hw/s390x/s390-pci-bus.c

   1 /*
   2  * s390 PCI BUS
   3  *
   4  * Copyright 2014 IBM Corp.
   5  * Author(s): Frank Blaschka <frank.blaschka@de.ibm.com>
   6  *            Hong Bo Li <lihbbj@cn.ibm.com>
   7  *            Yi Min Zhao <zyimin@cn.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or (at
  10  * your option) any later version. See the COPYING file in the top-level
  11  * directory.
  12  */
  13
  14 #include "qemu/osdep.h"
  15 #include "qemu-common.h"
  16 #include "cpu.h"
  17 #include "s390-pci-bus.h"
  18 #include "s390-pci-inst.h"
  19 #include <hw/pci/pci_bus.h>
  20 #include <hw/pci/msi.h>
  21 #include <qemu/error-report.h>
  22
  23 /* #define DEBUG_S390PCI_BUS */
  24 #ifdef DEBUG_S390PCI_BUS
  25 #define DPRINTF(fmt, ...) \
  26     do { fprintf(stderr, "S390pci-bus: " fmt, ## __VA_ARGS__); } while (0)
  27 #else
  28 #define DPRINTF(fmt, ...) \
  29     do { } while (0)
  30 #endif
  31
  32 static S390pciState *s390_get_phb(void)
  33 {
  34     static S390pciState *phb;
  35
  36     if (!phb) {
  37         phb = S390_PCI_HOST_BRIDGE(
  38             object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
  39         assert(phb != NULL);
  40     }
  41
  42     return phb;
  43 }
  44
  45 int chsc_sei_nt2_get_event(void *res)
  46 {
  47     ChscSeiNt2Res *nt2_res = (ChscSeiNt2Res *)res;
  48     PciCcdfAvail *accdf;
  49     PciCcdfErr *eccdf;
  50     int rc = 1;
  51     SeiContainer *sei_cont;
  52     S390pciState *s = s390_get_phb();
  53
  54     sei_cont = QTAILQ_FIRST(&s->pending_sei);
  55     if (sei_cont) {
  56         QTAILQ_REMOVE(&s->pending_sei, sei_cont, link);
  57         nt2_res->nt = 2;
  58         nt2_res->cc = sei_cont->cc;
  59         nt2_res->length = cpu_to_be16(sizeof(ChscSeiNt2Res));
  60         switch (sei_cont->cc) {
  61         case 1: /* error event */
  62             eccdf = (PciCcdfErr *)nt2_res->ccdf;
  63             eccdf->fid = cpu_to_be32(sei_cont->fid);
  64             eccdf->fh = cpu_to_be32(sei_cont->fh);
  65             eccdf->e = cpu_to_be32(sei_cont->e);
  66             eccdf->faddr = cpu_to_be64(sei_cont->faddr);
  67             eccdf->pec = cpu_to_be16(sei_cont->pec);
  68             break;
  69         case 2: /* availability event */
  70             accdf = (PciCcdfAvail *)nt2_res->ccdf;
  71             accdf->fid = cpu_to_be32(sei_cont->fid);
  72             accdf->fh = cpu_to_be32(sei_cont->fh);
  73             accdf->pec = cpu_to_be16(sei_cont->pec);
  74             break;
  75         default:
  76             abort();
  77         }
  78         g_free(sei_cont);
  79         rc = 0;
  80     }
  81
  82     return rc;
  83 }
  84
  85 int chsc_sei_nt2_have_event(void)
  86 {
  87     S390pciState *s = s390_get_phb();
  88
  89     return !QTAILQ_EMPTY(&s->pending_sei);
  90 }
  91
  92 S390PCIBusDevice *s390_pci_find_dev_by_fid(uint32_t fid)
  93 {
  94     S390PCIBusDevice *pbdev;
  95     int i;
  96     S390pciState *s = s390_get_phb();
  97
  98     for (i = 0; i < PCI_SLOT_MAX; i++) {
  99         pbdev = &s->pbdev[i];
 100         if ((pbdev->fh != 0) && (pbdev->fid == fid)) {
 101             return pbdev;
 102         }
 103     }
 104
 105     return NULL;
 106 }
 107
 108 void s390_pci_sclp_configure(SCCB *sccb)
 109 {
 110     PciCfgSccb *psccb = (PciCfgSccb *)sccb;
 111     S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(be32_to_cpu(psccb->aid));
 112     uint16_t rc;
