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
15 static const char iommu_dev_path[] = "/dev/iommu";
16 static const char *cdev_path;
17
vfio_device_bind_iommufd_ioctl(int cdev_fd,int iommufd)18 static 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
vfio_device_get_info_ioctl(int cdev_fd)28 static 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
vfio_device_ioas_alloc_ioctl(int iommufd,struct iommu_ioas_alloc * alloc_args)35 static 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
vfio_device_attach_iommufd_pt_ioctl(int cdev_fd,u32 pt_id)44 static 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
vfio_device_detach_iommufd_pt_ioctl(int cdev_fd)54 static 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
FIXTURE(vfio_cdev)63 FIXTURE(vfio_cdev) {
64 int cdev_fd;
65 int iommufd;
66 };
67
FIXTURE_SETUP(vfio_cdev)68 FIXTURE_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
FIXTURE_TEARDOWN(vfio_cdev)74 FIXTURE_TEARDOWN(vfio_cdev)
75 {
76 ASSERT_EQ(0, close(self->cdev_fd));
77 ASSERT_EQ(0, close(self->iommufd));
78 }
79
TEST_F(vfio_cdev,bind)80 TEST_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
TEST_F(vfio_cdev,get_info_without_bind_fails)86 TEST_F(vfio_cdev, get_info_without_bind_fails)
87 {
88 ASSERT_NE(0, vfio_device_get_info_ioctl(self->cdev_fd));
89 }
90
TEST_F(vfio_cdev,bind_bad_iommufd_fails)91 TEST_F(vfio_cdev, bind_bad_iommufd_fails)
92 {
93 ASSERT_NE(0, vfio_device_bind_iommufd_ioctl(self->cdev_fd, -2));
94 }
95
TEST_F(vfio_cdev,repeated_bind_fails)96 TEST_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
TEST_F(vfio_cdev,attach_detatch_pt)102 TEST_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
TEST_F(vfio_cdev,attach_invalid_pt_fails)112 TEST_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
main(int argc,char * argv[])118 int 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 }
127