[PATCH 11/12] iommufd/selftest: Add IOMMU_TEST_OP_MD_CHECK_IOTLB test op

Yi Liu
2023-03-09T08:12:45Z

From: Nicolin Chen <nicolinc@nvidia.com>

This allows to test whether IOTLB has been invalidated or not.

Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
drivers/iommu/iommufd/iommufd_test.h | 4 ++++
drivers/iommu/iommufd/selftest.c | 22 +++++++++++++++++++
tools/testing/selftests/iommu/iommufd.c | 4 ++++
tools/testing/selftests/iommu/iommufd_utils.h | 14 ++++++++++++
4 files changed, 44 insertions(+)

diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h
index 8bbb4f4fa1d7..4b60a6df0428 100644
--- a/drivers/iommu/iommufd/iommufd_test.h
+++ b/drivers/iommu/iommufd/iommufd_test.h
@@ -19,6 +19,7 @@ enum {
IOMMU_TEST_OP_SET_TEMP_MEMORY_LIMIT,
IOMMU_TEST_OP_MOCK_DOMAIN_REPLACE,
IOMMU_TEST_OP_ACCESS_SET_IOAS,
+ IOMMU_TEST_OP_MD_CHECK_IOTLB,
};

enum {
@@ -95,6 +96,9 @@ struct iommu_test_cmd {
struct {
__u32 ioas_id;
} access_set_ioas;
+ struct {
+ __u32 iotlb;
+ } check_iotlb;
};
__u32 last;
};
diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c
index b9c7f3bf64b5..a0d57f00f759 100644
--- a/drivers/iommu/iommufd/selftest.c
+++ b/drivers/iommu/iommufd/selftest.c
@@ -667,6 +667,25 @@ 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, u32 iotlb)
+{
+ struct iommufd_hw_pagetable *hwpt;
+ struct mock_iommu_domain *mock;
+ int rc = 0;
+
+ hwpt = get_md_pagetable(ucmd, mockpt_id, &mock);
+ if (IS_ERR(hwpt))
+ return PTR_ERR(hwpt);
+
+ mock = container_of(hwpt->domain, struct mock_iommu_domain, domain);
+
+ if (iotlb != mock->iotlb)
+ rc = -EINVAL;
+ iommufd_put_object(&hwpt->obj);
+ return rc;
+}
+
struct selftest_access {
struct iommufd_access *access;
struct file *file;
@@ -1077,6 +1096,9 @@ 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.iotlb);
case IOMMU_TEST_OP_CREATE_ACCESS:
return iommufd_test_create_access(ucmd,
cmd->create_access.flags);
diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c
index 783afd6ccd2e..10f1592dc9e7 100644
--- a/tools/testing/selftests/iommu/iommufd.c
+++ b/tools/testing/selftests/iommu/iommufd.c
@@ -313,6 +313,10 @@ TEST_F(iommufd_ioas, nested_hwpt_alloc)
&nested_hwpt_id[0]);
test_cmd_hwpt_alloc_nested(self->device_id, parent_hwpt_id,
&nested_hwpt_id[1]);
+ test_cmd_hwpt_check_iotlb(nested_hwpt_id[0],
+ IOMMU_TEST_IOTLB_DEFAULT);
+ test_cmd_hwpt_check_iotlb(nested_hwpt_id[1],
+ IOMMU_TEST_IOTLB_DEFAULT);

/* Negative test: a nested hwpt on top of a nested hwpt */
test_err_cmd_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 e0e484e1c775..211798190e5b 100644
--- a/tools/testing/selftests/iommu/iommufd_utils.h
+++ b/tools/testing/selftests/iommu/iommufd_utils.h
@@ -120,6 +120,20 @@ static int _test_cmd_hwpt_alloc(int fd, __u32 device_id, __u32 pt_id,
EXPECT_ERRNO(_errno, _test_cmd_hwpt_alloc(self->fd, device_id, \
pt_id, hwpt_id))

+#define test_cmd_hwpt_check_iotlb(hwpt_id, expected) \
+ ({ \
+ struct iommu_test_cmd test_cmd = { \
+ .size = sizeof(test_cmd), \
+ .op = IOMMU_TEST_OP_MD_CHECK_IOTLB, \
+ .id = hwpt_id, \
+ .check_iotlb = { .iotlb = expected }, \
+ }; \
+ ASSERT_EQ(0, \
+ ioctl(self->fd, \
+ _IOMMU_TEST_CMD(IOMMU_TEST_OP_MD_CHECK_IOTLB), \
+ &test_cmd)); \
+ })
+
static int _test_cmd_hwpt_alloc_nested(int fd, __u32 device_id, __u32 parent_id,
__u32 *hwpt_id)
{
--
2.34.1