 113
 114     if (be16_to_cpu(sccb->h.length) < 16) {
 115         rc = SCLP_RC_INSUFFICIENT_SCCB_LENGTH;
 116         goto out;
 117     }
 118
 119     if (!pbdev) {
 120         DPRINTF("sclp config no dev found\n");
 121         rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED;
 122         goto out;
 123     }
 124
 125     switch (pbdev->state) {
 126     case ZPCI_FS_RESERVED:
 127         rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE;
 128         break;
 129     case ZPCI_FS_STANDBY:
 130         pbdev->state = ZPCI_FS_DISABLED;
 131         rc = SCLP_RC_NORMAL_COMPLETION;
 132         break;
 133     default:
 134         rc = SCLP_RC_NO_ACTION_REQUIRED;
 135     }
 136 out:
 137     psccb->header.response_code = cpu_to_be16(rc);
 138 }
 139
 140 void s390_pci_sclp_deconfigure(SCCB *sccb)
 141 {
 142     PciCfgSccb *psccb = (PciCfgSccb *)sccb;
 143     S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(be32_to_cpu(psccb->aid));
 144     uint16_t rc;
 145
 146     if (be16_to_cpu(sccb->h.length) < 16) {
 147         rc = SCLP_RC_INSUFFICIENT_SCCB_LENGTH;
 148         goto out;
 149     }
 150
 151     if (!pbdev) {
 152         DPRINTF("sclp deconfig no dev found\n");
 153         rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED;
 154         goto out;
 155     }
 156
 157     switch (pbdev->state) {
 158     case ZPCI_FS_RESERVED:
 159         rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE;
 160         break;
 161     case ZPCI_FS_STANDBY:
 162         rc = SCLP_RC_NO_ACTION_REQUIRED;
 163         break;
 164     default:
 165         if (pbdev->summary_ind) {
 166             pci_dereg_irqs(pbdev);
 167         }
 168         if (pbdev->iommu_enabled) {
 169             pci_dereg_ioat(pbdev);
 170         }
 171         pbdev->state = ZPCI_FS_STANDBY;
 172         rc = SCLP_RC_NORMAL_COMPLETION;
 173     }
 174 out:
 175     psccb->header.response_code = cpu_to_be16(rc);
 176 }
 177
 178 static uint32_t s390_pci_get_pfid(PCIDevice *pdev)
 179 {
 180     return PCI_SLOT(pdev->devfn);
 181 }
 182
 183 static uint32_t s390_pci_get_pfh(PCIDevice *pdev)
 184 {
 185     return PCI_SLOT(pdev->devfn) | FH_SHM_VFIO;
 186 }
 187
 188 S390PCIBusDevice *s390_pci_find_dev_by_idx(uint32_t idx)
 189 {
 190     S390PCIBusDevice *pbdev;
 191     int i;
 192     int j = 0;
 193     S390pciState *s = s390_get_phb();
 194
 195     for (i = 0; i < PCI_SLOT_MAX; i++) {
 196         pbdev = &s->pbdev[i];
 197
 198         if (pbdev->state == ZPCI_FS_RESERVED) {
 199             continue;
 200         }
 201
 202         if (j == idx) {
 203             return pbdev;
 204         }
 205         j++;
 206     }
 207
 208     return NULL;
 209 }
 210
 211 S390PCIBusDevice *s390_pci_find_dev_by_fh(uint32_t fh)
 212 {
 213     S390pciState *s = s390_get_phb();
 214     S390PCIBusDevice *pbdev;
 215
 216     pbdev = &s->pbdev[fh & FH_MASK_INDEX];
 217     if (pbdev->fh != 0 && pbdev->fh == fh) {
 218         return pbdev;
 219     }
 220
 221     return NULL;
 222 }
 223
 224 static void s390_pci_generate_event(uint8_t cc, uint16_t pec, uint32_t fh,
 225                                     uint32_t fid, uint64_t faddr, uint32_t e)
 226 {
 227     SeiContainer *sei_cont;
 228     S390pciState *s = s390_get_phb();
 229
 230     sei_cont = g_malloc0(sizeof(SeiContainer));
 231     sei_cont->fh = fh;
 232     sei_cont->fid = fid;
 233     sei_cont->cc = cc;
