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 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
  90                                VirtIOPCIProxy *dev);
  91
  92 /* virtio device */
  93 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */
  94 static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d)
  95 {
  96     return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
  97 }
  98
  99 /* DeviceState to VirtIOPCIProxy. Note: used on datapath,
 100  * be careful and test performance if you change this.
 101  */
 102 static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d)
 103 {
 104     return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
 105 }
 106
 107 static void virtio_pci_notify(DeviceState *d, uint16_t vector)
 108 {
 109     VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d);
 110
 111     if (msix_enabled(&proxy->pci_dev))
 112         msix_notify(&proxy->pci_dev, vector);
 113     else {
 114         VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 115         pci_set_irq(&proxy->pci_dev, vdev->isr & 1);
 116     }
 117 }
 118
 119 static void virtio_pci_save_config(DeviceState *d, QEMUFile *f)
 120 {
 121     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 122     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 123
 124     pci_device_save(&proxy->pci_dev, f);
 125     msix_save(&proxy->pci_dev, f);
 126     if (msix_present(&proxy->pci_dev))
 127         qemu_put_be16(f, vdev->config_vector);
 128 }
 129
 130 static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f)
 131 {
 132     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 133     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 134
 135     if (msix_present(&proxy->pci_dev))
 136         qemu_put_be16(f, virtio_queue_vector(vdev, n));
 137 }
 138
 139 static int virtio_pci_load_config(DeviceState *d, QEMUFile *f)
 140 {
 141     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 142     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 143
 144     int ret;
 145     ret = pci_device_load(&proxy->pci_dev, f);
 146     if (ret) {
 147         return ret;
 148     }
 149     msix_unuse_all_vectors(&proxy->pci_dev);
 150     msix_load(&proxy->pci_dev, f);
 151     if (msix_present(&proxy->pci_dev)) {
 152         qemu_get_be16s(f, &vdev->config_vector);
 153     } else {
 154         vdev->config_vector = VIRTIO_NO_VECTOR;
 155     }
 156     if (vdev->config_vector != VIRTIO_NO_VECTOR) {
 157         return msix_vector_use(&proxy->pci_dev, vdev->config_vector);
 158     }
 159     return 0;
 160 }
 161
 162 static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f)
 163 {
 164     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 165     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 166
 167     uint16_t vector;
 168     if (msix_present(&proxy->pci_dev)) {
 169         qemu_get_be16s(f, &vector);
 170     } else {
 171         vector = VIRTIO_NO_VECTOR;
 172     }
 173     virtio_queue_set_vector(vdev, n, vector);
 174     if (vector != VIRTIO_NO_VECTOR) {
 175         return msix_vector_use(&proxy->pci_dev, vector);
 176     }
 177     return 0;
 178 }
 179
 180 static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy,
 181                                                  int n, bool assign, bool set_handler)
 182 {
 183     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 184     VirtQueue *vq = virtio_get_queue(vdev, n);
 185     EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
 186     int r = 0;
 187
 188     if (assign) {
 189         r = event_notifier_init(notifier, 1);
 190         if (r < 0) {
 191             error_report("%s: unable to init event notifier: %d",
 192                          __func__, r);
 193             return r;
 194         }
 195         virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
 196         memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
 197                                   true, n, notifier);
 198     } else {
 199         memory_region_del_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
 200                                   true, n, notifier);
 201         virtio_queue_set_host_notifier_fd_handler(vq, false, false);
 202         event_notifier_cleanup(notifier);
 203     }
 204     return r;
 205 }
 206
 207 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
 208 {
 209     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 210     int n, r;
 211
 212     if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) ||
 213         proxy->ioeventfd_disabled ||
 214         proxy->ioeventfd_started) {
 215         return;
 216     }
 217
 218     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 219         if (!virtio_queue_get_num(vdev, n)) {
 220             continue;
 221         }
 222
 223         r = virtio_pci_set_host_notifier_internal(proxy, n, true, true);
 224         if (r < 0) {
 225             goto assign_error;
 226         }
 227     }
 228     proxy->ioeventfd_started = true;
 229     return;
 230
 231 assign_error:
 232     while (--n >= 0) {
 233         if (!virtio_queue_get_num(vdev, n)) {
 234             continue;
 235         }
 236
 237         r = virtio_pci_set_host_notifier_internal(proxy, n, false, false);
 238         assert(r >= 0);
 239     }
 240     proxy->ioeventfd_started = false;
 241     error_report("%s: failed. Fallback to a userspace (slower).", __func__);
 242 }
 243
 244 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
 245 {
 246     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 247     int r;
 248     int n;
 249
 250     if (!proxy->ioeventfd_started) {
 251         return;
 252     }
 253
 254     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 255         if (!virtio_queue_get_num(vdev, n)) {
 256             continue;
 257         }
 258
 259         r = virtio_pci_set_host_notifier_internal(proxy, n, false, false);
 260         assert(r >= 0);
 261     }
 262     proxy->ioeventfd_started = false;
 263 }
 264
 265 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 266 {
 267     VirtIOPCIProxy *proxy = opaque;
