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 <inttypes.h>
  19
  20 #include "hw/virtio/virtio.h"
  21 #include "hw/virtio/virtio-blk.h"
  22 #include "hw/virtio/virtio-net.h"
  23 #include "hw/virtio/virtio-serial.h"
  24 #include "hw/virtio/virtio-scsi.h"
  25 #include "hw/virtio/virtio-balloon.h"
  26 #include "hw/pci/pci.h"
  27 #include "qemu/error-report.h"
  28 #include "hw/pci/msi.h"
  29 #include "hw/pci/msix.h"
  30 #include "hw/loader.h"
  31 #include "sysemu/kvm.h"
  32 #include "sysemu/blockdev.h"
  33 #include "virtio-pci.h"
  34 #include "qemu/range.h"
  35 #include "hw/virtio/virtio-bus.h"
  36 #include "qapi/visitor.h"
  37
  38 /* from Linux's linux/virtio_pci.h */
  39
  40 /* A 32-bit r/o bitmask of the features supported by the host */
  41 #define VIRTIO_PCI_HOST_FEATURES        0
  42
  43 /* A 32-bit r/w bitmask of features activated by the guest */
  44 #define VIRTIO_PCI_GUEST_FEATURES       4
  45
  46 /* A 32-bit r/w PFN for the currently selected queue */
  47 #define VIRTIO_PCI_QUEUE_PFN            8
  48
  49 /* A 16-bit r/o queue size for the currently selected queue */
  50 #define VIRTIO_PCI_QUEUE_NUM            12
  51
  52 /* A 16-bit r/w queue selector */
  53 #define VIRTIO_PCI_QUEUE_SEL            14
  54
  55 /* A 16-bit r/w queue notifier */
  56 #define VIRTIO_PCI_QUEUE_NOTIFY         16
  57
  58 /* An 8-bit device status register.  */
  59 #define VIRTIO_PCI_STATUS               18
  60
  61 /* An 8-bit r/o interrupt status register.  Reading the value will return the
  62  * current contents of the ISR and will also clear it.  This is effectively
  63  * a read-and-acknowledge. */
  64 #define VIRTIO_PCI_ISR                  19
  65
  66 /* MSI-X registers: only enabled if MSI-X is enabled. */
  67 /* A 16-bit vector for configuration changes. */
  68 #define VIRTIO_MSI_CONFIG_VECTOR        20
  69 /* A 16-bit vector for selected queue notifications. */
  70 #define VIRTIO_MSI_QUEUE_VECTOR         22
  71
  72 /* Config space size */
  73 #define VIRTIO_PCI_CONFIG_NOMSI         20
  74 #define VIRTIO_PCI_CONFIG_MSI           24
  75 #define VIRTIO_PCI_REGION_SIZE(dev)     (msix_present(dev) ? \
  76                                          VIRTIO_PCI_CONFIG_MSI : \
  77                                          VIRTIO_PCI_CONFIG_NOMSI)
  78
  79 /* The remaining space is defined by each driver as the per-driver
  80  * configuration space */
  81 #define VIRTIO_PCI_CONFIG(dev)          (msix_enabled(dev) ? \
  82                                          VIRTIO_PCI_CONFIG_MSI : \
  83                                          VIRTIO_PCI_CONFIG_NOMSI)
  84
  85 /* How many bits to shift physical queue address written to QUEUE_PFN.
  86  * 12 is historical, and due to x86 page size. */
  87 #define VIRTIO_PCI_QUEUE_ADDR_SHIFT    12
  88
  89 /* Flags track per-device state like workarounds for quirks in older guests. */
  90 #define VIRTIO_PCI_FLAG_BUS_MASTER_BUG  (1 << 0)
  91
  92 /* HACK for virtio to determine if it's running a big endian guest */
  93 bool virtio_is_big_endian(void);
  94
  95 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
  96                                VirtIOPCIProxy *dev);
  97
  98 /* virtio device */
  99 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */
 100 static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d)
 101 {
 102     return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
 103 }
 104
 105 /* DeviceState to VirtIOPCIProxy. Note: used on datapath,
 106  * be careful and test performance if you change this.
 107  */
 108 static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d)
 109 {
 110     return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
 111 }
 112
 113 static void virtio_pci_notify(DeviceState *d, uint16_t vector)
 114 {
 115     VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d);
 116
 117     if (msix_enabled(&proxy->pci_dev))
 118         msix_notify(&proxy->pci_dev, vector);
 119     else {
 120         VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 121         pci_set_irq(&proxy->pci_dev, vdev->isr & 1);
 122     }
 123 }
 124
 125 static void virtio_pci_save_config(DeviceState *d, QEMUFile *f)
 126 {
 127     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 128     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 129
 130     pci_device_save(&proxy->pci_dev, f);
 131     msix_save(&proxy->pci_dev, f);
 132     if (msix_present(&proxy->pci_dev))
 133         qemu_put_be16(f, vdev->config_vector);
 134 }
 135
 136 static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f)
 137 {
 138     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 139     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 140
 141     if (msix_present(&proxy->pci_dev))
 142         qemu_put_be16(f, virtio_queue_vector(vdev, n));
 143 }
 144
 145 static int virtio_pci_load_config(DeviceState *d, QEMUFile *f)
 146 {
 147     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 148     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 149
 150     int ret;
 151     ret = pci_device_load(&proxy->pci_dev, f);
 152     if (ret) {
 153         return ret;
 154     }
 155     msix_unuse_all_vectors(&proxy->pci_dev);
 156     msix_load(&proxy->pci_dev, f);
 157     if (msix_present(&proxy->pci_dev)) {
 158         qemu_get_be16s(f, &vdev->config_vector);
 159     } else {
 160         vdev->config_vector = VIRTIO_NO_VECTOR;
 161     }
 162     if (vdev->config_vector != VIRTIO_NO_VECTOR) {
 163         return msix_vector_use(&proxy->pci_dev, vdev->config_vector);
 164     }
 165     return 0;
 166 }
 167
 168 static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f)
 169 {
 170     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 171     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 172
 173     uint16_t vector;
 174     if (msix_present(&proxy->pci_dev)) {
 175         qemu_get_be16s(f, &vector);
 176     } else {
 177         vector = VIRTIO_NO_VECTOR;
 178     }
 179     virtio_queue_set_vector(vdev, n, vector);
 180     if (vector != VIRTIO_NO_VECTOR) {
 181         return msix_vector_use(&proxy->pci_dev, vector);
 182     }
 183     return 0;
 184 }
 185
 186 static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy,
 187                                                  int n, bool assign, bool set_handler)
 188 {
 189     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 190     VirtQueue *vq = virtio_get_queue(vdev, n);
 191     EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
 192     int r = 0;
 193
 194     if (assign) {
 195         r = event_notifier_init(notifier, 1);
 196         if (r < 0) {
 197             error_report("%s: unable to init event notifier: %d",
 198                          __func__, r);
 199             return r;
 200         }
 201         virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
 202         memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
 203                                   true, n, notifier);
 204     } else {
 205         memory_region_del_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
 206                                   true, n, notifier);
 207         virtio_queue_set_host_notifier_fd_handler(vq, false, false);
 208         event_notifier_cleanup(notifier);
 209     }
 210     return r;
 211 }
 212
 213 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
 214 {
 215     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 216     int n, r;
 217
 218     if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) ||
