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 "sysemu/kvm.h"
  16 #include "net/net.h"
  17 #include "hw/virtio/virtio.h"
  18 #include "migration/qemu-file-types.h"
  19 #include "hw/virtio/virtio-net.h"
  20 #include "hw/sysbus.h"
  21 #include "qemu/bitops.h"
  22 #include "qemu/error-report.h"
  23 #include "qemu/module.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         linfo.queue = be64_to_cpu(linfo.queue);
 291         linfo.align = be32_to_cpu(linfo.align);
 292         linfo.index = be16_to_cpu(linfo.index);
 293         linfo.num = be16_to_cpu(linfo.num);
 294         ret = virtio_ccw_set_vqs(sch, NULL, &linfo);
 295     } else {
 296         ccw_dstream_read(&sch->cds, info);
 297         info.desc = be64_to_cpu(info.desc);
 298         info.index = be16_to_cpu(info.index);
 299         info.num = be16_to_cpu(info.num);
 300         info.avail = be64_to_cpu(info.avail);
 301         info.used = be64_to_cpu(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             features.features = cpu_to_le32(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             features.features = le32_to_cpu(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             indicators = be64_to_cpu(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             indicators = be64_to_cpu(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             vq_config.index = be16_to_cpu(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             vq_config.num_max = cpu_to_be16(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                 thinint.ind_bit = be64_to_cpu(thinint.ind_bit);
 625                 thinint.summary_indicator =
 626                     be64_to_cpu(thinint.summary_indicator);
 627                 thinint.device_indicator =
 628                     be64_to_cpu(thinint.device_indicator);
 629
 630                 dev->summary_indicator =
 631                     get_indicator(thinint.summary_indicator, sizeof(uint8_t));
 632                 dev->indicators =
 633                     get_indicator(thinint.device_indicator,
 634                                   thinint.ind_bit / 8 + 1);
 635                 dev->thinint_isc = thinint.isc;
 636                 dev->routes.adapter.ind_offset = thinint.ind_bit;
 637                 dev->routes.adapter.summary_offset = 7;
 638                 dev->routes.adapter.adapter_id = css_get_adapter_id(
 639                                                  CSS_IO_ADAPTER_VIRTIO,
 640                                                  dev->thinint_isc);
 641                 sch->thinint_active = ((dev->indicators != NULL) &&
 642                                        (dev->summary_indicator != NULL));
 643                 sch->curr_status.scsw.count = ccw.count - sizeof(thinint);
 644                 ret = 0;
 645             }
 646         }
 647         break;
 648     case CCW_CMD_SET_VIRTIO_REV:
 649         len = sizeof(revinfo);
 650         if (ccw.count < len) {
 651             ret = -EINVAL;
 652             break;
 653         }
 654         if (!ccw.cda) {
 655             ret = -EFAULT;
 656             break;
 657         }
 658         ccw_dstream_read_buf(&sch->cds, &revinfo, 4);
 659         revinfo.revision = be16_to_cpu(revinfo.revision);
 660         revinfo.length = be16_to_cpu(revinfo.length);
 661         if (ccw.count < len + revinfo.length ||
 662             (check_len && ccw.count > len + revinfo.length)) {
 663             ret = -EINVAL;
 664             break;
 665         }
 666         /*
 667          * Once we start to support revisions with additional data, we'll
 668          * need to fetch it here. Nothing to do for now, though.
