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1#define _GNU_SOURCE
2#include <getopt.h>
3#include <string.h>
4#include <poll.h>
5#include <sys/eventfd.h>
6#include <stdlib.h>
7#include <assert.h>
8#include <unistd.h>
9#include <sys/ioctl.h>
10#include <sys/stat.h>
11#include <sys/types.h>
12#include <fcntl.h>
13#include <stdbool.h>
14#include <linux/virtio_types.h>
15#include <linux/vhost.h>
16#include <linux/virtio.h>
17#include <linux/virtio_ring.h>
18#include "../../drivers/vhost/test.h"
19
20/* Unused */
21void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end;
22
23struct vq_info {
24 int kick;
25 int call;
26 int num;
27 int idx;
28 void *ring;
29 /* copy used for control */
30 struct vring vring;
31 struct virtqueue *vq;
32};
33
34struct vdev_info {
35 struct virtio_device vdev;
36 int control;
37 struct pollfd fds[1];
38 struct vq_info vqs[1];
39 int nvqs;
40 void *buf;
41 size_t buf_size;
42 struct vhost_memory *mem;
43};
44
45bool vq_notify(struct virtqueue *vq)
46{
47 struct vq_info *info = vq->priv;
48 unsigned long long v = 1;
49 int r;
50 r = write(info->kick, &v, sizeof v);
51 assert(r == sizeof v);
52 return true;
53}
54
55void vq_callback(struct virtqueue *vq)
56{
57}
58
59
60void vhost_vq_setup(struct vdev_info *dev, struct vq_info *info)
61{
62 struct vhost_vring_state state = { .index = info->idx };
63 struct vhost_vring_file file = { .index = info->idx };
64 unsigned long long features = dev->vdev.features;
65 struct vhost_vring_addr addr = {
66 .index = info->idx,
67 .desc_user_addr = (uint64_t)(unsigned long)info->vring.desc,
68 .avail_user_addr = (uint64_t)(unsigned long)info->vring.avail,
69 .used_user_addr = (uint64_t)(unsigned long)info->vring.used,
70 };
71 int r;
72 r = ioctl(dev->control, VHOST_SET_FEATURES, &features);
73 assert(r >= 0);
74 state.num = info->vring.num;
75 r = ioctl(dev->control, VHOST_SET_VRING_NUM, &state);
76 assert(r >= 0);
77 state.num = 0;
78 r = ioctl(dev->control, VHOST_SET_VRING_BASE, &state);
79 assert(r >= 0);
80 r = ioctl(dev->control, VHOST_SET_VRING_ADDR, &addr);
81 assert(r >= 0);
82 file.fd = info->kick;
83 r = ioctl(dev->control, VHOST_SET_VRING_KICK, &file);
84 assert(r >= 0);
85 file.fd = info->call;
86 r = ioctl(dev->control, VHOST_SET_VRING_CALL, &file);
87 assert(r >= 0);
88}
89
90static void vq_info_add(struct vdev_info *dev, int num)
91{
92 struct vq_info *info = &dev->vqs[dev->nvqs];
93 int r;
94 info->idx = dev->nvqs;
95 info->kick = eventfd(0, EFD_NONBLOCK);
96 info->call = eventfd(0, EFD_NONBLOCK);
97 r = posix_memalign(&info->ring, 4096, vring_size(num, 4096));
98 assert(r >= 0);
99 memset(info->ring, 0, vring_size(num, 4096));
100 vring_init(&info->vring, num, info->ring, 4096);
101 info->vq = vring_new_virtqueue(info->idx,
102 info->vring.num, 4096, &dev->vdev,
103 true, info->ring,
104 vq_notify, vq_callback, "test");
105 assert(info->vq);
106 info->vq->priv = info;
107 vhost_vq_setup(dev, info);
108 dev->fds[info->idx].fd = info->call;
109 dev->fds[info->idx].events = POLLIN;
