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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Jun 2025 19:35:31.4146 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 0b9b4153-cac4-40f0-f358-08ddb4e89d01 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: MN1PEPF0000ECD8.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB9491 Content-Type: text/plain; charset="utf-8" Add a simple user_data for an input-to-output loopback test. Reviewed-by: Pranjal Shrivastava Reviewed-by: Kevin Tian Signed-off-by: Nicolin Chen --- drivers/iommu/iommufd/iommufd_test.h | 13 +++++++++++++ drivers/iommu/iommufd/selftest.c | 15 +++++++++++++++ 2 files changed, 28 insertions(+) diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/i= ommufd_test.h index 1cd7e8394129..fbf9ecb35a13 100644 --- a/drivers/iommu/iommufd/iommufd_test.h +++ b/drivers/iommu/iommufd/iommufd_test.h @@ -227,6 +227,19 @@ struct iommu_hwpt_invalidate_selftest { =20 #define IOMMU_VIOMMU_TYPE_SELFTEST 0xdeadbeef =20 +/** + * struct iommu_viommu_selftest - vIOMMU data for Mock driver + * (IOMMU_VIOMMU_TYPE_SELFTEST) + * @in_data: Input random data from user space + * @out_data: Output data (matching @in_data) to user space + * + * Simply set @out_data=3D@in_data for a loopback test + */ +struct iommu_viommu_selftest { + __u32 in_data; + __u32 out_data; +}; + /* Should not be equal to any defined value in enum iommu_viommu_invalidat= e_data_type */ #define IOMMU_VIOMMU_INVALIDATE_DATA_SELFTEST 0xdeadbeef #define IOMMU_VIOMMU_INVALIDATE_DATA_SELFTEST_INVALID 0xdadbeef diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selft= est.c index 0d896a89ace7..38066dfeb2e7 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -784,6 +784,21 @@ static int mock_viommu_init(struct iommufd_viommu *vio= mmu, { struct mock_iommu_device *mock_iommu =3D container_of( viommu->iommu_dev, struct mock_iommu_device, iommu_dev); + struct iommu_viommu_selftest data; + int rc; + + if (user_data) { + rc =3D iommu_copy_struct_from_user( + &data, user_data, IOMMU_VIOMMU_TYPE_SELFTEST, out_data); + if (rc) + return rc; + + data.out_data =3D data.in_data; + rc =3D iommu_copy_struct_to_user( + user_data, &data, IOMMU_VIOMMU_TYPE_SELFTEST, out_data); + if (rc) + return rc; + } =20 refcount_inc(&mock_iommu->users); viommu->ops =3D &mock_viommu_ops; --=20 2.43.0