hw/s390x/virtio-ccw.c

   1 /*
   2  * virtio ccw target implementation
   3  *
   4  * Copyright 2012,2015 IBM Corp.
   5  * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
   6  *            Pierre Morel <pmorel@linux.vnet.ibm.com>
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   9  * your option) any later version. See the COPYING file in the top-level
  10  * directory.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "qapi/error.h"
  15 #include "hw/hw.h"
  16 #include "sysemu/sysemu.h"
  17 #include "sysemu/kvm.h"
  18 #include "net/net.h"
  19 #include "hw/virtio/virtio.h"
  20 #include "hw/virtio/virtio-net.h"
  21 #include "hw/sysbus.h"
  22 #include "qemu/bitops.h"
  23 #include "qemu/error-report.h"
  24 #include "hw/virtio/virtio-access.h"
  25 #include "hw/virtio/virtio-bus.h"
  26 #include "hw/s390x/adapter.h"
  27 #include "hw/s390x/s390_flic.h"
  28
  29 #include "hw/s390x/ioinst.h"
  30 #include "hw/s390x/css.h"
  31 #include "virtio-ccw.h"
  32 #include "trace.h"
  33 #include "hw/s390x/css-bridge.h"
  34 #include "hw/s390x/s390-virtio-ccw.h"
  35
  36 #define NR_CLASSIC_INDICATOR_BITS 64
  37
  38 static int virtio_ccw_dev_post_load(void *opaque, int version_id)
  39 {
  40     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(opaque);
  41     CcwDevice *ccw_dev = CCW_DEVICE(dev);
  42     CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev);
  43
  44     ccw_dev->sch->driver_data = dev;
  45     if (ccw_dev->sch->thinint_active) {
  46         dev->routes.adapter.adapter_id = css_get_adapter_id(
  47                                          CSS_IO_ADAPTER_VIRTIO,
  48                                          dev->thinint_isc);
  49     }
  50     /* Re-fill subch_id after loading the subchannel states.*/
  51     if (ck->refill_ids) {
  52         ck->refill_ids(ccw_dev);
  53     }
  54     return 0;
  55 }
  56
  57 typedef struct VirtioCcwDeviceTmp {
  58     VirtioCcwDevice *parent;
  59     uint16_t config_vector;
  60 } VirtioCcwDeviceTmp;
  61
  62 static int virtio_ccw_dev_tmp_pre_save(void *opaque)
  63 {
  64     VirtioCcwDeviceTmp *tmp = opaque;
  65     VirtioCcwDevice *dev = tmp->parent;
  66     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
  67
  68     tmp->config_vector = vdev->config_vector;
  69
  70     return 0;
  71 }
  72
  73 static int virtio_ccw_dev_tmp_post_load(void *opaque, int version_id)
  74 {
  75     VirtioCcwDeviceTmp *tmp = opaque;
  76     VirtioCcwDevice *dev = tmp->parent;
  77     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
  78
  79     vdev->config_vector = tmp->config_vector;
  80     return 0;
  81 }
  82
  83 const VMStateDescription vmstate_virtio_ccw_dev_tmp = {
  84     .name = "s390_virtio_ccw_dev_tmp",
  85     .pre_save = virtio_ccw_dev_tmp_pre_save,
  86     .post_load = virtio_ccw_dev_tmp_post_load,
  87     .fields = (VMStateField[]) {
  88         VMSTATE_UINT16(config_vector, VirtioCcwDeviceTmp),
  89         VMSTATE_END_OF_LIST()
  90     }
  91 };
  92
  93 const VMStateDescription vmstate_virtio_ccw_dev = {
  94     .name = "s390_virtio_ccw_dev",
  95     .version_id = 1,
  96     .minimum_version_id = 1,
  97     .post_load = virtio_ccw_dev_post_load,
  98     .fields = (VMStateField[]) {
  99         VMSTATE_CCW_DEVICE(parent_obj, VirtioCcwDevice),
 100         VMSTATE_PTR_TO_IND_ADDR(indicators, VirtioCcwDevice),
 101         VMSTATE_PTR_TO_IND_ADDR(indicators2, VirtioCcwDevice),
 102         VMSTATE_PTR_TO_IND_ADDR(summary_indicator, VirtioCcwDevice),
 103         /*
 104          * Ugly hack because VirtIODevice does not migrate itself.
 105          * This also makes legacy via vmstate_save_state possible.
