hw/input/virtio-input-hid.c

   1 /*
   2  * This work is licensed under the terms of the GNU GPL, version 2 or
   3  * (at your option) any later version.  See the COPYING file in the
   4  * top-level directory.
   5  */
   6
   7 #include "qemu/iov.h"
   8
   9 #include "hw/qdev.h"
  10 #include "hw/virtio/virtio.h"
  11 #include "hw/virtio/virtio-input.h"
  12
  13 #undef CONFIG_CURSES
  14 #include "ui/console.h"
  15
  16 #include "standard-headers/linux/input.h"
  17
  18 #define VIRTIO_ID_NAME_KEYBOARD "QEMU Virtio Keyboard"
  19 #define VIRTIO_ID_NAME_MOUSE    "QEMU Virtio Mouse"
  20 #define VIRTIO_ID_NAME_TABLET   "QEMU Virtio Tablet"
  21
  22 /* ----------------------------------------------------------------- */
  23
  24 static const unsigned int keymap_qcode[Q_KEY_CODE_MAX] = {
  25     [Q_KEY_CODE_ESC]                 = KEY_ESC,
  26     [Q_KEY_CODE_1]                   = KEY_1,
  27     [Q_KEY_CODE_2]                   = KEY_2,
  28     [Q_KEY_CODE_3]                   = KEY_3,
  29     [Q_KEY_CODE_4]                   = KEY_4,
  30     [Q_KEY_CODE_5]                   = KEY_5,
  31     [Q_KEY_CODE_6]                   = KEY_6,
  32     [Q_KEY_CODE_7]                   = KEY_7,
  33     [Q_KEY_CODE_8]                   = KEY_8,
  34     [Q_KEY_CODE_9]                   = KEY_9,
  35     [Q_KEY_CODE_0]                   = KEY_0,
  36     [Q_KEY_CODE_MINUS]               = KEY_MINUS,
  37     [Q_KEY_CODE_EQUAL]               = KEY_EQUAL,
  38     [Q_KEY_CODE_BACKSPACE]           = KEY_BACKSPACE,
  39
  40     [Q_KEY_CODE_TAB]                 = KEY_TAB,
  41     [Q_KEY_CODE_Q]                   = KEY_Q,
  42     [Q_KEY_CODE_W]                   = KEY_W,
  43     [Q_KEY_CODE_E]                   = KEY_E,
  44     [Q_KEY_CODE_R]                   = KEY_R,
  45     [Q_KEY_CODE_T]                   = KEY_T,
  46     [Q_KEY_CODE_Y]                   = KEY_Y,
  47     [Q_KEY_CODE_U]                   = KEY_U,
  48     [Q_KEY_CODE_I]                   = KEY_I,
  49     [Q_KEY_CODE_O]                   = KEY_O,
  50     [Q_KEY_CODE_P]                   = KEY_P,
  51     [Q_KEY_CODE_BRACKET_LEFT]        = KEY_LEFTBRACE,
  52     [Q_KEY_CODE_BRACKET_RIGHT]       = KEY_RIGHTBRACE,
  53     [Q_KEY_CODE_RET]                 = KEY_ENTER,
  54
  55     [Q_KEY_CODE_CTRL]                = KEY_LEFTCTRL,
  56     [Q_KEY_CODE_A]                   = KEY_A,
  57     [Q_KEY_CODE_S]                   = KEY_S,
  58     [Q_KEY_CODE_D]                   = KEY_D,
  59     [Q_KEY_CODE_F]                   = KEY_F,
  60     [Q_KEY_CODE_G]                   = KEY_G,
  61     [Q_KEY_CODE_H]                   = KEY_H,
  62     [Q_KEY_CODE_J]                   = KEY_J,
  63     [Q_KEY_CODE_K]                   = KEY_K,
  64     [Q_KEY_CODE_L]                   = KEY_L,
  65     [Q_KEY_CODE_SEMICOLON]           = KEY_SEMICOLON,
  66     [Q_KEY_CODE_APOSTROPHE]          = KEY_APOSTROPHE,
  67     [Q_KEY_CODE_GRAVE_ACCENT]        = KEY_GRAVE,
  68
  69     [Q_KEY_CODE_SHIFT]               = KEY_LEFTSHIFT,
  70     [Q_KEY_CODE_BACKSLASH]           = KEY_BACKSLASH,
  71     [Q_KEY_CODE_LESS]                = KEY_102ND,
  72     [Q_KEY_CODE_Z]                   = KEY_Z,
  73     [Q_KEY_CODE_X]                   = KEY_X,
  74     [Q_KEY_CODE_C]                   = KEY_C,
  75     [Q_KEY_CODE_V]                   = KEY_V,
  76     [Q_KEY_CODE_B]                   = KEY_B,