 219         proxy->ioeventfd_disabled ||
 220         proxy->ioeventfd_started) {
 221         return;
 222     }
 223
 224     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 225         if (!virtio_queue_get_num(vdev, n)) {
 226             continue;
 227         }
 228
 229         r = virtio_pci_set_host_notifier_internal(proxy, n, true, true);
 230         if (r < 0) {
 231             goto assign_error;
 232         }
 233     }
 234     proxy->ioeventfd_started = true;
 235     return;
 236
 237 assign_error:
 238     while (--n >= 0) {
 239         if (!virtio_queue_get_num(vdev, n)) {
 240             continue;
 241         }
 242
 243         r = virtio_pci_set_host_notifier_internal(proxy, n, false, false);
 244         assert(r >= 0);
 245     }
 246     proxy->ioeventfd_started = false;
 247     error_report("%s: failed. Fallback to a userspace (slower).", __func__);
 248 }
 249
 250 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
 251 {
 252     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 253     int r;
 254     int n;
 255
 256     if (!proxy->ioeventfd_started) {
 257         return;
 258     }
 259
 260     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 261         if (!virtio_queue_get_num(vdev, n)) {
 262             continue;
 263         }
 264
 265         r = virtio_pci_set_host_notifier_internal(proxy, n, false, false);
 266         assert(r >= 0);
 267     }
 268     proxy->ioeventfd_started = false;
 269 }
 270
 271 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 272 {
 273     VirtIOPCIProxy *proxy = opaque;
 274     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 275     hwaddr pa;
 276
 277     switch (addr) {
 278     case VIRTIO_PCI_GUEST_FEATURES:
 279         /* Guest does not negotiate properly?  We have to assume nothing. */
 280         if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
 281             val = virtio_bus_get_vdev_bad_features(&proxy->bus);
 282         }
 283         virtio_set_features(vdev, val);
 284         break;
 285     case VIRTIO_PCI_QUEUE_PFN:
 286         pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 287         if (pa == 0) {
 288             virtio_pci_stop_ioeventfd(proxy);
 289             virtio_reset(vdev);
 290             msix_unuse_all_vectors(&proxy->pci_dev);
 291         }
 292         else
 293             virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
 294         break;
 295     case VIRTIO_PCI_QUEUE_SEL:
 296         if (val < VIRTIO_PCI_QUEUE_MAX)
 297             vdev->queue_sel = val;
 298         break;
 299     case VIRTIO_PCI_QUEUE_NOTIFY:
 300         if (val < VIRTIO_PCI_QUEUE_MAX) {
 301             virtio_queue_notify(vdev, val);
 302         }
 303         break;
 304     case VIRTIO_PCI_STATUS:
 305         if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
 306             virtio_pci_stop_ioeventfd(proxy);
 307         }
 308
 309         virtio_set_status(vdev, val & 0xFF);
 310
 311         if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
 312             virtio_pci_start_ioeventfd(proxy);
 313         }
 314
 315         if (vdev->status == 0) {
 316             virtio_reset(vdev);
 317             msix_unuse_all_vectors(&proxy->pci_dev);
 318         }
 319
 320         /* Linux before 2.6.34 sets the device as OK without enabling
 321            the PCI device bus master bit. In this case we need to disable
 322            some safety checks. */
 323         if ((val & VIRTIO_CONFIG_S_DRIVER_OK) &&
 324             !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 325             proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
 326         }
 327         break;
 328     case VIRTIO_MSI_CONFIG_VECTOR:
 329         msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
 330         /* Make it possible for guest to discover an error took place. */
 331         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 332             val = VIRTIO_NO_VECTOR;
 333         vdev->config_vector = val;
 334         break;
 335     case VIRTIO_MSI_QUEUE_VECTOR:
 336         msix_vector_unuse(&proxy->pci_dev,
 337                           virtio_queue_vector(vdev, vdev->queue_sel));
 338         /* Make it possible for guest to discover an error took place. */
 339         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 340             val = VIRTIO_NO_VECTOR;
 341         virtio_queue_set_vector(vdev, vdev->queue_sel, val);
 342         break;
 343     default:
 344         error_report("%s: unexpected address 0x%x value 0x%x",
 345                      __func__, addr, val);
 346         break;
 347     }
 348 }
 349
 350 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
 351 {
 352     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 353     uint32_t ret = 0xFFFFFFFF;
 354
 355     switch (addr) {
 356     case VIRTIO_PCI_HOST_FEATURES:
 357         ret = proxy->host_features;
 358         break;
 359     case VIRTIO_PCI_GUEST_FEATURES:
 360         ret = vdev->guest_features;
 361         break;
 362     case VIRTIO_PCI_QUEUE_PFN:
 363         ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
 364               >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 365         break;
 366     case VIRTIO_PCI_QUEUE_NUM:
 367         ret = virtio_queue_get_num(vdev, vdev->queue_sel);
 368         break;
 369     case VIRTIO_PCI_QUEUE_SEL:
 370         ret = vdev->queue_sel;
 371         break;
 372     case VIRTIO_PCI_STATUS:
 373         ret = vdev->status;
 374         break;
 375     case VIRTIO_PCI_ISR:
 376         /* reading from the ISR also clears it. */
 377         ret = vdev->isr;
 378         vdev->isr = 0;
 379         pci_irq_deassert(&proxy->pci_dev);
 380         break;
 381     case VIRTIO_MSI_CONFIG_VECTOR:
 382         ret = vdev->config_vector;
 383         break;
 384     case VIRTIO_MSI_QUEUE_VECTOR:
 385         ret = virtio_queue_vector(vdev, vdev->queue_sel);
 386         break;
 387     default:
 388         break;
 389     }
 390
 391     return ret;
 392 }
 393
 394 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr,
 395                                        unsigned size)
 396 {
 397     VirtIOPCIProxy *proxy = opaque;
 398     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 399     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 400     uint64_t val = 0;
 401     if (addr < config) {
 402         return virtio_ioport_read(proxy, addr);
 403     }
 404     addr -= config;
 405
 406     switch (size) {
 407     case 1:
 408         val = virtio_config_readb(vdev, addr);
 409         break;
 410     case 2:
 411         val = virtio_config_readw(vdev, addr);
 412         if (virtio_is_big_endian()) {
 413             val = bswap16(val);
 414         }
 415         break;
 416     case 4:
 417         val = virtio_config_readl(vdev, addr);
 418         if (virtio_is_big_endian()) {
 419             val = bswap32(val);
 420         }
 421         break;
 422     }
 423     return val;
 424 }
 425
 426 static void virtio_pci_config_write(void *opaque, hwaddr addr,
 427                                     uint64_t val, unsigned size)
 428 {
 429     VirtIOPCIProxy *proxy = opaque;
 430     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 431     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 432     if (addr < config) {
 433         virtio_ioport_write(proxy, addr, val);
 434         return;
 435     }
 436     addr -= config;
 437     /*
 438      * Virtio-PCI is odd. Ioports are LE but config space is target native
 439      * endian.
