needed for initialising MMIO registers and device table. This is useful to dump these registers for debugging IOMMU related issues. e.g.To get capability registers value for iommu # echo "0x10" > /sys/kernel/debug/iommu/amd/iommu00/capability # cat /sys/kernel/debug/iommu/amd/iommu00/capability Signed-off-by: Dheeraj Kumar Srivastava --- drivers/iommu/amd/debugfs.c | 47 +++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/drivers/iommu/amd/debugfs.c b/drivers/iommu/amd/debugfs.c index b16b62ae7111..dc5fdc905754 100644 --- a/drivers/iommu/amd/debugfs.c +++ b/drivers/iommu/amd/debugfs.c @@ -18,6 +18,7 @@ static struct dentry *amd_iommu_debugfs; #define OFS_IN_SZ 8 =20 static int mmio_offset =3D -1; +static int cap_offset =3D -1; =20 static ssize_t iommu_mmio_write(struct file *filp, const char __user *ubuf, size_t cnt, loff_t *ppos) @@ -58,6 +59,50 @@ static int iommu_mmio_show(struct seq_file *m, void *unu= sed) } DEFINE_SHOW_STORE_ATTRIBUTE(iommu_mmio); =20 +static ssize_t iommu_capability_write(struct file *filp, const char __user= *ubuf, + size_t cnt, loff_t *ppos) +{ + int ret; + + if (cnt > OFS_IN_SZ) + return -EINVAL; + + ret =3D kstrtou32_from_user(ubuf, cnt, 0, &cap_offset); + if (ret) + return ret; + + /* Capability register at offset 0x14 is the last IOMMU capability regist= er. */ + if (cap_offset > 0x14) { + cap_offset =3D -1; + return -EINVAL; + } + + return cnt; +} + +static int iommu_capability_show(struct seq_file *m, void *unused) +{ + struct amd_iommu *iommu =3D m->private; + u32 value; + int err; + + if (cap_offset < 0) { + seq_puts(m, "Please provide capability register's offset\n"); + return 0; + } + + err =3D pci_read_config_dword(iommu->dev, iommu->cap_ptr + cap_offset, &v= alue); + if (err) { + seq_printf(m, "Not able to read capability register at 0x%x\n", cap_offs= et); + return 0; + } + + seq_printf(m, "Offset:0x%x Value:0x%08x\n", cap_offset, value); + + return 0; +} +DEFINE_SHOW_STORE_ATTRIBUTE(iommu_capability); + void amd_iommu_debugfs_setup(void) { struct amd_iommu *iommu; @@ -71,5 +116,7 @@ void amd_iommu_debugfs_setup(void) =20 debugfs_create_file("mmio", 0644, iommu->debugfs, iommu, &iommu_mmio_fops); + debugfs_create_file("capability", 0644, iommu->debugfs, iommu, + &iommu_capability_fops); } } --=20 2.25.1 From nobody Thu Dec 18 03:19:10 2025 Received: from NAM02-SN1-obe.outbound.protection.outlook.com (mail-sn1nam02on2086.outbound.protection.outlook.com [40.107.96.86]) (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 91E8538DD1 for ; Thu, 6 Feb 2025 06:01:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.96.86 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821705; cv=fail; b=jsUA3hXOnKWzTJRC69oKziv9rzFn0dQqVJ1JsuBeA7GrflIOurECX4M06FOUzn8hJ1ExGmqFJMLebIsrkAkZ/Vbt0S+cXY0iKK03DOse7c6flxHnsNWl3ocNI50iGMBvDsgGRS9lIAT8M5ORRLxPR++6d3ecOy2+z5SZejqapSQ= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821705; c=relaxed/simple; bh=+2Oj2WljxARDcqaHJDTFo8k8KG2o7dWwnGu+UHLRFds=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=KUZBPR3McwBr1GCXegOT4AMEJ5k+Xhjf58zWV+weC5GH+lUKGOGeqyqgd45CEcXHiRmIlTur6khL5DJHDC7KmLBSr6ua4TjcER852ALo2ipOdVjH0fb/BuzFQY8UdzNh+FVWQfkb7e+wA/yKS+OEyzhaHiJOzmq+v3Iz7WlFElI= 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=SOecljlX; arc=fail smtp.client-ip=40.107.96.86 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="SOecljlX" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=VTGzFUeNPWItCiLZtgIHnkMfrOeM0ssft94oEnYNv+Da/j2qGgujcr1s8t4uPjQnJos4YSwLwC3kHV3NGWOTPu+SpZVWPSufaGEQB/HH505vFLPImdEYyjcgvPjnHoIz7RQXrvnM6w3PujxIFY90xPBsZNUAg8MKl1+XB3em+qU/zFr+ToAllTHNGOOxL7AijisPdqMfo6OpgRgEd1LpDzSeTAYKRclHrexdwPhwpnONOEs6/rzgD9QbC8L96Yl2+XfmiZ6qBJLe653sVfZ/0QH7pw2Us03ozIXkSkJHAE6vtXoCUQhu/rvz+lgDNeqeklr4VG+bRqQvYuhJXX246Q== 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=lE21/pFsffd/cBb9sIsdD8AMiQRvePlEj6ZfYzaiBp4=; b=Kh4MvlKzpMxZYt8daqOnmNH2EpCelv48iwwiuyR1/uTTma7Lg/vFA8R7jUK2+lK5NUww8gu+Sp49Za2jGUvpBVocmmX9GZrRpxYP/KTIQChAN3lUgQq8c85Np38DvhloJNjycgZuZszrHZilvMo29v2nBRXimjUs492JfAKrSAxiXO8uTZo5y0VZGRpvWDqf+6dJpenzEUjAmAF4iuR6+mAUey12tiQq5ZVePMEkGeyaGGJfH+bQh000MxJOz+WK9/fb7MWNZ9K4QQhEH3/T0Zbprmo+Xf0LmfPf+u5qKGWdX5AhfJAS19QxALUmPsOTIIF5n87frJxBtgHrPXgUag== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=8bytes.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) 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=lE21/pFsffd/cBb9sIsdD8AMiQRvePlEj6ZfYzaiBp4=; b=SOecljlXb2u9xBHwq0VsMes7mTVE1qLwOak3or0AMLPWAzvbK2n/b+9KXYtzp2TmP0R+v3Bl0/6Ikm33qH9dK/moNWSoNvaT843dXBxl7340aef82efrWDn5phe+fEO56FLsFMGrOZLTRhtRrgqwnvr02meqaU4aAheJnyexfR4= Received: from BN1PR12CA0002.namprd12.prod.outlook.com (2603:10b6:408:e1::7) by SJ2PR12MB7846.namprd12.prod.outlook.com (2603:10b6:a03:4c9::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8422.12; Thu, 6 Feb 2025 06:01:36 +0000 Received: from BN1PEPF00006001.namprd05.prod.outlook.com (2603:10b6:408:e1:cafe::ef) by BN1PR12CA0002.outlook.office365.com (2603:10b6:408:e1::7) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8398.28 via Frontend Transport; Thu, 6 Feb 2025 06:01:36 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BN1PEPF00006001.mail.protection.outlook.com (10.167.243.233) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8398.14 via Frontend Transport; Thu, 6 Feb 2025 06:01:36 +0000 Received: from BLRDHSRIVAS.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Thu, 6 Feb 2025 00:01:32 -0600 From: Dheeraj Kumar Srivastava To: , , , , , CC: Subject: [PATCH v3 4/8] iommu/amd: Add debugfs support to dump IOMMU command buffer Date: Thu, 6 Feb 2025 11:29:59 +0530 Message-ID: <20250206060003.685-5-dheerajkumar.srivastava@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> References: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: BN1PEPF00006001:EE_|SJ2PR12MB7846:EE_ X-MS-Office365-Filtering-Correlation-Id: 2c3af595-7eaa-4fa1-0465-08dd4673b70b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|376014|82310400026|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?x258MOgmZhdbxZMVaHDRO24+Nisvk8zJuG/KGIYOrACn1bB7LfMuEDMhxqIi?= =?us-ascii?Q?5mx/7lEWotnxa5Ue2x6d9Ov3+hTVtiyi6zOJ+fdJ487OzjNnzg9M93uHNtGw?