[PATCH v6 6/6] iommufd/selftest: Add coverage for IOMMU_HWPT_INVALIDATE ioctl

Yi Liu
2023-11-17T13:07:30Z

From: Nicolin Chen <nicolinc@nvidia.com>

Add test cases for the IOMMU_HWPT_INVALIDATE ioctl and verify it by using
the new IOMMU_TEST_OP_MD_CHECK_IOTLB.

Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
tools/testing/selftests/iommu/iommufd.c | 71 +++++++++++++++++++
tools/testing/selftests/iommu/iommufd_utils.h | 39 ++++++++++
2 files changed, 110 insertions(+)

diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c
index c8763b880a16..2781d5bc6309 100644
--- a/tools/testing/selftests/iommu/iommufd.c
+++ b/tools/testing/selftests/iommu/iommufd.c
@@ -116,6 +116,7 @@ TEST_F(iommufd, cmd_length)
TEST_LENGTH(iommu_destroy, IOMMU_DESTROY, id);
TEST_LENGTH(iommu_hw_info, IOMMU_GET_HW_INFO, __reserved);
TEST_LENGTH(iommu_hwpt_alloc, IOMMU_HWPT_ALLOC, __reserved);
+ TEST_LENGTH(iommu_hwpt_invalidate, IOMMU_HWPT_INVALIDATE, out_driver_error_code);
TEST_LENGTH(iommu_ioas_alloc, IOMMU_IOAS_ALLOC, out_ioas_id);
TEST_LENGTH(iommu_ioas_iova_ranges, IOMMU_IOAS_IOVA_RANGES,
out_iova_alignment);
@@ -271,7 +272,9 @@ TEST_F(iommufd_ioas, alloc_hwpt_nested)
struct iommu_hwpt_selftest data = {
.iotlb = IOMMU_TEST_IOTLB_DEFAULT,
};
+ struct iommu_hwpt_invalidate_selftest inv_reqs[2] = {0};
uint32_t nested_hwpt_id[2] = {};
+ uint32_t num_inv, driver_error;
uint32_t parent_hwpt_id = 0;
uint32_t parent_hwpt_id_not_work = 0;
uint32_t test_hwpt_id = 0;
@@ -344,6 +347,74 @@ TEST_F(iommufd_ioas, alloc_hwpt_nested)
EXPECT_ERRNO(EBUSY,
_test_ioctl_destroy(self->fd, parent_hwpt_id));