  77     [Q_KEY_CODE_N]                   = KEY_N,
  78     [Q_KEY_CODE_M]                   = KEY_M,
  79     [Q_KEY_CODE_COMMA]               = KEY_COMMA,
  80     [Q_KEY_CODE_DOT]                 = KEY_DOT,
  81     [Q_KEY_CODE_SLASH]               = KEY_SLASH,
  82     [Q_KEY_CODE_SHIFT_R]             = KEY_RIGHTSHIFT,
  83
  84     [Q_KEY_CODE_ALT]                 = KEY_LEFTALT,
  85     [Q_KEY_CODE_SPC]                 = KEY_SPACE,
  86     [Q_KEY_CODE_CAPS_LOCK]           = KEY_CAPSLOCK,
  87
  88     [Q_KEY_CODE_F1]                  = KEY_F1,
  89     [Q_KEY_CODE_F2]                  = KEY_F2,
  90     [Q_KEY_CODE_F3]                  = KEY_F3,
  91     [Q_KEY_CODE_F4]                  = KEY_F4,
  92     [Q_KEY_CODE_F5]                  = KEY_F5,
  93     [Q_KEY_CODE_F6]                  = KEY_F6,
  94     [Q_KEY_CODE_F7]                  = KEY_F7,
  95     [Q_KEY_CODE_F8]                  = KEY_F8,
  96     [Q_KEY_CODE_F9]                  = KEY_F9,
  97     [Q_KEY_CODE_F10]                 = KEY_F10,
  98     [Q_KEY_CODE_NUM_LOCK]            = KEY_NUMLOCK,
  99     [Q_KEY_CODE_SCROLL_LOCK]         = KEY_SCROLLLOCK,
 100
 101     [Q_KEY_CODE_KP_0]                = KEY_KP0,
 102     [Q_KEY_CODE_KP_1]                = KEY_KP1,
 103     [Q_KEY_CODE_KP_2]                = KEY_KP2,
 104     [Q_KEY_CODE_KP_3]                = KEY_KP3,
 105     [Q_KEY_CODE_KP_4]                = KEY_KP4,
 106     [Q_KEY_CODE_KP_5]                = KEY_KP5,
 107     [Q_KEY_CODE_KP_6]                = KEY_KP6,
 108     [Q_KEY_CODE_KP_7]                = KEY_KP7,
 109     [Q_KEY_CODE_KP_8]                = KEY_KP8,
 110     [Q_KEY_CODE_KP_9]                = KEY_KP9,
 111     [Q_KEY_CODE_KP_SUBTRACT]         = KEY_KPMINUS,
 112     [Q_KEY_CODE_KP_ADD]              = KEY_KPPLUS,
 113     [Q_KEY_CODE_KP_DECIMAL]          = KEY_KPDOT,
 114     [Q_KEY_CODE_KP_ENTER]            = KEY_KPENTER,
 115     [Q_KEY_CODE_KP_DIVIDE]           = KEY_KPSLASH,
 116     [Q_KEY_CODE_KP_MULTIPLY]         = KEY_KPASTERISK,
 117
 118     [Q_KEY_CODE_F11]                 = KEY_F11,
 119     [Q_KEY_CODE_F12]                 = KEY_F12,
 120
 121     [Q_KEY_CODE_CTRL_R]              = KEY_RIGHTCTRL,
 122     [Q_KEY_CODE_SYSRQ]               = KEY_SYSRQ,
 123     [Q_KEY_CODE_ALT_R]               = KEY_RIGHTALT,
 124
 125     [Q_KEY_CODE_HOME]                = KEY_HOME,
 126     [Q_KEY_CODE_UP]                  = KEY_UP,
 127     [Q_KEY_CODE_PGUP]                = KEY_PAGEUP,
 128     [Q_KEY_CODE_LEFT]                = KEY_LEFT,
 129     [Q_KEY_CODE_RIGHT]               = KEY_RIGHT,
 130     [Q_KEY_CODE_END]                 = KEY_END,
 131     [Q_KEY_CODE_DOWN]                = KEY_DOWN,
 132     [Q_KEY_CODE_PGDN]                = KEY_PAGEDOWN,
 133     [Q_KEY_CODE_INSERT]              = KEY_INSERT,
 134     [Q_KEY_CODE_DELETE]              = KEY_DELETE,
 135
 136     [Q_KEY_CODE_META_L]              = KEY_LEFTMETA,
 137     [Q_KEY_CODE_META_R]              = KEY_RIGHTMETA,
 138     [Q_KEY_CODE_MENU]                = KEY_MENU,
 139 };
 140
 141 static const unsigned int keymap_button[INPUT_BUTTON_MAX] = {
 142     [INPUT_BUTTON_LEFT]              = BTN_LEFT,
 143     [INPUT_BUTTON_RIGHT]             = BTN_RIGHT,
 144     [INPUT_BUTTON_MIDDLE]            = BTN_MIDDLE,
 145     [INPUT_BUTTON_WHEEL_UP]          = BTN_GEAR_UP,
 146     [INPUT_BUTTON_WHEEL_DOWN]        = BTN_GEAR_DOWN,