 106          */
 107         VMSTATE_WITH_TMP(VirtioCcwDevice, VirtioCcwDeviceTmp,
 108                          vmstate_virtio_ccw_dev_tmp),
 109         VMSTATE_STRUCT(routes, VirtioCcwDevice, 1, vmstate_adapter_routes,
 110                        AdapterRoutes),
 111         VMSTATE_UINT8(thinint_isc, VirtioCcwDevice),
 112         VMSTATE_INT32(revision, VirtioCcwDevice),
 113         VMSTATE_END_OF_LIST()
 114     }
 115 };
 116
 117 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
 118                                VirtioCcwDevice *dev);
 119
 120 VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
 121 {
 122     VirtIODevice *vdev = NULL;
 123     VirtioCcwDevice *dev = sch->driver_data;
 124
 125     if (dev) {
 126         vdev = virtio_bus_get_device(&dev->bus);
 127     }
 128     return vdev;
 129 }
 130
 131 static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
 132 {
 133     virtio_bus_start_ioeventfd(&dev->bus);
 134 }
 135
 136 static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev)
 137 {
 138     virtio_bus_stop_ioeventfd(&dev->bus);
 139 }
 140
 141 static bool virtio_ccw_ioeventfd_enabled(DeviceState *d)
 142 {
 143     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 144
 145     return (dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) != 0;
 146 }
 147
 148 static int virtio_ccw_ioeventfd_assign(DeviceState *d, EventNotifier *notifier,
 149                                        int n, bool assign)
 150 {
 151     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 152     CcwDevice *ccw_dev = CCW_DEVICE(dev);
 153     SubchDev *sch = ccw_dev->sch;
 154     uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid;
 155
 156     return s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
 157 }
 158
 159 /* Communication blocks used by several channel commands. */
 160 typedef struct VqInfoBlockLegacy {
 161     uint64_t queue;
 162     uint32_t align;
 163     uint16_t index;
 164     uint16_t num;
 165 } QEMU_PACKED VqInfoBlockLegacy;
 166
 167 typedef struct VqInfoBlock {
 168     uint64_t desc;
 169     uint32_t res0;
 170     uint16_t index;
 171     uint16_t num;
 172     uint64_t avail;
 173     uint64_t used;
 174 } QEMU_PACKED VqInfoBlock;
 175
 176 typedef struct VqConfigBlock {
 177     uint16_t index;
 178     uint16_t num_max;
 179 } QEMU_PACKED VqConfigBlock;
 180
 181 typedef struct VirtioFeatDesc {
 182     uint32_t features;
 183     uint8_t index;
 184 } QEMU_PACKED VirtioFeatDesc;
 185
 186 typedef struct VirtioThinintInfo {
 187     hwaddr summary_indicator;
 188     hwaddr device_indicator;
 189     uint64_t ind_bit;
 190     uint8_t isc;
 191 } QEMU_PACKED VirtioThinintInfo;
 192
 193 typedef struct VirtioRevInfo {
 194     uint16_t revision;
 195     uint16_t length;
 196     uint8_t data[0];
 197 } QEMU_PACKED VirtioRevInfo;
 198
 199 /* Specify where the virtqueues for the subchannel are in guest memory. */
 200 static int virtio_ccw_set_vqs(SubchDev *sch, VqInfoBlock *info,
 201                               VqInfoBlockLegacy *linfo)
 202 {
 203     VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
 204     uint16_t index = info ? info->index : linfo->index;
 205     uint16_t num = info ? info->num : linfo->num;
 206     uint64_t desc = info ? info->desc : linfo->queue;
 207
 208     if (index >= VIRTIO_QUEUE_MAX) {
 209         return -EINVAL;
 210     }
 211
 212     /* Current code in virtio.c relies on 4K alignment. */
 213     if (linfo && desc && (linfo->align != 4096)) {
 214         return -EINVAL;
 215     }
 216
 217     if (!vdev) {
 218         return -EINVAL;
 219     }
 220
 221     if (info) {
 222         virtio_queue_set_rings(vdev, index, desc, info->avail, info->used);
 223     } else {
 224         virtio_queue_set_addr(vdev, index, desc);
 225     }
 226     if (!desc) {
 227         virtio_queue_set_vector(vdev, index, VIRTIO_NO_VECTOR);
 228     } else {
 229         if (info) {
 230             /* virtio-1 allows changing the ring size. */
 231             if (virtio_queue_get_max_num(vdev, index) < num) {
 232                 /* Fail if we exceed the maximum number. */
 233                 return -EINVAL;
 234             }
 235             virtio_queue_set_num(vdev, index, num);
 236         } else if (virtio_queue_get_num(vdev, index) > num) {
 237             /* Fail if we don't have a big enough queue. */
 238             return -EINVAL;
 239         }
 240         /* We ignore possible increased num for legacy for compatibility. */
 241         virtio_queue_set_vector(vdev, index, index);
 242     }
 243     /* tell notify handler in case of config change */
 244     vdev->config_vector = VIRTIO_QUEUE_MAX;
 245     return 0;
 246 }
 247
 248 static void virtio_ccw_reset_virtio(VirtioCcwDevice *dev, VirtIODevice *vdev)
 249 {
 250     CcwDevice *ccw_dev = CCW_DEVICE(dev);
 251
 252     virtio_ccw_stop_ioeventfd(dev);
 253     virtio_reset(vdev);
 254     if (dev->indicators) {
 255         release_indicator(&dev->routes.adapter, dev->indicators);
 256         dev->indicators = NULL;
 257     }
 258     if (dev->indicators2) {
 259         release_indicator(&dev->routes.adapter, dev->indicators2);
 260         dev->indicators2 = NULL;
 261     }
 262     if (dev->summary_indicator) {
 263         release_indicator(&dev->routes.adapter, dev->summary_indicator);
 264         dev->summary_indicator = NULL;
 265     }
 266     ccw_dev->sch->thinint_active = false;
 267 }
 268
 269 static int virtio_ccw_handle_set_vq(SubchDev *sch, CCW1 ccw, bool check_len,
 270                                     bool is_legacy)
 271 {
 272     int ret;
 273     VqInfoBlock info;
 274     VqInfoBlockLegacy linfo;
 275     size_t info_len = is_legacy ? sizeof(linfo) : sizeof(info);
 276
 277     if (check_len) {