= =?us-ascii?Q?QcKVDblerai6vNK77KEuvierkB4uwhRfDq7j29UzwUGxihgVQCBDUE4kBmBi?= =?us-ascii?Q?aVItuNM/3DkyknTR7xeNv9I28Mz4C9owBgB8QUKyKIhRO7yl/YGBew2GhTvq?= =?us-ascii?Q?IqN6xF96XAxNBUpDkHuy+SDGoiBGBV5QAhkKp2OscwzF97/MqXLgEYXXkXwH?= =?us-ascii?Q?GfITzW3TSAAg8qG3s/R/yjuXgkD7gC6iBZZnGl8bsQRmWGTRF7R+L6tMtxuK?= =?us-ascii?Q?bQXcUocEXA9zkCSGLWewUv/EQr5L1npGbDGryeXOuRmh/XuG8N8cs/DyRiGb?= =?us-ascii?Q?AADRXds3I8Vy82oq7DPuJrw8gF9rCuAxOjVGcEgHw0O9zvO5RR/vUZ69A3JK?= =?us-ascii?Q?oUXIVSdiTnf0AFfAR5A+IbjZ9cznyzKhIqxBKDHEt5X6rDsCev2KDseZPWK0?= =?us-ascii?Q?wPBs67mie+vcGWfBsW5uIUhlLDEUXLpK3ohuBSsCWB2u2R3xCNEBJccf3Ji8?= =?us-ascii?Q?VKO5bntpXmdF4QJ4/XAlZBV8nDmwV96plWAHiyC2AHBFWZL8OYuUwmAUyThM?= =?us-ascii?Q?ujE4Ul5QROcwCMQbsz4TohEFmFhQgsxb+1HFarPbAP6PY/9/Jag/oeeeWIfJ?= =?us-ascii?Q?X1wAJw1wso35BUanl0fhmpp6qwCFslNcqu4Ss5D6Oh7USvuQsgOs6L2WGwlX?= =?us-ascii?Q?o5jfCTf0r11L7+jfzQBkr83QJwit1YucE8k4VjXEadNxsnXNp0koFnqGAGUW?= =?us-ascii?Q?sepRTC1rlXb1zqnsTgdOmWiDCuP4wiQM0uWmfFtagw9NC7y4oJbdLIVHaFnC?= =?us-ascii?Q?cuNTroyVdtwkUcXmptaw0SV1tlArT7rBGr/C0rOSFN0Efx9aP1mUcgZWOcPT?= =?us-ascii?Q?UY6GEoUuL0mfi3w0LwA5Sn8s6jn6iRwBcvNojhXgkof1zFlcQLGQhgsa1Xs5?= =?us-ascii?Q?rs41xfWqVtWWtnJ/e6k4JGxMFMkKpk/XFSyGvkPjs0AftzlxgTFXvtUohCeW?= =?us-ascii?Q?AJjUl5gxlkrFB5sUdn/CeK3KcBTzxpFy8bGpB6FTP/1LFkTA/28YerRTkBlQ?= =?us-ascii?Q?r8cP6MRlms9w4NI0W29jw/5l+JI5185yVPvE85tPacwZwTYYzHnyqgKyBhED?= =?us-ascii?Q?P9ZWPFrMwmpSAISe6sY37qKwhpk29Q1Jbz8F5MHhRiplgzzxHD00NUywjT0d?= =?us-ascii?Q?CrYZDBOvrwbgAT1X309E7uJCsfaWhZSjecmwdnziWb90J7YETW8xvXeamK03?= =?us-ascii?Q?2zqsIIvahtCRw+5nZv8KWfY9/WAk/xv6eV0FDJSttt4nF6XFHLYIs/cK1SUX?= =?us-ascii?Q?t0LZTHg/LZ9KB0hIebLbawjQWOZ44JL7zE8Ba2ePnoeLw1oYCbg978Xs16k6?= =?us-ascii?Q?hNr4SdD2lB0ipDjqoaIs4zxfwV3cY8k7F3jWNmA+uNKd80gTjPskwiFMDDgI?= =?us-ascii?Q?+Yux9pMeu1uSaB4=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)(36860700013)(376014)(82310400026)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Feb 2025 06:01:36.1833 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2c3af595-7eaa-4fa1-0465-08dd4673b70b 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: BN1PEPF00006001.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB7846 Content-Type: text/plain; charset="utf-8" IOMMU driver sends command to IOMMU hardware via command buffer. In cases where IOMMU hardware fails to process commands in command buffer, dumping it is a valuable input to debug the issue. IOMMU hardware processes command buffer entry at offset equals to the head pointer. Dumping just the entry at the head pointer may not always be useful. The current head may not be pointing to the entry of the command buffer which is causing the issue. IOMMU Hardware may have processed the entry and updated the head pointer. So dumping the entire command buffer gives a broad understanding of what hardware was/is doing. The command buffer dump will have all entries from start to end of the command buffer. Along with that, it will have a head and tail command buffer pointer register dump to facilitate where the IOMMU driver and hardware are in the command buffer for injecting and processing the entries respectively. Command buffer is a per IOMMU data structure. So dumping on per IOMMU basis. eg. To get command buffer dump for iommu #cat /sys/kernel/debug/iommu/amd/iommu/cmdbuf Signed-off-by: Dheeraj Kumar Srivastava --- drivers/iommu/amd/amd_iommu_types.h | 7 +++++++ drivers/iommu/amd/debugfs.c | 26 ++++++++++++++++++++++++++ drivers/iommu/amd/iommu.c | 7 ------- 3 files changed, 33 insertions(+), 7 deletions(-) diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_io= mmu_types.h index 0bbda60d3cdc..c4ca6d9c6b51 100644 --- a/drivers/iommu/amd/amd_iommu_types.h +++ b/drivers/iommu/amd/amd_iommu_types.h @@ -892,6 +892,13 @@ struct dev_table_entry { }; }; =20 +/* + * Structure defining one entry in the command buffer + */ +struct iommu_cmd { + u32 data[4]; +}; + /* * Structure to sture persistent DTE flags from IVHD */ diff --git a/drivers/iommu/amd/debugfs.c b/drivers/iommu/amd/debugfs.c index dc5fdc905754..bf718e7258c5 100644 --- a/drivers/iommu/amd/debugfs.c +++ b/drivers/iommu/amd/debugfs.c @@ -103,6 +103,30 @@ static int iommu_capability_show(struct seq_file *m, v= oid *unused) } DEFINE_SHOW_STORE_ATTRIBUTE(iommu_capability); =20 +static int iommu_cmdbuf_show(struct seq_file *m, void *unused) +{ + struct amd_iommu *iommu =3D m->private; + struct iommu_cmd *cmd; + unsigned long flag; + u32 head, tail; + int i; + + raw_spin_lock_irqsave(&iommu->lock, flag); + head =3D readl(iommu->mmio_base + MMIO_CMD_HEAD_OFFSET); + tail =3D readl(iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); + seq_printf(m, "CMD Buffer Head Offset:%d Tail Offset:%d\n", + (head >> 4) & 0x7fff, (tail >> 4) & 0x7fff); + for (i =3D 0; i < CMD_BUFFER_ENTRIES; i++) { + cmd =3D (struct iommu_cmd *)(iommu->cmd_buf + i * sizeof(*cmd)); + seq_printf(m, "%3d: %08x%08x%08x%08x\n", i, cmd->data[0], + cmd->data[1], cmd->data[2], cmd->data[3]); + } + raw_spin_unlock_irqrestore(&iommu->lock, flag); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(iommu_cmdbuf); + void amd_iommu_debugfs_setup(void) { struct amd_iommu *iommu; @@ -118,5 +142,7 @@ void amd_iommu_debugfs_setup(void) &iommu_mmio_fops); debugfs_create_file("capability", 0644, iommu->debugfs, iommu, &iommu_capability_fops); + debugfs_create_file("cmdbuf", 0444, iommu->debugfs, iommu, + &iommu_cmdbuf_fops); } } diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index b48a72bd7b23..b23fabea0e8a 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -62,13 +62,6 @@ static const struct iommu_dirty_ops amd_dirty_ops; =20 int amd_iommu_max_glx_val =3D -1; =20 -/* - * general struct to manage commands send to an IOMMU - */ -struct iommu_cmd { - u32 data[4]; -}; - /* * AMD IOMMU allows up to 2^16 different protection domains. This is a bit= map * to know which ones are already in use. --=20 2.25.1 From nobody Thu Dec 18 03:19:10 2025 Received: from NAM04-BN8-obe.outbound.protection.outlook.com (mail-bn8nam04on2086.outbound.protection.outlook.com [40.107.100.86]) (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 DE10F38DD1 for ; Thu, 6 Feb 2025 