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 "exec/address-spaces.h" 16 #include "sysemu/kvm.h" 17 #include "net/net.h" 18 #include "hw/virtio/virtio.h" 19 #include "migration/qemu-file-types.h" 20 #include "hw/virtio/virtio-net.h" 21 #include "qemu/bitops.h" 22 #include "qemu/error-report.h" 23 #include "qemu/log.h" 24 #include "qemu/module.h" 25 #include "hw/virtio/virtio-access.h" 26 #include "hw/virtio/virtio-bus.h" 27 #include "hw/s390x/adapter.h" 28 #include "hw/s390x/s390_flic.h" 29 30 #include "hw/s390x/ioinst.h" 31 #include "hw/s390x/css.h" 32 #include "virtio-ccw.h" 33 #include "trace.h" 34 #include "hw/s390x/css-bridge.h" 35 #include "hw/s390x/s390-virtio-ccw.h" 36 #include "sysemu/replay.h" 37 38 #define NR_CLASSIC_INDICATOR_BITS 64 39 40 bool have_virtio_ccw = true; 41 42 static int virtio_ccw_dev_post_load(void *opaque, int version_id) 43 { 44 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(opaque); 45 CcwDevice *ccw_dev = CCW_DEVICE(dev); 46 CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev); 47 48 ccw_dev->sch->driver_data = dev; 49 if (ccw_dev->sch->thinint_active) { 50 dev->routes.adapter.adapter_id = css_get_adapter_id( 51 CSS_IO_ADAPTER_VIRTIO, 52 dev->thinint_isc); 53 } 54 /* Re-fill subch_id after loading the subchannel states.*/ 55 if (ck->refill_ids) { 56 ck->refill_ids(ccw_dev); 57 } 58 return 0; 59 } 60 61 typedef struct VirtioCcwDeviceTmp { 62 VirtioCcwDevice *parent; 63 uint16_t config_vector; 64 } VirtioCcwDeviceTmp; 65 66 static int virtio_ccw_dev_tmp_pre_save(void *opaque) 67 { 68 VirtioCcwDeviceTmp *tmp = opaque; 69 VirtioCcwDevice *dev = tmp->parent; 70 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 71 72 tmp->config_vector = vdev->config_vector; 73 74 return 0; 75 } 76 77 static int virtio_ccw_dev_tmp_post_load(void *opaque, int version_id) 78 { 79 VirtioCcwDeviceTmp *tmp = opaque; 80 VirtioCcwDevice *dev = tmp->parent; 81 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 82 83 vdev->config_vector = tmp->config_vector; 84 return 0; 85 } 86 87 const VMStateDescription vmstate_virtio_ccw_dev_tmp = { 88 .name = "s390_virtio_ccw_dev_tmp", 89 .pre_save = virtio_ccw_dev_tmp_pre_save, 90 .post_load = virtio_ccw_dev_tmp_post_load, 91 .fields = (VMStateField[]) { 92 VMSTATE_UINT16(config_vector, VirtioCcwDeviceTmp), 93 VMSTATE_END_OF_LIST() 94 } 95 }; 96 97 const VMStateDescription vmstate_virtio_ccw_dev = { 98 .name = "s390_virtio_ccw_dev", 99 .version_id = 1, 100 .minimum_version_id = 1, 101 .post_load = virtio_ccw_dev_post_load, 102 .fields = (VMStateField[]) { 103 VMSTATE_CCW_DEVICE(parent_obj, VirtioCcwDevice), 104 VMSTATE_PTR_TO_IND_ADDR(indicators, VirtioCcwDevice), 105 VMSTATE_PTR_TO_IND_ADDR(indicators2, VirtioCcwDevice), 106 VMSTATE_PTR_TO_IND_ADDR(summary_indicator, VirtioCcwDevice), 107 /* 108 * Ugly hack because VirtIODevice does not migrate itself. 109 * This also makes legacy via vmstate_save_state possible. 110 */ 111 VMSTATE_WITH_TMP(VirtioCcwDevice, VirtioCcwDeviceTmp, 112 vmstate_virtio_ccw_dev_tmp), 113 VMSTATE_STRUCT(routes, VirtioCcwDevice, 1, vmstate_adapter_routes, 114 AdapterRoutes), 115 VMSTATE_UINT8(thinint_isc, VirtioCcwDevice), 116 VMSTATE_INT32(revision, VirtioCcwDevice), 117 VMSTATE_END_OF_LIST() 118 } 119 }; 120 121 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, 122 VirtioCcwDevice *dev); 123 124 VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch) 125 { 126 VirtIODevice *vdev = NULL; 127 VirtioCcwDevice *dev = sch->driver_data; 128 129 if (dev) { 130 vdev = virtio_bus_get_device(&dev->bus); 131 } 132 return vdev; 133 } 134 135 static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev) 136 { 137 virtio_bus_start_ioeventfd(&dev->bus); 138 } 139 140 static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev) 141 { 142 virtio_bus_stop_ioeventfd(&dev->bus); 143 } 144 145 static bool virtio_ccw_ioeventfd_enabled(DeviceState *d) 146 { 147 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 148 149 return (dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) != 0; 150 } 151 152 static int virtio_ccw_ioeventfd_assign(DeviceState *d, EventNotifier *notifier, 153 int n, bool assign) 154 { 155 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 156 CcwDevice *ccw_dev = CCW_DEVICE(dev); 157 SubchDev *sch = ccw_dev->sch; 158 uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid; 159 160 return s390_assign_subch_ioeventfd(notifier, sch_id, n, assign); 161 } 162 163 /* Communication blocks used by several channel commands. */ 164 typedef struct VqInfoBlockLegacy { 165 uint64_t queue; 166 uint32_t align; 167 uint16_t index; 