 278         if (ccw.count != info_len) {
 279             return -EINVAL;
 280         }
 281     } else if (ccw.count < info_len) {
 282         /* Can't execute command. */
 283         return -EINVAL;
 284     }
 285     if (!ccw.cda) {
 286         return -EFAULT;
 287     }
 288     if (is_legacy) {
 289         ccw_dstream_read(&sch->cds, linfo);
 290         be64_to_cpus(&linfo.queue);
 291         be32_to_cpus(&linfo.align);
 292         be16_to_cpus(&linfo.index);
 293         be16_to_cpus(&linfo.num);
 294         ret = virtio_ccw_set_vqs(sch, NULL, &linfo);
 295     } else {
 296         ccw_dstream_read(&sch->cds, info);
 297         be64_to_cpus(&info.desc);
 298         be16_to_cpus(&info.index);
 299         be16_to_cpus(&info.num);
 300         be64_to_cpus(&info.avail);
 301         be64_to_cpus(&info.used);
 302         ret = virtio_ccw_set_vqs(sch, &info, NULL);
 303     }
 304     sch->curr_status.scsw.count = 0;
 305     return ret;
 306 }
 307
 308 static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
 309 {
 310     int ret;
 311     VirtioRevInfo revinfo;
 312     uint8_t status;
 313     VirtioFeatDesc features;
 314     hwaddr indicators;
 315     VqConfigBlock vq_config;
 316     VirtioCcwDevice *dev = sch->driver_data;
 317     VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
 318     bool check_len;
 319     int len;
 320     VirtioThinintInfo thinint;
 321
 322     if (!dev) {
 323         return -EINVAL;
 324     }
 325
 326     trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid,
 327                                    ccw.cmd_code);
 328     check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
 329
 330     if (dev->force_revision_1 && dev->revision < 0 &&
 331         ccw.cmd_code != CCW_CMD_SET_VIRTIO_REV) {
 332         /*
 333          * virtio-1 drivers must start with negotiating to a revision >= 1,
 334          * so post a command reject for all other commands
 335          */
 336         return -ENOSYS;
 337     }
 338
 339     /* Look at the command. */
 340     switch (ccw.cmd_code) {
 341     case CCW_CMD_SET_VQ:
 342         ret = virtio_ccw_handle_set_vq(sch, ccw, check_len, dev->revision < 1);
 343         break;
 344     case CCW_CMD_VDEV_RESET:
 345         virtio_ccw_reset_virtio(dev, vdev);
 346         ret = 0;
 347         break;
 348     case CCW_CMD_READ_FEAT:
 349         if (check_len) {
 350             if (ccw.count != sizeof(features)) {
 351                 ret = -EINVAL;
 352                 break;
 353             }
 354         } else if (ccw.count < sizeof(features)) {
 355             /* Can't execute command. */
 356             ret = -EINVAL;
 357             break;
 358         }
 359         if (!ccw.cda) {
 360             ret = -EFAULT;
 361         } else {
 362             VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
 363
 364             ccw_dstream_advance(&sch->cds, sizeof(features.features));
 365             ccw_dstream_read(&sch->cds, features.index);
 366             if (features.index == 0) {
 367                 if (dev->revision >= 1) {
 368                     /* Don't offer legacy features for modern devices. */
 369                     features.features = (uint32_t)
 370                         (vdev->host_features & ~vdc->legacy_features);
 371                 } else {
 372                     features.features = (uint32_t)vdev->host_features;
 373                 }
 374             } else if ((features.index == 1) && (dev->revision >= 1)) {
 375                 /*
 376                  * Only offer feature bits beyond 31 if the guest has
 377                  * negotiated at least revision 1.
 378                  */
 379                 features.features = (uint32_t)(vdev->host_features >> 32);
 380             } else {
 381                 /* Return zeroes if the guest supports more feature bits. */
 382                 features.features = 0;
 383             }
 384             ccw_dstream_rewind(&sch->cds);
 385             cpu_to_le32s(&features.features);
 386             ccw_dstream_write(&sch->cds, features.features);
 387             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 388             ret = 0;
 389         }
 390         break;
 391     case CCW_CMD_WRITE_FEAT:
 392         if (check_len) {
 393             if (ccw.count != sizeof(features)) {
 394                 ret = -EINVAL;
 395                 break;
 396             }
 397         } else if (ccw.count < sizeof(features)) {
 398             /* Can't execute command. */
 399             ret = -EINVAL;
 400             break;
 401         }
 402         if (!ccw.cda) {
 403             ret = -EFAULT;
 404         } else {
 405             ccw_dstream_read(&sch->cds, features);
 406             le32_to_cpus(&features.features);
 407             if (features.index == 0) {
 408                 virtio_set_features(vdev,
 409                                     (vdev->guest_features & 0xffffffff00000000ULL) |
 410                                     features.features);
 411             } else if ((features.index == 1) && (dev->revision >= 1)) {
 412                 /*
 413                  * If the guest did not negotiate at least revision 1,
 414                  * we did not offer it any feature bits beyond 31. Such a
 415                  * guest passing us any bit here is therefore buggy.
 416                  */
 417                 virtio_set_features(vdev,
 418                                     (vdev->guest_features & 0x00000000ffffffffULL) |
 419                                     ((uint64_t)features.features << 32));
 420             } else {
 421                 /*
 422                  * If the guest supports more feature bits, assert that it
 423                  * passes us zeroes for those we don't support.
