virtio-ccw.c (41333B)
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 } else if (virtio_queue_get_num(vdev, index) > num) { 241 /* Fail if we don't have a big enough queue. */ 242 return -EINVAL; 243 } 244 /* We ignore possible increased num for legacy for compatibility. */ 245 virtio_queue_set_vector(vdev, index, index); 246 } 247 /* tell notify handler in case of config change */ 248 vdev->config_vector = VIRTIO_QUEUE_MAX; 249 return 0; 250 } 251 252 static void virtio_ccw_reset_virtio(VirtioCcwDevice *dev) 253 { 254 CcwDevice *ccw_dev = CCW_DEVICE(dev); 255 256 virtio_bus_reset(&dev->bus); 257 if (dev->indicators) { 258 release_indicator(&dev->routes.adapter, dev->indicators); 259 dev->indicators = NULL; 260 } 261 if (dev->indicators2) { 262 release_indicator(&dev->routes.adapter, dev->indicators2); 263 dev->indicators2 = NULL; 264 } 265 if (dev->summary_indicator) { 266 release_indicator(&dev->routes.adapter, dev->summary_indicator); 267 dev->summary_indicator = NULL; 268 } 269 ccw_dev->sch->thinint_active = false; 270 } 271 272 static int virtio_ccw_handle_set_vq(SubchDev *sch, CCW1 ccw, bool check_len, 273 bool is_legacy) 274 { 275 int ret; 276 VqInfoBlock info; 277 VqInfoBlockLegacy linfo; 278 size_t info_len = is_legacy ? sizeof(linfo) : sizeof(info); 279 280 if (check_len) { 281 if (ccw.count != info_len) { 282 return -EINVAL; 283 } 284 } else if (ccw.count < info_len) { 285 /* Can't execute command. */ 286 return -EINVAL; 287 } 288 if (!ccw.cda) { 289 return -EFAULT; 290 } 291 if (is_legacy) { 292 ret = ccw_dstream_read(&sch->cds, linfo); 293 if (ret) { 294 return ret; 295 } 296 linfo.queue = be64_to_cpu(linfo.queue); 297 linfo.align = be32_to_cpu(linfo.align); 298 linfo.index = be16_to_cpu(linfo.index); 299 linfo.num = be16_to_cpu(linfo.num); 300 ret = virtio_ccw_set_vqs(sch, NULL, &linfo); 301 } else { 302 ret = ccw_dstream_read(&sch->cds, info); 303 if (ret) { 304 return ret; 305 } 306 info.desc = be64_to_cpu(info.desc); 307 info.index = be16_to_cpu(info.index); 308 info.num = be16_to_cpu(info.num); 309 info.avail = be64_to_cpu(info.avail); 310 info.used = be64_to_cpu(info.used); 311 ret = virtio_ccw_set_vqs(sch, &info, NULL); 312 } 313 sch->curr_status.scsw.count = 0; 314 return ret; 315 } 316 317 static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) 318 { 319 int ret; 320 VirtioRevInfo revinfo; 321 uint8_t status; 322 VirtioFeatDesc features; 323 hwaddr indicators; 324 VqConfigBlock vq_config; 325 VirtioCcwDevice *dev = sch->driver_data; 326 VirtIODevice *vdev = virtio_ccw_get_vdev(sch); 327 bool check_len; 328 int len; 329 VirtioThinintInfo thinint; 330 331 if (!dev) { 332 return -EINVAL; 333 } 334 335 trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid, 336 ccw.cmd_code); 337 check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC)); 338 339 if (dev->revision < 0 && ccw.cmd_code != CCW_CMD_SET_VIRTIO_REV) { 340 if (dev->force_revision_1) { 341 /* 342 * virtio-1 drivers must start with negotiating to a revision >= 1, 343 * so post a command reject for all other commands 344 */ 345 return -ENOSYS; 346 } else { 347 /* 348 * If the driver issues any command that is not SET_VIRTIO_REV, 349 * we'll have to operate the device in legacy mode. 350 */ 351 dev->revision = 0; 352 } 353 } 354 355 /* Look at the command. */ 356 switch (ccw.cmd_code) { 357 case CCW_CMD_SET_VQ: 358 ret = virtio_ccw_handle_set_vq(sch, ccw, check_len, dev->revision < 1); 359 break; 360 case CCW_CMD_VDEV_RESET: 361 virtio_ccw_reset_virtio(dev); 362 ret = 0; 363 break; 364 case CCW_CMD_READ_FEAT: 365 if (check_len) { 366 if (ccw.count != sizeof(features)) { 367 ret = -EINVAL; 368 break; 369 } 370 } else if (ccw.count < sizeof(features)) { 371 /* Can't execute command. */ 372 ret = -EINVAL; 373 break; 374 } 375 if (!ccw.cda) { 