 669          */
 670         if (dev->revision >= 0 ||
 671             revinfo.revision > virtio_ccw_rev_max(dev) ||
 672             (dev->force_revision_1 && !revinfo.revision)) {
 673             ret = -ENOSYS;
 674             break;
 675         }
 676         ret = 0;
 677         dev->revision = revinfo.revision;
 678         break;
 679     default:
 680         ret = -ENOSYS;
 681         break;
 682     }
 683     return ret;
 684 }
 685
 686 static void virtio_sch_disable_cb(SubchDev *sch)
 687 {
 688     VirtioCcwDevice *dev = sch->driver_data;
 689
 690     dev->revision = -1;
 691 }
 692
 693 static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp)
 694 {
 695     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
 696     CcwDevice *ccw_dev = CCW_DEVICE(dev);
 697     CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev);
 698     SubchDev *sch;
 699     Error *err = NULL;
 700
 701     sch = css_create_sch(ccw_dev->devno, errp);
 702     if (!sch) {
 703         return;
 704     }
 705     if (!virtio_ccw_rev_max(dev) && dev->force_revision_1) {
 706         error_setg(&err, "Invalid value of property max_rev "
 707                    "(is %d expected >= 1)", virtio_ccw_rev_max(dev));
 708         goto out_err;
 709     }
 710
 711     sch->driver_data = dev;
 712     sch->ccw_cb = virtio_ccw_cb;
 713     sch->disable_cb = virtio_sch_disable_cb;
 714     sch->id.reserved = 0xff;
 715     sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
 716     sch->do_subchannel_work = do_subchannel_work_virtual;
 717     ccw_dev->sch = sch;
 718     dev->indicators = NULL;
 719     dev->revision = -1;
 720     css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
 721
 722     trace_virtio_ccw_new_device(
 723         sch->cssid, sch->ssid, sch->schid, sch->devno,
 724         ccw_dev->devno.valid ? "user-configured" : "auto-configured");
 725
 726     if (kvm_enabled() && !kvm_eventfds_enabled()) {
 727         dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
 728     }
 729
 730     if (k->realize) {
 731         k->realize(dev, &err);
 732         if (err) {
 733             goto out_err;
 734         }
 735     }
 736
 737     ck->realize(ccw_dev, &err);
 738     if (err) {
 739         goto out_err;
 740     }
 741
 742     return;
 743
 744 out_err:
 745     error_propagate(errp, err);
 746     css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
 747     ccw_dev->sch = NULL;
 748     g_free(sch);
 749 }
 750
 751 static void virtio_ccw_device_unrealize(VirtioCcwDevice *dev, Error **errp)
 752 {
 753     VirtIOCCWDeviceClass *dc = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
 754     CcwDevice *ccw_dev = CCW_DEVICE(dev);
 755     SubchDev *sch = ccw_dev->sch;
 756
 757     if (dc->unrealize) {
 758         dc->unrealize(dev, errp);
 759     }
 760
 761     if (sch) {
 762         css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
 763         g_free(sch);
 764         ccw_dev->sch = NULL;
 765     }
 766     if (dev->indicators) {
 767         release_indicator(&dev->routes.adapter, dev->indicators);
 768         dev->indicators = NULL;
 769     }
 770 }
 771
 772 /* DeviceState to VirtioCcwDevice. Note: used on datapath,
 773  * be careful and test performance if you change this.
 774  */
 775 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
 776 {
 777     CcwDevice *ccw_dev = to_ccw_dev_fast(d);
 778
 779     return container_of(ccw_dev, VirtioCcwDevice, parent_obj);
 780 }
 781
 782 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc,
 783                                      uint8_t to_be_set)
 784 {
 785     uint8_t ind_old, ind_new;
 786     hwaddr len = 1;
 787     uint8_t *ind_addr;
 788
 789     ind_addr = cpu_physical_memory_map(ind_loc, &len, 1);
 790     if (!ind_addr) {
 791         error_report("%s(%x.%x.%04x): unable to access indicator",
 792                      __func__, sch->cssid, sch->ssid, sch->schid);
 793         return -1;
 794     }
 795     do {
 796         ind_old = *ind_addr;
 797         ind_new = ind_old | to_be_set;
 798     } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old);
 799     trace_virtio_ccw_set_ind(ind_loc, ind_old, ind_new);
 800     cpu_physical_memory_unmap(ind_addr, len, 1, len);
 801
 802     return ind_old;
 803 }
 804
 805 static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
 806 {
 807     VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
 808     CcwDevice *ccw_dev = to_ccw_dev_fast(d);
 809     SubchDev *sch = ccw_dev->sch;
 810     uint64_t indicators;
 811
 812     if (vector == VIRTIO_NO_VECTOR) {
 813         return;
 814     }
 815     /*
 816      * vector < VIRTIO_QUEUE_MAX: notification for a virtqueue
 817      * vector == VIRTIO_QUEUE_MAX: configuration change notification
 818      * bits beyond that are unused and should never be notified for
 819      */
 820     assert(vector <= VIRTIO_QUEUE_MAX);
 821
 822     if (vector < VIRTIO_QUEUE_MAX) {
 823         if (!dev->indicators) {
 824             return;
 825         }
 826         if (sch->thinint_active) {
 827             /*
 828              * In the adapter interrupt case, indicators points to a
 829              * memory area that may be (way) larger than 64 bit and
 830              * ind_bit indicates the start of the indicators in a big
 831              * endian notation.