 424                  */
 425                 if (features.features) {
 426                     qemu_log_mask(LOG_GUEST_ERROR,
 427                                   "Guest bug: features[%i]=%x (expected 0)",
 428                                   features.index, features.features);
 429                     /* XXX: do a unit check here? */
 430                 }
 431             }
 432             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 433             ret = 0;
 434         }
 435         break;
 436     case CCW_CMD_READ_CONF:
 437         if (check_len) {
 438             if (ccw.count > vdev->config_len) {
 439                 ret = -EINVAL;
 440                 break;
 441             }
 442         }
 443         len = MIN(ccw.count, vdev->config_len);
 444         if (!ccw.cda) {
 445             ret = -EFAULT;
 446         } else {
 447             virtio_bus_get_vdev_config(&dev->bus, vdev->config);
 448             ccw_dstream_write_buf(&sch->cds, vdev->config, len);
 449             sch->curr_status.scsw.count = ccw.count - len;
 450             ret = 0;
 451         }
 452         break;
 453     case CCW_CMD_WRITE_CONF:
 454         if (check_len) {
 455             if (ccw.count > vdev->config_len) {
 456                 ret = -EINVAL;
 457                 break;
 458             }
 459         }
 460         len = MIN(ccw.count, vdev->config_len);
 461         if (!ccw.cda) {
 462             ret = -EFAULT;
 463         } else {
 464             ret = ccw_dstream_read_buf(&sch->cds, vdev->config, len);
 465             if (!ret) {
 466                 virtio_bus_set_vdev_config(&dev->bus, vdev->config);
 467                 sch->curr_status.scsw.count = ccw.count - len;
 468             }
 469         }
 470         break;
 471     case CCW_CMD_READ_STATUS:
 472         if (check_len) {
 473             if (ccw.count != sizeof(status)) {
 474                 ret = -EINVAL;
 475                 break;
 476             }
 477         } else if (ccw.count < sizeof(status)) {
 478             /* Can't execute command. */
 479             ret = -EINVAL;
 480             break;
 481         }
 482         if (!ccw.cda) {
 483             ret = -EFAULT;
 484         } else {
 485             address_space_stb(&address_space_memory, ccw.cda, vdev->status,
 486                                         MEMTXATTRS_UNSPECIFIED, NULL);
 487             sch->curr_status.scsw.count = ccw.count - sizeof(vdev->status);
 488             ret = 0;
 489         }
 490         break;
 491     case CCW_CMD_WRITE_STATUS:
 492         if (check_len) {
 493             if (ccw.count != sizeof(status)) {
 494                 ret = -EINVAL;
 495                 break;
 496             }
 497         } else if (ccw.count < sizeof(status)) {
 498             /* Can't execute command. */
 499             ret = -EINVAL;
 500             break;
 501         }
 502         if (!ccw.cda) {
 503             ret = -EFAULT;
 504         } else {
 505             ccw_dstream_read(&sch->cds, status);
 506             if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
 507                 virtio_ccw_stop_ioeventfd(dev);
 508             }
 509             if (virtio_set_status(vdev, status) == 0) {
 510                 if (vdev->status == 0) {
 511                     virtio_ccw_reset_virtio(dev, vdev);
 512                 }
 513                 if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
 514                     virtio_ccw_start_ioeventfd(dev);
 515                 }
 516                 sch->curr_status.scsw.count = ccw.count - sizeof(status);
 517                 ret = 0;
 518             } else {
 519                 /* Trigger a command reject. */
 520                 ret = -ENOSYS;
 521             }
 522         }
 523         break;
 524     case CCW_CMD_SET_IND:
 525         if (check_len) {
 526             if (ccw.count != sizeof(indicators)) {
 527                 ret = -EINVAL;
 528                 break;
 529             }
 530         } else if (ccw.count < sizeof(indicators)) {
 531             /* Can't execute command. */
 532             ret = -EINVAL;
 533             break;
 534         }
 535         if (sch->thinint_active) {
 536             /* Trigger a command reject. */
 537             ret = -ENOSYS;
 538             break;
 539         }
 540         if (virtio_get_num_queues(vdev) > NR_CLASSIC_INDICATOR_BITS) {
 541             /* More queues than indicator bits --> trigger a reject */
 542             ret = -ENOSYS;
 543             break;
 544         }
 545         if (!ccw.cda) {
 546             ret = -EFAULT;
 547         } else {
 548             ccw_dstream_read(&sch->cds, indicators);
 549             be64_to_cpus(&indicators);
 550             dev->indicators = get_indicator(indicators, sizeof(uint64_t));
 551             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 552             ret = 0;
 553         }
 554         break;
 555     case CCW_CMD_SET_CONF_IND:
 556         if (check_len) {
 557             if (ccw.count != sizeof(indicators)) {
 558                 ret = -EINVAL;
 559                 break;
 560             }
 561         } else if (ccw.count < sizeof(indicators)) {
 562             /* Can't execute command. */
 563             ret = -EINVAL;
 564             break;
 565         }
 566         if (!ccw.cda) {
 567             ret = -EFAULT;
 568         } else {
 569             ccw_dstream_read(&sch->cds, indicators);
 570             be64_to_cpus(&indicators);
 571             dev->indicators2 = get_indicator(indicators, sizeof(uint64_t));
 572             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 573             ret = 0;
 574         }
 575         break;
 576     case CCW_CMD_READ_VQ_CONF:
 577         if (check_len) {
 578             if (ccw.count != sizeof(vq_config)) {
 579                 ret = -EINVAL;
 580                 break;
 581             }
 582         } else if (ccw.count < sizeof(vq_config)) {
 583             /* Can't execute command. */
 584             ret = -EINVAL;
 585             break;
 586         }
 587         if (!ccw.cda) {
 588             ret = -EFAULT;
 589         } else {
 590             ccw_dstream_read(&sch->cds, vq_config.index);
 591             be16_to_cpus(&vq_config.index);
 592             if (vq_config.index >= VIRTIO_QUEUE_MAX) {
 593                 ret = -EINVAL;
 594                 break;
