hw/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 "virtio.h"
  21 #include "virtio-blk.h"
  22 #include "virtio-net.h"
  23 #include "virtio-serial.h"
  24 #include "virtio-scsi.h"
  25 #include "pci/pci.h"
  26 #include "qemu/error-report.h"
  27 #include "pci/msi.h"
  28 #include "pci/msix.h"
  29 #include "loader.h"
  30 #include "sysemu/kvm.h"
  31 #include "sysemu/blockdev.h"
  32 #include "virtio-pci.h"
  33 #include "qemu/range.h"
  34
  35 /* from Linux's linux/virtio_pci.h */
  36
  37 /* A 32-bit r/o bitmask of the features supported by the host */
  38 #define VIRTIO_PCI_HOST_FEATURES        0
  39
  40 /* A 32-bit r/w bitmask of features activated by the guest */
  41 #define VIRTIO_PCI_GUEST_FEATURES       4
  42
  43 /* A 32-bit r/w PFN for the currently selected queue */
  44 #define VIRTIO_PCI_QUEUE_PFN            8
  45
  46 /* A 16-bit r/o queue size for the currently selected queue */
  47 #define VIRTIO_PCI_QUEUE_NUM            12
  48
  49 /* A 16-bit r/w queue selector */
  50 #define VIRTIO_PCI_QUEUE_SEL            14
  51
  52 /* A 16-bit r/w queue notifier */
  53 #define VIRTIO_PCI_QUEUE_NOTIFY         16
  54
  55 /* An 8-bit device status register.  */
  56 #define VIRTIO_PCI_STATUS               18
  57
  58 /* An 8-bit r/o interrupt status register.  Reading the value will return the
  59  * current contents of the ISR and will also clear it.  This is effectively
  60  * a read-and-acknowledge. */
  61 #define VIRTIO_PCI_ISR                  19
  62
  63 /* MSI-X registers: only enabled if MSI-X is enabled. */
  64 /* A 16-bit vector for configuration changes. */
  65 #define VIRTIO_MSI_CONFIG_VECTOR        20
  66 /* A 16-bit vector for selected queue notifications. */
  67 #define VIRTIO_MSI_QUEUE_VECTOR         22
  68
  69 /* Config space size */
  70 #define VIRTIO_PCI_CONFIG_NOMSI         20
  71 #define VIRTIO_PCI_CONFIG_MSI           24
  72 #define VIRTIO_PCI_REGION_SIZE(dev)     (msix_present(dev) ? \
  73                                          VIRTIO_PCI_CONFIG_MSI : \
  74                                          VIRTIO_PCI_CONFIG_NOMSI)
  75
  76 /* The remaining space is defined by each driver as the per-driver
  77  * configuration space */
  78 #define VIRTIO_PCI_CONFIG(dev)          (msix_enabled(dev) ? \
  79                                          VIRTIO_PCI_CONFIG_MSI : \
  80                                          VIRTIO_PCI_CONFIG_NOMSI)
  81
  82 /* How many bits to shift physical queue address written to QUEUE_PFN.
  83  * 12 is historical, and due to x86 page size. */
  84 #define VIRTIO_PCI_QUEUE_ADDR_SHIFT    12
  85
  86 /* Flags track per-device state like workarounds for quirks in older guests. */
  87 #define VIRTIO_PCI_FLAG_BUS_MASTER_BUG  (1 << 0)
  88
  89 /* QEMU doesn't strictly need write barriers since everything runs in
  90  * lock-step.  We'll leave the calls to wmb() in though to make it obvious for
  91  * KVM or if kqemu gets SMP support.
