hw/virtio/virtio-pci.c

   1 /*
   2  * Virtio PCI Bindings
   3  *
   4  * Copyright IBM, Corp. 2007
   5  * Copyright (c) 2009 CodeSourcery
   6  *
   7  * Authors:
   8  *  Anthony Liguori   <aliguori@us.ibm.com>
   9  *  Paul Brook        <paul@codesourcery.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2.  See
  12  * the COPYING file in the top-level directory.
  13  *
  14  * Contributions after 2012-01-13 are licensed under the terms of the
  15  * GNU GPL, version 2 or (at your option) any later version.
  16  */
  17
  18 #include "qemu/osdep.h"
  19
  20 #include "standard-headers/linux/virtio_pci.h"
  21 #include "hw/virtio/virtio.h"
  22 #include "hw/virtio/virtio-blk.h"
  23 #include "hw/virtio/virtio-net.h"
  24 #include "hw/virtio/virtio-serial.h"
  25 #include "hw/virtio/virtio-scsi.h"
  26 #include "hw/virtio/virtio-balloon.h"
  27 #include "hw/virtio/virtio-input.h"
  28 #include "hw/pci/pci.h"
  29 #include "qapi/error.h"
  30 #include "qemu/error-report.h"
  31 #include "hw/pci/msi.h"
  32 #include "hw/pci/msix.h"
  33 #include "hw/loader.h"
  34 #include "sysemu/kvm.h"
  35 #include "sysemu/block-backend.h"
  36 #include "virtio-pci.h"
  37 #include "qemu/range.h"
  38 #include "hw/virtio/virtio-bus.h"
  39 #include "qapi/visitor.h"
  40
  41 #define VIRTIO_PCI_REGION_SIZE(dev)     VIRTIO_PCI_CONFIG_OFF(msix_present(dev))
  42
  43 #undef VIRTIO_PCI_CONFIG
  44
  45 /* The remaining space is defined by each driver as the per-driver
  46  * configuration space */
  47 #define VIRTIO_PCI_CONFIG_SIZE(dev)     VIRTIO_PCI_CONFIG_OFF(msix_enabled(dev))
  48
  49 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
  50                                VirtIOPCIProxy *dev);
  51 static void virtio_pci_reset(DeviceState *qdev);
  52
  53 /* virtio device */
  54 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */
  55 static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d)
  56 {
  57     return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
  58 }
  59
  60 /* DeviceState to VirtIOPCIProxy. Note: used on datapath,
  61  * be careful and test performance if you change this.
  62  */
  63 static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d)
  64 {
  65     return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
  66 }
  67
  68 static void virtio_pci_notify(DeviceState *d, uint16_t vector)
  69 {
  70     VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d);
  71
  72     if (msix_enabled(&proxy->pci_dev))
  73         msix_notify(&proxy->pci_dev, vector);
  74     else {
  75         VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
  76         pci_set_irq(&proxy->pci_dev, atomic_read(&vdev->isr) & 1);
  77     }
  78 }
  79
  80 static void virtio_pci_save_config(DeviceState *d, QEMUFile *f)
  81 {
  82     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
  83     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
  84
  85     pci_device_save(&proxy->pci_dev, f);
  86     msix_save(&proxy->pci_dev, f);
  87     if (msix_present(&proxy->pci_dev))
  88         qemu_put_be16(f, vdev->config_vector);
  89 }
  90
  91 static const VMStateDescription vmstate_virtio_pci_modern_queue_state = {
  92     .name = "virtio_pci/modern_queue_state",
  93     .version_id = 1,
  94     .minimum_version_id = 1,
  95     .fields = (VMStateField[]) {
  96         VMSTATE_UINT16(num, VirtIOPCIQueue),
  97         VMSTATE_UNUSED(1), /* enabled was stored as be16 */
  98         VMSTATE_BOOL(enabled, VirtIOPCIQueue),
  99         VMSTATE_UINT32_ARRAY(desc, VirtIOPCIQueue, 2),
 100         VMSTATE_UINT32_ARRAY(avail, VirtIOPCIQueue, 2),
 101         VMSTATE_UINT32_ARRAY(used, VirtIOPCIQueue, 2),
 102         VMSTATE_END_OF_LIST()
 103     }
 104 };
 105
 106 static bool virtio_pci_modern_state_needed(void *opaque)
 107 {
 108     VirtIOPCIProxy *proxy = opaque;
 109
 110     return virtio_pci_modern(proxy);
 111 }
 112
 113 static const VMStateDescription vmstate_virtio_pci_modern_state_sub = {
 114     .name = "virtio_pci/modern_state",
 115     .version_id = 1,
 116     .minimum_version_id = 1,
 117     .needed = &virtio_pci_modern_state_needed,
 118     .fields = (VMStateField[]) {
 119         VMSTATE_UINT32(dfselect, VirtIOPCIProxy),
 120         VMSTATE_UINT32(gfselect, VirtIOPCIProxy),
 121         VMSTATE_UINT32_ARRAY(guest_features, VirtIOPCIProxy, 2),
 122         VMSTATE_STRUCT_ARRAY(vqs, VirtIOPCIProxy, VIRTIO_QUEUE_MAX, 0,
 123                              vmstate_virtio_pci_modern_queue_state,
 124                              VirtIOPCIQueue),
 125         VMSTATE_END_OF_LIST()
 126     }
 127 };
 128
 129 static const VMStateDescription vmstate_virtio_pci = {
 130     .name = "virtio_pci",
 131     .version_id = 1,
 132     .minimum_version_id = 1,
 133     .minimum_version_id_old = 1,
 134     .fields = (VMStateField[]) {
 135         VMSTATE_END_OF_LIST()
 136     },
 137     .subsections = (const VMStateDescription*[]) {
 138         &vmstate_virtio_pci_modern_state_sub,
 139         NULL
 140     }
 141 };
 142
 143 static bool virtio_pci_has_extra_state(DeviceState *d)
 144 {
 145     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 146
 147     return proxy->flags & VIRTIO_PCI_FLAG_MIGRATE_EXTRA;
 148 }
 149
 150 static void virtio_pci_save_extra_state(DeviceState *d, QEMUFile *f)
 151 {
 152     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 153
 154     vmstate_save_state(f, &vmstate_virtio_pci, proxy, NULL);
 155 }
 156
 157 static int virtio_pci_load_extra_state(DeviceState *d, QEMUFile *f)
 158 {
 159     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 160
 161     return vmstate_load_state(f, &vmstate_virtio_pci, proxy, 1);
 162 }
 163
 164 static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f)
 165 {
 166     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 167     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 168
 169     if (msix_present(&proxy->pci_dev))
 170         qemu_put_be16(f, virtio_queue_vector(vdev, n));
 171 }
 172
 173 static int virtio_pci_load_config(DeviceState *d, QEMUFile *f)
 174 {
 175     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 176     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 177
 178     int ret;
 179     ret = pci_device_load(&proxy->pci_dev, f);
 180     if (ret) {
 181         return ret;
 182     }
 183     msix_unuse_all_vectors(&proxy->pci_dev);
 184     msix_load(&proxy->pci_dev, f);
 185     if (msix_present(&proxy->pci_dev)) {
 186         qemu_get_be16s(f, &vdev->config_vector);
 187     } else {
 188         vdev->config_vector = VIRTIO_NO_VECTOR;
 189     }
 190     if (vdev->config_vector != VIRTIO_NO_VECTOR) {
 191         return msix_vector_use(&proxy->pci_dev, vdev->config_vector);
 192     }
 193     return 0;
 194 }
 195
 196 static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f)
 197 {
 198     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 199     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 200
 201     uint16_t vector;
 202     if (msix_present(&proxy->pci_dev)) {
 203         qemu_get_be16s(f, &vector);
 204     } else {
 205         vector = VIRTIO_NO_VECTOR;
 206     }
 207     virtio_queue_set_vector(vdev, n, vector);
 208     if (vector != VIRTIO_NO_VECTOR) {
 209         return msix_vector_use(&proxy->pci_dev, vector);
 210     }
 211
 212     return 0;
 213 }
 214
 215 static bool virtio_pci_ioeventfd_enabled(DeviceState *d)
 216 {
 217     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 218
 219     return (proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) != 0;
 220 }
 221
 222 #define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000
 223
 224 static inline int virtio_pci_queue_mem_mult(struct VirtIOPCIProxy *proxy)
 225 {
 226     return (proxy->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ) ?