 595             }
 596             vq_config.num_max = virtio_queue_get_num(vdev,
 597                                                      vq_config.index);
 598             cpu_to_be16s(&vq_config.num_max);
 599             ccw_dstream_write(&sch->cds, vq_config.num_max);
 600             sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
 601             ret = 0;
 602         }
 603         break;
 604     case CCW_CMD_SET_IND_ADAPTER:
 605         if (check_len) {
 606             if (ccw.count != sizeof(thinint)) {
 607                 ret = -EINVAL;
 608                 break;
 609             }
 610         } else if (ccw.count < sizeof(thinint)) {
 611             /* Can't execute command. */
 612             ret = -EINVAL;
 613             break;
 614         }
 615         if (!ccw.cda) {
 616             ret = -EFAULT;
 617         } else if (dev->indicators && !sch->thinint_active) {
 618             /* Trigger a command reject. */
 619             ret = -ENOSYS;
 620         } else {
 621             if (ccw_dstream_read(&sch->cds, thinint)) {
 622                 ret = -EFAULT;
 623             } else {
 624                 be64_to_cpus(&thinint.ind_bit);
 625                 be64_to_cpus(&thinint.summary_indicator);
 626                 be64_to_cpus(&thinint.device_indicator);
 627
 628                 dev->summary_indicator =
 629                     get_indicator(thinint.summary_indicator, sizeof(uint8_t));
 630                 dev->indicators =
 631                     get_indicator(thinint.device_indicator,
 632                                   thinint.ind_bit / 8 + 1);
 633                 dev->thinint_isc = thinint.isc;
 634                 dev->routes.adapter.ind_offset = thinint.ind_bit;
 635                 dev->routes.adapter.summary_offset = 7;
 636                 dev->routes.adapter.adapter_id = css_get_adapter_id(
 637                                                  CSS_IO_ADAPTER_VIRTIO,
 638                                                  dev->thinint_isc);
 639                 sch->thinint_active = ((dev->indicators != NULL) &&
 640                                        (dev->summary_indicator != NULL));
 641                 sch->curr_status.scsw.count = ccw.count - sizeof(thinint);
 642                 ret = 0;
 643             }
 644         }
 645         break;
 646     case CCW_CMD_SET_VIRTIO_REV:
 647         len = sizeof(revinfo);
 648         if (ccw.count < len) {
 649             ret = -EINVAL;
 650             break;
 651         }
 652         if (!ccw.cda) {
 653             ret = -EFAULT;
 654             break;
 655         }
 656         ccw_dstream_read_buf(&sch->cds, &revinfo, 4);
 657         be16_to_cpus(&revinfo.revision);
 658         be16_to_cpus(&revinfo.length);
 659         if (ccw.count < len + revinfo.length ||
 660             (check_len && ccw.count > len + revinfo.length)) {
 661             ret = -EINVAL;
 662             break;
 663         }
 664         /*
 665          * Once we start to support revisions with additional data, we'll
 666          * need to fetch it here. Nothing to do for now, though.
 667          */
 668         if (dev->revision >= 0 ||
 669             revinfo.revision > virtio_ccw_rev_max(dev) ||
 670             (dev->force_revision_1 && !revinfo.revision)) {
 671             ret = -ENOSYS;
 672             break;
 673         }
 674         ret = 0;
 675         dev->revision = revinfo.revision;
 676         break;
 677     default:
 678         ret = -ENOSYS;
 679         break;
 680     }
 681     return ret;
 682 }
 683
 684 static void virtio_sch_disable_cb(SubchDev *sch)
 685 {
 686     VirtioCcwDevice *dev = sch->driver_data;
 687
 688     dev->revision = -1;
 689 }
 690
 691 static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp)
 692 {
 693     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
 694     CcwDevice *ccw_dev = CCW_DEVICE(dev);
 695     CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev);
 696     SubchDev *sch;
 697     Error *err = NULL;
 698
 699     sch = css_create_sch(ccw_dev->devno, errp);
 700     if (!sch) {
 701         return;
 702     }
 703     if (!virtio_ccw_rev_max(dev) && dev->force_revision_1) {
 704         error_setg(&err, "Invalid value of property max_rev "
 705                    "(is %d expected >= 1)", virtio_ccw_rev_max(dev));
 706         goto out_err;
 707     }
 708
 709     sch->driver_data = dev;
 710     sch->ccw_cb = virtio_ccw_cb;
 711     sch->disable_cb = virtio_sch_disable_cb;
 712     sch->id.reserved = 0xff;
 713     sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
 714     sch->do_subchannel_work = do_subchannel_work_virtual;
 715     ccw_dev->sch = sch;
 716     dev->indicators = NULL;
 717     dev->revision = -1;
 718     css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
 719
 720     trace_virtio_ccw_new_device(
 721         sch->cssid, sch->ssid, sch->schid, sch->devno,
 722         ccw_dev->devno.valid ? "user-configured" : "auto-configured");
 723
 724     if (kvm_enabled() && !kvm_eventfds_enabled()) {
 725         dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
 726     }
 727
 728     if (k->realize) {
 729         k->realize(dev, &err);
 730         if (err) {
 731             goto out_err;
 732         }
 733     }
 734
 735     ck->realize(ccw_dev, &err);
 736     if (err) {
 737         goto out_err;
 738     }
 739
 740     return;
 741
 742 out_err:
 743     error_propagate(errp, err);
 744     css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
 745     ccw_dev->sch = NULL;
 746     g_free(sch);
 747 }
 748
 749 static void virtio_ccw_device_unrealize(VirtioCcwDevice *dev, Error **errp)
 750 {
 751     VirtIOCCWDeviceClass *dc = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
 752     CcwDevice *ccw_dev = CCW_DEVICE(dev);
 753     SubchDev *sch = ccw_dev->sch;
 754
 755     if (dc->unrealize) {
 756         dc->unrealize(dev, errp);
 757     }
 758
 759     if (sch) {
 760         css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
 761         g_free(sch);
 762         ccw_dev->sch = NULL;
 763     }
 764     if (dev->indicators) {
 765         release_indicator(&dev->routes.adapter, dev->indicators);
 766         dev->indicators = NULL;
 767     }
 768 }
 769
 770 /* DeviceState to VirtioCcwDevice. Note: used on datapath,
 771  * be careful and test performance if you change this.