168 uint16_t num; 169 } QEMU_PACKED VqInfoBlockLegacy; 170 171 typedef struct VqInfoBlock { 172 uint64_t desc; 173 uint32_t res0; 174 uint16_t index; 175 uint16_t num; 176 uint64_t avail; 177 uint64_t used; 178 } QEMU_PACKED VqInfoBlock; 179 180 typedef struct VqConfigBlock { 181 uint16_t index; 182 uint16_t num_max; 183 } QEMU_PACKED VqConfigBlock; 184 185 typedef struct VirtioFeatDesc { 186 uint32_t features; 187 uint8_t index; 188 } QEMU_PACKED VirtioFeatDesc; 189 190 typedef struct VirtioThinintInfo { 191 hwaddr summary_indicator; 192 hwaddr device_indicator; 193 uint64_t ind_bit; 194 uint8_t isc; 195 } QEMU_PACKED VirtioThinintInfo; 196 197 typedef struct VirtioRevInfo { 198 uint16_t revision; 199 uint16_t length; 200 uint8_t data[]; 201 } QEMU_PACKED VirtioRevInfo; 202 203 /* Specify where the virtqueues for the subchannel are in guest memory. */ 204 static int virtio_ccw_set_vqs(SubchDev *sch, VqInfoBlock *info, 205 VqInfoBlockLegacy *linfo) 206 { 207 VirtIODevice *vdev = virtio_ccw_get_vdev(sch); 208 uint16_t index = info ? info->index : linfo->index; 209 uint16_t num = info ? info->num : linfo->num; 210 uint64_t desc = info ? info->desc : linfo->queue; 211 212 if (index >= VIRTIO_QUEUE_MAX) { 213 return -EINVAL; 214 } 215 216 /* Current code in virtio.c relies on 4K alignment. */ 217 if (linfo && desc && (linfo->align != 4096)) { 218 return -EINVAL; 219 } 220 221 if (!vdev) { 222 return -EINVAL; 223 } 224 225 if (info) { 226 virtio_queue_set_rings(vdev, index, desc, info->avail, info->used); 227 } else { 228 virtio_queue_set_addr(vdev, index, desc); 229 } 230 if (!desc) { 231 virtio_queue_set_vector(vdev, index, VIRTIO_NO_VECTOR); 232 } else { 233 if (info) { 234 /* virtio-1 allows changing the ring size. */ 235 if (virtio_queue_get_max_num(vdev, index) < num) { 236 /* Fail if we exceed the maximum number. */ 237 return -EINVAL; 238 } 239 virtio_queue_set_num(vdev, index, num); 240 virtio_init_region_cache(vdev, index); 241 } else if (virtio_queue_get_num(vdev, index) > num) { 242 /* Fail if we don't have a big enough queue. */ 243 return -EINVAL; 244 } 245 /* We ignore possible increased num for legacy for compatibility. */ 246 virtio_queue_set_vector(vdev, index, index); 247 } 248 /* tell notify handler in case of config change */ 249 vdev->config_vector = VIRTIO_QUEUE_MAX; 250 return 0; 251 } 252 253 static void virtio_ccw_reset_virtio(VirtioCcwDevice *dev) 254 { 255 CcwDevice *ccw_dev = CCW_DEVICE(dev); 256 257 virtio_bus_reset(&dev->bus); 258 if (dev->indicators) { 259 release_indicator(&dev->routes.adapter, dev->indicators); 260 dev->indicators = NULL; 261 } 262 if (dev->indicators2) { 263 release_indicator(&dev->routes.adapter, dev->indicators2); 264 dev->indicators2 = NULL; 265 } 266 if (dev->summary_indicator) { 267 release_indicator(&dev->routes.adapter, dev->summary_indicator); 268 dev->summary_indicator = NULL; 269 } 270 ccw_dev->sch->thinint_active = false; 271 } 272 273 static int virtio_ccw_handle_set_vq(SubchDev *sch, CCW1 ccw, bool check_len, 274 bool is_legacy) 275 { 276 int ret; 277 VqInfoBlock info; 278 VqInfoBlockLegacy linfo; 279 size_t info_len = is_legacy ? sizeof(linfo) : sizeof(info); 280 281 if (check_len) { 282 if (ccw.count != info_len) { 283 return -EINVAL; 284 } 285 } else if (ccw.count < info_len) { 286 /* Can't execute command. */ 287 return -EINVAL; 288 } 289 if (!ccw.cda) { 290 return -EFAULT; 291 } 292 if (is_legacy) { 293 ret = ccw_dstream_read(&sch->cds, linfo); 294 if (ret) { 295 return ret; 296 } 297 linfo.queue = be64_to_cpu(linfo.queue); 298 linfo.align = be32_to_cpu(linfo.align); 299 linfo.index = be16_to_cpu(linfo.index); 300 linfo.num = be16_to_cpu(linfo.num); 301 ret = virtio_ccw_set_vqs(sch, NULL, &linfo); 302 } else { 303 ret = ccw_dstream_read(&sch->cds, info); 304 if (ret) { 305 return ret; 306 } 307 info.desc = be64_to_cpu(info.desc); 308 info.index = be16_to_cpu(info.index); 309 info.num = be16_to_cpu(info.num); 310 info.avail = be64_to_cpu(info.avail); 311 info.used = be64_to_cpu(info.used); 312 ret = virtio_ccw_set_vqs(sch, &info, NULL); 313 } 314 sch->curr_status.scsw.count = 0; 315 return ret; 316 } 317 318 static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) 319 { 320 int ret; 321 VirtioRevInfo revinfo; 322 uint8_t status; 323 VirtioFeatDesc features; 324 hwaddr indicators; 325 VqConfigBlock vq_config; 326 VirtioCcwDevice *dev = sch->driver_data; 327 VirtIODevice *vdev = virtio_ccw_get_vdev(sch); 328 bool check_len; 329 int len; 330 VirtioThinintInfo thinint; 331 332 if (!dev) { 333 return -EINVAL; 334 } 335 336 trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid, 