 227         QEMU_VIRTIO_PCI_QUEUE_MEM_MULT : 4;
 228 }
 229
 230 static int virtio_pci_ioeventfd_assign(DeviceState *d, EventNotifier *notifier,
 231                                        int n, bool assign)
 232 {
 233     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 234     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 235     VirtQueue *vq = virtio_get_queue(vdev, n);
 236     bool legacy = virtio_pci_legacy(proxy);
 237     bool modern = virtio_pci_modern(proxy);
 238     bool fast_mmio = kvm_ioeventfd_any_length_enabled();
 239     bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
 240     MemoryRegion *modern_mr = &proxy->notify.mr;
 241     MemoryRegion *modern_notify_mr = &proxy->notify_pio.mr;
 242     MemoryRegion *legacy_mr = &proxy->bar;
 243     hwaddr modern_addr = virtio_pci_queue_mem_mult(proxy) *
 244                          virtio_get_queue_index(vq);
 245     hwaddr legacy_addr = VIRTIO_PCI_QUEUE_NOTIFY;
 246
 247     if (assign) {
 248         if (modern) {
 249             if (fast_mmio) {
 250                 memory_region_add_eventfd(modern_mr, modern_addr, 0,
 251                                           false, n, notifier);
 252             } else {
 253                 memory_region_add_eventfd(modern_mr, modern_addr, 2,
 254                                           false, n, notifier);
 255             }
 256             if (modern_pio) {
 257                 memory_region_add_eventfd(modern_notify_mr, 0, 2,
 258                                               true, n, notifier);
 259             }
 260         }
 261         if (legacy) {
 262             memory_region_add_eventfd(legacy_mr, legacy_addr, 2,
 263                                       true, n, notifier);
 264         }
 265     } else {
 266         if (modern) {
 267             if (fast_mmio) {
 268                 memory_region_del_eventfd(modern_mr, modern_addr, 0,
 269                                           false, n, notifier);
 270             } else {
 271                 memory_region_del_eventfd(modern_mr, modern_addr, 2,
 272                                           false, n, notifier);
 273             }
 274             if (modern_pio) {
 275                 memory_region_del_eventfd(modern_notify_mr, 0, 2,
 276                                           true, n, notifier);
 277             }
 278         }
 279         if (legacy) {
 280             memory_region_del_eventfd(legacy_mr, legacy_addr, 2,
 281                                       true, n, notifier);
 282         }
 283     }
 284     return 0;
 285 }
 286
 287 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
 288 {
 289     virtio_bus_start_ioeventfd(&proxy->bus);
 290 }
 291
 292 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
 293 {
 294     virtio_bus_stop_ioeventfd(&proxy->bus);
 295 }
 296
 297 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 298 {
 299     VirtIOPCIProxy *proxy = opaque;
 300     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 301     hwaddr pa;
 302
 303     switch (addr) {
 304     case VIRTIO_PCI_GUEST_FEATURES:
 305         /* Guest does not negotiate properly?  We have to assume nothing. */
 306         if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
 307             val = virtio_bus_get_vdev_bad_features(&proxy->bus);
 308         }
 309         virtio_set_features(vdev, val);
 310         break;
 311     case VIRTIO_PCI_QUEUE_PFN:
 312         pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 313         if (pa == 0) {
 314             virtio_pci_reset(DEVICE(proxy));
 315         }
 316         else
 317             virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
 318         break;
 319     case VIRTIO_PCI_QUEUE_SEL:
 320         if (val < VIRTIO_QUEUE_MAX)
 321             vdev->queue_sel = val;
 322         break;
 323     case VIRTIO_PCI_QUEUE_NOTIFY:
 324         if (val < VIRTIO_QUEUE_MAX) {
 325             virtio_queue_notify(vdev, val);
 326         }
 327         break;
 328     case VIRTIO_PCI_STATUS:
 329         if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
 330             virtio_pci_stop_ioeventfd(proxy);
 331         }
 332
 333         virtio_set_status(vdev, val & 0xFF);
 334
 335         if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
 336             virtio_pci_start_ioeventfd(proxy);
 337         }
 338
 339         if (vdev->status == 0) {
 340             virtio_pci_reset(DEVICE(proxy));
 341         }
 342
 343         /* Linux before 2.6.34 drives the device without enabling
 344            the PCI device bus master bit. Enable it automatically
 345            for the guest. This is a PCI spec violation but so is
 346            initiating DMA with bus master bit clear. */
 347         if (val == (VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER)) {
 348             pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
 349                                      proxy->pci_dev.config[PCI_COMMAND] |
 350                                      PCI_COMMAND_MASTER, 1);
 351         }
 352         break;
 353     case VIRTIO_MSI_CONFIG_VECTOR:
 354         msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
 355         /* Make it possible for guest to discover an error took place. */
 356         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 357             val = VIRTIO_NO_VECTOR;
 358         vdev->config_vector = val;
 359         break;
 360     case VIRTIO_MSI_QUEUE_VECTOR:
 361         msix_vector_unuse(&proxy->pci_dev,
 362                           virtio_queue_vector(vdev, vdev->queue_sel));
 363         /* Make it possible for guest to discover an error took place. */
 364         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 365             val = VIRTIO_NO_VECTOR;
 366         virtio_queue_set_vector(vdev, vdev->queue_sel, val);
 367         break;
 368     default:
 369         error_report("%s: unexpected address 0x%x value 0x%x",
 370                      __func__, addr, val);
 371         break;
 372     }
 373 }
 374
 375 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
 376 {
 377     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 378     uint32_t ret = 0xFFFFFFFF;
 379
 380     switch (addr) {
 381     case VIRTIO_PCI_HOST_FEATURES:
 382         ret = vdev->host_features;
 383         break;
 384     case VIRTIO_PCI_GUEST_FEATURES:
 385         ret = vdev->guest_features;
 386         break;
 387     case VIRTIO_PCI_QUEUE_PFN:
 388         ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
 389               >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 390         break;
 391     case VIRTIO_PCI_QUEUE_NUM:
 392         ret = virtio_queue_get_num(vdev, vdev->queue_sel);
 393         break;
 394     case VIRTIO_PCI_QUEUE_SEL:
 395         ret = vdev->queue_sel;
 396         break;
 397     case VIRTIO_PCI_STATUS:
 398         ret = vdev->status;
 399         break;
 400     case VIRTIO_PCI_ISR:
 401         /* reading from the ISR also clears it. */
 402         ret = atomic_xchg(&vdev->isr, 0);
 403         pci_irq_deassert(&proxy->pci_dev);
 404         break;
 405     case VIRTIO_MSI_CONFIG_VECTOR:
 406         ret = vdev->config_vector;
 407         break;
 408     case VIRTIO_MSI_QUEUE_VECTOR:
 409         ret = virtio_queue_vector(vdev, vdev->queue_sel);
 410         break;
 411     default:
 412         break;
 413     }
 414
 415     return ret;
 416 }
 417
 418 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr,
 419                                        unsigned size)
 420 {
 421     VirtIOPCIProxy *proxy = opaque;
 422     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 423     uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev);
 424     uint64_t val = 0;
 425     if (addr < config) {
 426         return virtio_ioport_read(proxy, addr);
 427     }
 428     addr -= config;
 429
 430     switch (size) {
 431     case 1:
 432         val = virtio_config_readb(vdev, addr);
 433         break;
 434     case 2:
 435         val = virtio_config_readw(vdev, addr);
 436         if (virtio_is_big_endian(vdev)) {
 437             val = bswap16(val);
 438         }
 439         break;
 440     case 4:
 441         val = virtio_config_readl(vdev, addr);
 442         if (virtio_is_big_endian(vdev)) {
 443             val = bswap32(val);
 444         }
 445         break;
 446     }
 447     return val;
 448 }
 449
 450 static void virtio_pci_config_write(void *opaque, hwaddr addr,
 451                                     uint64_t val, unsigned size)
 452 {
 453     VirtIOPCIProxy *proxy = opaque;
 454     uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev);
 455     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 456     if (addr < config) {
 457         virtio_ioport_write(proxy, addr, val);
 458         return;
 459     }
 460     addr -= config;
 461     /*
 462      * Virtio-PCI is odd. Ioports are LE but config space is target native
 463      * endian.
 464      */
 465     switch (size) {
 466     case 1:
 467         virtio_config_writeb(vdev, addr, val);
 468         break;
 469     case 2:
 470         if (virtio_is_big_endian(vdev)) {
 471             val = bswap16(val);
 472         }
 473         virtio_config_writew(vdev, addr, val);
 474         break;
 475     case 4:
 476         if (virtio_is_big_endian(vdev)) {
 477             val = bswap32(val);
 478         }
 479         virtio_config_writel(vdev, addr, val);
 480         break;
 481     }
 482 }
 483
 484 static const MemoryRegionOps virtio_pci_config_ops = {
 485     .read = virtio_pci_config_read,
 486     .write = virtio_pci_config_write,
 487     .impl = {
 488         .min_access_size = 1,
 489         .max_access_size = 4,
 490     },
 491     .endianness = DEVICE_LITTLE_ENDIAN,
 492 };
 493
 494 static MemoryRegion *virtio_address_space_lookup(VirtIOPCIProxy *proxy,
 495                                                  hwaddr *off, int len)
 496 {
 497     int i;
 498     VirtIOPCIRegion *reg;
 499
 500     for (i = 0; i < ARRAY_SIZE(proxy->regs); ++i) {
 501         reg = &proxy->regs[i];
 502         if (*off >= reg->offset &&
 503             *off + len <= reg->offset + reg->size) {
 504             *off -= reg->offset;
 505             return &reg->mr;
 506         }
 507     }
 508
 509     return NULL;
 510 }
 511
 512 /* Below are generic functions to do memcpy from/to an address space,
 513  * without byteswaps, with input validation.
 514  *
 515  * As regular address_space_* APIs all do some kind of byteswap at least for
 516  * some host/target combinations, we are forced to explicitly convert to a
 517  * known-endianness integer value.
 518  * It doesn't really matter which endian format to go through, so the code
 519  * below selects the endian that causes the least amount of work on the given
 520  * host.
 521  *
 522  * Note: host pointer must be aligned.
 523  */
 524 static
 525 void virtio_address_space_write(VirtIOPCIProxy *proxy, hwaddr addr,
 526                                 const uint8_t *buf, int len)
 527 {
 528     uint64_t val;
 529     MemoryRegion *mr;
 530
 531     /* address_space_* APIs assume an aligned address.
 532      * As address is under guest control, handle illegal values.
 533      */
 534     addr &= ~(len - 1);
 535
 536     mr = virtio_address_space_lookup(proxy, &addr, len);
 537     if (!mr) {
 538         return;
 539     }
 540
 541     /* Make sure caller aligned buf properly */
 542     assert(!(((uintptr_t)buf) & (len - 1)));
 543
 544     switch (len) {
 545     case 1:
 546         val = pci_get_byte(buf);
 547         break;
 548     case 2:
 549         val = cpu_to_le16(pci_get_word(buf));
 550         break;
 551     case 4:
 552         val = cpu_to_le32(pci_get_long(buf));
 553         break;
 554     default:
 555         /* As length is under guest control, handle illegal values. */
 556         return;
 557     }
 558     memory_region_dispatch_write(mr, addr, val, len, MEMTXATTRS_UNSPECIFIED);
 559 }
 560
 561 static void
 562 virtio_address_space_read(VirtIOPCIProxy *proxy, hwaddr addr,
 563                           uint8_t *buf, int len)
 564 {
 565     uint64_t val;
 566     MemoryRegion *mr;
 567
 568     /* address_space_* APIs assume an aligned address.
 569      * As address is under guest control, handle illegal values.
 570      */
 571     addr &= ~(len - 1);
 572
 573     mr = virtio_address_space_lookup(proxy, &addr, len);
 574     if (!mr) {
 575         return;
 576     }
 577
 578     /* Make sure caller aligned buf properly */
 579     assert(!(((uintptr_t)buf) & (len - 1)));
 580
 581     memory_region_dispatch_read(mr, addr, &val, len, MEMTXATTRS_UNSPECIFIED);
 582     switch (len) {
 583     case 1:
 584         pci_set_byte(buf, val);
 585         break;
 586     case 2:
 587         pci_set_word(buf, le16_to_cpu(val));
 588         break;
 589     case 4:
 590         pci_set_long(buf, le32_to_cpu(val));
 591         break;
 592     default:
 593         /* As length is under guest control, handle illegal values. */
 594         break;
 595     }
 596 }
 597
 598 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
 599                                 uint32_t val, int len)
 600 {
 601     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 602     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 603     struct virtio_pci_cfg_cap *cfg;
 604
 605     pci_default_write_config(pci_dev, address, val, len);
 606
 607     if (range_covers_byte(address, len, PCI_COMMAND) &&
 608         !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 609         virtio_pci_stop_ioeventfd(proxy);
 610         virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
 611     }
 612
 613     if (proxy->config_cap &&
 614         ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap,
 615                                                                   pci_cfg_data),
 616                        sizeof cfg->pci_cfg_data)) {
 617         uint32_t off;
 618         uint32_t len;
 619
 620         cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
 621         off = le32_to_cpu(cfg->cap.offset);
 622         len = le32_to_cpu(cfg->cap.length);
 623
 624         if (len == 1 || len == 2 || len == 4) {
 625             assert(len <= sizeof cfg->pci_cfg_data);
 626             virtio_address_space_write(proxy, off, cfg->pci_cfg_data, len);
 627         }
 628     }
 629 }
 630
 631 static uint32_t virtio_read_config(PCIDevice *pci_dev,
 632                                    uint32_t address, int len)
 633 {
 634     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 635     struct virtio_pci_cfg_cap *cfg;
 636
 637     if (proxy->config_cap &&
 638         ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap,
 639                                                                   pci_cfg_data),
 640                        sizeof cfg->pci_cfg_data)) {
 641         uint32_t off;
 642         uint32_t len;
 643
 644         cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
 645         off = le32_to_cpu(cfg->cap.offset);
 646         len = le32_to_cpu(cfg->cap.length);
 647
 648         if (len == 1 || len == 2 || len == 4) {
 649             assert(len <= sizeof cfg->pci_cfg_data);
 650             virtio_address_space_read(proxy, off, cfg->pci_cfg_data, len);
 651         }
 652     }
 653
 654     return pci_default_read_config(pci_dev, address, len);
 655 }
 656
 657 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
 658                                         unsigned int queue_no,
 659                                         unsigned int vector)
 660 {
 661     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 662     int ret;
 663
 664     if (irqfd->users == 0) {
 665         ret = kvm_irqchip_add_msi_route(kvm_state, vector, &proxy->pci_dev);
 666         if (ret < 0) {
 667             return ret;
 668         }
 669         irqfd->virq = ret;
 670     }
 671     irqfd->users++;
 672     return 0;
 673 }
 674
 675 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy,
 676                                              unsigned int vector)
 677 {
 678     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 679     if (--irqfd->users == 0) {
 680         kvm_irqchip_release_virq(kvm_state, irqfd->virq);
 681     }
 682 }
 683
 684 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy,
 685                                  unsigned int queue_no,
 686                                  unsigned int vector)
 687 {
 688     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 689     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 690     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 691     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 692     return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, NULL, irqfd->virq);
 693 }
 694
 695 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
 696                                       unsigned int queue_no,
 697                                       unsigned int vector)
 698 {
 699     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 700     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 701     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 702     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 703     int ret;
 704
 705     ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, n, irqfd->virq);
 706     assert(ret == 0);
 707 }
 708
 709 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
 710 {
 711     PCIDevice *dev = &proxy->pci_dev;
 712     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 713     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 714     unsigned int vector;
 715     int ret, queue_no;
 716
 717     for (queue_no = 0; queue_no < nvqs; queue_no++) {
 718         if (!virtio_queue_get_num(vdev, queue_no)) {
 719             break;
 720         }
 721         vector = virtio_queue_vector(vdev, queue_no);
 722         if (vector >= msix_nr_vectors_allocated(dev)) {
 723             continue;
 724         }
 725         ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector);
 726         if (ret < 0) {
 727             goto undo;
 728         }
 729         /* If guest supports masking, set up irqfd now.