 268     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 269     hwaddr pa;
 270
 271     switch (addr) {
 272     case VIRTIO_PCI_GUEST_FEATURES:
 273         /* Guest does not negotiate properly?  We have to assume nothing. */
 274         if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
 275             val = virtio_bus_get_vdev_bad_features(&proxy->bus);
 276         }
 277         virtio_set_features(vdev, val);
 278         break;
 279     case VIRTIO_PCI_QUEUE_PFN:
 280         pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 281         if (pa == 0) {
 282             virtio_pci_stop_ioeventfd(proxy);
 283             virtio_reset(vdev);
 284             msix_unuse_all_vectors(&proxy->pci_dev);
 285         }
 286         else
 287             virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
 288         break;
 289     case VIRTIO_PCI_QUEUE_SEL:
 290         if (val < VIRTIO_PCI_QUEUE_MAX)
 291             vdev->queue_sel = val;
 292         break;
 293     case VIRTIO_PCI_QUEUE_NOTIFY:
 294         if (val < VIRTIO_PCI_QUEUE_MAX) {
 295             virtio_queue_notify(vdev, val);
 296         }
 297         break;
 298     case VIRTIO_PCI_STATUS:
 299         if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
 300             virtio_pci_stop_ioeventfd(proxy);
 301         }
 302
 303         virtio_set_status(vdev, val & 0xFF);
 304
 305         if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
 306             virtio_pci_start_ioeventfd(proxy);
 307         }
 308
 309         if (vdev->status == 0) {
 310             virtio_reset(vdev);
 311             msix_unuse_all_vectors(&proxy->pci_dev);
 312         }
 313
 314         /* Linux before 2.6.34 drives the device without enabling
 315            the PCI device bus master bit. Enable it automatically
 316            for the guest. This is a PCI spec violation but so is
 317            initiating DMA with bus master bit clear. */
 318         if (val == (VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER)) {
 319             pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
 320                                      proxy->pci_dev.config[PCI_COMMAND] |
 321                                      PCI_COMMAND_MASTER, 1);
 322         }
 323         break;
 324     case VIRTIO_MSI_CONFIG_VECTOR:
 325         msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
 326         /* Make it possible for guest to discover an error took place. */
 327         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 328             val = VIRTIO_NO_VECTOR;
 329         vdev->config_vector = val;
 330         break;
 331     case VIRTIO_MSI_QUEUE_VECTOR:
 332         msix_vector_unuse(&proxy->pci_dev,
 333                           virtio_queue_vector(vdev, vdev->queue_sel));
 334         /* Make it possible for guest to discover an error took place. */
 335         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 336             val = VIRTIO_NO_VECTOR;
 337         virtio_queue_set_vector(vdev, vdev->queue_sel, val);
 338         break;
 339     default:
 340         error_report("%s: unexpected address 0x%x value 0x%x",
 341                      __func__, addr, val);
 342         break;
 343     }
 344 }
 345
 346 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
 347 {
 348     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 349     uint32_t ret = 0xFFFFFFFF;
 350
 351     switch (addr) {
 352     case VIRTIO_PCI_HOST_FEATURES:
 353         ret = proxy->host_features;
 354         break;
 355     case VIRTIO_PCI_GUEST_FEATURES:
 356         ret = vdev->guest_features;
 357         break;
 358     case VIRTIO_PCI_QUEUE_PFN:
 359         ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
 360               >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 361         break;
 362     case VIRTIO_PCI_QUEUE_NUM:
 363         ret = virtio_queue_get_num(vdev, vdev->queue_sel);
 364         break;
 365     case VIRTIO_PCI_QUEUE_SEL:
 366         ret = vdev->queue_sel;
 367         break;
 368     case VIRTIO_PCI_STATUS:
 369         ret = vdev->status;
 370         break;
 371     case VIRTIO_PCI_ISR:
 372         /* reading from the ISR also clears it. */
 373         ret = vdev->isr;
 374         vdev->isr = 0;
 375         pci_irq_deassert(&proxy->pci_dev);
 376         break;
 377     case VIRTIO_MSI_CONFIG_VECTOR:
 378         ret = vdev->config_vector;
 379         break;
 380     case VIRTIO_MSI_QUEUE_VECTOR:
 381         ret = virtio_queue_vector(vdev, vdev->queue_sel);
 382         break;
 383     default:
 384         break;
 385     }
 386
 387     return ret;
 388 }
 389
 390 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr,
 391                                        unsigned size)
 392 {
 393     VirtIOPCIProxy *proxy = opaque;
 394     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 395     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 396     uint64_t val = 0;
 397     if (addr < config) {
 398         return virtio_ioport_read(proxy, addr);
 399     }
 400     addr -= config;
 401
 402     switch (size) {
 403     case 1:
 404         val = virtio_config_readb(vdev, addr);
 405         break;
 406     case 2:
 407         val = virtio_config_readw(vdev, addr);
 408         if (virtio_is_big_endian(vdev)) {
 409             val = bswap16(val);
 410         }
 411         break;
 412     case 4:
 413         val = virtio_config_readl(vdev, addr);
 414         if (virtio_is_big_endian(vdev)) {
 415             val = bswap32(val);
 416         }
 417         break;
 418     }
 419     return val;
 420 }
 421
 422 static void virtio_pci_config_write(void *opaque, hwaddr addr,
 423                                     uint64_t val, unsigned size)
 424 {
 425     VirtIOPCIProxy *proxy = opaque;
 426     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 427     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 428     if (addr < config) {
 429         virtio_ioport_write(proxy, addr, val);
 430         return;
 431     }
 432     addr -= config;
 433     /*
 434      * Virtio-PCI is odd. Ioports are LE but config space is target native
 435      * endian.