337 ccw.cmd_code); 338 check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC)); 339 340 if (dev->revision < 0 && ccw.cmd_code != CCW_CMD_SET_VIRTIO_REV) { 341 if (dev->force_revision_1) { 342 /* 343 * virtio-1 drivers must start with negotiating to a revision >= 1, 344 * so post a command reject for all other commands 345 */ 346 return -ENOSYS; 347 } else { 348 /* 349 * If the driver issues any command that is not SET_VIRTIO_REV, 350 * we'll have to operate the device in legacy mode. 351 */ 352 dev->revision = 0; 353 } 354 } 355 356 /* Look at the command. */ 357 switch (ccw.cmd_code) { 358 case CCW_CMD_SET_VQ: 359 ret = virtio_ccw_handle_set_vq(sch, ccw, check_len, dev->revision < 1); 360 break; 361 case CCW_CMD_VDEV_RESET: 362 virtio_ccw_reset_virtio(dev); 363 ret = 0; 364 break; 365 case CCW_CMD_READ_FEAT: 366 if (check_len) { 367 if (ccw.count != sizeof(features)) { 368 ret = -EINVAL; 369 break; 370 } 371 } else if (ccw.count < sizeof(features)) { 372 /* Can't execute command. */ 373 ret = -EINVAL; 374 break; 375 } 376 if (!ccw.cda) { 377 ret = -EFAULT; 378 } else { 379 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev); 380 381 ccw_dstream_advance(&sch->cds, sizeof(features.features)); 382 ret = ccw_dstream_read(&sch->cds, features.index); 383 if (ret) { 384 break; 385 } 386 if (features.index == 0) { 387 if (dev->revision >= 1) { 388 /* Don't offer legacy features for modern devices. */ 389 features.features = (uint32_t) 390 (vdev->host_features & ~vdc->legacy_features); 391 } else { 392 features.features = (uint32_t)vdev->host_features; 393 } 394 } else if ((features.index == 1) && (dev->revision >= 1)) { 395 /* 396 * Only offer feature bits beyond 31 if the guest has 397 * negotiated at least revision 1. 398 */ 399 features.features = (uint32_t)(vdev->host_features >> 32); 400 } else { 401 /* Return zeroes if the guest supports more feature bits. */ 402 features.features = 0; 403 } 404 ccw_dstream_rewind(&sch->cds); 405 features.features = cpu_to_le32(features.features); 406 ret = ccw_dstream_write(&sch->cds, features.features); 407 if (!ret) { 408 sch->curr_status.scsw.count = ccw.count - sizeof(features); 409 } 410 } 411 break; 412 case CCW_CMD_WRITE_FEAT: 413 if (check_len) { 414 if (ccw.count != sizeof(features)) { 415 ret = -EINVAL; 416 break; 417 } 418 } else if (ccw.count < sizeof(features)) { 419 /* Can't execute command. */ 420 ret = -EINVAL; 421 break; 422 } 423 if (!ccw.cda) { 424 ret = -EFAULT; 425 } else { 426 ret = ccw_dstream_read(&sch->cds, features); 427 if (ret) { 428 break; 429 } 430 features.features = le32_to_cpu(features.features); 431 if (features.index == 0) { 432 virtio_set_features(vdev, 433 (vdev->guest_features & 0xffffffff00000000ULL) | 434 features.features); 435 } else if ((features.index == 1) && (dev->revision >= 1)) { 436 /* 437 * If the guest did not negotiate at least revision 1, 438 * we did not offer it any feature bits beyond 31. Such a 439 * guest passing us any bit here is therefore buggy. 440 */ 441 virtio_set_features(vdev, 442 (vdev->guest_features & 0x00000000ffffffffULL) | 443 ((uint64_t)features.features << 32)); 444 } else { 445 /* 446 * If the guest supports more feature bits, assert that it 447 * passes us zeroes for those we don't support. 448 */ 449 if (features.features) { 450 qemu_log_mask(LOG_GUEST_ERROR, 451 "Guest bug: features[%i]=%x (expected 0)", 452 features.index, features.features); 453 /* XXX: do a unit check here? */ 454 } 455 } 456 sch->curr_status.scsw.count = ccw.count - sizeof(features); 457 ret = 0; 458 } 459 break; 460 case CCW_CMD_READ_CONF: 461 if (check_len) { 462 if (ccw.count > vdev->config_len) { 463 ret = -EINVAL; 464 break; 465 } 466 } 467 len = MIN(ccw.count, vdev->config_len); 468 if (!ccw.cda) { 469 ret = -EFAULT; 470 } else { 471 virtio_bus_get_vdev_config(&dev->bus, vdev->config); 472 ret = ccw_dstream_write_buf(&sch->cds, vdev->config, len); 473 if (ret) { 474 sch->curr_status.scsw.count = ccw.count - len; 475 } 476 } 477 break; 478 case CCW_CMD_WRITE_CONF: 479 if (check_len) { 480 if (ccw.count > vdev->config_len) { 481 ret = -EINVAL; 482 break; 483 } 484 } 485 len = MIN(ccw.count, vdev->config_len); 486 if (!ccw.cda) { 487 ret = -EFAULT; 488 } else { 489 ret = ccw_dstream_read_buf(&sch->cds, vdev->config, len); 490 if (!ret) { 491 virtio_bus_set_vdev_config(&dev->bus, vdev->config); 492 sch->curr_status.scsw.count = ccw.count - len; 493 } 494 } 495 break; 496 case CCW_CMD_READ_STATUS: 497 if (check_len) { 498 if (ccw.count != sizeof(status)) { 499 ret = -EINVAL; 500 break; 501 } 502 } else if (ccw.count < sizeof(status)) { 503 /* Can't execute command. */ 504 ret = -EINVAL; 505 break; 506 } 507 if (!ccw.cda) { 508 ret = -EFAULT; 509 } else { 510 address_space_stb(&address_space_memory, ccw.cda, vdev->status, 511 MEMTXATTRS_UNSPECIFIED, NULL); 512 sch->curr_status.scsw.count = ccw.count - sizeof(vdev->status); 513 ret = 0; 514 } 515 break; 516 case CCW_CMD_WRITE_STATUS: 517 if (check_len) { 518 if (ccw.count != sizeof(status)) { 519 ret = -EINVAL; 520 break; 521 } 522 } else if (ccw.count < sizeof(status)) { 523 /* Can't execute command. */ 524 ret = -EINVAL; 525 break; 526 } 527 if (!ccw.cda) { 528 ret = -EFAULT; 529 } else { 530 ret = ccw_dstream_read(&sch->cds, status); 531 if (ret) { 532 break; 533 } 534 if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { 535 virtio_ccw_stop_ioeventfd(dev); 536 } 537 if (virtio_set_status(vdev, status) == 0) { 538 if (vdev->status == 0) { 539 virtio_ccw_reset_virtio(dev); 540 } 541 if (status & VIRTIO_CONFIG_S_DRIVER_OK) { 542 virtio_ccw_start_ioeventfd(dev); 543 } 544 sch->curr_status.scsw.count = ccw.count - sizeof(status); 545 ret = 0; 546 } else { 547 /* Trigger a command reject. */ 548 ret = -ENOSYS; 549 } 550 } 551 break; 552 case CCW_CMD_SET_IND: 553 if (check_len) { 554 if (ccw.count != sizeof(indicators)) { 555 ret = -EINVAL; 556 break; 557 } 558 } else if (ccw.count < sizeof(indicators)) { 559 /* Can't execute command. */ 560 ret = -EINVAL; 561 break; 562 } 563 if (sch->thinint_active) { 564 /* Trigger a command reject. */ 565 ret = -ENOSYS; 566 break; 567 } 568 if (virtio_get_num_queues(vdev) > NR_CLASSIC_INDICATOR_BITS) { 569 /* More queues than indicator bits --> trigger a reject */ 570 ret = -ENOSYS; 571 break; 572 } 573 if (!ccw.cda) { 574 ret = -EFAULT; 575 } else { 576 ret = ccw_dstream_read(&sch->cds, indicators); 577 if (ret) { 578 break; 579 } 580 indicators = be64_to_cpu(indicators); 581 dev->indicators = get_indicator(indicators, sizeof(uint64_t)); 582 sch->curr_status.scsw.count = ccw.count - sizeof(indicators); 583 ret = 0; 584 } 585 break; 586 case CCW_CMD_SET_CONF_IND: 587 if (check_len) { 588 if (ccw.count != sizeof(indicators)) { 589 ret = -EINVAL; 590 break; 591 } 592 } else if (ccw.count < sizeof(indicators)) { 593 /* Can't execute command. */ 594 ret = -EINVAL; 595 break; 596 } 597 if (!ccw.cda) { 598 ret = -EFAULT; 599 } else { 600 ret = ccw_dstream_read(&sch->cds, indicators); 601 if (ret) { 602 break; 603 } 604 indicators = be64_to_cpu(indicators); 605 dev->indicators2 = get_indicator(indicators, sizeof(uint64_t)); 606 sch->curr_status.scsw.count = ccw.count - sizeof(indicators); 607 ret = 0; 608 } 609 break; 610 case CCW_CMD_READ_VQ_CONF: 611 if (check_len) { 612 if (ccw.count != sizeof(vq_config)) { 613 ret = -EINVAL; 614 break; 615 } 616 } else if (ccw.count < sizeof(vq_config)) { 617 /* Can't execute command. */ 618 ret = -EINVAL; 619 break; 620 } 621 if (!ccw.cda) { 622 ret = -EFAULT; 623 } else { 624 ret = ccw_dstream_read(&sch->cds, vq_config.index); 625 if (ret) { 626 break; 627 } 628 vq_config.index = be16_to_cpu(vq_config.index); 629 if (vq_config.index >= VIRTIO_QUEUE_MAX) { 630 ret = -EINVAL; 631 break; 632 } 633 vq_config.num_max = virtio_queue_get_num(vdev, 634 vq_config.index); 635 vq_config.num_max = cpu_to_be16(vq_config.num_max); 636 ret = ccw_dstream_write(&sch->cds, vq_config.num_max); 637 if (!ret) { 638 sch->curr_status.scsw.count = ccw.count - sizeof(vq_config); 639 } 640 } 641 break; 642 case CCW_CMD_SET_IND_ADAPTER: 643 if (check_len) { 644 if (ccw.count != sizeof(thinint)) { 645 ret = -EINVAL; 646 break; 647 } 648 } else if (ccw.count < sizeof(thinint)) { 649 /* Can't execute command. */ 650 ret = -EINVAL; 651 break; 652 } 653 if (!ccw.cda) { 654 ret = -EFAULT; 655 } else if (dev->indicators && !sch->thinint_active) { 656 /* Trigger a command reject. */ 657 ret = -ENOSYS; 658 } else { 659 if (ccw_dstream_read(&sch->cds, thinint)) { 660 ret = -EFAULT; 661 } else { 662 thinint.ind_bit = be64_to_cpu(thinint.ind_bit); 663 thinint.summary_indicator = 664 be64_to_cpu(thinint.summary_indicator); 665 thinint.device_indicator = 666 be64_to_cpu(thinint.device_indicator); 667 668 dev->summary_indicator = 669 get_indicator(thinint.summary_indicator, sizeof(uint8_t)); 670 dev->indicators = 671 get_indicator(thinint.device_indicator, 672 thinint.ind_bit / 8 + 1); 673 dev->thinint_isc = thinint.isc; 674 dev->routes.adapter.ind_offset = thinint.ind_bit; 675 dev->routes.adapter.summary_offset = 7; 676 dev->routes.adapter.adapter_id = css_get_adapter_id( 677 CSS_IO_ADAPTER_VIRTIO, 678 dev->thinint_isc); 679 sch->thinint_active = ((dev->indicators != NULL) && 680 (dev->summary_indicator != NULL)); 681 sch->curr_status.scsw.count = ccw.count - sizeof(thinint); 682 ret = 0; 683 } 684 } 685 break; 686 case CCW_CMD_SET_VIRTIO_REV: 687 len = sizeof(revinfo); 688 if (ccw.count < len) { 689 ret = -EINVAL; 690 break; 691 } 692 if (!ccw.cda) { 693 ret = -EFAULT; 694 break; 695 } 696 ret = ccw_dstream_read_buf(&sch->cds, &revinfo, 4); 697 if (ret < 0) { 698 break; 699 } 700 revinfo.revision = be16_to_cpu(revinfo.revision); 701 revinfo.length = be16_to_cpu(revinfo.length); 702 if (ccw.count < len + revinfo.length || 703 (check_len && ccw.count > len + revinfo.length)) { 704 ret = -EINVAL; 705 break; 706 } 707 /* 708 * Once we start to support revisions with additional data, we'll 709 * need to fetch it here. Nothing to do for now, though. 710 */ 711 if (dev->revision >= 0 || 712 revinfo.revision > virtio_ccw_rev_max(dev) || 713 (dev->force_revision_1 && !revinfo.revision)) { 714 ret = -ENOSYS; 715 break; 716 } 717 ret = 0; 718 dev->revision = revinfo.revision; 719 break; 720 default: 721 ret = -ENOSYS; 722 break; 723 } 724 return ret; 725 } 726 727 static void virtio_sch_disable_cb(SubchDev *sch) 728 { 729 VirtioCcwDevice *dev = sch->driver_data; 730 731 dev->revision = -1; 732 } 733 734 static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) 735 { 736 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 737 CcwDevice *ccw_dev = CCW_DEVICE(dev); 738 CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev); 739 SubchDev *sch; 740 Error *err = NULL; 741 int i; 742 743 sch = css_create_sch(ccw_dev->devno, errp); 744 if (!sch) { 745 return; 746 } 747 if (!virtio_ccw_rev_max(dev) && dev->force_revision_1) { 748 error_setg(&err, "Invalid value of property max_rev " 749 "(is %d expected >= 1)", virtio_ccw_rev_max(dev)); 750 goto out_err; 751 } 752 753 sch->driver_data = dev; 754 sch->ccw_cb = virtio_ccw_cb; 755 sch->disable_cb = virtio_sch_disable_cb; 756 sch->id.reserved = 0xff; 757 sch->id.cu_type = VIRTIO_CCW_CU_TYPE; 758 sch->do_subchannel_work = do_subchannel_work_virtual; 759 sch->irb_cb = build_irb_virtual; 760 ccw_dev->sch = sch; 761 dev->indicators = NULL; 762 dev->revision = -1; 763 for (i = 0; i < ADAPTER_ROUTES_MAX_GSI; i++) { 764 dev->routes.gsi[i] = -1; 765 } 766 css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE); 767 768 trace_virtio_ccw_new_device( 769 sch->cssid, sch->ssid, sch->schid, sch->devno, 770 ccw_dev->devno.valid ? "user-configured" : "auto-configured"); 771 772 if (kvm_enabled() && !kvm_eventfds_enabled()) { 773 dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD; 774 } 775 776 /* fd-based ioevents can't be synchronized in record/replay */ 777 if (replay_mode != REPLAY_MODE_NONE) { 778 dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD; 779 } 780 781 if (k->realize) { 782 k->realize(dev, &err); 783 if (err) { 784 goto out_err; 785 } 786 } 787 788 ck->realize(ccw_dev, &err); 789 if (err) { 790 goto out_err; 791 } 792 793 return; 794 795 out_err: 796 error_propagate(errp, err); 797 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); 798 ccw_dev->sch = NULL; 799 g_free(sch); 800 } 801 802 static void virtio_ccw_device_unrealize(VirtioCcwDevice *dev) 803 { 804 VirtIOCCWDeviceClass *dc = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 805 CcwDevice *ccw_dev = CCW_DEVICE(dev); 806 SubchDev *sch = ccw_dev->sch; 807 808 if (dc->unrealize) { 809 dc->unrealize(dev); 810 } 811 812 if (sch) { 813 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); 814 g_free(sch); 815 ccw_dev->sch = NULL; 816 } 817 if (dev->indicators) { 818 release_indicator(&dev->routes.adapter, dev->indicators); 819 dev->indicators = NULL; 820 } 821 } 822 823 /* DeviceState to VirtioCcwDevice. Note: used on datapath, 824 * be careful and test performance if you change this. 825 */ 826 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d) 827 { 828 CcwDevice *ccw_dev = to_ccw_dev_fast(d); 829 830 return container_of(ccw_dev, VirtioCcwDevice, parent_obj); 831 } 832 833 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc, 834 uint8_t to_be_set) 835 { 836 uint8_t expected, actual; 837 hwaddr len = 1; 838 /* avoid multiple fetches */ 839 uint8_t volatile *ind_addr; 840 841 ind_addr = cpu_physical_memory_map(ind_loc, &len, true); 842 if (!ind_addr) { 843 error_report("%s(%x.%x.