 147 };
 148
 149 static const unsigned int axismap_rel[INPUT_AXIS_MAX] = {
 150     [INPUT_AXIS_X]                   = REL_X,
 151     [INPUT_AXIS_Y]                   = REL_Y,
 152 };
 153
 154 static const unsigned int axismap_abs[INPUT_AXIS_MAX] = {
 155     [INPUT_AXIS_X]                   = ABS_X,
 156     [INPUT_AXIS_Y]                   = ABS_Y,
 157 };
 158
 159 /* ----------------------------------------------------------------- */
 160
 161 static void virtio_input_key_config(VirtIOInput *vinput,
 162                                     const unsigned int *keymap,
 163                                     size_t mapsize)
 164 {
 165     virtio_input_config keys;
 166     int i, bit, byte, bmax = 0;
 167
 168     memset(&keys, 0, sizeof(keys));
 169     for (i = 0; i < mapsize; i++) {
 170         bit = keymap[i];
 171         if (!bit) {
 172             continue;
 173         }
 174         byte = bit / 8;
 175         bit  = bit % 8;
 176         keys.u.bitmap[byte] |= (1 << bit);
 177         if (bmax < byte+1) {
 178             bmax = byte+1;
 179         }
 180     }
 181     keys.select = VIRTIO_INPUT_CFG_EV_BITS;
 182     keys.subsel = EV_KEY;
 183     keys.size   = bmax;
 184     virtio_input_add_config(vinput, &keys);
 185 }
 186
 187 static void virtio_input_handle_event(DeviceState *dev, QemuConsole *src,
 188                                       InputEvent *evt)
 189 {
 190     VirtIOInput *vinput = VIRTIO_INPUT(dev);
 191     virtio_input_event event;
 192     int qcode;
 193
 194     switch (evt->type) {
 195     case INPUT_EVENT_KIND_KEY:
 196         qcode = qemu_input_key_value_to_qcode(evt->u.key->key);
 197         if (qcode && keymap_qcode[qcode]) {
 198             event.type  = cpu_to_le16(EV_KEY);
 199             event.code  = cpu_to_le16(keymap_qcode[qcode]);
 200             event.value = cpu_to_le32(evt->u.key->down ? 1 : 0);
 201             virtio_input_send(vinput, &event);
 202         } else {
 203             if (evt->u.key->down) {
 204                 fprintf(stderr, "%s: unmapped key: %d [%s]\n", __func__,
 205                         qcode, QKeyCode_lookup[qcode]);
 206             }
 207         }
 208         break;
 209     case INPUT_EVENT_KIND_BTN:
 210         if (keymap_button[evt->u.btn->button]) {
 211             event.type  = cpu_to_le16(EV_KEY);
 212             event.code  = cpu_to_le16(keymap_button[evt->u.btn->button]);
 213             event.value = cpu_to_le32(evt->u.btn->down ? 1 : 0);
 214             virtio_input_send(vinput, &event);
 215         } else {
 216             if (evt->u.btn->down) {
 217                 fprintf(stderr, "%s: unmapped button: %d [%s]\n", __func__,
 218                         evt->u.btn->button,
 219                         InputButton_lookup[evt->u.btn->button]);
 220             }
 221         }
 222         break;
 223     case INPUT_EVENT_KIND_REL:
 224         event.type  = cpu_to_le16(EV_REL);
 225         event.code  = cpu_to_le16(axismap_rel[evt->u.rel->axis]);
 226         event.value = cpu_to_le32(evt->u.rel->value);
 227         virtio_input_send(vinput, &event);
 228         break;
 229     case INPUT_EVENT_KIND_ABS:
 230         event.type  = cpu_to_le16(EV_ABS);
 231         event.code  = cpu_to_le16(axismap_abs[evt->u.abs->axis]);
 232         event.value = cpu_to_le32(evt->u.abs->value);
