vfio_iommufd_setup_test.c

  1// SPDX-License-Identifier: GPL-2.0
  2#include <linux/limits.h>
  3#include <linux/sizes.h>
  4#include <linux/vfio.h>
  5#include <linux/iommufd.h>
  6
  7#include <stdint.h>
  8#include <stdio.h>
  9#include <sys/ioctl.h>
 10#include <unistd.h>
 11
 12#include <libvfio.h>
 13#include "kselftest_harness.h"
 14
 15static const char iommu_dev_path[] = "/dev/iommu";
 16static const char *cdev_path;
 17
 18static int vfio_device_bind_iommufd_ioctl(int cdev_fd, int iommufd)
 19{
 20	struct vfio_device_bind_iommufd bind_args = {
 21		.argsz = sizeof(bind_args),
 22		.iommufd = iommufd,
 23	};
 24
 25	return ioctl(cdev_fd, VFIO_DEVICE_BIND_IOMMUFD, &bind_args);
 26}
 27
 28static int vfio_device_get_info_ioctl(int cdev_fd)
 29{
 30	struct vfio_device_info info_args = { .argsz = sizeof(info_args) };
 31
 32	return ioctl(cdev_fd, VFIO_DEVICE_GET_INFO, &info_args);
 33}
 34
 35static int vfio_device_ioas_alloc_ioctl(int iommufd, struct iommu_ioas_alloc *alloc_args)
 36{
 37	*alloc_args = (struct iommu_ioas_alloc){
 38		.size = sizeof(struct iommu_ioas_alloc),
 39	};
 40
 41	return ioctl(iommufd, IOMMU_IOAS_ALLOC, alloc_args);
 42}
 43
 44static int vfio_device_attach_iommufd_pt_ioctl(int cdev_fd, u32 pt_id)
 45{
 46	struct vfio_device_attach_iommufd_pt attach_args = {
 47		.argsz = sizeof(attach_args),
 48		.pt_id = pt_id,
 49	};
 50
 51	return ioctl(cdev_fd, VFIO_DEVICE_ATTACH_IOMMUFD_PT, &attach_args);
 52}
 53
 54static int vfio_device_detach_iommufd_pt_ioctl(int cdev_fd)
 55{
 56	struct vfio_device_detach_iommufd_pt detach_args = {
 57		.argsz = sizeof(detach_args),
 58	};
 59
 60	return ioctl(cdev_fd, VFIO_DEVICE_DETACH_IOMMUFD_PT, &detach_args);
 61}
 62
 63FIXTURE(vfio_cdev) {
 64	int cdev_fd;
 65	int iommufd;
 66};
 67
 68FIXTURE_SETUP(vfio_cdev)
 69{
 70	ASSERT_LE(0, (self->cdev_fd = open(cdev_path, O_RDWR, 0)));
 71	ASSERT_LE(0, (self->iommufd = open(iommu_dev_path, O_RDWR, 0)));
 72}
 73
 74FIXTURE_TEARDOWN(vfio_cdev)
 75{
 76	ASSERT_EQ(0, close(self->cdev_fd));
 77	ASSERT_EQ(0, close(self->iommufd));
 78}
 79
 80TEST_F(vfio_cdev, bind)
 81{
 82	ASSERT_EQ(0, vfio_device_bind_iommufd_ioctl(self->cdev_fd, self->iommufd));
 83	ASSERT_EQ(0, vfio_device_get_info_ioctl(self->cdev_fd));
 84}
 85
 86TEST_F(vfio_cdev, get_info_without_bind_fails)
 87{
 88	ASSERT_NE(0, vfio_device_get_info_ioctl(self->cdev_fd));
 89}
 90
 91TEST_F(vfio_cdev, bind_bad_iommufd_fails)
 92{
 93	ASSERT_NE(0, vfio_device_bind_iommufd_ioctl(self->cdev_fd, -2));
 94}
 95
 96TEST_F(vfio_cdev, repeated_bind_fails)
 97{
 98	ASSERT_EQ(0, vfio_device_bind_iommufd_ioctl(self->cdev_fd, self->iommufd));
 99	ASSERT_NE(0, vfio_device_bind_iommufd_ioctl(self->cdev_fd, self->iommufd));
100}
101
102TEST_F(vfio_cdev, attach_detatch_pt)
103{
104	struct iommu_ioas_alloc alloc_args;
105
106	ASSERT_EQ(0, vfio_device_bind_iommufd_ioctl(self->cdev_fd, self->iommufd));
107	ASSERT_EQ(0, vfio_device_ioas_alloc_ioctl(self->iommufd, &alloc_args));
108	ASSERT_EQ(0, vfio_device_attach_iommufd_pt_ioctl(self->cdev_fd, alloc_args.out_ioas_id));
109	ASSERT_EQ(0, vfio_device_detach_iommufd_pt_ioctl(self->cdev_fd));
110}
111
112TEST_F(vfio_cdev, attach_invalid_pt_fails)
113{
114	ASSERT_EQ(0, vfio_device_bind_iommufd_ioctl(self->cdev_fd, self->iommufd));
115	ASSERT_NE(0, vfio_device_attach_iommufd_pt_ioctl(self->cdev_fd, UINT32_MAX));
116}
117
118int main(int argc, char *argv[])
119{
120	const char *device_bdf = vfio_selftests_get_bdf(&argc, argv);
121
122	cdev_path = vfio_pci_get_cdev_path(device_bdf);
123	printf("Using cdev device %s\n", cdev_path);
124
125	return test_harness_run(argc, argv);
126}