 436      */
 437     switch (size) {
 438     case 1:
 439         virtio_config_writeb(vdev, addr, val);
 440         break;
 441     case 2:
 442         if (virtio_is_big_endian(vdev)) {
 443             val = bswap16(val);
 444         }
 445         virtio_config_writew(vdev, addr, val);
 446         break;
 447     case 4:
 448         if (virtio_is_big_endian(vdev)) {
 449             val = bswap32(val);
 450         }
 451         virtio_config_writel(vdev, addr, val);
 452         break;
 453     }
 454 }
 455
 456 static const MemoryRegionOps virtio_pci_config_ops = {
 457     .read = virtio_pci_config_read,
 458     .write = virtio_pci_config_write,
 459     .impl = {
 460         .min_access_size = 1,
 461         .max_access_size = 4,
 462     },
 463     .endianness = DEVICE_LITTLE_ENDIAN,
 464 };
 465
 466 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
 467                                 uint32_t val, int len)
 468 {
 469     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 470     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 471
 472     uint8_t cmd = proxy->pci_dev.config[PCI_COMMAND];
 473
 474     pci_default_write_config(pci_dev, address, val, len);
 475
 476     if (range_covers_byte(address, len, PCI_COMMAND) &&
 477         !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) &&
 478         (cmd & PCI_COMMAND_MASTER)) {
 479         /* Bus driver disables bus mastering - make it act
 480          * as a kind of reset to render the device quiescent. */
 481         virtio_pci_stop_ioeventfd(proxy);
 482         virtio_reset(vdev);
 483         msix_unuse_all_vectors(&proxy->pci_dev);
 484     }
 485 }
 486
 487 static unsigned virtio_pci_get_features(DeviceState *d)
 488 {
 489     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 490     return proxy->host_features;
 491 }
 492
 493 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
 494                                         unsigned int queue_no,
 495                                         unsigned int vector,
 496                                         MSIMessage msg)
 497 {
 498     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 499     int ret;
 500
 501     if (irqfd->users == 0) {
 502         ret = kvm_irqchip_add_msi_route(kvm_state, msg);
 503         if (ret < 0) {
 504             return ret;
 505         }
 506         irqfd->virq = ret;
 507     }
 508     irqfd->users++;
 509     return 0;
 510 }
 511
 512 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy,
 513                                              unsigned int vector)
 514 {
 515     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 516     if (--irqfd->users == 0) {
 517         kvm_irqchip_release_virq(kvm_state, irqfd->virq);
 518     }
 519 }
 520
 521 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy,
 522                                  unsigned int queue_no,
 523                                  unsigned int vector)
 524 {
 525     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 526     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 527     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 528     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 529     int ret;
 530     ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, NULL, irqfd->virq);
 531     return ret;
 532 }
 533
 534 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
 535                                       unsigned int queue_no,
 536                                       unsigned int vector)
 537 {
 538     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 539     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 540     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 541     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 542     int ret;
 543
 544     ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq);
 545     assert(ret == 0);
 546 }
 547
 548 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
 549 {
 550     PCIDevice *dev = &proxy->pci_dev;
 551     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 552     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 553     unsigned int vector;
 554     int ret, queue_no;
 555     MSIMessage msg;
 556
 557     for (queue_no = 0; queue_no < nvqs; queue_no++) {
 558         if (!virtio_queue_get_num(vdev, queue_no)) {
 559             break;
 560         }
 561         vector = virtio_queue_vector(vdev, queue_no);
 562         if (vector >= msix_nr_vectors_allocated(dev)) {
 563             continue;
 564         }
 565         msg = msix_get_message(dev, vector);
 566         ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg);
 567         if (ret < 0) {
 568             goto undo;
 569         }
 570         /* If guest supports masking, set up irqfd now.
 571          * Otherwise, delay until unmasked in the frontend.
 572          */
 573         if (k->guest_notifier_mask) {
 574             ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
 575             if (ret < 0) {
 576                 kvm_virtio_pci_vq_vector_release(proxy, vector);
 577                 goto undo;
 578             }
 579         }
 580     }
 581     return 0;
 582
 583 undo:
 584     while (--queue_no >= 0) {
 585         vector = virtio_queue_vector(vdev, queue_no);
 586         if (vector >= msix_nr_vectors_allocated(dev)) {
 587             continue;
 588         }
 589         if (k->guest_notifier_mask) {
 590             kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 591         }
 592         kvm_virtio_pci_vq_vector_release(proxy, vector);
 593     }
 594     return ret;
 595 }
 596
 597 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
 598 {
 599     PCIDevice *dev = &proxy->pci_dev;
 600     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 601     unsigned int vector;
 602     int queue_no;
 603     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 604
 605     for (queue_no = 0; queue_no < nvqs; queue_no++) {
 606         if (!virtio_queue_get_num(vdev, queue_no)) {
 607             break;
 608         }
 609         vector = virtio_queue_vector(vdev, queue_no);
 610         if (vector >= msix_nr_vectors_allocated(dev)) {
 611             continue;
 612         }
 613         /* If guest supports masking, clean up irqfd now.
 614          * Otherwise, it was cleaned when masked in the frontend.
 615          */
 616         if (k->guest_notifier_mask) {
 617             kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 618         }
 619         kvm_virtio_pci_vq_vector_release(proxy, vector);
 620     }
 621 }
 622
 623 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
 624                                        unsigned int queue_no,
 625                                        unsigned int vector,
 626                                        MSIMessage msg)
 627 {
 628     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 629     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 630     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 631     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 632     VirtIOIRQFD *irqfd;
 633     int ret = 0;
 634
 635     if (proxy->vector_irqfd) {
 636         irqfd = &proxy->vector_irqfd[vector];
 637         if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) {
 638             ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg);
 639             if (ret < 0) {
 640                 return ret;
 641             }
 642         }
 643     }
 644
 645     /* If guest supports masking, irqfd is already setup, unmask it.
 646      * Otherwise, set it up now.
 647      */
 648     if (k->guest_notifier_mask) {
 649         k->guest_notifier_mask(vdev, queue_no, false);
 650         /* Test after unmasking to avoid losing events. */
 651         if (k->guest_notifier_pending &&
 652             k->guest_notifier_pending(vdev, queue_no)) {
 653             event_notifier_set(n);
 654         }
 655     } else {
 656         ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
 657     }
 658     return ret;
 659 }
 660
 661 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy,
 662                                              unsigned int queue_no,
 663                                              unsigned int vector)
 664 {
 665     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 666     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 667
 668     /* If guest supports masking, keep irqfd but mask it.
 669      * Otherwise, clean it up now.