 730          * Otherwise, delay until unmasked in the frontend.
 731          */
 732         if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
 733             ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
 734             if (ret < 0) {
 735                 kvm_virtio_pci_vq_vector_release(proxy, vector);
 736                 goto undo;
 737             }
 738         }
 739     }
 740     return 0;
 741
 742 undo:
 743     while (--queue_no >= 0) {
 744         vector = virtio_queue_vector(vdev, queue_no);
 745         if (vector >= msix_nr_vectors_allocated(dev)) {
 746             continue;
 747         }
 748         if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
 749             kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 750         }
 751         kvm_virtio_pci_vq_vector_release(proxy, vector);
 752     }
 753     return ret;
 754 }
 755
 756 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
 757 {
 758     PCIDevice *dev = &proxy->pci_dev;
 759     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 760     unsigned int vector;
 761     int queue_no;
 762     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 763
 764     for (queue_no = 0; queue_no < nvqs; queue_no++) {
 765         if (!virtio_queue_get_num(vdev, queue_no)) {
 766             break;
 767         }
 768         vector = virtio_queue_vector(vdev, queue_no);
 769         if (vector >= msix_nr_vectors_allocated(dev)) {
 770             continue;
 771         }
 772         /* If guest supports masking, clean up irqfd now.
 773          * Otherwise, it was cleaned when masked in the frontend.
 774          */
 775         if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
 776             kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 777         }
 778         kvm_virtio_pci_vq_vector_release(proxy, vector);
 779     }
 780 }
 781
 782 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
 783                                        unsigned int queue_no,
 784                                        unsigned int vector,
 785                                        MSIMessage msg)
 786 {
 787     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 788     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 789     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 790     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 791     VirtIOIRQFD *irqfd;
 792     int ret = 0;
 793
 794     if (proxy->vector_irqfd) {
 795         irqfd = &proxy->vector_irqfd[vector];
 796         if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) {
 797             ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg,
 798                                                &proxy->pci_dev);
 799             if (ret < 0) {
 800                 return ret;
 801             }
 802             kvm_irqchip_commit_routes(kvm_state);
 803         }
 804     }
 805
 806     /* If guest supports masking, irqfd is already setup, unmask it.
 807      * Otherwise, set it up now.
 808      */
 809     if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
 810         k->guest_notifier_mask(vdev, queue_no, false);
 811         /* Test after unmasking to avoid losing events. */
 812         if (k->guest_notifier_pending &&
 813             k->guest_notifier_pending(vdev, queue_no)) {
 814             event_notifier_set(n);
 815         }
 816     } else {
 817         ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
 818     }
 819     return ret;
 820 }
 821
 822 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy,
 823                                              unsigned int queue_no,
 824                                              unsigned int vector)
 825 {
 826     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 827     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 828
 829     /* If guest supports masking, keep irqfd but mask it.
 830      * Otherwise, clean it up now.
 831      */
 832     if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
 833         k->guest_notifier_mask(vdev, queue_no, true);
 834     } else {
 835         kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 836     }
 837 }
 838
 839 static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
 840                                     MSIMessage msg)
 841 {
 842     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 843     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 844     VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
 845     int ret, index, unmasked = 0;
 846
 847     while (vq) {
 848         index = virtio_get_queue_index(vq);
 849         if (!virtio_queue_get_num(vdev, index)) {
 850             break;
 851         }
 852         if (index < proxy->nvqs_with_notifiers) {
 853             ret = virtio_pci_vq_vector_unmask(proxy, index, vector, msg);
 854             if (ret < 0) {
 855                 goto undo;
 856             }
 857             ++unmasked;
 858         }
 859         vq = virtio_vector_next_queue(vq);
 860     }
 861
 862     return 0;
 863
 864 undo:
 865     vq = virtio_vector_first_queue(vdev, vector);
 866     while (vq && unmasked >= 0) {
 867         index = virtio_get_queue_index(vq);
 868         if (index < proxy->nvqs_with_notifiers) {
 869             virtio_pci_vq_vector_mask(proxy, index, vector);
 870             --unmasked;
 871         }
 872         vq = virtio_vector_next_queue(vq);
 873     }
 874     return ret;
 875 }
 876
 877 static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
 878 {
 879     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 880     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 881     VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
 882     int index;
 883
 884     while (vq) {
 885         index = virtio_get_queue_index(vq);
 886         if (!virtio_queue_get_num(vdev, index)) {
 887             break;
 888         }
 889         if (index < proxy->nvqs_with_notifiers) {
 890             virtio_pci_vq_vector_mask(proxy, index, vector);
 891         }
 892         vq = virtio_vector_next_queue(vq);
 893     }
 894 }
 895
 896 static void virtio_pci_vector_poll(PCIDevice *dev,
 897                                    unsigned int vector_start,
 898                                    unsigned int vector_end)
 899 {
 900     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 901     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 902     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 903     int queue_no;
 904     unsigned int vector;
 905     EventNotifier *notifier;
 906     VirtQueue *vq;
 907
 908     for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
 909         if (!virtio_queue_get_num(vdev, queue_no)) {
 910             break;
 911         }
 912         vector = virtio_queue_vector(vdev, queue_no);
 913         if (vector < vector_start || vector >= vector_end ||
 914             !msix_is_masked(dev, vector)) {
 915             continue;
 916         }
 917         vq = virtio_get_queue(vdev, queue_no);
 918         notifier = virtio_queue_get_guest_notifier(vq);
 919         if (k->guest_notifier_pending) {
 920             if (k->guest_notifier_pending(vdev, queue_no)) {
 921                 msix_set_pending(dev, vector);
 922             }
 923         } else if (event_notifier_test_and_clear(notifier)) {
 924             msix_set_pending(dev, vector);
 925         }
 926     }
 927 }
 928
 929 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
 930                                          bool with_irqfd)
 931 {
 932     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 933     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 934     VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
 935     VirtQueue *vq = virtio_get_queue(vdev, n);
 936     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 937
 938     if (assign) {
 939         int r = event_notifier_init(notifier, 0);
 940         if (r < 0) {
 941             return r;
 942         }
 943         virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
 944     } else {
 945         virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
 946         event_notifier_cleanup(notifier);
 947     }
 948
 949     if (!msix_enabled(&proxy->pci_dev) &&
 950         vdev->use_guest_notifier_mask &&
 951         vdc->guest_notifier_mask) {
 952         vdc->guest_notifier_mask(vdev, n, !assign);
 953     }
 954
 955     return 0;
 956 }
 957
 958 static bool virtio_pci_query_guest_notifiers(DeviceState *d)
 959 {
 960     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 961     return msix_enabled(&proxy->pci_dev);
 962 }
 963
 964 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
 965 {
 966     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 967     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 968     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 969     int r, n;
 970     bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
 971         kvm_msi_via_irqfd_enabled();
 972
 973     nvqs = MIN(nvqs, VIRTIO_QUEUE_MAX);
 974
 975     /* When deassigning, pass a consistent nvqs value
 976      * to avoid leaking notifiers.
 977      */
 978     assert(assign || nvqs == proxy->nvqs_with_notifiers);
 979
 980     proxy->nvqs_with_notifiers = nvqs;
 981
 982     /* Must unset vector notifier while guest notifier is still assigned */
 983     if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) {
 984         msix_unset_vector_notifiers(&proxy->pci_dev);
 985         if (proxy->vector_irqfd) {
 986             kvm_virtio_pci_vector_release(proxy, nvqs);
 987             g_free(proxy->vector_irqfd);
 988             proxy->vector_irqfd = NULL;
 989         }
 990     }
 991
 992     for (n = 0; n < nvqs; n++) {
 993         if (!virtio_queue_get_num(vdev, n)) {
 994             break;
 995         }
 996
 997         r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd);
 998         if (r < 0) {
 999             goto assign_error;
1000         }
1001     }
1002
1003     /* Must set vector notifier after guest notifier has been assigned */
1004     if ((with_irqfd || k->guest_notifier_mask) && assign) {
1005         if (with_irqfd) {
1006             proxy->vector_irqfd =
1007                 g_malloc0(sizeof(*proxy->vector_irqfd) *
1008                           msix_nr_vectors_allocated(&proxy->pci_dev));
1009             r = kvm_virtio_pci_vector_use(proxy, nvqs);
1010             if (r < 0) {
1011                 goto assign_error;
1012             }
1013         }
1014         r = msix_set_vector_notifiers(&proxy->pci_dev,
1015                                       virtio_pci_vector_unmask,
1016                                       virtio_pci_vector_mask,
1017                                       virtio_pci_vector_poll);
1018         if (r < 0) {
1019             goto notifiers_error;
1020         }
1021     }
1022
1023     return 0;
1024
1025 notifiers_error:
1026     if (with_irqfd) {
1027         assert(assign);
1028         kvm_virtio_pci_vector_release(proxy, nvqs);
1029     }
1030
1031 assign_error:
1032     /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
1033     assert(assign);
1034     while (--n >= 0) {
1035         virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd);
1036     }
1037     return r;
1038 }
1039
1040 static int virtio_pci_set_host_notifier_mr(DeviceState *d, int n,
1041                                            MemoryRegion *mr, bool assign)
1042 {
1043     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
1044     int offset;
1045
1046     if (n >= VIRTIO_QUEUE_MAX || !virtio_pci_modern(proxy) ||
1047         virtio_pci_queue_mem_mult(proxy) != memory_region_size(mr)) {
1048         return -1;
1049     }
1050
1051     if (assign) {
1052         offset = virtio_pci_queue_mem_mult(proxy) * n;
1053         memory_region_add_subregion_overlap(&proxy->notify.mr, offset, mr, 1);
1054     } else {
1055         memory_region_del_subregion(&proxy->notify.mr, mr);
1056     }
1057
1058     return 0;
1059 }
1060
1061 static void virtio_pci_vmstate_change(DeviceState *d, bool running)
1062 {
1063     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
1064     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1065
1066     if (running) {
1067         /* Old QEMU versions did not set bus master enable on status write.
1068          * Detect DRIVER set and enable it.
