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, 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 void virtio_pci_load_modern_queue_state(VirtIOPCIQueue *vq,
  92                                                QEMUFile *f)
  93 {
  94     vq->num = qemu_get_be16(f);
  95     vq->enabled = qemu_get_be16(f);
  96     vq->desc[0] = qemu_get_be32(f);
  97     vq->desc[1] = qemu_get_be32(f);
  98     vq->avail[0] = qemu_get_be32(f);
  99     vq->avail[1] = qemu_get_be32(f);
 100     vq->used[0] = qemu_get_be32(f);
 101     vq->used[1] = qemu_get_be32(f);
 102 }
 103
 104 static bool virtio_pci_has_extra_state(DeviceState *d)
 105 {
 106     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 107
 108     return proxy->flags & VIRTIO_PCI_FLAG_MIGRATE_EXTRA;
 109 }
 110
 111 static int get_virtio_pci_modern_state(QEMUFile *f, void *pv, size_t size)
 112 {
 113     VirtIOPCIProxy *proxy = pv;
 114     int i;
 115
 116     proxy->dfselect = qemu_get_be32(f);
 117     proxy->gfselect = qemu_get_be32(f);
 118     proxy->guest_features[0] = qemu_get_be32(f);
 119     proxy->guest_features[1] = qemu_get_be32(f);
 120     for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
 121         virtio_pci_load_modern_queue_state(&proxy->vqs[i], f);
 122     }
 123
 124     return 0;
 125 }
 126
 127 static void virtio_pci_save_modern_queue_state(VirtIOPCIQueue *vq,
 128                                                QEMUFile *f)
 129 {
 130     qemu_put_be16(f, vq->num);
 131     qemu_put_be16(f, vq->enabled);
 132     qemu_put_be32(f, vq->desc[0]);
 133     qemu_put_be32(f, vq->desc[1]);
 134     qemu_put_be32(f, vq->avail[0]);
 135     qemu_put_be32(f, vq->avail[1]);
 136     qemu_put_be32(f, vq->used[0]);
 137     qemu_put_be32(f, vq->used[1]);
 138 }
 139
 140 static void put_virtio_pci_modern_state(QEMUFile *f, void *pv, size_t size)
 141 {
 142     VirtIOPCIProxy *proxy = pv;
 143     int i;
 144
 145     qemu_put_be32(f, proxy->dfselect);
 146     qemu_put_be32(f, proxy->gfselect);
 147     qemu_put_be32(f, proxy->guest_features[0]);
 148     qemu_put_be32(f, proxy->guest_features[1]);
 149     for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
 150         virtio_pci_save_modern_queue_state(&proxy->vqs[i], f);
 151     }
 152 }
 153
 154 static const VMStateInfo vmstate_info_virtio_pci_modern_state = {
 155     .name = "virtqueue_state",
 156     .get = get_virtio_pci_modern_state,
 157     .put = put_virtio_pci_modern_state,
 158 };
 159
 160 static bool virtio_pci_modern_state_needed(void *opaque)
 161 {
 162     VirtIOPCIProxy *proxy = opaque;
 163
 164     return !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_MODERN);
 165 }
 166
 167 static const VMStateDescription vmstate_virtio_pci_modern_state = {
 168     .name = "virtio_pci/modern_state",
 169     .version_id = 1,
 170     .minimum_version_id = 1,
 171     .needed = &virtio_pci_modern_state_needed,
 172     .fields = (VMStateField[]) {
 173         {
 174             .name         = "modern_state",
 175             .version_id   = 0,
 176             .field_exists = NULL,
 177             .size         = 0,
 178             .info         = &vmstate_info_virtio_pci_modern_state,
 179             .flags        = VMS_SINGLE,
 180             .offset       = 0,
 181         },
 182         VMSTATE_END_OF_LIST()
 183     }
 184 };
 185
 186 static const VMStateDescription vmstate_virtio_pci = {
 187     .name = "virtio_pci",
 188     .version_id = 1,
 189     .minimum_version_id = 1,
 190     .minimum_version_id_old = 1,
 191     .fields = (VMStateField[]) {
 192         VMSTATE_END_OF_LIST()
 193     },
 194     .subsections = (const VMStateDescription*[]) {
 195         &vmstate_virtio_pci_modern_state,
 196         NULL
 197     }
 198 };
 199
 200 static void virtio_pci_save_extra_state(DeviceState *d, QEMUFile *f)
 201 {
 202     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 203
 204     vmstate_save_state(f, &vmstate_virtio_pci, proxy, NULL);
 205 }
 206
 207 static int virtio_pci_load_extra_state(DeviceState *d, QEMUFile *f)
 208 {
 209     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 210
 211     return vmstate_load_state(f, &vmstate_virtio_pci, proxy, 1);
 212 }
 213
 214 static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f)
 215 {
 216     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 217     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 218
 219     if (msix_present(&proxy->pci_dev))
 220         qemu_put_be16(f, virtio_queue_vector(vdev, n));
 221 }
 222
 223 static int virtio_pci_load_config(DeviceState *d, QEMUFile *f)
 224 {
 225     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 226     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 227
 228     int ret;
 229     ret = pci_device_load(&proxy->pci_dev, f);
 230     if (ret) {
 231         return ret;
 232     }
 233     msix_unuse_all_vectors(&proxy->pci_dev);
 234     msix_load(&proxy->pci_dev, f);
 235     if (msix_present(&proxy->pci_dev)) {
 236         qemu_get_be16s(f, &vdev->config_vector);
 237     } else {
 238         vdev->config_vector = VIRTIO_NO_VECTOR;
 239     }
 240     if (vdev->config_vector != VIRTIO_NO_VECTOR) {
 241         return msix_vector_use(&proxy->pci_dev, vdev->config_vector);
 242     }
 243     return 0;
 244 }
 245
 246 static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f)
 247 {
 248     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 249     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 250
 251     uint16_t vector;
 252     if (msix_present(&proxy->pci_dev)) {
 253         qemu_get_be16s(f, &vector);
 254     } else {
 255         vector = VIRTIO_NO_VECTOR;
 256     }
 257     virtio_queue_set_vector(vdev, n, vector);
 258     if (vector != VIRTIO_NO_VECTOR) {
 259         return msix_vector_use(&proxy->pci_dev, vector);
 260     }
 261
 262     return 0;
 263 }
 264
 265 static bool virtio_pci_ioeventfd_started(DeviceState *d)
 266 {
 267     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 268
 269     return proxy->ioeventfd_started;
 270 }
 271
 272 static void virtio_pci_ioeventfd_set_started(DeviceState *d, bool started,
 273                                              bool err)
 274 {
 275     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 276
 277     proxy->ioeventfd_started = started;
 278 }
 279
 280 static bool virtio_pci_ioeventfd_disabled(DeviceState *d)
 281 {
 282     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 283
 284     return proxy->ioeventfd_disabled ||
 285         !(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD);
 286 }
 287
 288 static void virtio_pci_ioeventfd_set_disabled(DeviceState *d, bool disabled)
 289 {
 290     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 291
 292     proxy->ioeventfd_disabled = disabled;
 293 }
 294
 295 #define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000
 296
 297 static int virtio_pci_ioeventfd_assign(DeviceState *d, EventNotifier *notifier,
 298                                        int n, bool assign)
 299 {
 300     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 301     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 302     VirtQueue *vq = virtio_get_queue(vdev, n);
 303     bool legacy = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_LEGACY);
 304     bool modern = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_MODERN);
 305     bool fast_mmio = kvm_ioeventfd_any_length_enabled();
 306     bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
 307     MemoryRegion *modern_mr = &proxy->notify.mr;
 308     MemoryRegion *modern_notify_mr = &proxy->notify_pio.mr;
 309     MemoryRegion *legacy_mr = &proxy->bar;
 310     hwaddr modern_addr = QEMU_VIRTIO_PCI_QUEUE_MEM_MULT *
 311                          virtio_get_queue_index(vq);
 312     hwaddr legacy_addr = VIRTIO_PCI_QUEUE_NOTIFY;
 313
 314     if (assign) {
 315         if (modern) {
 316             if (fast_mmio) {
 317                 memory_region_add_eventfd(modern_mr, modern_addr, 0,
 318                                           false, n, notifier);
 319             } else {
 320                 memory_region_add_eventfd(modern_mr, modern_addr, 2,
 321                                           false, n, notifier);
 322             }
 323             if (modern_pio) {
 324                 memory_region_add_eventfd(modern_notify_mr, 0, 2,
 325                                               true, n, notifier);
 326             }
 327         }
 328         if (legacy) {
 329             memory_region_add_eventfd(legacy_mr, legacy_addr, 2,
 330                                       true, n, notifier);
 331         }
 332     } else {
 333         if (modern) {
 334             if (fast_mmio) {
 335                 memory_region_del_eventfd(modern_mr, modern_addr, 0,
 336                                           false, n, notifier);
 337             } else {
 338                 memory_region_del_eventfd(modern_mr, modern_addr, 2,
 339                                           false, n, notifier);
 340             }
 341             if (modern_pio) {
 342                 memory_region_del_eventfd(modern_notify_mr, 0, 2,
 343                                           true, n, notifier);
 344             }
 345         }
 346         if (legacy) {
 347             memory_region_del_eventfd(legacy_mr, legacy_addr, 2,
 348                                       true, n, notifier);
 349         }
 350     }
 351     return 0;
 352 }
 353
 354 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
 355 {
 356     virtio_bus_start_ioeventfd(&proxy->bus);
 357 }
 358
 359 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
 360 {
 361     virtio_bus_stop_ioeventfd(&proxy->bus);
 362 }
 363
 364 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 365 {
 366     VirtIOPCIProxy *proxy = opaque;
 367     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 368     hwaddr pa;
 369
 370     switch (addr) {
 371     case VIRTIO_PCI_GUEST_FEATURES:
 372         /* Guest does not negotiate properly?  We have to assume nothing. */
 373         if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
 374             val = virtio_bus_get_vdev_bad_features(&proxy->bus);
 375         }
 376         virtio_set_features(vdev, val);
 377         break;
 378     case VIRTIO_PCI_QUEUE_PFN:
 379         pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 380         if (pa == 0) {
 381             virtio_pci_reset(DEVICE(proxy));
 382         }
 383         else
 384             virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
 385         break;
 386     case VIRTIO_PCI_QUEUE_SEL:
 387         if (val < VIRTIO_QUEUE_MAX)
 388             vdev->queue_sel = val;
 389         break;
 390     case VIRTIO_PCI_QUEUE_NOTIFY:
 391         if (val < VIRTIO_QUEUE_MAX) {
 392             virtio_queue_notify(vdev, val);
 393         }
 394         break;
 395     case VIRTIO_PCI_STATUS:
 396         if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
 397             virtio_pci_stop_ioeventfd(proxy);
 398         }
 399
 400         virtio_set_status(vdev, val & 0xFF);
 401
 402         if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
 403             virtio_pci_start_ioeventfd(proxy);
 404         }
 405
 406         if (vdev->status == 0) {
 407             virtio_pci_reset(DEVICE(proxy));
 408         }
 409
 410         /* Linux before 2.6.34 drives the device without enabling
 411            the PCI device bus master bit. Enable it automatically
 412            for the guest. This is a PCI spec violation but so is
 413            initiating DMA with bus master bit clear. */
 414         if (val == (VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER)) {
 415             pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
 416                                      proxy->pci_dev.config[PCI_COMMAND] |
 417                                      PCI_COMMAND_MASTER, 1);
 418         }
 419         break;
 420     case VIRTIO_MSI_CONFIG_VECTOR:
 421         msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
 422         /* Make it possible for guest to discover an error took place. */
 423         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 424             val = VIRTIO_NO_VECTOR;
 425         vdev->config_vector = val;
 426         break;
