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Fri, 25 Apr 2025 22:58:39 -0700 From: Nicolin Chen To: , , , CC: , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v2 03/22] iommufd/viommu: Allow driver-specific user data for a vIOMMU object Date: Fri, 25 Apr 2025 22:57:58 -0700 Message-ID: <7031ae5ab6f625e73dbd51b074c2ff8a9923c731.1745646960.git.nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS3PEPF0000C37D:EE_|MW4PR12MB7357:EE_ X-MS-Office365-Filtering-Correlation-Id: b8d0b24f-aac6-45f8-17a0-08dd8487679f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|82310400026|36860700013|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?L3G2OaYf5FzXyzPehmCFgFqFyaR3Wyy9Ae5M2EHMnA3A2Y9UvHViP+nJXFA2?= =?us-ascii?Q?6wAnKB/0Zfog0wVlYuJkPCrINuVR3HZfnzEBO40jQrH9uceD4unAQ6ltpq29?= =?us-ascii?Q?WPZXEHBRn1a2PteK+DRACmKCsqH2BgtL13WeitRQwOdCXiiC8qNeE4dQZZGL?= =?us-ascii?Q?hqkn8duQz2d/9chA64QPVvNetVaQh/zq/KfMAC+bDtlYrgfWTqGEY9PyTOj4?= =?us-ascii?Q?w+BP+vSsbzebhM3RTYlBdyjsiQ2j6L4V4DlR+koqdaNHZHbFEZL2NoIbps/s?= =?us-ascii?Q?tFJlfkLTXakiDS07kLGUy9JkwYoVj9CxgthqtkM9eL2AOMJ9pOuan7M9O4jn?= =?us-ascii?Q?wQXLBcNjFWztThNOjdRcR5NILbJDoqE7xCVEHl6dTNFTYpp5brBsAs4MkDOM?= =?us-ascii?Q?t4TAtprbJjxGjPpub0NK3CYctQj43N/bLviyfFZzc1rYEzJ4Trw3gxE3x437?= =?us-ascii?Q?GMFzLejXD8gujWrYVx8iJ8HNjAIaQTf1YL7U/NiPM2+KOQ7440YBSIJRt/5w?= =?us-ascii?Q?YqiaPwTTU4GmUAqUAIkWksCdMYA2b7ZZEoFA/sBfadqUU2MCZFbtqOHPkq0n?= =?us-ascii?Q?jOhOVVVRj4cAWc/g/GIUKKj9bhputJABJaEU8BgR5nyeGUXQz6C2rITSkg5L?= =?us-ascii?Q?S+oatf5j6vrddLjZNZ2Sdqg42X3vcGPui5DWZ91j2ms7XQVOcUzKvefwirv1?= =?us-ascii?Q?N9hFpge2jFmVU3F3fJ4CoLhn2j/5clOnmrCEoNc6tD25wT7Mco6O0IBGaCgJ?= =?us-ascii?Q?i+kHrsupKiktHVWRlOvvsdarZ8WuMqPxiNgdWQ0Zbv0HmbzU9M51wOtY1X1+?= =?us-ascii?Q?xQqdqA+rxvtpZd2tIObYs8O9i99qxKc8kw6YYIWS9kbm5VoHiEUwDP/V5uIX?= =?us-ascii?Q?wdcm1JCFJOC40KlDHPWq21P7sknaVBN7m7L6QVHjp177M6yfLQlfuo+bSfVG?= =?us-ascii?Q?g4ay7KLzUIKBVJZh/oi9TKSVImUQiCSibqHZeWg+jCFP0iybY3ly5+/9outt?= =?us-ascii?Q?plJSGVo2eTbhnxpT0V9Uc8sljJw4O95uwkQeZtmy03ODzJ4t3ErHij+YFaC+?= =?us-ascii?Q?7UWQHDwVyrd+ggRIg888WwCne7wabFV/2R8fzT8nF5/W97KGfk3aEMY7ASbR?= =?us-ascii?Q?qxK5clgaaQftBPgXUDbpijdgNGvhLY4BLp4wqzO+9OBXoPmhdmFmfrVMz0Zr?= =?us-ascii?Q?yfQM/Knlg9J+oPC8/KGAM1EZA/2K1B1zUYRZAScAJiITqlhhk30SHupLN/mg?= =?us-ascii?Q?e5N9GkkjouR3Sx1P5wLdawa6p/ju2X2EKA2JB/weRkTf4jRgYzrZ2dZbj6Ac?= =?us-ascii?Q?U77wbIIKzQh1LGtSQ2ySFUmn2Up6tEVf6jC1oAX39e4HMtsKraV0isYTBWc/?= =?us-ascii?Q?Ip8lu4v9RqHrgsyrPK1xvvxrzcgYD3wu6CpqPlvk/kGfsyjU7OXIPb3560bS?= =?us-ascii?Q?9QCdoeONnsRMtYUUwPVxIYXDjJZ+knwT9i9fZ4CqPtdMh56QqbGiel1sd1B6?= =?us-ascii?Q?FtGwM9/bBs16OoKmdnc91FghDNc/I224qULD?