hw/display/vhost-user-gpu.c

   1 /*
   2  * vhost-user GPU Device
   3  *
   4  * Copyright Red Hat, Inc. 2018
   5  *
   6  * Authors:
   7  *     Marc-André Lureau <marcandre.lureau@redhat.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "qemu/sockets.h"
  15 #include "hw/qdev-properties.h"
  16 #include "hw/virtio/virtio-gpu.h"
  17 #include "chardev/char-fe.h"
  18 #include "qapi/error.h"
  19 #include "migration/blocker.h"
  20
  21 typedef enum VhostUserGpuRequest {
  22     VHOST_USER_GPU_NONE = 0,
  23     VHOST_USER_GPU_GET_PROTOCOL_FEATURES,
  24     VHOST_USER_GPU_SET_PROTOCOL_FEATURES,
  25     VHOST_USER_GPU_GET_DISPLAY_INFO,
  26     VHOST_USER_GPU_CURSOR_POS,
  27     VHOST_USER_GPU_CURSOR_POS_HIDE,
  28     VHOST_USER_GPU_CURSOR_UPDATE,
  29     VHOST_USER_GPU_SCANOUT,
  30     VHOST_USER_GPU_UPDATE,
  31     VHOST_USER_GPU_DMABUF_SCANOUT,
  32     VHOST_USER_GPU_DMABUF_UPDATE,
  33 } VhostUserGpuRequest;
  34
  35 typedef struct VhostUserGpuDisplayInfoReply {
  36     struct virtio_gpu_resp_display_info info;
  37 } VhostUserGpuDisplayInfoReply;
  38
  39 typedef struct VhostUserGpuCursorPos {
  40     uint32_t scanout_id;
  41     uint32_t x;
  42     uint32_t y;
  43 } QEMU_PACKED VhostUserGpuCursorPos;
  44
  45 typedef struct VhostUserGpuCursorUpdate {
  46     VhostUserGpuCursorPos pos;
  47     uint32_t hot_x;
  48     uint32_t hot_y;
  49     uint32_t data[64 * 64];
  50 } QEMU_PACKED VhostUserGpuCursorUpdate;
  51
  52 typedef struct VhostUserGpuScanout {
  53     uint32_t scanout_id;
  54     uint32_t width;
  55     uint32_t height;
  56 } QEMU_PACKED VhostUserGpuScanout;
  57
  58 typedef struct VhostUserGpuUpdate {
  59     uint32_t scanout_id;
  60     uint32_t x;
  61     uint32_t y;
  62     uint32_t width;
  63     uint32_t height;
  64     uint8_t data[];
  65 } QEMU_PACKED VhostUserGpuUpdate;
  66
  67 typedef struct VhostUserGpuDMABUFScanout {
  68     uint32_t scanout_id;
  69     uint32_t x;
  70     uint32_t y;
  71     uint32_t width;
  72     uint32_t height;
  73     uint32_t fd_width;
  74     uint32_t fd_height;
  75     uint32_t fd_stride;
  76     uint32_t fd_flags;
  77     int fd_drm_fourcc;
  78 } QEMU_PACKED VhostUserGpuDMABUFScanout;
  79
  80 typedef struct VhostUserGpuMsg {
  81     uint32_t request; /* VhostUserGpuRequest */
  82     uint32_t flags;
  83     uint32_t size; /* the following payload size */
  84     union {
  85         VhostUserGpuCursorPos cursor_pos;
  86         VhostUserGpuCursorUpdate cursor_update;
  87         VhostUserGpuScanout scanout;
  88         VhostUserGpuUpdate update;
  89         VhostUserGpuDMABUFScanout dmabuf_scanout;
  90         struct virtio_gpu_resp_display_info display_info;
  91         uint64_t u64;
  92     } payload;
  93 } QEMU_PACKED VhostUserGpuMsg;
  94
  95 static VhostUserGpuMsg m __attribute__ ((unused));
  96 #define VHOST_USER_GPU_HDR_SIZE \
  97     (sizeof(m.request) + sizeof(m.size) + sizeof(m.flags))
  98
  99 #define VHOST_USER_GPU_MSG_FLAG_REPLY 0x4
 100
 101 static void vhost_user_gpu_update_blocked(VhostUserGPU *g, bool blocked);
 102
 103 static void
 104 vhost_user_gpu_handle_cursor(VhostUserGPU *g, VhostUserGpuMsg *msg)
 105 {
 106     VhostUserGpuCursorPos *pos = &msg->payload.cursor_pos;
 107     struct virtio_gpu_scanout *s;
 108
 109     if (pos->scanout_id >= g->parent_obj.conf.max_outputs) {
 110         return;
 111     }
 112     s = &g->parent_obj.scanout[pos->scanout_id];