376 ret = -EFAULT; 377 } else { 378 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev); 379 380 ccw_dstream_advance(&sch->cds, sizeof(features.features)); 381 ret = ccw_dstream_read(&sch->cds, features.index); 382 if (ret) { 383 break; 384 } 385 if (features.index == 0) { 386 if (dev->revision >= 1) { 387 /* Don't offer legacy features for modern devices. */ 388 features.features = (uint32_t) 389 (vdev->host_features & ~vdc->legacy_features); 390 } else { 391 features.features = (uint32_t)vdev->host_features; 392 } 393 } else if ((features.index == 1) && (dev->revision >= 1)) { 394 /* 395 * Only offer feature bits beyond 31 if the guest has 396 * negotiated at least revision 1. 397 */ 398 features.features = (uint32_t)(vdev->host_features >> 32); 399 } else { 400 /* Return zeroes if the guest supports more feature bits. */ 401 features.features = 0; 402 } 403 ccw_dstream_rewind(&sch->cds); 404 features.features = cpu_to_le32(features.features); 405 ret = ccw_dstream_write(&sch->cds, features.features); 406 if (!ret) { 407 sch->curr_status.scsw.count = ccw.count - sizeof(features); 408 } 409 } 410 break; 411 case CCW_CMD_WRITE_FEAT: 412 if (check_len) { 413 if (ccw.count != sizeof(features)) { 414 ret = -EINVAL; 415 break; 416 } 417 } else if (ccw.count < sizeof(features)) { 418 /* Can't execute command. */ 419 ret = -EINVAL; 420 break; 421 } 422 if (!ccw.cda) { 423 ret = -EFAULT; 424 } else { 425 ret = ccw_dstream_read(&sch->cds, features); 426 if (ret) { 427 break; 428 } 429 features.features = le32_to_cpu(features.features); 430 if (features.index == 0) { 431 virtio_set_features(vdev, 432 (vdev->guest_features & 0xffffffff00000000ULL) | 433 features.features); 434 } else if ((features.index == 1) && (dev->revision >= 1)) { 435 /* 436 * If the guest did not negotiate at least revision 1, 437 * we did not offer it any feature bits beyond 31. Such a 438 * guest passing us any bit here is therefore buggy. 439 */ 440 virtio_set_features(vdev, 441 (vdev->guest_features & 0x00000000ffffffffULL) | 442 ((uint64_t)features.features << 32)); 443 } else { 444 /* 445 * If the guest supports more feature bits, assert that it 446 * passes us zeroes for those we don't support. 447 */ 448 if (features.features) { 449 qemu_log_mask(LOG_GUEST_ERROR, 450 "Guest bug: features[%i]=%x (expected 0)", 451 features.index, features.features); 452 /* XXX: do a unit check here? */ 453 } 454 } 455 sch->curr_status.scsw.count = ccw.count - sizeof(features); 456 ret = 0; 457 } 458 break; 459 case CCW_CMD_READ_CONF: 460 if (check_len) { 461 if (ccw.count > vdev->config_len) { 462 ret = -EINVAL; 463 break; 464 } 465 } 466 len = MIN(ccw.count, vdev->config_len); 467 if (!ccw.cda) { 468 ret = -EFAULT; 469 } else { 470 virtio_bus_get_vdev_config(&dev->bus, vdev->config); 471 ret = ccw_dstream_write_buf(&sch->cds, vdev->config, len); 472 if (ret) { 473 sch->curr_status.scsw.count = ccw.count - len; 474 } 475 } 476 break; 477 case CCW_CMD_WRITE_CONF: 478 if (check_len) { 479 if (ccw.count > vdev->config_len) { 480 ret = -EINVAL; 481 break; 482 } 483 } 484 len = MIN(ccw.count, vdev->config_len); 485 if (!ccw.cda) { 486 ret = -EFAULT; 487 } else { 488 ret = ccw_dstream_read_buf(&sch->cds, vdev->config, len); 489 if (!ret) { 490 virtio_bus_set_vdev_config(&dev->bus, vdev->config); 491 sch->curr_status.scsw.count = ccw.count - len; 492 } 493 } 494 break; 495 case CCW_CMD_READ_STATUS: 496 if (check_len) { 497 if (ccw.count != sizeof(status)) { 498 ret = -EINVAL; 499 break; 500 } 501 } else if (ccw.count < sizeof(status)) { 502 /* Can't execute command. */ 503 ret = -EINVAL; 504 break; 505 } 506 if (!ccw.cda) { 507 ret = -EFAULT; 508 } else { 509 address_space_stb(&address_space_memory, ccw.cda, vdev->status, 510 MEMTXATTRS_UNSPECIFIED, NULL); 511 sch->curr_status.scsw.count = ccw.count - sizeof(vdev->status); 512 ret = 0; 513 } 514 break; 515 case CCW_CMD_WRITE_STATUS: 516 if (check_len) { 517 if (ccw.count != sizeof(status)) { 518 ret = -EINVAL; 519 break; 520 } 521 } else if (ccw.count < sizeof(status)) { 522 /* Can't execute command. */ 523 ret = -EINVAL; 524 break; 525 } 526 if (!ccw.cda) { 527 ret = -EFAULT; 528 } else { 529 ret = ccw_dstream_read(&sch->cds, status); 530 if (ret) { 531 break; 532 } 533 if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { 534 virtio_ccw_stop_ioeventfd(dev); 535 } 536 if (virtio_set_status(vdev, status) == 0) { 537 if (vdev->status == 0) { 538 virtio_ccw_reset_virtio(dev); 539 } 540 if (status & VIRTIO_CONFIG_S_DRIVER_OK) { 541 virtio_ccw_start_ioeventfd(dev); 542 } 543 sch->curr_status.scsw.count = ccw.count - sizeof(status); 544 ret = 0; 545 } else { 546 /* Trigger a command reject. */ 547 ret = -ENOSYS; 548 } 549 } 550 break; 551 case CCW_CMD_SET_IND: 552 if (check_len) { 553 if (ccw.count != sizeof(indicators)) { 554 ret = -EINVAL; 555 break; 556 } 557 } else if (ccw.count < sizeof(indicators)) { 558 /* Can't execute command. */ 559 ret = -EINVAL; 560 break; 561 } 562 if (sch->thinint_active) { 563 /* Trigger a command reject. */ 564 ret = -ENOSYS; 565 break; 566 } 567 if (virtio_get_num_queues(vdev) > NR_CLASSIC_INDICATOR_BITS) { 568 /* More queues than indicator bits --> trigger a reject */ 569 ret = -ENOSYS; 570 break; 571 } 572 if (!ccw.cda) { 573 ret = -EFAULT; 574 } else { 575 ret = ccw_dstream_read(&sch->cds, indicators); 576 if (ret) { 577 break; 578 } 579 indicators = be64_to_cpu(indicators); 580 dev->indicators = get_indicator(indicators, sizeof(uint64_t)); 581 sch->curr_status.scsw.count = ccw.count - sizeof(indicators); 582 ret = 0; 583 } 584 break; 585 case CCW_CMD_SET_CONF_IND: 586 if (check_len) { 587 if (ccw.count != sizeof(indicators)) { 588 ret = -EINVAL; 589 break; 590 } 591 } else if (ccw.count < sizeof(indicators)) { 592 /* Can't execute command. */ 593 ret = -EINVAL; 594 break; 595 } 596 if (!ccw.cda) { 597 ret = -EFAULT; 598 } else { 599 ret = ccw_dstream_read(&sch->cds, indicators); 600 if (ret) { 601 break; 602 } 603 indicators = be64_to_cpu(indicators); 604 dev->indicators2 = get_indicator(indicators, sizeof(uint64_t)); 605 sch->curr_status.scsw.count = ccw.count - sizeof(indicators); 606 ret = 0; 607 } 608 break; 609 case CCW_CMD_READ_VQ_CONF: 610 if (check_len) { 611 if (ccw.count != sizeof(vq_config)) { 612 ret = -EINVAL; 613 break; 614 } 615 } else if (ccw.count < sizeof(vq_config)) { 616 /* Can't execute command. */ 617 ret = -EINVAL; 618 break; 619 } 620 if (!ccw.cda) { 621 ret = -EFAULT; 622 } else { 623 ret = ccw_dstream_read(&sch->cds, vq_config.index); 624 if (ret) { 625 break; 626 } 627 vq_config.index = be16_to_cpu(vq_config.index); 628 if (vq_config.index >= VIRTIO_QUEUE_MAX) { 629 ret = -EINVAL; 630 break; 631 } 632 vq_config.num_max = virtio_queue_get_num(vdev, 633 vq_config.index); 634 vq_config.num_max = cpu_to_be16(vq_config.num_max); 635 ret = ccw_dstream_write(&sch->cds, vq_config.num_max); 636 if (!ret) { 637 sch->curr_status.scsw.count = ccw.count - sizeof(vq_config); 638 } 639 } 640 break; 641 case CCW_CMD_SET_IND_ADAPTER: 642 if (check_len) { 643 if (ccw.count != sizeof(thinint)) { 644 ret = -EINVAL; 645 break; 646 } 647 } else if (ccw.count < sizeof(thinint)) { 648 /* Can't execute command. */ 649 ret = -EINVAL; 650 break; 651 } 652 if (!ccw.cda) { 653 ret = -EFAULT; 654 } else if (dev->indicators && !sch->thinint_active) { 655 /* Trigger a command reject. */ 656 ret = -ENOSYS; 657 } else { 658 if (ccw_dstream_read(&sch->cds, thinint)) { 659 ret = -EFAULT; 660 } else { 661 thinint.ind_bit = be64_to_cpu(thinint.ind_bit); 662 thinint.summary_indicator = 663 be64_to_cpu(thinint.summary_indicator); 