 427     case VIRTIO_MSI_QUEUE_VECTOR:
 428         msix_vector_unuse(&proxy->pci_dev,
 429                           virtio_queue_vector(vdev, vdev->queue_sel));
 430         /* Make it possible for guest to discover an error took place. */
 431         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 432             val = VIRTIO_NO_VECTOR;
 433         virtio_queue_set_vector(vdev, vdev->queue_sel, val);
 434         break;
 435     default:
 436         error_report("%s: unexpected address 0x%x value 0x%x",
 437                      __func__, addr, val);
 438         break;
 439     }
 440 }
 441
 442 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
 443 {
 444     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 445     uint32_t ret = 0xFFFFFFFF;
 446
 447     switch (addr) {
 448     case VIRTIO_PCI_HOST_FEATURES:
 449         ret = vdev->host_features;
 450         break;
 451     case VIRTIO_PCI_GUEST_FEATURES:
 452         ret = vdev->guest_features;
 453         break;
 454     case VIRTIO_PCI_QUEUE_PFN:
 455         ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
 456               >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 457         break;
 458     case VIRTIO_PCI_QUEUE_NUM:
 459         ret = virtio_queue_get_num(vdev, vdev->queue_sel);
 460         break;
 461     case VIRTIO_PCI_QUEUE_SEL:
 462         ret = vdev->queue_sel;
 463         break;
 464     case VIRTIO_PCI_STATUS:
 465         ret = vdev->status;
 466         break;
 467     case VIRTIO_PCI_ISR:
 468         /* reading from the ISR also clears it. */
 469         ret = vdev->isr;
 470         vdev->isr = 0;
 471         pci_irq_deassert(&proxy->pci_dev);
 472         break;
 473     case VIRTIO_MSI_CONFIG_VECTOR:
 474         ret = vdev->config_vector;
 475         break;
 476     case VIRTIO_MSI_QUEUE_VECTOR:
 477         ret = virtio_queue_vector(vdev, vdev->queue_sel);
 478         break;
 479     default:
 480         break;
 481     }
 482
 483     return ret;
 484 }
 485
 486 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr,
 487                                        unsigned size)
 488 {
 489     VirtIOPCIProxy *proxy = opaque;
 490     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 491     uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev);
 492     uint64_t val = 0;
 493     if (addr < config) {
 494         return virtio_ioport_read(proxy, addr);
 495     }
 496     addr -= config;
 497
 498     switch (size) {
 499     case 1:
 500         val = virtio_config_readb(vdev, addr);
 501         break;
 502     case 2:
 503         val = virtio_config_readw(vdev, addr);
 504         if (virtio_is_big_endian(vdev)) {
 505             val = bswap16(val);
 506         }
 507         break;
 508     case 4:
 509         val = virtio_config_readl(vdev, addr);
 510         if (virtio_is_big_endian(vdev)) {
 511             val = bswap32(val);
 512         }
 513         break;
 514     }
 515     return val;
 516 }
 517
 518 static void virtio_pci_config_write(void *opaque, hwaddr addr,
 519                                     uint64_t val, unsigned size)
 520 {
 521     VirtIOPCIProxy *proxy = opaque;
 522     uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev);
 523     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 524     if (addr < config) {
 525         virtio_ioport_write(proxy, addr, val);
 526         return;
 527     }
 528     addr -= config;
 529     /*
 530      * Virtio-PCI is odd. Ioports are LE but config space is target native
 531      * endian.
 532      */
 533     switch (size) {
 534     case 1:
 535         virtio_config_writeb(vdev, addr, val);
 536         break;
 537     case 2:
 538         if (virtio_is_big_endian(vdev)) {
 539             val = bswap16(val);
 540         }
 541         virtio_config_writew(vdev, addr, val);
 542         break;
 543     case 4:
 544         if (virtio_is_big_endian(vdev)) {
 545             val = bswap32(val);
 546         }
 547         virtio_config_writel(vdev, addr, val);
 548         break;
 549     }
 550 }
 551
 552 static const MemoryRegionOps virtio_pci_config_ops = {
 553     .read = virtio_pci_config_read,
 554     .write = virtio_pci_config_write,
 555     .impl = {
 556         .min_access_size = 1,
 557         .max_access_size = 4,
 558     },
 559     .endianness = DEVICE_LITTLE_ENDIAN,
 560 };
 561
 562 /* Below are generic functions to do memcpy from/to an address space,
 563  * without byteswaps, with input validation.
 564  *
 565  * As regular address_space_* APIs all do some kind of byteswap at least for
 566  * some host/target combinations, we are forced to explicitly convert to a
 567  * known-endianness integer value.
 568  * It doesn't really matter which endian format to go through, so the code
 569  * below selects the endian that causes the least amount of work on the given
 570  * host.
 571  *
 572  * Note: host pointer must be aligned.
 573  */
 574 static
 575 void virtio_address_space_write(AddressSpace *as, hwaddr addr,
 576                                 const uint8_t *buf, int len)
 577 {
 578     uint32_t val;
 579
 580     /* address_space_* APIs assume an aligned address.
 581      * As address is under guest control, handle illegal values.
 582      */
 583     addr &= ~(len - 1);
 584
 585     /* Make sure caller aligned buf properly */
 586     assert(!(((uintptr_t)buf) & (len - 1)));
 587
 588     switch (len) {
 589     case 1:
 590         val = pci_get_byte(buf);
 591         address_space_stb(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL);
 592         break;
 593     case 2:
 594         val = pci_get_word(buf);
 595         address_space_stw_le(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL);
 596         break;
 597     case 4:
 598         val = pci_get_long(buf);
 599         address_space_stl_le(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL);
 600         break;
 601     default:
 602         /* As length is under guest control, handle illegal values. */
 603         break;
 604     }
 605 }
 606
 607 static void
 608 virtio_address_space_read(AddressSpace *as, hwaddr addr, uint8_t *buf, int len)
 609 {
 610     uint32_t val;
 611
 612     /* address_space_* APIs assume an aligned address.
 613      * As address is under guest control, handle illegal values.
 614      */
 615     addr &= ~(len - 1);
 616
 617     /* Make sure caller aligned buf properly */
 618     assert(!(((uintptr_t)buf) & (len - 1)));
 619
 620     switch (len) {
 621     case 1:
 622         val = address_space_ldub(as, addr, MEMTXATTRS_UNSPECIFIED, NULL);
 623         pci_set_byte(buf, val);
 624         break;
 625     case 2:
 626         val = address_space_lduw_le(as, addr, MEMTXATTRS_UNSPECIFIED, NULL);
 627         pci_set_word(buf, val);
 628         break;
 629     case 4:
 630         val = address_space_ldl_le(as, addr, MEMTXATTRS_UNSPECIFIED, NULL);
 631         pci_set_long(buf, val);
 632         break;
 633     default:
 634         /* As length is under guest control, handle illegal values. */
 635         break;
 636     }
 637 }
 638
 639 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
 640                                 uint32_t val, int len)
 641 {
 642     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 643     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 644     struct virtio_pci_cfg_cap *cfg;
 645
 646     pci_default_write_config(pci_dev, address, val, len);
 647
 648     if (range_covers_byte(address, len, PCI_COMMAND) &&
 649         !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 650         virtio_pci_stop_ioeventfd(proxy);
 651         virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
 652     }
 653
 654     if (proxy->config_cap &&
 655         ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap,
 656                                                                   pci_cfg_data),
 657                        sizeof cfg->pci_cfg_data)) {
 658         uint32_t off;
 659         uint32_t len;
 660
 661         cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
 662         off = le32_to_cpu(cfg->cap.offset);
 663         len = le32_to_cpu(cfg->cap.length);
 664
 665         if (len == 1 || len == 2 || len == 4) {
 666             assert(len <= sizeof cfg->pci_cfg_data);
 667             virtio_address_space_write(&proxy->modern_as, off,
 668                                        cfg->pci_cfg_data, len);
 669         }
 670     }
 671 }
 672
 673 static uint32_t virtio_read_config(PCIDevice *pci_dev,
 674                                    uint32_t address, int len)
 675 {
 676     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 677     struct virtio_pci_cfg_cap *cfg;
 678
 679     if (proxy->config_cap &&
 680         ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap,
 681                                                                   pci_cfg_data),
 682                        sizeof cfg->pci_cfg_data)) {
 683         uint32_t off;
 684         uint32_t len;
 685
 686         cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
 687         off = le32_to_cpu(cfg->cap.offset);
 688         len = le32_to_cpu(cfg->cap.length);
 689
 690         if (len == 1 || len == 2 || len == 4) {
 691             assert(len <= sizeof cfg->pci_cfg_data);
 692             virtio_address_space_read(&proxy->modern_as, off,
 693                                       cfg->pci_cfg_data, len);
 694         }
 695     }
 696
 697     return pci_default_read_config(pci_dev, address, len);
 698 }
 699
 700 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
 701                                         unsigned int queue_no,
 702                                         unsigned int vector)
 703 {
 704     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 705     int ret;
 706
 707     if (irqfd->users == 0) {
 708         ret = kvm_irqchip_add_msi_route(kvm_state, vector, &proxy->pci_dev);
 709         if (ret < 0) {
 710             return ret;
 711         }
 712         irqfd->virq = ret;
 713     }
 714     irqfd->users++;
 715     return 0;
 716 }
 717
 718 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy,
 719                                              unsigned int vector)
 720 {
 721     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 722     if (--irqfd->users == 0) {
 723         kvm_irqchip_release_virq(kvm_state, irqfd->virq);
 724     }
 725 }
 726
 727 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy,
 728                                  unsigned int queue_no,
 729                                  unsigned int vector)
 730 {
 731     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 732     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 733     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 734     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 735     return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, NULL, irqfd->virq);
 736 }
 737
 738 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
 739                                       unsigned int queue_no,
 740                                       unsigned int vector)
 741 {
 742     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 743     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 744     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 745     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 746     int ret;
 747
 748     ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, n, irqfd->virq);
 749     assert(ret == 0);
 750 }
 751
 752 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
 753 {
 754     PCIDevice *dev = &proxy->pci_dev;
 755     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 756     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 757     unsigned int vector;
 758     int ret, queue_no;
 759
 760     for (queue_no = 0; queue_no < nvqs; queue_no++) {
 761         if (!virtio_queue_get_num(vdev, queue_no)) {
 762             break;
 763         }
 764         vector = virtio_queue_vector(vdev, queue_no);
 765         if (vector >= msix_nr_vectors_allocated(dev)) {
 766             continue;
 767         }
 768         ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector);
 769         if (ret < 0) {
 770             goto undo;
 771         }
 772         /* If guest supports masking, set up irqfd now.