 113
 114     if (msg->request == VHOST_USER_GPU_CURSOR_UPDATE) {
 115         VhostUserGpuCursorUpdate *up = &msg->payload.cursor_update;
 116         if (!s->current_cursor) {
 117             s->current_cursor = cursor_alloc(64, 64);
 118         }
 119
 120         s->current_cursor->hot_x = up->hot_x;
 121         s->current_cursor->hot_y = up->hot_y;
 122
 123         memcpy(s->current_cursor->data, up->data,
 124                64 * 64 * sizeof(uint32_t));
 125
 126         dpy_cursor_define(s->con, s->current_cursor);
 127     }
 128
 129     dpy_mouse_set(s->con, pos->x, pos->y,
 130                   msg->request != VHOST_USER_GPU_CURSOR_POS_HIDE);
 131 }
 132
 133 static void
 134 vhost_user_gpu_send_msg(VhostUserGPU *g, const VhostUserGpuMsg *msg)
 135 {
 136     qemu_chr_fe_write(&g->vhost_chr, (uint8_t *)msg,
 137                       VHOST_USER_GPU_HDR_SIZE + msg->size);
 138 }
 139
 140 static void
 141 vhost_user_gpu_unblock(VhostUserGPU *g)
 142 {
 143     VhostUserGpuMsg msg = {
 144         .request = VHOST_USER_GPU_DMABUF_UPDATE,
 145         .flags = VHOST_USER_GPU_MSG_FLAG_REPLY,
 146     };
 147
 148     vhost_user_gpu_send_msg(g, &msg);
 149 }
 150
 151 static void
 152 vhost_user_gpu_handle_display(VhostUserGPU *g, VhostUserGpuMsg *msg)
 153 {
 154     QemuConsole *con = NULL;
 155     struct virtio_gpu_scanout *s;
 156
 157     switch (msg->request) {
 158     case VHOST_USER_GPU_GET_PROTOCOL_FEATURES: {
 159         VhostUserGpuMsg reply = {
 160             .request = msg->request,
 161             .flags = VHOST_USER_GPU_MSG_FLAG_REPLY,
 162             .size = sizeof(uint64_t),
 163         };
 164
 165         vhost_user_gpu_send_msg(g, &reply);
 166         break;
 167     }
 168     case VHOST_USER_GPU_SET_PROTOCOL_FEATURES: {
 169         break;
 170     }
 171     case VHOST_USER_GPU_GET_DISPLAY_INFO: {
 172         struct virtio_gpu_resp_display_info display_info = { {} };
 173         VhostUserGpuMsg reply = {
 174             .request = msg->request,
 175             .flags = VHOST_USER_GPU_MSG_FLAG_REPLY,
 176             .size = sizeof(struct virtio_gpu_resp_display_info),
 177         };
 178
 179         display_info.hdr.type = VIRTIO_GPU_RESP_OK_DISPLAY_INFO;
 180         virtio_gpu_base_fill_display_info(VIRTIO_GPU_BASE(g), &display_info);
 181         memcpy(&reply.payload.display_info, &display_info,
 182                sizeof(display_info));
 183         vhost_user_gpu_send_msg(g, &reply);
 184         break;
 185     }
 186     case VHOST_USER_GPU_SCANOUT: {
 187         VhostUserGpuScanout *m = &msg->payload.scanout;
 188
 189         if (m->scanout_id >= g->parent_obj.conf.max_outputs) {
 190             return;
 191         }
 192
 193         g->parent_obj.enable = 1;
 194         s = &g->parent_obj.scanout[m->scanout_id];
 195         con = s->con;
 196
 197         if (m->width == 0) {
 198             dpy_gfx_replace_surface(con, NULL);
 199         } else {
 200             s->ds = qemu_create_displaysurface(m->width, m->height);
 201             /* replace surface on next update */
 202         }
 203
 204         break;
 205     }
 206     case VHOST_USER_GPU_DMABUF_SCANOUT: {
 207         VhostUserGpuDMABUFScanout *m = &msg->payload.dmabuf_scanout;
 208         int fd = qemu_chr_fe_get_msgfd(&g->vhost_chr);
 209         QemuDmaBuf *dmabuf;
 210
 211         if (m->scanout_id >= g->parent_obj.conf.max_outputs) {