 670      */
 671     if (k->guest_notifier_mask) {
 672         k->guest_notifier_mask(vdev, queue_no, true);
 673     } else {
 674         kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 675     }
 676 }
 677
 678 static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
 679                                     MSIMessage msg)
 680 {
 681     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 682     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 683     int ret, queue_no;
 684
 685     for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
 686         if (!virtio_queue_get_num(vdev, queue_no)) {
 687             break;
 688         }
 689         if (virtio_queue_vector(vdev, queue_no) != vector) {
 690             continue;
 691         }
 692         ret = virtio_pci_vq_vector_unmask(proxy, queue_no, vector, msg);
 693         if (ret < 0) {
 694             goto undo;
 695         }
 696     }
 697     return 0;
 698
 699 undo:
 700     while (--queue_no >= 0) {
 701         if (virtio_queue_vector(vdev, queue_no) != vector) {
 702             continue;
 703         }
 704         virtio_pci_vq_vector_mask(proxy, queue_no, vector);
 705     }
 706     return ret;
 707 }
 708
 709 static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
 710 {
 711     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 712     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 713     int queue_no;
 714
 715     for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
 716         if (!virtio_queue_get_num(vdev, queue_no)) {
 717             break;
 718         }
 719         if (virtio_queue_vector(vdev, queue_no) != vector) {
 720             continue;
 721         }
 722         virtio_pci_vq_vector_mask(proxy, queue_no, vector);
 723     }
 724 }
 725
 726 static void virtio_pci_vector_poll(PCIDevice *dev,
 727                                    unsigned int vector_start,
 728                                    unsigned int vector_end)
 729 {
 730     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 731     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 732     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 733     int queue_no;
 734     unsigned int vector;
 735     EventNotifier *notifier;
 736     VirtQueue *vq;
 737
 738     for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
 739         if (!virtio_queue_get_num(vdev, queue_no)) {
 740             break;
 741         }
 742         vector = virtio_queue_vector(vdev, queue_no);
 743         if (vector < vector_start || vector >= vector_end ||
 744             !msix_is_masked(dev, vector)) {
 745             continue;
 746         }
 747         vq = virtio_get_queue(vdev, queue_no);
 748         notifier = virtio_queue_get_guest_notifier(vq);
 749         if (k->guest_notifier_pending) {
 750             if (k->guest_notifier_pending(vdev, queue_no)) {
 751                 msix_set_pending(dev, vector);
 752             }
 753         } else if (event_notifier_test_and_clear(notifier)) {
 754             msix_set_pending(dev, vector);
 755         }
 756     }
 757 }
 758
 759 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
 760                                          bool with_irqfd)
 761 {
 762     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 763     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 764     VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
 765     VirtQueue *vq = virtio_get_queue(vdev, n);
 766     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 767
 768     if (assign) {
 769         int r = event_notifier_init(notifier, 0);
 770         if (r < 0) {
 771             return r;
 772         }
 773         virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
 774     } else {
 775         virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
 776         event_notifier_cleanup(notifier);
 777     }
 778
 779     if (!msix_enabled(&proxy->pci_dev) && vdc->guest_notifier_mask) {
 780         vdc->guest_notifier_mask(vdev, n, !assign);
 781     }
 782
 783     return 0;
 784 }
 785
 786 static bool virtio_pci_query_guest_notifiers(DeviceState *d)
 787 {
 788     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 789     return msix_enabled(&proxy->pci_dev);
 790 }
 791
 792 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
 793 {
 794     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 795     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 796     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 797     int r, n;
 798     bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
 799         kvm_msi_via_irqfd_enabled();
 800
 801     nvqs = MIN(nvqs, VIRTIO_PCI_QUEUE_MAX);
 802
 803     /* When deassigning, pass a consistent nvqs value
 804      * to avoid leaking notifiers.
 805      */
 806     assert(assign || nvqs == proxy->nvqs_with_notifiers);
 807
 808     proxy->nvqs_with_notifiers = nvqs;
 809
 810     /* Must unset vector notifier while guest notifier is still assigned */
 811     if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) {
 812         msix_unset_vector_notifiers(&proxy->pci_dev);
 813         if (proxy->vector_irqfd) {
 814             kvm_virtio_pci_vector_release(proxy, nvqs);
 815             g_free(proxy->vector_irqfd);
 816             proxy->vector_irqfd = NULL;
 817         }
 818     }
 819
 820     for (n = 0; n < nvqs; n++) {
 821         if (!virtio_queue_get_num(vdev, n)) {
 822             break;
 823         }
 824
 825         r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd);
 826         if (r < 0) {
 827             goto assign_error;
 828         }
 829     }
 830
 831     /* Must set vector notifier after guest notifier has been assigned */
 832     if ((with_irqfd || k->guest_notifier_mask) && assign) {
 833         if (with_irqfd) {
 834             proxy->vector_irqfd =
 835                 g_malloc0(sizeof(*proxy->vector_irqfd) *
 836                           msix_nr_vectors_allocated(&proxy->pci_dev));
 837             r = kvm_virtio_pci_vector_use(proxy, nvqs);
 838             if (r < 0) {
 839                 goto assign_error;
 840             }
 841         }
 842         r = msix_set_vector_notifiers(&proxy->pci_dev,
 843                                       virtio_pci_vector_unmask,
 844                                       virtio_pci_vector_mask,
 845                                       virtio_pci_vector_poll);
 846         if (r < 0) {
 847             goto notifiers_error;
 848         }
 849     }
 850
 851     return 0;
 852
 853 notifiers_error:
 854     if (with_irqfd) {
 855         assert(assign);
 856         kvm_virtio_pci_vector_release(proxy, nvqs);
 857     }
 858
 859 assign_error:
 860     /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
 861     assert(assign);
 862     while (--n >= 0) {
 863         virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd);
 864     }
 865     return r;
 866 }
 867
 868 static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign)
 869 {
 870     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 871
 872     /* Stop using ioeventfd for virtqueue kick if the device starts using host
 873      * notifiers.  This makes it easy to avoid stepping on each others' toes.
 874      */
 875     proxy->ioeventfd_disabled = assign;
 876     if (assign) {
 877         virtio_pci_stop_ioeventfd(proxy);
 878     }
 879     /* We don't need to start here: it's not needed because backend
 880      * currently only stops on status change away from ok,
 881      * reset, vmstop and such. If we do add code to start here,
 882      * need to check vmstate, device state etc. */
 883     return virtio_pci_set_host_notifier_internal(proxy, n, assign, false);
 884 }
 885
 886 static void virtio_pci_vmstate_change(DeviceState *d, bool running)
 887 {
 888     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 889     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 890
 891     if (running) {
 892         /* Linux before 2.6.34 drives the device without enabling
 893            the PCI device bus master bit. Enable it automatically
 894            for the guest. This is a PCI spec violation but so is
 895            initiating DMA with bus master bit clear.