 773          * Otherwise, delay until unmasked in the frontend.
 774          */
 775         if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
 776             ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
 777             if (ret < 0) {
 778                 kvm_virtio_pci_vq_vector_release(proxy, vector);
 779                 goto undo;
 780             }
 781         }
 782     }
 783     return 0;
 784
 785 undo:
 786     while (--queue_no >= 0) {
 787         vector = virtio_queue_vector(vdev, queue_no);
 788         if (vector >= msix_nr_vectors_allocated(dev)) {
 789             continue;
 790         }
 791         if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
 792             kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 793         }
 794         kvm_virtio_pci_vq_vector_release(proxy, vector);
 795     }
 796     return ret;
 797 }
 798
 799 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
 800 {
 801     PCIDevice *dev = &proxy->pci_dev;
 802     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 803     unsigned int vector;
 804     int queue_no;
 805     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 806
 807     for (queue_no = 0; queue_no < nvqs; queue_no++) {
 808         if (!virtio_queue_get_num(vdev, queue_no)) {
 809             break;
 810         }
 811         vector = virtio_queue_vector(vdev, queue_no);
 812         if (vector >= msix_nr_vectors_allocated(dev)) {
 813             continue;
 814         }
 815         /* If guest supports masking, clean up irqfd now.
 816          * Otherwise, it was cleaned when masked in the frontend.
 817          */
 818         if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
 819             kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 820         }
 821         kvm_virtio_pci_vq_vector_release(proxy, vector);
 822     }
 823 }
 824
 825 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
 826                                        unsigned int queue_no,
 827                                        unsigned int vector,
 828                                        MSIMessage msg)
 829 {
 830     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 831     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 832     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 833     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 834     VirtIOIRQFD *irqfd;
 835     int ret = 0;
 836
 837     if (proxy->vector_irqfd) {
 838         irqfd = &proxy->vector_irqfd[vector];
 839         if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) {
 840             ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg,
 841                                                &proxy->pci_dev);
 842             if (ret < 0) {
 843                 return ret;
 844             }
 845         }
 846     }
 847
 848     /* If guest supports masking, irqfd is already setup, unmask it.
 849      * Otherwise, set it up now.
 850      */
 851     if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
 852         k->guest_notifier_mask(vdev, queue_no, false);
 853         /* Test after unmasking to avoid losing events. */
 854         if (k->guest_notifier_pending &&
 855             k->guest_notifier_pending(vdev, queue_no)) {
 856             event_notifier_set(n);
 857         }
 858     } else {
 859         ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
 860     }
 861     return ret;
 862 }
 863
 864 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy,
 865                                              unsigned int queue_no,
 866                                              unsigned int vector)
 867 {
 868     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 869     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 870
 871     /* If guest supports masking, keep irqfd but mask it.
 872      * Otherwise, clean it up now.
 873      */
 874     if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
 875         k->guest_notifier_mask(vdev, queue_no, true);
 876     } else {
 877         kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 878     }
 879 }
 880
 881 static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
 882                                     MSIMessage msg)
 883 {
 884     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 885     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 886     VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
 887     int ret, index, unmasked = 0;
 888
 889     while (vq) {
 890         index = virtio_get_queue_index(vq);
 891         if (!virtio_queue_get_num(vdev, index)) {
 892             break;
 893         }
 894         if (index < proxy->nvqs_with_notifiers) {
 895             ret = virtio_pci_vq_vector_unmask(proxy, index, vector, msg);
 896             if (ret < 0) {
 897                 goto undo;
 898             }
 899             ++unmasked;
 900         }
 901         vq = virtio_vector_next_queue(vq);
 902     }
 903
 904     return 0;
 905
 906 undo:
 907     vq = virtio_vector_first_queue(vdev, vector);
 908     while (vq && unmasked >= 0) {
 909         index = virtio_get_queue_index(vq);
 910         if (index < proxy->nvqs_with_notifiers) {
 911             virtio_pci_vq_vector_mask(proxy, index, vector);
 912             --unmasked;
 913         }
 914         vq = virtio_vector_next_queue(vq);
 915     }
 916     return ret;
 917 }
 918
 919 static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
 920 {
 921     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 922     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 923     VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
 924     int index;
 925
 926     while (vq) {
 927         index = virtio_get_queue_index(vq);
 928         if (!virtio_queue_get_num(vdev, index)) {
 929             break;
 930         }
 931         if (index < proxy->nvqs_with_notifiers) {
 932             virtio_pci_vq_vector_mask(proxy, index, vector);
 933         }
 934         vq = virtio_vector_next_queue(vq);
 935     }
 936 }
 937
 938 static void virtio_pci_vector_poll(PCIDevice *dev,
 939                                    unsigned int vector_start,
 940                                    unsigned int vector_end)
 941 {
 942     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 943     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 944     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 945     int queue_no;
 946     unsigned int vector;
 947     EventNotifier *notifier;
 948     VirtQueue *vq;
 949
 950     for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
 951         if (!virtio_queue_get_num(vdev, queue_no)) {
 952             break;
 953         }
 954         vector = virtio_queue_vector(vdev, queue_no);
 955         if (vector < vector_start || vector >= vector_end ||
 956             !msix_is_masked(dev, vector)) {
 957             continue;
 958         }
 959         vq = virtio_get_queue(vdev, queue_no);
 960         notifier = virtio_queue_get_guest_notifier(vq);
 961         if (k->guest_notifier_pending) {
 962             if (k->guest_notifier_pending(vdev, queue_no)) {
 963                 msix_set_pending(dev, vector);
 964             }
 965         } else if (event_notifier_test_and_clear(notifier)) {
 966             msix_set_pending(dev, vector);
 967         }
 968     }
 969 }
 970
 971 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
 972                                          bool with_irqfd)
 973 {
 974     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 975     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 976     VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
 977     VirtQueue *vq = virtio_get_queue(vdev, n);
 978     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 979
 980     if (assign) {
 981         int r = event_notifier_init(notifier, 0);
 982         if (r < 0) {
 983             return r;
 984         }
 985         virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
 986     } else {
 987         virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
 988         event_notifier_cleanup(notifier);
 989     }
 990
 991     if (!msix_enabled(&proxy->pci_dev) &&
 992         vdev->use_guest_notifier_mask &&
 993         vdc->guest_notifier_mask) {
 994         vdc->guest_notifier_mask(vdev, n, !assign);
 995     }
 996
 997     return 0;
 998 }
 999
1000 static bool virtio_pci_query_guest_notifiers(DeviceState *d)
1001 {
1002     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
1003     return msix_enabled(&proxy->pci_dev);
1004 }
1005
1006 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
1007 {
1008     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
1009     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1010     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
1011     int r, n;
1012     bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
1013         kvm_msi_via_irqfd_enabled();
1014
1015     nvqs = MIN(nvqs, VIRTIO_QUEUE_MAX);
1016
1017     /* When deassigning, pass a consistent nvqs value
1018      * to avoid leaking notifiers.
1019      */
1020     assert(assign || nvqs == proxy->nvqs_with_notifiers);
1021
1022     proxy->nvqs_with_notifiers = nvqs;
1023
1024     /* Must unset vector notifier while guest notifier is still assigned */
1025     if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) {
1026         msix_unset_vector_notifiers(&proxy->pci_dev);
1027         if (proxy->vector_irqfd) {
1028             kvm_virtio_pci_vector_release(proxy, nvqs);
1029             g_free(proxy->vector_irqfd);
1030             proxy->vector_irqfd = NULL;
1031         }
1032     }
1033
1034     for (n = 0; n < nvqs; n++) {
1035         if (!virtio_queue_get_num(vdev, n)) {
1036             break;
1037         }
1038
1039         r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd);
1040         if (r < 0) {
1041             goto assign_error;
1042         }
1043     }
1044
1045     /* Must set vector notifier after guest notifier has been assigned */
1046     if ((with_irqfd || k->guest_notifier_mask) && assign) {
1047         if (with_irqfd) {
1048             proxy->vector_irqfd =
1049                 g_malloc0(sizeof(*proxy->vector_irqfd) *
1050                           msix_nr_vectors_allocated(&proxy->pci_dev));
1051             r = kvm_virtio_pci_vector_use(proxy, nvqs);
1052             if (r < 0) {
1053                 goto assign_error;
1054             }
1055         }
1056         r = msix_set_vector_notifiers(&proxy->pci_dev,
1057                                       virtio_pci_vector_unmask,
1058                                       virtio_pci_vector_mask,
1059                                       virtio_pci_vector_poll);
1060         if (r < 0) {
1061             goto notifiers_error;
1062         }
1063     }
1064
1065     return 0;
1066
1067 notifiers_error:
1068     if (with_irqfd) {
1069         assert(assign);
1070         kvm_virtio_pci_vector_release(proxy, nvqs);
1071     }
1072
1073 assign_error:
1074     /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
1075     assert(assign);
1076     while (--n >= 0) {
1077         virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd);
1078     }
1079     return r;
1080 }
1081
1082 static void virtio_pci_vmstate_change(DeviceState *d, bool running)
1083 {
1084     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
1085     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1086
1087     if (running) {
1088         /* Old QEMU versions did not set bus master enable on status write.