 440      */
 441     switch (size) {
 442     case 1:
 443         virtio_config_writeb(vdev, addr, val);
 444         break;
 445     case 2:
 446         if (virtio_is_big_endian()) {
 447             val = bswap16(val);
 448         }
 449         virtio_config_writew(vdev, addr, val);
 450         break;
 451     case 4:
 452         if (virtio_is_big_endian()) {
 453             val = bswap32(val);
 454         }
 455         virtio_config_writel(vdev, addr, val);
 456         break;
 457     }
 458 }
 459
 460 static const MemoryRegionOps virtio_pci_config_ops = {
 461     .read = virtio_pci_config_read,
 462     .write = virtio_pci_config_write,
 463     .impl = {
 464         .min_access_size = 1,
 465         .max_access_size = 4,
 466     },
 467     .endianness = DEVICE_LITTLE_ENDIAN,
 468 };
 469
 470 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
 471                                 uint32_t val, int len)
 472 {
 473     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 474     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 475
 476     pci_default_write_config(pci_dev, address, val, len);
 477
 478     if (range_covers_byte(address, len, PCI_COMMAND) &&
 479         !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) &&
 480         !(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) {
 481         virtio_pci_stop_ioeventfd(proxy);
 482         virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
 483     }
 484 }
 485
 486 static unsigned virtio_pci_get_features(DeviceState *d)
 487 {
 488     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 489     return proxy->host_features;
 490 }
 491
 492 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
 493                                         unsigned int queue_no,
 494                                         unsigned int vector,
 495                                         MSIMessage msg)
 496 {
 497     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 498     int ret;
 499
 500     if (irqfd->users == 0) {
 501         ret = kvm_irqchip_add_msi_route(kvm_state, msg);
 502         if (ret < 0) {
 503             return ret;
 504         }
 505         irqfd->virq = ret;
 506     }
 507     irqfd->users++;
 508     return 0;
 509 }
 510
 511 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy,
 512                                              unsigned int vector)
 513 {
 514     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 515     if (--irqfd->users == 0) {
 516         kvm_irqchip_release_virq(kvm_state, irqfd->virq);
 517     }
 518 }
 519
 520 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy,
 521                                  unsigned int queue_no,
 522                                  unsigned int vector)
 523 {
 524     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 525     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 526     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 527     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 528     int ret;
 529     ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, NULL, irqfd->virq);
 530     return ret;
 531 }
 532
 533 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
 534                                       unsigned int queue_no,
 535                                       unsigned int vector)
 536 {
 537     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 538     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 539     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 540     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 541     int ret;
 542
 543     ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq);
 544     assert(ret == 0);
 545 }
 546
 547 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
 548 {
 549     PCIDevice *dev = &proxy->pci_dev;
 550     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 551     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 552     unsigned int vector;
 553     int ret, queue_no;
 554     MSIMessage msg;
 555
 556     for (queue_no = 0; queue_no < nvqs; queue_no++) {
 557         if (!virtio_queue_get_num(vdev, queue_no)) {
 558             break;
 559         }
 560         vector = virtio_queue_vector(vdev, queue_no);
 561         if (vector >= msix_nr_vectors_allocated(dev)) {
 562             continue;
 563         }
 564         msg = msix_get_message(dev, vector);
 565         ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg);
 566         if (ret < 0) {
 567             goto undo;
 568         }
 569         /* If guest supports masking, set up irqfd now.
 570          * Otherwise, delay until unmasked in the frontend.
 571          */
 572         if (k->guest_notifier_mask) {
 573             ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
 574             if (ret < 0) {
 575                 kvm_virtio_pci_vq_vector_release(proxy, vector);
 576                 goto undo;
 577             }
 578         }
 579     }
 580     return 0;
 581
 582 undo:
 583     while (--queue_no >= 0) {
 584         vector = virtio_queue_vector(vdev, queue_no);
 585         if (vector >= msix_nr_vectors_allocated(dev)) {
 586             continue;
 587         }
 588         if (k->guest_notifier_mask) {
 589             kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 590         }
 591         kvm_virtio_pci_vq_vector_release(proxy, vector);
 592     }
 593     return ret;
 594 }
 595
 596 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
 597 {
 598     PCIDevice *dev = &proxy->pci_dev;
 599     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 600     unsigned int vector;
 601     int queue_no;
 602     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 603
 604     for (queue_no = 0; queue_no < nvqs; queue_no++) {
 605         if (!virtio_queue_get_num(vdev, queue_no)) {
 606             break;
 607         }
 608         vector = virtio_queue_vector(vdev, queue_no);
 609         if (vector >= msix_nr_vectors_allocated(dev)) {
 610             continue;
 611         }
 612         /* If guest supports masking, clean up irqfd now.