 896            Note: this only makes a difference when migrating
 897            across QEMU versions from an old QEMU, as for new QEMU
 898            bus master and driver bits are always in sync.
 899            TODO: consider enabling conditionally for compat machine types. */
 900         if (vdev->status & (VIRTIO_CONFIG_S_ACKNOWLEDGE |
 901                             VIRTIO_CONFIG_S_DRIVER)) {
 902             pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
 903                                      proxy->pci_dev.config[PCI_COMMAND] |
 904                                      PCI_COMMAND_MASTER, 1);
 905         }
 906         virtio_pci_start_ioeventfd(proxy);
 907     } else {
 908         virtio_pci_stop_ioeventfd(proxy);
 909     }
 910 }
 911
 912 #ifdef CONFIG_VIRTFS
 913 static int virtio_9p_init_pci(VirtIOPCIProxy *vpci_dev)
 914 {
 915     V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev);
 916     DeviceState *vdev = DEVICE(&dev->vdev);
 917
 918     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
 919     if (qdev_init(vdev) < 0) {
 920         return -1;
 921     }
 922     return 0;
 923 }
 924
 925 static Property virtio_9p_pci_properties[] = {
 926     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
 927                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
 928     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
 929     DEFINE_VIRTIO_9P_PROPERTIES(V9fsPCIState, vdev.fsconf),
 930     DEFINE_PROP_END_OF_LIST(),
 931 };
 932
 933 static void virtio_9p_pci_class_init(ObjectClass *klass, void *data)
 934 {
 935     DeviceClass *dc = DEVICE_CLASS(klass);
 936     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
 937     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
 938
 939     k->init = virtio_9p_init_pci;
 940     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
 941     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P;
 942     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
 943     pcidev_k->class_id = 0x2;
 944     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 945     dc->props = virtio_9p_pci_properties;
 946 }
 947
 948 static void virtio_9p_pci_instance_init(Object *obj)
 949 {
 950     V9fsPCIState *dev = VIRTIO_9P_PCI(obj);
 951     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_9P);
 952     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 953 }
 954
 955 static const TypeInfo virtio_9p_pci_info = {
 956     .name          = TYPE_VIRTIO_9P_PCI,
 957     .parent        = TYPE_VIRTIO_PCI,
 958     .instance_size = sizeof(V9fsPCIState),
 959     .instance_init = virtio_9p_pci_instance_init,
 960     .class_init    = virtio_9p_pci_class_init,
 961 };
 962 #endif /* CONFIG_VIRTFS */
 963
 964 /*
 965  * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
 966  */
 967
 968 /* This is called by virtio-bus just after the device is plugged. */
 969 static void virtio_pci_device_plugged(DeviceState *d)
 970 {
 971     VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
 972     VirtioBusState *bus = &proxy->bus;
 973     uint8_t *config;
 974     uint32_t size;
 975
 976     config = proxy->pci_dev.config;
 977     if (proxy->class_code) {
 978         pci_config_set_class(config, proxy->class_code);
 979     }
 980     pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID,
 981                  pci_get_word(config + PCI_VENDOR_ID));
 982     pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
 983     config[PCI_INTERRUPT_PIN] = 1;
 984
 985     if (proxy->nvectors &&
 986         msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1)) {
 987         error_report("unable to init msix vectors to %" PRIu32,
 988                      proxy->nvectors);
 989         proxy->nvectors = 0;
 990     }
 991
 992     proxy->pci_dev.config_write = virtio_write_config;
 993
 994     size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev)
 995          + virtio_bus_get_vdev_config_len(bus);
 996     if (size & (size - 1)) {
 997         size = 1 << qemu_fls(size);
 998     }
 999
1000     memory_region_init_io(&proxy->bar, OBJECT(proxy), &virtio_pci_config_ops,
1001                           proxy, "virtio-pci", size);
1002     pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
1003                      &proxy->bar);
1004
1005     if (!kvm_has_many_ioeventfds()) {
1006         proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
1007     }
1008
1009     proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
1010     proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
1011     proxy->host_features = virtio_bus_get_vdev_features(bus,
1012                                                       proxy->host_features);
1013 }
1014
1015 static void virtio_pci_device_unplugged(DeviceState *d)
1016 {
1017     VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1018
1019     virtio_pci_stop_ioeventfd(proxy);
1020 }
1021
1022 static int virtio_pci_init(PCIDevice *pci_dev)
1023 {
1024     VirtIOPCIProxy *dev = VIRTIO_PCI(pci_dev);
1025     VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev);
1026     virtio_pci_bus_new(&dev->bus, sizeof(dev->bus), dev);
1027     if (k->init != NULL) {
1028         return k->init(dev);
1029     }
1030     return 0;
1031 }
1032
1033 static void virtio_pci_exit(PCIDevice *pci_dev)
1034 {
1035     msix_uninit_exclusive_bar(pci_dev);
1036 }
1037
1038 static void virtio_pci_reset(DeviceState *qdev)
1039 {
1040     VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1041     VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
1042     virtio_pci_stop_ioeventfd(proxy);
1043     virtio_bus_reset(bus);
1044     msix_unuse_all_vectors(&proxy->pci_dev);
1045 }
1046
1047 static Property virtio_pci_properties[] = {
1048     DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1049     DEFINE_PROP_END_OF_LIST(),
1050 };
1051
1052 static void virtio_pci_class_init(ObjectClass *klass, void *data)
1053 {
1054     DeviceClass *dc = DEVICE_CLASS(klass);
1055     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1056
1057     dc->props = virtio_pci_properties;
1058     k->init = virtio_pci_init;
1059     k->exit = virtio_pci_exit;
1060     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1061     k->revision = VIRTIO_PCI_ABI_VERSION;
1062     k->class_id = PCI_CLASS_OTHERS;
1063     dc->reset = virtio_pci_reset;
1064 }
1065
1066 static const TypeInfo virtio_pci_info = {
1067     .name          = TYPE_VIRTIO_PCI,
1068     .parent        = TYPE_PCI_DEVICE,
1069     .instance_size = sizeof(VirtIOPCIProxy),
1070     .class_init    = virtio_pci_class_init,
1071     .class_size    = sizeof(VirtioPCIClass),
1072     .abstract      = true,
1073 };
1074
1075 /* virtio-blk-pci */
1076
1077 static Property virtio_blk_pci_properties[] = {