 772  */
 773 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
 774 {
 775     CcwDevice *ccw_dev = to_ccw_dev_fast(d);
 776
 777     return container_of(ccw_dev, VirtioCcwDevice, parent_obj);
 778 }
 779
 780 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc,
 781                                      uint8_t to_be_set)
 782 {
 783     uint8_t ind_old, ind_new;
 784     hwaddr len = 1;
 785     uint8_t *ind_addr;
 786
 787     ind_addr = cpu_physical_memory_map(ind_loc, &len, 1);
 788     if (!ind_addr) {
 789         error_report("%s(%x.%x.%04x): unable to access indicator",
 790                      __func__, sch->cssid, sch->ssid, sch->schid);
 791         return -1;
 792     }
 793     do {
 794         ind_old = *ind_addr;
 795         ind_new = ind_old | to_be_set;
 796     } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old);
 797     trace_virtio_ccw_set_ind(ind_loc, ind_old, ind_new);
 798     cpu_physical_memory_unmap(ind_addr, len, 1, len);
 799
 800     return ind_old;
 801 }
 802
 803 static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
 804 {
 805     VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
 806     CcwDevice *ccw_dev = to_ccw_dev_fast(d);
 807     SubchDev *sch = ccw_dev->sch;
 808     uint64_t indicators;
 809
 810     if (vector == VIRTIO_NO_VECTOR) {
 811         return;
 812     }
 813     /*
 814      * vector < VIRTIO_QUEUE_MAX: notification for a virtqueue
 815      * vector == VIRTIO_QUEUE_MAX: configuration change notification
 816      * bits beyond that are unused and should never be notified for
 817      */
 818     assert(vector <= VIRTIO_QUEUE_MAX);
 819
 820     if (vector < VIRTIO_QUEUE_MAX) {
 821         if (!dev->indicators) {
 822             return;
 823         }
 824         if (sch->thinint_active) {
 825             /*
 826              * In the adapter interrupt case, indicators points to a
 827              * memory area that may be (way) larger than 64 bit and
 828              * ind_bit indicates the start of the indicators in a big
 829              * endian notation.
 830              */
 831             uint64_t ind_bit = dev->routes.adapter.ind_offset;
 832
 833             virtio_set_ind_atomic(sch, dev->indicators->addr +
 834                                   (ind_bit + vector) / 8,
 835                                   0x80 >> ((ind_bit + vector) % 8));
 836             if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr,
 837                                        0x01)) {
 838                 css_adapter_interrupt(CSS_IO_ADAPTER_VIRTIO, dev->thinint_isc);
 839             }
 840         } else {
 841             assert(vector < NR_CLASSIC_INDICATOR_BITS);
 842             indicators = address_space_ldq(&address_space_memory,
 843                                            dev->indicators->addr,
 844                                            MEMTXATTRS_UNSPECIFIED,
 845                                            NULL);
 846             indicators |= 1ULL << vector;
 847             address_space_stq(&address_space_memory, dev->indicators->addr,
 848                               indicators, MEMTXATTRS_UNSPECIFIED, NULL);
 849             css_conditional_io_interrupt(sch);
 850         }
 851     } else {
 852         if (!dev->indicators2) {
 853             return;
 854         }
 855         indicators = address_space_ldq(&address_space_memory,
 856                                        dev->indicators2->addr,
 857                                        MEMTXATTRS_UNSPECIFIED,
 858                                        NULL);
 859         indicators |= 1ULL;
 860         address_space_stq(&address_space_memory, dev->indicators2->addr,
 861                           indicators, MEMTXATTRS_UNSPECIFIED, NULL);
 862         css_conditional_io_interrupt(sch);
 863     }
 864 }
 865
 866 static void virtio_ccw_reset(DeviceState *d)
 867 {
 868     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 869     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 870     VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
 871
 872     virtio_ccw_reset_virtio(dev, vdev);
 873     if (vdc->parent_reset) {
 874         vdc->parent_reset(d);
 875     }
 876 }
 877
 878 static void virtio_ccw_vmstate_change(DeviceState *d, bool running)
 879 {
 880     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 881
 882     if (running) {
 883         virtio_ccw_start_ioeventfd(dev);
 884     } else {
 885         virtio_ccw_stop_ioeventfd(dev);
 886     }
 887 }
 888
 889 static bool virtio_ccw_query_guest_notifiers(DeviceState *d)
 890 {
 891     CcwDevice *dev = CCW_DEVICE(d);
 892
 893     return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA);
 894 }
 895
 896 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev)
 897 {
 898     int r;
 899     CcwDevice *ccw_dev = CCW_DEVICE(dev);
 900
 901     if (!ccw_dev->sch->thinint_active) {
 902         return -EINVAL;
 903     }
 904
 905     r = map_indicator(&dev->routes.adapter, dev->summary_indicator);
 906     if (r) {
 907         return r;
 908     }
 909     r = map_indicator(&dev->routes.adapter, dev->indicators);
 910     if (r) {
 911         return r;
 912     }
 913     dev->routes.adapter.summary_addr = dev->summary_indicator->map;
 914     dev->routes.adapter.ind_addr = dev->indicators->map;
 915
 916     return 0;
 917 }
 918
 919 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs)
 920 {
 921     int i;
 922     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 923     int ret;
 924     S390FLICState *fs = s390_get_flic();
