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Thu, 8 May 2025 20:03:02 -0700 From: Nicolin Chen To: , , , CC: , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v4 03/23] iommufd/viommu: Allow driver-specific user data for a vIOMMU object Date: Thu, 8 May 2025 20:02:24 -0700 Message-ID: <86b279e902a3fe624ca9261b84f378d62c5049e8.1746757630.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: CO1PEPF000066EC:EE_|IA1PR12MB7495:EE_ X-MS-Office365-Filtering-Correlation-Id: 13ead9c8-3874-4f63-e648-08dd8ea609ee X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700013|1800799024|7416014|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?yyFjACHmf340EXuoi2LI2MLRmBzH7Wnq5qR7ip0xtwj0AnA1snJliEE1KK5Q?= =?us-ascii?Q?GTzrqbHYZ3XC4FzpSsETYpw4Ickg8r9+A2Kk5/EgR2t1Ty5c3ahdGMt1VlnP?= =?us-ascii?Q?6fXrtJyTW0X+wGs1txdn1Kg8HdE9PIb6gzgWb79XzbeyOzkfoT4ZcosfkiYj?= =?us-ascii?Q?9aJ5ztA7DMmE/HOT1YQeTjWtCZdgBoA+FOXT3xkvczhm8HMTSg3sgdV9Wp1O?= =?us-ascii?Q?Q6eF4ZyqlgVaP+lz29l4CBalgPI7iXyV8IQt9FWk1T/a79QQ+wbfjLjompu5?= =?us-ascii?Q?qWQp/KCczJ2ybGc2fU5J7drqC20v3GNKbJabj8Fwe2EtMScq9tkGjYpFLVMC?= =?us-ascii?Q?ter8WqiVMidm3sm0HAV+6B9TnyUS7BFpavrBTCuTbBZuQK1I/9xefwiztrrt?= =?us-ascii?Q?EMcUiZMiXKA3dtYP0EwCor/2EhuFpZrPH7p0tkc4QpdgTiV4gOXwSb3vFwSi?= =?us-ascii?Q?HIWg8JlrgA3P1709tgWRSfUklJ1Lls0nofPEnwI65xY0NmLXEGvARv86JtVM?= =?us-ascii?Q?MN9+74wnWuHH2SwVFRSdVOZ3Z7qu6znph0aXyUt+QRJ9qoAmQZ4qdmjmJih7?= =?us-ascii?Q?ws7tkukFnWhp//rMbWQ3QZcJKStfDtH1G7G7uoJJDEa1C1Nk4DD5qBD9YNYj?= =?us-ascii?Q?4bgzBKS9GuvxkGCuv7T4Lm6EmLADvkZ21ALce5l5vrJhYTOTxQdGXiDJm3/Q?= =?us-ascii?Q?RCjSLAsMqDRl3x19QJF2bDgShbhBzFDse0845Uw5175TVTz9nkHSzP+9Ji6I?= =?us-ascii?Q?6XDCZmgAiYLLQe5tUaXzAs0a9K3apHZr1sXHx0dANusL5WSs9FJdkiiR11T3?= =?us-ascii?Q?BM42WZq+JOsdxQNRE4aGTDao8fD+yuaaKH23jehhtm74AdIrLdQMcVIpdTtr?= =?us-ascii?Q?9zqerYplywpU3cU/vGhOnJnQjyc9nvqLkHY6tG6MPSuR7R2VjnRqs8sdWIMp?= =?us-ascii?Q?aPmBrn7U+fpIx2tnI/uT3CRN41oaMkQuEK7FLJTE4DucK31WPXIfMdrsh8tp?= =?us-ascii?Q?posYsKqR+SiqfES1pbOQPp5vfb0FfAuByWS3bO+x96I1niDg6s0Bt//3Mghq?= =?us-ascii?Q?Qu2xog72d2g/DQLEOjGZ8XTqEjudHHOpUEYlcCbchK8da/ZakQ3o/tjHD5j6?= =?us-ascii?Q?Nno5SONvPNkp4o9uFwGKPdG3aDy+DAg8cjMPcbmTsRfLArHSjkPgKpOe5DYB?= =?us-ascii?Q?lQu+eLWG0AE/HMCyrOo8Ex1BUiIQTLueLBXG9EM/vVd2JTwEwcodKDrtePRC?= =?us-ascii?Q?A9TQySa75AzCUXBacu3KS1tNg6Fgnnhnvf5vNZSyUHF4HuqLaCbymSpLCG6k?= =?us-ascii?Q?LGce/b6E1IySSld/WyFVGlPpWKY13FlVyT5OEunaPyaNMYr8Dpnmu36LjVaN?= =?us-ascii?Q?198hXNgWhVsQvfA+wR7zxD4COe/5NYTWF+yoBnRWYAcmwnodRUn54Jrkn6OO?= =?us-ascii?Q?yILWKD9/VtXum7wX1j4YQ2mIXZyMZj8WLKe3f4MAzWjLns0wOrBhvLRYy7XI?= =?us-ascii?Q?K+/AWiHUJBguHYpBjZjshLU+NqbF/3BOV5gs?= 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)(82310400026)(36860700013)(1800799024)(7416014)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 May 2025 03:03:13.7961 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 13ead9c8-3874-4f63-e648-08dd8ea609ee 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: CO1PEPF000066EC.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB7495 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 Reviewed-by: Lu Baolu Acked-by: Pranjal Shrivastava Acked-by: Alok Tiwari Reviewed-by: Vasant Hegde 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