 234     sei_cont->pec = pec;
 235     sei_cont->faddr = faddr;
 236     sei_cont->e = e;
 237
 238     QTAILQ_INSERT_TAIL(&s->pending_sei, sei_cont, link);
 239     css_generate_css_crws(0);
 240 }
 241
 242 static void s390_pci_generate_plug_event(uint16_t pec, uint32_t fh,
 243                                          uint32_t fid)
 244 {
 245     s390_pci_generate_event(2, pec, fh, fid, 0, 0);
 246 }
 247
 248 void s390_pci_generate_error_event(uint16_t pec, uint32_t fh, uint32_t fid,
 249                                    uint64_t faddr, uint32_t e)
 250 {
 251     s390_pci_generate_event(1, pec, fh, fid, faddr, e);
 252 }
 253
 254 static void s390_pci_set_irq(void *opaque, int irq, int level)
 255 {
 256     /* nothing to do */
 257 }
 258
 259 static int s390_pci_map_irq(PCIDevice *pci_dev, int irq_num)
 260 {
 261     /* nothing to do */
 262     return 0;
 263 }
 264
 265 static uint64_t s390_pci_get_table_origin(uint64_t iota)
 266 {
 267     return iota & ~ZPCI_IOTA_RTTO_FLAG;
 268 }
 269
 270 static unsigned int calc_rtx(dma_addr_t ptr)
 271 {
 272     return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK;
 273 }
 274
 275 static unsigned int calc_sx(dma_addr_t ptr)
 276 {
 277     return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK;
 278 }
 279
 280 static unsigned int calc_px(dma_addr_t ptr)
 281 {
 282     return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK;
 283 }
 284
 285 static uint64_t get_rt_sto(uint64_t entry)
 286 {
 287     return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX)
 288                 ? (entry & ZPCI_RTE_ADDR_MASK)
 289                 : 0;
 290 }
 291
 292 static uint64_t get_st_pto(uint64_t entry)
 293 {
 294     return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX)
 295             ? (entry & ZPCI_STE_ADDR_MASK)
 296             : 0;
 297 }
 298
 299 static uint64_t s390_guest_io_table_walk(uint64_t guest_iota,
 300                                   uint64_t guest_dma_address)
 301 {
 302     uint64_t sto_a, pto_a, px_a;
 303     uint64_t sto, pto, pte;
 304     uint32_t rtx, sx, px;
 305
 306     rtx = calc_rtx(guest_dma_address);
 307     sx = calc_sx(guest_dma_address);
 308     px = calc_px(guest_dma_address);
 309
 310     sto_a = guest_iota + rtx * sizeof(uint64_t);
 311     sto = address_space_ldq(&address_space_memory, sto_a,
 312                             MEMTXATTRS_UNSPECIFIED, NULL);
 313     sto = get_rt_sto(sto);
 314     if (!sto) {
 315         pte = 0;
 316         goto out;
 317     }
 318
 319     pto_a = sto + sx * sizeof(uint64_t);
 320     pto = address_space_ldq(&address_space_memory, pto_a,
 321                             MEMTXATTRS_UNSPECIFIED, NULL);
 322     pto = get_st_pto(pto);
 323     if (!pto) {
 324         pte = 0;
 325         goto out;
 326     }
 327
 328     px_a = pto + px * sizeof(uint64_t);
 329     pte = address_space_ldq(&address_space_memory, px_a,
 330                             MEMTXATTRS_UNSPECIFIED, NULL);
 331
 332 out:
 333     return pte;
 334 }
 335
 336 static IOMMUTLBEntry s390_translate_iommu(MemoryRegion *iommu, hwaddr addr,
 337                                           bool is_write)
 338 {
 339     uint64_t pte;
 340     uint32_t flags;
 341     S390PCIBusDevice *pbdev = container_of(iommu, S390PCIBusDevice, iommu_mr);
 342     S390pciState *s;
 343     IOMMUTLBEntry ret = {
 344         .target_as = &address_space_memory,
 345         .iova = 0,