06:01:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.100.86 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821717; cv=fail; b=pjJvJ/qwQPqTHcgssz1r4TvqEC/VtBqcEIF4fKUt0sqp6hM7RB05XCxQVVAJcYQrptb3V/3Eg1ohMO0XAe4/pPpBYtiWaKTt6Cxh6ayf1etkNrWqKakT8/wTdM/Gr1zxcpyidq9D7k036RNW9gmpLVhZyhosL1it6jjTiRRIsnc= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821717; c=relaxed/simple; bh=3nRU2n0xOCsINA+4oPV21gOq2tNrfyvRmIxXuBfKOn4=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=mc3giM3cukx2o/UuHceYLGVAOY0eUfgeErlgBtP4dnRY1Y44Znm7FZyDdv8YMQGUFsXIFgPK+I56teq3SbBw6xxtckJ/Y6oyBc6Y5qaojxRi38PgJyGBYxP9EZLxYzu7seCzEC+zMLFvTEZfRU+hToiw5L453Yknvm459RI7Tpg= 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=5aITHWfX; arc=fail smtp.client-ip=40.107.100.86 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="5aITHWfX" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=KtOrV7yxVPUp3zWDzssrTM8DMZsOel4sexmjyzlbE/mcJszXGztJPOwO4FLm8JIdChxW+83EBjpENTHFcfIBGH6d87zQe8qF5xBXHAcI139ZcD7RLyz1mRo7m8jpuZc0kXp49o3toA5p+SME5QIT8dsw2/MGBwi5y/umZc0+8dFm5D+rSZ4W+nKg4FJD7zwZsZNUrwSKjyyr/yVPtOTjWNRKLSk41VMBaOB5Gr5TAgU27/AQN1k/hO1Ku2QrwujrtEYGSVxjDU8XMpuGiF6cyWQ4ULaVIzI/Q7JU3ejJGZX40bzEJfV/8WvtzNv2OtUViet2H3axIzPQq+8178Y9wA== 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=nh3MbAyOyC305gTn6FCpp5rC+eq0/NCQp6jmpeersx8=; b=dbaqM/9THAYQRQfXgImqAfIrHalmNsIwC1G8FNif5eVa0qL6KNqJtRiIxHQQDOzU2aSo1X7qABMY3W4Xl5NQtmKe/LrtX5z8kG76fzY/7A47EmGzdX72g3LBjqy5cfLqmguJpVBInmLQURHpfUbpa3duxLe7NdoJ8RdMdAidUXsky4C4flz+y0YP4VzbmtrA4ZaljSCyRmzJtyqbDfkySSyOf4mmQKlKfmpbLDB5CtTCT43hOt6jxaewY+AWQeV+ptOXu/0atvGhTl/SzEMUlObUlkaho/yXqX0bHaqRrfaJx0y8WUjnOWlIy5qEW6oCUaFDZFITdhe55plwrHzH9A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=8bytes.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) 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=nh3MbAyOyC305gTn6FCpp5rC+eq0/NCQp6jmpeersx8=; b=5aITHWfXjIuhMz81vVmNomkmKjnavyHJ0tZJ+DK/g1DGwcg0UBfOBehMCryEyUEuC9sogzwcwsbidOouOuMFkuurD+Dw9e7hl8ViubLBpvSmvkUwt17MhujT7r+EcurUCdC1adAuiZOJSdm0S0yGnhJHY1pTI+14Eakno2PkXYg= Received: from BN0PR04CA0204.namprd04.prod.outlook.com (2603:10b6:408:e9::29) by SJ2PR12MB8062.namprd12.prod.outlook.com (2603:10b6:a03:4c8::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8422.11; Thu, 6 Feb 2025 06:01:53 +0000 Received: from BN1PEPF00005FFF.namprd05.prod.outlook.com (2603:10b6:408:e9:cafe::ba) by BN0PR04CA0204.outlook.office365.com (2603:10b6:408:e9::29) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8398.28 via Frontend Transport; Thu, 6 Feb 2025 06:01:52 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BN1PEPF00005FFF.mail.protection.outlook.com (10.167.243.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8398.14 via Frontend Transport; Thu, 6 Feb 2025 06:01:52 +0000 Received: from BLRDHSRIVAS.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Thu, 6 Feb 2025 00:01:49 -0600 From: Dheeraj Kumar Srivastava To: , , , , , CC: Subject: [PATCH v3 5/8] iommu/amd: Add support for device id user input Date: Thu, 6 Feb 2025 11:30:00 +0530 Message-ID: <20250206060003.685-6-dheerajkumar.srivastava@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> References: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: BN1PEPF00005FFF:EE_|SJ2PR12MB8062:EE_ X-MS-Office365-Filtering-Correlation-Id: e480b350-33f6-44cb-b9f1-08dd4673c0c8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|36860700013|82310400026|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?alDy4IW3hNaGftrYEMO1BKuEyhNyYgwONhiLx4ote6VClHtwQdrFZtok2Wx4?= =?us-ascii?Q?XkgsHuQWtzA87WA+RU/G63dsDd7CPi4HY6gI/XnEtJA6dWxISt/lFpazOQZ2?= =?us-ascii?Q?i0GsByIHuBMcTxaNQIDz1Jxy4q3sHE7dimEfBIuJNE4rmnnqDX3EZ+02ZaeP?= =?us-ascii?Q?27y+wy/WB3/tPwQF26CJhesmwlWQunmda2GrK3aaxEL/nVh0Plg1Q4eU/MCP?= =?us-ascii?Q?KTr0TIjY9lBp5WndDdeLSWZnLePNjuvQ3gMCEnI3MDnLGr28b4CDaMTBYpuR?= =?us-ascii?Q?RKltJaYXHDbA7xKDS3z1bqnxCnzkcUCikDxnznXDXZVxrAiYHc/U6XiDMBvj?= =?us-ascii?Q?4TheUKS4SyHEZHdtEtFCHqzgJhHKrQ2URLzMHbXvqrV/YiCdzMbIMzl9sAJT?= =?us-ascii?Q?6N6qMqFiukre11pFTmo3PhoF8FqNaXXrTjjbQah4gdHAll1ZvVzu4gMfX/fw?= =?us-ascii?Q?dDg6pzNavBhrHLlHr2canLVgj7MEHzfRcmHX9URriuVTigSbFU2FtNKCXm5i?= =?us-ascii?Q?KLhEDmSxReVJ+vAizbzNs/mXGI1PYIWsqcJNTZtxLLN6oEteKd/K7zFqRWwu?= =?us-ascii?Q?n6SAaME4KkEZ2utVOmH6MPJoHP9jkMllgHnhrJwGBKpjTdFFFPblm/hal6tm?= =?us-ascii?Q?rl1APw5dCGs8fNkqI6SStNoFZI3KOekxFImKT3Im+AIJrxWrAbOtzsXr5Jkh?= =?us-ascii?Q?454BJIqa024Rz+CyGuvpt3SD1tVEP5AJHKXneKppNO5Z25ZST5qG9+9C43yO?= =?us-ascii?Q?Ike7ETeml9aYFSwaxRZhECWrnZ45sU6feUlVkmllV2U9K5P++mpmzHMeozCN?= =?us-ascii?Q?SRbqsR28Nv5zCtu27Gua5f45ASOMdrppND9Br5Wmry8lDNGPSqb0E8a37qRF?= =?us-ascii?Q?yVpbX3+p16D4/dQZW4+O6d+/EY+vpHBLoVq8nL6bjZGO3SW3+WixXhPBxi/x?= =?us-ascii?Q?ovFNOiAAg8dAGcaSDwN8H2jgxMaimjhsJOsQP9MP6el7Akqlqkkiud4at7uQ?= =?us-ascii?Q?OSizQCAwf/K9G+nNG58GZIwTQ+UtlCBQ2Aoyp+CEw6scanDFo2GsNaKdAMel?= =?us-ascii?Q?UbrfHgLBjcYn5J8d8MZDwE0rOk0682IUt+KCiCm4ygRRSZdC4E4lDbL6/PMh?= =?us-ascii?Q?tfpW5hZSuHpj4XjV95PLnb2ZfhYTQ9PLo5vPLGy3X+BCrGG/peityGOxQbyJ?= =?us-ascii?Q?X9P1JzmdwqzmPh7fiveArzIpH3+kyui7r9bBTDs2mF0kBCmyn18zSmtvv/IV?= =?us-ascii?Q?QHU+epZWOFo90XL4NY3zk9WYbiy2gJgxjmckvq+/O9OBPii7bx5tpH8dPsPa?= =?us-ascii?Q?dB/0ax+p1jvx308JFXBai6shdLdJp8CjXvLN+OIx/xX9N/lbriqCR9VkXges?= =?us-ascii?Q?sG/8KROYgEbPzh2711E7cQRDStUer/JzX5r4brA8/GGUvUOjpNCFGraOae+A?= =?us-ascii?Q?DrPzX73jyZTVm1qZA1F3HJVfNdsJ0Bw2GstN0nPqi9MokYHEYpwVPrVamCgL?= =?us-ascii?Q?w8rZDdPUVgoU794=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)(376014)(36860700013)(82310400026)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Feb 2025 06:01:52.5262 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e480b350-33f6-44cb-b9f1-08dd4673c0c8 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: BN1PEPF00005FFF.