664 thinint.device_indicator = 665 be64_to_cpu(thinint.device_indicator); 666 667 dev->summary_indicator = 668 get_indicator(thinint.summary_indicator, sizeof(uint8_t)); 669 dev->indicators = 670 get_indicator(thinint.device_indicator, 671 thinint.ind_bit / 8 + 1); 672 dev->thinint_isc = thinint.isc; 673 dev->routes.adapter.ind_offset = thinint.ind_bit; 674 dev->routes.adapter.summary_offset = 7; 675 dev->routes.adapter.adapter_id = css_get_adapter_id( 676 CSS_IO_ADAPTER_VIRTIO, 677 dev->thinint_isc); 678 sch->thinint_active = ((dev->indicators != NULL) && 679 (dev->summary_indicator != NULL)); 680 sch->curr_status.scsw.count = ccw.count - sizeof(thinint); 681 ret = 0; 682 } 683 } 684 break; 685 case CCW_CMD_SET_VIRTIO_REV: 686 len = sizeof(revinfo); 687 if (ccw.count < len) { 688 ret = -EINVAL; 689 break; 690 } 691 if (!ccw.cda) { 692 ret = -EFAULT; 693 break; 694 } 695 ret = ccw_dstream_read_buf(&sch->cds, &revinfo, 4); 696 if (ret < 0) { 697 break; 698 } 699 revinfo.revision = be16_to_cpu(revinfo.revision); 700 revinfo.length = be16_to_cpu(revinfo.length); 701 if (ccw.count < len + revinfo.length || 702 (check_len && ccw.count > len + revinfo.length)) { 703 ret = -EINVAL; 704 break; 705 } 706 /* 707 * Once we start to support revisions with additional data, we'll 708 * need to fetch it here. Nothing to do for now, though. 709 */ 710 if (dev->revision >= 0 || 711 revinfo.revision > virtio_ccw_rev_max(dev) || 712 (dev->force_revision_1 && !revinfo.revision)) { 713 ret = -ENOSYS; 714 break; 715 } 716 ret = 0; 717 dev->revision = revinfo.revision; 718 break; 719 default: 720 ret = -ENOSYS; 721 break; 722 } 723 return ret; 724 } 725 726 static void virtio_sch_disable_cb(SubchDev *sch) 727 { 728 VirtioCcwDevice *dev = sch->driver_data; 729 730 dev->revision = -1; 731 } 732 733 static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) 734 { 735 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 736 CcwDevice *ccw_dev = CCW_DEVICE(dev); 737 CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev); 738 SubchDev *sch; 739 Error *err = NULL; 740 int i; 741 742 sch = css_create_sch(ccw_dev->devno, errp); 743 if (!sch) { 744 return; 745 } 746 if (!virtio_ccw_rev_max(dev) && dev->force_revision_1) { 747 error_setg(&err, "Invalid value of property max_rev " 748 "(is %d expected >= 1)", virtio_ccw_rev_max(dev)); 749 goto out_err; 750 } 751 752 sch->driver_data = dev; 753 sch->ccw_cb = virtio_ccw_cb; 754 sch->disable_cb = virtio_sch_disable_cb; 755 sch->id.reserved = 0xff; 756 sch->id.cu_type = VIRTIO_CCW_CU_TYPE; 757 sch->do_subchannel_work = do_subchannel_work_virtual; 758 sch->irb_cb = build_irb_virtual; 759 ccw_dev->sch = sch; 760 dev->indicators = NULL; 761 dev->revision = -1; 762 for (i = 0; i < ADAPTER_ROUTES_MAX_GSI; i++) { 763 dev->routes.gsi[i] = -1; 764 } 765 css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE); 766 767 trace_virtio_ccw_new_device( 768 sch->cssid, sch->ssid, sch->schid, sch->devno, 769 ccw_dev->devno.valid ? "user-configured" : "auto-configured"); 770 771 if (kvm_enabled() && !kvm_eventfds_enabled()) { 772 dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD; 773 } 774 775 /* fd-based ioevents can't be synchronized in record/replay */ 776 if (replay_mode != REPLAY_MODE_NONE) { 777 dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD; 778 } 779 780 if (k->realize) { 781 k->realize(dev, &err); 782 if (err) { 783 goto out_err; 784 } 785 } 786 787 ck->realize(ccw_dev, &err); 788 if (err) { 789 goto out_err; 790 } 791 792 return; 793 794 out_err: 795 error_propagate(errp, err); 796 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); 797 ccw_dev->sch = NULL; 798 g_free(sch); 799 } 800 801 static void virtio_ccw_device_unrealize(VirtioCcwDevice *dev) 802 { 803 VirtIOCCWDeviceClass *dc = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 804 CcwDevice *ccw_dev = CCW_DEVICE(dev); 805 SubchDev *sch = ccw_dev->sch; 806 807 if (dc->unrealize) { 808 dc->unrealize(dev); 809 } 810 811 if (sch) { 812 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); 813 g_free(sch); 814 ccw_dev->sch = NULL; 815 } 816 if (dev->indicators) { 817 release_indicator(&dev->routes.adapter, dev->indicators); 818 dev->indicators = NULL; 819 } 820 } 821 822 /* DeviceState to VirtioCcwDevice. Note: used on datapath, 823 * be careful and test performance if you change this. 824 */ 825 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d) 826 { 827 CcwDevice *ccw_dev = to_ccw_dev_fast(d); 828 829 return container_of(ccw_dev, VirtioCcwDevice, parent_obj); 830 } 831 832 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc, 833 uint8_t to_be_set) 834 { 835 uint8_t expected, actual; 836 hwaddr len = 1; 837 /* avoid multiple fetches */ 838 uint8_t volatile *ind_addr; 839 840 ind_addr = cpu_physical_memory_map(ind_loc, &len, true); 841 if (!ind_addr) { 842 error_report("%s(%x.%x.%04x): unable to access indicator", 843 __func__, sch->cssid, sch->ssid, sch->schid); 844 return -1; 845 } 846 actual = *ind_addr; 847 do { 848 expected = actual; 849 actual = qatomic_cmpxchg(ind_addr, expected, expected | to_be_set); 850 } while (actual != expected); 851 trace_virtio_ccw_set_ind(ind_loc, actual, actual | to_be_set); 852 cpu_physical_memory_unmap((void *)ind_addr, len, 1, len); 853 854 return actual; 855 } 856 857 static void virtio_ccw_notify(DeviceState *d, uint16_t vector) 858 { 859 VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d); 860 CcwDevice *ccw_dev = to_ccw_dev_fast(d); 861 SubchDev *sch = ccw_dev->sch; 862 uint64_t indicators; 863 864 if (vector == VIRTIO_NO_VECTOR) { 865 return; 866 } 867 /* 868 * vector < VIRTIO_QUEUE_MAX: notification for a virtqueue 869 * vector == VIRTIO_QUEUE_MAX: configuration change notification 870 * bits beyond that are unused and should never be notified for 871 */ 872 assert(vector <= VIRTIO_QUEUE_MAX); 873 874 if (vector < VIRTIO_QUEUE_MAX) { 875 if (!dev->indicators) { 876 return; 877 } 878 if (sch->thinint_active) { 879 /* 880 * In the adapter interrupt case, indicators points to a 881 * memory area that may be (way) larger than 64 bit and 882 * ind_bit indicates the start of the indicators in a big 883 * endian notation. 884 */ 885 uint64_t ind_bit = dev->routes.adapter.ind_offset; 886 887 virtio_set_ind_atomic(sch, dev->indicators->addr + 888 (ind_bit + vector) / 8, 889 0x80 >> ((ind_bit + vector) % 8)); 890 if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr, 891 0x01)) { 892 css_adapter_interrupt(CSS_IO_ADAPTER_VIRTIO, dev->thinint_isc); 893 } 894 } else { 895 assert(vector < NR_CLASSIC_INDICATOR_BITS); 896 indicators = address_space_ldq(&address_space_memory, 897 dev->indicators->addr, 898 MEMTXATTRS_UNSPECIFIED, 899 NULL); 900 indicators |= 1ULL << vector; 901 address_space_stq(&address_space_memory, dev->indicators->addr, 902 indicators, MEMTXATTRS_UNSPECIFIED, NULL); 903 css_conditional_io_interrupt(sch); 904 } 905 } else { 906 if (!dev->indicators2) { 907 return; 908 } 909 indicators = address_space_ldq(&address_space_memory, 910 dev->indicators2->addr, 911 MEMTXATTRS_UNSPECIFIED, 912 NULL); 913 indicators |= 1ULL; 914 address_space_stq(&address_space_memory, dev->indicators2->addr, 915 indicators, MEMTXATTRS_UNSPECIFIED, NULL); 916 css_conditional_io_interrupt(sch); 917 } 918 } 919 920 static void virtio_ccw_reset(DeviceState *d) 921 { 922 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 923 VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 924 925 virtio_ccw_reset_virtio(dev); 926 if (vdc->parent_reset) { 927 vdc->parent_reset(d); 928 } 929 } 930 931 static void virtio_ccw_vmstate_change(DeviceState *d, bool running) 932 { 933 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 934 935 if (running) { 936 virtio_ccw_start_ioeventfd(dev); 937 } else { 938 virtio_ccw_stop_ioeventfd(dev); 939 } 940 } 941 942 static bool virtio_ccw_query_guest_notifiers(DeviceState *d) 943 { 944 CcwDevice *dev = CCW_DEVICE(d); 945 946 return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA); 947 } 948 949 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev) 950 { 951 int r; 952 CcwDevice *ccw_dev = CCW_DEVICE(dev); 953 954 if (!ccw_dev->sch->thinint_active) { 955 return -EINVAL; 956 } 957 958 r = map_indicator(&dev->routes.adapter, dev->summary_indicator); 959 if (r) { 960 return r; 961 } 962 r = map_indicator(&dev->routes.adapter, dev->indicators); 963 if (r) { 964 return r; 965 } 966 dev->routes.adapter.summary_addr = dev->summary_indicator->map; 967 dev->routes.adapter.ind_addr = dev->indicators->map; 968 969 return 0; 970 } 971 972 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs) 973 { 974 int i; 975 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 976 int ret; 977 S390FLICState *fs = s390_get_flic(); 978 S390FLICStateClass *fsc = s390_get_flic_class(fs); 979 980 ret = virtio_ccw_get_mappings(dev); 981 if (ret) { 982 return ret; 983 } 984 for (i = 0; i < nvqs; i++) { 985 if (!virtio_queue_get_num(vdev, i)) { 986 break; 987 } 988 } 989 dev->routes.num_routes = i; 990 return fsc->add_adapter_routes(fs, &dev->routes); 991 } 992 993 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs) 994 { 995 S390FLICState *fs = s390_get_flic(); 996 S390FLICStateClass *fsc = s390_get_flic_class(fs); 997 998 fsc->release_adapter_routes(fs, &dev->routes); 999 } 1000 1001 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n) 1002 { 1003 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1004 VirtQueue *vq = virtio_get_queue(vdev, n); 1005 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1006 1007 return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, notifier, NULL, 1008 dev->routes.gsi[n]); 1009 } 1010 1011 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n) 1012 { 1013 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1014 VirtQueue *vq = virtio_get_queue(vdev, n); 1015 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1016 int ret; 1017 1018 ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, notifier, 1019 dev->routes.gsi[n]); 1020 assert(ret == 0); 1021 } 1022 1023 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n, 1024 bool assign, bool with_irqfd) 1025 { 1026 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1027 VirtQueue *vq = virtio_get_queue(vdev, n); 1028 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1029 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 1030 1031 if (assign) { 1032 int r = event_notifier_init(notifier, 0); 1033 1034 if (r < 0) { 1035 return r; 1036 } 1037 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); 1038 if (with_irqfd) { 1039 r = virtio_ccw_add_irqfd(dev, n); 1040 if (r) { 1041 virtio_queue_set_guest_notifier_fd_handler(vq, false, 1042 with_irqfd); 1043 return r; 1044 } 1045 } 1046 /* 1047 * We do not support individual masking for channel devices, so we 1048 * need to manually trigger any guest masking callbacks here. 1049 */ 1050 if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) { 1051 k->guest_notifier_mask(vdev, n, false); 1052 } 1053 /* get lost events and re-inject */ 1054 if (k->guest_notifier_pending && 1055 k->guest_notifier_pending(vdev, n)) { 1056 event_notifier_set(notifier); 1057 } 1058 } else { 1059 if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) { 1060 k->guest_notifier_mask(vdev, n, true); 1061 } 1062 if (with_irqfd) { 1063 virtio_ccw_remove_irqfd(dev, n); 1064 } 1065 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); 