 212             error_report("invalid scanout: %d", m->scanout_id);
 213             if (fd >= 0) {
 214                 close(fd);
 215             }
 216             break;
 217         }
 218
 219         g->parent_obj.enable = 1;
 220         con = g->parent_obj.scanout[m->scanout_id].con;
 221         dmabuf = &g->dmabuf[m->scanout_id];
 222         if (dmabuf->fd >= 0) {
 223             close(dmabuf->fd);
 224             dmabuf->fd = -1;
 225         }
 226         dpy_gl_release_dmabuf(con, dmabuf);
 227         if (fd == -1) {
 228             dpy_gl_scanout_disable(con);
 229             break;
 230         }
 231         *dmabuf = (QemuDmaBuf) {
 232             .fd = fd,
 233             .width = m->fd_width,
 234             .height = m->fd_height,
 235             .stride = m->fd_stride,
 236             .fourcc = m->fd_drm_fourcc,
 237             .y0_top = m->fd_flags & VIRTIO_GPU_RESOURCE_FLAG_Y_0_TOP,
 238         };
 239         dpy_gl_scanout_dmabuf(con, dmabuf);
 240         break;
 241     }
 242     case VHOST_USER_GPU_DMABUF_UPDATE: {
 243         VhostUserGpuUpdate *m = &msg->payload.update;
 244
 245         if (m->scanout_id >= g->parent_obj.conf.max_outputs ||
 246             !g->parent_obj.scanout[m->scanout_id].con) {
 247             error_report("invalid scanout update: %d", m->scanout_id);
 248             vhost_user_gpu_unblock(g);
 249             break;
 250         }
 251
 252         con = g->parent_obj.scanout[m->scanout_id].con;
 253         if (!console_has_gl(con)) {
 254             error_report("console doesn't support GL!");
 255             vhost_user_gpu_unblock(g);
 256             break;
 257         }
 258         g->backend_blocked = true;
 259         dpy_gl_update(con, m->x, m->y, m->width, m->height);
 260         break;
 261     }
 262     case VHOST_USER_GPU_UPDATE: {
 263         VhostUserGpuUpdate *m = &msg->payload.update;
 264
 265         if (m->scanout_id >= g->parent_obj.conf.max_outputs) {
 266             break;
 267         }
 268         s = &g->parent_obj.scanout[m->scanout_id];
 269         con = s->con;
 270         pixman_image_t *image =
 271             pixman_image_create_bits(PIXMAN_x8r8g8b8,
 272                                      m->width,
 273                                      m->height,
 274                                      (uint32_t *)m->data,
 275                                      m->width * 4);
 276
 277         pixman_image_composite(PIXMAN_OP_SRC,
 278                                image, NULL, s->ds->image,
 279                                0, 0, 0, 0, m->x, m->y, m->width, m->height);
 280
 281         pixman_image_unref(image);
 282         if (qemu_console_surface(con) != s->ds) {
 283             dpy_gfx_replace_surface(con, s->ds);
 284         } else {
 285             dpy_gfx_update(con, m->x, m->y, m->width, m->height);
 286         }
 287         break;
 288     }
 289     default:
 290         g_warning("unhandled message %d %d", msg->request, msg->size);
 291     }
 292
 293     if (con && qemu_console_is_gl_blocked(con)) {
 294         vhost_user_gpu_update_blocked(g, true);
 295     }
 296 }
 297
 298 static void
 299 vhost_user_gpu_chr_read(void *opaque)
 300 {
 301     VhostUserGPU *g = opaque;
 302     VhostUserGpuMsg *msg = NULL;
 303     VhostUserGpuRequest request;
 304     uint32_t size, flags;
 305     int r;
 306
 307     r = qemu_chr_fe_read_all(&g->vhost_chr,
