On Fri, Apr 25, 2025 at 10:58:01PM -0700, Nicolin Chen wrote:
Add a simple user_data for an input-to-output loopback test.
Signed-off-by: Nicolin Chen nicolinc@nvidia.com
drivers/iommu/iommufd/iommufd_test.h | 13 +++++++++++++ drivers/iommu/iommufd/selftest.c | 19 +++++++++++++++++++ 2 files changed, 32 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 8b8ba4fb91cd..b04bd2fbc53d 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -740,16 +740,35 @@ mock_viommu_alloc(struct device *dev, struct iommu_domain *domain, { struct mock_iommu_device *mock_iommu = iommu_get_iommu_dev(dev, struct mock_iommu_device, iommu_dev);
- struct iommu_viommu_selftest data; struct mock_viommu *mock_viommu;
- int rc;
if (viommu_type != IOMMU_VIOMMU_TYPE_SELFTEST) return ERR_PTR(-EOPNOTSUPP);
- if (user_data) {
rc = iommu_copy_struct_from_user(&data, user_data, IOMMU_VIOMMU_TYPE_SELFTEST, out_data);if (rc)return ERR_PTR(rc);- }
- mock_viommu = iommufd_viommu_alloc(ictx, struct mock_viommu, core, &mock_viommu_ops); if (IS_ERR(mock_viommu)) return ERR_CAST(mock_viommu);
- if (user_data) {
data.out_data = data.in_data;rc = iommu_copy_struct_to_user(user_data, &data, IOMMU_VIOMMU_TYPE_SELFTEST, out_data);if (rc) {iommufd_struct_destroy(ictx, mock_viommu, core);return ERR_PTR(rc);}- }
- refcount_inc(&mock_iommu->users); return &mock_viommu->core;
}
Builds fine for me.
Reviewed-by: Pranjal Shrivastava praan@google.com
-- 2.43.0