1069          */
1070         if ((proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION) &&
1071             (vdev->status & VIRTIO_CONFIG_S_DRIVER) &&
1072             !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
1073             pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
1074                                      proxy->pci_dev.config[PCI_COMMAND] |
1075                                      PCI_COMMAND_MASTER, 1);
1076         }
1077         virtio_pci_start_ioeventfd(proxy);
1078     } else {
1079         virtio_pci_stop_ioeventfd(proxy);
1080     }
1081 }
1082
1083 #ifdef CONFIG_VIRTFS
1084 static void virtio_9p_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
1085 {
1086     V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev);
1087     DeviceState *vdev = DEVICE(&dev->vdev);
1088
1089     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1090     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
1091 }
1092
1093 static Property virtio_9p_pci_properties[] = {
1094     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1095                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1096     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1097     DEFINE_PROP_END_OF_LIST(),
1098 };
1099
1100 static void virtio_9p_pci_class_init(ObjectClass *klass, void *data)
1101 {
1102     DeviceClass *dc = DEVICE_CLASS(klass);
1103     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1104     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1105
1106     k->realize = virtio_9p_pci_realize;
1107     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1108     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P;
1109     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1110     pcidev_k->class_id = 0x2;
1111     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1112     dc->props = virtio_9p_pci_properties;
1113 }
1114
1115 static void virtio_9p_pci_instance_init(Object *obj)
1116 {
1117     V9fsPCIState *dev = VIRTIO_9P_PCI(obj);
1118
1119     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1120                                 TYPE_VIRTIO_9P);
1121 }
1122
1123 static const TypeInfo virtio_9p_pci_info = {
1124     .name          = TYPE_VIRTIO_9P_PCI,
1125     .parent        = TYPE_VIRTIO_PCI,
1126     .instance_size = sizeof(V9fsPCIState),
1127     .instance_init = virtio_9p_pci_instance_init,
1128     .class_init    = virtio_9p_pci_class_init,
1129 };
1130 #endif /* CONFIG_VIRTFS */
1131
1132 /*
1133  * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
1134  */
1135
1136 static int virtio_pci_query_nvectors(DeviceState *d)
1137 {
1138     VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1139
1140     return proxy->nvectors;
1141 }
1142
1143 static AddressSpace *virtio_pci_get_dma_as(DeviceState *d)
1144 {
1145     VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1146     PCIDevice *dev = &proxy->pci_dev;
1147
1148     return pci_get_address_space(dev);
1149 }
1150
1151 static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy,
1152                                    struct virtio_pci_cap *cap)
1153 {
1154     PCIDevice *dev = &proxy->pci_dev;
1155     int offset;
1156
1157     offset = pci_add_capability(dev, PCI_CAP_ID_VNDR, 0,
1158                                 cap->cap_len, &error_abort);
1159
1160     assert(cap->cap_len >= sizeof *cap);
1161     memcpy(dev->config + offset + PCI_CAP_FLAGS, &cap->cap_len,
1162            cap->cap_len - PCI_CAP_FLAGS);
1163
1164     return offset;
1165 }
1166
1167 static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr,
1168                                        unsigned size)
1169 {
1170     VirtIOPCIProxy *proxy = opaque;
1171     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1172     uint32_t val = 0;
1173     int i;
1174
1175     switch (addr) {
1176     case VIRTIO_PCI_COMMON_DFSELECT:
1177         val = proxy->dfselect;
1178         break;
1179     case VIRTIO_PCI_COMMON_DF:
1180         if (proxy->dfselect <= 1) {
1181             VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
1182
1183             val = (vdev->host_features & ~vdc->legacy_features) >>
1184                 (32 * proxy->dfselect);
1185         }
1186         break;
1187     case VIRTIO_PCI_COMMON_GFSELECT:
1188         val = proxy->gfselect;
1189         break;
1190     case VIRTIO_PCI_COMMON_GF:
1191         if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
1192             val = proxy->guest_features[proxy->gfselect];
1193         }
1194         break;
1195     case VIRTIO_PCI_COMMON_MSIX:
1196         val = vdev->config_vector;
1197         break;
1198     case VIRTIO_PCI_COMMON_NUMQ:
1199         for (i = 0; i < VIRTIO_QUEUE_MAX; ++i) {
1200             if (virtio_queue_get_num(vdev, i)) {
1201                 val = i + 1;
1202             }
1203         }
1204         break;
1205     case VIRTIO_PCI_COMMON_STATUS:
1206         val = vdev->status;
1207         break;
1208     case VIRTIO_PCI_COMMON_CFGGENERATION:
1209         val = vdev->generation;
1210         break;
1211     case VIRTIO_PCI_COMMON_Q_SELECT:
1212         val = vdev->queue_sel;
1213         break;
1214     case VIRTIO_PCI_COMMON_Q_SIZE:
1215         val = virtio_queue_get_num(vdev, vdev->queue_sel);
1216         break;
1217     case VIRTIO_PCI_COMMON_Q_MSIX:
1218         val = virtio_queue_vector(vdev, vdev->queue_sel);
1219         break;
1220     case VIRTIO_PCI_COMMON_Q_ENABLE:
1221         val = proxy->vqs[vdev->queue_sel].enabled;
1222         break;
1223     case VIRTIO_PCI_COMMON_Q_NOFF:
1224         /* Simply map queues in order */
1225         val = vdev->queue_sel;
1226         break;
1227     case VIRTIO_PCI_COMMON_Q_DESCLO:
1228         val = proxy->vqs[vdev->queue_sel].desc[0];
1229         break;
1230     case VIRTIO_PCI_COMMON_Q_DESCHI:
1231         val = proxy->vqs[vdev->queue_sel].desc[1];
1232         break;
1233     case VIRTIO_PCI_COMMON_Q_AVAILLO:
1234         val = proxy->vqs[vdev->queue_sel].avail[0];
1235         break;
1236     case VIRTIO_PCI_COMMON_Q_AVAILHI:
1237         val = proxy->vqs[vdev->queue_sel].avail[1];
1238         break;
1239     case VIRTIO_PCI_COMMON_Q_USEDLO:
1240         val = proxy->vqs[vdev->queue_sel].used[0];
1241         break;
1242     case VIRTIO_PCI_COMMON_Q_USEDHI:
1243         val = proxy->vqs[vdev->queue_sel].used[1];
1244         break;
1245     default:
1246         val = 0;
1247     }
1248
1249     return val;
1250 }
1251
1252 static void virtio_pci_common_write(void *opaque, hwaddr addr,
1253                                     uint64_t val, unsigned size)
1254 {
1255     VirtIOPCIProxy *proxy = opaque;
1256     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1257
1258     switch (addr) {
1259     case VIRTIO_PCI_COMMON_DFSELECT:
1260         proxy->dfselect = val;
1261         break;
1262     case VIRTIO_PCI_COMMON_GFSELECT:
1263         proxy->gfselect = val;
1264         break;
1265     case VIRTIO_PCI_COMMON_GF:
1266         if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
1267             proxy->guest_features[proxy->gfselect] = val;
1268             virtio_set_features(vdev,
1269                                 (((uint64_t)proxy->guest_features[1]) << 32) |
1270                                 proxy->guest_features[0]);
1271         }
1272         break;
1273     case VIRTIO_PCI_COMMON_MSIX:
1274         msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
1275         /* Make it possible for guest to discover an error took place. */
1276         if (msix_vector_use(&proxy->pci_dev, val) < 0) {
1277             val = VIRTIO_NO_VECTOR;
1278         }
1279         vdev->config_vector = val;
1280         break;
1281     case VIRTIO_PCI_COMMON_STATUS:
1282         if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
1283             virtio_pci_stop_ioeventfd(proxy);
1284         }
1285
1286         virtio_set_status(vdev, val & 0xFF);
1287
1288         if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
1289             virtio_pci_start_ioeventfd(proxy);
1290         }
1291
1292         if (vdev->status == 0) {
1293             virtio_pci_reset(DEVICE(proxy));
1294         }
1295
1296         break;
1297     case VIRTIO_PCI_COMMON_Q_SELECT:
1298         if (val < VIRTIO_QUEUE_MAX) {
1299             vdev->queue_sel = val;
1300         }
1301         break;
1302     case VIRTIO_PCI_COMMON_Q_SIZE:
1303         proxy->vqs[vdev->queue_sel].num = val;
1304         break;
1305     case VIRTIO_PCI_COMMON_Q_MSIX:
1306         msix_vector_unuse(&proxy->pci_dev,
1307                           virtio_queue_vector(vdev, vdev->queue_sel));
1308         /* Make it possible for guest to discover an error took place. */
1309         if (msix_vector_use(&proxy->pci_dev, val) < 0) {
1310             val = VIRTIO_NO_VECTOR;
1311         }
1312         virtio_queue_set_vector(vdev, vdev->queue_sel, val);
1313         break;
1314     case VIRTIO_PCI_COMMON_Q_ENABLE:
1315         virtio_queue_set_num(vdev, vdev->queue_sel,
1316                              proxy->vqs[vdev->queue_sel].num);
1317         virtio_queue_set_rings(vdev, vdev->queue_sel,
1318                        ((uint64_t)proxy->vqs[vdev->queue_sel].desc[1]) << 32 |
1319                        proxy->vqs[vdev->queue_sel].desc[0],
1320                        ((uint64_t)proxy->vqs[vdev->queue_sel].avail[1]) << 32 |
1321                        proxy->vqs[vdev->queue_sel].avail[0],
1322                        ((uint64_t)proxy->vqs[vdev->queue_sel].used[1]) << 32 |
1323                        proxy->vqs[vdev->queue_sel].used[0]);
1324         proxy->vqs[vdev->queue_sel].enabled = 1;
1325         break;
1326     case VIRTIO_PCI_COMMON_Q_DESCLO:
1327         proxy->vqs[vdev->queue_sel].desc[0] = val;
1328         break;
1329     case VIRTIO_PCI_COMMON_Q_DESCHI:
1330         proxy->vqs[vdev->queue_sel].desc[1] = val;
1331         break;
1332     case VIRTIO_PCI_COMMON_Q_AVAILLO:
1333         proxy->vqs[vdev->queue_sel].avail[0] = val;
1334         break;
1335     case VIRTIO_PCI_COMMON_Q_AVAILHI:
1336         proxy->vqs[vdev->queue_sel].avail[1] = val;
1337         break;
1338     case VIRTIO_PCI_COMMON_Q_USEDLO:
1339         proxy->vqs[vdev->queue_sel].used[0] = val;
1340         break;
1341     case VIRTIO_PCI_COMMON_Q_USEDHI:
1342         proxy->vqs[vdev->queue_sel].used[1] = val;
1343         break;
1344     default:
1345         break;
1346     }
1347 }
1348
1349
1350 static uint64_t virtio_pci_notify_read(void *opaque, hwaddr addr,
1351                                        unsigned size)
1352 {
1353     return 0;
1354 }
1355
1356 static void virtio_pci_notify_write(void *opaque, hwaddr addr,
1357                                     uint64_t val, unsigned size)
1358 {
1359     VirtIODevice *vdev = opaque;
1360     VirtIOPCIProxy *proxy = VIRTIO_PCI(DEVICE(vdev)->parent_bus->parent);
1361     unsigned queue = addr / virtio_pci_queue_mem_mult(proxy);
1362
1363     if (queue < VIRTIO_QUEUE_MAX) {
1364         virtio_queue_notify(vdev, queue);
1365     }
1366 }
1367
1368 static void virtio_pci_notify_write_pio(void *opaque, hwaddr addr,
1369                                         uint64_t val, unsigned size)
1370 {
1371     VirtIODevice *vdev = opaque;
1372     unsigned queue = val;
1373
1374     if (queue < VIRTIO_QUEUE_MAX) {
1375         virtio_queue_notify(vdev, queue);
1376     }
1377 }
1378
1379 static uint64_t virtio_pci_isr_read(void *opaque, hwaddr addr,
1380                                     unsigned size)
1381 {
1382     VirtIOPCIProxy *proxy = opaque;
1383     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1384     uint64_t val = atomic_xchg(&vdev->isr, 0);
1385     pci_irq_deassert(&proxy->pci_dev);
1386
1387     return val;
1388 }
1389
1390 static void virtio_pci_isr_write(void *opaque, hwaddr addr,
1391                                  uint64_t val, unsigned size)
1392 {
1393 }
1394
1395 static uint64_t virtio_pci_device_read(void *opaque, hwaddr addr,
1396                                        unsigned size)
1397 {
1398     VirtIODevice *vdev = opaque;
1399     uint64_t val = 0;
1400
1401     switch (size) {
1402     case 1:
1403         val = virtio_config_modern_readb(vdev, addr);
1404         break;
1405     case 2:
1406         val = virtio_config_modern_readw(vdev, addr);
1407         break;
1408     case 4:
1409         val = virtio_config_modern_readl(vdev, addr);
1410         break;
1411     }
1412     return val;
1413 }
1414
1415 static void virtio_pci_device_write(void *opaque, hwaddr addr,
1416                                     uint64_t val, unsigned size)
1417 {
1418     VirtIODevice *vdev = opaque;
1419     switch (size) {
1420     case 1:
1421         virtio_config_modern_writeb(vdev, addr, val);
1422         break;
1423     case 2:
1424         virtio_config_modern_writew(vdev, addr, val);
1425         break;
1426     case 4:
1427         virtio_config_modern_writel(vdev, addr, val);
1428         break;
1429     }
1430 }
1431
1432 static void virtio_pci_modern_regions_init(VirtIOPCIProxy *proxy)
1433 {
1434     static const MemoryRegionOps common_ops = {
1435         .read = virtio_pci_common_read,
1436         .write = virtio_pci_common_write,
1437         .impl = {
1438             .min_access_size = 1,
1439             .max_access_size = 4,
1440         },
1441         .endianness = DEVICE_LITTLE_ENDIAN,
1442     };
1443     static const MemoryRegionOps isr_ops = {
1444         .read = virtio_pci_isr_read,
1445         .write = virtio_pci_isr_write,
1446         .impl = {
1447             .min_access_size = 1,
1448             .max_access_size = 4,
1449         },
1450         .endianness = DEVICE_LITTLE_ENDIAN,
1451     };
1452     static const MemoryRegionOps device_ops = {
1453         .read = virtio_pci_device_read,
1454         .write = virtio_pci_device_write,
1455         .impl = {
1456             .min_access_size = 1,
1457             .max_access_size = 4,
1458         },
1459         .endianness = DEVICE_LITTLE_ENDIAN,
1460     };
1461     static const MemoryRegionOps notify_ops = {
1462         .read = virtio_pci_notify_read,
1463         .write = virtio_pci_notify_write,
1464         .impl = {
1465             .min_access_size = 1,
1466             .max_access_size = 4,
1467         },
1468         .endianness = DEVICE_LITTLE_ENDIAN,
1469     };
1470     static const MemoryRegionOps notify_pio_ops = {
1471         .read = virtio_pci_notify_read,
1472         .write = virtio_pci_notify_write_pio,
1473         .impl = {
1474             .min_access_size = 1,
1475             .max_access_size = 4,
1476         },
1477         .endianness = DEVICE_LITTLE_ENDIAN,
1478     };
1479
1480
1481     memory_region_init_io(&proxy->common.mr, OBJECT(proxy),
1482                           &common_ops,
1483                           proxy,
1484                           "virtio-pci-common",
1485                           proxy->common.size);
1486
1487     memory_region_init_io(&proxy->isr.mr, OBJECT(proxy),
1488                           &isr_ops,
1489                           proxy,
1490                           "virtio-pci-isr",
1491                           proxy->isr.size);
1492
1493     memory_region_init_io(&proxy->device.mr, OBJECT(proxy),
1494                           &device_ops,
1495                           virtio_bus_get_device(&proxy->bus),
1496                           "virtio-pci-device",
1497                           proxy->device.size);
1498
1499     memory_region_init_io(&proxy->notify.mr, OBJECT(proxy),
1500                           &notify_ops,
1501                           virtio_bus_get_device(&proxy->bus),
1502                           "virtio-pci-notify",
1503                           proxy->notify.size);
1504
1505     memory_region_init_io(&proxy->notify_pio.mr, OBJECT(proxy),
1506                           &notify_pio_ops,
1507                           virtio_bus_get_device(&proxy->bus),
1508                           "virtio-pci-notify-pio",
1509                           proxy->notify_pio.size);
1510 }
1511
1512 static void virtio_pci_modern_region_map(VirtIOPCIProxy *proxy,
1513                                          VirtIOPCIRegion *region,
1514                                          struct virtio_pci_cap *cap,
1515                                          MemoryRegion *mr,
1516                                          uint8_t bar)
1517 {
1518     memory_region_add_subregion(mr, region->offset, &region->mr);
1519
1520     cap->cfg_type = region->type;
1521     cap->bar = bar;
1522     cap->offset = cpu_to_le32(region->offset);
1523     cap->length = cpu_to_le32(region->size);
1524     virtio_pci_add_mem_cap(proxy, cap);
1525
1526 }
1527
1528 static void virtio_pci_modern_mem_region_map(VirtIOPCIProxy *proxy,
1529                                              VirtIOPCIRegion *region,
1530                                              struct virtio_pci_cap *cap)
1531 {
1532     virtio_pci_modern_region_map(proxy, region, cap,
1533                                  &proxy->modern_bar, proxy->modern_mem_bar_idx);
1534 }
1535
1536 static void virtio_pci_modern_io_region_map(VirtIOPCIProxy *proxy,
1537                                             VirtIOPCIRegion *region,
1538                                             struct virtio_pci_cap *cap)
1539 {
1540     virtio_pci_modern_region_map(proxy, region, cap,
1541                                  &proxy->io_bar, proxy->modern_io_bar_idx);
1542 }
1543
1544 static void virtio_pci_modern_mem_region_unmap(VirtIOPCIProxy *proxy,
1545                                                VirtIOPCIRegion *region)
1546 {
1547     memory_region_del_subregion(&proxy->modern_bar,
1548                                 &region->mr);
1549 }
1550
1551 static void virtio_pci_modern_io_region_unmap(VirtIOPCIProxy *proxy,
1552                                               VirtIOPCIRegion *region)
1553 {
1554     memory_region_del_subregion(&proxy->io_bar,
1555                                 &region->mr);
1556 }
1557
1558 static void virtio_pci_pre_plugged(DeviceState *d, Error **errp)
1559 {
1560     VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1561     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1562
1563     if (virtio_pci_modern(proxy)) {
1564         virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1565     }
1566
1567     virtio_add_feature(&vdev->host_features, VIRTIO_F_BAD_FEATURE);
1568 }
1569
1570 /* This is called by virtio-bus just after the device is plugged. */
1571 static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
1572 {
1573     VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1574     VirtioBusState *bus = &proxy->bus;
1575     bool legacy = virtio_pci_legacy(proxy);
1576     bool modern;
1577     bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
1578     uint8_t *config;
1579     uint32_t size;
1580     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1581
1582     /*
1583      * Virtio capabilities present without
1584      * VIRTIO_F_VERSION_1 confuses guests
1585      */
1586     if (!proxy->ignore_backend_features &&
1587             !virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) {
1588         virtio_pci_disable_modern(proxy);
1589
1590         if (!legacy) {
1591             error_setg(errp, "Device doesn't support modern mode, and legacy"
1592                              " mode is disabled");
1593             error_append_hint(errp, "Set disable-legacy to off\n");
1594
1595             return;
1596         }
1597     }
1598
1599     modern = virtio_pci_modern(proxy);
1600
1601     config = proxy->pci_dev.config;
1602     if (proxy->class_code) {
1603         pci_config_set_class(config, proxy->class_code);
1604     }
1605
1606     if (legacy) {
1607         if (virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM)) {
1608             error_setg(errp, "VIRTIO_F_IOMMU_PLATFORM was supported by"
1609                        " neither legacy nor transitional device");
1610             return ;
1611         }
1612         /*
1613          * Legacy and transitional devices use specific subsystem IDs.
1614          * Note that the subsystem vendor ID (config + PCI_SUBSYSTEM_VENDOR_ID)
1615          * is set to PCI_SUBVENDOR_ID_REDHAT_QUMRANET by default.
1616          */
1617         pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
1618     } else {
1619         /* pure virtio-1.0 */
1620         pci_set_word(config + PCI_VENDOR_ID,
1621                      PCI_VENDOR_ID_REDHAT_QUMRANET);
1622         pci_set_word(config + PCI_DEVICE_ID,
1623                      0x1040 + virtio_bus_get_vdev_id(bus));
1624         pci_config_set_revision(config, 1);
1625     }
1626     config[PCI_INTERRUPT_PIN] = 1;
1627
1628
1629     if (modern) {
1630         struct virtio_pci_cap cap = {
1631             .cap_len = sizeof cap,
1632         };
1633         struct virtio_pci_notify_cap notify = {
1634             .cap.cap_len = sizeof notify,
1635             .notify_off_multiplier =
1636                 cpu_to_le32(virtio_pci_queue_mem_mult(proxy)),
1637         };
1638         struct virtio_pci_cfg_cap cfg = {
1639             .cap.cap_len = sizeof cfg,
1640             .cap.cfg_type = VIRTIO_PCI_CAP_PCI_CFG,
1641         };
1642         struct virtio_pci_notify_cap notify_pio = {
1643             .cap.cap_len = sizeof notify,
1644             .notify_off_multiplier = cpu_to_le32(0x0),
1645         };
1646
1647         struct virtio_pci_cfg_cap *cfg_mask;
1648
1649         virtio_pci_modern_regions_init(proxy);
1650
1651         virtio_pci_modern_mem_region_map(proxy, &proxy->common, &cap);
1652         virtio_pci_modern_mem_region_map(proxy, &proxy->isr, &cap);
1653         virtio_pci_modern_mem_region_map(proxy, &proxy->device, &cap);
1654         virtio_pci_modern_mem_region_map(proxy, &proxy->notify, &notify.cap);
1655
1656         if (modern_pio) {
1657             memory_region_init(&proxy->io_bar, OBJECT(proxy),
1658                                "virtio-pci-io", 0x4);
1659
1660             pci_register_bar(&proxy->pci_dev, proxy->modern_io_bar_idx,
1661                              PCI_BASE_ADDRESS_SPACE_IO, &proxy->io_bar);
1662
1663             virtio_pci_modern_io_region_map(proxy, &proxy->notify_pio,
1664                                             &notify_pio.cap);
1665         }
1666
1667         pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar_idx,
1668                          PCI_BASE_ADDRESS_SPACE_MEMORY |
1669                          PCI_BASE_ADDRESS_MEM_PREFETCH |
1670                          PCI_BASE_ADDRESS_MEM_TYPE_64,
1671                          &proxy->modern_bar);
1672
1673         proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap);
1674         cfg_mask = (void *)(proxy->pci_dev.wmask + proxy->config_cap);
1675         pci_set_byte(&cfg_mask->cap.bar, ~0x0);
1676         pci_set_long((uint8_t *)&cfg_mask->cap.offset, ~0x0);
1677         pci_set_long((uint8_t *)&cfg_mask->cap.length, ~0x0);
1678         pci_set_long(cfg_mask->pci_cfg_data, ~0x0);
1679     }
1680
1681     if (proxy->nvectors) {
1682         int err = msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors,
1683                                           proxy->msix_bar_idx, NULL);
1684         if (err) {
1685             /* Notice when a system that supports MSIx can't initialize it */
1686             if (err != -ENOTSUP) {
1687                 error_report("unable to init msix vectors to %" PRIu32,
1688                              proxy->nvectors);
1689             }
1690             proxy->nvectors = 0;
1691         }
1692     }
1693
1694     proxy->pci_dev.config_write = virtio_write_config;
1695     proxy->pci_dev.config_read = virtio_read_config;
1696
1697     if (legacy) {
1698         size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev)
1699             + virtio_bus_get_vdev_config_len(bus);
1700         size = pow2ceil(size);
1701
1702         memory_region_init_io(&proxy->bar, OBJECT(proxy),
1703                               &virtio_pci_config_ops,
1704                               proxy, "virtio-pci", size);
1705
1706         pci_register_bar(&proxy->pci_dev, proxy->legacy_io_bar_idx,
1707                          PCI_BASE_ADDRESS_SPACE_IO, &proxy->bar);
1708     }
1709 }
1710
1711 static void virtio_pci_device_unplugged(DeviceState *d)
1712 {
1713     VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1714     bool modern = virtio_pci_modern(proxy);
1715     bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
1716
1717     virtio_pci_stop_ioeventfd(proxy);
1718
1719     if (modern) {
1720         virtio_pci_modern_mem_region_unmap(proxy, &proxy->common);
1721         virtio_pci_modern_mem_region_unmap(proxy, &proxy->isr);
1722         virtio_pci_modern_mem_region_unmap(proxy, &proxy->device);
1723         virtio_pci_modern_mem_region_unmap(proxy, &proxy->notify);
1724         if (modern_pio) {
1725             virtio_pci_modern_io_region_unmap(proxy, &proxy->notify_pio);
1726         }
1727     }
1728 }
1729
1730 static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
1731 {
1732     VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
1733     VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev);
1734     bool pcie_port = pci_bus_is_express(pci_get_bus(pci_dev)) &&
1735                      !pci_bus_is_root(pci_get_bus(pci_dev));
1736
1737     if (kvm_enabled() && !kvm_has_many_ioeventfds()) {
1738         proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
1739     }
1740
1741     /*
1742      * virtio pci bar layout used by default.
