hw/vfio/ccw.c

   1 /*
   2  * vfio based subchannel assignment support
   3  *
   4  * Copyright 2017 IBM Corp.
   5  * Copyright 2019 Red Hat, Inc.
   6  *
   7  * Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
   8  *            Xiao Feng Ren <renxiaof@linux.vnet.ibm.com>
   9  *            Pierre Morel <pmorel@linux.vnet.ibm.com>
  10  *            Cornelia Huck <cohuck@redhat.com>
  11  *
  12  * This work is licensed under the terms of the GNU GPL, version 2 or (at
  13  * your option) any later version. See the COPYING file in the top-level
  14  * directory.
  15  */
  16
  17 #include "qemu/osdep.h"
  18 #include <linux/vfio.h>
  19 #include <linux/vfio_ccw.h>
  20 #include <sys/ioctl.h>
  21
  22 #include "qapi/error.h"
  23 #include "hw/sysbus.h"
  24 #include "hw/vfio/vfio.h"
  25 #include "hw/vfio/vfio-common.h"
  26 #include "hw/s390x/s390-ccw.h"
  27 #include "hw/s390x/vfio-ccw.h"
  28 #include "hw/qdev-properties.h"
  29 #include "hw/s390x/ccw-device.h"
  30 #include "exec/address-spaces.h"
  31 #include "qemu/error-report.h"
  32 #include "qemu/main-loop.h"
  33 #include "qemu/module.h"
  34
  35 struct VFIOCCWDevice {
  36     S390CCWDevice cdev;
  37     VFIODevice vdev;
  38     uint64_t io_region_size;
  39     uint64_t io_region_offset;
  40     struct ccw_io_region *io_region;
  41     uint64_t async_cmd_region_size;
  42     uint64_t async_cmd_region_offset;
  43     struct ccw_cmd_region *async_cmd_region;
  44     EventNotifier io_notifier;
  45     bool force_orb_pfch;
  46     bool warned_orb_pfch;
  47 };
  48
  49 static inline void warn_once_pfch(VFIOCCWDevice *vcdev, SubchDev *sch,
  50                                   const char *msg)
  51 {
  52     warn_report_once_cond(&vcdev->warned_orb_pfch,
  53                           "vfio-ccw (devno %x.%x.%04x): %s",
  54                           sch->cssid, sch->ssid, sch->devno, msg);
  55 }
  56
  57 static void vfio_ccw_compute_needs_reset(VFIODevice *vdev)
  58 {
  59     vdev->needs_reset = false;
  60 }
  61
  62 /*
  63  * We don't need vfio_hot_reset_multi and vfio_eoi operations for
  64  * vfio_ccw device now.
  65  */
  66 struct VFIODeviceOps vfio_ccw_ops = {
  67     .vfio_compute_needs_reset = vfio_ccw_compute_needs_reset,
  68 };
  69
  70 static IOInstEnding vfio_ccw_handle_request(SubchDev *sch)
  71 {
  72     S390CCWDevice *cdev = sch->driver_data;
  73     VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
  74     struct ccw_io_region *region = vcdev->io_region;
  75     int ret;
  76
  77     if (!(sch->orb.ctrl0 & ORB_CTRL0_MASK_PFCH)) {
  78         if (!(vcdev->force_orb_pfch)) {
  79             warn_once_pfch(vcdev, sch, "requires PFCH flag set");
  80             sch_gen_unit_exception(sch);
  81             css_inject_io_interrupt(sch);
  82             return IOINST_CC_EXPECTED;
  83         } else {
  84             sch->orb.ctrl0 |= ORB_CTRL0_MASK_PFCH;
  85             warn_once_pfch(vcdev, sch, "PFCH flag forced");
  86         }
  87     }
  88
  89     QEMU_BUILD_BUG_ON(sizeof(region->orb_area) != sizeof(ORB));
  90     QEMU_BUILD_BUG_ON(sizeof(region->scsw_area) != sizeof(SCSW));
  91     QEMU_BUILD_BUG_ON(sizeof(region->irb_area) != sizeof(IRB));
  92
  93     memset(region, 0, sizeof(*region));
  94
  95     memcpy(region->orb_area, &sch->orb, sizeof(ORB));
  96     memcpy(region->scsw_area, &sch->curr_status.scsw, sizeof(SCSW));
  97
  98 again:
  99     ret = pwrite(vcdev->vdev.fd, region,