 233         virtio_input_send(vinput, &event);
 234         break;
 235     default:
 236         /* keep gcc happy */
 237         break;
 238     }
 239 }
 240
 241 static void virtio_input_handle_sync(DeviceState *dev)
 242 {
 243     VirtIOInput *vinput = VIRTIO_INPUT(dev);
 244     virtio_input_event event = {
 245         .type  = cpu_to_le16(EV_SYN),
 246         .code  = cpu_to_le16(SYN_REPORT),
 247         .value = 0,
 248     };
 249
 250     virtio_input_send(vinput, &event);
 251 }
 252
 253 static void virtio_input_hid_realize(DeviceState *dev, Error **errp)
 254 {
 255     VirtIOInputHID *vhid = VIRTIO_INPUT_HID(dev);
 256
 257     vhid->hs = qemu_input_handler_register(dev, vhid->handler);
 258     if (vhid->display && vhid->hs) {
 259         qemu_input_handler_bind(vhid->hs, vhid->display, vhid->head, NULL);
 260     }
 261 }
 262
 263 static void virtio_input_hid_unrealize(DeviceState *dev, Error **errp)
 264 {
 265     VirtIOInputHID *vhid = VIRTIO_INPUT_HID(dev);
 266     qemu_input_handler_unregister(vhid->hs);
 267 }
 268
 269 static void virtio_input_hid_change_active(VirtIOInput *vinput)
 270 {
 271     VirtIOInputHID *vhid = VIRTIO_INPUT_HID(vinput);
 272
 273     if (vinput->active) {
 274         qemu_input_handler_activate(vhid->hs);
 275     } else {
 276         qemu_input_handler_deactivate(vhid->hs);
 277     }
 278 }
 279
 280 static void virtio_input_hid_handle_status(VirtIOInput *vinput,
 281                                            virtio_input_event *event)
 282 {
 283     VirtIOInputHID *vhid = VIRTIO_INPUT_HID(vinput);
 284     int ledbit = 0;
 285
 286     switch (le16_to_cpu(event->type)) {
 287     case EV_LED:
 288         if (event->code == LED_NUML) {
 289             ledbit = QEMU_NUM_LOCK_LED;
 290         } else if (event->code == LED_CAPSL) {
 291             ledbit = QEMU_CAPS_LOCK_LED;
 292         } else if (event->code == LED_SCROLLL) {
 293             ledbit = QEMU_SCROLL_LOCK_LED;
 294         }
 295         if (event->value) {
 296             vhid->ledstate |= ledbit;
 297         } else {
 298             vhid->ledstate &= ~ledbit;
 299         }
 300         kbd_put_ledstate(vhid->ledstate);
 301         break;
 302     default:
 303         fprintf(stderr, "%s: unknown type %d\n", __func__,
 304                 le16_to_cpu(event->type));
 305         break;
 306     }
 307 }
 308
 309 static Property virtio_input_hid_properties[] = {
 310     DEFINE_PROP_STRING("display", VirtIOInputHID, display),
 311     DEFINE_PROP_UINT32("head", VirtIOInputHID, head, 0),
 312     DEFINE_PROP_END_OF_LIST(),
 313 };
 314
 315 static void virtio_input_hid_class_init(ObjectClass *klass, void *data)
 316 {
 317     DeviceClass *dc = DEVICE_CLASS(klass);
 318     VirtIOInputClass *vic = VIRTIO_INPUT_CLASS(klass);
 319
 320     dc->props          = virtio_input_hid_properties;
 321     vic->realize       = virtio_input_hid_realize;
 322     vic->unrealize     = virtio_input_hid_unrealize;
 323     vic->change_active = virtio_input_hid_change_active;
 324     vic->handle_status = virtio_input_hid_handle_status;
 325 }
 326
 327 static const TypeInfo virtio_input_hid_info = {
 328     .name          = TYPE_VIRTIO_INPUT_HID,
 329     .parent        = TYPE_VIRTIO_INPUT,
 330     .instance_size = sizeof(VirtIOInputHID),
 331     .class_init    = virtio_input_hid_class_init,
 332     .abstract      = true,