1078     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1079     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1080                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1081     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1082     DEFINE_PROP_END_OF_LIST(),
1083 };
1084
1085 static int virtio_blk_pci_init(VirtIOPCIProxy *vpci_dev)
1086 {
1087     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
1088     DeviceState *vdev = DEVICE(&dev->vdev);
1089     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1090     if (qdev_init(vdev) < 0) {
1091         return -1;
1092     }
1093     return 0;
1094 }
1095
1096 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
1097 {
1098     DeviceClass *dc = DEVICE_CLASS(klass);
1099     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1100     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1101
1102     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1103     dc->props = virtio_blk_pci_properties;
1104     k->init = virtio_blk_pci_init;
1105     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1106     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
1107     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1108     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1109 }
1110
1111 static void virtio_blk_pci_instance_init(Object *obj)
1112 {
1113     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
1114     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BLK);
1115     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1116     object_unref(OBJECT(&dev->vdev));
1117     qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
1118     object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread",
1119                               &error_abort);
1120 }
1121
1122 static const TypeInfo virtio_blk_pci_info = {
1123     .name          = TYPE_VIRTIO_BLK_PCI,
1124     .parent        = TYPE_VIRTIO_PCI,
1125     .instance_size = sizeof(VirtIOBlkPCI),
1126     .instance_init = virtio_blk_pci_instance_init,
1127     .class_init    = virtio_blk_pci_class_init,
1128 };
1129
1130 /* virtio-scsi-pci */
1131
1132 static Property virtio_scsi_pci_properties[] = {
1133     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1134                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1135     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
1136                        DEV_NVECTORS_UNSPECIFIED),
1137     DEFINE_VIRTIO_SCSI_FEATURES(VirtIOPCIProxy, host_features),
1138     DEFINE_PROP_END_OF_LIST(),
1139 };
1140
1141 static int virtio_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev)
1142 {
1143     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
1144     DeviceState *vdev = DEVICE(&dev->vdev);
1145     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
1146     DeviceState *proxy = DEVICE(vpci_dev);
1147     char *bus_name;
1148
1149     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1150         vpci_dev->nvectors = vs->conf.num_queues + 3;
1151     }
1152
1153     /*
1154      * For command line compatibility, this sets the virtio-scsi-device bus
1155      * name as before.
1156      */
1157     if (proxy->id) {
1158         bus_name = g_strdup_printf("%s.0", proxy->id);
1159         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1160         g_free(bus_name);
1161     }
1162
1163     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1164     if (qdev_init(vdev) < 0) {
1165         return -1;
1166     }
1167     return 0;
1168 }
1169
1170 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
1171 {
1172     DeviceClass *dc = DEVICE_CLASS(klass);
1173     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1174     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1175     k->init = virtio_scsi_pci_init_pci;
1176     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1177     dc->props = virtio_scsi_pci_properties;
1178     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1179     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
1180     pcidev_k->revision = 0x00;
1181     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1182 }
1183
1184 static void virtio_scsi_pci_instance_init(Object *obj)
1185 {
1186     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
1187     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SCSI);
1188     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1189     object_unref(OBJECT(&dev->vdev));
1190     qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
1191 }
1192
1193 static const TypeInfo virtio_scsi_pci_info = {
1194     .name          = TYPE_VIRTIO_SCSI_PCI,
1195     .parent        = TYPE_VIRTIO_PCI,
1196     .instance_size = sizeof(VirtIOSCSIPCI),
1197     .instance_init = virtio_scsi_pci_instance_init,
1198     .class_init    = virtio_scsi_pci_class_init,
1199 };
1200
1201 /* vhost-scsi-pci */
1202
1203 #ifdef CONFIG_VHOST_SCSI
1204 static Property vhost_scsi_pci_properties[] = {
1205     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
1206                        DEV_NVECTORS_UNSPECIFIED),
1207     DEFINE_PROP_END_OF_LIST(),
1208 };
1209
1210 static int vhost_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev)
1211 {
1212     VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
1213     DeviceState *vdev = DEVICE(&dev->vdev);
1214     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
1215
1216     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1217         vpci_dev->nvectors = vs->conf.num_queues + 3;
1218     }
1219
1220     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1221     if (qdev_init(vdev) < 0) {
1222         return -1;
1223     }
1224     return 0;
1225 }
1226
1227 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data)
1228 {
1229     DeviceClass *dc = DEVICE_CLASS(klass);
1230     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1231     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1232     k->init = vhost_scsi_pci_init_pci;
1233     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1234     dc->props = vhost_scsi_pci_properties;
1235     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1236     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
1237     pcidev_k->revision = 0x00;
1238     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1239 }
1240
1241 static void vhost_scsi_pci_instance_init(Object *obj)
1242 {
1243     VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
1244     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VHOST_SCSI);
1245     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1246     object_unref(OBJECT(&dev->vdev));
1247     qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
1248 }
1249
1250 static const TypeInfo vhost_scsi_pci_info = {
1251     .name          = TYPE_VHOST_SCSI_PCI,
1252     .parent        = TYPE_VIRTIO_PCI,
1253     .instance_size = sizeof(VHostSCSIPCI),
1254     .instance_init = vhost_scsi_pci_instance_init,
