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Thu, 10 Apr 2025 23:38:07 -0700 From: Nicolin Chen To: , , , CC: , , , , , , , , , , , , , , , , , , , Subject: [PATCH v1 02/16] iommufd/viommu: Allow driver-specific user data for a vIOMMU object Date: Thu, 10 Apr 2025 23:37:41 -0700 Message-ID: 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: SJ5PEPF000001F0:EE_|SN7PR12MB8602:EE_ X-MS-Office365-Filtering-Correlation-Id: 0c59669f-ecaa-4650-7e8e-08dd78c37355 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|82310400026|376014|7416014|1800799024|36860700013; X-Microsoft-Antispam-Message-Info: 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 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)(82310400026)(376014)(7416014)(1800799024)(36860700013); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Apr 2025 06:38:20.5104 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 0c59669f-ecaa-4650-7e8e-08dd78c37355 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: SJ5PEPF000001F0.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB8602 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. 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 b861ca49d723..3d4d325adeaa 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;