1089          * Detect DRIVER set and enable it.
1090          */
1091         if ((proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION) &&
1092             (vdev->status & VIRTIO_CONFIG_S_DRIVER) &&
1093             !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
1094             pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
1095                                      proxy->pci_dev.config[PCI_COMMAND] |
1096                                      PCI_COMMAND_MASTER, 1);
1097         }
1098         virtio_pci_start_ioeventfd(proxy);
1099     } else {
1100         virtio_pci_stop_ioeventfd(proxy);
1101     }
1102 }
1103
1104 #ifdef CONFIG_VIRTFS
1105 static void virtio_9p_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
1106 {
1107     V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev);
1108     DeviceState *vdev = DEVICE(&dev->vdev);
1109
1110     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1111     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
1112 }
1113
1114 static Property virtio_9p_pci_properties[] = {
1115     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1116                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1117     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1118     DEFINE_PROP_END_OF_LIST(),
1119 };
1120
1121 static void virtio_9p_pci_class_init(ObjectClass *klass, void *data)
1122 {
1123     DeviceClass *dc = DEVICE_CLASS(klass);
1124     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1125     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1126
1127     k->realize = virtio_9p_pci_realize;
1128     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1129     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P;
1130     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1131     pcidev_k->class_id = 0x2;
1132     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1133     dc->props = virtio_9p_pci_properties;
1134 }
1135
1136 static void virtio_9p_pci_instance_init(Object *obj)
1137 {
1138     V9fsPCIState *dev = VIRTIO_9P_PCI(obj);
1139
1140     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1141                                 TYPE_VIRTIO_9P);
1142 }
1143
1144 static const TypeInfo virtio_9p_pci_info = {
1145     .name          = TYPE_VIRTIO_9P_PCI,
1146     .parent        = TYPE_VIRTIO_PCI,
1147     .instance_size = sizeof(V9fsPCIState),
1148     .instance_init = virtio_9p_pci_instance_init,
1149     .class_init    = virtio_9p_pci_class_init,
1150 };
1151 #endif /* CONFIG_VIRTFS */
1152
1153 /*
1154  * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
1155  */
1156
1157 static int virtio_pci_query_nvectors(DeviceState *d)
1158 {
1159     VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1160
1161     return proxy->nvectors;
1162 }
1163
1164 static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy,
1165                                    struct virtio_pci_cap *cap)
1166 {
1167     PCIDevice *dev = &proxy->pci_dev;
1168     int offset;
1169
1170     offset = pci_add_capability(dev, PCI_CAP_ID_VNDR, 0, cap->cap_len);
1171     assert(offset > 0);
1172
1173     assert(cap->cap_len >= sizeof *cap);
1174     memcpy(dev->config + offset + PCI_CAP_FLAGS, &cap->cap_len,
1175            cap->cap_len - PCI_CAP_FLAGS);
1176
1177     return offset;
1178 }
1179
1180 static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr,
1181                                        unsigned size)
1182 {
1183     VirtIOPCIProxy *proxy = opaque;
1184     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1185     uint32_t val = 0;
1186     int i;
1187
1188     switch (addr) {
1189     case VIRTIO_PCI_COMMON_DFSELECT:
1190         val = proxy->dfselect;
1191         break;
1192     case VIRTIO_PCI_COMMON_DF:
1193         if (proxy->dfselect <= 1) {
1194             val = (vdev->host_features & ~VIRTIO_LEGACY_FEATURES) >>
1195                 (32 * proxy->dfselect);
1196         }
1197         break;
1198     case VIRTIO_PCI_COMMON_GFSELECT:
1199         val = proxy->gfselect;
1200         break;
1201     case VIRTIO_PCI_COMMON_GF:
1202         if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
1203             val = proxy->guest_features[proxy->gfselect];
1204         }
1205         break;
1206     case VIRTIO_PCI_COMMON_MSIX:
1207         val = vdev->config_vector;
1208         break;
1209     case VIRTIO_PCI_COMMON_NUMQ:
1210         for (i = 0; i < VIRTIO_QUEUE_MAX; ++i) {
1211             if (virtio_queue_get_num(vdev, i)) {
1212                 val = i + 1;
1213             }
1214         }
1215         break;
1216     case VIRTIO_PCI_COMMON_STATUS:
1217         val = vdev->status;
1218         break;
1219     case VIRTIO_PCI_COMMON_CFGGENERATION:
1220         val = vdev->generation;
1221         break;
1222     case VIRTIO_PCI_COMMON_Q_SELECT:
1223         val = vdev->queue_sel;
1224         break;
1225     case VIRTIO_PCI_COMMON_Q_SIZE:
1226         val = virtio_queue_get_num(vdev, vdev->queue_sel);
1227         break;
1228     case VIRTIO_PCI_COMMON_Q_MSIX:
1229         val = virtio_queue_vector(vdev, vdev->queue_sel);
1230         break;
1231     case VIRTIO_PCI_COMMON_Q_ENABLE:
1232         val = proxy->vqs[vdev->queue_sel].enabled;
1233         break;
1234     case VIRTIO_PCI_COMMON_Q_NOFF:
1235         /* Simply map queues in order */
1236         val = vdev->queue_sel;
1237         break;
1238     case VIRTIO_PCI_COMMON_Q_DESCLO:
1239         val = proxy->vqs[vdev->queue_sel].desc[0];
1240         break;
1241     case VIRTIO_PCI_COMMON_Q_DESCHI:
1242         val = proxy->vqs[vdev->queue_sel].desc[1];
1243         break;
1244     case VIRTIO_PCI_COMMON_Q_AVAILLO:
1245         val = proxy->vqs[vdev->queue_sel].avail[0];
1246         break;
1247     case VIRTIO_PCI_COMMON_Q_AVAILHI:
1248         val = proxy->vqs[vdev->queue_sel].avail[1];
1249         break;
1250     case VIRTIO_PCI_COMMON_Q_USEDLO:
1251         val = proxy->vqs[vdev->queue_sel].used[0];
1252         break;
1253     case VIRTIO_PCI_COMMON_Q_USEDHI:
1254         val = proxy->vqs[vdev->queue_sel].used[1];
1255         break;
1256     default:
1257         val = 0;
1258     }
1259
1260     return val;
1261 }
1262
1263 static void virtio_pci_common_write(void *opaque, hwaddr addr,
1264                                     uint64_t val, unsigned size)
1265 {
1266     VirtIOPCIProxy *proxy = opaque;
1267     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1268
1269     switch (addr) {
1270     case VIRTIO_PCI_COMMON_DFSELECT:
1271         proxy->dfselect = val;
1272         break;
1273     case VIRTIO_PCI_COMMON_GFSELECT:
1274         proxy->gfselect = val;
1275         break;
1276     case VIRTIO_PCI_COMMON_GF:
1277         if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
1278             proxy->guest_features[proxy->gfselect] = val;
1279             virtio_set_features(vdev,
1280                                 (((uint64_t)proxy->guest_features[1]) << 32) |
1281                                 proxy->guest_features[0]);
1282         }
1283         break;
1284     case VIRTIO_PCI_COMMON_MSIX:
1285         msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
1286         /* Make it possible for guest to discover an error took place. */
1287         if (msix_vector_use(&proxy->pci_dev, val) < 0) {
1288             val = VIRTIO_NO_VECTOR;
1289         }
1290         vdev->config_vector = val;
1291         break;
1292     case VIRTIO_PCI_COMMON_STATUS:
1293         if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
1294             virtio_pci_stop_ioeventfd(proxy);
1295         }
1296
1297         virtio_set_status(vdev, val & 0xFF);
1298
1299         if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
1300             virtio_pci_start_ioeventfd(proxy);
1301         }
1302
1303         if (vdev->status == 0) {
1304             virtio_pci_reset(DEVICE(proxy));
1305         }
1306
1307         break;
1308     case VIRTIO_PCI_COMMON_Q_SELECT:
1309         if (val < VIRTIO_QUEUE_MAX) {
1310             vdev->queue_sel = val;
1311         }
1312         break;
1313     case VIRTIO_PCI_COMMON_Q_SIZE:
1314         proxy->vqs[vdev->queue_sel].num = val;
1315         break;
1316     case VIRTIO_PCI_COMMON_Q_MSIX:
1317         msix_vector_unuse(&proxy->pci_dev,
1318                           virtio_queue_vector(vdev, vdev->queue_sel));
1319         /* Make it possible for guest to discover an error took place. */
1320         if (msix_vector_use(&proxy->pci_dev, val) < 0) {
1321             val = VIRTIO_NO_VECTOR;
1322         }
1323         virtio_queue_set_vector(vdev, vdev->queue_sel, val);
1324         break;
1325     case VIRTIO_PCI_COMMON_Q_ENABLE:
1326         /* TODO: need a way to put num back on reset. */
1327         virtio_queue_set_num(vdev, vdev->queue_sel,
1328                              proxy->vqs[vdev->queue_sel].num);
1329         virtio_queue_set_rings(vdev, vdev->queue_sel,
1330                        ((uint64_t)proxy->vqs[vdev->queue_sel].desc[1]) << 32 |
1331                        proxy->vqs[vdev->queue_sel].desc[0],
1332                        ((uint64_t)proxy->vqs[vdev->queue_sel].avail[1]) << 32 |
1333                        proxy->vqs[vdev->queue_sel].avail[0],
1334                        ((uint64_t)proxy->vqs[vdev->queue_sel].used[1]) << 32 |
1335                        proxy->vqs[vdev->queue_sel].used[0]);
1336         proxy->vqs[vdev->queue_sel].enabled = 1;
1337         break;
1338     case VIRTIO_PCI_COMMON_Q_DESCLO:
1339         proxy->vqs[vdev->queue_sel].desc[0] = val;
1340         break;
1341     case VIRTIO_PCI_COMMON_Q_DESCHI:
1342         proxy->vqs[vdev->queue_sel].desc[1] = val;
1343         break;
1344     case VIRTIO_PCI_COMMON_Q_AVAILLO:
1345         proxy->vqs[vdev->queue_sel].avail[0] = val;
1346         break;
1347     case VIRTIO_PCI_COMMON_Q_AVAILHI:
1348         proxy->vqs[vdev->queue_sel].avail[1] = val;
1349         break;
1350     case VIRTIO_PCI_COMMON_Q_USEDLO:
1351         proxy->vqs[vdev->queue_sel].used[0] = val;
1352         break;
1353     case VIRTIO_PCI_COMMON_Q_USEDHI:
1354         proxy->vqs[vdev->queue_sel].used[1] = val;
1355         break;
1356     default:
1357         break;
1358     }
1359 }
1360
1361
1362 static uint64_t virtio_pci_notify_read(void *opaque, hwaddr addr,
1363                                        unsigned size)
1364 {
1365     return 0;
1366 }
1367
1368 static void virtio_pci_notify_write(void *opaque, hwaddr addr,
1369                                     uint64_t val, unsigned size)
1370 {
1371     VirtIODevice *vdev = opaque;
1372     unsigned queue = addr / QEMU_VIRTIO_PCI_QUEUE_MEM_MULT;
1373
1374     if (queue < VIRTIO_QUEUE_MAX) {
1375         virtio_queue_notify(vdev, queue);
1376     }
1377 }
1378
1379 static void virtio_pci_notify_write_pio(void *opaque, hwaddr addr,
1380                                         uint64_t val, unsigned size)
1381 {
1382     VirtIODevice *vdev = opaque;
1383     unsigned queue = val;
1384
1385     if (queue < VIRTIO_QUEUE_MAX) {
1386         virtio_queue_notify(vdev, queue);
1387     }
1388 }
1389
