Thomas Gleixner | 7a33847 | 2019-06-04 10:11:15 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 2 | /* Copyright (C) 2009 Red Hat, Inc. |
| 3 | * Author: Michael S. Tsirkin <mst@redhat.com> |
| 4 | * |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 5 | * test virtio server in host kernel. |
| 6 | */ |
| 7 | |
| 8 | #include <linux/compat.h> |
| 9 | #include <linux/eventfd.h> |
| 10 | #include <linux/vhost.h> |
| 11 | #include <linux/miscdevice.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/mutex.h> |
| 14 | #include <linux/workqueue.h> |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 15 | #include <linux/file.h> |
| 16 | #include <linux/slab.h> |
| 17 | |
| 18 | #include "test.h" |
Asias He | 6ac1afb | 2013-05-06 16:38:21 +0800 | [diff] [blame] | 19 | #include "vhost.h" |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 20 | |
| 21 | /* Max number of bytes transferred before requeueing the job. |
| 22 | * Using this limit prevents one virtqueue from starving others. */ |
| 23 | #define VHOST_TEST_WEIGHT 0x80000 |
| 24 | |
Tiwei Bie | 264b563 | 2019-08-28 13:37:00 +0800 | [diff] [blame] | 25 | /* Max number of packets transferred before requeueing the job. |
| 26 | * Using this limit prevents one virtqueue from starving others with |
| 27 | * pkts. |
| 28 | */ |
| 29 | #define VHOST_TEST_PKT_WEIGHT 256 |
| 30 | |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 31 | enum { |
| 32 | VHOST_TEST_VQ = 0, |
| 33 | VHOST_TEST_VQ_MAX = 1, |
| 34 | }; |
| 35 | |
| 36 | struct vhost_test { |
| 37 | struct vhost_dev dev; |
| 38 | struct vhost_virtqueue vqs[VHOST_TEST_VQ_MAX]; |
| 39 | }; |
| 40 | |
| 41 | /* Expects to be always run from workqueue - which acts as |
| 42 | * read-size critical section for our kind of RCU. */ |
| 43 | static void handle_vq(struct vhost_test *n) |
| 44 | { |
Michael S. Tsirkin | 09a34c8 | 2013-07-07 17:12:36 +0300 | [diff] [blame] | 45 | struct vhost_virtqueue *vq = &n->vqs[VHOST_TEST_VQ]; |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 46 | unsigned out, in; |
| 47 | int head; |
| 48 | size_t len, total_len = 0; |
| 49 | void *private; |
| 50 | |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 51 | mutex_lock(&vq->mutex); |
Eugenio Pérez | 247643f | 2020-03-31 21:27:57 +0200 | [diff] [blame] | 52 | private = vhost_vq_get_backend(vq); |
Michael S. Tsirkin | 09a34c8 | 2013-07-07 17:12:36 +0300 | [diff] [blame] | 53 | if (!private) { |
| 54 | mutex_unlock(&vq->mutex); |
| 55 | return; |
| 56 | } |
| 57 | |
Michael S. Tsirkin | 8ea8cf8 | 2011-05-20 02:10:54 +0300 | [diff] [blame] | 58 | vhost_disable_notify(&n->dev, vq); |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 59 | |
| 60 | for (;;) { |
Michael S. Tsirkin | 47283be | 2014-06-05 15:20:27 +0300 | [diff] [blame] | 61 | head = vhost_get_vq_desc(vq, vq->iov, |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 62 | ARRAY_SIZE(vq->iov), |
| 63 | &out, &in, |
| 64 | NULL, NULL); |
| 65 | /* On error, stop handling until the next kick. */ |
| 66 | if (unlikely(head < 0)) |
| 67 | break; |
| 68 | /* Nothing new? Wait for eventfd to tell us they refilled. */ |
| 69 | if (head == vq->num) { |
Michael S. Tsirkin | 8ea8cf8 | 2011-05-20 02:10:54 +0300 | [diff] [blame] | 70 | if (unlikely(vhost_enable_notify(&n->dev, vq))) { |