%04x): unable to access indicator", 844 __func__, sch->cssid, sch->ssid, sch->schid); 845 return -1; 846 } 847 actual = *ind_addr; 848 do { 849 expected = actual; 850 actual = qatomic_cmpxchg(ind_addr, expected, expected | to_be_set); 851 } while (actual != expected); 852 trace_virtio_ccw_set_ind(ind_loc, actual, actual | to_be_set); 853 cpu_physical_memory_unmap((void *)ind_addr, len, 1, len); 854 855 return actual; 856 } 857 858 static void virtio_ccw_notify(DeviceState *d, uint16_t vector) 859 { 860 VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d); 861 CcwDevice *ccw_dev = to_ccw_dev_fast(d); 862 SubchDev *sch = ccw_dev->sch; 863 uint64_t indicators; 864 865 if (vector == VIRTIO_NO_VECTOR) { 866 return; 867 } 868 /* 869 * vector < VIRTIO_QUEUE_MAX: notification for a virtqueue 870 * vector == VIRTIO_QUEUE_MAX: configuration change notification 871 * bits beyond that are unused and should never be notified for 872 */ 873 assert(vector <= VIRTIO_QUEUE_MAX); 874 875 if (vector < VIRTIO_QUEUE_MAX) { 876 if (!dev->indicators) { 877 return; 878 } 879 if (sch->thinint_active) { 880 /* 881 * In the adapter interrupt case, indicators points to a 882 * memory area that may be (way) larger than 64 bit and 883 * ind_bit indicates the start of the indicators in a big 884 * endian notation. 885 */ 886 uint64_t ind_bit = dev->routes.adapter.ind_offset; 887 888 virtio_set_ind_atomic(sch, dev->indicators->addr + 889 (ind_bit + vector) / 8, 890 0x80 >> ((ind_bit + vector) % 8)); 891 if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr, 892 0x01)) { 893 css_adapter_interrupt(CSS_IO_ADAPTER_VIRTIO, dev->thinint_isc); 894 } 895 } else { 896 assert(vector < NR_CLASSIC_INDICATOR_BITS); 897 indicators = address_space_ldq(&address_space_memory, 898 dev->indicators->addr, 899 MEMTXATTRS_UNSPECIFIED, 900 NULL); 901 indicators |= 1ULL << vector; 902 address_space_stq(&address_space_memory, dev->indicators->addr, 903 indicators, MEMTXATTRS_UNSPECIFIED, NULL); 904 css_conditional_io_interrupt(sch); 905 } 906 } else { 907 if (!dev->indicators2) { 908 return; 909 } 910 indicators = address_space_ldq(&address_space_memory, 911 dev->indicators2->addr, 912 MEMTXATTRS_UNSPECIFIED, 913 NULL); 914 indicators |= 1ULL; 915 address_space_stq(&address_space_memory, dev->indicators2->addr, 916 indicators, MEMTXATTRS_UNSPECIFIED, NULL); 917 css_conditional_io_interrupt(sch); 918 } 919 } 920 921 static void virtio_ccw_reset(DeviceState *d) 922 { 923 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 924 VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 925 926 virtio_ccw_reset_virtio(dev); 927 if (vdc->parent_reset) { 928 vdc->parent_reset(d); 929 } 930 } 931 932 static void virtio_ccw_vmstate_change(DeviceState *d, bool running) 933 { 934 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 935 936 if (running) { 937 virtio_ccw_start_ioeventfd(dev); 938 } else { 939 virtio_ccw_stop_ioeventfd(dev); 940 } 941 } 942 943 static bool virtio_ccw_query_guest_notifiers(DeviceState *d) 944 { 945 CcwDevice *dev = CCW_DEVICE(d); 946 947 return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA); 948 } 949 950 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev) 951 { 952 int r; 953 CcwDevice *ccw_dev = CCW_DEVICE(dev); 954 955 if (!ccw_dev->sch->thinint_active) { 956 return -EINVAL; 957 } 958 959 r = map_indicator(&dev->routes.adapter, dev->summary_indicator); 960 if (r) { 961 return r; 962 } 963 r = map_indicator(&dev->routes.adapter, dev->indicators); 964 if (r) { 965 return r; 966 } 967 dev->routes.adapter.summary_addr = dev->summary_indicator->map; 968 dev->routes.adapter.ind_addr = dev->indicators->map; 969 970 return 0; 971 } 972 973 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs) 974 { 975 int i; 976 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 977 int ret; 978 S390FLICState *fs = s390_get_flic(); 979 S390FLICStateClass *fsc = s390_get_flic_class(fs); 980 981 ret = virtio_ccw_get_mappings(dev); 982 if (ret) { 983 return ret; 984 } 985 for (i = 0; i < nvqs; i++) { 986 if (!virtio_queue_get_num(vdev, i)) { 987 break; 988 } 989 } 990 dev->routes.num_routes = i; 991 return fsc->add_adapter_routes(fs, &dev->routes); 992 } 993 994 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs) 995 { 996 S390FLICState *fs = s390_get_flic(); 997 S390FLICStateClass *fsc = s390_get_flic_class(fs); 998 999 fsc->release_adapter_routes(fs, &dev->routes); 1000 } 1001 1002 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n) 1003 { 1004 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1005 VirtQueue *vq = virtio_get_queue(vdev, n); 1006 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1007 1008 return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, notifier, NULL, 1009 dev->routes.gsi[n]); 1010 } 1011 1012 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n) 1013 { 1014 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1015 