[v6,4/4] iommufd/selftest: Add coverage for IOMMU_GET_HW_INFO ioctl
Commit Message
From: Nicolin Chen <nicolinc@nvidia.com>
Add a mock_domain_hw_info function and an iommu_test_hw_info data
structure. This allows to test the IOMMU_GET_HW_INFO ioctl passing
the test_reg value for the mock_dev.
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
drivers/iommu/iommufd/iommufd_test.h | 9 +++++++
drivers/iommu/iommufd/selftest.c | 16 ++++++++++++
tools/testing/selftests/iommu/iommufd.c | 17 +++++++++++-
tools/testing/selftests/iommu/iommufd_utils.h | 26 +++++++++++++++++++
4 files changed, 67 insertions(+), 1 deletion(-)
Comments
On Tue, Aug 08, 2023 at 08:35:10AM -0700, Yi Liu wrote:
> From: Nicolin Chen <nicolinc@nvidia.com>
>
> Add a mock_domain_hw_info function and an iommu_test_hw_info data
> structure. This allows to test the IOMMU_GET_HW_INFO ioctl passing
> the test_reg value for the mock_dev.
>
> Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
> Signed-off-by: Yi Liu <yi.l.liu@intel.com>
> ---
> drivers/iommu/iommufd/iommufd_test.h | 9 +++++++
> drivers/iommu/iommufd/selftest.c | 16 ++++++++++++
> tools/testing/selftests/iommu/iommufd.c | 17 +++++++++++-
> tools/testing/selftests/iommu/iommufd_utils.h | 26 +++++++++++++++++++
> 4 files changed, 67 insertions(+), 1 deletion(-)
Don't forget to add it to fail_nth
Jason
> From: Jason Gunthorpe <jgg@nvidia.com>
> Sent: Thursday, August 10, 2023 12:46 AM
>
> On Tue, Aug 08, 2023 at 08:35:10AM -0700, Yi Liu wrote:
> > From: Nicolin Chen <nicolinc@nvidia.com>
> >
> > Add a mock_domain_hw_info function and an iommu_test_hw_info data
> > structure. This allows to test the IOMMU_GET_HW_INFO ioctl passing
> > the test_reg value for the mock_dev.
> >
> > Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
> > Signed-off-by: Yi Liu <yi.l.liu@intel.com>
> > ---
> > drivers/iommu/iommufd/iommufd_test.h | 9 +++++++
> > drivers/iommu/iommufd/selftest.c | 16 ++++++++++++
> > tools/testing/selftests/iommu/iommufd.c | 17 +++++++++++-
> > tools/testing/selftests/iommu/iommufd_utils.h | 26 +++++++++++++++++++
> > 4 files changed, 67 insertions(+), 1 deletion(-)
>
> Don't forget to add it to fail_nth
Sure. Btw. Would you share us the rule on determining whether an ioctl/path
requires fail_nth case or not.
Regards,
Yi Liu
On Fri, Aug 11, 2023 at 06:57:34AM +0000, Liu, Yi L wrote:
> > From: Jason Gunthorpe <jgg@nvidia.com>
> > Sent: Thursday, August 10, 2023 12:46 AM
> >
> > On Tue, Aug 08, 2023 at 08:35:10AM -0700, Yi Liu wrote:
> > > From: Nicolin Chen <nicolinc@nvidia.com>
> > >
> > > Add a mock_domain_hw_info function and an iommu_test_hw_info data
> > > structure. This allows to test the IOMMU_GET_HW_INFO ioctl passing
> > > the test_reg value for the mock_dev.
> > >
> > > Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
> > > Signed-off-by: Yi Liu <yi.l.liu@intel.com>
> > > ---
> > > drivers/iommu/iommufd/iommufd_test.h | 9 +++++++
> > > drivers/iommu/iommufd/selftest.c | 16 ++++++++++++
> > > tools/testing/selftests/iommu/iommufd.c | 17 +++++++++++-
> > > tools/testing/selftests/iommu/iommufd_utils.h | 26 +++++++++++++++++++
> > > 4 files changed, 67 insertions(+), 1 deletion(-)
> >
> > Don't forget to add it to fail_nth
>
> Sure. Btw. Would you share us the rule on determining whether an ioctl/path
> requires fail_nth case or not.