 333 };
 334
 335 /* ----------------------------------------------------------------- */
 336
 337 static QemuInputHandler virtio_keyboard_handler = {
 338     .name  = VIRTIO_ID_NAME_KEYBOARD,
 339     .mask  = INPUT_EVENT_MASK_KEY,
 340     .event = virtio_input_handle_event,
 341     .sync  = virtio_input_handle_sync,
 342 };
 343
 344 static struct virtio_input_config virtio_keyboard_config[] = {
 345     {
 346         .select    = VIRTIO_INPUT_CFG_ID_NAME,
 347         .size      = sizeof(VIRTIO_ID_NAME_KEYBOARD),
 348         .u.string  = VIRTIO_ID_NAME_KEYBOARD,
 349     },{
 350         .select    = VIRTIO_INPUT_CFG_ID_DEVIDS,
 351         .size      = sizeof(struct virtio_input_devids),
 352         .u.ids     = {
 353             .bustype = const_le16(BUS_VIRTUAL),
 354             .vendor  = const_le16(0x0627), /* same we use for usb hid devices */
 355             .product = const_le16(0x0001),
 356             .version = const_le16(0x0001),
 357         },
 358     },{
 359         .select    = VIRTIO_INPUT_CFG_EV_BITS,
 360         .subsel    = EV_REP,
 361         .size      = 1,
 362     },{
 363         .select    = VIRTIO_INPUT_CFG_EV_BITS,
 364         .subsel    = EV_LED,
 365         .size      = 1,
 366         .u.bitmap  = {
 367             (1 << LED_NUML) | (1 << LED_CAPSL) | (1 << LED_SCROLLL),
 368         },
 369     },
 370     { /* end of list */ },
 371 };
 372
 373 static void virtio_keyboard_init(Object *obj)
 374 {
 375     VirtIOInputHID *vhid = VIRTIO_INPUT_HID(obj);
 376     VirtIOInput *vinput = VIRTIO_INPUT(obj);
 377
 378     vhid->handler = &virtio_keyboard_handler;
 379     virtio_input_init_config(vinput, virtio_keyboard_config);
 380     virtio_input_key_config(vinput, keymap_qcode,
 381                             ARRAY_SIZE(keymap_qcode));
 382 }
 383
 384 static const TypeInfo virtio_keyboard_info = {
 385     .name          = TYPE_VIRTIO_KEYBOARD,
 386     .parent        = TYPE_VIRTIO_INPUT_HID,
 387     .instance_size = sizeof(VirtIOInputHID),
 388     .instance_init = virtio_keyboard_init,
 389 };
 390
 391 /* ----------------------------------------------------------------- */
 392
 393 static QemuInputHandler virtio_mouse_handler = {
 394     .name  = VIRTIO_ID_NAME_MOUSE,
 395     .mask  = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
 396     .event = virtio_input_handle_event,
 397     .sync  = virtio_input_handle_sync,
 398 };
 399
 400 static struct virtio_input_config virtio_mouse_config[] = {
 401     {
 402         .select    = VIRTIO_INPUT_CFG_ID_NAME,
 403         .size      = sizeof(VIRTIO_ID_NAME_MOUSE),
 404         .u.string  = VIRTIO_ID_NAME_MOUSE,
 405     },{
 406         .select    = VIRTIO_INPUT_CFG_ID_DEVIDS,
 407         .size      = sizeof(struct virtio_input_devids),
 408         .u.ids     = {
 409             .bustype = const_le16(BUS_VIRTUAL),
 410             .vendor  = const_le16(0x0627), /* same we use for usb hid devices */
 411             .product = const_le16(0x0002),
 412             .version = const_le16(0x0001),
 413         },
 414     },{
 415         .select    = VIRTIO_INPUT_CFG_EV_BITS,
 416         .subsel    = EV_REL,
 417         .size      = 1,
 418         .u.bitmap  = {
 419             (1 << REL_X) | (1 << REL_Y),
 420         },
 421     },
 422     { /* end of list */ },
 423 };
 424
 425 static void virtio_mouse_init(Object *obj)