 100                  vcdev->io_region_size, vcdev->io_region_offset);
 101     if (ret != vcdev->io_region_size) {
 102         if (errno == EAGAIN) {
 103             goto again;
 104         }
 105         error_report("vfio-ccw: write I/O region failed with errno=%d", errno);
 106         ret = -errno;
 107     } else {
 108         ret = region->ret_code;
 109     }
 110     switch (ret) {
 111     case 0:
 112         return IOINST_CC_EXPECTED;
 113     case -EBUSY:
 114         return IOINST_CC_BUSY;
 115     case -ENODEV:
 116     case -EACCES:
 117         return IOINST_CC_NOT_OPERATIONAL;
 118     case -EFAULT:
 119     default:
 120         sch_gen_unit_exception(sch);
 121         css_inject_io_interrupt(sch);
 122         return IOINST_CC_EXPECTED;
 123     }
 124 }
 125
 126 static int vfio_ccw_handle_clear(SubchDev *sch)
 127 {
 128     S390CCWDevice *cdev = sch->driver_data;
 129     VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
 130     struct ccw_cmd_region *region = vcdev->async_cmd_region;
 131     int ret;
 132
 133     if (!vcdev->async_cmd_region) {
 134         /* Async command region not available, fall back to emulation */
 135         return -ENOSYS;
 136     }
 137
 138     memset(region, 0, sizeof(*region));
 139     region->command = VFIO_CCW_ASYNC_CMD_CSCH;
 140
 141 again:
 142     ret = pwrite(vcdev->vdev.fd, region,
 143                  vcdev->async_cmd_region_size, vcdev->async_cmd_region_offset);
 144     if (ret != vcdev->async_cmd_region_size) {
 145         if (errno == EAGAIN) {
 146             goto again;
 147         }
 148         error_report("vfio-ccw: write cmd region failed with errno=%d", errno);
 149         ret = -errno;
 150     } else {
 151         ret = region->ret_code;
 152     }
 153     switch (ret) {
 154     case 0:
 155     case -ENODEV:
 156     case -EACCES:
 157         return 0;
 158     case -EFAULT:
 159     default:
 160         sch_gen_unit_exception(sch);
 161         css_inject_io_interrupt(sch);
 162         return 0;
 163     }
 164 }
 165
 166 static int vfio_ccw_handle_halt(SubchDev *sch)
 167 {
 168     S390CCWDevice *cdev = sch->driver_data;
 169     VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
 170     struct ccw_cmd_region *region = vcdev->async_cmd_region;
 171     int ret;
 172
 173     if (!vcdev->async_cmd_region) {
 174         /* Async command region not available, fall back to emulation */
 175         return -ENOSYS;
 176     }
 177
 178     memset(region, 0, sizeof(*region));
 179     region->command = VFIO_CCW_ASYNC_CMD_HSCH;
 180
 181 again:
 182     ret = pwrite(vcdev->vdev.fd, region,
 183                  vcdev->async_cmd_region_size, vcdev->async_cmd_region_offset);
 184     if (ret != vcdev->async_cmd_region_size) {
 185         if (errno == EAGAIN) {
 186             goto again;
 187         }
 188         error_report("vfio-ccw: write cmd region failed with errno=%d", errno);
 189         ret = -errno;
 190     } else {
 191         ret = region->ret_code;
 192     }
 193     switch (ret) {
 194     case 0:
 195     case -EBUSY:
 196     case -ENODEV:
 197     case -EACCES:
 198         return 0;
 199     case -EFAULT:
 200     default:
 201         sch_gen_unit_exception(sch);
 202         css_inject_io_interrupt(sch);
 203         return 0;
 204     }
 205 }
 206
 207 static void vfio_ccw_reset(DeviceState *dev)
 208 {
 209     CcwDevice *ccw_dev = DO_UPCAST(CcwDevice, parent_obj, dev);