It always requires it :)
Jason
@@ -100,4 +100,13 @@ struct iommu_test_cmd {
};
#define IOMMU_TEST_CMD _IO(IOMMUFD_TYPE, IOMMUFD_CMD_BASE + 32)
+/* Mock structs for IOMMU_DEVICE_GET_HW_INFO ioctl */
+#define IOMMU_HW_INFO_TYPE_SELFTEST 0xfeedbeef
+#define IOMMU_HW_INFO_SELFTEST_REGVAL 0xdeadbeef
+
+struct iommu_test_hw_info {
+ __u32 flags;
+ __u32 test_reg;
+};
+
#endif
@@ -128,6 +128,21 @@ static struct iommu_domain mock_blocking_domain = {
.ops = &mock_blocking_ops,
};
+static void *mock_domain_hw_info(struct device *dev, u32 *length, u32 *type)
+{
+ struct iommu_test_hw_info *info;
+
+ info = kzalloc(sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return ERR_PTR(-ENOMEM);
+
+ info->test_reg = IOMMU_HW_INFO_SELFTEST_REGVAL;
+ *length = sizeof(*info);
+ *type = IOMMU_HW_INFO_TYPE_SELFTEST;
+
+ return info;
+}
+
static struct iommu_domain *mock_domain_alloc(unsigned int iommu_domain_type)
{
struct mock_iommu_domain *mock;
@@ -279,6 +294,7 @@ static void mock_domain_set_plaform_dma_ops(struct device *dev)
static const struct iommu_ops mock_ops = {
.owner = THIS_MODULE,
.pgsize_bitmap = MOCK_IO_PAGE_SIZE,
+ .hw_info = mock_domain_hw_info,
.domain_alloc = mock_domain_alloc,
.capable = mock_domain_capable,
.set_platform_dma_ops = mock_domain_set_plaform_dma_ops,
@@ -113,6 +113,7 @@ TEST_F(iommufd, cmd_length)
}
TEST_LENGTH(iommu_destroy, IOMMU_DESTROY);
+ TEST_LENGTH(iommu_hw_info, IOMMU_GET_HW_INFO);
TEST_LENGTH(iommu_ioas_alloc, IOMMU_IOAS_ALLOC);
TEST_LENGTH(iommu_ioas_iova_ranges, IOMMU_IOAS_IOVA_RANGES);
TEST_LENGTH(iommu_ioas_allow_iovas, IOMMU_IOAS_ALLOW_IOVAS);
@@ -185,6 +186,7 @@ FIXTURE(iommufd_ioas)
uint32_t ioas_id;
uint32_t stdev_id;
uint32_t hwpt_id;
+ uint32_t device_id;
uint64_t base_iova;
};
@@ -211,7 +213,7 @@ FIXTURE_SETUP(iommufd_ioas)
for (i = 0; i != variant->mock_domains; i++) {
test_cmd_mock_domain(self->ioas_id, &self->stdev_id,
- &self->hwpt_id, NULL);
+ &self->hwpt_id, &self->device_id);
self->base_iova = MOCK_APERTURE_START;
}
}
@@ -290,6 +292,19 @@ TEST_F(iommufd_ioas, ioas_area_auto_destroy)
}
}
+TEST_F(iommufd_ioas, get_hw_info)
+{
+ struct iommu_test_hw_info info;
+
+ if (self->device_id) {
+ test_cmd_get_hw_info(self->device_id, sizeof(info), &info);
+ assert(info.test_reg == IOMMU_HW_INFO_SELFTEST_REGVAL);
+ } else {
+ test_err_get_hw_info(ENOENT, self->device_id,
+ sizeof(info), &info);
+ }
+}
+
TEST_F(iommufd_ioas, area)
{
int i;
@@ -348,3 +348,29 @@ static void teardown_iommufd(int fd, struct __test_metadata *_metadata)
})
#endif
+
+static int _test_cmd_get_hw_info(int fd, __u32 device_id,
+ void *data, size_t data_len)
+{
+ struct iommu_hw_info cmd = {
+ .size = sizeof(cmd),
+ .dev_id = device_id,
+ .data_len = data_len,
+ .data_ptr = (uint64_t)data,
+ };
+ int ret;
+
+ ret = ioctl(fd, IOMMU_GET_HW_INFO, &cmd);
+ if (ret)
+ return ret;
+ return 0;
+}
+
+#define test_cmd_get_hw_info(device_id, data_len, data) \
+ ASSERT_EQ(0, _test_cmd_get_hw_info(self->fd, device_id, \
+ data, data_len))
+
+#define test_err_get_hw_info(_errno, device_id, data_len, data) \
+ EXPECT_ERRNO(_errno, \
+ _test_cmd_get_hw_info(self->fd, device_id, \
+ data, data_len))