  92  */
  93 #define wmb() do { } while (0)
  94
  95 /* HACK for virtio to determine if it's running a big endian guest */
  96 bool virtio_is_big_endian(void);
  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     if (msix_enabled(&proxy->pci_dev))
 117         msix_notify(&proxy->pci_dev, vector);
 118     else
 119         qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1);
 120 }
 121
 122 static void virtio_pci_save_config(DeviceState *d, QEMUFile *f)
 123 {
 124     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 125     pci_device_save(&proxy->pci_dev, f);
 126     msix_save(&proxy->pci_dev, f);
 127     if (msix_present(&proxy->pci_dev))
 128         qemu_put_be16(f, proxy->vdev->config_vector);
 129 }
 130
 131 static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f)
 132 {
 133     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 134     if (msix_present(&proxy->pci_dev))
 135         qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n));
 136 }
 137
 138 static int virtio_pci_load_config(DeviceState *d, QEMUFile *f)
 139 {
 140     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 141     int ret;
 142     ret = pci_device_load(&proxy->pci_dev, f);
 143     if (ret) {
 144         return ret;
 145     }
 146     msix_unuse_all_vectors(&proxy->pci_dev);
 147     msix_load(&proxy->pci_dev, f);
 148     if (msix_present(&proxy->pci_dev)) {
 149         qemu_get_be16s(f, &proxy->vdev->config_vector);
 150     } else {
 151         proxy->vdev->config_vector = VIRTIO_NO_VECTOR;
 152     }
 153     if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) {
 154         return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector);
 155     }
 156     return 0;
 157 }
 158
 159 static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f)
 160 {
 161     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 162     uint16_t vector;
 163     if (msix_present(&proxy->pci_dev)) {
 164         qemu_get_be16s(f, &vector);
 165     } else {
 166         vector = VIRTIO_NO_VECTOR;
 167     }
 168     virtio_queue_set_vector(proxy->vdev, n, vector);
 169     if (vector != VIRTIO_NO_VECTOR) {
 170         return msix_vector_use(&proxy->pci_dev, vector);
 171     }
 172     return 0;
 173 }
 174
 175 static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy,
 176                                                  int n, bool assign, bool set_handler)
 177 {
 178     VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
 179     EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
 180     int r = 0;
 181
 182     if (assign) {
 183         r = event_notifier_init(notifier, 1);
 184         if (r < 0) {
 185             error_report("%s: unable to init event notifier: %d",
 186                          __func__, r);
 187             return r;
 188         }
 189         virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
 190         memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
 191                                   true, n, notifier);
 192     } else {
 193         memory_region_del_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
 194                                   true, n, notifier);
 195         virtio_queue_set_host_notifier_fd_handler(vq, false, false);
 196         event_notifier_cleanup(notifier);
 197     }
 198     return r;
 199 }
 200
 201 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
 202 {
 203     int n, r;
 204
 205     if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) ||
 206         proxy->ioeventfd_disabled ||
 207         proxy->ioeventfd_started) {
 208         return;
 209     }
 210
 211     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 212         if (!virtio_queue_get_num(proxy->vdev, n)) {
 213             continue;
 214         }
 215
 216         r = virtio_pci_set_host_notifier_internal(proxy, n, true, true);
 217         if (r < 0) {
 218             goto assign_error;
 219         }
 220     }
 221     proxy->ioeventfd_started = true;
 222     return;
 223
 224 assign_error:
 225     while (--n >= 0) {
 226         if (!virtio_queue_get_num(proxy->vdev, n)) {
 227             continue;
 228         }
 229
 230         r = virtio_pci_set_host_notifier_internal(proxy, n, false, false);
 231         assert(r >= 0);
 232     }
 233     proxy->ioeventfd_started = false;
 234     error_report("%s: failed. Fallback to a userspace (slower).", __func__);
 235 }
 236
 237 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
 238 {
 239     int r;
 240     int n;
 241
 242     if (!proxy->ioeventfd_started) {
 243         return;
 244     }
 245
 246     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 247         if (!virtio_queue_get_num(proxy->vdev, n)) {
 248             continue;
 249         }
 250
 251         r = virtio_pci_set_host_notifier_internal(proxy, n, false, false);
 252         assert(r >= 0);
 253     }
 254     proxy->ioeventfd_started = false;
 255 }
 256
 257 void virtio_pci_reset(DeviceState *d)
 258 {