 613          * Otherwise, it was cleaned when masked in the frontend.
 614          */
 615         if (k->guest_notifier_mask) {
 616             kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 617         }
 618         kvm_virtio_pci_vq_vector_release(proxy, vector);
 619     }
 620 }
 621
 622 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
 623                                        unsigned int queue_no,
 624                                        unsigned int vector,
 625                                        MSIMessage msg)
 626 {
 627     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 628     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 629     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 630     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 631     VirtIOIRQFD *irqfd;
 632     int ret = 0;
 633
 634     if (proxy->vector_irqfd) {
 635         irqfd = &proxy->vector_irqfd[vector];
 636         if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) {
 637             ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg);
 638             if (ret < 0) {
 639                 return ret;
 640             }
 641         }
 642     }
 643
 644     /* If guest supports masking, irqfd is already setup, unmask it.
 645      * Otherwise, set it up now.
 646      */
 647     if (k->guest_notifier_mask) {
 648         k->guest_notifier_mask(vdev, queue_no, false);
 649         /* Test after unmasking to avoid losing events. */
 650         if (k->guest_notifier_pending &&
 651             k->guest_notifier_pending(vdev, queue_no)) {
 652             event_notifier_set(n);
 653         }
 654     } else {
 655         ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
 656     }
 657     return ret;
 658 }
 659
 660 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy,
 661                                              unsigned int queue_no,
 662                                              unsigned int vector)
 663 {
 664     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 665     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 666
 667     /* If guest supports masking, keep irqfd but mask it.
 668      * Otherwise, clean it up now.
 669      */
 670     if (k->guest_notifier_mask) {
 671         k->guest_notifier_mask(vdev, queue_no, true);
 672     } else {
 673         kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 674     }
 675 }
 676
 677 static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
 678                                     MSIMessage msg)
 679 {
 680     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 681     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 682     int ret, queue_no;
 683
 684     for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
 685         if (!virtio_queue_get_num(vdev, queue_no)) {
 686             break;
 687         }
 688         if (virtio_queue_vector(vdev, queue_no) != vector) {
 689             continue;
 690         }
 691         ret = virtio_pci_vq_vector_unmask(proxy, queue_no, vector, msg);
 692         if (ret < 0) {
 693             goto undo;
 694         }
 695     }
 696     return 0;
 697
 698 undo:
 699     while (--queue_no >= 0) {
 700         if (virtio_queue_vector(vdev, queue_no) != vector) {
 701             continue;
 702         }
 703         virtio_pci_vq_vector_mask(proxy, queue_no, vector);
 704     }
 705     return ret;
 706 }
 707
 708 static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
 709 {
 710     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 711     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 712     int queue_no;
 713
 714     for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
 715         if (!virtio_queue_get_num(vdev, queue_no)) {
 716             break;
 717         }
 718         if (virtio_queue_vector(vdev, queue_no) != vector) {
 719             continue;
 720         }
 721         virtio_pci_vq_vector_mask(proxy, queue_no, vector);
 722     }
 723 }
 724
 725 static void virtio_pci_vector_poll(PCIDevice *dev,
 726                                    unsigned int vector_start,
 727                                    unsigned int vector_end)
 728 {
 729     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 730     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 731     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 732     int queue_no;
 733     unsigned int vector;
 734     EventNotifier *notifier;
 735     VirtQueue *vq;
 736
 737     for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
 738         if (!virtio_queue_get_num(vdev, queue_no)) {
 739             break;
 740         }
 741         vector = virtio_queue_vector(vdev, queue_no);
 742         if (vector < vector_start || vector >= vector_end ||
 743             !msix_is_masked(dev, vector)) {
 744             continue;
 745         }
 746         vq = virtio_get_queue(vdev, queue_no);
 747         notifier = virtio_queue_get_guest_notifier(vq);
 748         if (k->guest_notifier_pending) {
 749             if (k->guest_notifier_pending(vdev, queue_no)) {
 750                 msix_set_pending(dev, vector);
 751             }
 752         } else if (event_notifier_test_and_clear(notifier)) {
 753             msix_set_pending(dev, vector);
 754         }
 755     }
 756 }
 757
 758 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
 759                                          bool with_irqfd)
 760 {
 761     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 762     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 763     VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
 764     VirtQueue *vq = virtio_get_queue(vdev, n);
 765     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 766
 767     if (assign) {
 768         int r = event_notifier_init(notifier, 0);
 769         if (r < 0) {
 770             return r;
 771         }
 772         virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
 773     } else {
 774         virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
 775         event_notifier_cleanup(notifier);
 776     }
 777
 778     if (!msix_enabled(&proxy->pci_dev) && vdc->guest_notifier_mask) {
 779         vdc->guest_notifier_mask(vdev, n, !assign);
 780     }
 781
 782     return 0;
 783 }
 784
 785 static bool virtio_pci_query_guest_notifiers(DeviceState *d)
 786 {
 787     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 788     return msix_enabled(&proxy->pci_dev);
 789 }
 790
 791 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
 792 {
 793     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 794     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 795     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 796     int r, n;
 797     bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
 798         kvm_msi_via_irqfd_enabled();
 799
 800     nvqs = MIN(nvqs, VIRTIO_PCI_QUEUE_MAX);
 801
 802     /* When deassigning, pass a consistent nvqs value
 803      * to avoid leaking notifiers.