1255     .class_init    = vhost_scsi_pci_class_init,
1256 };
1257 #endif
1258
1259 /* virtio-balloon-pci */
1260
1261 static void balloon_pci_stats_get_all(Object *obj, struct Visitor *v,
1262                                       void *opaque, const char *name,
1263                                       Error **errp)
1264 {
1265     VirtIOBalloonPCI *dev = opaque;
1266     object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp);
1267 }
1268
1269 static void balloon_pci_stats_get_poll_interval(Object *obj, struct Visitor *v,
1270                                                 void *opaque, const char *name,
1271                                                 Error **errp)
1272 {
1273     VirtIOBalloonPCI *dev = opaque;
1274     object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
1275                         errp);
1276 }
1277
1278 static void balloon_pci_stats_set_poll_interval(Object *obj, struct Visitor *v,
1279                                                 void *opaque, const char *name,
1280                                                 Error **errp)
1281 {
1282     VirtIOBalloonPCI *dev = opaque;
1283     object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
1284                         errp);
1285 }
1286
1287 static Property virtio_balloon_pci_properties[] = {
1288     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1289     DEFINE_PROP_END_OF_LIST(),
1290 };
1291
1292 static int virtio_balloon_pci_init(VirtIOPCIProxy *vpci_dev)
1293 {
1294     VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev);
1295     DeviceState *vdev = DEVICE(&dev->vdev);
1296
1297     if (vpci_dev->class_code != PCI_CLASS_OTHERS &&
1298         vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
1299         vpci_dev->class_code = PCI_CLASS_OTHERS;
1300     }
1301
1302     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1303     if (qdev_init(vdev) < 0) {
1304         return -1;
1305     }
1306     return 0;
1307 }
1308
1309 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data)
1310 {
1311     DeviceClass *dc = DEVICE_CLASS(klass);
1312     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1313     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1314     k->init = virtio_balloon_pci_init;
1315     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1316     dc->props = virtio_balloon_pci_properties;
1317     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1318     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON;
1319     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1320     pcidev_k->class_id = PCI_CLASS_OTHERS;
1321 }
1322
1323 static void virtio_balloon_pci_instance_init(Object *obj)
1324 {
1325     VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj);
1326     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BALLOON);
1327     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1328     object_unref(OBJECT(&dev->vdev));
1329     object_property_add(obj, "guest-stats", "guest statistics",
1330                         balloon_pci_stats_get_all, NULL, NULL, dev,
1331                         NULL);
1332
1333     object_property_add(obj, "guest-stats-polling-interval", "int",
1334                         balloon_pci_stats_get_poll_interval,
1335                         balloon_pci_stats_set_poll_interval,
1336                         NULL, dev, NULL);
1337 }
1338
1339 static const TypeInfo virtio_balloon_pci_info = {
1340     .name          = TYPE_VIRTIO_BALLOON_PCI,
1341     .parent        = TYPE_VIRTIO_PCI,
1342     .instance_size = sizeof(VirtIOBalloonPCI),
1343     .instance_init = virtio_balloon_pci_instance_init,
1344     .class_init    = virtio_balloon_pci_class_init,
1345 };
1346
1347 /* virtio-serial-pci */
1348
1349 static int virtio_serial_pci_init(VirtIOPCIProxy *vpci_dev)
1350 {
1351     VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev);
1352     DeviceState *vdev = DEVICE(&dev->vdev);
1353     DeviceState *proxy = DEVICE(vpci_dev);
1354     char *bus_name;
1355
1356     if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
1357         vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
1358         vpci_dev->class_code != PCI_CLASS_OTHERS) {        /* qemu-kvm  */
1359             vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER;
1360     }
1361
1362     /* backwards-compatibility with machines that were created with
1363        DEV_NVECTORS_UNSPECIFIED */
1364     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1365         vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1;
1366     }
1367
1368     /*
1369      * For command line compatibility, this sets the virtio-serial-device bus
1370      * name as before.
1371      */
1372     if (proxy->id) {
1373         bus_name = g_strdup_printf("%s.0", proxy->id);
1374         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1375         g_free(bus_name);
1376     }
1377
1378     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1379     if (qdev_init(vdev) < 0) {
1380         return -1;
1381     }
1382     return 0;
1383 }
1384
1385 static Property virtio_serial_pci_properties[] = {
1386     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1387                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1388     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1389     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1390     DEFINE_PROP_END_OF_LIST(),
1391 };
1392
1393 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data)
1394 {
1395     DeviceClass *dc = DEVICE_CLASS(klass);
1396     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1397     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1398     k->init = virtio_serial_pci_init;
1399     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
1400     dc->props = virtio_serial_pci_properties;
1401     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1402     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
1403     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1404     pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
1405 }
1406
1407 static void virtio_serial_pci_instance_init(Object *obj)
1408 {
1409     VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj);
1410     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL);
1411     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1412     qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
1413     object_unref(OBJECT(&dev->vdev));
1414 }
1415
1416 static const TypeInfo virtio_serial_pci_info = {
1417     .name          = TYPE_VIRTIO_SERIAL_PCI,
1418     .parent        = TYPE_VIRTIO_PCI,
1419     .instance_size = sizeof(VirtIOSerialPCI),
1420     .instance_init = virtio_serial_pci_instance_init,
1421     .class_init    = virtio_serial_pci_class_init,
1422 };
1423
1424 /* virtio-net-pci */
1425
1426 static Property virtio_net_properties[] = {
