hw/s390x/s390-virtio-bus.c

   1 /*
   2  * QEMU S390 virtio target
   3  *
   4  * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "hw/hw.h"
  21 #include "block/block.h"
  22 #include "sysemu/sysemu.h"
  23 #include "hw/boards.h"
  24 #include "monitor/monitor.h"
  25 #include "hw/loader.h"
  26 #include "elf.h"
  27 #include "hw/virtio.h"
  28 #include "hw/virtio-rng.h"
  29 #include "hw/virtio-serial.h"
  30 #include "hw/virtio-net.h"
  31 #include "hw/sysbus.h"
  32 #include "sysemu/kvm.h"
  33
  34 #include "hw/s390x/s390-virtio-bus.h"
  35 #include "hw/virtio-bus.h"
  36
  37 /* #define DEBUG_S390 */
  38
  39 #ifdef DEBUG_S390
  40 #define dprintf(fmt, ...) \
  41     do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  42 #else
  43 #define dprintf(fmt, ...) \
  44     do { } while (0)
  45 #endif
  46
  47 #define VIRTIO_EXT_CODE   0x2603
  48
  49 static const TypeInfo s390_virtio_bus_info = {
  50     .name = TYPE_S390_VIRTIO_BUS,
  51     .parent = TYPE_BUS,
  52     .instance_size = sizeof(VirtIOS390Bus),
  53 };
  54
  55 static const VirtIOBindings virtio_s390_bindings;
  56
  57 static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev);
  58
  59 /* length of VirtIO device pages */
  60 const hwaddr virtio_size = S390_DEVICE_PAGES * TARGET_PAGE_SIZE;
  61
  62 static void s390_virtio_bus_reset(void *opaque)
  63 {
  64     VirtIOS390Bus *bus = opaque;
  65     bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE;
  66 }
  67
  68 void s390_virtio_reset_idx(VirtIOS390Device *dev)
  69 {
  70     int i;
  71     hwaddr idx_addr;
  72     uint8_t num_vq;
  73
  74     num_vq = s390_virtio_device_num_vq(dev);
  75     for (i = 0; i < num_vq; i++) {
  76         idx_addr = virtio_queue_get_avail_addr(dev->vdev, i) +
  77             VIRTIO_VRING_AVAIL_IDX_OFFS;
  78         stw_phys(idx_addr, 0);
  79         idx_addr = virtio_queue_get_used_addr(dev->vdev, i) +
  80             VIRTIO_VRING_USED_IDX_OFFS;
  81         stw_phys(idx_addr, 0);
  82     }
  83 }
  84
  85 VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size)
  86 {
  87     VirtIOS390Bus *bus;
  88     BusState *_bus;
  89     DeviceState *dev;
  90
  91     /* Create bridge device */
  92     dev = qdev_create(NULL, "s390-virtio-bridge");
  93     qdev_init_nofail(dev);
  94
  95     /* Create bus on bridge device */
  96
  97     _bus = qbus_create(TYPE_S390_VIRTIO_BUS, dev, "s390-virtio");
  98     bus = DO_UPCAST(VirtIOS390Bus, bus, _bus);
  99
 100     bus->dev_page = *ram_size;
 101     bus->dev_offs = bus->dev_page;
 102     bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE;
 103
 104     /* Enable hotplugging */
 105     _bus->allow_hotplug = 1;
 106
 107     /* Allocate RAM for VirtIO device pages (descriptors, queues, rings) */
 108     *ram_size += S390_DEVICE_PAGES * TARGET_PAGE_SIZE;
 109
 110     qemu_register_reset(s390_virtio_bus_reset, bus);
 111     return bus;
 112 }
 113
 114 static void s390_virtio_irq(S390CPU *cpu, int config_change, uint64_t token)
 115 {
 116     if (kvm_enabled()) {
 117         kvm_s390_virtio_irq(cpu, config_change, token);
 118     } else {
 119         cpu_inject_ext(cpu, VIRTIO_EXT_CODE, config_change, token);
 120     }
 121 }
 122
 123 static int s390_virtio_device_init(VirtIOS390Device *dev, VirtIODevice *vdev)
 124 {
 125     VirtIOS390Bus *bus;
 126     int dev_len;
 127
 128     bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