110 dev->nvqs++;
111}
112
113static void vdev_info_init(struct vdev_info* dev, unsigned long long features)
114{
115 int r;
116 memset(dev, 0, sizeof *dev);
117 dev->vdev.features = features;
118 dev->buf_size = 1024;
119 dev->buf = malloc(dev->buf_size);
120 assert(dev->buf);
121 dev->control = open("/dev/vhost-test", O_RDWR);
122 assert(dev->control >= 0);
123 r = ioctl(dev->control, VHOST_SET_OWNER, NULL);
124 assert(r >= 0);
125 dev->mem = malloc(offsetof(struct vhost_memory, regions) +
126 sizeof dev->mem->regions[0]);
127 assert(dev->mem);
128 memset(dev->mem, 0, offsetof(struct vhost_memory, regions) +
129 sizeof dev->mem->regions[0]);
130 dev->mem->nregions = 1;
131 dev->mem->regions[0].guest_phys_addr = (long)dev->buf;
132 dev->mem->regions[0].userspace_addr = (long)dev->buf;
133 dev->mem->regions[0].memory_size = dev->buf_size;
134 r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
135 assert(r >= 0);
136}
137
138/* TODO: this is pretty bad: we get a cache line bounce
139 * for the wait queue on poll and another one on read,
140 * plus the read which is there just to clear the
141 * current state. */
142static void wait_for_interrupt(struct vdev_info *dev)
143{
144 int i;
145 unsigned long long val;
146 poll(dev->fds, dev->nvqs, -1);
147 for (i = 0; i < dev->nvqs; ++i)
148 if (dev->fds[i].revents & POLLIN) {
149 read(dev->fds[i].fd, &val, sizeof val);
150 }
151}
152
153static void run_test(struct vdev_info *dev, struct vq_info *vq,
154 bool delayed, int bufs)
155{
156 struct scatterlist sl;
157 long started = 0, completed = 0;
158 long completed_before;
159 int r, test = 1;
160 unsigned len;
161 long long spurious = 0;
162 r = ioctl(dev->control, VHOST_TEST_RUN, &test);
163 assert(r >= 0);
164 for (;;) {
165 virtqueue_disable_cb(vq->vq);
166 completed_before = completed;
167 do {
168 if (started < bufs) {
169 sg_init_one(&sl, dev->buf, dev->buf_size);
170 r = virtqueue_add_outbuf(vq->vq, &sl, 1,
171 dev->buf + started,
172 GFP_ATOMIC);
173 if (likely(r == 0)) {
174 ++started;
175 if (unlikely(!virtqueue_kick(vq->vq)))
176 r = -1;
177 }
178 } else
179 r = -1;
180
181 /* Flush out completed bufs if any */
182 if (virtqueue_get_buf(vq->vq, &len)) {
183 ++completed;
184 r = 0;
185 }
186
187 } while (r == 0);
188 if (completed == completed_before)
189 ++spurious;
190 assert(completed <= bufs);
191 assert(started <= bufs);
192 if (completed == bufs)
193 break;
194 if (delayed) {
195 if (virtqueue_enable_cb_delayed(vq->vq))
196 wait_for_interrupt(dev);
197 } else {
198 if (virtqueue_enable_cb(vq->vq))
199 wait_for_interrupt(dev);
200 }
201 }
202 test = 0;
203 r = ioctl(dev->control, VHOST_TEST_RUN, &test);
204 assert(r >= 0);
205 fprintf(stderr, "spurious wakeus: 0x%llx\n", spurious);
206}
207
208const char optstring[] = "h";
209const struct option longopts[] = {
210 {
211 .name = "help",
212 .val = 'h',
213 },
214 {
215 .name = "event-idx",
216 .val = 'E',
217 },
218 {
219 .name = "no-event-idx",
220 .val = 'e',
221 },