 346         .translated_addr = 0,
 347         .addr_mask = ~(hwaddr)0,
 348         .perm = IOMMU_NONE,
 349     };
 350
 351     switch (pbdev->state) {
 352     case ZPCI_FS_ENABLED:
 353     case ZPCI_FS_BLOCKED:
 354         if (!pbdev->iommu_enabled) {
 355             return ret;
 356         }
 357         break;
 358     default:
 359         return ret;
 360     }
 361
 362     DPRINTF("iommu trans addr 0x%" PRIx64 "\n", addr);
 363
 364     s = S390_PCI_HOST_BRIDGE(pci_device_root_bus(pbdev->pdev)->qbus.parent);
 365     /* s390 does not have an APIC mapped to main storage so we use
 366      * a separate AddressSpace only for msix notifications
 367      */
 368     if (addr == ZPCI_MSI_ADDR) {
 369         ret.target_as = &s->msix_notify_as;
 370         ret.iova = addr;
 371         ret.translated_addr = addr;
 372         ret.addr_mask = 0xfff;
 373         ret.perm = IOMMU_RW;
 374         return ret;
 375     }
 376
 377     if (addr < pbdev->pba || addr > pbdev->pal) {
 378         return ret;
 379     }
 380
 381     pte = s390_guest_io_table_walk(s390_pci_get_table_origin(pbdev->g_iota),
 382                                    addr);
 383     if (!pte) {
 384         return ret;
 385     }
 386
 387     flags = pte & ZPCI_PTE_FLAG_MASK;
 388     ret.iova = addr;
 389     ret.translated_addr = pte & ZPCI_PTE_ADDR_MASK;
 390     ret.addr_mask = 0xfff;
 391
 392     if (flags & ZPCI_PTE_INVALID) {
 393         ret.perm = IOMMU_NONE;
 394     } else {
 395         ret.perm = IOMMU_RW;
 396     }
 397
 398     return ret;
 399 }
 400
 401 static const MemoryRegionIOMMUOps s390_iommu_ops = {
 402     .translate = s390_translate_iommu,
 403 };
 404
 405 static AddressSpace *s390_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn)
 406 {
 407     S390pciState *s = opaque;
 408
 409     return &s->pbdev[PCI_SLOT(devfn)].as;
 410 }
 411
 412 static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set)
 413 {
 414     uint8_t ind_old, ind_new;
 415     hwaddr len = 1;
 416     uint8_t *ind_addr;
 417
 418     ind_addr = cpu_physical_memory_map(ind_loc, &len, 1);
 419     if (!ind_addr) {
 420         s390_pci_generate_error_event(ERR_EVENT_AIRERR, 0, 0, 0, 0);
 421         return -1;
 422     }
 423     do {
 424         ind_old = *ind_addr;
 425         ind_new = ind_old | to_be_set;
 426     } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old);
 427     cpu_physical_memory_unmap(ind_addr, len, 1, len);
 428
 429     return ind_old;
 430 }
 431
 432 static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data,
 433                                 unsigned int size)
 434 {
 435     S390PCIBusDevice *pbdev;
 436     uint32_t io_int_word;
 437     uint32_t fid = data >> ZPCI_MSI_VEC_BITS;
 438     uint32_t vec = data & ZPCI_MSI_VEC_MASK;
 439     uint64_t ind_bit;
 440     uint32_t sum_bit;
 441     uint32_t e = 0;
 442
 443     DPRINTF("write_msix data 0x%" PRIx64 " fid %d vec 0x%x\n", data, fid, vec);
 444
 445     pbdev = s390_pci_find_dev_by_fid(fid);
 446     if (!pbdev) {
 447         e |= (vec << ERR_EVENT_MVN_OFFSET);
 448         s390_pci_generate_error_event(ERR_EVENT_NOMSI, 0, fid, addr, e);
 449         return;
 450     }
 451
 452     if (pbdev->state != ZPCI_FS_ENABLED) {
 453         return;
 454     }
 455
 456     ind_bit = pbdev->routes.adapter.ind_offset;
 457     sum_bit = pbdev->routes.adapter.summary_offset;
 458
 459     set_ind_atomic(pbdev->routes.adapter.ind_addr + (ind_bit + vec) / 8,