 832              */
 833             uint64_t ind_bit = dev->routes.adapter.ind_offset;
 834
 835             virtio_set_ind_atomic(sch, dev->indicators->addr +
 836                                   (ind_bit + vector) / 8,
 837                                   0x80 >> ((ind_bit + vector) % 8));
 838             if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr,
 839                                        0x01)) {
 840                 css_adapter_interrupt(CSS_IO_ADAPTER_VIRTIO, dev->thinint_isc);
 841             }
 842         } else {
 843             assert(vector < NR_CLASSIC_INDICATOR_BITS);
 844             indicators = address_space_ldq(&address_space_memory,
 845                                            dev->indicators->addr,
 846                                            MEMTXATTRS_UNSPECIFIED,
 847                                            NULL);
 848             indicators |= 1ULL << vector;
 849             address_space_stq(&address_space_memory, dev->indicators->addr,
 850                               indicators, MEMTXATTRS_UNSPECIFIED, NULL);
 851             css_conditional_io_interrupt(sch);
 852         }
 853     } else {
 854         if (!dev->indicators2) {
 855             return;
 856         }
 857         indicators = address_space_ldq(&address_space_memory,
 858                                        dev->indicators2->addr,
 859                                        MEMTXATTRS_UNSPECIFIED,
 860                                        NULL);
 861         indicators |= 1ULL;
 862         address_space_stq(&address_space_memory, dev->indicators2->addr,
 863                           indicators, MEMTXATTRS_UNSPECIFIED, NULL);
 864         css_conditional_io_interrupt(sch);
 865     }
 866 }
 867
 868 static void virtio_ccw_reset(DeviceState *d)
 869 {
 870     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 871     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 872     VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
 873
 874     virtio_ccw_reset_virtio(dev, vdev);
 875     if (vdc->parent_reset) {
 876         vdc->parent_reset(d);
 877     }
 878 }
 879
 880 static void virtio_ccw_vmstate_change(DeviceState *d, bool running)
 881 {
 882     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 883
 884     if (running) {
 885         virtio_ccw_start_ioeventfd(dev);
 886     } else {
 887         virtio_ccw_stop_ioeventfd(dev);
 888     }
 889 }
 890
 891 static bool virtio_ccw_query_guest_notifiers(DeviceState *d)
 892 {
 893     CcwDevice *dev = CCW_DEVICE(d);
 894
 895     return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA);
 896 }
 897
 898 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev)
 899 {
 900     int r;
 901     CcwDevice *ccw_dev = CCW_DEVICE(dev);
 902
 903     if (!ccw_dev->sch->thinint_active) {
 904         return -EINVAL;
 905     }
 906
 907     r = map_indicator(&dev->routes.adapter, dev->summary_indicator);
 908     if (r) {
 909         return r;
 910     }
 911     r = map_indicator(&dev->routes.adapter, dev->indicators);
 912     if (r) {
 913         return r;
 914     }
 915     dev->routes.adapter.summary_addr = dev->summary_indicator->map;
 916     dev->routes.adapter.ind_addr = dev->indicators->map;
 917
 918     return 0;
 919 }
 920
 921 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs)
 922 {
 923     int i;
 924     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 925     int ret;
 926     S390FLICState *fs = s390_get_flic();
 927     S390FLICStateClass *fsc = s390_get_flic_class(fs);
 928
 929     ret = virtio_ccw_get_mappings(dev);
 930     if (ret) {
 931         return ret;
 932     }
 933     for (i = 0; i < nvqs; i++) {
 934         if (!virtio_queue_get_num(vdev, i)) {
 935             break;
 936         }
 937     }
 938     dev->routes.num_routes = i;
 939     return fsc->add_adapter_routes(fs, &dev->routes);
 940 }
 941
 942 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs)
 943 {
 944     S390FLICState *fs = s390_get_flic();
 945     S390FLICStateClass *fsc = s390_get_flic_class(fs);
 946
 947     fsc->release_adapter_routes(fs, &dev->routes);
 948 }
 949
 950 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n)
 951 {
 952     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 953     VirtQueue *vq = virtio_get_queue(vdev, n);
 954     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 955
 956     return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, notifier, NULL,
 957                                               dev->routes.gsi[n]);
 958 }
 959
 960 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n)
 961 {
 962     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 963     VirtQueue *vq = virtio_get_queue(vdev, n);
 964     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 965     int ret;
 966
 967     ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, notifier,
 968                                                 dev->routes.gsi[n]);
 969     assert(ret == 0);
 970 }
 971
 972 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
 973                                          bool assign, bool with_irqfd)
 974 {
 975     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 976     VirtQueue *vq = virtio_get_queue(vdev, n);
 977     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 978     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 979
 980     if (assign) {
 981         int r = event_notifier_init(notifier, 0);
 982
 983         if (r < 0) {
 984             return r;
 985         }
 986         virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
 987         if (with_irqfd) {
 988             r = virtio_ccw_add_irqfd(dev, n);
 989             if (r) {
 990                 virtio_queue_set_guest_notifier_fd_handler(vq, false,
 991                                                            with_irqfd);
 992                 return r;
 993             }
 994         }
 995         /*
 996          * We do not support individual masking for channel devices, so we
 997          * need to manually trigger any guest masking callbacks here.