 804      */
 805     assert(assign || nvqs == proxy->nvqs_with_notifiers);
 806
 807     proxy->nvqs_with_notifiers = nvqs;
 808
 809     /* Must unset vector notifier while guest notifier is still assigned */
 810     if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) {
 811         msix_unset_vector_notifiers(&proxy->pci_dev);
 812         if (proxy->vector_irqfd) {
 813             kvm_virtio_pci_vector_release(proxy, nvqs);
 814             g_free(proxy->vector_irqfd);
 815             proxy->vector_irqfd = NULL;
 816         }
 817     }
 818
 819     for (n = 0; n < nvqs; n++) {
 820         if (!virtio_queue_get_num(vdev, n)) {
 821             break;
 822         }
 823
 824         r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd);
 825         if (r < 0) {
 826             goto assign_error;
 827         }
 828     }
 829
 830     /* Must set vector notifier after guest notifier has been assigned */
 831     if ((with_irqfd || k->guest_notifier_mask) && assign) {
 832         if (with_irqfd) {
 833             proxy->vector_irqfd =
 834                 g_malloc0(sizeof(*proxy->vector_irqfd) *
 835                           msix_nr_vectors_allocated(&proxy->pci_dev));
 836             r = kvm_virtio_pci_vector_use(proxy, nvqs);
 837             if (r < 0) {
 838                 goto assign_error;
 839             }
 840         }
 841         r = msix_set_vector_notifiers(&proxy->pci_dev,
 842                                       virtio_pci_vector_unmask,
 843                                       virtio_pci_vector_mask,
 844                                       virtio_pci_vector_poll);
 845         if (r < 0) {
 846             goto notifiers_error;
 847         }
 848     }
 849
 850     return 0;
 851
 852 notifiers_error:
 853     if (with_irqfd) {
 854         assert(assign);
 855         kvm_virtio_pci_vector_release(proxy, nvqs);
 856     }
 857
 858 assign_error:
 859     /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
 860     assert(assign);
 861     while (--n >= 0) {
 862         virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd);
 863     }
 864     return r;
 865 }
 866
 867 static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign)
 868 {
 869     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 870
 871     /* Stop using ioeventfd for virtqueue kick if the device starts using host
 872      * notifiers.  This makes it easy to avoid stepping on each others' toes.
 873      */
 874     proxy->ioeventfd_disabled = assign;
 875     if (assign) {
 876         virtio_pci_stop_ioeventfd(proxy);
 877     }
 878     /* We don't need to start here: it's not needed because backend
 879      * currently only stops on status change away from ok,
 880      * reset, vmstop and such. If we do add code to start here,
 881      * need to check vmstate, device state etc. */
 882     return virtio_pci_set_host_notifier_internal(proxy, n, assign, false);
 883 }
 884
 885 static void virtio_pci_vmstate_change(DeviceState *d, bool running)
 886 {
 887     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 888     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 889
 890     if (running) {
 891         /* Try to find out if the guest has bus master disabled, but is
 892            in ready state. Then we have a buggy guest OS. */
 893         if ((vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
 894             !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 895             proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
 896         }
 897         virtio_pci_start_ioeventfd(proxy);
 898     } else {
 899         virtio_pci_stop_ioeventfd(proxy);
 900     }
 901 }
 902
 903 #ifdef CONFIG_VIRTFS
 904 static int virtio_9p_init_pci(VirtIOPCIProxy *vpci_dev)
 905 {
 906     V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev);
 907     DeviceState *vdev = DEVICE(&dev->vdev);
 908
 909     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
 910     if (qdev_init(vdev) < 0) {
 911         return -1;
 912     }
 913     return 0;
 914 }
 915
 916 static Property virtio_9p_pci_properties[] = {
 917     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
 918                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
 919     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
 920     DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 921     DEFINE_VIRTIO_9P_PROPERTIES(V9fsPCIState, vdev.fsconf),
 922     DEFINE_PROP_END_OF_LIST(),
 923 };
 924
 925 static void virtio_9p_pci_class_init(ObjectClass *klass, void *data)
 926 {
 927     DeviceClass *dc = DEVICE_CLASS(klass);
 928     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
 929     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
 930
 931     k->init = virtio_9p_init_pci;
 932     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
 933     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P;
 934     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
 935     pcidev_k->class_id = 0x2;
 936     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 937     dc->props = virtio_9p_pci_properties;
 938 }
 939
 940 static void virtio_9p_pci_instance_init(Object *obj)
 941 {
 942     V9fsPCIState *dev = VIRTIO_9P_PCI(obj);
 943     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_9P);
 944     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 945 }
 946
 947 static const TypeInfo virtio_9p_pci_info = {
 948     .name          = TYPE_VIRTIO_9P_PCI,
 949     .parent        = TYPE_VIRTIO_PCI,
 950     .instance_size = sizeof(V9fsPCIState),
 951     .instance_init = virtio_9p_pci_instance_init,
 952     .class_init    = virtio_9p_pci_class_init,
 953 };
 954 #endif /* CONFIG_VIRTFS */
 955
 956 /*
 957  * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
 958  */
 959
 960 /* This is called by virtio-bus just after the device is plugged. */
 961 static void virtio_pci_device_plugged(DeviceState *d)
 962 {
 963     VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
 964     VirtioBusState *bus = &proxy->bus;
 965     uint8_t *config;
 966     uint32_t size;
 967
 968     config = proxy->pci_dev.config;
 969     if (proxy->class_code) {
 970         pci_config_set_class(config, proxy->class_code);
 971     }
 972     pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID,
 973                  pci_get_word(config + PCI_VENDOR_ID));
 974     pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
 975     config[PCI_INTERRUPT_PIN] = 1;
 976
 977     if (proxy->nvectors &&
 978         msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1)) {
 979         error_report("unable to init msix vectors to %" PRIu32,
 980                      proxy->nvectors);
 981         proxy->nvectors = 0;
 982     }
 983
 984     proxy->pci_dev.config_write = virtio_write_config;
 985
 986     size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev)
 987          + virtio_bus_get_vdev_config_len(bus);
 988     if (size & (size - 1)) {
 989         size = 1 << qemu_fls(size);
 990     }
 991
 992     memory_region_init_io(&proxy->bar, OBJECT(proxy), &virtio_pci_config_ops,
 993                           proxy, "virtio-pci", size);