| 71 | vhost_disable_notify(&n->dev, vq); |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 72 | continue; |
| 73 | } |
| 74 | break; |
| 75 | } |
| 76 | if (in) { |
| 77 | vq_err(vq, "Unexpected descriptor format for TX: " |
| 78 | "out %d, int %d\n", out, in); |
| 79 | break; |
| 80 | } |
| 81 | len = iov_length(vq->iov, out); |
| 82 | /* Sanity check */ |
| 83 | if (!len) { |
| 84 | vq_err(vq, "Unexpected 0 len for TX\n"); |
| 85 | break; |
| 86 | } |
| 87 | vhost_add_used_and_signal(&n->dev, vq, head, 0); |
| 88 | total_len += len; |
Tiwei Bie | 264b563 | 2019-08-28 13:37:00 +0800 | [diff] [blame] | 89 | if (unlikely(vhost_exceeds_weight(vq, 0, total_len))) |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 90 | break; |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 91 | } |
| 92 | |
| 93 | mutex_unlock(&vq->mutex); |
| 94 | } |
| 95 | |
| 96 | static void handle_vq_kick(struct vhost_work *work) |
| 97 | { |
| 98 | struct vhost_virtqueue *vq = container_of(work, struct vhost_virtqueue, |
| 99 | poll.work); |
| 100 | struct vhost_test *n = container_of(vq->dev, struct vhost_test, dev); |
| 101 | |
| 102 | handle_vq(n); |
| 103 | } |
| 104 | |
| 105 | static int vhost_test_open(struct inode *inode, struct file *f) |
| 106 | { |
| 107 | struct vhost_test *n = kmalloc(sizeof *n, GFP_KERNEL); |
| 108 | struct vhost_dev *dev; |
Michael S. Tsirkin | 09a34c8 | 2013-07-07 17:12:36 +0300 | [diff] [blame] | 109 | struct vhost_virtqueue **vqs; |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 110 | |
| 111 | if (!n) |
| 112 | return -ENOMEM; |
Kees Cook | 6da2ec5 | 2018-06-12 13:55:00 -0700 | [diff] [blame] | 113 | vqs = kmalloc_array(VHOST_TEST_VQ_MAX, sizeof(*vqs), GFP_KERNEL); |
Michael S. Tsirkin | 09a34c8 | 2013-07-07 17:12:36 +0300 | [diff] [blame] | 114 | if (!vqs) { |
| 115 | kfree(n); |
| 116 | return -ENOMEM; |
| 117 | } |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 118 | |
| 119 | dev = &n->dev; |
Michael S. Tsirkin | 09a34c8 | 2013-07-07 17:12:36 +0300 | [diff] [blame] | 120 | vqs[VHOST_TEST_VQ] = &n->vqs[VHOST_TEST_VQ]; |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 121 | n->vqs[VHOST_TEST_VQ].handle_kick = handle_vq_kick; |
Tiwei Bie | 264b563 | 2019-08-28 13:37:00 +0800 | [diff] [blame] | 122 | vhost_dev_init(dev, vqs, VHOST_TEST_VQ_MAX, UIO_MAXIOV, |
Michael S. Tsirkin | 044e4b0 | 2020-06-08 08:42:09 -0400 | [diff] [blame] | 123 | VHOST_TEST_PKT_WEIGHT, VHOST_TEST_WEIGHT, true, NULL); |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 124 | |
| 125 | f->private_data = n; |
| 126 | |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | static void *vhost_test_stop_vq(struct vhost_test *n, |
| 131 | struct vhost_virtqueue *vq) |
| 132 | { |
| 133 | void *private; |
| 134 | |
| 135 | mutex_lock(&vq->mutex); |
Eugenio Pérez | 247643f | 2020-03-31 21:27:57 +0200 | [diff] [blame] | 136 | private = vhost_vq_get_backend(vq); |
| 137 | vhost_vq_set_backend(vq, NULL); |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 138 | mutex_unlock(&vq->mutex); |
| 139 | return private; |
| 140 | } |
| 141 | |
| 142 | static void vhost_test_stop(struct vhost_test *n, void **privatep) |
| 143 | { |
| 144 | *privatep = vhost_test_stop_vq(n, n->vqs + VHOST_TEST_VQ); |
| 145 | } |