1743      * subclasses can re-arrange things if needed.
1744      *
1745      *   region 0   --  virtio legacy io bar
1746      *   region 1   --  msi-x bar
1747      *   region 4+5 --  virtio modern memory (64bit) bar
1748      *
1749      */
1750     proxy->legacy_io_bar_idx  = 0;
1751     proxy->msix_bar_idx       = 1;
1752     proxy->modern_io_bar_idx  = 2;
1753     proxy->modern_mem_bar_idx = 4;
1754
1755     proxy->common.offset = 0x0;
1756     proxy->common.size = 0x1000;
1757     proxy->common.type = VIRTIO_PCI_CAP_COMMON_CFG;
1758
1759     proxy->isr.offset = 0x1000;
1760     proxy->isr.size = 0x1000;
1761     proxy->isr.type = VIRTIO_PCI_CAP_ISR_CFG;
1762
1763     proxy->device.offset = 0x2000;
1764     proxy->device.size = 0x1000;
1765     proxy->device.type = VIRTIO_PCI_CAP_DEVICE_CFG;
1766
1767     proxy->notify.offset = 0x3000;
1768     proxy->notify.size = virtio_pci_queue_mem_mult(proxy) * VIRTIO_QUEUE_MAX;
1769     proxy->notify.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
1770
1771     proxy->notify_pio.offset = 0x0;
1772     proxy->notify_pio.size = 0x4;
1773     proxy->notify_pio.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
1774
1775     /* subclasses can enforce modern, so do this unconditionally */
1776     memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci",
1777                        /* PCI BAR regions must be powers of 2 */
1778                        pow2ceil(proxy->notify.offset + proxy->notify.size));
1779
1780     if (proxy->disable_legacy == ON_OFF_AUTO_AUTO) {
1781         proxy->disable_legacy = pcie_port ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF;
1782     }
1783
1784     if (!virtio_pci_modern(proxy) && !virtio_pci_legacy(proxy)) {
1785         error_setg(errp, "device cannot work as neither modern nor legacy mode"
1786                    " is enabled");
1787         error_append_hint(errp, "Set either disable-modern or disable-legacy"
1788                           " to off\n");
1789         return;
1790     }
1791
1792     if (pcie_port && pci_is_express(pci_dev)) {
1793         int pos;
1794
1795         pos = pcie_endpoint_cap_init(pci_dev, 0);
1796         assert(pos > 0);
1797
1798         pos = pci_add_capability(pci_dev, PCI_CAP_ID_PM, 0,
1799                                  PCI_PM_SIZEOF, errp);
1800         if (pos < 0) {
1801             return;
1802         }
1803
1804         pci_dev->exp.pm_cap = pos;
1805
1806         /*
1807          * Indicates that this function complies with revision 1.2 of the
1808          * PCI Power Management Interface Specification.
1809          */
1810         pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3);
1811
1812         if (proxy->flags & VIRTIO_PCI_FLAG_INIT_DEVERR) {
1813             /* Init error enabling flags */
1814             pcie_cap_deverr_init(pci_dev);
1815         }
1816
1817         if (proxy->flags & VIRTIO_PCI_FLAG_INIT_LNKCTL) {
1818             /* Init Link Control Register */
1819             pcie_cap_lnkctl_init(pci_dev);
1820         }
1821
1822         if (proxy->flags & VIRTIO_PCI_FLAG_INIT_PM) {
1823             /* Init Power Management Control Register */
1824             pci_set_word(pci_dev->wmask + pos + PCI_PM_CTRL,
1825                          PCI_PM_CTRL_STATE_MASK);
1826         }
1827
1828         if (proxy->flags & VIRTIO_PCI_FLAG_ATS) {
1829             pcie_ats_init(pci_dev, 256);
1830         }
1831
1832     } else {
1833         /*
1834          * make future invocations of pci_is_express() return false
1835          * and pci_config_size() return PCI_CONFIG_SPACE_SIZE.
1836          */
1837         pci_dev->cap_present &= ~QEMU_PCI_CAP_EXPRESS;
1838     }
1839
1840     virtio_pci_bus_new(&proxy->bus, sizeof(proxy->bus), proxy);
1841     if (k->realize) {
1842         k->realize(proxy, errp);
1843     }
1844 }
1845
1846 static void virtio_pci_exit(PCIDevice *pci_dev)
1847 {
1848     msix_uninit_exclusive_bar(pci_dev);
1849 }
1850
1851 static void virtio_pci_reset(DeviceState *qdev)
1852 {
1853     VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1854     VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
1855     PCIDevice *dev = PCI_DEVICE(qdev);
1856     int i;
1857
1858     virtio_pci_stop_ioeventfd(proxy);
1859     virtio_bus_reset(bus);
1860     msix_unuse_all_vectors(&proxy->pci_dev);
1861
1862     for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
1863         proxy->vqs[i].enabled = 0;
1864         proxy->vqs[i].num = 0;
1865         proxy->vqs[i].desc[0] = proxy->vqs[i].desc[1] = 0;
1866         proxy->vqs[i].avail[0] = proxy->vqs[i].avail[1] = 0;
1867         proxy->vqs[i].used[0] = proxy->vqs[i].used[1] = 0;
1868     }
1869
1870     if (pci_is_express(dev)) {
1871         pcie_cap_deverr_reset(dev);
1872         pcie_cap_lnkctl_reset(dev);
1873
1874         pci_set_word(dev->config + dev->exp.pm_cap + PCI_PM_CTRL, 0);
1875     }
1876 }
1877
1878 static Property virtio_pci_properties[] = {
1879     DEFINE_PROP_BIT("virtio-pci-bus-master-bug-migration", VirtIOPCIProxy, flags,
1880                     VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT, false),
1881     DEFINE_PROP_ON_OFF_AUTO("disable-legacy", VirtIOPCIProxy, disable_legacy,
1882                             ON_OFF_AUTO_AUTO),
1883     DEFINE_PROP_BOOL("disable-modern", VirtIOPCIProxy, disable_modern, false),
1884     DEFINE_PROP_BIT("migrate-extra", VirtIOPCIProxy, flags,
1885                     VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT, true),
1886     DEFINE_PROP_BIT("modern-pio-notify", VirtIOPCIProxy, flags,
1887                     VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT, false),
1888     DEFINE_PROP_BIT("x-disable-pcie", VirtIOPCIProxy, flags,
1889                     VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT, false),
1890     DEFINE_PROP_BIT("page-per-vq", VirtIOPCIProxy, flags,
1891                     VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT, false),
1892     DEFINE_PROP_BOOL("x-ignore-backend-features", VirtIOPCIProxy,
1893                      ignore_backend_features, false),
1894     DEFINE_PROP_BIT("ats", VirtIOPCIProxy, flags,
1895                     VIRTIO_PCI_FLAG_ATS_BIT, false),
1896     DEFINE_PROP_BIT("x-pcie-deverr-init", VirtIOPCIProxy, flags,
1897                     VIRTIO_PCI_FLAG_INIT_DEVERR_BIT, true),
1898     DEFINE_PROP_BIT("x-pcie-lnkctl-init", VirtIOPCIProxy, flags,
1899                     VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT, true),
1900     DEFINE_PROP_BIT("x-pcie-pm-init", VirtIOPCIProxy, flags,
1901                     VIRTIO_PCI_FLAG_INIT_PM_BIT, true),
1902     DEFINE_PROP_END_OF_LIST(),
1903 };
1904
1905 static void virtio_pci_dc_realize(DeviceState *qdev, Error **errp)
1906 {
1907     VirtioPCIClass *vpciklass = VIRTIO_PCI_GET_CLASS(qdev);
1908     VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1909     PCIDevice *pci_dev = &proxy->pci_dev;
1910
1911     if (!(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_PCIE) &&
1912         virtio_pci_modern(proxy)) {
1913         pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
1914     }
1915
1916     vpciklass->parent_dc_realize(qdev, errp);
1917 }
1918
1919 static void virtio_pci_class_init(ObjectClass *klass, void *data)
1920 {
1921     DeviceClass *dc = DEVICE_CLASS(klass);
1922     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1923     VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
1924
1925     dc->props = virtio_pci_properties;
1926     k->realize = virtio_pci_realize;
1927     k->exit = virtio_pci_exit;
1928     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1929     k->revision = VIRTIO_PCI_ABI_VERSION;
1930     k->class_id = PCI_CLASS_OTHERS;
1931     device_class_set_parent_realize(dc, virtio_pci_dc_realize,
1932                                     &vpciklass->parent_dc_realize);
1933     dc->reset = virtio_pci_reset;
1934 }
1935
1936 static const TypeInfo virtio_pci_info = {
1937     .name          = TYPE_VIRTIO_PCI,
1938     .parent        = TYPE_PCI_DEVICE,
1939     .instance_size = sizeof(VirtIOPCIProxy),
1940     .class_init    = virtio_pci_class_init,
1941     .class_size    = sizeof(VirtioPCIClass),
1942     .abstract      = true,
1943     .interfaces = (InterfaceInfo[]) {
1944         { INTERFACE_PCIE_DEVICE },
1945         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
1946         { }
1947     },
1948 };
1949
1950 /* virtio-blk-pci */
1951
1952 static Property virtio_blk_pci_properties[] = {
1953     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1954     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1955                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1956     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
1957                        DEV_NVECTORS_UNSPECIFIED),
1958     DEFINE_PROP_END_OF_LIST(),
1959 };
1960
1961 static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
1962 {
1963     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
1964     DeviceState *vdev = DEVICE(&dev->vdev);
1965
1966     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1967         vpci_dev->nvectors = dev->vdev.conf.num_queues + 1;
1968     }
1969
1970     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1971     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
1972 }
1973
1974 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
1975 {
1976     DeviceClass *dc = DEVICE_CLASS(klass);
1977     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1978     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1979
1980     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1981     dc->props = virtio_blk_pci_properties;
1982     k->realize = virtio_blk_pci_realize;
1983     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1984     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
1985     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1986     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1987 }
1988
1989 static void virtio_blk_pci_instance_init(Object *obj)
1990 {
1991     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
1992
1993     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1994                                 TYPE_VIRTIO_BLK);
1995     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
1996                               "bootindex", &error_abort);
1997 }
1998
1999 static const TypeInfo virtio_blk_pci_info = {
2000     .name          = TYPE_VIRTIO_BLK_PCI,
2001     .parent        = TYPE_VIRTIO_PCI,
2002     .instance_size = sizeof(VirtIOBlkPCI),
2003     .instance_init = virtio_blk_pci_instance_init,
2004     .class_init    = virtio_blk_pci_class_init,
2005 };
2006
2007 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX)
2008 /* vhost-user-blk */
2009
2010 static Property vhost_user_blk_pci_properties[] = {
2011     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
2012     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
2013                        DEV_NVECTORS_UNSPECIFIED),
2014     DEFINE_PROP_END_OF_LIST(),
2015 };
2016
2017 static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2018 {
2019     VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev);
2020     DeviceState *vdev = DEVICE(&dev->vdev);
2021
2022     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2023         vpci_dev->nvectors = dev->vdev.num_queues + 1;
2024     }
2025
2026     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2027     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2028 }
2029
2030 static void vhost_user_blk_pci_class_init(ObjectClass *klass, void *data)
2031 {
2032     DeviceClass *dc = DEVICE_CLASS(klass);
2033     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2034     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2035
2036     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2037     dc->props = vhost_user_blk_pci_properties;
2038     k->realize = vhost_user_blk_pci_realize;
2039     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2040     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
2041     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2042     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2043 }
2044
2045 static void vhost_user_blk_pci_instance_init(Object *obj)
2046 {
2047     VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj);
2048
2049     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2050                                 TYPE_VHOST_USER_BLK);
2051     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2052                               "bootindex", &error_abort);
2053 }
2054
2055 static const TypeInfo vhost_user_blk_pci_info = {
2056     .name           = TYPE_VHOST_USER_BLK_PCI,
2057     .parent         = TYPE_VIRTIO_PCI,
2058     .instance_size  = sizeof(VHostUserBlkPCI),
2059     .instance_init  = vhost_user_blk_pci_instance_init,
2060     .class_init     = vhost_user_blk_pci_class_init,
2061 };
2062 #endif
2063
2064 /* virtio-scsi-pci */
2065
2066 static Property virtio_scsi_pci_properties[] = {
2067     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2068                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
2069     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
2070                        DEV_NVECTORS_UNSPECIFIED),
2071     DEFINE_PROP_END_OF_LIST(),
2072 };
2073
2074 static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2075 {
2076     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
2077     DeviceState *vdev = DEVICE(&dev->vdev);
2078     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
2079     DeviceState *proxy = DEVICE(vpci_dev);
2080     char *bus_name;
2081
2082     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2083         vpci_dev->nvectors = vs->conf.num_queues + 3;
2084     }
2085
2086     /*
2087      * For command line compatibility, this sets the virtio-scsi-device bus
2088      * name as before.
