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Sat, 17 May 2025 20:22:04 -0700 From: Nicolin Chen To: , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v5 06/29] iommufd/viommu: Allow driver-specific user data for a vIOMMU object Date: Sat, 17 May 2025 20:21:23 -0700 Message-ID: <7cd7c15416daf35f0b5a66e84166d68fa657cf5c.1747537752.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: DS1PEPF00017091:EE_|DM6PR12MB4481:EE_ X-MS-Office365-Filtering-Correlation-Id: f4b11e13-c826-442c-8ada-08dd95bb2fc3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|7416014|36860700013|376014|1800799024|82310400026|7053199007; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc6edge1.nvidia.com; CAT:NONE; SFS:(13230040)(7416014)(36860700013)(376014)(1800799024)(82310400026)(7053199007); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 May 2025 03:22:14.7602 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f4b11e13-c826-442c-8ada-08dd95bb2fc3 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.117.160]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DS1PEPF00017091.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4481 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 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 f29b6c44655e..272da7324a2b 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 b50b50ec87da..2b30627d1d8e 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, - cmd->type, NULL); + cmd->type, + user_data.len ? &user_data : NULL); if (IS_ERR(viommu)) { rc = PTR_ERR(viommu); goto out_put_hwpt;