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Message-Id: <20230309075358.571567-5-yi.l.liu@intel.com>
Date: Wed, 8 Mar 2023 23:53:58 -0800
From: Yi Liu <yi.l.liu@...el.com>
To: joro@...tes.org, alex.williamson@...hat.com, jgg@...dia.com,
kevin.tian@...el.com, robin.murphy@....com,
baolu.lu@...ux.intel.com
Cc: cohuck@...hat.com, eric.auger@...hat.com, nicolinc@...dia.com,
kvm@...r.kernel.org, mjrosato@...ux.ibm.com,
chao.p.peng@...ux.intel.com, yi.l.liu@...el.com,
yi.y.sun@...ux.intel.com, peterx@...hat.com, jasowang@...hat.com,
shameerali.kolothum.thodi@...wei.com, lulu@...hat.com,
suravee.suthikulpanit@....com, iommu@...ts.linux.dev,
linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: [PATCH v2 4/4] iommufd/selftest: Add coverage for IOMMU_DEVICE_GET_HW_INFO ioctl
From: Nicolin Chen <nicolinc@...dia.com>
Add a mock_domain_hw_info function and an iommu_hw_info_selftest data
structure. This allows to test the IOMMU_DEVICE_GET_HW_INFO ioctl by
passing the test_reg value for the mock_dev.
Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
Signed-off-by: Yi Liu <yi.l.liu@...el.com>
---
drivers/iommu/iommufd/device.c | 1 +
drivers/iommu/iommufd/iommufd_test.h | 15 +++++++++++
drivers/iommu/iommufd/selftest.c | 16 ++++++++++++
tools/testing/selftests/iommu/iommufd.c | 17 +++++++++++-
tools/testing/selftests/iommu/iommufd_utils.h | 26 +++++++++++++++++++
5 files changed, 74 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c
index 6948539488a5..5c352807d946 100644
--- a/drivers/iommu/iommufd/device.c
+++ b/drivers/iommu/iommufd/device.c
@@ -8,6 +8,7 @@
#include "io_pagetable.h"
#include "iommufd_private.h"
+#include "iommufd_test.h"
static bool allow_unsafe_interrupts;
module_param(allow_unsafe_interrupts, bool, S_IRUGO | S_IWUSR);
diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h
index da1898a9128f..578691602d94 100644
--- a/drivers/iommu/iommufd/iommufd_test.h
+++ b/drivers/iommu/iommufd/iommufd_test.h
@@ -100,4 +100,19 @@ 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_hw_info_selftest
+ *
+ * @flags: Must be set to 0
+ * @test_reg: Pass IOMMU_HW_INFO_SELFTEST_REGVAL to user selftest program
+ */
+struct iommu_hw_info_selftest {
+ __u32 flags;
+ __u32 test_reg;
+};
+
#endif
diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c
index d7832ffc3aa6..b50ec3528ec1 100644
--- a/drivers/iommu/iommufd/selftest.c
+++ b/drivers/iommu/iommufd/selftest.c
@@ -128,6 +128,20 @@ static struct iommu_domain mock_blocking_domain = {
.ops = &mock_blocking_ops,
};
+static void *mock_domain_hw_info(struct device *dev, u32 *length)
+{
+ struct iommu_hw_info_selftest *info;
+
+ info = kzalloc(sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return ERR_PTR(-ENOMEM);
+
+ info->test_reg = IOMMU_HW_INFO_SELFTEST_REGVAL;
+ *length = sizeof(*info);
+
+ return info;
+}
+
static struct iommu_domain *mock_domain_alloc(unsigned int iommu_domain_type)
{
struct mock_iommu_domain *mock;
@@ -279,6 +293,8 @@ 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,
+ .driver_type = IOMMU_HW_INFO_TYPE_SELFTEST,
+ .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,
diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c
index 5c33b6b52c65..d2ce2ddbdc40 100644
--- a/tools/testing/selftests/iommu/iommufd.c
+++ b/tools/testing/selftests/iommu/iommufd.c
@@ -124,6 +124,7 @@ TEST_F(iommufd, cmd_length)
TEST_LENGTH(iommu_ioas_unmap, IOMMU_IOAS_UNMAP);
TEST_LENGTH(iommu_option, IOMMU_OPTION);
TEST_LENGTH(iommu_vfio_ioas, IOMMU_VFIO_IOAS);
+ TEST_LENGTH(iommu_hw_info, IOMMU_DEVICE_GET_HW_INFO);
#undef TEST_LENGTH
}
@@ -188,6 +189,7 @@ FIXTURE(iommufd_ioas)
uint32_t ioas_id;
uint32_t stdev_id;
uint32_t hwpt_id;
+ uint32_t device_id;
uint64_t base_iova;
};
@@ -214,7 +216,7 @@ 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;
}
}
@@ -293,6 +295,19 @@ TEST_F(iommufd_ioas, ioas_area_auto_destroy)
}
}
+TEST_F(iommufd_ioas, device_get_hw_info)
+{
+ struct iommu_hw_info_selftest info;
+
+ if (self->device_id) {
+ test_cmd_device_get_hw_info(self->device_id, sizeof(info), &info);
+ assert(info.test_reg == IOMMU_HW_INFO_SELFTEST_REGVAL);
+ } else {
+ test_err_device_get_hw_info(ENOENT, self->device_id,
+ sizeof(info), &info);
+ }
+}
+
TEST_F(iommufd_ioas, area)
{
int i;
diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h
index 399779acce23..b57e1e60f69d 100644
--- a/tools/testing/selftests/iommu/iommufd_utils.h
+++ b/tools/testing/selftests/iommu/iommufd_utils.h
@@ -345,3 +345,29 @@ static void teardown_iommufd(int fd, struct __test_metadata *_metadata)
})
#endif
+
+static int _test_cmd_device_get_hw_info(int fd, __u32 device_id,
+ __u32 data_len, void *data)
+{
+ 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_DEVICE_GET_HW_INFO, &cmd);
+ if (ret)
+ return ret;
+ return 0;
+}
+
+#define test_cmd_device_get_hw_info(device_id, data_len, data) \
+ ASSERT_EQ(0, _test_cmd_device_get_hw_info(self->fd, device_id, \
+ data_len, data))
+
+#define test_err_device_get_hw_info(_errno, device_id, data_len, data) \
+ EXPECT_ERRNO(_errno, \
+ _test_cmd_device_get_hw_info(self->fd, device_id, \
+ data_len, data))
--
2.34.1
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