| 146 | |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 147 | static void vhost_test_flush(struct vhost_test *n) |
| 148 | { |
Mike Christie | b2ffa407 | 2022-05-17 13:08:50 -0500 | [diff] [blame] | 149 | vhost_dev_flush(&n->dev); |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 150 | } |
| 151 | |
| 152 | static int vhost_test_release(struct inode *inode, struct file *f) |
| 153 | { |
| 154 | struct vhost_test *n = f->private_data; |
| 155 | void *private; |
| 156 | |
| 157 | vhost_test_stop(n, &private); |
| 158 | vhost_test_flush(n); |
Michael S. Tsirkin | 245cdd9 | 2019-10-07 13:56:59 -0400 | [diff] [blame] | 159 | vhost_dev_stop(&n->dev); |
夷则(Caspar) | f6f93f7 | 2017-12-25 00:08:58 +0800 | [diff] [blame] | 160 | vhost_dev_cleanup(&n->dev); |
Xianting Tian | 0800639 | 2021-12-28 11:09:24 +0800 | [diff] [blame] | 161 | kfree(n->dev.vqs); |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 162 | kfree(n); |
| 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | static long vhost_test_run(struct vhost_test *n, int test) |
| 167 | { |
| 168 | void *priv, *oldpriv; |
| 169 | struct vhost_virtqueue *vq; |
| 170 | int r, index; |
| 171 | |
| 172 | if (test < 0 || test > 1) |
| 173 | return -EINVAL; |
| 174 | |
| 175 | mutex_lock(&n->dev.mutex); |
| 176 | r = vhost_dev_check_owner(&n->dev); |
| 177 | if (r) |
| 178 | goto err; |
| 179 | |
| 180 | for (index = 0; index < n->dev.nvqs; ++index) { |
| 181 | /* Verify that ring has been setup correctly. */ |
| 182 | if (!vhost_vq_access_ok(&n->vqs[index])) { |
| 183 | r = -EFAULT; |
| 184 | goto err; |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | for (index = 0; index < n->dev.nvqs; ++index) { |
| 189 | vq = n->vqs + index; |
| 190 | mutex_lock(&vq->mutex); |
| 191 | priv = test ? n : NULL; |
| 192 | |
| 193 | /* start polling new socket */ |
Eugenio Pérez | 247643f | 2020-03-31 21:27:57 +0200 | [diff] [blame] | 194 | oldpriv = vhost_vq_get_backend(vq); |
| 195 | vhost_vq_set_backend(vq, priv); |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 196 | |
Greg Kurz | 80f7d03 | 2016-02-16 15:59:44 +0100 | [diff] [blame] | 197 | r = vhost_vq_init_access(&n->vqs[index]); |
Jason Wang | f59281d | 2011-06-21 18:04:27 +0800 | [diff] [blame] | 198 | |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 199 | mutex_unlock(&vq->mutex); |
| 200 | |
Jason Wang | f59281d | 2011-06-21 18:04:27 +0800 | [diff] [blame] | 201 | if (r) |
| 202 | goto err; |
| 203 | |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 204 | if (oldpriv) { |
Andrey Ryabinin | c551475 | 2022-05-17 13:08:46 -0500 | [diff] [blame] | 205 | vhost_test_flush(n); |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 206 | } |
| 207 | } |
| 208 | |
| 209 | mutex_unlock(&n->dev.mutex); |
| 210 | return 0; |
| 211 | |
| 212 | err: |
| 213 | mutex_unlock(&n->dev.mutex); |
| 214 | return r; |
| 215 | } |
| 216 | |
| 217 | static long vhost_test_reset_owner(struct vhost_test *n) |
| 218 | { |
| 219 | void *priv = NULL; |
| 220 | long err; |
Michael S. Tsirkin | 3302363 | 2020-04-01 12:46:22 -0400 | [diff] [blame] | 221 | struct vhost_iotlb *umem; |
Michael S. Tsirkin | 150b9e5 | 2013-04-28 17:12:08 +0300 | [diff] [blame] | 222 | |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 223 | mutex_lock(&n->dev.mutex); |