222 {
223 .name = "indirect",
224 .val = 'I',
225 },
226 {
227 .name = "no-indirect",
228 .val = 'i',
229 },
230 {
231 .name = "virtio-1",
232 .val = '1',
233 },
234 {
235 .name = "no-virtio-1",
236 .val = '0',
237 },
238 {
239 .name = "delayed-interrupt",
240 .val = 'D',
241 },
242 {
243 .name = "no-delayed-interrupt",
244 .val = 'd',
245 },
246 {
247 }
248};
249
250static void help(void)
251{
252 fprintf(stderr, "Usage: virtio_test [--help]"
253 " [--no-indirect]"
254 " [--no-event-idx]"
255 " [--no-virtio-1]"
256 " [--delayed-interrupt]"
257 "\n");
258}
259
260int main(int argc, char **argv)
261{
262 struct vdev_info dev;
263 unsigned long long features = (1ULL << VIRTIO_RING_F_INDIRECT_DESC) |
264 (1ULL << VIRTIO_RING_F_EVENT_IDX) | (1ULL << VIRTIO_F_VERSION_1);
265 int o;
266 bool delayed = false;
267
268 for (;;) {
269 o = getopt_long(argc, argv, optstring, longopts, NULL);
270 switch (o) {
271 case -1:
272 goto done;
273 case '?':
274 help();
275 exit(2);
276 case 'e':
277 features &= ~(1ULL << VIRTIO_RING_F_EVENT_IDX);
278 break;
279 case 'h':
280 help();
281 goto done;
282 case 'i':
283 features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC);
284 break;
285 case '0':
286 features &= ~(1ULL << VIRTIO_F_VERSION_1);
287 break;
288 case 'D':
289 delayed = true;
290 break;
291 default:
292 assert(0);
293 break;
294 }
295 }
296
297done:
298 vdev_info_init(&dev, features);
299 vq_info_add(&dev, 256);
300 run_test(&dev, &dev.vqs[0], delayed, 0x100000);
301 return 0;
302}
1// SPDX-License-Identifier: GPL-2.0
2#define _GNU_SOURCE
3#include <getopt.h>
4#include <string.h>
5#include <poll.h>
6#include <sys/eventfd.h>
7#include <stdlib.h>
8#include <assert.h>
9#include <unistd.h>
10#include <sys/ioctl.h>
11#include <sys/stat.h>
12#include <sys/types.h>
13#include <fcntl.h>
14#include <stdbool.h>
15#include <linux/virtio_types.h>
16#include <linux/vhost.h>
17#include <linux/virtio.h>
18#include <linux/virtio_ring.h>
19#include "../../drivers/vhost/test.h"
20
21/* Unused */
22void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end;
23
24struct vq_info {
25 int kick;
26 int call;
27 int num;
28 int idx;
29 void *ring;
30 /* copy used for control */
31 struct vring vring;
32 struct virtqueue *vq;
33};
34
35struct vdev_info {
36 struct virtio_device vdev;
37 int control;
38 struct pollfd fds[1];
39 struct vq_info vqs[1];
40 int nvqs;
41 void *buf;
42 size_t buf_size;
43 struct vhost_memory *mem;
44};
45
46bool vq_notify(struct virtqueue *vq)
47{
48 struct vq_info *info = vq->priv;
49 unsigned long long v = 1;
50 int r;
51 r = write(info->kick, &v, sizeof v);
52 assert(r == sizeof v);
53 return true;
54}
55
56void vq_callback(struct virtqueue *vq)
57{
58}
59
60
61void vhost_vq_setup(struct vdev_info *dev, struct vq_info *info)
62{
63 struct vhost_vring_state state = { .index = info->idx };
64 struct vhost_vring_file file = { .index = info->idx };
65 unsigned long long features = dev->vdev.features;
66 struct vhost_vring_addr addr = {