 210     S390CCWDevice *cdev = DO_UPCAST(S390CCWDevice, parent_obj, ccw_dev);
 211     VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
 212
 213     ioctl(vcdev->vdev.fd, VFIO_DEVICE_RESET);
 214 }
 215
 216 static void vfio_ccw_io_notifier_handler(void *opaque)
 217 {
 218     VFIOCCWDevice *vcdev = opaque;
 219     struct ccw_io_region *region = vcdev->io_region;
 220     S390CCWDevice *cdev = S390_CCW_DEVICE(vcdev);
 221     CcwDevice *ccw_dev = CCW_DEVICE(cdev);
 222     SubchDev *sch = ccw_dev->sch;
 223     SCHIB *schib = &sch->curr_status;
 224     SCSW s;
 225     IRB irb;
 226     int size;
 227
 228     if (!event_notifier_test_and_clear(&vcdev->io_notifier)) {
 229         return;
 230     }
 231
 232     size = pread(vcdev->vdev.fd, region, vcdev->io_region_size,
 233                  vcdev->io_region_offset);
 234     if (size == -1) {
 235         switch (errno) {
 236         case ENODEV:
 237             /* Generate a deferred cc 3 condition. */
 238             schib->scsw.flags |= SCSW_FLAGS_MASK_CC;
 239             schib->scsw.ctrl &= ~SCSW_CTRL_MASK_STCTL;
 240             schib->scsw.ctrl |= (SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND);
 241             goto read_err;
 242         case EFAULT:
 243             /* Memory problem, generate channel data check. */
 244             schib->scsw.ctrl &= ~SCSW_ACTL_START_PEND;
 245             schib->scsw.cstat = SCSW_CSTAT_DATA_CHECK;
 246             schib->scsw.ctrl &= ~SCSW_CTRL_MASK_STCTL;
 247             schib->scsw.ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
 248                        SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
 249             goto read_err;
 250         default:
 251             /* Error, generate channel program check. */
 252             schib->scsw.ctrl &= ~SCSW_ACTL_START_PEND;
 253             schib->scsw.cstat = SCSW_CSTAT_PROG_CHECK;
 254             schib->scsw.ctrl &= ~SCSW_CTRL_MASK_STCTL;
 255             schib->scsw.ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
 256                        SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
 257             goto read_err;
 258         }
 259     } else if (size != vcdev->io_region_size) {
 260         /* Information transfer error, generate channel-control check. */
 261         schib->scsw.ctrl &= ~SCSW_ACTL_START_PEND;
 262         schib->scsw.cstat = SCSW_CSTAT_CHN_CTRL_CHK;
 263         schib->scsw.ctrl &= ~SCSW_CTRL_MASK_STCTL;
 264         schib->scsw.ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
 265                    SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
 266         goto read_err;
 267     }
 268
 269     memcpy(&irb, region->irb_area, sizeof(IRB));
 270
 271     /* Update control block via irb. */
 272     s = schib->scsw;
 273     copy_scsw_to_guest(&s, &irb.scsw);
 274     schib->scsw = s;
 275
 276     /* If a uint check is pending, copy sense data. */
 277     if ((schib->scsw.dstat & SCSW_DSTAT_UNIT_CHECK) &&
 278         (schib->pmcw.chars & PMCW_CHARS_MASK_CSENSE)) {
 279         memcpy(sch->sense_data, irb.ecw, sizeof(irb.ecw));
 280     }
 281
 282 read_err:
 283     css_inject_io_interrupt(sch);
 284 }
 285
 286 static void vfio_ccw_register_io_notifier(VFIOCCWDevice *vcdev, Error **errp)
 287 {
 288     VFIODevice *vdev = &vcdev->vdev;
 289     struct vfio_irq_info *irq_info;
 290     size_t argsz;
 291     int fd;
 292