VirtQueue *vq = virtio_get_queue(vdev, n); 1016 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1017 int ret; 1018 1019 ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, notifier, 1020 dev->routes.gsi[n]); 1021 assert(ret == 0); 1022 } 1023 1024 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n, 1025 bool assign, bool with_irqfd) 1026 { 1027 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1028 VirtQueue *vq = virtio_get_queue(vdev, n); 1029 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1030 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 1031 1032 if (assign) { 1033 int r = event_notifier_init(notifier, 0); 1034 1035 if (r < 0) { 1036 return r; 1037 } 1038 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); 1039 if (with_irqfd) { 1040 r = virtio_ccw_add_irqfd(dev, n); 1041 if (r) { 1042 virtio_queue_set_guest_notifier_fd_handler(vq, false, 1043 with_irqfd); 1044 return r; 1045 } 1046 } 1047 /* 1048 * We do not support individual masking for channel devices, so we 1049 * need to manually trigger any guest masking callbacks here. 1050 */ 1051 if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) { 1052 k->guest_notifier_mask(vdev, n, false); 1053 } 1054 /* get lost events and re-inject */ 1055 if (k->guest_notifier_pending && 1056 k->guest_notifier_pending(vdev, n)) { 1057 event_notifier_set(notifier); 1058 } 1059 } else { 1060 if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) { 1061 k->guest_notifier_mask(vdev, n, true); 1062 } 1063 if (with_irqfd) { 1064 virtio_ccw_remove_irqfd(dev, n); 1065 } 1066 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); 1067 event_notifier_cleanup(notifier); 1068 } 1069 return 0; 1070 } 1071 1072 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs, 1073 bool assigned) 1074 { 1075 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1076 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1077 CcwDevice *ccw_dev = CCW_DEVICE(d); 1078 bool with_irqfd = ccw_dev->sch->thinint_active && kvm_irqfds_enabled(); 1079 int r, n; 1080 1081 if (with_irqfd && assigned) { 1082 /* irq routes need to be set up before assigning irqfds */ 1083 r = virtio_ccw_setup_irqroutes(dev, nvqs); 1084 if (r < 0) { 1085 goto irqroute_error; 1086 } 1087 } 1088 for (n = 0; n < nvqs; n++) { 1089 if (!virtio_queue_get_num(vdev, n)) { 1090 break; 1091 } 1092 r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd); 1093 if (r < 0) { 1094 goto assign_error; 1095 } 1096 } 1097 if (with_irqfd && !assigned) { 1098 /* release irq routes after irqfds have been released */ 1099 virtio_ccw_release_irqroutes(dev, nvqs); 1100 } 1101 return 0; 1102 1103 assign_error: 1104 while (--n >= 0) { 1105 virtio_ccw_set_guest_notifier(dev, n, !assigned, false); 1106 } 1107 irqroute_error: 1108 if (with_irqfd && assigned) { 1109 virtio_ccw_release_irqroutes(dev, nvqs); 1110 } 1111 return r; 1112 } 1113 1114 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f) 1115 { 1116 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1117 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1118 1119 qemu_put_be16(f, virtio_queue_vector(vdev, n)); 1120 } 1121 1122 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f) 1123 { 1124 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1125 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1126 uint16_t vector; 1127 1128 qemu_get_be16s(f, &vector); 1129 virtio_queue_set_vector(vdev, n , vector); 1130 1131 return 0; 1132 } 1133 1134 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f) 1135 { 1136 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1137 vmstate_save_state(f, &vmstate_virtio_ccw_dev, dev, NULL); 1138 } 1139 1140 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f) 1141 { 1142 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1143 return vmstate_load_state(f, &vmstate_virtio_ccw_dev, dev, 1); 1144 } 1145 1146 static void virtio_ccw_pre_plugged(DeviceState *d, Error **errp) 1147 { 1148 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1149 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1150 1151 if (dev->max_rev >= 1) { 1152 virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1); 1153 } 1154 } 1155 1156 /* This is called by virtio-bus just after the device is plugged. */ 1157 static void virtio_ccw_device_plugged(DeviceState *d, Error **errp) 1158 { 1159 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1160 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1161 CcwDevice *ccw_dev = CCW_DEVICE(d); 1162 SubchDev *sch = ccw_dev->sch; 1163 int n = virtio_get_num_queues(vdev); 1164 S390FLICState *flic = s390_get_flic(); 1165 1166 if (!virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) { 1167 dev->max_rev = 0; 1168 } 1169 1170 if (!virtio_ccw_rev_max(dev) && !virtio_legacy_allowed(vdev)) { 1171 /* 1172 * To avoid migration issues, we allow legacy mode when legacy 1173 * check is disabled in the old machine types (< 5.1). 