 426 {
 427     VirtIOInputHID *vhid = VIRTIO_INPUT_HID(obj);
 428     VirtIOInput *vinput = VIRTIO_INPUT(obj);
 429
 430     vhid->handler = &virtio_mouse_handler;
 431     virtio_input_init_config(vinput, virtio_mouse_config);
 432     virtio_input_key_config(vinput, keymap_button,
 433                             ARRAY_SIZE(keymap_button));
 434 }
 435
 436 static const TypeInfo virtio_mouse_info = {
 437     .name          = TYPE_VIRTIO_MOUSE,
 438     .parent        = TYPE_VIRTIO_INPUT_HID,
 439     .instance_size = sizeof(VirtIOInputHID),
 440     .instance_init = virtio_mouse_init,
 441 };
 442
 443 /* ----------------------------------------------------------------- */
 444
 445 static QemuInputHandler virtio_tablet_handler = {
 446     .name  = VIRTIO_ID_NAME_TABLET,
 447     .mask  = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_ABS,
 448     .event = virtio_input_handle_event,
 449     .sync  = virtio_input_handle_sync,
 450 };
 451
 452 static struct virtio_input_config virtio_tablet_config[] = {
 453     {
 454         .select    = VIRTIO_INPUT_CFG_ID_NAME,
 455         .size      = sizeof(VIRTIO_ID_NAME_TABLET),
 456         .u.string  = VIRTIO_ID_NAME_TABLET,
 457     },{
 458         .select    = VIRTIO_INPUT_CFG_ID_DEVIDS,
 459         .size      = sizeof(struct virtio_input_devids),
 460         .u.ids     = {
 461             .bustype = const_le16(BUS_VIRTUAL),
 462             .vendor  = const_le16(0x0627), /* same we use for usb hid devices */
 463             .product = const_le16(0x0003),
 464             .version = const_le16(0x0001),
 465         },
 466     },{
 467         .select    = VIRTIO_INPUT_CFG_EV_BITS,
 468         .subsel    = EV_ABS,
 469         .size      = 1,
 470         .u.bitmap  = {
 471             (1 << ABS_X) | (1 << ABS_Y),
 472         },
 473     },{
 474         .select    = VIRTIO_INPUT_CFG_ABS_INFO,
 475         .subsel    = ABS_X,
 476         .size      = sizeof(virtio_input_absinfo),
 477         .u.abs.max = const_le32(INPUT_EVENT_ABS_SIZE),
 478     },{
 479         .select    = VIRTIO_INPUT_CFG_ABS_INFO,
 480         .subsel    = ABS_Y,
 481         .size      = sizeof(virtio_input_absinfo),
 482         .u.abs.max = const_le32(INPUT_EVENT_ABS_SIZE),
 483     },
 484     { /* end of list */ },
 485 };
 486
 487 static void virtio_tablet_init(Object *obj)
 488 {
 489     VirtIOInputHID *vhid = VIRTIO_INPUT_HID(obj);
 490     VirtIOInput *vinput = VIRTIO_INPUT(obj);
 491
 492     vhid->handler = &virtio_tablet_handler;
 493     virtio_input_init_config(vinput, virtio_tablet_config);
 494     virtio_input_key_config(vinput, keymap_button,
 495                             ARRAY_SIZE(keymap_button));
 496 }
 497
 498 static const TypeInfo virtio_tablet_info = {
 499     .name          = TYPE_VIRTIO_TABLET,
 500     .parent        = TYPE_VIRTIO_INPUT_HID,
 501     .instance_size = sizeof(VirtIOInputHID),
 502     .instance_init = virtio_tablet_init,
 503 };
 504
 505 /* ----------------------------------------------------------------- */
 506
 507 static void virtio_register_types(void)
 508 {
 509     type_register_static(&virtio_input_hid_info);
 510     type_register_static(&virtio_keyboard_info);
 511     type_register_static(&virtio_mouse_info);
 512     type_register_static(&virtio_tablet_info);
 513 }
 514
 515 type_init(virtio_register_types)