 293     if (vdev->num_irqs < VFIO_CCW_IO_IRQ_INDEX + 1) {
 294         error_setg(errp, "vfio: unexpected number of io irqs %u",
 295                    vdev->num_irqs);
 296         return;
 297     }
 298
 299     argsz = sizeof(*irq_info);
 300     irq_info = g_malloc0(argsz);
 301     irq_info->index = VFIO_CCW_IO_IRQ_INDEX;
 302     irq_info->argsz = argsz;
 303     if (ioctl(vdev->fd, VFIO_DEVICE_GET_IRQ_INFO,
 304               irq_info) < 0 || irq_info->count < 1) {
 305         error_setg_errno(errp, errno, "vfio: Error getting irq info");
 306         goto out_free_info;
 307     }
 308
 309     if (event_notifier_init(&vcdev->io_notifier, 0)) {
 310         error_setg_errno(errp, errno,
 311                          "vfio: Unable to init event notifier for IO");
 312         goto out_free_info;
 313     }
 314
 315     fd = event_notifier_get_fd(&vcdev->io_notifier);
 316     qemu_set_fd_handler(fd, vfio_ccw_io_notifier_handler, NULL, vcdev);
 317
 318     if (vfio_set_irq_signaling(vdev, VFIO_CCW_IO_IRQ_INDEX, 0,
 319                                VFIO_IRQ_SET_ACTION_TRIGGER, fd, errp)) {
 320         qemu_set_fd_handler(fd, NULL, NULL, vcdev);
 321         event_notifier_cleanup(&vcdev->io_notifier);
 322     }
 323
 324 out_free_info:
 325     g_free(irq_info);
 326 }
 327
 328 static void vfio_ccw_unregister_io_notifier(VFIOCCWDevice *vcdev)
 329 {
 330     Error *err = NULL;
 331
 332     if (vfio_set_irq_signaling(&vcdev->vdev, VFIO_CCW_IO_IRQ_INDEX, 0,
 333                                VFIO_IRQ_SET_ACTION_TRIGGER, -1, &err)) {
 334         error_reportf_err(err, VFIO_MSG_PREFIX, vcdev->vdev.name);
 335     }
 336
 337     qemu_set_fd_handler(event_notifier_get_fd(&vcdev->io_notifier),
 338                         NULL, NULL, vcdev);
 339     event_notifier_cleanup(&vcdev->io_notifier);
 340 }
 341
 342 static void vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp)
 343 {
 344     VFIODevice *vdev = &vcdev->vdev;
 345     struct vfio_region_info *info;
 346     int ret;
 347
 348     /* Sanity check device */
 349     if (!(vdev->flags & VFIO_DEVICE_FLAGS_CCW)) {
 350         error_setg(errp, "vfio: Um, this isn't a vfio-ccw device");
 351         return;
 352     }
 353
 354     /*
 355      * We always expect at least the I/O region to be present. We also
 356      * may have a variable number of regions governed by capabilities.
 357      */
 358     if (vdev->num_regions < VFIO_CCW_CONFIG_REGION_INDEX + 1) {
 359         error_setg(errp, "vfio: too few regions (%u), expected at least %u",
 360                    vdev->num_regions, VFIO_CCW_CONFIG_REGION_INDEX + 1);
 361         return;
 362     }
 363
 364     ret = vfio_get_region_info(vdev, VFIO_CCW_CONFIG_REGION_INDEX, &info);
 365     if (ret) {
 366         error_setg_errno(errp, -ret, "vfio: Error getting config info");
 367         return;
 368     }
 369
 370     vcdev->io_region_size = info->size;
 371     if (sizeof(*vcdev->io_region) != vcdev->io_region_size) {
 372         error_setg(errp, "vfio: Unexpected size of the I/O region");
 373         g_free(info);
 374         return;
 375     }
 376
 377     vcdev->io_region_offset = info->offset;
 378     vcdev->io_region = g_malloc0(info->size);
 379
 380     /* check for the optional async command region */
 381     ret = vfio_get_dev_region_info(vdev, VFIO_REGION_TYPE_CCW,
 382                                    VFIO_REGION_SUBTYPE_CCW_ASYNC_CMD, &info);
 383     if (!ret) {