2089      */
2090     if (proxy->id) {
2091         bus_name = g_strdup_printf("%s.0", proxy->id);
2092         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
2093         g_free(bus_name);
2094     }
2095
2096     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2097     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2098 }
2099
2100 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
2101 {
2102     DeviceClass *dc = DEVICE_CLASS(klass);
2103     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2104     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2105
2106     k->realize = virtio_scsi_pci_realize;
2107     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2108     dc->props = virtio_scsi_pci_properties;
2109     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2110     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
2111     pcidev_k->revision = 0x00;
2112     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2113 }
2114
2115 static void virtio_scsi_pci_instance_init(Object *obj)
2116 {
2117     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
2118
2119     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2120                                 TYPE_VIRTIO_SCSI);
2121 }
2122
2123 static const TypeInfo virtio_scsi_pci_info = {
2124     .name          = TYPE_VIRTIO_SCSI_PCI,
2125     .parent        = TYPE_VIRTIO_PCI,
2126     .instance_size = sizeof(VirtIOSCSIPCI),
2127     .instance_init = virtio_scsi_pci_instance_init,
2128     .class_init    = virtio_scsi_pci_class_init,
2129 };
2130
2131 /* vhost-scsi-pci */
2132
2133 #ifdef CONFIG_VHOST_SCSI
2134 static Property vhost_scsi_pci_properties[] = {
2135     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
2136                        DEV_NVECTORS_UNSPECIFIED),
2137     DEFINE_PROP_END_OF_LIST(),
2138 };
2139
2140 static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2141 {
2142     VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
2143     DeviceState *vdev = DEVICE(&dev->vdev);
2144     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
2145
2146     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2147         vpci_dev->nvectors = vs->conf.num_queues + 3;
2148     }
2149
2150     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2151     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2152 }
2153
2154 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data)
2155 {
2156     DeviceClass *dc = DEVICE_CLASS(klass);
2157     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2158     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2159     k->realize = vhost_scsi_pci_realize;
2160     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2161     dc->props = vhost_scsi_pci_properties;
2162     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2163     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
2164     pcidev_k->revision = 0x00;
2165     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2166 }
2167
2168 static void vhost_scsi_pci_instance_init(Object *obj)
2169 {
2170     VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
2171
2172     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2173                                 TYPE_VHOST_SCSI);
2174     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2175                               "bootindex", &error_abort);
2176 }
2177
2178 static const TypeInfo vhost_scsi_pci_info = {
2179     .name          = TYPE_VHOST_SCSI_PCI,
2180     .parent        = TYPE_VIRTIO_PCI,
2181     .instance_size = sizeof(VHostSCSIPCI),
2182     .instance_init = vhost_scsi_pci_instance_init,
2183     .class_init    = vhost_scsi_pci_class_init,
2184 };
2185 #endif
2186
2187 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX)
2188 /* vhost-user-scsi-pci */
2189 static Property vhost_user_scsi_pci_properties[] = {
2190     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
2191                        DEV_NVECTORS_UNSPECIFIED),
2192     DEFINE_PROP_END_OF_LIST(),
2193 };
2194
2195 static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2196 {
2197     VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(vpci_dev);
2198     DeviceState *vdev = DEVICE(&dev->vdev);
2199     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
2200
2201     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2202         vpci_dev->nvectors = vs->conf.num_queues + 3;
2203     }
2204
2205     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2206     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2207 }
2208
2209 static void vhost_user_scsi_pci_class_init(ObjectClass *klass, void *data)
2210 {
2211     DeviceClass *dc = DEVICE_CLASS(klass);
2212     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2213     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2214     k->realize = vhost_user_scsi_pci_realize;
2215     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2216     dc->props = vhost_user_scsi_pci_properties;
2217     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2218     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
2219     pcidev_k->revision = 0x00;
2220     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2221 }
2222
2223 static void vhost_user_scsi_pci_instance_init(Object *obj)
2224 {
2225     VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj);
2226
2227     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2228                                 TYPE_VHOST_USER_SCSI);
2229     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2230                               "bootindex", &error_abort);
2231 }
2232
2233 static const TypeInfo vhost_user_scsi_pci_info = {
2234     .name          = TYPE_VHOST_USER_SCSI_PCI,
2235     .parent        = TYPE_VIRTIO_PCI,
2236     .instance_size = sizeof(VHostUserSCSIPCI),
2237     .instance_init = vhost_user_scsi_pci_instance_init,
2238     .class_init    = vhost_user_scsi_pci_class_init,
2239 };
2240 #endif
2241
2242 /* vhost-vsock-pci */
2243
2244 #ifdef CONFIG_VHOST_VSOCK
2245 static Property vhost_vsock_pci_properties[] = {
2246     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
2247     DEFINE_PROP_END_OF_LIST(),
2248 };
2249
2250 static void vhost_vsock_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2251 {
2252     VHostVSockPCI *dev = VHOST_VSOCK_PCI(vpci_dev);
2253     DeviceState *vdev = DEVICE(&dev->vdev);
2254
2255     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2256     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2257 }
2258
2259 static void vhost_vsock_pci_class_init(ObjectClass *klass, void *data)
2260 {
2261     DeviceClass *dc = DEVICE_CLASS(klass);
2262     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2263     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2264     k->realize = vhost_vsock_pci_realize;
2265     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
2266     dc->props = vhost_vsock_pci_properties;
2267     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2268     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_VSOCK;
2269     pcidev_k->revision = 0x00;
2270     pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
2271 }
2272
2273 static void vhost_vsock_pci_instance_init(Object *obj)
2274 {
2275     VHostVSockPCI *dev = VHOST_VSOCK_PCI(obj);
2276
2277     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2278                                 TYPE_VHOST_VSOCK);
2279 }
2280
2281 static const TypeInfo vhost_vsock_pci_info = {
2282     .name          = TYPE_VHOST_VSOCK_PCI,
2283     .parent        = TYPE_VIRTIO_PCI,
2284     .instance_size = sizeof(VHostVSockPCI),
2285     .instance_init = vhost_vsock_pci_instance_init,
2286     .class_init    = vhost_vsock_pci_class_init,
2287 };
2288 #endif
2289
2290 /* virtio-balloon-pci */
2291
2292 static Property virtio_balloon_pci_properties[] = {
2293     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
2294     DEFINE_PROP_END_OF_LIST(),
2295 };
2296
2297 static void virtio_balloon_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2298 {
2299     VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev);
2300     DeviceState *vdev = DEVICE(&dev->vdev);
2301
2302     if (vpci_dev->class_code != PCI_CLASS_OTHERS &&
2303         vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
2304         vpci_dev->class_code = PCI_CLASS_OTHERS;
2305     }
2306
2307     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2308     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2309 }
2310
2311 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data)
2312 {
2313     DeviceClass *dc = DEVICE_CLASS(klass);
2314     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2315     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2316     k->realize = virtio_balloon_pci_realize;
2317     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
2318     dc->props = virtio_balloon_pci_properties;
2319     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2320     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON;
2321     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2322     pcidev_k->class_id = PCI_CLASS_OTHERS;
2323 }
2324
2325 static void virtio_balloon_pci_instance_init(Object *obj)
2326 {
2327     VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj);
2328
2329     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2330                                 TYPE_VIRTIO_BALLOON);
2331     object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev),
2332                                   "guest-stats", &error_abort);
2333     object_property_add_alias(obj, "guest-stats-polling-interval",
2334                               OBJECT(&dev->vdev),
2335                               "guest-stats-polling-interval", &error_abort);
2336 }
2337
2338 static const TypeInfo virtio_balloon_pci_info = {
2339     .name          = TYPE_VIRTIO_BALLOON_PCI,
2340     .parent        = TYPE_VIRTIO_PCI,
2341     .instance_size = sizeof(VirtIOBalloonPCI),
2342     .instance_init = virtio_balloon_pci_instance_init,
2343     .class_init    = virtio_balloon_pci_class_init,
2344 };
2345
2346 /* virtio-serial-pci */
2347
2348 static void virtio_serial_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2349 {
2350     VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev);
2351     DeviceState *vdev = DEVICE(&dev->vdev);
2352     DeviceState *proxy = DEVICE(vpci_dev);
2353     char *bus_name;
2354
2355     if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
2356         vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
2357         vpci_dev->class_code != PCI_CLASS_OTHERS) {        /* qemu-kvm  */
2358             vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER;
2359     }
2360
2361     /* backwards-compatibility with machines that were created with
2362        DEV_NVECTORS_UNSPECIFIED */
2363     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2364         vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1;
2365     }
2366
2367     /*
2368      * For command line compatibility, this sets the virtio-serial-device bus
2369      * name as before.