 460                    0x80 >> ((ind_bit + vec) % 8));
 461     if (!set_ind_atomic(pbdev->routes.adapter.summary_addr + sum_bit / 8,
 462                                        0x80 >> (sum_bit % 8))) {
 463         io_int_word = (pbdev->isc << 27) | IO_INT_WORD_AI;
 464         s390_io_interrupt(0, 0, 0, io_int_word);
 465     }
 466 }
 467
 468 static uint64_t s390_msi_ctrl_read(void *opaque, hwaddr addr, unsigned size)
 469 {
 470     return 0xffffffff;
 471 }
 472
 473 static const MemoryRegionOps s390_msi_ctrl_ops = {
 474     .write = s390_msi_ctrl_write,
 475     .read = s390_msi_ctrl_read,
 476     .endianness = DEVICE_LITTLE_ENDIAN,
 477 };
 478
 479 void s390_pci_iommu_enable(S390PCIBusDevice *pbdev)
 480 {
 481     memory_region_init_iommu(&pbdev->iommu_mr, OBJECT(&pbdev->mr),
 482                              &s390_iommu_ops, "iommu-s390", pbdev->pal + 1);
 483     memory_region_add_subregion(&pbdev->mr, 0, &pbdev->iommu_mr);
 484     pbdev->iommu_enabled = true;
 485 }
 486
 487 void s390_pci_iommu_disable(S390PCIBusDevice *pbdev)
 488 {
 489     memory_region_del_subregion(&pbdev->mr, &pbdev->iommu_mr);
 490     object_unparent(OBJECT(&pbdev->iommu_mr));
 491     pbdev->iommu_enabled = false;
 492 }
 493
 494 static void s390_pcihost_init_as(S390pciState *s)
 495 {
 496     int i;
 497     S390PCIBusDevice *pbdev;
 498
 499     for (i = 0; i < PCI_SLOT_MAX; i++) {
 500         pbdev = &s->pbdev[i];
 501         memory_region_init(&pbdev->mr, OBJECT(s),
 502                            "iommu-root-s390", UINT64_MAX);
 503         address_space_init(&pbdev->as, &pbdev->mr, "iommu-pci");
 504     }
 505
 506     memory_region_init_io(&s->msix_notify_mr, OBJECT(s),
 507                           &s390_msi_ctrl_ops, s, "msix-s390", UINT64_MAX);
 508     address_space_init(&s->msix_notify_as, &s->msix_notify_mr, "msix-pci");
 509 }
 510
 511 static int s390_pcihost_init(SysBusDevice *dev)
 512 {
 513     PCIBus *b;
 514     BusState *bus;
 515     PCIHostState *phb = PCI_HOST_BRIDGE(dev);
 516     S390pciState *s = S390_PCI_HOST_BRIDGE(dev);
 517
 518     DPRINTF("host_init\n");
 519
 520     b = pci_register_bus(DEVICE(dev), NULL,
 521                          s390_pci_set_irq, s390_pci_map_irq, NULL,
 522                          get_system_memory(), get_system_io(), 0, 64,
 523                          TYPE_PCI_BUS);
 524     s390_pcihost_init_as(s);
 525     pci_setup_iommu(b, s390_pci_dma_iommu, s);
 526
 527     bus = BUS(b);
 528     qbus_set_hotplug_handler(bus, DEVICE(dev), NULL);
 529     phb->bus = b;
 530     QTAILQ_INIT(&s->pending_sei);
 531     return 0;
 532 }
 533
 534 static int s390_pcihost_setup_msix(S390PCIBusDevice *pbdev)
 535 {
 536     uint8_t pos;
 537     uint16_t ctrl;
 538     uint32_t table, pba;
 539
 540     pos = pci_find_capability(pbdev->pdev, PCI_CAP_ID_MSIX);
 541     if (!pos) {
 542         pbdev->msix.available = false;
 543         return 0;
 544     }
 545
 546     ctrl = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_FLAGS,
 547              pci_config_size(pbdev->pdev), sizeof(ctrl));
 548     table = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_TABLE,
 549              pci_config_size(pbdev->pdev), sizeof(table));
 550     pba = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_PBA,
 551              pci_config_size(pbdev->pdev), sizeof(pba));
 552
 553     pbdev->msix.table_bar = table & PCI_MSIX_FLAGS_BIRMASK;
