tools/testing/selftests/vfio/vfio_iommufd_setup_test.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/vfio/vfio_iommufd_setup_test.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/vfio/vfio_iommufd_setup_test.c
Extension
.c
Size
3227 bytes
Lines
127
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
#include <linux/limits.h>
#include <linux/sizes.h>
#include <linux/vfio.h>
#include <linux/iommufd.h>

#include <stdint.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <unistd.h>

#include <libvfio.h>
#include "kselftest_harness.h"

static const char iommu_dev_path[] = "/dev/iommu";
static const char *cdev_path;

static int vfio_device_bind_iommufd_ioctl(int cdev_fd, int iommufd)
{
	struct vfio_device_bind_iommufd bind_args = {
		.argsz = sizeof(bind_args),
		.iommufd = iommufd,
	};

	return ioctl(cdev_fd, VFIO_DEVICE_BIND_IOMMUFD, &bind_args);
}

static int vfio_device_get_info_ioctl(int cdev_fd)
{
	struct vfio_device_info info_args = { .argsz = sizeof(info_args) };

	return ioctl(cdev_fd, VFIO_DEVICE_GET_INFO, &info_args);
}

static int vfio_device_ioas_alloc_ioctl(int iommufd, struct iommu_ioas_alloc *alloc_args)
{
	*alloc_args = (struct iommu_ioas_alloc){
		.size = sizeof(struct iommu_ioas_alloc),
	};

	return ioctl(iommufd, IOMMU_IOAS_ALLOC, alloc_args);
}

static int vfio_device_attach_iommufd_pt_ioctl(int cdev_fd, u32 pt_id)
{
	struct vfio_device_attach_iommufd_pt attach_args = {
		.argsz = sizeof(attach_args),
		.pt_id = pt_id,
	};

	return ioctl(cdev_fd, VFIO_DEVICE_ATTACH_IOMMUFD_PT, &attach_args);
}

static int vfio_device_detach_iommufd_pt_ioctl(int cdev_fd)
{
	struct vfio_device_detach_iommufd_pt detach_args = {
		.argsz = sizeof(detach_args),
	};

	return ioctl(cdev_fd, VFIO_DEVICE_DETACH_IOMMUFD_PT, &detach_args);
}

FIXTURE(vfio_cdev) {
	int cdev_fd;
	int iommufd;
};

FIXTURE_SETUP(vfio_cdev)
{
	ASSERT_LE(0, (self->cdev_fd = open(cdev_path, O_RDWR, 0)));
	ASSERT_LE(0, (self->iommufd = open(iommu_dev_path, O_RDWR, 0)));
}

FIXTURE_TEARDOWN(vfio_cdev)
{
	ASSERT_EQ(0, close(self->cdev_fd));
	ASSERT_EQ(0, close(self->iommufd));
}

TEST_F(vfio_cdev, bind)
{
	ASSERT_EQ(0, vfio_device_bind_iommufd_ioctl(self->cdev_fd, self->iommufd));
	ASSERT_EQ(0, vfio_device_get_info_ioctl(self->cdev_fd));
}

TEST_F(vfio_cdev, get_info_without_bind_fails)
{
	ASSERT_NE(0, vfio_device_get_info_ioctl(self->cdev_fd));
}

Annotation

Implementation Notes