 998          */
 999         if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) {
1000             k->guest_notifier_mask(vdev, n, false);
1001         }
1002         /* get lost events and re-inject */
1003         if (k->guest_notifier_pending &&
1004             k->guest_notifier_pending(vdev, n)) {
1005             event_notifier_set(notifier);
1006         }
1007     } else {
1008         if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) {
1009             k->guest_notifier_mask(vdev, n, true);
1010         }
1011         if (with_irqfd) {
1012             virtio_ccw_remove_irqfd(dev, n);
1013         }
1014         virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
1015         event_notifier_cleanup(notifier);
1016     }
1017     return 0;
1018 }
1019
1020 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
1021                                           bool assigned)
1022 {
1023     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1024     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1025     CcwDevice *ccw_dev = CCW_DEVICE(d);
1026     bool with_irqfd = ccw_dev->sch->thinint_active && kvm_irqfds_enabled();
1027     int r, n;
1028
1029     if (with_irqfd && assigned) {
1030         /* irq routes need to be set up before assigning irqfds */
1031         r = virtio_ccw_setup_irqroutes(dev, nvqs);
1032         if (r < 0) {
1033             goto irqroute_error;
1034         }
1035     }
1036     for (n = 0; n < nvqs; n++) {
1037         if (!virtio_queue_get_num(vdev, n)) {
1038             break;
1039         }
1040         r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd);
1041         if (r < 0) {
1042             goto assign_error;
1043         }
1044     }
1045     if (with_irqfd && !assigned) {
1046         /* release irq routes after irqfds have been released */
1047         virtio_ccw_release_irqroutes(dev, nvqs);
1048     }
1049     return 0;
1050
1051 assign_error:
1052     while (--n >= 0) {
1053         virtio_ccw_set_guest_notifier(dev, n, !assigned, false);
1054     }
1055 irqroute_error:
1056     if (with_irqfd && assigned) {
1057         virtio_ccw_release_irqroutes(dev, nvqs);
1058     }
1059     return r;
1060 }
1061
1062 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f)
1063 {
1064     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1065     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1066
1067     qemu_put_be16(f, virtio_queue_vector(vdev, n));
1068 }
1069
1070 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f)
1071 {
1072     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1073     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1074     uint16_t vector;
1075
1076     qemu_get_be16s(f, &vector);
1077     virtio_queue_set_vector(vdev, n , vector);
1078
1079     return 0;
1080 }
1081
1082 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f)
1083 {
1084     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1085     vmstate_save_state(f, &vmstate_virtio_ccw_dev, dev, NULL);
1086 }
1087
1088 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f)
1089 {
1090     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1091     return vmstate_load_state(f, &vmstate_virtio_ccw_dev, dev, 1);
1092 }
1093
1094 static void virtio_ccw_pre_plugged(DeviceState *d, Error **errp)
1095 {
1096    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1097    VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1098
1099     if (dev->max_rev >= 1) {
1100         virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1101     }
1102 }
1103
1104 /* This is called by virtio-bus just after the device is plugged. */
1105 static void virtio_ccw_device_plugged(DeviceState *d, Error **errp)
1106 {
1107     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1108     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1109     CcwDevice *ccw_dev = CCW_DEVICE(d);
1110     SubchDev *sch = ccw_dev->sch;
1111     int n = virtio_get_num_queues(vdev);
1112     S390FLICState *flic = s390_get_flic();
1113
1114     if (!virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) {
1115         dev->max_rev = 0;
1116     }
1117
1118     if (virtio_get_num_queues(vdev) > VIRTIO_QUEUE_MAX) {
1119         error_setg(errp, "The number of virtqueues %d "