 554     pbdev->msix.table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK;
 555     pbdev->msix.pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK;
 556     pbdev->msix.pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK;
 557     pbdev->msix.entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1;
 558     pbdev->msix.available = true;
 559     return 0;
 560 }
 561
 562 static void s390_pcihost_hot_plug(HotplugHandler *hotplug_dev,
 563                                   DeviceState *dev, Error **errp)
 564 {
 565     PCIDevice *pci_dev = PCI_DEVICE(dev);
 566     S390PCIBusDevice *pbdev;
 567     S390pciState *s = S390_PCI_HOST_BRIDGE(pci_device_root_bus(pci_dev)
 568                                            ->qbus.parent);
 569
 570     pbdev = &s->pbdev[PCI_SLOT(pci_dev->devfn)];
 571
 572     pbdev->fid = s390_pci_get_pfid(pci_dev);
 573     pbdev->pdev = pci_dev;
 574     pbdev->state = ZPCI_FS_DISABLED;
 575     pbdev->fh = s390_pci_get_pfh(pci_dev);
 576
 577     s390_pcihost_setup_msix(pbdev);
 578
 579     if (dev->hotplugged) {
 580         s390_pci_generate_plug_event(HP_EVENT_RESERVED_TO_STANDBY,
 581                                      pbdev->fh, pbdev->fid);
 582         s390_pci_generate_plug_event(HP_EVENT_TO_CONFIGURED,
 583                                      pbdev->fh, pbdev->fid);
 584     }
 585 }
 586
 587 static void s390_pcihost_hot_unplug(HotplugHandler *hotplug_dev,
 588                                     DeviceState *dev, Error **errp)
 589 {
 590     PCIDevice *pci_dev = PCI_DEVICE(dev);
 591     S390pciState *s = S390_PCI_HOST_BRIDGE(pci_device_root_bus(pci_dev)
 592                                            ->qbus.parent);
 593     S390PCIBusDevice *pbdev = &s->pbdev[PCI_SLOT(pci_dev->devfn)];
 594
 595     switch (pbdev->state) {
 596     case ZPCI_FS_RESERVED:
 597         goto out;
 598     case ZPCI_FS_STANDBY:
 599         break;
 600     default:
 601         s390_pci_generate_plug_event(HP_EVENT_CONFIGURED_TO_STBRES,
 602                                      pbdev->fh, pbdev->fid);
 603     }
 604
 605     s390_pci_generate_plug_event(HP_EVENT_STANDBY_TO_RESERVED,
 606                                  pbdev->fh, pbdev->fid);
 607     pbdev->fh = 0;
 608     pbdev->fid = 0;
 609     pbdev->pdev = NULL;
 610     pbdev->state = ZPCI_FS_RESERVED;
 611 out:
 612     object_unparent(OBJECT(pci_dev));
 613 }
 614
 615 static void s390_pcihost_class_init(ObjectClass *klass, void *data)
 616 {
 617     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 618     DeviceClass *dc = DEVICE_CLASS(klass);
 619     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
 620
 621     dc->cannot_instantiate_with_device_add_yet = true;
 622     k->init = s390_pcihost_init;
 623     hc->plug = s390_pcihost_hot_plug;
 624     hc->unplug = s390_pcihost_hot_unplug;
 625     msi_nonbroken = true;
 626 }
 627
 628 static const TypeInfo s390_pcihost_info = {
 629     .name          = TYPE_S390_PCI_HOST_BRIDGE,
 630     .parent        = TYPE_PCI_HOST_BRIDGE,
 631     .instance_size = sizeof(S390pciState),
 632     .class_init    = s390_pcihost_class_init,
 633     .interfaces = (InterfaceInfo[]) {
 634         { TYPE_HOTPLUG_HANDLER },
 635         { }
 636     }
 637 };
 638
 639 static void s390_pci_register_types(void)
 640 {
 641     type_register_static(&s390_pcihost_info);
 642 }
 643
 644 type_init(s390_pci_register_types)