 308                              (uint8_t *)&request, sizeof(uint32_t));
 309     if (r != sizeof(uint32_t)) {
 310         error_report("failed to read msg header: %d, %d", r, errno);
 311         goto end;
 312     }
 313
 314     r = qemu_chr_fe_read_all(&g->vhost_chr,
 315                              (uint8_t *)&flags, sizeof(uint32_t));
 316     if (r != sizeof(uint32_t)) {
 317         error_report("failed to read msg flags");
 318         goto end;
 319     }
 320
 321     r = qemu_chr_fe_read_all(&g->vhost_chr,
 322                              (uint8_t *)&size, sizeof(uint32_t));
 323     if (r != sizeof(uint32_t)) {
 324         error_report("failed to read msg size");
 325         goto end;
 326     }
 327
 328     msg = g_malloc(VHOST_USER_GPU_HDR_SIZE + size);
 329
 330     r = qemu_chr_fe_read_all(&g->vhost_chr,
 331                              (uint8_t *)&msg->payload, size);
 332     if (r != size) {
 333         error_report("failed to read msg payload %d != %d", r, size);
 334         goto end;
 335     }
 336
 337     msg->request = request;
 338     msg->flags = size;
 339     msg->size = size;
 340
 341     if (request == VHOST_USER_GPU_CURSOR_UPDATE ||
 342         request == VHOST_USER_GPU_CURSOR_POS ||
 343         request == VHOST_USER_GPU_CURSOR_POS_HIDE) {
 344         vhost_user_gpu_handle_cursor(g, msg);
 345     } else {
 346         vhost_user_gpu_handle_display(g, msg);
 347     }
 348
 349 end:
 350     g_free(msg);
 351 }
 352
 353 static void
 354 vhost_user_gpu_update_blocked(VhostUserGPU *g, bool blocked)
 355 {
 356     qemu_set_fd_handler(g->vhost_gpu_fd,
 357                         blocked ? NULL : vhost_user_gpu_chr_read, NULL, g);
 358 }
 359
 360 static void
 361 vhost_user_gpu_gl_flushed(VirtIOGPUBase *b)
 362 {
 363     VhostUserGPU *g = VHOST_USER_GPU(b);
 364
 365     if (g->backend_blocked) {
 366         vhost_user_gpu_unblock(VHOST_USER_GPU(g));
 367         g->backend_blocked = false;
 368     }
 369
 370     vhost_user_gpu_update_blocked(VHOST_USER_GPU(g), false);
 371 }
 372
 373 static bool
 374 vhost_user_gpu_do_set_socket(VhostUserGPU *g, Error **errp)
 375 {
 376     Chardev *chr;
 377     int sv[2];
 378
 379     if (qemu_socketpair(PF_UNIX, SOCK_STREAM, 0, sv) == -1) {
 380         error_setg_errno(errp, errno, "socketpair() failed");
 381         return false;
 382     }
 383
 384     chr = CHARDEV(object_new(TYPE_CHARDEV_SOCKET));
 385     if (!chr || qemu_chr_add_client(chr, sv[0]) == -1) {
 386         error_setg(errp, "Failed to make socket chardev");
 387         goto err;
 388     }
 389     if (!qemu_chr_fe_init(&g->vhost_chr, chr, errp)) {
 390         goto err;
 391     }
 392     if (vhost_user_gpu_set_socket(&g->vhost->dev, sv[1]) < 0) {
 393         error_setg(errp, "Failed to set vhost-user-gpu socket");
 394         qemu_chr_fe_deinit(&g->vhost_chr, false);
 395         goto err;
 396     }
 397
 398     g->vhost_gpu_fd = sv[0];
 399     vhost_user_gpu_update_blocked(g, false);
 400     close(sv[1]);
 401     return true;
 402
 403 err:
 404     close(sv[0]);
 405     close(sv[1]);
 406     if (chr) {
 407         object_unref(OBJECT(chr));
 408     }
 409     return false;
 410 }
 411
 412 static void
 413 vhost_user_gpu_get_config(VirtIODevice *vdev, uint8_t *config_data)
 414 {
 415     VhostUserGPU *g = VHOST_USER_GPU(vdev);
 416     VirtIOGPUBase *b = VIRTIO_GPU_BASE(vdev);
 417     struct virtio_gpu_config *vgconfig =