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8062 Content-Type: text/plain; charset="utf-8" Device id user input is needed for dumping IOMMU data structures like device table, IRT etc in AMD IOMMU debugfs. eg. 1. # echo 0000:01:00.0 > /sys/kernel/debug/iommu/amd/devid # cat /sys/kernel/debug/iommu/amd/devid Output : 0000:01:00.0 2. # echo 01:00.0 > /sys/kernel/debug/iommu/amd/devid # cat /sys/kernel/debug/iommu/amd/devid Output : 0000:01:00.0 Signed-off-by: Dheeraj Kumar Srivastava --- drivers/iommu/amd/debugfs.c | 78 +++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) diff --git a/drivers/iommu/amd/debugfs.c b/drivers/iommu/amd/debugfs.c index bf718e7258c5..f292b93f9318 100644 --- a/drivers/iommu/amd/debugfs.c +++ b/drivers/iommu/amd/debugfs.c @@ -16,9 +16,11 @@ static struct dentry *amd_iommu_debugfs; =20 #define MAX_NAME_LEN 20 #define OFS_IN_SZ 8 +#define DEVID_IN_SZ 16 =20 static int mmio_offset =3D -1; static int cap_offset =3D -1; +static int sbdf =3D -1; =20 static ssize_t iommu_mmio_write(struct file *filp, const char __user *ubuf, size_t cnt, loff_t *ppos) @@ -127,6 +129,80 @@ static int iommu_cmdbuf_show(struct seq_file *m, void = *unused) } DEFINE_SHOW_ATTRIBUTE(iommu_cmdbuf); =20 +static ssize_t devid_write(struct file *filp, const char __user *ubuf, + size_t cnt, loff_t *ppos) +{ + struct amd_iommu_pci_seg *pci_seg; + int seg, bus, slot, func; + struct amd_iommu *iommu; + char *srcid_ptr; + u16 devid; + int i; + + sbdf =3D -1; + + if (cnt >=3D DEVID_IN_SZ) + return -EINVAL; + + srcid_ptr =3D memdup_user_nul(ubuf, cnt); + if (IS_ERR(srcid_ptr)) + return PTR_ERR(srcid_ptr); + + i =3D sscanf(srcid_ptr, "%x:%x:%x.%x", &seg, &bus, &slot, &func); + if (i !=3D 4) { + i =3D sscanf(srcid_ptr, "%x:%x.%x", &bus, &slot, &func); + if (i !=3D 3) { + kfree(srcid_ptr); + return -EINVAL; + } + seg =3D 0; + } + + devid =3D PCI_DEVID(bus, PCI_DEVFN(slot, func)); + + /* Check if user device id input is a valid input */ + for_each_pci_segment(pci_seg) { + if (pci_seg->id !=3D seg) + continue; + if (devid > pci_seg->last_bdf) { + kfree(srcid_ptr); + return -EINVAL; + } + iommu =3D pci_seg->rlookup_table[devid]; + if (!iommu) { + kfree(srcid_ptr); + return -ENODEV; + } + break; + } + + if (pci_seg->id !=3D seg) { + kfree(srcid_ptr); + return -EINVAL; + } + + sbdf =3D PCI_SEG_DEVID_TO_SBDF(seg, devid); + + kfree(srcid_ptr); + + return cnt; +} + +static int devid_show(struct seq_file *m, void *unused) +{ + u16 devid; + + if (sbdf >=3D 0) { + devid =3D PCI_SBDF_TO_DEVID(sbdf); + seq_printf(m, "%04x:%02x:%02x:%x\n", PCI_SBDF_TO_SEGID(sbdf), + PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid)); + } else + seq_puts(m, "No or Invalid input provided\n"); + + return 0; +} +DEFINE_SHOW_STORE_ATTRIBUTE(devid); + void amd_iommu_debugfs_setup(void) { struct amd_iommu *iommu; @@ -145,4 +221,6 @@ void amd_iommu_debugfs_setup(void) debugfs_create_file("cmdbuf", 0444, iommu->debugfs, iommu, &iommu_cmdbuf_fops); } + debugfs_create_file("devid", 0644, amd_iommu_debugfs, NULL, + &devid_fops); } --=20 2.25.1 From nobody Thu Dec 18 03:19:10 2025 Received: from NAM11-CO1-obe.outbound.protection.outlook.com (mail-co1nam11on2044.outbound.protection.outlook.com [40.107.220.44]) (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 B5BEC2E64A for ; Thu, 6 Feb 2025 06:02:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.220.44 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821766; cv=fail; b=QHWPCpeQAmifQeaVJJymCJ0lXCbOo6rwSv2xIRIhDrutErmu0bZ2eKnKKQNqlLhr1EvqSxERq80IPBpWvW/5dkH1Nj7WMnIHPcwBYvGFM7MaPBquO0TYiAw3CQty1j63EgSJVjBtT/MlvFkrAc/3vE3a3ozV++5a2Vp9n2w9l2k= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821766; c=relaxed/simple; bh=H1+UHwAmoiKlWFHZWhCHuYeSoSOF3Ai5vtefPPQ8XrI=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=iD5HIpDEjyCgeV4hW9CtPcE0+qtqOnnAIzNUL7vgQnawM+SWVCNodb3XRttH/aqGGSpO/bE/1pXj/GcX9vTFjx3gwY7X3tEbQVSwwbQDMUjoeHfwtNy8Uo07k0PD1YwWv6m4pSr2jmMJDCtEkyQwwqkiEl+Rvd6ZaZoGZQZtQ0U= 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=dx9pbTcy; arc=fail smtp.client-ip=40.107.220.44 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="dx9pbTcy" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=JFqc+y9C1RdtOkK8WipBbiYqWJIYzDqv7weqbKGc2jtYIZPvPczvs6InHV0z0hYMp9zqxiCRWbgvYoHCRsOygij9zUpSKrWL3Wus7RtkTRnriqbvtLHMrZnW2Z1wLM+uRh+5BzFAmOEgongm3p16/TaVa81Ia9reWXUkw7urLVrobW5KXgBQMD3p7iKWd9wcMMHelzJzmKOw0KwiytIZkFew5vKgm4MVPYvxoko+hb5Ky39JfbA+6QMiNwvp8dQgEl5wTilf9t9dMDdDCcQ4wJzNAhwguPvf+8NfOeguU/XskyM8RMve7C9SY4+cwq6GvybAyF9My6CFOIu7SoQCtA== 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=A+YOFO0IJJM2pxHYcfVjQS/kfQtiqPwowPEFuW/++BU=; b=zIBjV+2sHKKcNMo4HSFQV24Fe02yOtvpZUL2nkIJFoRWDkTYbiG2SLBE1Z1UH2hdcKwnGVcUfCvXV/3fdHLhbBAlMnw5VV7/KBQcOoBV6fR/iWy2jehAM3eQcPBXpXujT33qLwiqYVU77ZQH25Hzyt/47SW1khvqI/oMIKP918KT2hbByi39bQnl/5cWlotGD4p938K7djPu7GcBrWdp8rbwCO1A5A/Ioh157TTAe4r7l75AF7XFYnYpGYNZdrNLaEaawJYQJNKUC/U0N8/tpIJotDceoTYiflwxCc58psXUPoW0xaXJ+qZoq5undmS5CjQ231M3s3OTnoCu/BY2Sw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=8bytes.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) 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=A+YOFO0IJJM2pxHYcfVjQS/kfQtiqPwowPEFuW/++BU=; b=dx9pbTcyc0FOtXR7kyZfkfweM6LI+gGJc1KfOMORkdCR0/QOP2zkKrk6srUKsDIL1jDr0rXIp3bFZT4iIdH4lTKgR5LNk0twxgY/Uiw9A5/IvN3N1sm1nwfrZyoTcjZS1EO3wB29mHXfJSIJdS+L32zpVaTEQijpXx9Z7I5dFHU= Received: from BN0PR08CA0012.namprd08.prod.outlook.com (2603:10b6:408:142::34) by CH3PR12MB9219.namprd12.prod.outlook.com (2603:10b6:610:197::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8398.25; Thu, 6 Feb 2025 06:02:41 +0000 Received: from BN1PEPF00006002.namprd05.prod.outlook.com (2603:10b6:408:142:cafe::89) by BN0PR08CA0012.outlook.office365.com (2603:10b6:408:142::34) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8398.21 via Frontend Transport; Thu, 6 Feb 2025 06:02:41 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BN1PEPF00006002.mail.protection.outlook.com (10.167.243.234) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8398.14 via Frontend Transport; Thu, 6 Feb 2025 06:02:41 +0000 Received: from BLRDHSRIVAS.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Thu, 6 Feb 2025 00:02:10 -0600 From: Dheeraj Kumar Srivastava To: , , , , , CC: Subject: [PATCH v3 6/8] iommu/amd: Add debugfs support to dump device table Date: Thu, 6 Feb 2025 11:30:01 +0530 Message-ID: <20250206060003.685-7-dheerajkumar.srivastava@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> References: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: BN1PEPF00006002:EE_|CH3PR12MB9219:EE_ X-MS-Office365-Filtering-Correlation-Id: 374a917d-6740-4ed7-9d17-08dd4673ddac X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|36860700013|1800799024|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?ePXIF/xHrpmf1MlT85Q8aDE+bIqKPwYfAuEdJ9Z26zBv2CR0NBQ+9z68YaTv?