+ /* hwpt_invalidate only supports a user-managed hwpt (nested) */
+ num_inv = 1;
+ test_err_hwpt_invalidate(ENOENT, parent_hwpt_id, inv_reqs,
+ IOMMU_HWPT_DATA_SELFTEST,
+ sizeof(*inv_reqs), &num_inv, NULL);
+ /* Negative test: wrong data type */
+ num_inv = 1;
+ test_err_hwpt_invalidate(EINVAL, nested_hwpt_id[0], inv_reqs,
+ IOMMU_HWPT_DATA_NONE,
+ sizeof(*inv_reqs), &num_inv,
+ &driver_error);
+ /* Negative test: structure size sanity */
+ num_inv = 1;
+ test_err_hwpt_invalidate(EINVAL, nested_hwpt_id[0], inv_reqs,
+ IOMMU_HWPT_DATA_SELFTEST,
+ sizeof(*inv_reqs) + 1, &num_inv,
+ &driver_error);
+ assert(driver_error == IOMMU_TEST_INVALIDATE_ERR_FETCH);
+
+ num_inv = 1;
+ test_err_hwpt_invalidate(EINVAL, nested_hwpt_id[0], inv_reqs,
+ IOMMU_HWPT_DATA_SELFTEST,
+ 1, &num_inv, &driver_error);
+ assert(driver_error == IOMMU_TEST_INVALIDATE_ERR_FETCH);
+
+ /* Invalidate the 1st iotlb entry but fail the 2nd request */
+ num_inv = 2;
+ inv_reqs[0].iotlb_id = 0;
+ inv_reqs[1].iotlb_id = MOCK_NESTED_DOMAIN_IOTLB_ID_MAX + 1;
+ test_err_hwpt_invalidate(EINVAL, nested_hwpt_id[0], inv_reqs,
+ IOMMU_HWPT_DATA_SELFTEST,
+ sizeof(*inv_reqs), &num_inv,
+ &driver_error);
+ assert(num_inv == 1);
+ assert(driver_error == IOMMU_TEST_INVALIDATE_ERR_REQ);
+ test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 0, 0);
+ test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 1,
+ IOMMU_TEST_IOTLB_DEFAULT);
+ test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 2,
+ IOMMU_TEST_IOTLB_DEFAULT);
+ test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 3,
+ IOMMU_TEST_IOTLB_DEFAULT);
+
+ /* Invalidate the 2nd iotlb entry and verify */
+ num_inv = 1;
+ inv_reqs[0].iotlb_id = 1;
+ test_cmd_hwpt_invalidate(nested_hwpt_id[0], inv_reqs,
+ sizeof(*inv_reqs), &num_inv);
+ test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 0, 0);
+ test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 1, 0);
+ test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 2,
+ IOMMU_TEST_IOTLB_DEFAULT);
+ test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 3,
+ IOMMU_TEST_IOTLB_DEFAULT);
+ /* Invalidate the 3rd and 4th iotlb entries and verify */
+ num_inv = 2;
+ inv_reqs[0].iotlb_id = 2;
+ inv_reqs[1].iotlb_id = 3;
+ test_cmd_hwpt_invalidate(nested_hwpt_id[0], inv_reqs,
+ sizeof(*inv_reqs), &num_inv);
+ test_cmd_hwpt_check_iotlb_all(nested_hwpt_id[0], 0);
+ /* Invalidate all iotlb entries for nested_hwpt_id[1] and verify */
+ num_inv = 1;
+ inv_reqs[0].flags = IOMMU_TEST_INVALIDATE_ALL;
+ test_cmd_hwpt_invalidate(nested_hwpt_id[1], inv_reqs,
+ sizeof(*inv_reqs), &num_inv);
+ test_cmd_hwpt_check_iotlb_all(nested_hwpt_id[1], 0);
+
/* Attach device to nested_hwpt_id[0] that then will be busy */
test_cmd_mock_domain_replace(self->stdev_id, nested_hwpt_id[0]);
EXPECT_ERRNO(EBUSY,
diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h
index 69561ba9e7aa..d4a169a2278e 100644
--- a/tools/testing/selftests/iommu/iommufd_utils.h
+++ b/tools/testing/selftests/iommu/iommufd_utils.h
@@ -219,6 +219,45 @@ static int _test_cmd_hwpt_alloc(int fd, __u32 device_id, __u32 pt_id,
test_cmd_hwpt_check_iotlb(hwpt_id, i, expected); \
})

+static int _test_cmd_hwpt_invalidate(int fd, __u32 hwpt_id, void *reqs,
+ uint32_t req_type, uint32_t lreq,
+ uint32_t *nreqs, uint32_t *driver_error)
+{
+ struct iommu_hwpt_invalidate cmd = {
+ .size = sizeof(cmd),
+ .hwpt_id = hwpt_id,
+ .req_type = req_type,
+ .reqs_uptr = (uint64_t)reqs,
+ .req_len = lreq,
+ .req_num = *nreqs,
+ };
+ int rc = ioctl(fd, IOMMU_HWPT_INVALIDATE, &cmd);
+ *nreqs = cmd.req_num;
+ if (driver_error)
+ *driver_error = cmd.out_driver_error_code;
+ return rc;
+}
+
+#define test_cmd_hwpt_invalidate(hwpt_id, reqs, lreq, nreqs) \
+ ({ \
+ uint32_t error, num = *nreqs; \
+ ASSERT_EQ(0, \
+ _test_cmd_hwpt_invalidate(self->fd, hwpt_id, reqs, \
+ IOMMU_HWPT_DATA_SELFTEST, \
+ lreq, nreqs, &error)); \
+ assert(num == *nreqs); \
+ assert(error == 0); \
+ })
+#define test_err_hwpt_invalidate(_errno, hwpt_id, reqs, req_type, lreq, \
+ nreqs, driver_error) \
+ ({ \
+ EXPECT_ERRNO(_errno, \
+ _test_cmd_hwpt_invalidate(self->fd, hwpt_id, \
+ reqs, req_type, \
+ lreq, nreqs, \
+ driver_error)); \
+ })
+
static int _test_cmd_access_replace_ioas(int fd, __u32 access_id,
unsigned int ioas_id)
{
--
2.34.1