 384         vcdev->async_cmd_region_size = info->size;
 385         if (sizeof(*vcdev->async_cmd_region) != vcdev->async_cmd_region_size) {
 386             error_setg(errp, "vfio: Unexpected size of the async cmd region");
 387             g_free(vcdev->io_region);
 388             g_free(info);
 389             return;
 390         }
 391         vcdev->async_cmd_region_offset = info->offset;
 392         vcdev->async_cmd_region = g_malloc0(info->size);
 393     }
 394
 395     g_free(info);
 396 }
 397
 398 static void vfio_ccw_put_region(VFIOCCWDevice *vcdev)
 399 {
 400     g_free(vcdev->async_cmd_region);
 401     g_free(vcdev->io_region);
 402 }
 403
 404 static void vfio_ccw_put_device(VFIOCCWDevice *vcdev)
 405 {
 406     g_free(vcdev->vdev.name);
 407     vfio_put_base_device(&vcdev->vdev);
 408 }
 409
 410 static void vfio_ccw_get_device(VFIOGroup *group, VFIOCCWDevice *vcdev,
 411                                 Error **errp)
 412 {
 413     char *name = g_strdup_printf("%x.%x.%04x", vcdev->cdev.hostid.cssid,
 414                                  vcdev->cdev.hostid.ssid,
 415                                  vcdev->cdev.hostid.devid);
 416     VFIODevice *vbasedev;
 417
 418     QLIST_FOREACH(vbasedev, &group->device_list, next) {
 419         if (strcmp(vbasedev->name, name) == 0) {
 420             error_setg(errp, "vfio: subchannel %s has already been attached",
 421                        name);
 422             goto out_err;
 423         }
 424     }
 425
 426     /*
 427      * All vfio-ccw devices are believed to operate in a way compatible with
 428      * memory ballooning, ie. pages pinned in the host are in the current
 429      * working set of the guest driver and therefore never overlap with pages
 430      * available to the guest balloon driver.  This needs to be set before
 431      * vfio_get_device() for vfio common to handle the balloon inhibitor.
 432      */
 433     vcdev->vdev.balloon_allowed = true;
 434
 435     if (vfio_get_device(group, vcdev->cdev.mdevid, &vcdev->vdev, errp)) {
 436         goto out_err;
 437     }
 438
 439     vcdev->vdev.ops = &vfio_ccw_ops;
 440     vcdev->vdev.type = VFIO_DEVICE_TYPE_CCW;
 441     vcdev->vdev.name = name;
 442     vcdev->vdev.dev = &vcdev->cdev.parent_obj.parent_obj;
 443
 444     return;
 445
 446 out_err:
 447     g_free(name);
 448 }
 449
 450 static VFIOGroup *vfio_ccw_get_group(S390CCWDevice *cdev, Error **errp)
 451 {
 452     char *tmp, group_path[PATH_MAX];
 453     ssize_t len;
 454     int groupid;
 455
 456     tmp = g_strdup_printf("/sys/bus/css/devices/%x.%x.%04x/%s/iommu_group",
 457                           cdev->hostid.cssid, cdev->hostid.ssid,
 458                           cdev->hostid.devid, cdev->mdevid);
 459     len = readlink(tmp, group_path, sizeof(group_path));
 460     g_free(tmp);
 461
 462     if (len <= 0 || len >= sizeof(group_path)) {
 463         error_setg(errp, "vfio: no iommu_group found");
 464         return NULL;
 465     }
 466
 467     group_path[len] = 0;
 468
 469     if (sscanf(basename(group_path), "%d", &groupid) != 1) {
 470         error_setg(errp, "vfio: failed to read %s", group_path);
 471         return NULL;
 472     }
 473
 474     return vfio_get_group(groupid, &address_space_memory, errp);
 475 }
 476
 477 static void vfio_ccw_realize(DeviceState *dev, Error **errp)
 478 {
 479     VFIOGroup *group;
 480     CcwDevice *ccw_dev = DO_UPCAST(CcwDevice, parent_obj, dev);
