Commit 39a369c3 authored by Xu Yilun's avatar Xu Yilun Committed by Jason Gunthorpe
Browse files

iommufd/selftest: Add coverage for vdevice tombstone 

This tests the flow to tombstone vdevice when idevice is to be unbound
before vdevice destruction. The expected results of the tombstone are:

 - The vdevice ID can't be reused anymore (not tested in this patch).
 - Even ioctl(IOMMU_DESTROY) can't free the vdevice ID.
 - iommufd_fops_release() can still free everything.

Link: https://patch.msgid.link/r/20250716070349.1807226-8-yilun.xu@linux.intel.com


Reviewed-by: default avatarNicolin Chen <nicolinc@nvidia.com>
Tested-by: default avatarNicolin Chen <nicolinc@nvidia.com>
Signed-off-by: default avatarXu Yilun <yilun.xu@linux.intel.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
parent c4e496d4

tools/testing/selftests/iommu/iommufd.c

+14 −0
Original line number Diff line number Diff line
@@ -3142,6 +3142,20 @@ TEST_F(iommufd_viommu, hw_queue) 
	test_ioctl_ioas_unmap(iova, PAGE_SIZE);

}



TEST_F(iommufd_viommu, vdevice_tombstone)

{

	uint32_t viommu_id = self->viommu_id;

	uint32_t dev_id = self->device_id;

	uint32_t vdev_id = 0;



	if (!dev_id)

		SKIP(return, "Skipping test for variant no_viommu");



	test_cmd_vdevice_alloc(viommu_id, dev_id, 0x99, &vdev_id);

	test_ioctl_destroy(self->stdev_id);

	EXPECT_ERRNO(ENOENT, _test_ioctl_destroy(self->fd, vdev_id));

}



FIXTURE(iommufd_device_pasid)

{

	int fd;