= =?us-ascii?Q?VYVMjXNnMVnpDHBb3pbax9vc1rKCikgJZO3BRB3IhtSXtqT9e8CGWfPQUPBb?= =?us-ascii?Q?/GjQTr2grYrtDyHWRKXN30iG9ca3F0A44/1j0z4m828Aoj3dBtlu/lrnLHxx?= =?us-ascii?Q?CC3Ya0jGLXX4U070fHWnJIbgO22Y84KNRo00MgmVhjG+CDELOAWmMl7AjiVP?= =?us-ascii?Q?tLcY83IKafJtanCC3OZPlCkLelFRrdlhknkWZWp4GouGE+IKeGvF0eGqqFol?= =?us-ascii?Q?Y7kwoXgCu6GTTLTjNxno2PZvYKpAvHfP58xndy2Mxp4YHDXkjY9p57mbyQGo?= =?us-ascii?Q?zzMO9fzqLAYZzgGPhd/RKUEOsNB3X6ZPHUnmbyihp4CgzPWjgBWpIZggGyD/?= =?us-ascii?Q?vBD9B15QVsbzVNw67YZ4VAHEpHU8gkQqAKblLwZH3ItD3/mSLxzSgfyc7aXZ?= =?us-ascii?Q?fdxzwJ4AvIr3ndaNWPb/movosejbOdI+wsA6nv834VLgpPxCV1grgL//+62Y?= =?us-ascii?Q?6PP5a04BC4gc6CioMyXzJ3n8DRKGrxD4pN0kght4jZ5sJeWBXBdUuHtfelpg?= =?us-ascii?Q?vNm4/M+0jv31tj7pa2UJOw60TVqGQ79AAw+GsyU+1EBbwAyBGJBbKtARlhjQ?= =?us-ascii?Q?hV3BiXZL1Z0czmlxXXTLCcIbUCe4IjSxDc2vKSRXgWGESlr+HYFVzlGcHq82?= =?us-ascii?Q?iof7wDfzRnXPVi7GDhxhPbE4BcXm6qj2xafQBB7NLdijKcJM719rkygb55MK?= =?us-ascii?Q?fqytwlN1s4J5c8hSC3J/Bw35Dkf88BxEv4IRh2I8JbZ+c05VauiHI6o7IdQM?= =?us-ascii?Q?g/esjZAqX2u0Igpl06HDhaxMtHejBS1nBoTvxnjRgA8Et3ahjOu4Akams/bv?= =?us-ascii?Q?MnNZN7HWFb3d6PCLs7nG4HECjbPwBycGhLiK4yKJbYuQt9CtM5C8Nys9YhDA?= =?us-ascii?Q?q8Z2TldjoBT3QBlMzgZ/jbHMsLA+x39ec8KwkT8gBVqCW2sHC0TUqoVVRgie?= =?us-ascii?Q?qJKhzoSTbD3wHp0hJXVLVjMTfNPuO7I/NnsWLt1nQ/IJ8zcGIb6KndDeUWTM?= =?us-ascii?Q?vXR7H8bxXDsDaSV6Gv8X3rM0TQPrKtm/1hN//UfZ7vvIQaXkSxUQWI6tjHyI?= =?us-ascii?Q?R8kdJ54soi62HJhk6VVBC0di3T2HZWba+rGHY0BCnOaY/0VBwxKDv6rz0f64?= =?us-ascii?Q?OazpfyiocjPP3AcEdPOgKBIuGjA0QeF8rXlv1EsXnrvZA5h5An+G+Czjf6Rc?= =?us-ascii?Q?ChADQC1k+betIegI417URoLu8+pgwD/l4lhhM2itSrQK8vfZ0APHZwLriDb1?= =?us-ascii?Q?sDC4Zk9i+uROZ/D2TaprWgXOmS+5/+zU2lon4Zl2T8zIVStfhuU1cESTHejy?= =?us-ascii?Q?Gno1Rc7BKV7Wt5e5b5eMNxKXw42MbcO2G2cJqQ8gRcLQFAQd82HxTVfS7jeK?= =?us-ascii?Q?ewBw697JjvROVjKsp+WCdE96IBI9q5XfLm0Mvt9xlmOU7s/l1TEYO8kPnDSj?= =?us-ascii?Q?YpgiYaeLtVBfjzM=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)(376014)(36860700013)(1800799024)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Feb 2025 06:02:41.0113 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 374a917d-6740-4ed7-9d17-08dd4673ddac 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: BN1PEPF00006002.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB9219 Content-Type: text/plain; charset="utf-8" IOMMU uses device table data structure to get per-device information for DMA remapping, interrupt remapping, and other functionalities. It's a valuable data structure to visualize for debugging issues related to IOMMU. eg. To dump device table entry for a particular device #echo 0000:c4:00.0 > /sys/kernel/debug/iommu/amd/devid #cat /sys/kernel/debug/iommu/amd/devtbl or #echo c4:00.0 > /sys/kernel/debug/iommu/amd/devid #cat /sys/kernel/debug/iommu/amd/devtbl Signed-off-by: Dheeraj Kumar Srivastava --- drivers/iommu/amd/debugfs.c | 49 +++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/drivers/iommu/amd/debugfs.c b/drivers/iommu/amd/debugfs.c index f292b93f9318..1377795814d1 100644 --- a/drivers/iommu/amd/debugfs.c +++ b/drivers/iommu/amd/debugfs.c @@ -203,6 +203,53 @@ static int devid_show(struct seq_file *m, void *unused) } DEFINE_SHOW_STORE_ATTRIBUTE(devid); =20 +static void dump_dte(struct seq_file *m, struct amd_iommu_pci_seg *pci_seg= , u16 devid) +{ + struct dev_table_entry *dev_table; + struct amd_iommu *iommu; + + iommu =3D pci_seg->rlookup_table[devid]; + if (!iommu) + return; + + dev_table =3D get_dev_table(iommu); + if (!dev_table) { + seq_puts(m, "Device table not found"); + return; + } + + seq_printf(m, "%-12s %16s %16s %16s %16s iommu\n", "DeviceId", + "QWORD[3]", "QWORD[2]", "QWORD[1]", "QWORD[0]"); + seq_printf(m, "%04x:%02x:%02x:%x ", pci_seg->id, PCI_BUS_NUM(devid), + PCI_SLOT(devid), PCI_FUNC(devid)); + for (int i =3D 3; i >=3D 0; --i) + seq_printf(m, "%016llx ", dev_table[devid].data[i]); + seq_printf(m, "iommu%d\n", iommu->index); +} + +static int iommu_devtbl_show(struct seq_file *m, void *unused) +{ + struct amd_iommu_pci_seg *pci_seg; + u16 seg, devid; + + if (sbdf < 0) { + seq_puts(m, "Please provide valid device id input\n"); + return 0; + } + seg =3D PCI_SBDF_TO_SEGID(sbdf); + devid =3D PCI_SBDF_TO_DEVID(sbdf); + + for_each_pci_segment(pci_seg) { + if (pci_seg->id !=3D seg) + continue; + dump_dte(m, pci_seg, devid); + break; + } + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(iommu_devtbl); + void amd_iommu_debugfs_setup(void) { struct amd_iommu *iommu; @@ -223,4 +270,6 @@ void amd_iommu_debugfs_setup(void) } debugfs_create_file("devid", 0644, amd_iommu_debugfs, NULL, &devid_fops); + debugfs_create_file("devtbl", 0444, amd_iommu_debugfs, NULL, + &iommu_devtbl_fops); } --=20 2.25.1 From nobody Thu Dec 18 03:19:10 2025 Received: from NAM10-DM6-obe.outbound.protection.outlook.com (mail-dm6nam10on2073.outbound.protection.outlook.com [40.107.93.73]) (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 BD32B157A46 for ; Thu, 6 Feb 2025 06:02:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.93.73 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821781; cv=fail; b=l1rz682fLNor/vS2NprE/ffLES9Nb3OkpuNPpLYeQ+KtZwtg+RSBEzMAntYxTazLPLC/ifgGl3xhxUQzNz/05+qkCs5r43GOYDg6Uhp+PK78NiEI/rtEOUFV4G96CRI3z8gt6KHEKLZDURtbrczFMs4NWOCAqLq7BDZMcjp6o2s= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821781; c=relaxed/simple; bh=n5Zrv0milPp3aa01C1CUZnOp+ICRVwWtzJ7oMxUTlZc=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=RRqsVb942pIsgzbYWqLHurQPbjEEAFMYmPN3uXZ1VxKhyuIUdD2AYkxx8lePJZyaQPlHsC4aqfsShhSDDSa9e24uQpnaKad6RPu/695eJBDFf7L8Qx34So4kP7u3H68nDj5B1IQf/tuMfFTEUrvhTMI8PObwsN8D9Q8bs8GyeMc= 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=eSIKr47c; arc=fail smtp.client-ip=40.107.93.73 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="eSIKr47c" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=AyIr8j7oZvgRKF61PHdj/pyLZuryiUExCouiRvCiXakxJ2nh3R02nGyIqf3xWlLXjOe7WAbTfRRrhP3Tib6Mki/al3uGk3QvAavyQsCMlp1SGrMgFVXRTqDQkPRFGWirLVfJEn0hJ68eBAMwXAwL2Vi5qOyYwoh0fBB/p2zZxcjfmXjfQ/A9syTDZQVTnRVobxZ9lCD1ubjnNfXR/QenjM39UQ4Mnfc7bzOQFNeL7FDb4DFnhcBhUBVIfQjIunzHGnpM7l9G7+xqV+rEHfcPMyi/8h10zAAo8BYBuocPUGGV3BNeeA7pvoDdS8Z4SxmAMHtWPIprf1c4grQgxJq9TQ== 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=eImmYU/fKpRDnyPqWtkYkLhgmPMCfUMMjSqNiAi1jhE=; b=RCwzx6Cab5YEgnc3riy9218SKctWQt+el2lsGGfpeO+d5m2L+Hk4cUKAtH+LfiH5lcBjemTLuHfLnRFJFs6FmnbO2Hjoq1Rac2NkQsijmtglAHkEMooS0fcx1Ft3Hn53jCrbEuUYCNDOArvJEGpZe6N7ovVMiJZAX1XZJgDtphCUBfICQZE7XwRrtd7TKgyeOq3DThU0DCuF9YRdvX+pQIvpwpXnsgyBaeZVToLvk7BDV8NllTwr6xFauqV07+awu7dCsh7QtbLiyFzzz8k1FDRtT9nd5eYpMEwy+pxj1uHpnHfjwFe2NjD9MsU+TJ5yPVnO9ZGP1BPQeiRvR+3vtg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=8bytes.