1427     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1428                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false),
1429     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
1430     DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features),
1431     DEFINE_PROP_END_OF_LIST(),
1432 };
1433
1434 static int virtio_net_pci_init(VirtIOPCIProxy *vpci_dev)
1435 {
1436     DeviceState *qdev = DEVICE(vpci_dev);
1437     VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev);
1438     DeviceState *vdev = DEVICE(&dev->vdev);
1439
1440     virtio_net_set_config_size(&dev->vdev, vpci_dev->host_features);
1441     virtio_net_set_netclient_name(&dev->vdev, qdev->id,
1442                                   object_get_typename(OBJECT(qdev)));
1443     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1444     if (qdev_init(vdev) < 0) {
1445         return -1;
1446     }
1447     return 0;
1448 }
1449
1450 static void virtio_net_pci_class_init(ObjectClass *klass, void *data)
1451 {
1452     DeviceClass *dc = DEVICE_CLASS(klass);
1453     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1454     VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
1455
1456     k->romfile = "efi-virtio.rom";
1457     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1458     k->device_id = PCI_DEVICE_ID_VIRTIO_NET;
1459     k->revision = VIRTIO_PCI_ABI_VERSION;
1460     k->class_id = PCI_CLASS_NETWORK_ETHERNET;
1461     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
1462     dc->props = virtio_net_properties;
1463     vpciklass->init = virtio_net_pci_init;
1464 }
1465
1466 static void virtio_net_pci_instance_init(Object *obj)
1467 {
1468     VirtIONetPCI *dev = VIRTIO_NET_PCI(obj);
1469     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_NET);
1470     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1471     object_unref(OBJECT(&dev->vdev));
1472     qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
1473 }
1474
1475 static const TypeInfo virtio_net_pci_info = {
1476     .name          = TYPE_VIRTIO_NET_PCI,
1477     .parent        = TYPE_VIRTIO_PCI,
1478     .instance_size = sizeof(VirtIONetPCI),
1479     .instance_init = virtio_net_pci_instance_init,
1480     .class_init    = virtio_net_pci_class_init,
1481 };
1482
1483 /* virtio-rng-pci */
1484
1485 static Property virtio_rng_pci_properties[] = {
1486     DEFINE_PROP_END_OF_LIST(),
1487 };
1488
1489 static int virtio_rng_pci_init(VirtIOPCIProxy *vpci_dev)
1490 {
1491     VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev);
1492     DeviceState *vdev = DEVICE(&vrng->vdev);
1493
1494     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1495     if (qdev_init(vdev) < 0) {
1496         return -1;
1497     }
1498
1499     object_property_set_link(OBJECT(vrng),
1500                              OBJECT(vrng->vdev.conf.rng), "rng",
1501                              NULL);
1502
1503     return 0;
1504 }
1505
1506 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data)
1507 {
1508     DeviceClass *dc = DEVICE_CLASS(klass);
1509     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1510     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1511
1512     k->init = virtio_rng_pci_init;
1513     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1514     dc->props = virtio_rng_pci_properties;
1515
1516     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1517     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG;
1518     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1519     pcidev_k->class_id = PCI_CLASS_OTHERS;
1520 }
1521
1522 static void virtio_rng_initfn(Object *obj)
1523 {
1524     VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj);
1525     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_RNG);
1526     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1527     qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
1528     object_unref(OBJECT(&dev->vdev));
1529     object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
1530                              (Object **)&dev->vdev.conf.rng,
1531                              qdev_prop_allow_set_link_before_realize,
1532                              OBJ_PROP_LINK_UNREF_ON_RELEASE, NULL);
1533
1534 }
1535
1536 static const TypeInfo virtio_rng_pci_info = {
1537     .name          = TYPE_VIRTIO_RNG_PCI,
1538     .parent        = TYPE_VIRTIO_PCI,
1539     .instance_size = sizeof(VirtIORngPCI),
1540     .instance_init = virtio_rng_initfn,
1541     .class_init    = virtio_rng_pci_class_init,
1542 };
1543
1544 /* virtio-pci-bus */
1545
1546 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
1547                                VirtIOPCIProxy *dev)
1548 {
1549     DeviceState *qdev = DEVICE(dev);
1550     BusState *qbus;
1551     char virtio_bus_name[] = "virtio-bus";
1552
1553     qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev,
1554                         virtio_bus_name);
1555     qbus = BUS(bus);
1556     qbus->allow_hotplug = 1;
1557 }
1558
1559 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
1560 {
1561     BusClass *bus_class = BUS_CLASS(klass);
1562     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1563     bus_class->max_dev = 1;
1564     k->notify = virtio_pci_notify;
1565     k->save_config = virtio_pci_save_config;
1566     k->load_config = virtio_pci_load_config;
1567     k->save_queue = virtio_pci_save_queue;
1568     k->load_queue = virtio_pci_load_queue;
1569     k->get_features = virtio_pci_get_features;
1570     k->query_guest_notifiers = virtio_pci_query_guest_notifiers;
1571     k->set_host_notifier = virtio_pci_set_host_notifier;
1572     k->set_guest_notifiers = virtio_pci_set_guest_notifiers;
1573     k->vmstate_change = virtio_pci_vmstate_change;
1574     k->device_plugged = virtio_pci_device_plugged;
1575     k->device_unplugged = virtio_pci_device_unplugged;
1576 }
1577
1578 static const TypeInfo virtio_pci_bus_info = {
1579     .name          = TYPE_VIRTIO_PCI_BUS,
1580     .parent        = TYPE_VIRTIO_BUS,
1581     .instance_size = sizeof(VirtioPCIBusState),
1582     .class_init    = virtio_pci_bus_class_init,
1583 };
1584
1585 static void virtio_pci_register_types(void)
1586 {
1587     type_register_static(&virtio_rng_pci_info);
1588     type_register_static(&virtio_pci_bus_info);
1589     type_register_static(&virtio_pci_info);
1590 #ifdef CONFIG_VIRTFS
1591     type_register_static(&virtio_9p_pci_info);
1592 #endif
1593     type_register_static(&virtio_blk_pci_info);
1594     type_register_static(&virtio_scsi_pci_info);
1595     type_register_static(&virtio_balloon_pci_info);
1596     type_register_static(&virtio_serial_pci_info);
1597     type_register_static(&virtio_net_pci_info);
1598 #ifdef CONFIG_VHOST_SCSI
1599     type_register_static(&vhost_scsi_pci_info);
1600 #endif
1601 }
1602
1603 type_init(virtio_pci_register_types)