| 224 | err = vhost_dev_check_owner(&n->dev); |
| 225 | if (err) |
| 226 | goto done; |
Michael S. Tsirkin | 446374d | 2016-08-15 04:28:12 +0300 | [diff] [blame] | 227 | umem = vhost_dev_reset_owner_prepare(); |
| 228 | if (!umem) { |
Michael S. Tsirkin | 150b9e5 | 2013-04-28 17:12:08 +0300 | [diff] [blame] | 229 | err = -ENOMEM; |
| 230 | goto done; |
| 231 | } |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 232 | vhost_test_stop(n, &priv); |
| 233 | vhost_test_flush(n); |
Michael S. Tsirkin | 245cdd9 | 2019-10-07 13:56:59 -0400 | [diff] [blame] | 234 | vhost_dev_stop(&n->dev); |
Michael S. Tsirkin | 446374d | 2016-08-15 04:28:12 +0300 | [diff] [blame] | 235 | vhost_dev_reset_owner(&n->dev, umem); |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 236 | done: |
| 237 | mutex_unlock(&n->dev.mutex); |
| 238 | return err; |
| 239 | } |
| 240 | |
| 241 | static int vhost_test_set_features(struct vhost_test *n, u64 features) |
| 242 | { |
Michael S. Tsirkin | ea16c51 | 2014-06-05 15:20:23 +0300 | [diff] [blame] | 243 | struct vhost_virtqueue *vq; |
| 244 | |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 245 | mutex_lock(&n->dev.mutex); |
| 246 | if ((features & (1 << VHOST_F_LOG_ALL)) && |
| 247 | !vhost_log_access_ok(&n->dev)) { |
| 248 | mutex_unlock(&n->dev.mutex); |
| 249 | return -EFAULT; |
| 250 | } |
Michael S. Tsirkin | ea16c51 | 2014-06-05 15:20:23 +0300 | [diff] [blame] | 251 | vq = &n->vqs[VHOST_TEST_VQ]; |
| 252 | mutex_lock(&vq->mutex); |
| 253 | vq->acked_features = features; |
| 254 | mutex_unlock(&vq->mutex); |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 255 | mutex_unlock(&n->dev.mutex); |
| 256 | return 0; |
| 257 | } |
| 258 | |
Eugenio Pérez | 264ee5a | 2020-04-18 12:22:13 +0200 | [diff] [blame] | 259 | static long vhost_test_set_backend(struct vhost_test *n, unsigned index, int fd) |
| 260 | { |
| 261 | static void *backend; |
| 262 | |
| 263 | const bool enable = fd != -1; |
| 264 | struct vhost_virtqueue *vq; |
| 265 | int r; |
| 266 | |
| 267 | mutex_lock(&n->dev.mutex); |
| 268 | r = vhost_dev_check_owner(&n->dev); |
| 269 | if (r) |
| 270 | goto err; |
| 271 | |
| 272 | if (index >= VHOST_TEST_VQ_MAX) { |
| 273 | r = -ENOBUFS; |
| 274 | goto err; |
| 275 | } |
| 276 | vq = &n->vqs[index]; |
| 277 | mutex_lock(&vq->mutex); |
| 278 | |
| 279 | /* Verify that ring has been setup correctly. */ |
| 280 | if (!vhost_vq_access_ok(vq)) { |
| 281 | r = -EFAULT; |
| 282 | goto err_vq; |
| 283 | } |
| 284 | if (!enable) { |
| 285 | vhost_poll_stop(&vq->poll); |
| 286 | backend = vhost_vq_get_backend(vq); |
| 287 | vhost_vq_set_backend(vq, NULL); |
| 288 | } else { |
| 289 | vhost_vq_set_backend(vq, backend); |
| 290 | r = vhost_vq_init_access(vq); |
| 291 | if (r == 0) |
| 292 | r = vhost_poll_start(&vq->poll, vq->kick); |
| 293 | } |
| 294 | |
| 295 | mutex_unlock(&vq->mutex); |
| 296 | |
| 297 | if (enable) { |
Andrey Ryabinin | c551475 | 2022-05-17 13:08:46 -0500 | [diff] [blame] | 298 | vhost_test_flush(n); |
Eugenio Pérez | 264ee5a | 2020-04-18 12:22:13 +0200 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | mutex_unlock(&n->dev.mutex); |
| 302 | return 0; |
| 303 | |
| 304 | err_vq: |
| 305 | mutex_unlock(&vq->mutex); |
| 306 | err: |
| 307 | mutex_unlock(&n->dev.mutex); |
| 308 | return r; |
| 309 | } |
