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