 418         (struct virtio_gpu_config *)config_data;
 419     Error *local_err = NULL;
 420     int ret;
 421
 422     memset(config_data, 0, sizeof(struct virtio_gpu_config));
 423
 424     ret = vhost_dev_get_config(&g->vhost->dev,
 425                                config_data, sizeof(struct virtio_gpu_config),
 426                                &local_err);
 427     if (ret) {
 428         error_report_err(local_err);
 429         return;
 430     }
 431
 432     /* those fields are managed by qemu */
 433     vgconfig->num_scanouts = b->virtio_config.num_scanouts;
 434     vgconfig->events_read = b->virtio_config.events_read;
 435     vgconfig->events_clear = b->virtio_config.events_clear;
 436 }
 437
 438 static void
 439 vhost_user_gpu_set_config(VirtIODevice *vdev,
 440                           const uint8_t *config_data)
 441 {
 442     VhostUserGPU *g = VHOST_USER_GPU(vdev);
 443     VirtIOGPUBase *b = VIRTIO_GPU_BASE(vdev);
 444     const struct virtio_gpu_config *vgconfig =
 445         (const struct virtio_gpu_config *)config_data;
 446     int ret;
 447
 448     if (vgconfig->events_clear) {
 449         b->virtio_config.events_read &= ~vgconfig->events_clear;
 450     }
 451
 452     ret = vhost_dev_set_config(&g->vhost->dev, config_data,
 453                                0, sizeof(struct virtio_gpu_config),
 454                                VHOST_SET_CONFIG_TYPE_MASTER);
 455     if (ret) {
 456         error_report("vhost-user-gpu: set device config space failed");
 457         return;
 458     }
 459 }
 460
 461 static void
 462 vhost_user_gpu_set_status(VirtIODevice *vdev, uint8_t val)
 463 {
 464     VhostUserGPU *g = VHOST_USER_GPU(vdev);
 465     Error *err = NULL;
 466
 467     if (val & VIRTIO_CONFIG_S_DRIVER_OK && vdev->vm_running) {
 468         if (!vhost_user_gpu_do_set_socket(g, &err)) {
 469             error_report_err(err);
 470             return;
 471         }
 472         vhost_user_backend_start(g->vhost);
 473     } else {
 474         /* unblock any wait and stop processing */
 475         if (g->vhost_gpu_fd != -1) {
 476             vhost_user_gpu_update_blocked(g, true);
 477             qemu_chr_fe_deinit(&g->vhost_chr, true);
 478             g->vhost_gpu_fd = -1;
 479         }
 480         vhost_user_backend_stop(g->vhost);
 481     }
 482 }
 483
 484 static bool
 485 vhost_user_gpu_guest_notifier_pending(VirtIODevice *vdev, int idx)
 486 {
 487     VhostUserGPU *g = VHOST_USER_GPU(vdev);
 488
 489     return vhost_virtqueue_pending(&g->vhost->dev, idx);
 490 }
 491
 492 static void
 493 vhost_user_gpu_guest_notifier_mask(VirtIODevice *vdev, int idx, bool mask)
 494 {
 495     VhostUserGPU *g = VHOST_USER_GPU(vdev);
 496
 497     vhost_virtqueue_mask(&g->vhost->dev, vdev, idx, mask);
 498 }
 499
 500 static void
 501 vhost_user_gpu_instance_init(Object *obj)
 502 {
 503     VhostUserGPU *g = VHOST_USER_GPU(obj);
 504
 505     g->vhost = VHOST_USER_BACKEND(object_new(TYPE_VHOST_USER_BACKEND));
 506     object_property_add_alias(obj, "chardev",
 507                               OBJECT(g->vhost), "chardev");
 508 }
 509
 510 static void
 511 vhost_user_gpu_instance_finalize(Object *obj)
 512 {
 513     VhostUserGPU *g = VHOST_USER_GPU(obj);
 514
 515     object_unref(OBJECT(g->vhost));
 516 }
 517
 518 static void
 519 vhost_user_gpu_reset(VirtIODevice *vdev)
 520 {
 521     VhostUserGPU *g = VHOST_USER_GPU(vdev);
 522