= X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(376014)(7416014)(82310400026)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Apr 2025 05:58:44.8846 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b8d0b24f-aac6-45f8-17a0-08dd8487679f X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DS3PEPF0000C37D.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB7357 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250425_225853_748823_51719D4D X-CRM114-Status: GOOD ( 12.64 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The new type of vIOMMU for tegra241-cmdqv driver needs a driver-specific user data. So, add data_len/uptr to the iommu_viommu_alloc uAPI and pass it in via the viommu_alloc iommu op. Reviewed-by: Jason Gunthorpe Signed-off-by: Nicolin Chen --- include/uapi/linux/iommufd.h | 6 ++++++ drivers/iommu/iommufd/viommu.c | 8 +++++++- 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h index f29b6c44655e..cc90299a08d9 100644 --- a/include/uapi/linux/iommufd.h +++ b/include/uapi/linux/iommufd.h @@ -965,6 +965,9 @@ enum iommu_viommu_type { * @dev_id: The device's physical IOMMU will be used to back the virtual IOMMU * @hwpt_id: ID of a nesting parent HWPT to associate to * @out_viommu_id: Output virtual IOMMU ID for the allocated object + * @data_len: Length of the type specific data + * @__reserved: Must be 0 + * @data_uptr: User pointer to an array of driver-specific virtual IOMMU data * * Allocate a virtual IOMMU object, representing the underlying physical IOMMU's * virtualization support that is a security-isolated slice of the real IOMMU HW @@ -985,6 +988,9 @@ struct iommu_viommu_alloc { __u32 dev_id; __u32 hwpt_id; __u32 out_viommu_id; + __u32 data_len; + __u32 __reserved; + __aligned_u64 data_uptr; }; #define IOMMU_VIOMMU_ALLOC _IO(IOMMUFD_TYPE, IOMMUFD_CMD_VIOMMU_ALLOC) diff --git a/drivers/iommu/iommufd/viommu.c b/drivers/iommu/iommufd/viommu.c index fffa57063c60..a65153458a26 100644 --- a/drivers/iommu/iommufd/viommu.c +++ b/drivers/iommu/iommufd/viommu.c @@ -17,6 +17,11 @@ void iommufd_viommu_destroy(struct iommufd_object *obj) int iommufd_viommu_alloc_ioctl(struct iommufd_ucmd *ucmd) { struct iommu_viommu_alloc *cmd = ucmd->cmd; + const struct iommu_user_data user_data = { + .type = cmd->type, + .uptr = u64_to_user_ptr(cmd->data_uptr), + .len = cmd->data_len, + }; struct iommufd_hwpt_paging *hwpt_paging; struct iommufd_viommu *viommu; struct iommufd_device *idev; @@ -48,7 +53,8 @@ int iommufd_viommu_alloc_ioctl(struct iommufd_ucmd *ucmd) } viommu = ops->viommu_alloc(idev->dev, hwpt_paging->common.domain, - ucmd->ictx, cmd->type, NULL); + ucmd->ictx, cmd->type, + user_data.len ? &user_data : NULL); if (IS_ERR(viommu)) { rc = PTR_ERR(viommu); goto out_put_hwpt; -- 2.43.0