Add a simple user_data for an input-to-output loopback test.
Reviewed-by: Pranjal Shrivastava praan@google.com Reviewed-by: Kevin Tian kevin.tian@intel.com Signed-off-by: Nicolin Chen nicolinc@nvidia.com --- 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/iommufd_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 {
#define IOMMU_VIOMMU_TYPE_SELFTEST 0xdeadbeef
+/** + * 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=@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_invalidate_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/selftest.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 *viommu, { struct mock_iommu_device *mock_iommu = container_of( viommu->iommu_dev, struct mock_iommu_device, iommu_dev); + struct iommu_viommu_selftest data; + int rc; + + if (user_data) { + rc = iommu_copy_struct_from_user( + &data, user_data, IOMMU_VIOMMU_TYPE_SELFTEST, out_data); + if (rc) + return rc; + + data.out_data = data.in_data; + rc = iommu_copy_struct_to_user( + user_data, &data, IOMMU_VIOMMU_TYPE_SELFTEST, out_data); + if (rc) + return rc; + }
refcount_inc(&mock_iommu->users); viommu->ops = &mock_viommu_ops;