 481     S390CCWDevice *cdev = DO_UPCAST(S390CCWDevice, parent_obj, ccw_dev);
 482     VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
 483     S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(cdev);
 484     Error *err = NULL;
 485
 486     /* Call the class init function for subchannel. */
 487     if (cdc->realize) {
 488         cdc->realize(cdev, vcdev->vdev.sysfsdev, &err);
 489         if (err) {
 490             goto out_err_propagate;
 491         }
 492     }
 493
 494     group = vfio_ccw_get_group(cdev, &err);
 495     if (!group) {
 496         goto out_group_err;
 497     }
 498
 499     vfio_ccw_get_device(group, vcdev, &err);
 500     if (err) {
 501         goto out_device_err;
 502     }
 503
 504     vfio_ccw_get_region(vcdev, &err);
 505     if (err) {
 506         goto out_region_err;
 507     }
 508
 509     vfio_ccw_register_io_notifier(vcdev, &err);
 510     if (err) {
 511         goto out_notifier_err;
 512     }
 513
 514     return;
 515
 516 out_notifier_err:
 517     vfio_ccw_put_region(vcdev);
 518 out_region_err:
 519     vfio_ccw_put_device(vcdev);
 520 out_device_err:
 521     vfio_put_group(group);
 522 out_group_err:
 523     if (cdc->unrealize) {
 524         cdc->unrealize(cdev, NULL);
 525     }
 526 out_err_propagate:
 527     error_propagate(errp, err);
 528 }
 529
 530 static void vfio_ccw_unrealize(DeviceState *dev, Error **errp)
 531 {
 532     CcwDevice *ccw_dev = DO_UPCAST(CcwDevice, parent_obj, dev);
 533     S390CCWDevice *cdev = DO_UPCAST(S390CCWDevice, parent_obj, ccw_dev);
 534     VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
 535     S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(cdev);
 536     VFIOGroup *group = vcdev->vdev.group;
 537
 538     vfio_ccw_unregister_io_notifier(vcdev);
 539     vfio_ccw_put_region(vcdev);
 540     vfio_ccw_put_device(vcdev);
 541     vfio_put_group(group);
 542
 543     if (cdc->unrealize) {
 544         cdc->unrealize(cdev, errp);
 545     }
 546 }
 547
 548 static Property vfio_ccw_properties[] = {
 549     DEFINE_PROP_STRING("sysfsdev", VFIOCCWDevice, vdev.sysfsdev),
 550     DEFINE_PROP_BOOL("force-orb-pfch", VFIOCCWDevice, force_orb_pfch, false),
 551     DEFINE_PROP_END_OF_LIST(),
 552 };
 553
 554 static const VMStateDescription vfio_ccw_vmstate = {
 555     .name = "vfio-ccw",
 556     .unmigratable = 1,
 557 };
 558
 559 static void vfio_ccw_class_init(ObjectClass *klass, void *data)
 560 {
 561     DeviceClass *dc = DEVICE_CLASS(klass);
 562     S390CCWDeviceClass *cdc = S390_CCW_DEVICE_CLASS(klass);
 563
 564     device_class_set_props(dc, vfio_ccw_properties);
 565     dc->vmsd = &vfio_ccw_vmstate;
 566     dc->desc = "VFIO-based subchannel assignment";
 567     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 568     dc->realize = vfio_ccw_realize;
 569     dc->unrealize = vfio_ccw_unrealize;
 570     dc->reset = vfio_ccw_reset;
 571
 572     cdc->handle_request = vfio_ccw_handle_request;
 573     cdc->handle_halt = vfio_ccw_handle_halt;
 574     cdc->handle_clear = vfio_ccw_handle_clear;
 575 }
 576
 577 static const TypeInfo vfio_ccw_info = {
 578     .name = TYPE_VFIO_CCW,
 579     .parent = TYPE_S390_CCW,
 580     .instance_size = sizeof(VFIOCCWDevice),
 581     .class_init = vfio_ccw_class_init,
 582 };
 583
 584 static void register_vfio_ccw_type(void)
 585 {
 586     type_register_static(&vfio_ccw_info);
 587 }
 588
 589 type_init(register_vfio_ccw_type)