1174 */ 1175 if (virtio_legacy_check_disabled(vdev)) { 1176 warn_report("device requires revision >= 1, but for backward " 1177 "compatibility max_revision=0 is allowed"); 1178 } else { 1179 error_setg(errp, "Invalid value of property max_rev " 1180 "(is %d expected >= 1)", virtio_ccw_rev_max(dev)); 1181 return; 1182 } 1183 } 1184 1185 if (virtio_get_num_queues(vdev) > VIRTIO_QUEUE_MAX) { 1186 error_setg(errp, "The number of virtqueues %d " 1187 "exceeds virtio limit %d", n, 1188 VIRTIO_QUEUE_MAX); 1189 return; 1190 } 1191 if (virtio_get_num_queues(vdev) > flic->adapter_routes_max_batch) { 1192 error_setg(errp, "The number of virtqueues %d " 1193 "exceeds flic adapter route limit %d", n, 1194 flic->adapter_routes_max_batch); 1195 return; 1196 } 1197 1198 sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus); 1199 1200 1201 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1202 d->hotplugged, 1); 1203 } 1204 1205 static void virtio_ccw_device_unplugged(DeviceState *d) 1206 { 1207 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1208 1209 virtio_ccw_stop_ioeventfd(dev); 1210 } 1211 /**************** Virtio-ccw Bus Device Descriptions *******************/ 1212 1213 static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp) 1214 { 1215 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1216 1217 virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev); 1218 virtio_ccw_device_realize(_dev, errp); 1219 } 1220 1221 static void virtio_ccw_busdev_unrealize(DeviceState *dev) 1222 { 1223 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1224 1225 virtio_ccw_device_unrealize(_dev); 1226 } 1227 1228 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev, 1229 DeviceState *dev, Error **errp) 1230 { 1231 VirtioCcwDevice *_dev = to_virtio_ccw_dev_fast(dev); 1232 1233 virtio_ccw_stop_ioeventfd(_dev); 1234 } 1235 1236 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data) 1237 { 1238 DeviceClass *dc = DEVICE_CLASS(klass); 1239 CCWDeviceClass *k = CCW_DEVICE_CLASS(dc); 1240 VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_CLASS(klass); 1241 1242 k->unplug = virtio_ccw_busdev_unplug; 1243 dc->realize = virtio_ccw_busdev_realize; 1244 dc->unrealize = virtio_ccw_busdev_unrealize; 1245 device_class_set_parent_reset(dc, virtio_ccw_reset, &vdc->parent_reset); 1246 } 1247 1248 static const TypeInfo virtio_ccw_device_info = { 1249 .name = TYPE_VIRTIO_CCW_DEVICE, 1250 .parent = TYPE_CCW_DEVICE, 1251 .instance_size = sizeof(VirtioCcwDevice), 1252 .class_init = virtio_ccw_device_class_init, 1253 .class_size = sizeof(VirtIOCCWDeviceClass), 1254 .abstract = true, 1255 }; 1256 1257 /* virtio-ccw-bus */ 1258 1259 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, 1260 VirtioCcwDevice *dev) 1261 { 1262 DeviceState *qdev = DEVICE(dev); 1263 char virtio_bus_name[] = "virtio-bus"; 1264 1265 qbus_init(bus, bus_size, TYPE_VIRTIO_CCW_BUS, qdev, virtio_bus_name); 1266 } 1267 1268 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data) 1269 { 1270 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 1271 BusClass *bus_class = BUS_CLASS(klass); 1272 1273 bus_class->max_dev = 1; 1274 k->notify = virtio_ccw_notify; 1275 k->vmstate_change = virtio_ccw_vmstate_change; 1276 k->query_guest_notifiers = virtio_ccw_query_guest_notifiers; 1277 k->set_guest_notifiers = virtio_ccw_set_guest_notifiers; 1278 k->save_queue = virtio_ccw_save_queue; 1279 k->load_queue = virtio_ccw_load_queue; 1280 k->save_config = virtio_ccw_save_config; 1281 k->load_config = virtio_ccw_load_config; 1282 k->pre_plugged = virtio_ccw_pre_plugged; 1283 k->device_plugged = virtio_ccw_device_plugged; 1284 k->device_unplugged = virtio_ccw_device_unplugged; 1285 k->ioeventfd_enabled = virtio_ccw_ioeventfd_enabled; 1286 k->ioeventfd_assign = virtio_ccw_ioeventfd_assign; 1287 } 1288 1289 static const TypeInfo virtio_ccw_bus_info = { 1290 .name = TYPE_VIRTIO_CCW_BUS, 1291 .parent = TYPE_VIRTIO_BUS, 1292 .instance_size = sizeof(VirtioCcwBusState), 1293 .class_size = sizeof(VirtioCcwBusClass), 1294 .class_init = virtio_ccw_bus_class_init, 1295 }; 1296 1297 static void virtio_ccw_register(void) 1298 { 1299 type_register_static(&virtio_ccw_bus_info); 1300 type_register_static(&virtio_ccw_device_info); 1301 } 1302 1303 type_init(virtio_ccw_register) 1304