Re: [PATCH v6 12/13] iommufd/selftest: Add IOMMU_VIOMMU_ALLOC test coverage

On Wed, Oct 30, 2024 at 02:34:38PM -0700, Nicolin Chen wrote:

+FIXTURE_SETUP(iommufd_viommu) +{

• self->fd = open("/dev/iommu", O_RDWR);
• ASSERT_NE(-1, self->fd);
• test_ioctl_ioas_alloc(&self->ioas_id);
• test_ioctl_set_default_memory_limit();
• if (variant->viommu) {

• struct iommu_hwpt_selftest data = {
  

• 	.iotlb = IOMMU_TEST_IOTLB_DEFAULT,
  

• };
  

• test_cmd_mock_domain(self->ioas_id, &self->stdev_id, NULL,
  

• 		     &self->device_id);
  

• /* Negative test -- invalid hwpt */
  

• test_err_viommu_alloc(ENOENT, self->device_id, self->hwpt_id,
  

• 		      IOMMU_VIOMMU_TYPE_SELFTEST, NULL);
  

• /* Negative test -- not a nesting parent hwpt */
  

• test_cmd_hwpt_alloc(self->device_id, self->ioas_id, 0,
  

• 		    &self->hwpt_id);
  

• test_err_viommu_alloc(EINVAL, self->device_id, self->hwpt_id,
  

• 		      IOMMU_VIOMMU_TYPE_SELFTEST, NULL);
  

• test_ioctl_destroy(self->hwpt_id);
  

• /* Allocate a nesting parent hwpt */
  

• test_cmd_hwpt_alloc(self->device_id, self->ioas_id,
  

• 		    IOMMU_HWPT_ALLOC_NEST_PARENT,
  

• 		    &self->hwpt_id);
  

• /* Negative test -- unsupported viommu type */
  

• test_err_viommu_alloc(EOPNOTSUPP, self->device_id,
  

• 		      self->hwpt_id, 0xdead, NULL);
  

• /* Allocate a vIOMMU taking refcount of the parent hwpt */
  

• test_cmd_viommu_alloc(self->device_id, self->hwpt_id,
  

• 		      IOMMU_VIOMMU_TYPE_SELFTEST,
  

• 		      &self->viommu_id);
  

• EXPECT_ERRNO(EBUSY,
  

• 	     _test_ioctl_destroy(self->fd, self->hwpt_id));
  

There shouldn't be testing in the FIXTURE_SETUP, it should just do enough to setup the fixture. negative tests/etc should be in their own function

Jason