| 310 | |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 311 | static long vhost_test_ioctl(struct file *f, unsigned int ioctl, |
| 312 | unsigned long arg) |
| 313 | { |
Eugenio Pérez | 264ee5a | 2020-04-18 12:22:13 +0200 | [diff] [blame] | 314 | struct vhost_vring_file backend; |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 315 | struct vhost_test *n = f->private_data; |
| 316 | void __user *argp = (void __user *)arg; |
| 317 | u64 __user *featurep = argp; |
| 318 | int test; |
| 319 | u64 features; |
| 320 | int r; |
| 321 | switch (ioctl) { |
| 322 | case VHOST_TEST_RUN: |
| 323 | if (copy_from_user(&test, argp, sizeof test)) |
| 324 | return -EFAULT; |
| 325 | return vhost_test_run(n, test); |
Eugenio Pérez | 264ee5a | 2020-04-18 12:22:13 +0200 | [diff] [blame] | 326 | case VHOST_TEST_SET_BACKEND: |
| 327 | if (copy_from_user(&backend, argp, sizeof backend)) |
| 328 | return -EFAULT; |
| 329 | return vhost_test_set_backend(n, backend.index, backend.fd); |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 330 | case VHOST_GET_FEATURES: |
Michael S. Tsirkin | 09a34c8 | 2013-07-07 17:12:36 +0300 | [diff] [blame] | 331 | features = VHOST_FEATURES; |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 332 | if (copy_to_user(featurep, &features, sizeof features)) |
| 333 | return -EFAULT; |
| 334 | return 0; |
| 335 | case VHOST_SET_FEATURES: |
| 336 | if (copy_from_user(&features, featurep, sizeof features)) |
| 337 | return -EFAULT; |
Michael S. Tsirkin | 09a34c8 | 2013-07-07 17:12:36 +0300 | [diff] [blame] | 338 | if (features & ~VHOST_FEATURES) |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 339 | return -EOPNOTSUPP; |
| 340 | return vhost_test_set_features(n, features); |
| 341 | case VHOST_RESET_OWNER: |
| 342 | return vhost_test_reset_owner(n); |
| 343 | default: |
| 344 | mutex_lock(&n->dev.mutex); |
Michael S. Tsirkin | 73640c9 | 2013-03-18 13:22:18 +1030 | [diff] [blame] | 345 | r = vhost_dev_ioctl(&n->dev, ioctl, argp); |
| 346 | if (r == -ENOIOCTLCMD) |
| 347 | r = vhost_vring_ioctl(&n->dev, ioctl, argp); |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 348 | vhost_test_flush(n); |
| 349 | mutex_unlock(&n->dev.mutex); |
| 350 | return r; |
| 351 | } |
| 352 | } |
| 353 | |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 354 | static const struct file_operations vhost_test_fops = { |
| 355 | .owner = THIS_MODULE, |
| 356 | .release = vhost_test_release, |
| 357 | .unlocked_ioctl = vhost_test_ioctl, |
Arnd Bergmann | 407e9ef | 2018-09-11 17:23:00 +0200 | [diff] [blame] | 358 | .compat_ioctl = compat_ptr_ioctl, |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 359 | .open = vhost_test_open, |
| 360 | .llseek = noop_llseek, |
| 361 | }; |
| 362 | |
| 363 | static struct miscdevice vhost_test_misc = { |
| 364 | MISC_DYNAMIC_MINOR, |
| 365 | "vhost-test", |
| 366 | &vhost_test_fops, |
| 367 | }; |
PrasannaKumar Muralidharan | ca75d60 | 2016-08-25 22:30:49 +0530 | [diff] [blame] | 368 | module_misc_device(vhost_test_misc); |
Michael S. Tsirkin | 71ccc21 | 2010-11-29 19:09:01 +0200 | [diff] [blame] | 369 | |
| 370 | MODULE_VERSION("0.0.1"); |
| 371 | MODULE_LICENSE("GPL v2"); |
| 372 | MODULE_AUTHOR("Michael S. Tsirkin"); |
| 373 | MODULE_DESCRIPTION("Host kernel side for virtio simulator"); |