67 .index = info->idx,
68 .desc_user_addr = (uint64_t)(unsigned long)info->vring.desc,
69 .avail_user_addr = (uint64_t)(unsigned long)info->vring.avail,
70 .used_user_addr = (uint64_t)(unsigned long)info->vring.used,
71 };
72 int r;
73 r = ioctl(dev->control, VHOST_SET_FEATURES, &features);
74 assert(r >= 0);
75 state.num = info->vring.num;
76 r = ioctl(dev->control, VHOST_SET_VRING_NUM, &state);
77 assert(r >= 0);
78 state.num = 0;
79 r = ioctl(dev->control, VHOST_SET_VRING_BASE, &state);
80 assert(r >= 0);
81 r = ioctl(dev->control, VHOST_SET_VRING_ADDR, &addr);
82 assert(r >= 0);
83 file.fd = info->kick;
84 r = ioctl(dev->control, VHOST_SET_VRING_KICK, &file);
85 assert(r >= 0);
86 file.fd = info->call;
87 r = ioctl(dev->control, VHOST_SET_VRING_CALL, &file);
88 assert(r >= 0);
89}
90
91static void vq_info_add(struct vdev_info *dev, int num)
92{
93 struct vq_info *info = &dev->vqs[dev->nvqs];
94 int r;
95 info->idx = dev->nvqs;
96 info->kick = eventfd(0, EFD_NONBLOCK);
97 info->call = eventfd(0, EFD_NONBLOCK);
98 r = posix_memalign(&info->ring, 4096, vring_size(num, 4096));
99 assert(r >= 0);
100 memset(info->ring, 0, vring_size(num, 4096));
101 vring_init(&info->vring, num, info->ring, 4096);
102 info->vq = vring_new_virtqueue(info->idx,
103 info->vring.num, 4096, &dev->vdev,
104 true, false, info->ring,
105 vq_notify, vq_callback, "test");
106 assert(info->vq);
107 info->vq->priv = info;
108 vhost_vq_setup(dev, info);
109 dev->fds[info->idx].fd = info->call;
110 dev->fds[info->idx].events = POLLIN;
111 dev->nvqs++;
112}
113
114static void vdev_info_init(struct vdev_info* dev, unsigned long long features)
115{
116 int r;
117 memset(dev, 0, sizeof *dev);
118 dev->vdev.features = features;
119 dev->buf_size = 1024;
120 dev->buf = malloc(dev->buf_size);
121 assert(dev->buf);
122 dev->control = open("/dev/vhost-test", O_RDWR);
123 assert(dev->control >= 0);
124 r = ioctl(dev->control, VHOST_SET_OWNER, NULL);
125 assert(r >= 0);
126 dev->mem = malloc(offsetof(struct vhost_memory, regions) +
127 sizeof dev->mem->regions[0]);
128 assert(dev->mem);
129 memset(dev->mem, 0, offsetof(struct vhost_memory, regions) +
130 sizeof dev->mem->regions[0]);
131 dev->mem->nregions = 1;
132 dev->mem->regions[0].guest_phys_addr = (long)dev->buf;
133 dev->mem->regions[0].userspace_addr = (long)dev->buf;
134 dev->mem->regions[0].memory_size = dev->buf_size;
135 r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
136 assert(r >= 0);
137}
138
139/* TODO: this is pretty bad: we get a cache line bounce
140 * for the wait queue on poll and another one on read,
141 * plus the read which is there just to clear the
142 * current state. */
143static void wait_for_interrupt(struct vdev_info *dev)
144{
145 int i;
146 unsigned long long val;
147 poll(dev->fds, dev->nvqs, -1);
148 for (i = 0; i < dev->nvqs; ++i)
149 if (dev->fds[i].revents & POLLIN) {
150 read(dev->fds[i].fd, &val, sizeof val);
151 }
152}
153
154static void run_test(struct vdev_info *dev, struct vq_info *vq,
155 bool delayed, int bufs)
