From: Nicolin Chen nicolinc@nvidia.com
The IOMMU_HWPT_ALLOC ioctl now supports passing user_data to allocate a customized domain. Add its coverage for both a regular domain case and a nested domain case.
Signed-off-by: Nicolin Chen nicolinc@nvidia.com Signed-off-by: Yi Liu yi.l.liu@intel.com --- tools/testing/selftests/iommu/iommufd.c | 114 +++++++++++++++++- tools/testing/selftests/iommu/iommufd_utils.h | 36 ++++++ 2 files changed, 149 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c index fa2324741ad2..568f80f596ad 100644 --- a/tools/testing/selftests/iommu/iommufd.c +++ b/tools/testing/selftests/iommu/iommufd.c @@ -122,6 +122,7 @@ TEST_F(iommufd, cmd_length) TEST_LENGTH(iommu_option, IOMMU_OPTION); TEST_LENGTH(iommu_vfio_ioas, IOMMU_VFIO_IOAS); TEST_LENGTH(iommu_hw_info, IOMMU_DEVICE_GET_HW_INFO); + TEST_LENGTH(iommu_hwpt_alloc, IOMMU_HWPT_ALLOC); #undef TEST_LENGTH }
@@ -194,6 +195,7 @@ FIXTURE_VARIANT(iommufd_ioas) { unsigned int mock_domains; unsigned int memory_limit; + bool new_hwpt; };
FIXTURE_SETUP(iommufd_ioas) @@ -233,6 +235,12 @@ FIXTURE_VARIANT_ADD(iommufd_ioas, mock_domain) .mock_domains = 1, };
+FIXTURE_VARIANT_ADD(iommufd_ioas, mock_domain_hwpt) +{ + .mock_domains = 1, + .new_hwpt = true, +}; + FIXTURE_VARIANT_ADD(iommufd_ioas, two_mock_domain) { .mock_domains = 2, @@ -260,6 +268,93 @@ TEST_F(iommufd_ioas, ioas_destroy) } }
+TEST_F(iommufd_ioas, hwpt_alloc) +{ + uint32_t new_hwpt_id = 0; + + if (self->stdev_id && self->device_id) { + test_cmd_hwpt_alloc(self->device_id, self->ioas_id, &new_hwpt_id); + test_cmd_mock_domain_replace(self->stdev_id, new_hwpt_id); + /* hw_pagetable cannot be freed if a device is attached to it */ + EXPECT_ERRNO(EBUSY, _test_ioctl_destroy(self->fd, new_hwpt_id)); + + /* Detach from the new hw_pagetable and try again */ + test_cmd_mock_domain_replace(self->stdev_id, self->ioas_id); + test_ioctl_destroy(new_hwpt_id); + } else { + test_err_cmd_hwpt_alloc(ENOENT, self->device_id, + self->ioas_id, &new_hwpt_id); + test_err_mock_domain_replace(ENOENT, + self->stdev_id, new_hwpt_id); + } +} + +TEST_F(iommufd_ioas, nested_hwpt_alloc) +{ + uint32_t nested_hwpt_id[2] = {}; + uint32_t parent_hwpt_id = 0; + uint32_t test_hwpt_id = 0; + + if (self->device_id) { + /* Negative tests */ + test_err_cmd_hwpt_alloc(ENOENT, self->ioas_id, self->device_id, + &test_hwpt_id); + test_err_cmd_hwpt_alloc(EINVAL, self->device_id, + self->device_id, &test_hwpt_id); + + /* Allocate two nested hwpts sharing one common parent hwpt */ + test_cmd_hwpt_alloc(self->device_id, self->ioas_id, + &parent_hwpt_id); + + test_cmd_hwpt_alloc_nested(self->device_id, parent_hwpt_id, + &nested_hwpt_id[0]); + test_cmd_hwpt_alloc_nested(self->device_id, parent_hwpt_id, + &nested_hwpt_id[1]); + + /* Negative test: a nested hwpt on top of a nested hwpt */ + test_err_cmd_hwpt_alloc_nested(EINVAL, self->device_id, + nested_hwpt_id[0], + &test_hwpt_id); + /* Negative test: parent hwpt now cannot be freed */ + EXPECT_ERRNO(EBUSY, + _test_ioctl_destroy(self->fd, parent_hwpt_id)); + + /* 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, + _test_ioctl_destroy(self->fd, nested_hwpt_id[0])); + + /* Switch from nested_hwpt_id[0] to nested_hwpt_id[1] */ + test_cmd_mock_domain_replace(self->stdev_id, + nested_hwpt_id[1]); + EXPECT_ERRNO(EBUSY, + _test_ioctl_destroy(self->fd, nested_hwpt_id[1])); + test_ioctl_destroy(nested_hwpt_id[0]); + + /* Detach from nested_hwpt_id[1] and destroy it */ + test_cmd_mock_domain_replace(self->stdev_id, parent_hwpt_id); + test_ioctl_destroy(nested_hwpt_id[1]); + + /* Detach from the parent hw_pagetable and destroy it */ + test_cmd_mock_domain_replace(self->stdev_id, self->ioas_id); + test_ioctl_destroy(parent_hwpt_id); + } else { + test_err_cmd_hwpt_alloc(ENOENT, self->device_id, self->ioas_id, + &parent_hwpt_id); + test_err_cmd_hwpt_alloc_nested(ENOENT, self->device_id, + parent_hwpt_id, + &nested_hwpt_id[0]); + test_err_cmd_hwpt_alloc_nested(ENOENT, self->device_id, + parent_hwpt_id, + &nested_hwpt_id[1]); + test_err_mock_domain_replace(ENOENT, self->stdev_id, + nested_hwpt_id[0]); + test_err_mock_domain_replace(ENOENT, self->stdev_id, + nested_hwpt_id[1]); + } +} + TEST_F(iommufd_ioas, hwpt_attach) { /* Create a device attached directly to a hwpt */ @@ -663,6 +758,8 @@ TEST_F(iommufd_ioas, access_pin) MOCK_FLAGS_ACCESS_CREATE_NEEDS_PIN_PAGES);
for (npages = 1; npages < BUFFER_SIZE / PAGE_SIZE; npages++) { + uint32_t new_hwpt_id = 0; + uint32_t mock_device_id; uint32_t mock_stdev_id; uint32_t mock_hwpt_id;
@@ -696,12 +793,27 @@ TEST_F(iommufd_ioas, access_pin) _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES), &access_cmd)); test_cmd_mock_domain(self->ioas_id, &mock_stdev_id, - &mock_hwpt_id, NULL); + &mock_hwpt_id, &mock_device_id); check_map_cmd.id = mock_hwpt_id; + if (variant->new_hwpt) { + test_cmd_hwpt_alloc(mock_device_id, self->ioas_id, + &new_hwpt_id); + test_cmd_mock_domain_replace(mock_stdev_id, + new_hwpt_id); + check_map_cmd.id = new_hwpt_id; + } else { + check_map_cmd.id = mock_hwpt_id; + } ASSERT_EQ(0, ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_MD_CHECK_MAP), &check_map_cmd));
+ if (variant->new_hwpt) { + /* Detach from the new hwpt for its destroy() */ + test_cmd_mock_domain_replace(mock_stdev_id, + mock_hwpt_id); + test_ioctl_destroy(new_hwpt_id); + } test_ioctl_destroy(mock_stdev_id); test_cmd_destroy_access_pages( access_cmd.id, diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h index 8dced7ef9118..e2c26168ec89 100644 --- a/tools/testing/selftests/iommu/iommufd_utils.h +++ b/tools/testing/selftests/iommu/iommufd_utils.h @@ -118,6 +118,42 @@ static int _test_cmd_hwpt_alloc(int fd, __u32 device_id, __u32 pt_id,
#define test_cmd_hwpt_alloc(device_id, pt_id, hwpt_id) \ ASSERT_EQ(0, _test_cmd_hwpt_alloc(self->fd, device_id, pt_id, hwpt_id)) +#define test_err_cmd_hwpt_alloc(_errno, device_id, pt_id, hwpt_id) \ + EXPECT_ERRNO(_errno, _test_cmd_hwpt_alloc(self->fd, device_id, \ + pt_id, hwpt_id)) + +static int _test_cmd_hwpt_alloc_nested(int fd, __u32 device_id, __u32 parent_id, + __u32 *hwpt_id) +{ + struct iommu_hwpt_selftest data = { + .flags = IOMMU_TEST_FLAG_NESTED, + .test_config = IOMMU_TEST_IOTLB_DEFAULT, + }; + struct iommu_hwpt_alloc cmd = { + .size = sizeof(cmd), + .dev_id = device_id, + .pt_id = parent_id, + .hwpt_type = IOMMU_HWPT_TYPE_SELFTTEST, + .data_len = sizeof(data), + .data_uptr = (uint64_t)&data, + }; + int ret; + + ret = ioctl(fd, IOMMU_HWPT_ALLOC, &cmd); + if (ret) + return ret; + if (hwpt_id) + *hwpt_id = cmd.out_hwpt_id; + return 0; +} + +#define test_cmd_hwpt_alloc_nested(device_id, parent_id, hwpt_id) \ + ASSERT_EQ(0, _test_cmd_hwpt_alloc_nested(self->fd, device_id, \ + parent_id, hwpt_id)) +#define test_err_cmd_hwpt_alloc_nested(_errno, device_id, parent_id, hwpt_id) \ + EXPECT_ERRNO(_errno, \ + _test_cmd_hwpt_alloc_nested(self->fd, device_id, \ + parent_id, hwpt_id))
static int _test_cmd_access_replace_ioas(int fd, __u32 access_id, unsigned int ioas_id)