 994     pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
 995                      &proxy->bar);
 996
 997     if (!kvm_has_many_ioeventfds()) {
 998         proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
 999     }
1000
1001     proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
1002     proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
1003     proxy->host_features = virtio_bus_get_vdev_features(bus,
1004                                                       proxy->host_features);
1005 }
1006
1007 static void virtio_pci_device_unplugged(DeviceState *d)
1008 {
1009     PCIDevice *pci_dev = PCI_DEVICE(d);
1010     VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1011
1012     virtio_pci_stop_ioeventfd(proxy);
1013     msix_uninit_exclusive_bar(pci_dev);
1014 }
1015
1016 static int virtio_pci_init(PCIDevice *pci_dev)
1017 {
1018     VirtIOPCIProxy *dev = VIRTIO_PCI(pci_dev);
1019     VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev);
1020     virtio_pci_bus_new(&dev->bus, sizeof(dev->bus), dev);
1021     if (k->init != NULL) {
1022         return k->init(dev);
1023     }
1024     return 0;
1025 }
1026
1027 static void virtio_pci_exit(PCIDevice *pci_dev)
1028 {
1029     VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
1030     memory_region_destroy(&proxy->bar);
1031 }
1032
1033 static void virtio_pci_reset(DeviceState *qdev)
1034 {
1035     VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1036     VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
1037     virtio_pci_stop_ioeventfd(proxy);
1038     virtio_bus_reset(bus);
1039     msix_unuse_all_vectors(&proxy->pci_dev);
1040     proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
1041 }
1042
1043 static void virtio_pci_class_init(ObjectClass *klass, void *data)
1044 {
1045     DeviceClass *dc = DEVICE_CLASS(klass);
1046     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1047
1048     k->init = virtio_pci_init;
1049     k->exit = virtio_pci_exit;
1050     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1051     k->revision = VIRTIO_PCI_ABI_VERSION;
1052     k->class_id = PCI_CLASS_OTHERS;
1053     dc->reset = virtio_pci_reset;
1054 }
1055
1056 static const TypeInfo virtio_pci_info = {
1057     .name          = TYPE_VIRTIO_PCI,
1058     .parent        = TYPE_PCI_DEVICE,
1059     .instance_size = sizeof(VirtIOPCIProxy),
1060     .class_init    = virtio_pci_class_init,
1061     .class_size    = sizeof(VirtioPCIClass),
1062     .abstract      = true,
1063 };
1064
1065 /* virtio-blk-pci */
1066
1067 static Property virtio_blk_pci_properties[] = {
1068     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1069     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1070                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1071     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1072 #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
1073     DEFINE_PROP_BIT("x-data-plane", VirtIOBlkPCI, blk.data_plane, 0, false),
1074 #endif
1075     DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features),
1076     DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkPCI, blk),
1077     DEFINE_PROP_END_OF_LIST(),
1078 };
1079
1080 static int virtio_blk_pci_init(VirtIOPCIProxy *vpci_dev)
1081 {
1082     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
1083     DeviceState *vdev = DEVICE(&dev->vdev);
1084     virtio_blk_set_conf(vdev, &(dev->blk));
1085     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1086     if (qdev_init(vdev) < 0) {
1087         return -1;
1088     }
1089     return 0;
1090 }
1091
1092 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
1093 {
1094     DeviceClass *dc = DEVICE_CLASS(klass);
1095     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1096     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1097
1098     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1099     dc->props = virtio_blk_pci_properties;
1100     k->init = virtio_blk_pci_init;
1101     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1102     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
1103     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1104     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1105 }
1106
1107 static void virtio_blk_pci_instance_init(Object *obj)
1108 {
1109     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
1110     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BLK);
1111     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1112 }
1113
1114 static const TypeInfo virtio_blk_pci_info = {
1115     .name          = TYPE_VIRTIO_BLK_PCI,
1116     .parent        = TYPE_VIRTIO_PCI,
1117     .instance_size = sizeof(VirtIOBlkPCI),
1118     .instance_init = virtio_blk_pci_instance_init,
1119     .class_init    = virtio_blk_pci_class_init,
1120 };
1121
1122 /* virtio-scsi-pci */
1123
1124 static Property virtio_scsi_pci_properties[] = {
1125     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1126                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1127     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
1128                        DEV_NVECTORS_UNSPECIFIED),
1129     DEFINE_VIRTIO_SCSI_FEATURES(VirtIOPCIProxy, host_features),
1130     DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSIPCI, vdev.parent_obj.conf),
1131     DEFINE_PROP_END_OF_LIST(),
1132 };
1133
1134 static int virtio_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev)
1135 {
1136     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
1137     DeviceState *vdev = DEVICE(&dev->vdev);
1138     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
1139     DeviceState *proxy = DEVICE(vpci_dev);
1140     char *bus_name;
1141
1142     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1143         vpci_dev->nvectors = vs->conf.num_queues + 3;
1144     }
1145
1146     /*
1147      * For command line compatibility, this sets the virtio-scsi-device bus
1148      * name as before.
1149      */
1150     if (proxy->id) {
1151         bus_name = g_strdup_printf("%s.0", proxy->id);
1152         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1153         g_free(bus_name);
1154     }
1155
1156     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1157     if (qdev_init(vdev) < 0) {
1158         return -1;
1159     }
1160     return 0;
1161 }
1162
1163 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
1164 {
1165     DeviceClass *dc = DEVICE_CLASS(klass);
1166     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1167     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1168     k->init = virtio_scsi_pci_init_pci;
1169     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1170     dc->props = virtio_scsi_pci_properties;
1171     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1172     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
1173     pcidev_k->revision = 0x00;
1174     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1175 }
1176
1177 static void virtio_scsi_pci_instance_init(Object *obj)
1178 {
1179     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
1180     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SCSI);
1181     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1182 }
