linux-kernel - [PATCH v2 05/19] iommufd/selftest: Add IOMMU_VIOMMU

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Message-ID: <c2bbc7e85ed5eb2e88d6c87acd9c679b00641ab2.1724776335.git.nicolinc@nvidia.com>
Date: Tue, 27 Aug 2024 09:59:42 -0700
From: Nicolin Chen <nicolinc@...dia.com>
To: <jgg@...dia.com>, <kevin.tian@...el.com>, <will@...nel.org>
CC: <joro@...tes.org>, <suravee.suthikulpanit@....com>,
	<robin.murphy@....com>, <dwmw2@...radead.org>, <baolu.lu@...ux.intel.com>,
	<shuah@...nel.org>, <linux-kernel@...r.kernel.org>, <iommu@...ts.linux.dev>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kselftest@...r.kernel.org>,
	<eric.auger@...hat.com>, <jean-philippe@...aro.org>, <mdf@...nel.org>,
	<mshavit@...gle.com>, <shameerali.kolothum.thodi@...wei.com>,
	<smostafa@...gle.com>, <yi.l.liu@...el.com>
Subject: [PATCH v2 05/19] iommufd/selftest: Add IOMMU_VIOMMU_ALLOC test coverage

Use IOMMU_VIOMMU_TYPE_DEFAULT to cover the new IOMMU_VIOMMU_ALLOC ioctl.

Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
---
 tools/testing/selftests/iommu/iommufd.c       | 35 +++++++++++++++++++
 tools/testing/selftests/iommu/iommufd_utils.h | 28 +++++++++++++++
 2 files changed, 63 insertions(+)

diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c
index 6343f4053bd4..5c770e94f299 100644
--- a/tools/testing/selftests/iommu/iommufd.c
+++ b/tools/testing/selftests/iommu/iommufd.c
@@ -554,6 +554,41 @@ TEST_F(iommufd_ioas, alloc_hwpt_nested)
 	}
 }
 
+TEST_F(iommufd_ioas, viommu_default)
+{
+	uint32_t dev_id = self->device_id;
+	uint32_t viommu_id = 0;
+	uint32_t hwpt_id = 0;
+
+	if (dev_id) {
+		/* Negative test -- invalid hwpt */
+		test_err_viommu_alloc(ENOENT, dev_id, hwpt_id,
+				      IOMMU_VIOMMU_TYPE_DEFAULT, &viommu_id);
+
+		/* Negative test -- not a nested parent hwpt */
+		test_cmd_hwpt_alloc(dev_id, self->ioas_id, 0, &hwpt_id);
+		test_err_viommu_alloc(EINVAL, dev_id, hwpt_id,
+				      IOMMU_VIOMMU_TYPE_DEFAULT, &viommu_id);
+		test_ioctl_destroy(hwpt_id);
+
+		/* Allocate a nested parent HWP */
+		test_cmd_hwpt_alloc(dev_id, self->ioas_id,
+				    IOMMU_HWPT_ALLOC_NEST_PARENT,
+				    &hwpt_id);
+		/* Negative test -- unsupported viommu type */
+		test_err_viommu_alloc(EOPNOTSUPP, dev_id, hwpt_id,
+				      0xdead, &viommu_id);
+		/* Allocate a default type of viommu */
+		test_cmd_viommu_alloc(dev_id, hwpt_id,
+				      IOMMU_VIOMMU_TYPE_DEFAULT, &viommu_id);
+		test_ioctl_destroy(viommu_id);
+		test_ioctl_destroy(hwpt_id);
+	} else {
+		test_err_viommu_alloc(ENOENT, dev_id, hwpt_id,
+				      IOMMU_VIOMMU_TYPE_DEFAULT, &viommu_id);
+	}
+}
+
 TEST_F(iommufd_ioas, hwpt_attach)
 {
 	/* Create a device attached directly to a hwpt */
diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h
index 40f6f14ce136..307d097db9dd 100644
--- a/tools/testing/selftests/iommu/iommufd_utils.h
+++ b/tools/testing/selftests/iommu/iommufd_utils.h
@@ -762,3 +762,31 @@ static int _test_cmd_trigger_iopf(int fd, __u32 device_id, __u32 fault_fd)
 
 #define test_cmd_trigger_iopf(device_id, fault_fd) \
 	ASSERT_EQ(0, _test_cmd_trigger_iopf(self->fd, device_id, fault_fd))
+
+static int _test_cmd_viommu_alloc(int fd, __u32 device_id, __u32 hwpt_id,
+				  __u32 type, __u32 flags, __u32 *viommu_id)
+{
+	struct iommu_viommu_alloc cmd = {
+		.size = sizeof(cmd),
+		.flags = flags,
+		.type = type,
+		.dev_id = device_id,
+		.hwpt_id = hwpt_id,
+	};
+	int ret;
+
+	ret = ioctl(fd, IOMMU_VIOMMU_ALLOC, &cmd);
+	if (ret)
+		return ret;
+	if (viommu_id)
+		*viommu_id = cmd.out_viommu_id;
+	return 0;
+}
+
+#define test_cmd_viommu_alloc(device_id, hwpt_id, type, viommu_id)        \
+	ASSERT_EQ(0, _test_cmd_viommu_alloc(self->fd, device_id, hwpt_id, \
+					    type, 0, viommu_id))
+#define test_err_viommu_alloc(_errno, device_id, hwpt_id, type, viommu_id) \
+	EXPECT_ERRNO(_errno, _test_cmd_viommu_alloc(self->fd, device_id,   \
+						    hwpt_id, type, 0,      \
+						    viommu_id))
-- 
2.43.0