 129     dev->vdev = vdev;
 130     dev->dev_offs = bus->dev_offs;
 131     dev->feat_len = sizeof(uint32_t); /* always keep 32 bits features */
 132
 133     dev_len = VIRTIO_DEV_OFFS_CONFIG;
 134     dev_len += s390_virtio_device_num_vq(dev) * VIRTIO_VQCONFIG_LEN;
 135     dev_len += dev->feat_len * 2;
 136     dev_len += vdev->config_len;
 137
 138     bus->dev_offs += dev_len;
 139
 140     virtio_bind_device(vdev, &virtio_s390_bindings, DEVICE(dev));
 141     dev->host_features = vdev->get_features(vdev, dev->host_features);
 142     s390_virtio_device_sync(dev);
 143     s390_virtio_reset_idx(dev);
 144     if (dev->qdev.hotplugged) {
 145         S390CPU *cpu = s390_cpu_addr2state(0);
 146         s390_virtio_irq(cpu, VIRTIO_PARAM_DEV_ADD, dev->dev_offs);
 147     }
 148
 149     return 0;
 150 }
 151
 152 static int s390_virtio_net_init(VirtIOS390Device *dev)
 153 {
 154     VirtIODevice *vdev;
 155
 156     vdev = virtio_net_init((DeviceState *)dev, &dev->nic, &dev->net,
 157                            dev->host_features);
 158     if (!vdev) {
 159         return -1;
 160     }
 161
 162     return s390_virtio_device_init(dev, vdev);
 163 }
 164
 165 static int s390_virtio_blk_init(VirtIOS390Device *s390_dev)
 166 {
 167     VirtIOBlkS390 *dev = VIRTIO_BLK_S390(s390_dev);
 168     DeviceState *vdev = DEVICE(&dev->vdev);
 169     virtio_blk_set_conf(vdev, &(dev->blk));
 170     qdev_set_parent_bus(vdev, BUS(&s390_dev->bus));
 171     if (qdev_init(vdev) < 0) {
 172         return -1;
 173     }
 174     return s390_virtio_device_init(s390_dev, VIRTIO_DEVICE(vdev));
 175 }
 176
 177 static void s390_virtio_blk_instance_init(Object *obj)
 178 {
 179     VirtIOBlkS390 *dev = VIRTIO_BLK_S390(obj);
 180     object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BLK);
 181     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 182 }
 183
 184 static int s390_virtio_serial_init(VirtIOS390Device *dev)
 185 {
 186     VirtIOS390Bus *bus;
 187     VirtIODevice *vdev;
 188     int r;
 189
 190     bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
 191
 192     vdev = virtio_serial_init((DeviceState *)dev, &dev->serial);
 193     if (!vdev) {
 194         return -1;
 195     }
 196
 197     r = s390_virtio_device_init(dev, vdev);
 198     if (!r) {
 199         bus->console = dev;
 200     }
 201
 202     return r;
 203 }
 204
 205 static int s390_virtio_scsi_init(VirtIOS390Device *s390_dev)
 206 {
 207     VirtIOSCSIS390 *dev = VIRTIO_SCSI_S390(s390_dev);
 208     DeviceState *vdev = DEVICE(&dev->vdev);
 209
 210     qdev_set_parent_bus(vdev, BUS(&s390_dev->bus));
 211     if (qdev_init(vdev) < 0) {
 212         return -1;
 213     }
 214
 215     return s390_virtio_device_init(s390_dev, VIRTIO_DEVICE(vdev));
 216 }
 217
 218 static void s390_virtio_scsi_instance_init(Object *obj)
 219 {
 220     VirtIOSCSIS390 *dev = VIRTIO_SCSI_S390(obj);
 221     object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SCSI);
 222     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 223 }
 224
 225 static int s390_virtio_rng_init(VirtIOS390Device *dev)
 226 {
 227     VirtIODevice *vdev;
 228
 229     vdev = virtio_rng_init((DeviceState *)dev, &dev->rng);
 230     if (!vdev) {
 231         return -1;
 232     }
 233
 234     return s390_virtio_device_init(dev, vdev);
 235 }
 236
 237 static uint64_t s390_virtio_device_vq_token(VirtIOS390Device *dev, int vq)
 238 {