1120                    "exceeds virtio limit %d", n,
1121                    VIRTIO_QUEUE_MAX);
1122         return;
1123     }
1124     if (virtio_get_num_queues(vdev) > flic->adapter_routes_max_batch) {
1125         error_setg(errp, "The number of virtqueues %d "
1126                    "exceeds flic adapter route limit %d", n,
1127                    flic->adapter_routes_max_batch);
1128         return;
1129     }
1130
1131     sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus);
1132
1133
1134     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
1135                           d->hotplugged, 1);
1136 }
1137
1138 static void virtio_ccw_device_unplugged(DeviceState *d)
1139 {
1140     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1141
1142     virtio_ccw_stop_ioeventfd(dev);
1143 }
1144 /**************** Virtio-ccw Bus Device Descriptions *******************/
1145
1146 static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp)
1147 {
1148     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1149
1150     virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev);
1151     virtio_ccw_device_realize(_dev, errp);
1152 }
1153
1154 static void virtio_ccw_busdev_unrealize(DeviceState *dev, Error **errp)
1155 {
1156     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1157
1158     virtio_ccw_device_unrealize(_dev, errp);
1159 }
1160
1161 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev,
1162                                      DeviceState *dev, Error **errp)
1163 {
1164     VirtioCcwDevice *_dev = to_virtio_ccw_dev_fast(dev);
1165
1166     virtio_ccw_stop_ioeventfd(_dev);
1167 }
1168
1169 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
1170 {
1171     DeviceClass *dc = DEVICE_CLASS(klass);
1172     CCWDeviceClass *k = CCW_DEVICE_CLASS(dc);
1173     VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_CLASS(klass);
1174
1175     k->unplug = virtio_ccw_busdev_unplug;
1176     dc->realize = virtio_ccw_busdev_realize;
1177     dc->unrealize = virtio_ccw_busdev_unrealize;
1178     dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
1179     device_class_set_parent_reset(dc, virtio_ccw_reset, &vdc->parent_reset);
1180 }
1181
1182 static const TypeInfo virtio_ccw_device_info = {
1183     .name = TYPE_VIRTIO_CCW_DEVICE,
1184     .parent = TYPE_CCW_DEVICE,
1185     .instance_size = sizeof(VirtioCcwDevice),
1186     .class_init = virtio_ccw_device_class_init,
1187     .class_size = sizeof(VirtIOCCWDeviceClass),
1188     .abstract = true,
1189 };
1190
1191 /* virtio-ccw-bus */
1192
1193 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
1194                                VirtioCcwDevice *dev)
1195 {
1196     DeviceState *qdev = DEVICE(dev);
1197     char virtio_bus_name[] = "virtio-bus";
1198
1199     qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS,
1200                         qdev, virtio_bus_name);
1201 }
1202
1203 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
1204 {
1205     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1206     BusClass *bus_class = BUS_CLASS(klass);
1207
1208     bus_class->max_dev = 1;
1209     k->notify = virtio_ccw_notify;
1210     k->vmstate_change = virtio_ccw_vmstate_change;
1211     k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
1212     k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
1213     k->save_queue = virtio_ccw_save_queue;
1214     k->load_queue = virtio_ccw_load_queue;
1215     k->save_config = virtio_ccw_save_config;
1216     k->load_config = virtio_ccw_load_config;
1217     k->pre_plugged = virtio_ccw_pre_plugged;
1218     k->device_plugged = virtio_ccw_device_plugged;
1219     k->device_unplugged = virtio_ccw_device_unplugged;
1220     k->ioeventfd_enabled = virtio_ccw_ioeventfd_enabled;
1221     k->ioeventfd_assign = virtio_ccw_ioeventfd_assign;
1222 }
1223
1224 static const TypeInfo virtio_ccw_bus_info = {
1225     .name = TYPE_VIRTIO_CCW_BUS,
1226     .parent = TYPE_VIRTIO_BUS,
1227     .instance_size = sizeof(VirtioCcwBusState),
1228     .class_init = virtio_ccw_bus_class_init,
1229 };
1230
1231 static void virtio_ccw_register(void)
1232 {
1233     type_register_static(&virtio_ccw_bus_info);
1234     type_register_static(&virtio_ccw_device_info);
1235 }
1236
1237 type_init(virtio_ccw_register)