 523     virtio_gpu_base_reset(VIRTIO_GPU_BASE(vdev));
 524
 525     vhost_user_backend_stop(g->vhost);
 526 }
 527
 528 static int
 529 vhost_user_gpu_config_change(struct vhost_dev *dev)
 530 {
 531     error_report("vhost-user-gpu: unhandled backend config change");
 532     return -1;
 533 }
 534
 535 static const VhostDevConfigOps config_ops = {
 536     .vhost_dev_config_notifier = vhost_user_gpu_config_change,
 537 };
 538
 539 static void
 540 vhost_user_gpu_device_realize(DeviceState *qdev, Error **errp)
 541 {
 542     VhostUserGPU *g = VHOST_USER_GPU(qdev);
 543     VirtIODevice *vdev = VIRTIO_DEVICE(g);
 544
 545     vhost_dev_set_config_notifier(&g->vhost->dev, &config_ops);
 546     if (vhost_user_backend_dev_init(g->vhost, vdev, 2, errp) < 0) {
 547         return;
 548     }
 549
 550     /* existing backend may send DMABUF, so let's add that requirement */
 551     g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_DMABUF_ENABLED;
 552     if (virtio_has_feature(g->vhost->dev.features, VIRTIO_GPU_F_VIRGL)) {
 553         g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED;
 554     }
 555     if (virtio_has_feature(g->vhost->dev.features, VIRTIO_GPU_F_EDID)) {
 556         g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_EDID_ENABLED;
 557     } else {
 558         error_report("EDID requested but the backend doesn't support it.");
 559         g->parent_obj.conf.flags &= ~(1 << VIRTIO_GPU_FLAG_EDID_ENABLED);
 560     }
 561
 562     if (!virtio_gpu_base_device_realize(qdev, NULL, NULL, errp)) {
 563         return;
 564     }
 565
 566     g->vhost_gpu_fd = -1;
 567 }
 568
 569 static struct vhost_dev *vhost_user_gpu_get_vhost(VirtIODevice *vdev)
 570 {
 571     VhostUserGPU *g = VHOST_USER_GPU(vdev);
 572     return &g->vhost->dev;
 573 }
 574
 575 static Property vhost_user_gpu_properties[] = {
 576     VIRTIO_GPU_BASE_PROPERTIES(VhostUserGPU, parent_obj.conf),
 577     DEFINE_PROP_END_OF_LIST(),
 578 };
 579
 580 static void
 581 vhost_user_gpu_class_init(ObjectClass *klass, void *data)
 582 {
 583     DeviceClass *dc = DEVICE_CLASS(klass);
 584     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
 585     VirtIOGPUBaseClass *vgc = VIRTIO_GPU_BASE_CLASS(klass);
 586
 587     vgc->gl_flushed = vhost_user_gpu_gl_flushed;
 588
 589     vdc->realize = vhost_user_gpu_device_realize;
 590     vdc->reset = vhost_user_gpu_reset;
 591     vdc->set_status   = vhost_user_gpu_set_status;
 592     vdc->guest_notifier_mask = vhost_user_gpu_guest_notifier_mask;
 593     vdc->guest_notifier_pending = vhost_user_gpu_guest_notifier_pending;
 594     vdc->get_config = vhost_user_gpu_get_config;
 595     vdc->set_config = vhost_user_gpu_set_config;
 596     vdc->get_vhost = vhost_user_gpu_get_vhost;
 597
 598     device_class_set_props(dc, vhost_user_gpu_properties);
 599 }
 600
 601 static const TypeInfo vhost_user_gpu_info = {
 602     .name = TYPE_VHOST_USER_GPU,
 603     .parent = TYPE_VIRTIO_GPU_BASE,
 604     .instance_size = sizeof(VhostUserGPU),
 605     .instance_init = vhost_user_gpu_instance_init,
 606     .instance_finalize = vhost_user_gpu_instance_finalize,
 607     .class_init = vhost_user_gpu_class_init,
 608 };
 609 module_obj(TYPE_VHOST_USER_GPU);
 610 module_kconfig(VHOST_USER_GPU);
 611
 612 static void vhost_user_gpu_register_types(void)
 613 {
 614     type_register_static(&vhost_user_gpu_info);
 615 }
 616
 617 type_init(vhost_user_gpu_register_types)