 239     ram_addr_t token_off;
 240
 241     token_off = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) +
 242                 (vq * VIRTIO_VQCONFIG_LEN) +
 243                 VIRTIO_VQCONFIG_OFFS_TOKEN;
 244
 245     return ldq_be_phys(token_off);
 246 }
 247
 248 static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev)
 249 {
 250     VirtIODevice *vdev = dev->vdev;
 251     int num_vq;
 252
 253     for (num_vq = 0; num_vq < VIRTIO_PCI_QUEUE_MAX; num_vq++) {
 254         if (!virtio_queue_get_num(vdev, num_vq)) {
 255             break;
 256         }
 257     }
 258
 259     return num_vq;
 260 }
 261
 262 static ram_addr_t s390_virtio_next_ring(VirtIOS390Bus *bus)
 263 {
 264     ram_addr_t r = bus->next_ring;
 265
 266     bus->next_ring += VIRTIO_RING_LEN;
 267     return r;
 268 }
 269
 270 void s390_virtio_device_sync(VirtIOS390Device *dev)
 271 {
 272     VirtIOS390Bus *bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
 273     ram_addr_t cur_offs;
 274     uint8_t num_vq;
 275     int i;
 276
 277     virtio_reset(dev->vdev);
 278
 279     /* Sync dev space */
 280     stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_TYPE, dev->vdev->device_id);
 281
 282     stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, s390_virtio_device_num_vq(dev));
 283     stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_FEATURE_LEN, dev->feat_len);
 284
 285     stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG_LEN, dev->vdev->config_len);
 286
 287     num_vq = s390_virtio_device_num_vq(dev);
 288     stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, num_vq);
 289
 290     /* Sync virtqueues */
 291     for (i = 0; i < num_vq; i++) {
 292         ram_addr_t vq = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) +
 293                         (i * VIRTIO_VQCONFIG_LEN);
 294         ram_addr_t vring;
 295
 296         vring = s390_virtio_next_ring(bus);
 297         virtio_queue_set_addr(dev->vdev, i, vring);
 298         virtio_queue_set_vector(dev->vdev, i, i);
 299         stq_be_phys(vq + VIRTIO_VQCONFIG_OFFS_ADDRESS, vring);
 300         stw_be_phys(vq + VIRTIO_VQCONFIG_OFFS_NUM, virtio_queue_get_num(dev->vdev, i));
 301     }
 302
 303     cur_offs = dev->dev_offs;
 304     cur_offs += VIRTIO_DEV_OFFS_CONFIG;
 305     cur_offs += num_vq * VIRTIO_VQCONFIG_LEN;
 306
 307     /* Sync feature bitmap */
 308     stl_le_phys(cur_offs, dev->host_features);
 309
 310     dev->feat_offs = cur_offs + dev->feat_len;
 311     cur_offs += dev->feat_len * 2;
 312
 313     /* Sync config space */
 314     if (dev->vdev->get_config) {
 315         dev->vdev->get_config(dev->vdev, dev->vdev->config);
 316     }
 317
 318     cpu_physical_memory_write(cur_offs,
 319                               dev->vdev->config, dev->vdev->config_len);
 320     cur_offs += dev->vdev->config_len;
 321 }
 322
 323 void s390_virtio_device_update_status(VirtIOS390Device *dev)
 324 {
 325     VirtIODevice *vdev = dev->vdev;
 326     uint32_t features;
 327
 328     virtio_set_status(vdev, ldub_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS));
 329
 330     /* Update guest supported feature bitmap */
 331
 332     features = bswap32(ldl_be_phys(dev->feat_offs));
 333     virtio_set_features(vdev, features);
 334 }
 335
 336 VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus)
 337 {
 338     return bus->console;
 339 }
 340
 341 /* Find a device by vring address */