1390 static uint64_t virtio_pci_isr_read(void *opaque, hwaddr addr,
1391                                     unsigned size)
1392 {
1393     VirtIOPCIProxy *proxy = opaque;
1394     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1395     uint64_t val = vdev->isr;
1396
1397     vdev->isr = 0;
1398     pci_irq_deassert(&proxy->pci_dev);
1399
1400     return val;
1401 }
1402
1403 static void virtio_pci_isr_write(void *opaque, hwaddr addr,
1404                                  uint64_t val, unsigned size)
1405 {
1406 }
1407
1408 static uint64_t virtio_pci_device_read(void *opaque, hwaddr addr,
1409                                        unsigned size)
1410 {
1411     VirtIODevice *vdev = opaque;
1412     uint64_t val = 0;
1413
1414     switch (size) {
1415     case 1:
1416         val = virtio_config_modern_readb(vdev, addr);
1417         break;
1418     case 2:
1419         val = virtio_config_modern_readw(vdev, addr);
1420         break;
1421     case 4:
1422         val = virtio_config_modern_readl(vdev, addr);
1423         break;
1424     }
1425     return val;
1426 }
1427
1428 static void virtio_pci_device_write(void *opaque, hwaddr addr,
1429                                     uint64_t val, unsigned size)
1430 {
1431     VirtIODevice *vdev = opaque;
1432     switch (size) {
1433     case 1:
1434         virtio_config_modern_writeb(vdev, addr, val);
1435         break;
1436     case 2:
1437         virtio_config_modern_writew(vdev, addr, val);
1438         break;
1439     case 4:
1440         virtio_config_modern_writel(vdev, addr, val);
1441         break;
1442     }
1443 }
1444
1445 static void virtio_pci_modern_regions_init(VirtIOPCIProxy *proxy)
1446 {
1447     static const MemoryRegionOps common_ops = {
1448         .read = virtio_pci_common_read,
1449         .write = virtio_pci_common_write,
1450         .impl = {
1451             .min_access_size = 1,
1452             .max_access_size = 4,
1453         },
1454         .endianness = DEVICE_LITTLE_ENDIAN,
1455     };
1456     static const MemoryRegionOps isr_ops = {
1457         .read = virtio_pci_isr_read,
1458         .write = virtio_pci_isr_write,
1459         .impl = {
1460             .min_access_size = 1,
1461             .max_access_size = 4,
1462         },
1463         .endianness = DEVICE_LITTLE_ENDIAN,
1464     };
1465     static const MemoryRegionOps device_ops = {
1466         .read = virtio_pci_device_read,
1467         .write = virtio_pci_device_write,
1468         .impl = {
1469             .min_access_size = 1,
1470             .max_access_size = 4,
1471         },
1472         .endianness = DEVICE_LITTLE_ENDIAN,
1473     };
1474     static const MemoryRegionOps notify_ops = {
1475         .read = virtio_pci_notify_read,
1476         .write = virtio_pci_notify_write,
1477         .impl = {
1478             .min_access_size = 1,
1479             .max_access_size = 4,
1480         },
1481         .endianness = DEVICE_LITTLE_ENDIAN,
1482     };
1483     static const MemoryRegionOps notify_pio_ops = {
1484         .read = virtio_pci_notify_read,
1485         .write = virtio_pci_notify_write_pio,
1486         .impl = {
1487             .min_access_size = 1,
1488             .max_access_size = 4,
1489         },
1490         .endianness = DEVICE_LITTLE_ENDIAN,
1491     };
1492
1493
1494     memory_region_init_io(&proxy->common.mr, OBJECT(proxy),
1495                           &common_ops,
1496                           proxy,
1497                           "virtio-pci-common",
1498                           proxy->common.size);
1499
1500     memory_region_init_io(&proxy->isr.mr, OBJECT(proxy),
1501                           &isr_ops,
1502                           proxy,
1503                           "virtio-pci-isr",
1504                           proxy->isr.size);
1505
1506     memory_region_init_io(&proxy->device.mr, OBJECT(proxy),
1507                           &device_ops,
1508                           virtio_bus_get_device(&proxy->bus),
1509                           "virtio-pci-device",
1510                           proxy->device.size);
1511
1512     memory_region_init_io(&proxy->notify.mr, OBJECT(proxy),
1513                           &notify_ops,
1514                           virtio_bus_get_device(&proxy->bus),
1515                           "virtio-pci-notify",
1516                           proxy->notify.size);
1517
1518     memory_region_init_io(&proxy->notify_pio.mr, OBJECT(proxy),
1519                           &notify_pio_ops,
1520                           virtio_bus_get_device(&proxy->bus),
1521                           "virtio-pci-notify-pio",
1522                           proxy->notify.size);
1523 }
1524
1525 static void virtio_pci_modern_region_map(VirtIOPCIProxy *proxy,
1526                                          VirtIOPCIRegion *region,
1527                                          struct virtio_pci_cap *cap,
1528                                          MemoryRegion *mr,
1529                                          uint8_t bar)
1530 {
1531     memory_region_add_subregion(mr, region->offset, &region->mr);
1532
1533     cap->cfg_type = region->type;
1534     cap->bar = bar;
1535     cap->offset = cpu_to_le32(region->offset);
1536     cap->length = cpu_to_le32(region->size);
1537     virtio_pci_add_mem_cap(proxy, cap);
1538
1539 }
1540
1541 static void virtio_pci_modern_mem_region_map(VirtIOPCIProxy *proxy,
1542                                              VirtIOPCIRegion *region,
1543                                              struct virtio_pci_cap *cap)
1544 {
1545     virtio_pci_modern_region_map(proxy, region, cap,
1546                                  &proxy->modern_bar, proxy->modern_mem_bar);
1547 }
1548
1549 static void virtio_pci_modern_io_region_map(VirtIOPCIProxy *proxy,
1550                                             VirtIOPCIRegion *region,
1551                                             struct virtio_pci_cap *cap)
1552 {
1553     virtio_pci_modern_region_map(proxy, region, cap,
1554                                  &proxy->io_bar, proxy->modern_io_bar);
1555 }
1556
1557 static void virtio_pci_modern_mem_region_unmap(VirtIOPCIProxy *proxy,
1558                                                VirtIOPCIRegion *region)
1559 {
1560     memory_region_del_subregion(&proxy->modern_bar,
1561                                 &region->mr);
1562 }
1563
1564 static void virtio_pci_modern_io_region_unmap(VirtIOPCIProxy *proxy,
1565                                               VirtIOPCIRegion *region)
1566 {
1567     memory_region_del_subregion(&proxy->io_bar,
1568                                 &region->mr);
1569 }
1570
1571 /* This is called by virtio-bus just after the device is plugged. */
1572 static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
1573 {
1574     VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1575     VirtioBusState *bus = &proxy->bus;
1576     bool legacy = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_LEGACY);
1577     bool modern = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_MODERN);
1578     bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
1579     uint8_t *config;
1580     uint32_t size;
1581     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1582
1583     config = proxy->pci_dev.config;
1584     if (proxy->class_code) {
1585         pci_config_set_class(config, proxy->class_code);
1586     }
1587
1588     if (legacy) {
1589         /* legacy and transitional */
1590         pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID,
1591                      pci_get_word(config + PCI_VENDOR_ID));
1592         pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
1593     } else {
1594         /* pure virtio-1.0 */
1595         pci_set_word(config + PCI_VENDOR_ID,
1596                      PCI_VENDOR_ID_REDHAT_QUMRANET);
1597         pci_set_word(config + PCI_DEVICE_ID,
1598                      0x1040 + virtio_bus_get_vdev_id(bus));
1599         pci_config_set_revision(config, 1);
1600     }
1601     config[PCI_INTERRUPT_PIN] = 1;
1602
1603
1604     if (modern) {
1605         struct virtio_pci_cap cap = {
1606             .cap_len = sizeof cap,
1607         };
1608         struct virtio_pci_notify_cap notify = {
1609             .cap.cap_len = sizeof notify,
1610             .notify_off_multiplier =
1611                 cpu_to_le32(QEMU_VIRTIO_PCI_QUEUE_MEM_MULT),
1612         };
1613         struct virtio_pci_cfg_cap cfg = {
1614             .cap.cap_len = sizeof cfg,
1615             .cap.cfg_type = VIRTIO_PCI_CAP_PCI_CFG,
1616         };
1617         struct virtio_pci_notify_cap notify_pio = {
1618             .cap.cap_len = sizeof notify,
1619             .notify_off_multiplier = cpu_to_le32(0x0),
1620         };
1621
1622         struct virtio_pci_cfg_cap *cfg_mask;
1623
1624         virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1625         virtio_pci_modern_regions_init(proxy);
1626
1627         virtio_pci_modern_mem_region_map(proxy, &proxy->common, &cap);
1628         virtio_pci_modern_mem_region_map(proxy, &proxy->isr, &cap);
1629         virtio_pci_modern_mem_region_map(proxy, &proxy->device, &cap);
1630         virtio_pci_modern_mem_region_map(proxy, &proxy->notify, &notify.cap);
1631
1632         if (modern_pio) {
1633             memory_region_init(&proxy->io_bar, OBJECT(proxy),
1634                                "virtio-pci-io", 0x4);
1635
1636             pci_register_bar(&proxy->pci_dev, proxy->modern_io_bar,
1637                              PCI_BASE_ADDRESS_SPACE_IO, &proxy->io_bar);
1638
1639             virtio_pci_modern_io_region_map(proxy, &proxy->notify_pio,
1640                                             &notify_pio.cap);
1641         }
1642
1643         pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar,
1644                          PCI_BASE_ADDRESS_SPACE_MEMORY |
1645                          PCI_BASE_ADDRESS_MEM_PREFETCH |
1646                          PCI_BASE_ADDRESS_MEM_TYPE_64,
1647                          &proxy->modern_bar);
1648
1649         proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap);
1650         cfg_mask = (void *)(proxy->pci_dev.wmask + proxy->config_cap);
1651         pci_set_byte(&cfg_mask->cap.bar, ~0x0);
1652         pci_set_long((uint8_t *)&cfg_mask->cap.offset, ~0x0);
1653         pci_set_long((uint8_t *)&cfg_mask->cap.length, ~0x0);
1654         pci_set_long(cfg_mask->pci_cfg_data, ~0x0);
1655     }
1656
1657     if (proxy->nvectors) {
1658         int err = msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors,
1659                                           proxy->msix_bar);
1660         if (err) {
1661             /* Notice when a system that supports MSIx can't initialize it.  */
1662             if (err != -ENOTSUP) {
1663                 error_report("unable to init msix vectors to %" PRIu32,
1664                              proxy->nvectors);
1665             }
1666             proxy->nvectors = 0;
1667         }
1668     }
1669
1670     proxy->pci_dev.config_write = virtio_write_config;
1671     proxy->pci_dev.config_read = virtio_read_config;
1672
1673     if (legacy) {