156{
157 struct scatterlist sl;
158 long started = 0, completed = 0;
159 long completed_before;
160 int r, test = 1;
161 unsigned len;
162 long long spurious = 0;
163 r = ioctl(dev->control, VHOST_TEST_RUN, &test);
164 assert(r >= 0);
165 for (;;) {
166 virtqueue_disable_cb(vq->vq);
167 completed_before = completed;
168 do {
169 if (started < bufs) {
170 sg_init_one(&sl, dev->buf, dev->buf_size);
171 r = virtqueue_add_outbuf(vq->vq, &sl, 1,
172 dev->buf + started,
173 GFP_ATOMIC);
174 if (likely(r == 0)) {
175 ++started;
176 if (unlikely(!virtqueue_kick(vq->vq)))
177 r = -1;
178 }
179 } else
180 r = -1;
181
182 /* Flush out completed bufs if any */
183 if (virtqueue_get_buf(vq->vq, &len)) {
184 ++completed;
185 r = 0;
186 }
187
188 } while (r == 0);
189 if (completed == completed_before)
190 ++spurious;
191 assert(completed <= bufs);
192 assert(started <= bufs);
193 if (completed == bufs)
194 break;
195 if (delayed) {
196 if (virtqueue_enable_cb_delayed(vq->vq))
197 wait_for_interrupt(dev);
198 } else {
199 if (virtqueue_enable_cb(vq->vq))
200 wait_for_interrupt(dev);
201 }
202 }
203 test = 0;
204 r = ioctl(dev->control, VHOST_TEST_RUN, &test);
205 assert(r >= 0);
206 fprintf(stderr, "spurious wakeups: 0x%llx\n", spurious);
207}
208
209const char optstring[] = "h";
210const struct option longopts[] = {
211 {
212 .name = "help",
213 .val = 'h',
214 },
215 {
216 .name = "event-idx",
217 .val = 'E',
218 },
219 {
220 .name = "no-event-idx",
221 .val = 'e',
222 },
223 {
224 .name = "indirect",
225 .val = 'I',
226 },
227 {
228 .name = "no-indirect",
229 .val = 'i',
230 },
231 {
232 .name = "virtio-1",
233 .val = '1',
234 },
235 {
236 .name = "no-virtio-1",
237 .val = '0',
238 },
239 {
240 .name = "delayed-interrupt",
241 .val = 'D',
242 },
243 {
244 .name = "no-delayed-interrupt",
245 .val = 'd',
246 },
247 {
248 }
249};
250
251static void help(void)
252{
253 fprintf(stderr, "Usage: virtio_test [--help]"
254 " [--no-indirect]"
255 " [--no-event-idx]"
256 " [--no-virtio-1]"
257 " [--delayed-interrupt]"
258 "\n");
259}
260
261int main(int argc, char **argv)
262{
263 struct vdev_info dev;
264 unsigned long long features = (1ULL << VIRTIO_RING_F_INDIRECT_DESC) |
265 (1ULL << VIRTIO_RING_F_EVENT_IDX) | (1ULL << VIRTIO_F_VERSION_1);
266 int o;
267 bool delayed = false;
268
269 for (;;) {
270 o = getopt_long(argc, argv, optstring, longopts, NULL);
271 switch (o) {
272 case -1:
273 goto done;
274 case '?':
275 help();
276 exit(2);
277 case 'e':
278 features &= ~(1ULL << VIRTIO_RING_F_EVENT_IDX);
279 break;
280 case 'h':
281 help();
282 goto done;
283 case 'i':
284 features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC);
285 break;
286 case '0':
287 features &= ~(1ULL << VIRTIO_F_VERSION_1);
288 break;
289 case 'D':
290 delayed = true;
291 break;
292 default:
293 assert(0);
294 break;
295 }
296 }
297
298done:
299 vdev_info_init(&dev, features);
300 vq_info_add(&dev, 256);
301 run_test(&dev, &dev.vqs[0], delayed, 0x100000);
302 return 0;
303}