 342 VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus,
 343                                              ram_addr_t mem,
 344                                              int *vq_num)
 345 {
 346     BusChild *kid;
 347     int i;
 348
 349     QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
 350         VirtIOS390Device *dev = (VirtIOS390Device *)kid->child;
 351
 352         for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
 353             if (!virtio_queue_get_addr(dev->vdev, i))
 354                 break;
 355             if (virtio_queue_get_addr(dev->vdev, i) == mem) {
 356                 if (vq_num) {
 357                     *vq_num = i;
 358                 }
 359                 return dev;
 360             }
 361         }
 362     }
 363
 364     return NULL;
 365 }
 366
 367 /* Find a device by device descriptor location */
 368 VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus, ram_addr_t mem)
 369 {
 370     BusChild *kid;
 371
 372     QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
 373         VirtIOS390Device *dev = (VirtIOS390Device *)kid->child;
 374         if (dev->dev_offs == mem) {
 375             return dev;
 376         }
 377     }
 378
 379     return NULL;
 380 }
 381
 382 /* DeviceState to VirtIOS390Device. Note: used on datapath,
 383  * be careful and test performance if you change this.
 384  */
 385 static inline VirtIOS390Device *to_virtio_s390_device_fast(DeviceState *d)
 386 {
 387     return container_of(d, VirtIOS390Device, qdev);
 388 }
 389
 390 /* DeviceState to VirtIOS390Device. TODO: use QOM. */
 391 static inline VirtIOS390Device *to_virtio_s390_device(DeviceState *d)
 392 {
 393     return container_of(d, VirtIOS390Device, qdev);
 394 }
 395
 396 static void virtio_s390_notify(DeviceState *d, uint16_t vector)
 397 {
 398     VirtIOS390Device *dev = to_virtio_s390_device_fast(d);
 399     uint64_t token = s390_virtio_device_vq_token(dev, vector);
 400     S390CPU *cpu = s390_cpu_addr2state(0);
 401
 402     s390_virtio_irq(cpu, 0, token);
 403 }
 404
 405 static unsigned virtio_s390_get_features(DeviceState *d)
 406 {
 407     VirtIOS390Device *dev = to_virtio_s390_device(d);
 408     return dev->host_features;
 409 }
 410
 411 /**************** S390 Virtio Bus Device Descriptions *******************/
 412
 413 static const VirtIOBindings virtio_s390_bindings = {
 414     .notify = virtio_s390_notify,
 415     .get_features = virtio_s390_get_features,
 416 };
 417
 418 static Property s390_virtio_net_properties[] = {
 419     DEFINE_NIC_PROPERTIES(VirtIOS390Device, nic),
 420     DEFINE_VIRTIO_NET_FEATURES(VirtIOS390Device, host_features),
 421     DEFINE_PROP_UINT32("x-txtimer", VirtIOS390Device,
 422                        net.txtimer, TX_TIMER_INTERVAL),
 423     DEFINE_PROP_INT32("x-txburst", VirtIOS390Device,
 424                       net.txburst, TX_BURST),
 425     DEFINE_PROP_STRING("tx", VirtIOS390Device, net.tx),
 426     DEFINE_PROP_END_OF_LIST(),
 427 };
 428
 429 static void s390_virtio_net_class_init(ObjectClass *klass, void *data)
 430 {
 431     DeviceClass *dc = DEVICE_CLASS(klass);
 432     VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
 433
 434     k->init = s390_virtio_net_init;
 435     dc->props = s390_virtio_net_properties;
 436 }
 437
 438 static const TypeInfo s390_virtio_net = {
 439     .name          = "virtio-net-s390",
 440     .parent        = TYPE_VIRTIO_S390_DEVICE,