1066 event_notifier_cleanup(notifier); 1067 } 1068 return 0; 1069 } 1070 1071 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs, 1072 bool assigned) 1073 { 1074 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1075 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1076 CcwDevice *ccw_dev = CCW_DEVICE(d); 1077 bool with_irqfd = ccw_dev->sch->thinint_active && kvm_irqfds_enabled(); 1078 int r, n; 1079 1080 if (with_irqfd && assigned) { 1081 /* irq routes need to be set up before assigning irqfds */ 1082 r = virtio_ccw_setup_irqroutes(dev, nvqs); 1083 if (r < 0) { 1084 goto irqroute_error; 1085 } 1086 } 1087 for (n = 0; n < nvqs; n++) { 1088 if (!virtio_queue_get_num(vdev, n)) { 1089 break; 1090 } 1091 r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd); 1092 if (r < 0) { 1093 goto assign_error; 1094 } 1095 } 1096 if (with_irqfd && !assigned) { 1097 /* release irq routes after irqfds have been released */ 1098 virtio_ccw_release_irqroutes(dev, nvqs); 1099 } 1100 return 0; 1101 1102 assign_error: 1103 while (--n >= 0) { 1104 virtio_ccw_set_guest_notifier(dev, n, !assigned, false); 1105 } 1106 irqroute_error: 1107 if (with_irqfd && assigned) { 1108 virtio_ccw_release_irqroutes(dev, nvqs); 1109 } 1110 return r; 1111 } 1112 1113 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f) 1114 { 1115 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1116 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1117 1118 qemu_put_be16(f, virtio_queue_vector(vdev, n)); 1119 } 1120 1121 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f) 1122 { 1123 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1124 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1125 uint16_t vector; 1126 1127 qemu_get_be16s(f, &vector); 1128 virtio_queue_set_vector(vdev, n , vector); 1129 1130 return 0; 1131 } 1132 1133 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f) 1134 { 1135 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1136 vmstate_save_state(f, &vmstate_virtio_ccw_dev, dev, NULL); 1137 } 1138 1139 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f) 1140 { 1141 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1142 return vmstate_load_state(f, &vmstate_virtio_ccw_dev, dev, 1); 1143 } 1144 1145 static void virtio_ccw_pre_plugged(DeviceState *d, Error **errp) 1146 { 1147 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1148 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1149 1150 if (dev->max_rev >= 1) { 1151 virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1); 1152 } 1153 } 1154 1155 /* This is called by virtio-bus just after the device is plugged. */ 1156 static void virtio_ccw_device_plugged(DeviceState *d, Error **errp) 1157 { 1158 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1159 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1160 CcwDevice *ccw_dev = CCW_DEVICE(d); 1161 SubchDev *sch = ccw_dev->sch; 1162 int n = virtio_get_num_queues(vdev); 1163 S390FLICState *flic = s390_get_flic(); 1164 1165 if (!virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) { 1166 dev->max_rev = 0; 1167 } 1168 1169 if (!virtio_ccw_rev_max(dev) && !virtio_legacy_allowed(vdev)) { 1170 /* 1171 * To avoid migration issues, we allow legacy mode when legacy 1172 * check is disabled in the old machine types (< 5.1). 