1674         size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev)
1675             + virtio_bus_get_vdev_config_len(bus);
1676         size = pow2ceil(size);
1677
1678         memory_region_init_io(&proxy->bar, OBJECT(proxy),
1679                               &virtio_pci_config_ops,
1680                               proxy, "virtio-pci", size);
1681
1682         pci_register_bar(&proxy->pci_dev, proxy->legacy_io_bar,
1683                          PCI_BASE_ADDRESS_SPACE_IO, &proxy->bar);
1684     }
1685
1686     if (!kvm_has_many_ioeventfds()) {
1687         proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
1688     }
1689
1690     virtio_add_feature(&vdev->host_features, VIRTIO_F_BAD_FEATURE);
1691 }
1692
1693 static void virtio_pci_device_unplugged(DeviceState *d)
1694 {
1695     VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1696     bool modern = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_MODERN);
1697     bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
1698
1699     virtio_pci_stop_ioeventfd(proxy);
1700
1701     if (modern) {
1702         virtio_pci_modern_mem_region_unmap(proxy, &proxy->common);
1703         virtio_pci_modern_mem_region_unmap(proxy, &proxy->isr);
1704         virtio_pci_modern_mem_region_unmap(proxy, &proxy->device);
1705         virtio_pci_modern_mem_region_unmap(proxy, &proxy->notify);
1706         if (modern_pio) {
1707             virtio_pci_modern_io_region_unmap(proxy, &proxy->notify_pio);
1708         }
1709     }
1710 }
1711
1712 static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
1713 {
1714     VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
1715     VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev);
1716
1717     /*
1718      * virtio pci bar layout used by default.
1719      * subclasses can re-arrange things if needed.
1720      *
1721      *   region 0   --  virtio legacy io bar
1722      *   region 1   --  msi-x bar
1723      *   region 4+5 --  virtio modern memory (64bit) bar
1724      *
1725      */
1726     proxy->legacy_io_bar  = 0;
1727     proxy->msix_bar       = 1;
1728     proxy->modern_io_bar  = 2;
1729     proxy->modern_mem_bar = 4;
1730
1731     proxy->common.offset = 0x0;
1732     proxy->common.size = 0x1000;
1733     proxy->common.type = VIRTIO_PCI_CAP_COMMON_CFG;
1734
1735     proxy->isr.offset = 0x1000;
1736     proxy->isr.size = 0x1000;
1737     proxy->isr.type = VIRTIO_PCI_CAP_ISR_CFG;
1738
1739     proxy->device.offset = 0x2000;
1740     proxy->device.size = 0x1000;
1741     proxy->device.type = VIRTIO_PCI_CAP_DEVICE_CFG;
1742
1743     proxy->notify.offset = 0x3000;
1744     proxy->notify.size =
1745         QEMU_VIRTIO_PCI_QUEUE_MEM_MULT * VIRTIO_QUEUE_MAX;
1746     proxy->notify.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
1747
1748     proxy->notify_pio.offset = 0x0;
1749     proxy->notify_pio.size = 0x4;
1750     proxy->notify_pio.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
1751
1752     /* subclasses can enforce modern, so do this unconditionally */
1753     memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci",
1754                        2 * QEMU_VIRTIO_PCI_QUEUE_MEM_MULT *
1755                        VIRTIO_QUEUE_MAX);
1756
1757     memory_region_init_alias(&proxy->modern_cfg,
1758                              OBJECT(proxy),
1759                              "virtio-pci-cfg",
1760                              &proxy->modern_bar,
1761                              0,
1762                              memory_region_size(&proxy->modern_bar));
1763
1764     address_space_init(&proxy->modern_as, &proxy->modern_cfg, "virtio-pci-cfg-as");
1765
1766     if (pci_is_express(pci_dev) && pci_bus_is_express(pci_dev->bus) &&
1767         !pci_bus_is_root(pci_dev->bus)) {
1768         int pos;
1769
1770         pos = pcie_endpoint_cap_init(pci_dev, 0);
1771         assert(pos > 0);
1772
1773         pos = pci_add_capability(pci_dev, PCI_CAP_ID_PM, 0, PCI_PM_SIZEOF);
1774         assert(pos > 0);
1775
1776         /*
1777          * Indicates that this function complies with revision 1.2 of the
1778          * PCI Power Management Interface Specification.
1779          */
1780         pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3);
1781     } else {
1782         /*
1783          * make future invocations of pci_is_express() return false
1784          * and pci_config_size() return PCI_CONFIG_SPACE_SIZE.
1785          */
1786         pci_dev->cap_present &= ~QEMU_PCI_CAP_EXPRESS;
1787     }
1788
1789     virtio_pci_bus_new(&proxy->bus, sizeof(proxy->bus), proxy);
1790     if (k->realize) {
1791         k->realize(proxy, errp);
1792     }
1793 }
1794
1795 static void virtio_pci_exit(PCIDevice *pci_dev)
1796 {
1797     VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
1798
1799     msix_uninit_exclusive_bar(pci_dev);
1800     address_space_destroy(&proxy->modern_as);
1801 }
1802
1803 static void virtio_pci_reset(DeviceState *qdev)
1804 {
1805     VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1806     VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
1807     int i;
1808
1809     virtio_pci_stop_ioeventfd(proxy);
1810     virtio_bus_reset(bus);
1811     msix_unuse_all_vectors(&proxy->pci_dev);
1812
1813     for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
1814         proxy->vqs[i].enabled = 0;
1815     }
1816 }
1817
1818 static Property virtio_pci_properties[] = {
1819     DEFINE_PROP_BIT("virtio-pci-bus-master-bug-migration", VirtIOPCIProxy, flags,
1820                     VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT, false),
1821     DEFINE_PROP_BIT("disable-legacy", VirtIOPCIProxy, flags,
1822                     VIRTIO_PCI_FLAG_DISABLE_LEGACY_BIT, false),
1823     DEFINE_PROP_BIT("disable-modern", VirtIOPCIProxy, flags,
1824                     VIRTIO_PCI_FLAG_DISABLE_MODERN_BIT, true),
1825     DEFINE_PROP_BIT("migrate-extra", VirtIOPCIProxy, flags,
1826                     VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT, true),
1827     DEFINE_PROP_BIT("modern-pio-notify", VirtIOPCIProxy, flags,
1828                     VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT, false),
1829     DEFINE_PROP_BIT("x-disable-pcie", VirtIOPCIProxy, flags,
1830                     VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT, false),
1831     DEFINE_PROP_END_OF_LIST(),
1832 };
1833
1834 static void virtio_pci_dc_realize(DeviceState *qdev, Error **errp)
1835 {
1836     VirtioPCIClass *vpciklass = VIRTIO_PCI_GET_CLASS(qdev);
1837     VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1838     PCIDevice *pci_dev = &proxy->pci_dev;
1839
1840     if (!(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_PCIE) &&
1841         !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_MODERN)) {
1842         pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
1843     }
1844
1845     vpciklass->parent_dc_realize(qdev, errp);
1846 }
1847
1848 static void virtio_pci_class_init(ObjectClass *klass, void *data)
1849 {
1850     DeviceClass *dc = DEVICE_CLASS(klass);
1851     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1852     VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
1853
1854     dc->props = virtio_pci_properties;
1855     k->realize = virtio_pci_realize;
1856     k->exit = virtio_pci_exit;
1857     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1858     k->revision = VIRTIO_PCI_ABI_VERSION;
1859     k->class_id = PCI_CLASS_OTHERS;
1860     vpciklass->parent_dc_realize = dc->realize;
1861     dc->realize = virtio_pci_dc_realize;
1862     dc->reset = virtio_pci_reset;
1863 }
1864
1865 static const TypeInfo virtio_pci_info = {
1866     .name          = TYPE_VIRTIO_PCI,
1867     .parent        = TYPE_PCI_DEVICE,
1868     .instance_size = sizeof(VirtIOPCIProxy),
1869     .class_init    = virtio_pci_class_init,
1870     .class_size    = sizeof(VirtioPCIClass),
1871     .abstract      = true,
1872 };
1873
1874 /* virtio-blk-pci */
1875
1876 static Property virtio_blk_pci_properties[] = {
1877     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1878     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1879                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1880     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1881     DEFINE_PROP_END_OF_LIST(),
1882 };
1883
1884 static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
1885 {
1886     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
1887     DeviceState *vdev = DEVICE(&dev->vdev);
1888
1889     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1890     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
1891 }
1892
1893 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
1894 {
1895     DeviceClass *dc = DEVICE_CLASS(klass);
1896     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1897     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1898
1899     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1900     dc->props = virtio_blk_pci_properties;
1901     k->realize = virtio_blk_pci_realize;
1902     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1903     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
1904     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1905     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1906 }
1907
1908 static void virtio_blk_pci_instance_init(Object *obj)
1909 {
1910     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
1911
1912     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1913                                 TYPE_VIRTIO_BLK);
1914     object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread",
1915                               &error_abort);
1916     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
1917                               "bootindex", &error_abort);
1918 }
1919
1920 static const TypeInfo virtio_blk_pci_info = {
1921     .name          = TYPE_VIRTIO_BLK_PCI,
1922     .parent        = TYPE_VIRTIO_PCI,
1923     .instance_size = sizeof(VirtIOBlkPCI),
1924     .instance_init = virtio_blk_pci_instance_init,
1925     .class_init    = virtio_blk_pci_class_init,
1926 };
1927
1928 /* virtio-scsi-pci */
1929
1930 static Property virtio_scsi_pci_properties[] = {
1931     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1932                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1933     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
1934                        DEV_NVECTORS_UNSPECIFIED),
1935     DEFINE_PROP_END_OF_LIST(),
1936 };
1937
1938 static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
1939 {
1940     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
1941     DeviceState *vdev = DEVICE(&dev->vdev);
1942     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
1943     DeviceState *proxy = DEVICE(vpci_dev);
1944     char *bus_name;
1945
1946     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1947         vpci_dev->nvectors = vs->conf.num_queues + 3;
1948     }
1949
1950     /*
1951      * For command line compatibility, this sets the virtio-scsi-device bus
1952      * name as before.