 441     .instance_size = sizeof(VirtIOS390Device),
 442     .class_init    = s390_virtio_net_class_init,
 443 };
 444
 445 static Property s390_virtio_blk_properties[] = {
 446     DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkS390, blk),
 447     DEFINE_PROP_END_OF_LIST(),
 448 };
 449
 450 static void s390_virtio_blk_class_init(ObjectClass *klass, void *data)
 451 {
 452     DeviceClass *dc = DEVICE_CLASS(klass);
 453     VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
 454
 455     k->init = s390_virtio_blk_init;
 456     dc->props = s390_virtio_blk_properties;
 457 }
 458
 459 static const TypeInfo s390_virtio_blk = {
 460     .name          = "virtio-blk-s390",
 461     .parent        = TYPE_VIRTIO_S390_DEVICE,
 462     .instance_size = sizeof(VirtIOBlkS390),
 463     .instance_init = s390_virtio_blk_instance_init,
 464     .class_init    = s390_virtio_blk_class_init,
 465 };
 466
 467 static Property s390_virtio_serial_properties[] = {
 468     DEFINE_PROP_UINT32("max_ports", VirtIOS390Device,
 469                        serial.max_virtserial_ports, 31),
 470     DEFINE_PROP_END_OF_LIST(),
 471 };
 472
 473 static void s390_virtio_serial_class_init(ObjectClass *klass, void *data)
 474 {
 475     DeviceClass *dc = DEVICE_CLASS(klass);
 476     VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
 477
 478     k->init = s390_virtio_serial_init;
 479     dc->props = s390_virtio_serial_properties;
 480 }
 481
 482 static const TypeInfo s390_virtio_serial = {
 483     .name          = "virtio-serial-s390",
 484     .parent        = TYPE_VIRTIO_S390_DEVICE,
 485     .instance_size = sizeof(VirtIOS390Device),
 486     .class_init    = s390_virtio_serial_class_init,
 487 };
 488
 489 static void s390_virtio_rng_initfn(Object *obj)
 490 {
 491     VirtIOS390Device *dev = VIRTIO_S390_DEVICE(obj);
 492
 493     object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
 494                              (Object **)&dev->rng.rng, NULL);
 495 }
 496
 497 static void s390_virtio_rng_class_init(ObjectClass *klass, void *data)
 498 {
 499     VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
 500
 501     k->init = s390_virtio_rng_init;
 502 }
 503
 504 static const TypeInfo s390_virtio_rng = {
 505     .name          = "virtio-rng-s390",
 506     .parent        = TYPE_VIRTIO_S390_DEVICE,
 507     .instance_size = sizeof(VirtIOS390Device),
 508     .instance_init = s390_virtio_rng_initfn,
 509     .class_init    = s390_virtio_rng_class_init,
 510 };
 511
 512 static int s390_virtio_busdev_init(DeviceState *dev)
 513 {
 514     VirtIOS390Device *_dev = (VirtIOS390Device *)dev;
 515     VirtIOS390DeviceClass *_info = VIRTIO_S390_DEVICE_GET_CLASS(dev);
 516
 517     virtio_s390_bus_new(&_dev->bus, _dev);
 518
 519     return _info->init(_dev);
 520 }
 521
 522 static void s390_virtio_busdev_reset(DeviceState *dev)
 523 {
 524     VirtIOS390Device *_dev = (VirtIOS390Device *)dev;
 525
 526     virtio_reset(_dev->vdev);
 527 }
 528
 529 static void virtio_s390_device_class_init(ObjectClass *klass, void *data)
 530 {
 531     DeviceClass *dc = DEVICE_CLASS(klass);
 532
 533     dc->init = s390_virtio_busdev_init;
 534     dc->bus_type = TYPE_S390_VIRTIO_BUS;
 535     dc->unplug = qdev_simple_unplug_cb;
 536     dc->reset = s390_virtio_busdev_reset;
 537 }
 538
 539 static const TypeInfo virtio_s390_device_info = {
 540     .name = TYPE_VIRTIO_S390_DEVICE,
