[PATCH v8 05/10] iommufd/selftest: Add IOMMU_TEST_OP_MD_CHECK_IOTLB test op

Yi Liu
2023-12-27T16:14:05Z

From: Nicolin Chen <nicolinc@nvidia.com>

Allow to test whether IOTLB has been invalidated or not.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
drivers/iommu/iommufd/iommufd_test.h | 5 ++++
drivers/iommu/iommufd/selftest.c | 26 +++++++++++++++++++
tools/testing/selftests/iommu/iommufd.c | 4 +++
tools/testing/selftests/iommu/iommufd_utils.h | 24 +++++++++++++++++
4 files changed, 59 insertions(+)

diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h
index 2eef5afde711..1cedd6b5ba2b 100644
--- a/drivers/iommu/iommufd/iommufd_test.h
+++ b/drivers/iommu/iommufd/iommufd_test.h
@@ -21,6 +21,7 @@ enum {
IOMMU_TEST_OP_ACCESS_REPLACE_IOAS,
IOMMU_TEST_OP_MOCK_DOMAIN_FLAGS,
IOMMU_TEST_OP_DIRTY,
+ IOMMU_TEST_OP_MD_CHECK_IOTLB,
};

enum {
@@ -121,6 +122,10 @@ struct iommu_test_cmd {
__aligned_u64 uptr;
__aligned_u64 out_nr_dirty;
} dirty;
+ struct {
+ __u32 id;
+ __u32 iotlb;
+ } check_iotlb;
};
__u32 last;
};
diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c
index ebc6c15abf67..9528528cab27 100644
--- a/drivers/iommu/iommufd/selftest.c
+++ b/drivers/iommu/iommufd/selftest.c
@@ -853,6 +853,28 @@ static int iommufd_test_md_check_refs(struct iommufd_ucmd *ucmd,
return 0;
}

+static int iommufd_test_md_check_iotlb(struct iommufd_ucmd *ucmd,
+ u32 mockpt_id, unsigned int iotlb_id,
+ u32 iotlb)
+{
+ struct mock_iommu_domain_nested *mock_nested;
+ struct iommufd_hw_pagetable *hwpt;
+ int rc = 0;
+
+ hwpt = get_md_pagetable_nested(ucmd, mockpt_id, &mock_nested);
+ if (IS_ERR(hwpt))
+ return PTR_ERR(hwpt);
+
+ mock_nested = container_of(hwpt->domain,
+ struct mock_iommu_domain_nested, domain);
+
+ if (iotlb_id > MOCK_NESTED_DOMAIN_IOTLB_ID_MAX ||
+ mock_nested->iotlb[iotlb_id] != iotlb)
+ rc = -EINVAL;
+ iommufd_put_object(ucmd->ictx, &hwpt->obj);
+ return rc;
+}
+
struct selftest_access {
struct iommufd_access *access;
struct file *file;
@@ -1334,6 +1356,10 @@ int iommufd_test(struct iommufd_ucmd *ucmd)
return iommufd_test_md_check_refs(
ucmd, u64_to_user_ptr(cmd->check_refs.uptr),
cmd->check_refs.length, cmd->check_refs.refs);
+ case IOMMU_TEST_OP_MD_CHECK_IOTLB:
+ return iommufd_test_md_check_iotlb(ucmd, cmd->id,
+ cmd->check_iotlb.id,
+ cmd->check_iotlb.iotlb);
case IOMMU_TEST_OP_CREATE_ACCESS:
return iommufd_test_create_access(ucmd, cmd->id,
cmd->create_access.flags);
diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c
index 6ed328c863c4..c8763b880a16 100644
--- a/tools/testing/selftests/iommu/iommufd.c
+++ b/tools/testing/selftests/iommu/iommufd.c
@@ -330,6 +330,10 @@ TEST_F(iommufd_ioas, alloc_hwpt_nested)
&nested_hwpt_id[1],
IOMMU_HWPT_DATA_SELFTEST, &data,
sizeof(data));
+ test_cmd_hwpt_check_iotlb_all(nested_hwpt_id[0],
+ IOMMU_TEST_IOTLB_DEFAULT);
+ test_cmd_hwpt_check_iotlb_all(nested_hwpt_id[1],
+ IOMMU_TEST_IOTLB_DEFAULT);

/* Negative test: a nested hwpt on top of a nested hwpt */
test_err_hwpt_alloc_nested(EINVAL, self->device_id,
diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h
index ad9202335656..fe0a0f566b67 100644
--- a/tools/testing/selftests/iommu/iommufd_utils.h
+++ b/tools/testing/selftests/iommu/iommufd_utils.h
@@ -195,6 +195,30 @@ static int _test_cmd_hwpt_alloc(int fd, __u32 device_id, __u32 pt_id,
_test_cmd_hwpt_alloc(self->fd, device_id, pt_id, flags, \
hwpt_id, data_type, data, data_len))

+#define test_cmd_hwpt_check_iotlb(hwpt_id, iotlb_id, expected) \
+ ({ \
+ struct iommu_test_cmd test_cmd = { \
+ .size = sizeof(test_cmd), \
+ .op = IOMMU_TEST_OP_MD_CHECK_IOTLB, \
+ .id = hwpt_id, \
+ .check_iotlb = { \
+ .id = iotlb_id, \
+ .iotlb = expected, \
+ }, \
+ }; \
+ ASSERT_EQ(0, \
+ ioctl(self->fd, \
+ _IOMMU_TEST_CMD(IOMMU_TEST_OP_MD_CHECK_IOTLB), \
+ &test_cmd)); \
+ })
+
+#define test_cmd_hwpt_check_iotlb_all(hwpt_id, expected) \
+ ({ \
+ int i; \
+ for (i = 0; i < MOCK_NESTED_DOMAIN_IOTLB_NUM; i++) \
+ test_cmd_hwpt_check_iotlb(hwpt_id, i, expected); \
+ })
+
static int _test_cmd_access_replace_ioas(int fd, __u32 access_id,
unsigned int ioas_id)
{
--
2.34.1