1183
1184 static const TypeInfo virtio_scsi_pci_info = {
1185     .name          = TYPE_VIRTIO_SCSI_PCI,
1186     .parent        = TYPE_VIRTIO_PCI,
1187     .instance_size = sizeof(VirtIOSCSIPCI),
1188     .instance_init = virtio_scsi_pci_instance_init,
1189     .class_init    = virtio_scsi_pci_class_init,
1190 };
1191
1192 /* vhost-scsi-pci */
1193
1194 #ifdef CONFIG_VHOST_SCSI
1195 static Property vhost_scsi_pci_properties[] = {
1196     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
1197                        DEV_NVECTORS_UNSPECIFIED),
1198     DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1199     DEFINE_VHOST_SCSI_PROPERTIES(VHostSCSIPCI, vdev.parent_obj.conf),
1200     DEFINE_PROP_END_OF_LIST(),
1201 };
1202
1203 static int vhost_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev)
1204 {
1205     VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
1206     DeviceState *vdev = DEVICE(&dev->vdev);
1207     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
1208
1209     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1210         vpci_dev->nvectors = vs->conf.num_queues + 3;
1211     }
1212
1213     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1214     if (qdev_init(vdev) < 0) {
1215         return -1;
1216     }
1217     return 0;
1218 }
1219
1220 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data)
1221 {
1222     DeviceClass *dc = DEVICE_CLASS(klass);
1223     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1224     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1225     k->init = vhost_scsi_pci_init_pci;
1226     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1227     dc->props = vhost_scsi_pci_properties;
1228     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1229     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
1230     pcidev_k->revision = 0x00;
1231     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1232 }
1233
1234 static void vhost_scsi_pci_instance_init(Object *obj)
1235 {
1236     VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
1237     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VHOST_SCSI);
1238     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1239 }
1240
1241 static const TypeInfo vhost_scsi_pci_info = {
1242     .name          = TYPE_VHOST_SCSI_PCI,
1243     .parent        = TYPE_VIRTIO_PCI,
1244     .instance_size = sizeof(VHostSCSIPCI),
1245     .instance_init = vhost_scsi_pci_instance_init,
1246     .class_init    = vhost_scsi_pci_class_init,
1247 };
1248 #endif
1249
1250 /* virtio-balloon-pci */
1251
1252 static void balloon_pci_stats_get_all(Object *obj, struct Visitor *v,
1253                                       void *opaque, const char *name,
1254                                       Error **errp)
1255 {
1256     VirtIOBalloonPCI *dev = opaque;
1257     object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp);
1258 }
1259
1260 static void balloon_pci_stats_get_poll_interval(Object *obj, struct Visitor *v,
1261                                                 void *opaque, const char *name,
1262                                                 Error **errp)
1263 {
1264     VirtIOBalloonPCI *dev = opaque;
1265     object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
1266                         errp);
1267 }
1268
1269 static void balloon_pci_stats_set_poll_interval(Object *obj, struct Visitor *v,
1270                                                 void *opaque, const char *name,
1271                                                 Error **errp)
1272 {
1273     VirtIOBalloonPCI *dev = opaque;
1274     object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
1275                         errp);
1276 }
1277
1278 static Property virtio_balloon_pci_properties[] = {
1279     DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1280     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1281     DEFINE_PROP_END_OF_LIST(),
1282 };
1283
1284 static int virtio_balloon_pci_init(VirtIOPCIProxy *vpci_dev)
1285 {
1286     VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev);
1287     DeviceState *vdev = DEVICE(&dev->vdev);
1288
1289     if (vpci_dev->class_code != PCI_CLASS_OTHERS &&
1290         vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
1291         vpci_dev->class_code = PCI_CLASS_OTHERS;
1292     }
1293
1294     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1295     if (qdev_init(vdev) < 0) {
1296         return -1;
1297     }
1298     return 0;
1299 }
1300
1301 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data)
1302 {
1303     DeviceClass *dc = DEVICE_CLASS(klass);
1304     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1305     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1306     k->init = virtio_balloon_pci_init;
1307     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1308     dc->props = virtio_balloon_pci_properties;
1309     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1310     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON;
1311     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1312     pcidev_k->class_id = PCI_CLASS_OTHERS;
1313 }
1314
1315 static void virtio_balloon_pci_instance_init(Object *obj)
1316 {
1317     VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj);
1318     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BALLOON);
1319     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1320
1321     object_property_add(obj, "guest-stats", "guest statistics",
1322                         balloon_pci_stats_get_all, NULL, NULL, dev,
1323                         NULL);
1324
1325     object_property_add(obj, "guest-stats-polling-interval", "int",
1326                         balloon_pci_stats_get_poll_interval,
1327                         balloon_pci_stats_set_poll_interval,
1328                         NULL, dev, NULL);
1329 }
1330
1331 static const TypeInfo virtio_balloon_pci_info = {
1332     .name          = TYPE_VIRTIO_BALLOON_PCI,
1333     .parent        = TYPE_VIRTIO_PCI,
1334     .instance_size = sizeof(VirtIOBalloonPCI),
1335     .instance_init = virtio_balloon_pci_instance_init,
1336     .class_init    = virtio_balloon_pci_class_init,
1337 };
1338
1339 /* virtio-serial-pci */
1340
1341 static int virtio_serial_pci_init(VirtIOPCIProxy *vpci_dev)
1342 {
1343     VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev);
1344     DeviceState *vdev = DEVICE(&dev->vdev);
1345     DeviceState *proxy = DEVICE(vpci_dev);
1346     char *bus_name;
1347
1348     if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
1349         vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
1350         vpci_dev->class_code != PCI_CLASS_OTHERS) {        /* qemu-kvm  */
1351             vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER;
1352     }
1353
1354     /* backwards-compatibility with machines that were created with
1355        DEV_NVECTORS_UNSPECIFIED */
1356     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1357         vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1;
1358     }
1359
1360     /*
1361      * For command line compatibility, this sets the virtio-serial-device bus
1362      * name as before.