1173 */ 1174 if (virtio_legacy_check_disabled(vdev)) { 1175 warn_report("device requires revision >= 1, but for backward " 1176 "compatibility max_revision=0 is allowed"); 1177 } else { 1178 error_setg(errp, "Invalid value of property max_rev " 1179 "(is %d expected >= 1)", virtio_ccw_rev_max(dev)); 1180 return; 1181 } 1182 } 1183 1184 if (virtio_get_num_queues(vdev) > VIRTIO_QUEUE_MAX) { 1185 error_setg(errp, "The number of virtqueues %d " 1186 "exceeds virtio limit %d", n, 1187 VIRTIO_QUEUE_MAX); 1188 return; 1189 } 1190 if (virtio_get_num_queues(vdev) > flic->adapter_routes_max_batch) { 1191 error_setg(errp, "The number of virtqueues %d " 1192 "exceeds flic adapter route limit %d", n, 1193 flic->adapter_routes_max_batch); 1194 return; 1195 } 1196 1197 sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus); 1198 1199 1200 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1201 d->hotplugged, 1); 1202 } 1203 1204 static void virtio_ccw_device_unplugged(DeviceState *d) 1205 { 1206 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1207 1208 virtio_ccw_stop_ioeventfd(dev); 1209 } 1210 /**************** Virtio-ccw Bus Device Descriptions *******************/ 1211 1212 static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp) 1213 { 1214 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1215 1216 virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev); 1217 virtio_ccw_device_realize(_dev, errp); 1218 } 1219 1220 static void virtio_ccw_busdev_unrealize(DeviceState *dev) 1221 { 1222 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1223 1224 virtio_ccw_device_unrealize(_dev); 1225 } 1226 1227 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev, 1228 DeviceState *dev, Error **errp) 1229 { 1230 VirtioCcwDevice *_dev = to_virtio_ccw_dev_fast(dev); 1231 1232 virtio_ccw_stop_ioeventfd(_dev); 1233 } 1234 1235 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data) 1236 { 1237 DeviceClass *dc = DEVICE_CLASS(klass); 1238 CCWDeviceClass *k = CCW_DEVICE_CLASS(dc); 1239 VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_CLASS(klass); 1240 1241 k->unplug = virtio_ccw_busdev_unplug; 1242 dc->realize = virtio_ccw_busdev_realize; 1243 dc->unrealize = virtio_ccw_busdev_unrealize; 1244 device_class_set_parent_reset(dc, virtio_ccw_reset, &vdc->parent_reset); 1245 } 1246 1247 static const TypeInfo virtio_ccw_device_info = { 1248 .name = TYPE_VIRTIO_CCW_DEVICE, 1249 .parent = TYPE_CCW_DEVICE, 1250 .instance_size = sizeof(VirtioCcwDevice), 1251 .class_init = virtio_ccw_device_class_init, 1252 .class_size = sizeof(VirtIOCCWDeviceClass), 1253 .abstract = true, 1254 }; 1255 1256 /* virtio-ccw-bus */ 1257 1258 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, 1259 VirtioCcwDevice *dev) 1260 { 1261 DeviceState *qdev = DEVICE(dev); 1262 char virtio_bus_name[] = "virtio-bus"; 1263 1264 qbus_init(bus, bus_size, TYPE_VIRTIO_CCW_BUS, qdev, virtio_bus_name); 1265 } 1266 1267 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data) 1268 { 1269 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 1270 BusClass *bus_class = BUS_CLASS(klass); 1271 1272 bus_class->max_dev = 1; 1273 k->notify = virtio_ccw_notify; 1274 k->vmstate_change = virtio_ccw_vmstate_change; 1275 k->query_guest_notifiers = virtio_ccw_query_guest_notifiers; 1276 k->set_guest_notifiers = virtio_ccw_set_guest_notifiers; 1277 k->save_queue = virtio_ccw_save_queue; 1278 k->load_queue = virtio_ccw_load_queue; 1279 k->save_config = virtio_ccw_save_config; 1280 k->load_config = virtio_ccw_load_config; 1281 k->pre_plugged = virtio_ccw_pre_plugged; 1282 k->device_plugged = virtio_ccw_device_plugged; 1283 k->device_unplugged = virtio_ccw_device_unplugged; 1284 k->ioeventfd_enabled = virtio_ccw_ioeventfd_enabled; 1285 k->ioeventfd_assign = virtio_ccw_ioeventfd_assign; 1286 } 1287 1288 static const TypeInfo virtio_ccw_bus_info = { 1289 .name = TYPE_VIRTIO_CCW_BUS, 1290 .parent = TYPE_VIRTIO_BUS, 1291 .instance_size = sizeof(VirtioCcwBusState), 1292 .class_size = sizeof(VirtioCcwBusClass), 1293 .class_init = virtio_ccw_bus_class_init, 1294 }; 1295 1296 static void virtio_ccw_register(void) 1297 { 1298 type_register_static(&virtio_ccw_bus_info); 1299 type_register_static(&virtio_ccw_device_info); 1300 } 1301 1302 type_init(virtio_ccw_register)