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Thu, 1 May 2025 16:01:40 -0700 From: Nicolin Chen To: , , , CC: , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v3 03/23] iommufd/viommu: Allow driver-specific user data for a vIOMMU object Date: Thu, 1 May 2025 16:01:09 -0700 Message-ID: <254637ea8929f57b9f89aa7aa1432671c5a554d4.1746139811.git.nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH1PEPF0000A348:EE_|MN0PR12MB5787:EE_ X-MS-Office365-Filtering-Correlation-Id: c1cdb203-47bd-444d-1d4b-08dd89042aac X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|1800799024|36860700013|82310400026|7416014|376014; X-Microsoft-Antispam-Message-Info: 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 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)(1800799024)(36860700013)(82310400026)(7416014)(376014); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 May 2025 23:01:54.3922 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c1cdb203-47bd-444d-1d4b-08dd89042aac 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: CH1PEPF0000A348.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB5787 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 Signed-off-by: Nicolin Chen Reviewed-by: Vasant Hegde --- 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;