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) 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=eImmYU/fKpRDnyPqWtkYkLhgmPMCfUMMjSqNiAi1jhE=; b=eSIKr47cp+WzRf6AJzqGC2k6pdCIBnwV3R0GS0Aibn5KCrjwt0XytjupWKjGGsMdlp/LgMXJ7/gRtKqzUZQ4715T9oq2MlmUVm+pwPJInPZopbxNBlBCwHFCTllyOWP2nfmta0ygphGbIx6UCiYJDP/pPstjo2C9JbDmwbwC/ww= Received: from BN8PR07CA0019.namprd07.prod.outlook.com (2603:10b6:408:ac::32) by MW4PR12MB6706.namprd12.prod.outlook.com (2603:10b6:303:1e2::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8398.24; Thu, 6 Feb 2025 06:02:57 +0000 Received: from BN1PEPF00005FFE.namprd05.prod.outlook.com (2603:10b6:408:ac:cafe::26) by BN8PR07CA0019.outlook.office365.com (2603:10b6:408:ac::32) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8398.28 via Frontend Transport; Thu, 6 Feb 2025 06:02:56 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BN1PEPF00005FFE.mail.protection.outlook.com (10.167.243.230) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8398.14 via Frontend Transport; Thu, 6 Feb 2025 06:02:56 +0000 Received: from BLRDHSRIVAS.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Thu, 6 Feb 2025 00:02:53 -0600 From: Dheeraj Kumar Srivastava To: , , , , , CC: Subject: [PATCH v3 7/8] iommu/amd: Add debugfs support to dump IRT Table Date: Thu, 6 Feb 2025 11:30:02 +0530 Message-ID: <20250206060003.685-8-dheerajkumar.srivastava@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> References: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: BN1PEPF00005FFE:EE_|MW4PR12MB6706:EE_ X-MS-Office365-Filtering-Correlation-Id: a13f6bd0-ead4-4fe6-4e66-08dd4673e6ef X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|36860700013|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?K7J8cSvu0ek/L4wnHxhqreNGglcr7wQFZxNMac8uBjNKpeyf62fTfAd51+EJ?= =?us-ascii?Q?EZ8G+bSxM8ejcTX/6BnAot4PYqs4mtnNUVVcdD4oJFx7lpAHNoYvAdkcKx5P?= =?us-ascii?Q?myXSuWIszivtp1J0GdFGobybJK1auqulWsGIsPgEf/T5YnxwZnTaWE2BnDay?= =?us-ascii?Q?oj3yS8ndKuToasGXVKZ2v7XZJUgW1E1yrjqKKMoJFlstFnSsKugDGtWnmwIw?= =?us-ascii?Q?Px1XO4T9OZrvs+qHm565dOaC9Jy5zqJ9d7lDnPxnWuYjwSAhgGeaSIzkG6E0?= =?us-ascii?Q?fZw5+qsAjl7pztNEcEpcCgomjTBartVhpGteNb30kp2BDbDALzqjpV4rWhN0?= =?us-ascii?Q?yKaQsb210a0fkjk0DUkJakxidTmmO0mf3scM8N66d78YpC4vouhUyRVRN1ES?= =?us-ascii?Q?mmIGJakhCvIfBvJM0jHTw/EWeYBhsUJGrGZ97oWiAvEXQSudCALkIu8vfzY/?= =?us-ascii?Q?zflYOgwBSICGcZg/FwoC/0IF+CN3FLygY1Ie3Ad4Cfx3Azkul/NLklyyTJXT?= =?us-ascii?Q?5up/zesgXhNMd+InhqStyfLL7n2wPNYtNGeHbBQtB4ih94yrBIpXJaCC4508?= =?us-ascii?Q?QbCGwYiE1I/nGpRpmPK35BdtFYXKr5wb9KYm6ppdTN6FL5TI0GI2/SX7X8t9?= =?us-ascii?Q?IOg9nJwd+4JD7qzKL3HFOPhdYKHGjTBQ3WtpfJufYg/EspBRjG3B4F4wfwOF?= =?us-ascii?Q?Ziouv/qNYID1Kwtr72awMT9awdybORjC62fnbX/4HYK5dNIVHQUmaucaqMHI?= =?us-ascii?Q?x9dOu/A+OYMD/5G+mGLHpK9UlxDkOqjvpIFngIqAWb5CRFuAJYa7V3KQHyMp?= =?us-ascii?Q?vRGHgqQuSgNP40yv45LvmDBtpF9tZaAz1yBA0gaPH/dEV/regUKsr6dGuhYy?= =?us-ascii?Q?swvE8b2Sh9Ee0Yy577OOp0sYo8wMx5+0GuHNlh10HRRInM3tv/T7q6n90DF0?= =?us-ascii?Q?qPx7nkUZymGuHpZzbJPdkERVqxoBhDqNsKW75s/7unSs5XlWF3rCvXqUqg/A?= =?us-ascii?Q?11CXQdvaTxhthYgbByxjOHP6JZQQ8ijk7NWpYoKXPfkVBOau83HH6VRhNkIZ?= =?us-ascii?Q?qtpQBOEtk5z84qxod/rbfCBu8t/RSHXN0SAHJY/Ad62uq4nu7POsld54Vvpr?= =?us-ascii?Q?FKvEeM8b0vlg85EYQATNSSa22PHKdMI0SUZUDOO8NVIiFBJgihZFaFIkTw+X?= =?us-ascii?Q?0rUtpu4aj+YzE/ovHoBCqL2TJjZvLz8ay0Fo9820OnJBaSzNavbkLx10ZKDI?= =?us-ascii?Q?ptPjBY0OvW1TUgC34ARIUAxcXKphWPpfCYqxlPYjECpBk6LjBsCuz8Z5eBjC?= =?us-ascii?Q?nFMqN0KUt3CHaCnSb+f5iLM/Pkp4OaiaUUfQNMvEs6Y/p+PVO4PUuam189u3?= =?us-ascii?Q?pFoIZAimfywAqFc2Cy3M5pq5UMBSWvJH3/xq2twLKvLwINLb5KTX+n54IeZv?= =?us-ascii?Q?qR358X531L4g5pzp5fNVw0K9RKG1iEURLm/HEu0dEB2UjJ5P4MJ36Z4bMBhn?= =?us-ascii?Q?JiDz3/wU981IPog=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)(376014)(82310400026)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Feb 2025 06:02:56.5323 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a13f6bd0-ead4-4fe6-4e66-08dd4673e6ef 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: BN1PEPF00005FFE.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB6706 Content-Type: text/plain; charset="utf-8" In cases where we have an issue in the device interrupt path with IOMMU interrupt remapping enabled, dumping valid IRT table entries for the device is very useful and good input for debugging the issue. eg. To dump irte entries for a particular device #echo "c4:00.0" > /sys/kernel/debug/iommu/amd/devid #cat /sys/kernel/debug/iommu/amd/irqtbl | less or #echo "0000:c4:00.0" > /sys/kernel/debug/iommu/amd/devid #cat /sys/kernel/debug/iommu/amd/irqtbl | less Signed-off-by: Dheeraj Kumar Srivastava --- drivers/iommu/amd/debugfs.c | 89 +++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) diff --git a/drivers/iommu/amd/debugfs.c b/drivers/iommu/amd/debugfs.c index 1377795814d1..0aff1d616108 100644 --- a/drivers/iommu/amd/debugfs.c +++ b/drivers/iommu/amd/debugfs.c @@ -11,6 +11,7 @@ #include =20 #include "amd_iommu.h" +#include "../irq_remapping.h" =20 static struct dentry *amd_iommu_debugfs; =20 @@ -250,6 +251,92 @@ static int iommu_devtbl_show(struct seq_file *m, void = *unused) } DEFINE_SHOW_ATTRIBUTE(iommu_devtbl); =20 +static void dump_128_irte(struct seq_file *m, struct irq_remap_table *tabl= e) +{ + struct irte_ga *ptr, *irte; + int index; + + for (index =3D 0; index < MAX_IRQS_PER_TABLE; index++) { + ptr =3D (struct irte_ga *)table->table; + irte =3D &ptr[index]; + + if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) && + !irte->lo.fields_vapic.valid) + continue; + else if (!irte->lo.fields_remap.valid) + continue; + seq_printf(m, "IRT[%04d] %016llx%016llx\n", index, irte->hi.val, irte->l= o.val); + } +} + +static void dump_32_irte(struct seq_file *m, struct irq_remap_table *table) +{ + union irte *ptr, *irte; + int index; + + for (index =3D 0; index < MAX_IRQS_PER_TABLE; index++) { + ptr =3D (union irte *)table->table; + irte =3D &ptr[index]; + + if (!irte->fields.valid) + continue; + seq_printf(m, "IRT[%04d] %08x\n", index, irte->val); + } +} + +static void dump_irte(struct seq_file *m, u16 devid, struct amd_iommu_pci_= seg *pci_seg) +{ + struct irq_remap_table *table; + unsigned long flags; + + table =3D pci_seg->irq_lookup_table[devid]; + if (!table) { + seq_printf(m, "IRQ lookup table not set for %04x:%02x:%02x:%x\n", + pci_seg->id, PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid)); + return; + } + + seq_printf(m, "DeviceId %04x:%02x:%02x:%x\n", pci_seg->id, PCI_BUS_NUM(de= vid), + PCI_SLOT(devid), PCI_FUNC(devid)); + + raw_spin_lock_irqsave(&table->lock, flags); + if (AMD_IOMMU_GUEST_IR_GA(amd_iommu_guest_ir)) + dump_128_irte(m, table); + else + dump_32_irte(m, table); + seq_puts(m, "\n"); + raw_spin_unlock_irqrestore(&table->lock, flags); +} + +static int iommu_irqtbl_show(struct seq_file *m, void *unused) +{ + struct amd_iommu_pci_seg *pci_seg; + u16 devid, seg; + + if (!irq_remapping_enabled) { + seq_puts(m, "Interrupt remapping is disabled\n"); + return 0; + } + + if (sbdf < 0) { + seq_puts(m, "Please provide valid device id input\n"); + return 0; + } + + seg =3D PCI_SBDF_TO_SEGID(sbdf); + devid =3D PCI_SBDF_TO_DEVID(sbdf); + + for_each_pci_segment(pci_seg) { + if (pci_seg->id !=3D seg) + continue; + dump_irte(m, devid, pci_seg); + break; + } + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(iommu_irqtbl); + void amd_iommu_debugfs_setup(void) { struct amd_iommu *iommu; @@ -272,4 +359,6 @@ void amd_iommu_debugfs_setup(void) &devid_fops); debugfs_create_file("devtbl", 0444, amd_iommu_debugfs, NULL, &iommu_devtbl_fops); + debugfs_create_file("irqtbl", 0444, amd_iommu_debugfs, NULL, + &iommu_irqtbl_fops); } --=20 2.25.1 From nobody Thu Dec 18 03:19:10 2025 Received: from NAM10-DM6-obe.outbound.protection.outlook.com (mail-dm6nam10on2065.outbound.protection.outlook.com [40.107.93.65]) (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 0A7E01FAC52 for ; Thu, 6 Feb 2025 06:03:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.93.65 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821800; cv=fail; b=vDGTFhSuXbev790JOBbYzDYp6pBCYQeeCtRMw4usoVSkXOecR/vCqaJaJad/Tvpw9tSuGlb/mjAmTGppFh3dEiLRU9ZAaVbXP/EUAqIaN6Lt0vDP5j2QYu7zAKVvYkrq0nhnvOyqWjQkec5OqM9DJiO3h/7Q06O0m/BNvYYzVUY= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738821800; c=relaxed/simple; bh=cQ7yRCUwSoB2DVmd2P1HeGf546fLmATSXNVT9cp7ucc=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=BwzL0ippGM7JCE/5F5BTw3EjR/pAZ2JtbTTCRWzz57gTYR3q3EZFP0MWX7lIL51AlcXHfOUI1S8yiEclhHwZiP34OmHSRhxHTRZoJLB9ly5Gx+aaa+/1lhQOI7FSKpsYWkiY+I/j6Nio9IJF5dH5p0MoZME8pPhdgL1tp7F+eiM= 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=iMrZPc5m; arc=fail smtp.client-ip=40.107.93.65 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="iMrZPc5m" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=rTaOGxfYRYvUuguELYKCmre/Zj8mn+Nzouq97Y1eN0PNcwmhMqJ2mu8rf0HuDC/LeXN0N2apjvQA3lVIU9r3eu9O0o8W1iCEml7rYJjypOzkvXaYx2qEGk2s/K/my1y1YjpVU1bVj0L3g2zMx75tJKXjB6IJUJzfjMG/wD5z8L5D29A9Qx5NkpSfVfg8/VUa8TdxvWPp6vfSWmSpaFqh+ih4ijF8sC+t1MKdykfbUayT29GWEboqfyi8+rl8dOOxH6bcOAIWcLoLGjhIYMNU93Ig7/Bk87SATEBsDIoR7cQH5sU2/9B4TViTMpSnEtzKkqvEs45H0olwHvMMlWBB9Q== 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=PsTlOiPA7UpFAGEhdGhGSDzJG07hWg43GuYdwvy2cbA=; b=Jye3Z/4k7uqHuQ4yDgtshlEUWb0BaSr6r8R3FCPA7sflLqjOeyfTQCsILzj3iuMDfctydeM4zaN3umxpFiUAj26gZjPkTS8K+bK6TmInsbhSck9jXV8dCUx4nXkIyOFLow9kdCAWWxKC/s82EumwxFuZ5Si5BiaJRhPrZWYOXGOsqSx5wcE04vokMjFawMPWJWekLmEVQWKo61Pr05ho03AfmTt1hDjT6Kh/mKAeuiW+XKK0DZqmUAfn97lYve9C/Tk3RvhbHv7i3mu0mdyPOnHPDWMAeAx0LtvIvMTtqWhfnNeOxM/KT1j1sU9B4IjziqskBc3iyy2w5Wxa4BuU6w== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=8bytes.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) 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=PsTlOiPA7UpFAGEhdGhGSDzJG07hWg43GuYdwvy2cbA=; b=iMrZPc5mH4NTf00k8TUFjjBpZsbEiGcQOdEBQCJGqgjOnCZ5sRGr8y2HplJtQHndUaJcBs+W+ZjEyA2X1OAaQkPknUjr6dctQ50OYhPrKxyCAzbbeee2fT9SWiKt8wHhT1JrqbTwCx1VhIxVmdCx31zsWDjDz4yGNSUKqBD+Zxs= Received: from BL1PR13CA0421.namprd13.prod.outlook.com (2603:10b6:208:2c3::6) by PH8PR12MB6676.namprd12.prod.outlook.com (2603:10b6:510:1c3::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8398.24; Thu, 6 Feb 2025 06:03:13 +0000 Received: from BN1PEPF00006001.namprd05.prod.outlook.com (2603:10b6:208:2c3:cafe::2d) by BL1PR13CA0421.outlook.office365.com (2603:10b6:208:2c3::6) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8445.5 via Frontend Transport; Thu, 6 Feb 2025 06:03:12 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BN1PEPF00006001.mail.protection.outlook.com (10.167.243.233) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8398.14 via Frontend Transport; Thu, 6 Feb 2025 06:03:12 +0000 Received: from BLRDHSRIVAS.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Thu, 6 Feb 2025 00:03:09 -0600 From: Dheeraj Kumar Srivastava To: , , , , , CC: Subject: [PATCH v3 8/8] iommu/amd: Add documentation for AMD IOMMU debugfs support Date: Thu, 6 Feb 2025 11:30:03 +0530 Message-ID: <20250206060003.685-9-dheerajkumar.srivastava@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> References: <20250206060003.685-1-dheerajkumar.srivastava@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: BN1PEPF00006001:EE_|PH8PR12MB6676:EE_ X-MS-Office365-Filtering-Correlation-Id: 6a88cfaa-39ad-4e58-803e-08dd4673f081 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|1800799024|376014|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?6goQmebU5PGGmjwRdUZ+m/bmgOwx1jOz5C8721e6gbRYEwNS+OIhGUS7osed?= =?us-ascii?Q?DVCNafgbZVNGt1pWMEvwdAQJ2OVsHGBkR3BZZ27ODujThy1kGiXqjZ11sHgJ?= =?us-ascii?Q?ux9LPWLLHlzKCvOlAmtd1AqoVakXWDtxC5dci4GmSIWnJ7+DAEy3jhxk461S?= =?us-ascii?Q?pudMMaZYtuCMyE6SF7tI/1cI9M5XmXsWRN/8XhlvjL9QZF63QuUSV2TjQQMg?