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Fri, 4 Jul 2025 18:14:04 -0700 From: Nicolin Chen To: , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v8 07/29] iommufd/viommu: Allow driver-specific user data for a vIOMMU object Date: Fri, 4 Jul 2025 18:13:23 -0700 Message-ID: <66d83efac4c8b69fdd7f5b922aa1191ed2cfb4e1.1751677708.git.nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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: CO1PEPF000042AE:EE_|CH3PR12MB7739:EE_ X-MS-Office365-Filtering-Correlation-Id: 0997dfe8-a53f-4e9d-871e-08ddbb6142cb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|376014|7416014|1800799024|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?M5HEH1Z5TwE8TqXhzHr1mSMaOSJ3Qz9jQHVlgPoOomoNfYs70xi8JRyE1dln?= =?us-ascii?Q?gJ+QbRJwgmKZYYMx3VyoasVTAybGCloWFL8QTNqBYu4TxRxNIxwIIMuiMJOp?= =?us-ascii?Q?uXGnXx6UrQ/ue+mIga1XgNaAgMeFPku2i7IIk+dEUA0kLOPEDwPEh9n9feAv?= =?us-ascii?Q?DKuU/l1p4JqC2lxMGn8YXhcIT4yRznOC3qG7msinjbTKP2wZ7bmlpkuchCaX?= =?us-ascii?Q?lfiu6aj7vqlGmN+n3Jun3MDfkr2T5AhyXE8IujBQlJI/AwXfk/emEV2HPvmt?= =?us-ascii?Q?6pySS4SaDFXdfSIQiIvvdZs/ucZnShSRB4T4/y4pKaIISG5KlOuCD1gT+J9e?= =?us-ascii?Q?RCOTW7oHqzu0grCPO14sggeGwMS0Emetcq+zGSyQYrvTgNaL7AI2UjSz3PNk?= =?us-ascii?Q?NxTSpqp1jgKIDsJF1IrVUZEAfhYe51t7gRDu9kQDRu6KVbhol3gqtQHW+o+u?= =?us-ascii?Q?vNbIBbo1EZVoQx6iUIOYxweUikguGmRofVgiNIZ3KvAHwswssqXxDxxJv/rv?= =?us-ascii?Q?ImsC2TfOoFbW1l7gIfMlUdwrN1eZizGRtcr+EjJmvsQ1sgZSalMIQaZTJeNw?= =?us-ascii?Q?8LGrkCrwS1foHmcJom8IjWuVi2bgbJ0ScomOBgiz98M+dfXtyzg8CYKEUh8c?= =?us-ascii?Q?dO8/Jdz+3yMtwjw4v3uwalhINZBXtN7lfK/WdUKRFHJcRN6KYpL3ssb+uwxN?= =?us-ascii?Q?2m6SyDh/Q1y3c/iv0mHNHkeH4hOprX14WgtgyM3k2FdPwR3OO3+AGugwTvP7?= =?us-ascii?Q?bT9yj4fp8KKDmSsCNOqX1wXdKAvTt5/PVG/OD7YzkPzfWsdd8mEtCFv9bC/u?= =?us-ascii?Q?/XbiVAQOLgY0w3LAhCaner1YDD42PdHxZw6o2IVezGRCzwmsDwN1zFVNK3oK?= =?us-ascii?Q?OkwurOtrZ1rOXXu02BUzbkQhk2nEvhEvafm+94OpcOHhSUfo4iUrjVnUCvp0?= =?us-ascii?Q?EJdpNEnljYUlrXe3Qk1dObkKFBqB2Xcg+uxQku31FQ6tUHLpDPzELUglijv1?= =?us-ascii?Q?QooCiTLDysbwVf5ROhHSDYnk+K1XQQeJ8nQXKnpPeQ59JKUMBqZd2pf+6Nxl?= =?us-ascii?Q?+HL4apFfGwfJrWVr3mjW/MZn6HU5oyc7XAsW5vL5SeVavCbzCeYwt0PFQCBk?= =?us-ascii?Q?H1L9M8MZmrmbF69hYzqGMbJG3U9t6XcsTgLNFI0b9nmbIVWYPokRjwVW69zg?= =?us-ascii?Q?58Z7XAPZ89VtJKOsZGUQ2iqyp2x0C8jnocD5B8cQxOLruz0+B4QenhsV6xZD?= =?us-ascii?Q?CWxueMxA3zo4IgUi1Ph7rmzzhY/QvG3eBkte/EEGuvW7EqfmemptcVgrzhhp?= =?us-ascii?Q?qpxneya2XCElSfjTUoXOzEQJ/QHl4Zl/hQpIDUaHK30jT0InAmMee2JlLZN1?= =?us-ascii?Q?r5GrKVfW41tqYt19xqnigaowHhOCb5eO7NESfOzz4hkkKIdSdR/mgk3pfp83?= =?us-ascii?Q?LVS92srrbdxyjK1I1lC36qy4HhpVKx6V6fItul/AgzIz7MZw2a70LROgY0BS?= =?us-ascii?Q?nSYykvjVmxBQmMac9gy25AbqVbtPVJ8Fzao3?= X-Forefront-Antispam-Report: CIP:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230040)(36860700013)(82310400026)(376014)(7416014)(1800799024)(7053199007);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Jul 2025 01:14:16.2093 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 0997dfe8-a53f-4e9d-871e-08ddbb6142cb X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF000042AE.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB7739 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_init iommu op. Reviewed-by: Jason Gunthorpe Reviewed-by: Lu Baolu Acked-by: Pranjal Shrivastava Acked-by: Alok Tiwari Reviewed-by: Vasant Hegde Reviewed-by: Kevin Tian 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 4bc05e4621c1..04eee77335cf 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 a 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 2009a421efae..c0365849f849 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; @@ -84,7 +89,8 @@ int iommufd_viommu_alloc_ioctl(struct iommufd_ucmd *ucmd) */ viommu->iommu_dev = __iommu_get_iommu_dev(idev->dev); - rc = ops->viommu_init(viommu, hwpt_paging->common.domain, NULL); + rc = ops->viommu_init(viommu, hwpt_paging->common.domain, + user_data.len ? &user_data : NULL); if (rc) goto out_put_hwpt; -- 2.43.0