1363      */
1364     if (proxy->id) {
1365         bus_name = g_strdup_printf("%s.0", proxy->id);
1366         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1367         g_free(bus_name);
1368     }
1369
1370     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1371     if (qdev_init(vdev) < 0) {
1372         return -1;
1373     }
1374     return 0;
1375 }
1376
1377 static Property virtio_serial_pci_properties[] = {
1378     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1379                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1380     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1381     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1382     DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1383     DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtIOSerialPCI, vdev.serial),
1384     DEFINE_PROP_END_OF_LIST(),
1385 };
1386
1387 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data)
1388 {
1389     DeviceClass *dc = DEVICE_CLASS(klass);
1390     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1391     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1392     k->init = virtio_serial_pci_init;
1393     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
1394     dc->props = virtio_serial_pci_properties;
1395     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1396     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
1397     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1398     pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
1399 }
1400
1401 static void virtio_serial_pci_instance_init(Object *obj)
1402 {
1403     VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj);
1404     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL);
1405     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1406 }
1407
1408 static const TypeInfo virtio_serial_pci_info = {
1409     .name          = TYPE_VIRTIO_SERIAL_PCI,
1410     .parent        = TYPE_VIRTIO_PCI,
1411     .instance_size = sizeof(VirtIOSerialPCI),
1412     .instance_init = virtio_serial_pci_instance_init,
1413     .class_init    = virtio_serial_pci_class_init,
1414 };
1415
1416 /* virtio-net-pci */
1417
1418 static Property virtio_net_properties[] = {
1419     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1420                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false),
1421     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
1422     DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features),
1423     DEFINE_NIC_PROPERTIES(VirtIONetPCI, vdev.nic_conf),
1424     DEFINE_VIRTIO_NET_PROPERTIES(VirtIONetPCI, vdev.net_conf),
1425     DEFINE_PROP_END_OF_LIST(),
1426 };
1427
1428 static int virtio_net_pci_init(VirtIOPCIProxy *vpci_dev)
1429 {
1430     DeviceState *qdev = DEVICE(vpci_dev);
1431     VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev);
1432     DeviceState *vdev = DEVICE(&dev->vdev);
1433
1434     virtio_net_set_config_size(&dev->vdev, vpci_dev->host_features);
1435     virtio_net_set_netclient_name(&dev->vdev, qdev->id,
1436                                   object_get_typename(OBJECT(qdev)));
1437     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1438     if (qdev_init(vdev) < 0) {
1439         return -1;
1440     }
1441     return 0;
1442 }
1443
1444 static void virtio_net_pci_class_init(ObjectClass *klass, void *data)
1445 {
1446     DeviceClass *dc = DEVICE_CLASS(klass);
1447     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1448     VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
1449
1450     k->romfile = "efi-virtio.rom";
1451     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1452     k->device_id = PCI_DEVICE_ID_VIRTIO_NET;
1453     k->revision = VIRTIO_PCI_ABI_VERSION;
1454     k->class_id = PCI_CLASS_NETWORK_ETHERNET;
1455     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
1456     dc->props = virtio_net_properties;
1457     vpciklass->init = virtio_net_pci_init;
1458 }
1459
1460 static void virtio_net_pci_instance_init(Object *obj)
1461 {
1462     VirtIONetPCI *dev = VIRTIO_NET_PCI(obj);
1463     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_NET);
1464     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1465 }
1466
1467 static const TypeInfo virtio_net_pci_info = {
1468     .name          = TYPE_VIRTIO_NET_PCI,
1469     .parent        = TYPE_VIRTIO_PCI,
1470     .instance_size = sizeof(VirtIONetPCI),
1471     .instance_init = virtio_net_pci_instance_init,
1472     .class_init    = virtio_net_pci_class_init,
1473 };
1474
1475 /* virtio-rng-pci */
1476
1477 static Property virtio_rng_pci_properties[] = {
1478     DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1479     DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORngPCI, vdev.conf),
1480     DEFINE_PROP_END_OF_LIST(),
1481 };
1482
1483 static int virtio_rng_pci_init(VirtIOPCIProxy *vpci_dev)
1484 {
1485     VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev);
1486     DeviceState *vdev = DEVICE(&vrng->vdev);
1487
1488     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1489     if (qdev_init(vdev) < 0) {
1490         return -1;
1491     }
1492
1493     object_property_set_link(OBJECT(vrng),
1494                              OBJECT(vrng->vdev.conf.rng), "rng",
1495                              NULL);
1496
1497     return 0;
1498 }
1499
1500 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data)
1501 {
1502     DeviceClass *dc = DEVICE_CLASS(klass);
1503     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1504     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1505
1506     k->init = virtio_rng_pci_init;
1507     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1508     dc->props = virtio_rng_pci_properties;
1509
1510     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1511     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG;
1512     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1513     pcidev_k->class_id = PCI_CLASS_OTHERS;
1514 }
1515
1516 static void virtio_rng_initfn(Object *obj)
1517 {
1518     VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj);
1519     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_RNG);
1520     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1521     object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
1522                              (Object **)&dev->vdev.conf.rng,
1523                              qdev_prop_allow_set_link_before_realize,
1524                              OBJ_PROP_LINK_UNREF_ON_RELEASE, NULL);
1525
1526 }
1527
1528 static const TypeInfo virtio_rng_pci_info = {
1529     .name          = TYPE_VIRTIO_RNG_PCI,
1530     .parent        = TYPE_VIRTIO_PCI,
1531     .instance_size = sizeof(VirtIORngPCI),
1532     .instance_init = virtio_rng_initfn,
1533     .class_init    = virtio_rng_pci_class_init,
1534 };
1535
1536 /* virtio-pci-bus */
1537
1538 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
1539                                VirtIOPCIProxy *dev)
1540 {
1541     DeviceState *qdev = DEVICE(dev);
1542     BusState *qbus;
1543     char virtio_bus_name[] = "virtio-bus";
1544
1545     qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev,
1546                         virtio_bus_name);
1547     qbus = BUS(bus);
1548     qbus->allow_hotplug = 1;
1549 }
1550
1551 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
1552 {
1553     BusClass *bus_class = BUS_CLASS(klass);
1554     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1555     bus_class->max_dev = 1;
1556     k->notify = virtio_pci_notify;
1557     k->save_config = virtio_pci_save_config;
1558     k->load_config = virtio_pci_load_config;
1559     k->save_queue = virtio_pci_save_queue;
1560     k->load_queue = virtio_pci_load_queue;
1561     k->get_features = virtio_pci_get_features;
1562     k->query_guest_notifiers = virtio_pci_query_guest_notifiers;
1563     k->set_host_notifier = virtio_pci_set_host_notifier;
1564     k->set_guest_notifiers = virtio_pci_set_guest_notifiers;
1565     k->vmstate_change = virtio_pci_vmstate_change;
1566     k->device_plugged = virtio_pci_device_plugged;
1567     k->device_unplugged = virtio_pci_device_unplugged;
1568 }
1569
1570 static const TypeInfo virtio_pci_bus_info = {
1571     .name          = TYPE_VIRTIO_PCI_BUS,
1572     .parent        = TYPE_VIRTIO_BUS,
1573     .instance_size = sizeof(VirtioPCIBusState),
1574     .class_init    = virtio_pci_bus_class_init,
1575 };
1576
1577 static void virtio_pci_register_types(void)
1578 {
1579     type_register_static(&virtio_rng_pci_info);
1580     type_register_static(&virtio_pci_bus_info);
1581     type_register_static(&virtio_pci_info);
1582 #ifdef CONFIG_VIRTFS
1583     type_register_static(&virtio_9p_pci_info);
1584 #endif
1585     type_register_static(&virtio_blk_pci_info);
1586     type_register_static(&virtio_scsi_pci_info);
1587     type_register_static(&virtio_balloon_pci_info);
1588     type_register_static(&virtio_serial_pci_info);
1589     type_register_static(&virtio_net_pci_info);
1590 #ifdef CONFIG_VHOST_SCSI
1591     type_register_static(&vhost_scsi_pci_info);
1592 #endif
1593 }
1594
1595 type_init(virtio_pci_register_types)