1953      */
1954     if (proxy->id) {
1955         bus_name = g_strdup_printf("%s.0", proxy->id);
1956         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1957         g_free(bus_name);
1958     }
1959
1960     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1961     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
1962 }
1963
1964 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
1965 {
1966     DeviceClass *dc = DEVICE_CLASS(klass);
1967     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1968     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1969
1970     k->realize = virtio_scsi_pci_realize;
1971     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1972     dc->props = virtio_scsi_pci_properties;
1973     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1974     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
1975     pcidev_k->revision = 0x00;
1976     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1977 }
1978
1979 static void virtio_scsi_pci_instance_init(Object *obj)
1980 {
1981     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
1982
1983     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1984                                 TYPE_VIRTIO_SCSI);
1985     object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread",
1986                               &error_abort);
1987 }
1988
1989 static const TypeInfo virtio_scsi_pci_info = {
1990     .name          = TYPE_VIRTIO_SCSI_PCI,
1991     .parent        = TYPE_VIRTIO_PCI,
1992     .instance_size = sizeof(VirtIOSCSIPCI),
1993     .instance_init = virtio_scsi_pci_instance_init,
1994     .class_init    = virtio_scsi_pci_class_init,
1995 };
1996
1997 /* vhost-scsi-pci */
1998
1999 #ifdef CONFIG_VHOST_SCSI
2000 static Property vhost_scsi_pci_properties[] = {
2001     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
2002                        DEV_NVECTORS_UNSPECIFIED),
2003     DEFINE_PROP_END_OF_LIST(),
2004 };
2005
2006 static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2007 {
2008     VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
2009     DeviceState *vdev = DEVICE(&dev->vdev);
2010     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
2011
2012     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2013         vpci_dev->nvectors = vs->conf.num_queues + 3;
2014     }
2015
2016     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2017     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2018 }
2019
2020 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data)
2021 {
2022     DeviceClass *dc = DEVICE_CLASS(klass);
2023     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2024     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2025     k->realize = vhost_scsi_pci_realize;
2026     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2027     dc->props = vhost_scsi_pci_properties;
2028     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2029     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
2030     pcidev_k->revision = 0x00;
2031     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2032 }
2033
2034 static void vhost_scsi_pci_instance_init(Object *obj)
2035 {
2036     VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
2037
2038     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2039                                 TYPE_VHOST_SCSI);
2040     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2041                               "bootindex", &error_abort);
2042 }
2043
2044 static const TypeInfo vhost_scsi_pci_info = {
2045     .name          = TYPE_VHOST_SCSI_PCI,
2046     .parent        = TYPE_VIRTIO_PCI,
2047     .instance_size = sizeof(VHostSCSIPCI),
2048     .instance_init = vhost_scsi_pci_instance_init,
2049     .class_init    = vhost_scsi_pci_class_init,
2050 };
2051 #endif
2052
2053 /* virtio-balloon-pci */
2054
2055 static Property virtio_balloon_pci_properties[] = {
2056     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
2057     DEFINE_PROP_END_OF_LIST(),
2058 };
2059
2060 static void virtio_balloon_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2061 {
2062     VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev);
2063     DeviceState *vdev = DEVICE(&dev->vdev);
2064
2065     if (vpci_dev->class_code != PCI_CLASS_OTHERS &&
2066         vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
2067         vpci_dev->class_code = PCI_CLASS_OTHERS;
2068     }
2069
2070     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2071     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2072 }
2073
2074 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data)
2075 {
2076     DeviceClass *dc = DEVICE_CLASS(klass);
2077     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2078     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2079     k->realize = virtio_balloon_pci_realize;
2080     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
2081     dc->props = virtio_balloon_pci_properties;
2082     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2083     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON;
2084     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2085     pcidev_k->class_id = PCI_CLASS_OTHERS;
2086 }
2087
2088 static void virtio_balloon_pci_instance_init(Object *obj)
2089 {
2090     VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj);
2091
2092     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2093                                 TYPE_VIRTIO_BALLOON);
2094     object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev),
2095                                   "guest-stats", &error_abort);
2096     object_property_add_alias(obj, "guest-stats-polling-interval",
2097                               OBJECT(&dev->vdev),
2098                               "guest-stats-polling-interval", &error_abort);
2099 }
2100
2101 static const TypeInfo virtio_balloon_pci_info = {
2102     .name          = TYPE_VIRTIO_BALLOON_PCI,
2103     .parent        = TYPE_VIRTIO_PCI,
2104     .instance_size = sizeof(VirtIOBalloonPCI),
2105     .instance_init = virtio_balloon_pci_instance_init,
2106     .class_init    = virtio_balloon_pci_class_init,
2107 };
2108
2109 /* virtio-serial-pci */
2110
2111 static void virtio_serial_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2112 {
2113     VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev);
2114     DeviceState *vdev = DEVICE(&dev->vdev);
2115     DeviceState *proxy = DEVICE(vpci_dev);
2116     char *bus_name;
2117
2118     if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
2119         vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
2120         vpci_dev->class_code != PCI_CLASS_OTHERS) {        /* qemu-kvm  */
2121             vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER;
2122     }
2123
2124     /* backwards-compatibility with machines that were created with
2125        DEV_NVECTORS_UNSPECIFIED */
2126     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2127         vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1;
2128     }
2129
2130     /*
2131      * For command line compatibility, this sets the virtio-serial-device bus
2132      * name as before.