 925     S390FLICStateClass *fsc = s390_get_flic_class(fs);
 926
 927     ret = virtio_ccw_get_mappings(dev);
 928     if (ret) {
 929         return ret;
 930     }
 931     for (i = 0; i < nvqs; i++) {
 932         if (!virtio_queue_get_num(vdev, i)) {
 933             break;
 934         }
 935     }
 936     dev->routes.num_routes = i;
 937     return fsc->add_adapter_routes(fs, &dev->routes);
 938 }
 939
 940 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs)
 941 {
 942     S390FLICState *fs = s390_get_flic();
 943     S390FLICStateClass *fsc = s390_get_flic_class(fs);
 944
 945     fsc->release_adapter_routes(fs, &dev->routes);
 946 }
 947
 948 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n)
 949 {
 950     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 951     VirtQueue *vq = virtio_get_queue(vdev, n);
 952     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 953
 954     return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, notifier, NULL,
 955                                               dev->routes.gsi[n]);
 956 }
 957
 958 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n)
 959 {
 960     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 961     VirtQueue *vq = virtio_get_queue(vdev, n);
 962     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 963     int ret;
 964
 965     ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, notifier,
 966                                                 dev->routes.gsi[n]);
 967     assert(ret == 0);
 968 }
 969
 970 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
 971                                          bool assign, bool with_irqfd)
 972 {
 973     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 974     VirtQueue *vq = virtio_get_queue(vdev, n);
 975     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 976     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 977
 978     if (assign) {
 979         int r = event_notifier_init(notifier, 0);
 980
 981         if (r < 0) {
 982             return r;
 983         }
 984         virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
 985         if (with_irqfd) {
 986             r = virtio_ccw_add_irqfd(dev, n);
 987             if (r) {
 988                 virtio_queue_set_guest_notifier_fd_handler(vq, false,
 989                                                            with_irqfd);
 990                 return r;
 991             }
 992         }
 993         /*
 994          * We do not support individual masking for channel devices, so we
 995          * need to manually trigger any guest masking callbacks here.
 996          */
 997         if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) {
 998             k->guest_notifier_mask(vdev, n, false);
 999         }
1000         /* get lost events and re-inject */
1001         if (k->guest_notifier_pending &&
1002             k->guest_notifier_pending(vdev, n)) {
1003             event_notifier_set(notifier);
1004         }
1005     } else {
1006         if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) {
1007             k->guest_notifier_mask(vdev, n, true);
1008         }
1009         if (with_irqfd) {
1010             virtio_ccw_remove_irqfd(dev, n);
1011         }
1012         virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
1013         event_notifier_cleanup(notifier);
1014     }
1015     return 0;
1016 }
1017
1018 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
1019                                           bool assigned)
1020 {
1021     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1022     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1023     CcwDevice *ccw_dev = CCW_DEVICE(d);
1024     bool with_irqfd = ccw_dev->sch->thinint_active && kvm_irqfds_enabled();
1025     int r, n;
1026
1027     if (with_irqfd && assigned) {
1028         /* irq routes need to be set up before assigning irqfds */
1029         r = virtio_ccw_setup_irqroutes(dev, nvqs);
1030         if (r < 0) {
1031             goto irqroute_error;
1032         }
1033     }
1034     for (n = 0; n < nvqs; n++) {
1035         if (!virtio_queue_get_num(vdev, n)) {
1036             break;
1037         }
1038         r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd);
1039         if (r < 0) {
1040             goto assign_error;
1041         }
1042     }
1043     if (with_irqfd && !assigned) {
1044         /* release irq routes after irqfds have been released */
1045         virtio_ccw_release_irqroutes(dev, nvqs);
1046     }
1047     return 0;
1048
1049 assign_error:
1050     while (--n >= 0) {
1051         virtio_ccw_set_guest_notifier(dev, n, !assigned, false);
1052     }
1053 irqroute_error:
1054     if (with_irqfd && assigned) {
1055         virtio_ccw_release_irqroutes(dev, nvqs);
1056     }
1057     return r;
1058 }
1059
1060 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f)
1061 {
1062     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1063     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1064
1065     qemu_put_be16(f, virtio_queue_vector(vdev, n));
1066 }
1067
1068 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f)
1069 {
1070     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1071     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1072     uint16_t vector;
1073
1074     qemu_get_be16s(f, &vector);
1075     virtio_queue_set_vector(vdev, n , vector);
1076
1077     return 0;
1078 }
1079
1080 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f)
1081 {
1082     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1083     vmstate_save_state(f, &vmstate_virtio_ccw_dev, dev, NULL);
