iommufd/selftest: Test dirty tracking on PASID

Add test case for dirty tracking on a domain attached to PASID, also
confirm attachment to PASID fail if device doesn't support dirty tracking.

Suggested-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20260330101108.12594-5-zhenzhong.duan@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

Author: duanzhenzhong

tools/testing/selftests/iommu/iommufd.c

@@ -2275,6 +2275,33 @@ TEST_F(iommufd_dirty_tracking, set_dirty_tracking)
 	test_ioctl_destroy(hwpt_id);
 }
 
+TEST_F(iommufd_dirty_tracking, pasid_set_dirty_tracking)
+{
+	uint32_t stddev_id, ioas_id, hwpt_id, pasid = 100;
+	uint32_t dev_flags = MOCK_FLAGS_DEVICE_PASID;
+
+	/* Regular case */
+	test_cmd_hwpt_alloc(self->idev_id, self->ioas_id,
+			    IOMMU_HWPT_ALLOC_PASID | IOMMU_HWPT_ALLOC_DIRTY_TRACKING,
+			    &hwpt_id);
+	test_cmd_mock_domain_flags(hwpt_id, dev_flags, &stddev_id, NULL, NULL);
+	ASSERT_EQ(0, _test_cmd_pasid_attach(self->fd, stddev_id, pasid, hwpt_id));
+	test_cmd_set_dirty_tracking(hwpt_id, true);
+	test_cmd_set_dirty_tracking(hwpt_id, false);
+	ASSERT_EQ(0, _test_cmd_pasid_detach(self->fd, stddev_id, pasid));
+
+	test_ioctl_destroy(stddev_id);
+
+	/* IOMMU device does not support dirty tracking */
+	dev_flags |= MOCK_FLAGS_DEVICE_NO_DIRTY;
+	test_ioctl_ioas_alloc(&ioas_id);
+	test_cmd_mock_domain_flags(ioas_id, dev_flags, &stddev_id, NULL, NULL);
+	EXPECT_ERRNO(EINVAL, _test_cmd_pasid_attach(self->fd, stddev_id, pasid, hwpt_id));
+
+	test_ioctl_destroy(stddev_id);
+	test_ioctl_destroy(hwpt_id);
+}
+
 TEST_F(iommufd_dirty_tracking, device_dirty_capability)
 {
 	uint32_t caps = 0;