 541     .parent = TYPE_DEVICE,
 542     .instance_size = sizeof(VirtIOS390Device),
 543     .class_init = virtio_s390_device_class_init,
 544     .class_size = sizeof(VirtIOS390DeviceClass),
 545     .abstract = true,
 546 };
 547
 548 static Property s390_virtio_scsi_properties[] = {
 549     DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSIS390, vdev.conf),
 550     DEFINE_VIRTIO_SCSI_FEATURES(VirtIOS390Device, host_features),
 551     DEFINE_PROP_END_OF_LIST(),
 552 };
 553
 554 static void s390_virtio_scsi_class_init(ObjectClass *klass, void *data)
 555 {
 556     DeviceClass *dc = DEVICE_CLASS(klass);
 557     VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
 558
 559     k->init = s390_virtio_scsi_init;
 560     dc->props = s390_virtio_scsi_properties;
 561 }
 562
 563 static const TypeInfo s390_virtio_scsi = {
 564     .name          = TYPE_VIRTIO_SCSI_S390,
 565     .parent        = TYPE_VIRTIO_S390_DEVICE,
 566     .instance_size = sizeof(VirtIOSCSIS390),
 567     .instance_init = s390_virtio_scsi_instance_init,
 568     .class_init    = s390_virtio_scsi_class_init,
 569 };
 570
 571 /***************** S390 Virtio Bus Bridge Device *******************/
 572 /* Only required to have the virtio bus as child in the system bus */
 573
 574 static int s390_virtio_bridge_init(SysBusDevice *dev)
 575 {
 576     /* nothing */
 577     return 0;
 578 }
 579
 580 static void s390_virtio_bridge_class_init(ObjectClass *klass, void *data)
 581 {
 582     DeviceClass *dc = DEVICE_CLASS(klass);
 583     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 584
 585     k->init = s390_virtio_bridge_init;
 586     dc->no_user = 1;
 587 }
 588
 589 static const TypeInfo s390_virtio_bridge_info = {
 590     .name          = "s390-virtio-bridge",
 591     .parent        = TYPE_SYS_BUS_DEVICE,
 592     .instance_size = sizeof(SysBusDevice),
 593     .class_init    = s390_virtio_bridge_class_init,
 594 };
 595
 596 /* virtio-s390-bus */
 597
 598 void virtio_s390_bus_new(VirtioBusState *bus, VirtIOS390Device *dev)
 599 {
 600     DeviceState *qdev = DEVICE(dev);
 601     BusState *qbus;
 602     qbus_create_inplace((BusState *)bus, TYPE_VIRTIO_S390_BUS, qdev, NULL);
 603     qbus = BUS(bus);
 604     qbus->allow_hotplug = 1;
 605 }
 606
 607 static void virtio_s390_bus_class_init(ObjectClass *klass, void *data)
 608 {
 609     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
 610     BusClass *bus_class = BUS_CLASS(klass);
 611     bus_class->max_dev = 1;
 612     k->notify = virtio_s390_notify;
 613     k->get_features = virtio_s390_get_features;
 614 }
 615
 616 static const TypeInfo virtio_s390_bus_info = {
 617     .name          = TYPE_VIRTIO_S390_BUS,
 618     .parent        = TYPE_VIRTIO_BUS,
 619     .instance_size = sizeof(VirtioS390BusState),
 620     .class_init    = virtio_s390_bus_class_init,
 621 };
 622
 623 static void s390_virtio_register_types(void)
 624 {
 625     type_register_static(&virtio_s390_bus_info);
 626     type_register_static(&s390_virtio_bus_info);
 627     type_register_static(&virtio_s390_device_info);
 628     type_register_static(&s390_virtio_serial);
 629     type_register_static(&s390_virtio_blk);
 630     type_register_static(&s390_virtio_net);
 631     type_register_static(&s390_virtio_scsi);
 632     type_register_static(&s390_virtio_rng);
 633     type_register_static(&s390_virtio_bridge_info);
 634 }
 635
 636 type_init(s390_virtio_register_types)