1084 }
1085
1086 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f)
1087 {
1088     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1089     return vmstate_load_state(f, &vmstate_virtio_ccw_dev, dev, 1);
1090 }
1091
1092 static void virtio_ccw_pre_plugged(DeviceState *d, Error **errp)
1093 {
1094    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1095    VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1096
1097     if (dev->max_rev >= 1) {
1098         virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1099     }
1100 }
1101
1102 /* This is called by virtio-bus just after the device is plugged. */
1103 static void virtio_ccw_device_plugged(DeviceState *d, Error **errp)
1104 {
1105     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1106     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1107     CcwDevice *ccw_dev = CCW_DEVICE(d);
1108     SubchDev *sch = ccw_dev->sch;
1109     int n = virtio_get_num_queues(vdev);
1110     S390FLICState *flic = s390_get_flic();
1111
1112     if (!virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) {
1113         dev->max_rev = 0;
1114     }
1115
1116     if (virtio_get_num_queues(vdev) > VIRTIO_QUEUE_MAX) {
1117         error_setg(errp, "The number of virtqueues %d "
1118                    "exceeds virtio limit %d", n,
1119                    VIRTIO_QUEUE_MAX);
1120         return;
1121     }
1122     if (virtio_get_num_queues(vdev) > flic->adapter_routes_max_batch) {
1123         error_setg(errp, "The number of virtqueues %d "
1124                    "exceeds flic adapter route limit %d", n,
1125                    flic->adapter_routes_max_batch);
1126         return;
1127     }
1128
1129     sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus);
1130
1131
1132     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
1133                           d->hotplugged, 1);
1134 }
1135
1136 static void virtio_ccw_device_unplugged(DeviceState *d)
1137 {
1138     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1139
1140     virtio_ccw_stop_ioeventfd(dev);
1141 }
1142 /**************** Virtio-ccw Bus Device Descriptions *******************/
1143
1144 static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp)
1145 {
1146     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1147
1148     virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev);
1149     virtio_ccw_device_realize(_dev, errp);
1150 }
1151
1152 static void virtio_ccw_busdev_unrealize(DeviceState *dev, Error **errp)
1153 {
1154     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1155
1156     virtio_ccw_device_unrealize(_dev, errp);
1157 }
1158
1159 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev,
1160                                      DeviceState *dev, Error **errp)
1161 {
1162     VirtioCcwDevice *_dev = to_virtio_ccw_dev_fast(dev);
1163
1164     virtio_ccw_stop_ioeventfd(_dev);
1165 }
1166
1167 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
1168 {
1169     DeviceClass *dc = DEVICE_CLASS(klass);
1170     CCWDeviceClass *k = CCW_DEVICE_CLASS(dc);
1171     VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_CLASS(klass);
1172
1173     k->unplug = virtio_ccw_busdev_unplug;
1174     dc->realize = virtio_ccw_busdev_realize;
1175     dc->unrealize = virtio_ccw_busdev_unrealize;
1176     dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
1177     device_class_set_parent_reset(dc, virtio_ccw_reset, &vdc->parent_reset);
1178 }
1179
1180 static const TypeInfo virtio_ccw_device_info = {
1181     .name = TYPE_VIRTIO_CCW_DEVICE,
1182     .parent = TYPE_CCW_DEVICE,
1183     .instance_size = sizeof(VirtioCcwDevice),
1184     .class_init = virtio_ccw_device_class_init,
1185     .class_size = sizeof(VirtIOCCWDeviceClass),
1186     .abstract = true,
1187 };
1188
1189 /* virtio-ccw-bus */
1190
1191 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
1192                                VirtioCcwDevice *dev)
1193 {
1194     DeviceState *qdev = DEVICE(dev);
1195     char virtio_bus_name[] = "virtio-bus";
1196
1197     qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS,
1198                         qdev, virtio_bus_name);
1199 }
1200
1201 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
1202 {
1203     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1204     BusClass *bus_class = BUS_CLASS(klass);
1205
1206     bus_class->max_dev = 1;
1207     k->notify = virtio_ccw_notify;
1208     k->vmstate_change = virtio_ccw_vmstate_change;
1209     k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
1210     k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
1211     k->save_queue = virtio_ccw_save_queue;
1212     k->load_queue = virtio_ccw_load_queue;
1213     k->save_config = virtio_ccw_save_config;
1214     k->load_config = virtio_ccw_load_config;
1215     k->pre_plugged = virtio_ccw_pre_plugged;
1216     k->device_plugged = virtio_ccw_device_plugged;
1217     k->device_unplugged = virtio_ccw_device_unplugged;
1218     k->ioeventfd_enabled = virtio_ccw_ioeventfd_enabled;
1219     k->ioeventfd_assign = virtio_ccw_ioeventfd_assign;
1220 }
1221
1222 static const TypeInfo virtio_ccw_bus_info = {
1223     .name = TYPE_VIRTIO_CCW_BUS,
1224     .parent = TYPE_VIRTIO_BUS,
1225     .instance_size = sizeof(VirtioCcwBusState),
1226     .class_init = virtio_ccw_bus_class_init,
1227 };
1228
1229 static void virtio_ccw_register(void)
1230 {
1231     type_register_static(&virtio_ccw_bus_info);
1232     type_register_static(&virtio_ccw_device_info);
1233 }
1234
1235 type_init(virtio_ccw_register)