= =?us-ascii?Q?+YzNJYyJxUCukwceTErWv7upKWf9/Nj1fmZAV0KFrfBRvMm7PqnN4MwvgNoz?= =?us-ascii?Q?fL9EgMTX+MwKzEQhI5/4qC6P34rJr/to1DWJuY0/+YRNj3wJrqmKeSGchKL6?= =?us-ascii?Q?oIu6MO3lbiMG+MH28+sikSosR6pdVjPDj8x4BR0RuIjmmCK6YRAdhOLeFelG?= =?us-ascii?Q?luv7IcD/bE4oebAdC0e08+gyU2Nm9Kt4bNLze/PlntfCs44B2rW8HRWrDY64?= =?us-ascii?Q?rWVfOd3UdbnTvIzbhdyxFXHirCcgACko0MOvRub6jGPh7bFyFV1jRvsHdTCd?= =?us-ascii?Q?x+rXF9xs5pMAWOhVhww7ogruE+Lg0N+HE6z0DxT97oVWE1qwP3TUvLihojJF?= =?us-ascii?Q?LUlPsvHRDHsYyVz60xe+RqqWEgAyrOFqyldtwDMpBogmiQBfgoziJppeCSEw?= =?us-ascii?Q?o5WQ+/QqWSBlG1Zj6kHb208ZHKXdZgZQYEhHmEs2D27xO4OjzpCdzDF7qi+k?= =?us-ascii?Q?kFL4vuGIHEyWpn2K7vcHmqqUCWVpbs+Ko17hHb8kqRtgK/T3NRkyGuuRpeWt?= =?us-ascii?Q?8v14mPcBoqvrhAKF9VSV32xSrGz6qROWip4fOy6/Eli0aGd4/9AOnTwLmHX2?= =?us-ascii?Q?N5ts3ZRkcIUDADuCCbLJj7y03RQIjtOcY4uyp2i3fg+eVcXfBPC+MmdcYT9A?= =?us-ascii?Q?ScFJsWYWKzSGIVrUUyH9p0T+uVgiUsGI/hPYr/g8Uc34JDpwmUiYc3h30En6?= =?us-ascii?Q?ZPbmT3MvibPIObD390Yng1CuEBDFvTgY00l+ba9SvBINivOZI1x16b1ysHbP?= =?us-ascii?Q?WaW3AZB2qShGXri0caVFzLZNbnKtxyaKpHHWwESl358uBocwiMBf/TD5UouR?= =?us-ascii?Q?Pp62uhnbTCsEIyph2139IIuxh8FC+vdFtwWCVhaV4FTswCJ428V6dVl/2HYe?= =?us-ascii?Q?ZbIl5aoXMmEwvF39pquTfOkatMI1j83r3YW7V9ZgeQ4rcgz++50oL/UeWf2q?= =?us-ascii?Q?TGse/FNmswZSj3SM+mDeLFTAHL4BnNBMyWyHs7S45G95gzks0c3GSQUtNV0l?= =?us-ascii?Q?W6yuD9tphh/NkblG4UH0OkMCL8L7hMNO2HVwjKU3y2wfUdCkbHzcJcggapQN?= =?us-ascii?Q?IZSnHsFEspbWWQ92Da7uzQzoLduKk6hPHFgBLiylDPW1ov49ukbPMSBq2KXo?= =?us-ascii?Q?Y9KXDJQWSmcmUI/iJRNUZcTauiAV+a/8KyKOJ+p6sHAS6ExuEXGO0NAk0jkC?= =?us-ascii?Q?XD95ajsBpYOvlhcF+V+yGJRKHQfH/DTwAZWEqb1qvX8j5Ia2RcOoWUJt14Ee?= =?us-ascii?Q?gkCaIPaan3uzGW0=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)(36860700013)(1800799024)(376014)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Feb 2025 06:03:12.6055 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6a88cfaa-39ad-4e58-803e-08dd4673f081 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: BN1PEPF00006001.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB6676 Content-Type: text/plain; charset="utf-8" Add documentation describing how to use AMD IOMMU debugfs support to dump IOMMU data structures - IRT table, Device table, Registers (MMIO and Capability) and command buffer. Signed-off-by: Dheeraj Kumar Srivastava --- Documentation/ABI/testing/debugfs-amd-iommu | 114 ++++++++++++++++++++ 1 file changed, 114 insertions(+) create mode 100644 Documentation/ABI/testing/debugfs-amd-iommu diff --git a/Documentation/ABI/testing/debugfs-amd-iommu b/Documentation/AB= I/testing/debugfs-amd-iommu new file mode 100644 index 000000000000..f318e3418435 --- /dev/null +++ b/Documentation/ABI/testing/debugfs-amd-iommu @@ -0,0 +1,114 @@ +What: /sys/kernel/debug/iommu/amd/iommu/mmio +Date: September 2024 +Contact: Dheeraj Kumar Srivastava +Description: + This is an input read/write access file. In this file, the user input + mmio register offset for iommu to print corresponding mmio register + of iommu. + + Example: + $ echo "0x18" > /sys/kernel/debug/iommu/amd/iommu00/mmio + $ cat /sys/kernel/debug/iommu/amd/iommu00/mmio + + Output: + Offset:0x18 Value:0x0003f48d + +What: /sys/kernel/debug/iommu/amd/iommu/capability +Date: September 2024 +Contact: Dheeraj Kumar Srivastava +Description: + This is an input read/write access file. In this file, the user input + capability register offset for iommu to print correspon= ding capability + register of iommu. + + Example: + $ echo "0x10" > /sys/kernel/debug/iommu/amd/iommu00/capability + $ cat /sys/kernel/debug/iommu/amd/iommu00/capability + + Output: + Offset:0x10 Value:0x00203040 + +What: /sys/kernel/debug/iommu/amd/iommu/cmdbuf +Date: September 2024 +Contact: Dheeraj Kumar Srivastava +Description: + This file is an output read only file that contains iommu command + buffer entries. + + Examples: + $ cat /sys/kernel/debug/iommu/amd/iommu/cmdbuf + + Output: + CMD Buffer Head Offset:339 Tail Offset:339 + 0: 008350011000000100003c0000000000 + 1: 0000000030000005fffff0037fffffff + 2: 008350011000000100003c0100000000 + 3: 0000000030000005fffff0037fffffff + 4: 008350011000000100003c0200000000 + 5: 0000000030000005fffff0037fffffff + 6: 008350011000000100003c0300000000 + 7: 0000000030000005fffff0037fffffff + 8: 008350011000000100003c0400000000 + 9: 0000000030000005fffff0037fffffff + 10: 008350011000000100003c0500000000 + 11: 0000000030000005fffff0037fffffff + [...] + +What: /sys/kernel/debug/iommu/amd/devid +Date: September 2024 +Contact: Dheeraj Kumar Srivastava +Description: + This is an input read/write file that takes device id user input. + This input can be used for dumping iommu data structures like + interrupt remapping table, device table etc. + + Example: + 1. + $ echo 0000:01:00.0 > /sys/kernel/debug/iommu/amd/devid + $ cat /sys/kernel/debug/iommu/amd/devid + + Output: + 0000:01:00.0 + + 2. + $ echo 01:00.0 > /sys/kernel/debug/iommu/amd/devid + $ cat /sys/kernel/debug/iommu/amd/devid + + Output: + 0000:01:00.0 + +What: /sys/kernel/debug/iommu/amd/devtbl +Date: September 2024 +Contact: Dheeraj Kumar Srivastava +Description: + This is an output read only file that contains device table entry for + the device id input given in /sys/kernel/debug/iommu/amd/devid. + + Example: + $ cat /sys/kernel/debug/iommu/amd/devtbl + + Output: + DeviceId QWORD[3] QWORD[2] QWORD[1] = QWORD[0] iommu + 0000:01:00.0 0000000000000000 20000001373b8013 0000000000000038 60000001= 14d7b603 iommu3 + +What: /sys/kernel/debug/iommu/amd/irqtbl +Date: September 2024 +Contact: Dheeraj Kumar Srivastava +Description: + This is an output read only file that contains IRT table valid entries + for the device id input given in /sys/kernel/debug/iommu/amd/devid. + + Example: + $ cat /sys/kernel/debug/iommu/amd/irqtbl + + Output: + DeviceId 0000:01:00.0 + IRT[0000] 00000000000000200000000000000241 + IRT[0001] 00000000000000200000000000000841 + IRT[0002] 00000000000000200000000000002041 + IRT[0003] 00000000000000200000000000008041 + IRT[0004] 00000000000000200000000000020041 + IRT[0005] 00000000000000200000000000080041 + IRT[0006] 00000000000000200000000000200041 + IRT[0007] 00000000000000200000000000800041 + [...] --=20 2.25.1