[PATCH v5 10/14] iommufd/selftest: Add IOMMU_TEST_OP_TRIGGER_VEVENT for vEVENTQ coverage

Nicolin Chen
2025-01-07T17:11:20Z

The handler will get vDEVICE object from the given mdev and convert it to
its per-vIOMMU virtual ID to mimic a real IOMMU driver.

Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
---
drivers/iommu/iommufd/iommufd_test.h | 10 ++++++++++
drivers/iommu/iommufd/selftest.c | 30 ++++++++++++++++++++++++++++
2 files changed, 40 insertions(+)

diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h
index a6b7a163f636..87e9165cea27 100644
--- a/drivers/iommu/iommufd/iommufd_test.h
+++ b/drivers/iommu/iommufd/iommufd_test.h
@@ -24,6 +24,7 @@ enum {
IOMMU_TEST_OP_MD_CHECK_IOTLB,
IOMMU_TEST_OP_TRIGGER_IOPF,
IOMMU_TEST_OP_DEV_CHECK_CACHE,
+ IOMMU_TEST_OP_TRIGGER_VEVENT,
};

enum {
@@ -145,6 +146,9 @@ struct iommu_test_cmd {
__u32 id;
__u32 cache;
} check_dev_cache;
+ struct {
+ __u32 dev_id;
+ } trigger_vevent;
};
__u32 last;
};
@@ -212,4 +216,10 @@ struct iommu_viommu_invalidate_selftest {
__u32 cache_id;
};

+#define IOMMU_VEVENTQ_TYPE_SELFTEST 0xbeefbeef
+
+struct iommu_viommu_event_selftest {
+ __u32 virt_id;
+};
+
#endif
diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c
index d1438d81e664..7c20a85ed142 100644
--- a/drivers/iommu/iommufd/selftest.c
+++ b/drivers/iommu/iommufd/selftest.c
@@ -1631,6 +1631,34 @@ static int iommufd_test_trigger_iopf(struct iommufd_ucmd *ucmd,
return 0;
}

+static int iommufd_test_trigger_vevent(struct iommufd_ucmd *ucmd,
+ struct iommu_test_cmd *cmd)
+{
+ struct iommu_viommu_event_selftest test = {};
+ struct iommufd_device *idev;
+ struct mock_dev *mdev;
+ int rc = -ENOENT;
+
+ idev = iommufd_get_device(ucmd, cmd->trigger_vevent.dev_id);
+ if (IS_ERR(idev))
+ return PTR_ERR(idev);
+ mdev = to_mock_dev(idev->dev);
+
+ down_read(&mdev->viommu_rwsem);
+ if (!mdev->viommu || !mdev->vdev_id)
+ goto out_unlock;
+
+ test.virt_id = mdev->vdev_id;
+ rc = iommufd_viommu_report_event(&mdev->viommu->core,
+ IOMMU_VEVENTQ_TYPE_SELFTEST, &test,
+ sizeof(test));
+out_unlock:
+ up_read(&mdev->viommu_rwsem);
+ iommufd_put_object(ucmd->ictx, &idev->obj);
+
+ return rc;
+}
+
void iommufd_selftest_destroy(struct iommufd_object *obj)
{
struct selftest_obj *sobj = to_selftest_obj(obj);
@@ -1712,6 +1740,8 @@ int iommufd_test(struct iommufd_ucmd *ucmd)
cmd->dirty.flags);
case IOMMU_TEST_OP_TRIGGER_IOPF:
return iommufd_test_trigger_iopf(ucmd, cmd);
+ case IOMMU_TEST_OP_TRIGGER_VEVENT:
+ return iommufd_test_trigger_vevent(ucmd, cmd);
default:
return -EOPNOTSUPP;
}
--
2.43.0