2370      */
2371     if (proxy->id) {
2372         bus_name = g_strdup_printf("%s.0", proxy->id);
2373         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
2374         g_free(bus_name);
2375     }
2376
2377     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2378     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2379 }
2380
2381 static Property virtio_serial_pci_properties[] = {
2382     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2383                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
2384     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
2385     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
2386     DEFINE_PROP_END_OF_LIST(),
2387 };
2388
2389 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data)
2390 {
2391     DeviceClass *dc = DEVICE_CLASS(klass);
2392     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2393     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2394     k->realize = virtio_serial_pci_realize;
2395     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
2396     dc->props = virtio_serial_pci_properties;
2397     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2398     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
2399     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2400     pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
2401 }
2402
2403 static void virtio_serial_pci_instance_init(Object *obj)
2404 {
2405     VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj);
2406
2407     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2408                                 TYPE_VIRTIO_SERIAL);
2409 }
2410
2411 static const TypeInfo virtio_serial_pci_info = {
2412     .name          = TYPE_VIRTIO_SERIAL_PCI,
2413     .parent        = TYPE_VIRTIO_PCI,
2414     .instance_size = sizeof(VirtIOSerialPCI),
2415     .instance_init = virtio_serial_pci_instance_init,
2416     .class_init    = virtio_serial_pci_class_init,
2417 };
2418
2419 /* virtio-net-pci */
2420
2421 static Property virtio_net_properties[] = {
2422     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2423                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
2424     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
2425     DEFINE_PROP_END_OF_LIST(),
2426 };
2427
2428 static void virtio_net_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2429 {
2430     DeviceState *qdev = DEVICE(vpci_dev);
2431     VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev);
2432     DeviceState *vdev = DEVICE(&dev->vdev);
2433
2434     virtio_net_set_netclient_name(&dev->vdev, qdev->id,
2435                                   object_get_typename(OBJECT(qdev)));
2436     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2437     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2438 }
2439
2440 static void virtio_net_pci_class_init(ObjectClass *klass, void *data)
2441 {
2442     DeviceClass *dc = DEVICE_CLASS(klass);
2443     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
2444     VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
2445
2446     k->romfile = "efi-virtio.rom";
2447     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2448     k->device_id = PCI_DEVICE_ID_VIRTIO_NET;
2449     k->revision = VIRTIO_PCI_ABI_VERSION;
2450     k->class_id = PCI_CLASS_NETWORK_ETHERNET;
2451     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
2452     dc->props = virtio_net_properties;
2453     vpciklass->realize = virtio_net_pci_realize;
2454 }
2455
2456 static void virtio_net_pci_instance_init(Object *obj)
2457 {
2458     VirtIONetPCI *dev = VIRTIO_NET_PCI(obj);
2459
2460     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2461                                 TYPE_VIRTIO_NET);
2462     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2463                               "bootindex", &error_abort);
2464 }
2465
2466 static const TypeInfo virtio_net_pci_info = {
2467     .name          = TYPE_VIRTIO_NET_PCI,
2468     .parent        = TYPE_VIRTIO_PCI,
2469     .instance_size = sizeof(VirtIONetPCI),
2470     .instance_init = virtio_net_pci_instance_init,
2471     .class_init    = virtio_net_pci_class_init,
2472 };
2473
2474 /* virtio-rng-pci */
2475
2476 static void virtio_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2477 {
2478     VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev);
2479     DeviceState *vdev = DEVICE(&vrng->vdev);
2480     Error *err = NULL;
2481
2482     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2483     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
2484     if (err) {
2485         error_propagate(errp, err);
2486         return;
2487     }
2488
2489     object_property_set_link(OBJECT(vrng),
2490                              OBJECT(vrng->vdev.conf.rng), "rng",
2491                              NULL);
2492 }
2493
2494 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data)
2495 {
2496     DeviceClass *dc = DEVICE_CLASS(klass);
2497     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2498     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2499
2500     k->realize = virtio_rng_pci_realize;
2501     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
2502
2503     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2504     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG;
2505     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2506     pcidev_k->class_id = PCI_CLASS_OTHERS;
2507 }
2508
2509 static void virtio_rng_initfn(Object *obj)
2510 {
2511     VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj);
2512
2513     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2514                                 TYPE_VIRTIO_RNG);
2515 }
2516
2517 static const TypeInfo virtio_rng_pci_info = {
2518     .name          = TYPE_VIRTIO_RNG_PCI,
2519     .parent        = TYPE_VIRTIO_PCI,
2520     .instance_size = sizeof(VirtIORngPCI),
2521     .instance_init = virtio_rng_initfn,
2522     .class_init    = virtio_rng_pci_class_init,
2523 };
2524
2525 /* virtio-input-pci */
2526
2527 static Property virtio_input_pci_properties[] = {
2528     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
2529     DEFINE_PROP_END_OF_LIST(),
2530 };
2531
2532 static void virtio_input_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2533 {
2534     VirtIOInputPCI *vinput = VIRTIO_INPUT_PCI(vpci_dev);
2535     DeviceState *vdev = DEVICE(&vinput->vdev);
2536
2537     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2538     virtio_pci_force_virtio_1(vpci_dev);
2539     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2540 }
2541
2542 static void virtio_input_pci_class_init(ObjectClass *klass, void *data)
2543 {
2544     DeviceClass *dc = DEVICE_CLASS(klass);
2545     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2546     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2547
2548     dc->props = virtio_input_pci_properties;
2549     k->realize = virtio_input_pci_realize;
2550     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
2551
2552     pcidev_k->class_id = PCI_CLASS_INPUT_OTHER;
2553 }
2554
2555 static void virtio_input_hid_kbd_pci_class_init(ObjectClass *klass, void *data)
2556 {
2557     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2558
2559     pcidev_k->class_id = PCI_CLASS_INPUT_KEYBOARD;
2560 }
2561
2562 static void virtio_input_hid_mouse_pci_class_init(ObjectClass *klass,
2563                                                   void *data)
2564 {
2565     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2566
2567     pcidev_k->class_id = PCI_CLASS_INPUT_MOUSE;
2568 }
2569
2570 static void virtio_keyboard_initfn(Object *obj)
2571 {
2572     VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2573
2574     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2575                                 TYPE_VIRTIO_KEYBOARD);
2576 }
2577
2578 static void virtio_mouse_initfn(Object *obj)
2579 {
2580     VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2581
2582     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2583                                 TYPE_VIRTIO_MOUSE);
2584 }
2585
2586 static void virtio_tablet_initfn(Object *obj)
2587 {
2588     VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2589
2590     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2591                                 TYPE_VIRTIO_TABLET);
2592 }
2593
2594 static const TypeInfo virtio_input_pci_info = {
2595     .name          = TYPE_VIRTIO_INPUT_PCI,
2596     .parent        = TYPE_VIRTIO_PCI,
2597     .instance_size = sizeof(VirtIOInputPCI),
2598     .class_init    = virtio_input_pci_class_init,
2599     .abstract      = true,
2600 };
2601
2602 static const TypeInfo virtio_input_hid_pci_info = {
2603     .name          = TYPE_VIRTIO_INPUT_HID_PCI,
2604     .parent        = TYPE_VIRTIO_INPUT_PCI,
2605     .instance_size = sizeof(VirtIOInputHIDPCI),
2606     .abstract      = true,
2607 };
2608
2609 static const TypeInfo virtio_keyboard_pci_info = {
2610     .name          = TYPE_VIRTIO_KEYBOARD_PCI,
2611     .parent        = TYPE_VIRTIO_INPUT_HID_PCI,
2612     .class_init    = virtio_input_hid_kbd_pci_class_init,
2613     .instance_size = sizeof(VirtIOInputHIDPCI),
2614     .instance_init = virtio_keyboard_initfn,
2615 };
2616
2617 static const TypeInfo virtio_mouse_pci_info = {
2618     .name          = TYPE_VIRTIO_MOUSE_PCI,
2619     .parent        = TYPE_VIRTIO_INPUT_HID_PCI,
2620     .class_init    = virtio_input_hid_mouse_pci_class_init,
2621     .instance_size = sizeof(VirtIOInputHIDPCI),
2622     .instance_init = virtio_mouse_initfn,
2623 };
2624
2625 static const TypeInfo virtio_tablet_pci_info = {
2626     .name          = TYPE_VIRTIO_TABLET_PCI,
2627     .parent        = TYPE_VIRTIO_INPUT_HID_PCI,
2628     .instance_size = sizeof(VirtIOInputHIDPCI),
2629     .instance_init = virtio_tablet_initfn,
2630 };
2631
2632 #ifdef CONFIG_LINUX
2633 static void virtio_host_initfn(Object *obj)
2634 {
2635     VirtIOInputHostPCI *dev = VIRTIO_INPUT_HOST_PCI(obj);
2636
2637     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2638                                 TYPE_VIRTIO_INPUT_HOST);
2639 }
2640
2641 static const TypeInfo virtio_host_pci_info = {
2642     .name          = TYPE_VIRTIO_INPUT_HOST_PCI,
2643     .parent        = TYPE_VIRTIO_INPUT_PCI,
2644     .instance_size = sizeof(VirtIOInputHostPCI),
2645     .instance_init = virtio_host_initfn,
2646 };
2647 #endif
2648
2649 /* virtio-pci-bus */
2650
2651 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
2652                                VirtIOPCIProxy *dev)
2653 {
2654     DeviceState *qdev = DEVICE(dev);
2655     char virtio_bus_name[] = "virtio-bus";
2656
2657     qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev,
2658                         virtio_bus_name);
2659 }
2660
2661 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
2662 {
2663     BusClass *bus_class = BUS_CLASS(klass);
2664     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
2665     bus_class->max_dev = 1;
2666     k->notify = virtio_pci_notify;
2667     k->save_config = virtio_pci_save_config;
2668     k->load_config = virtio_pci_load_config;
2669     k->save_queue = virtio_pci_save_queue;
2670     k->load_queue = virtio_pci_load_queue;
2671     k->save_extra_state = virtio_pci_save_extra_state;
2672     k->load_extra_state = virtio_pci_load_extra_state;
2673     k->has_extra_state = virtio_pci_has_extra_state;
2674     k->query_guest_notifiers = virtio_pci_query_guest_notifiers;
2675     k->set_guest_notifiers = virtio_pci_set_guest_notifiers;
2676     k->set_host_notifier_mr = virtio_pci_set_host_notifier_mr;
2677     k->vmstate_change = virtio_pci_vmstate_change;
2678     k->pre_plugged = virtio_pci_pre_plugged;
2679     k->device_plugged = virtio_pci_device_plugged;
2680     k->device_unplugged = virtio_pci_device_unplugged;
2681     k->query_nvectors = virtio_pci_query_nvectors;
2682     k->ioeventfd_enabled = virtio_pci_ioeventfd_enabled;
2683     k->ioeventfd_assign = virtio_pci_ioeventfd_assign;
2684     k->get_dma_as = virtio_pci_get_dma_as;
2685 }
2686
2687 static const TypeInfo virtio_pci_bus_info = {
2688     .name          = TYPE_VIRTIO_PCI_BUS,
2689     .parent        = TYPE_VIRTIO_BUS,
2690     .instance_size = sizeof(VirtioPCIBusState),
2691     .class_init    = virtio_pci_bus_class_init,
2692 };
2693
2694 static void virtio_pci_register_types(void)
2695 {
2696     type_register_static(&virtio_rng_pci_info);
2697     type_register_static(&virtio_input_pci_info);
2698     type_register_static(&virtio_input_hid_pci_info);
2699     type_register_static(&virtio_keyboard_pci_info);
2700     type_register_static(&virtio_mouse_pci_info);
2701     type_register_static(&virtio_tablet_pci_info);
2702 #ifdef CONFIG_LINUX
2703     type_register_static(&virtio_host_pci_info);
2704 #endif
2705     type_register_static(&virtio_pci_bus_info);
2706     type_register_static(&virtio_pci_info);
2707 #ifdef CONFIG_VIRTFS
2708     type_register_static(&virtio_9p_pci_info);
2709 #endif
2710     type_register_static(&virtio_blk_pci_info);
2711 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX)
2712     type_register_static(&vhost_user_blk_pci_info);
2713 #endif
2714     type_register_static(&virtio_scsi_pci_info);
2715     type_register_static(&virtio_balloon_pci_info);
2716     type_register_static(&virtio_serial_pci_info);
2717     type_register_static(&virtio_net_pci_info);
2718 #ifdef CONFIG_VHOST_SCSI
2719     type_register_static(&vhost_scsi_pci_info);
2720 #endif
2721 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX)
2722     type_register_static(&vhost_user_scsi_pci_info);
2723 #endif
2724 #ifdef CONFIG_VHOST_VSOCK
2725     type_register_static(&vhost_vsock_pci_info);
2726 #endif
2727 }
2728
2729 type_init(virtio_pci_register_types)