2133      */
2134     if (proxy->id) {
2135         bus_name = g_strdup_printf("%s.0", proxy->id);
2136         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
2137         g_free(bus_name);
2138     }
2139
2140     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2141     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2142 }
2143
2144 static Property virtio_serial_pci_properties[] = {
2145     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2146                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
2147     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
2148     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
2149     DEFINE_PROP_END_OF_LIST(),
2150 };
2151
2152 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data)
2153 {
2154     DeviceClass *dc = DEVICE_CLASS(klass);
2155     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2156     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2157     k->realize = virtio_serial_pci_realize;
2158     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
2159     dc->props = virtio_serial_pci_properties;
2160     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2161     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
2162     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2163     pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
2164 }
2165
2166 static void virtio_serial_pci_instance_init(Object *obj)
2167 {
2168     VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj);
2169
2170     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2171                                 TYPE_VIRTIO_SERIAL);
2172 }
2173
2174 static const TypeInfo virtio_serial_pci_info = {
2175     .name          = TYPE_VIRTIO_SERIAL_PCI,
2176     .parent        = TYPE_VIRTIO_PCI,
2177     .instance_size = sizeof(VirtIOSerialPCI),
2178     .instance_init = virtio_serial_pci_instance_init,
2179     .class_init    = virtio_serial_pci_class_init,
2180 };
2181
2182 /* virtio-net-pci */
2183
2184 static Property virtio_net_properties[] = {
2185     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2186                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false),
2187     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
2188     DEFINE_PROP_END_OF_LIST(),
2189 };
2190
2191 static void virtio_net_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2192 {
2193     DeviceState *qdev = DEVICE(vpci_dev);
2194     VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev);
2195     DeviceState *vdev = DEVICE(&dev->vdev);
2196
2197     virtio_net_set_netclient_name(&dev->vdev, qdev->id,
2198                                   object_get_typename(OBJECT(qdev)));
2199     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2200     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2201 }
2202
2203 static void virtio_net_pci_class_init(ObjectClass *klass, void *data)
2204 {
2205     DeviceClass *dc = DEVICE_CLASS(klass);
2206     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
2207     VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
2208
2209     k->romfile = "efi-virtio.rom";
2210     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2211     k->device_id = PCI_DEVICE_ID_VIRTIO_NET;
2212     k->revision = VIRTIO_PCI_ABI_VERSION;
2213     k->class_id = PCI_CLASS_NETWORK_ETHERNET;
2214     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
2215     dc->props = virtio_net_properties;
2216     vpciklass->realize = virtio_net_pci_realize;
2217 }
2218
2219 static void virtio_net_pci_instance_init(Object *obj)
2220 {
2221     VirtIONetPCI *dev = VIRTIO_NET_PCI(obj);
2222
2223     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2224                                 TYPE_VIRTIO_NET);
2225     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2226                               "bootindex", &error_abort);
2227 }
2228
2229 static const TypeInfo virtio_net_pci_info = {
2230     .name          = TYPE_VIRTIO_NET_PCI,
2231     .parent        = TYPE_VIRTIO_PCI,
2232     .instance_size = sizeof(VirtIONetPCI),
2233     .instance_init = virtio_net_pci_instance_init,
2234     .class_init    = virtio_net_pci_class_init,
2235 };
2236
2237 /* virtio-rng-pci */
2238
2239 static void virtio_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2240 {
2241     VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev);
2242     DeviceState *vdev = DEVICE(&vrng->vdev);
2243     Error *err = NULL;
2244
2245     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2246     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
2247     if (err) {
2248         error_propagate(errp, err);
2249         return;
2250     }
2251
2252     object_property_set_link(OBJECT(vrng),
2253                              OBJECT(vrng->vdev.conf.rng), "rng",
2254                              NULL);
2255 }
2256
2257 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data)
2258 {
2259     DeviceClass *dc = DEVICE_CLASS(klass);
2260     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2261     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2262
2263     k->realize = virtio_rng_pci_realize;
2264     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
2265
2266     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2267     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG;
2268     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2269     pcidev_k->class_id = PCI_CLASS_OTHERS;
2270 }
2271
2272 static void virtio_rng_initfn(Object *obj)
2273 {
2274     VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj);
2275
2276     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2277                                 TYPE_VIRTIO_RNG);
2278     object_property_add_alias(obj, "rng", OBJECT(&dev->vdev), "rng",
2279                               &error_abort);
2280 }
2281
2282 static const TypeInfo virtio_rng_pci_info = {
2283     .name          = TYPE_VIRTIO_RNG_PCI,
2284     .parent        = TYPE_VIRTIO_PCI,
2285     .instance_size = sizeof(VirtIORngPCI),
2286     .instance_init = virtio_rng_initfn,
2287     .class_init    = virtio_rng_pci_class_init,
2288 };
2289
2290 /* virtio-input-pci */
2291
2292 static Property virtio_input_pci_properties[] = {
2293     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
2294     DEFINE_PROP_END_OF_LIST(),
2295 };
2296
2297 static void virtio_input_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2298 {
2299     VirtIOInputPCI *vinput = VIRTIO_INPUT_PCI(vpci_dev);
2300     DeviceState *vdev = DEVICE(&vinput->vdev);
2301
2302     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2303     /* force virtio-1.0 */
2304     vpci_dev->flags &= ~VIRTIO_PCI_FLAG_DISABLE_MODERN;
2305     vpci_dev->flags |= VIRTIO_PCI_FLAG_DISABLE_LEGACY;
2306     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2307 }
2308
2309 static void virtio_input_pci_class_init(ObjectClass *klass, void *data)
2310 {
2311     DeviceClass *dc = DEVICE_CLASS(klass);
2312     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2313     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2314
2315     dc->props = virtio_input_pci_properties;
2316     k->realize = virtio_input_pci_realize;
2317     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
2318
2319     pcidev_k->class_id = PCI_CLASS_INPUT_OTHER;
2320 }
2321
2322 static void virtio_input_hid_kbd_pci_class_init(ObjectClass *klass, void *data)
2323 {
2324     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2325
2326     pcidev_k->class_id = PCI_CLASS_INPUT_KEYBOARD;
2327 }
2328
2329 static void virtio_input_hid_mouse_pci_class_init(ObjectClass *klass,
2330                                                   void *data)
2331 {
2332     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2333
2334     pcidev_k->class_id = PCI_CLASS_INPUT_MOUSE;
2335 }
2336
2337 static void virtio_keyboard_initfn(Object *obj)
2338 {
2339     VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2340
2341     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2342                                 TYPE_VIRTIO_KEYBOARD);
2343 }
2344
2345 static void virtio_mouse_initfn(Object *obj)
2346 {
2347     VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2348
2349     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2350                                 TYPE_VIRTIO_MOUSE);
2351 }
2352
2353 static void virtio_tablet_initfn(Object *obj)
2354 {
2355     VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2356
2357     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2358                                 TYPE_VIRTIO_TABLET);
2359 }
2360
2361 static const TypeInfo virtio_input_pci_info = {
2362     .name          = TYPE_VIRTIO_INPUT_PCI,
2363     .parent        = TYPE_VIRTIO_PCI,
2364     .instance_size = sizeof(VirtIOInputPCI),
2365     .class_init    = virtio_input_pci_class_init,
2366     .abstract      = true,
2367 };
2368
2369 static const TypeInfo virtio_input_hid_pci_info = {
2370     .name          = TYPE_VIRTIO_INPUT_HID_PCI,
2371     .parent        = TYPE_VIRTIO_INPUT_PCI,
2372     .instance_size = sizeof(VirtIOInputHIDPCI),
2373     .abstract      = true,
2374 };
2375
2376 static const TypeInfo virtio_keyboard_pci_info = {
2377     .name          = TYPE_VIRTIO_KEYBOARD_PCI,
2378     .parent        = TYPE_VIRTIO_INPUT_HID_PCI,
2379     .class_init    = virtio_input_hid_kbd_pci_class_init,
2380     .instance_size = sizeof(VirtIOInputHIDPCI),
2381     .instance_init = virtio_keyboard_initfn,
2382 };
2383
2384 static const TypeInfo virtio_mouse_pci_info = {
2385     .name          = TYPE_VIRTIO_MOUSE_PCI,
2386     .parent        = TYPE_VIRTIO_INPUT_HID_PCI,
2387     .class_init    = virtio_input_hid_mouse_pci_class_init,
2388     .instance_size = sizeof(VirtIOInputHIDPCI),
2389     .instance_init = virtio_mouse_initfn,
2390 };
2391
2392 static const TypeInfo virtio_tablet_pci_info = {
2393     .name          = TYPE_VIRTIO_TABLET_PCI,
2394     .parent        = TYPE_VIRTIO_INPUT_HID_PCI,
2395     .instance_size = sizeof(VirtIOInputHIDPCI),
2396     .instance_init = virtio_tablet_initfn,
2397 };
2398
2399 #ifdef CONFIG_LINUX
2400 static void virtio_host_initfn(Object *obj)
2401 {
2402     VirtIOInputHostPCI *dev = VIRTIO_INPUT_HOST_PCI(obj);
2403
2404     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2405                                 TYPE_VIRTIO_INPUT_HOST);
2406 }
2407
2408 static const TypeInfo virtio_host_pci_info = {
2409     .name          = TYPE_VIRTIO_INPUT_HOST_PCI,
2410     .parent        = TYPE_VIRTIO_INPUT_PCI,
2411     .instance_size = sizeof(VirtIOInputHostPCI),
2412     .instance_init = virtio_host_initfn,
2413 };
2414 #endif
2415
2416 /* virtio-pci-bus */
2417
2418 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
2419                                VirtIOPCIProxy *dev)
2420 {
2421     DeviceState *qdev = DEVICE(dev);
2422     char virtio_bus_name[] = "virtio-bus";
2423
2424     qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev,
2425                         virtio_bus_name);
2426 }
2427
2428 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
2429 {
2430     BusClass *bus_class = BUS_CLASS(klass);
2431     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
2432     bus_class->max_dev = 1;
2433     k->notify = virtio_pci_notify;
2434     k->save_config = virtio_pci_save_config;
2435     k->load_config = virtio_pci_load_config;
2436     k->save_queue = virtio_pci_save_queue;
2437     k->load_queue = virtio_pci_load_queue;
2438     k->save_extra_state = virtio_pci_save_extra_state;
2439     k->load_extra_state = virtio_pci_load_extra_state;
2440     k->has_extra_state = virtio_pci_has_extra_state;
2441     k->query_guest_notifiers = virtio_pci_query_guest_notifiers;
2442     k->set_guest_notifiers = virtio_pci_set_guest_notifiers;
2443     k->vmstate_change = virtio_pci_vmstate_change;
2444     k->device_plugged = virtio_pci_device_plugged;
2445     k->device_unplugged = virtio_pci_device_unplugged;
2446     k->query_nvectors = virtio_pci_query_nvectors;
2447     k->ioeventfd_started = virtio_pci_ioeventfd_started;
2448     k->ioeventfd_set_started = virtio_pci_ioeventfd_set_started;
2449     k->ioeventfd_disabled = virtio_pci_ioeventfd_disabled;
2450     k->ioeventfd_set_disabled = virtio_pci_ioeventfd_set_disabled;
2451     k->ioeventfd_assign = virtio_pci_ioeventfd_assign;
2452 }
2453
2454 static const TypeInfo virtio_pci_bus_info = {
2455     .name          = TYPE_VIRTIO_PCI_BUS,
2456     .parent        = TYPE_VIRTIO_BUS,
2457     .instance_size = sizeof(VirtioPCIBusState),
2458     .class_init    = virtio_pci_bus_class_init,
2459 };
2460
2461 static void virtio_pci_register_types(void)
2462 {
2463     type_register_static(&virtio_rng_pci_info);
2464     type_register_static(&virtio_input_pci_info);
2465     type_register_static(&virtio_input_hid_pci_info);
2466     type_register_static(&virtio_keyboard_pci_info);
2467     type_register_static(&virtio_mouse_pci_info);
2468     type_register_static(&virtio_tablet_pci_info);
2469 #ifdef CONFIG_LINUX
2470     type_register_static(&virtio_host_pci_info);
2471 #endif
2472     type_register_static(&virtio_pci_bus_info);
2473     type_register_static(&virtio_pci_info);
2474 #ifdef CONFIG_VIRTFS
2475     type_register_static(&virtio_9p_pci_info);
2476 #endif
2477     type_register_static(&virtio_blk_pci_info);
2478     type_register_static(&virtio_scsi_pci_info);
2479     type_register_static(&virtio_balloon_pci_info);
2480     type_register_static(&virtio_serial_pci_info);
2481     type_register_static(&virtio_net_pci_info);
2482 #ifdef CONFIG_VHOST_SCSI
2483     type_register_static(&vhost_scsi_pci_info);
2484 #endif
2485 }
2486
2487 type_init(virtio_pci_register_types)