 259     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 260     virtio_pci_stop_ioeventfd(proxy);
 261     virtio_reset(proxy->vdev);
 262     msix_unuse_all_vectors(&proxy->pci_dev);
 263     proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
 264 }
 265
 266 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 267 {
 268     VirtIOPCIProxy *proxy = opaque;
 269     VirtIODevice *vdev = proxy->vdev;
 270     hwaddr pa;
 271
 272     switch (addr) {
 273     case VIRTIO_PCI_GUEST_FEATURES:
 274         /* Guest does not negotiate properly?  We have to assume nothing. */
 275         if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
 276             val = vdev->bad_features ? vdev->bad_features(vdev) : 0;
 277         }
 278         virtio_set_features(vdev, val);
 279         break;
 280     case VIRTIO_PCI_QUEUE_PFN:
 281         pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 282         if (pa == 0) {
 283             virtio_pci_stop_ioeventfd(proxy);
 284             virtio_reset(proxy->vdev);
 285             msix_unuse_all_vectors(&proxy->pci_dev);
 286         }
 287         else
 288             virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
 289         break;
 290     case VIRTIO_PCI_QUEUE_SEL:
 291         if (val < VIRTIO_PCI_QUEUE_MAX)
 292             vdev->queue_sel = val;
 293         break;
 294     case VIRTIO_PCI_QUEUE_NOTIFY:
 295         if (val < VIRTIO_PCI_QUEUE_MAX) {
 296             virtio_queue_notify(vdev, val);
 297         }
 298         break;
 299     case VIRTIO_PCI_STATUS:
 300         if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
 301             virtio_pci_stop_ioeventfd(proxy);
 302         }
 303
 304         virtio_set_status(vdev, val & 0xFF);
 305
 306         if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
 307             virtio_pci_start_ioeventfd(proxy);
 308         }
 309
 310         if (vdev->status == 0) {
 311             virtio_reset(proxy->vdev);
 312             msix_unuse_all_vectors(&proxy->pci_dev);
 313         }
 314
 315         /* Linux before 2.6.34 sets the device as OK without enabling
 316            the PCI device bus master bit. In this case we need to disable
 317            some safety checks. */
 318         if ((val & VIRTIO_CONFIG_S_DRIVER_OK) &&
 319             !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 320             proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
 321         }
 322         break;
 323     case VIRTIO_MSI_CONFIG_VECTOR:
 324         msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
 325         /* Make it possible for guest to discover an error took place. */
 326         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 327             val = VIRTIO_NO_VECTOR;
 328         vdev->config_vector = val;
 329         break;
 330     case VIRTIO_MSI_QUEUE_VECTOR:
 331         msix_vector_unuse(&proxy->pci_dev,
 332                           virtio_queue_vector(vdev, vdev->queue_sel));
 333         /* Make it possible for guest to discover an error took place. */
 334         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 335             val = VIRTIO_NO_VECTOR;
 336         virtio_queue_set_vector(vdev, vdev->queue_sel, val);
 337         break;
 338     default:
 339         error_report("%s: unexpected address 0x%x value 0x%x",
 340                      __func__, addr, val);
 341         break;
 342     }
 343 }
 344
 345 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
 346 {
 347     VirtIODevice *vdev = proxy->vdev;
 348     uint32_t ret = 0xFFFFFFFF;
 349
 350     switch (addr) {
 351     case VIRTIO_PCI_HOST_FEATURES:
 352         ret = proxy->host_features;
 353         break;
 354     case VIRTIO_PCI_GUEST_FEATURES:
 355         ret = vdev->guest_features;
 356         break;
 357     case VIRTIO_PCI_QUEUE_PFN:
 358         ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
 359               >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 360         break;
 361     case VIRTIO_PCI_QUEUE_NUM:
 362         ret = virtio_queue_get_num(vdev, vdev->queue_sel);
 363         break;
 364     case VIRTIO_PCI_QUEUE_SEL:
 365         ret = vdev->queue_sel;
 366         break;
 367     case VIRTIO_PCI_STATUS:
 368         ret = vdev->status;
 369         break;
 370     case VIRTIO_PCI_ISR:
 371         /* reading from the ISR also clears it. */
 372         ret = vdev->isr;
 373         vdev->isr = 0;
 374         qemu_set_irq(proxy->pci_dev.irq[0], 0);
 375         break;
 376     case VIRTIO_MSI_CONFIG_VECTOR:
 377         ret = vdev->config_vector;
 378         break;
 379     case VIRTIO_MSI_QUEUE_VECTOR:
 380         ret = virtio_queue_vector(vdev, vdev->queue_sel);
 381         break;
 382     default:
 383         break;
 384     }
 385
 386     return ret;
 387 }
 388
 389 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr,
 390                                        unsigned size)
 391 {
 392     VirtIOPCIProxy *proxy = opaque;
 393     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 394     uint64_t val = 0;
 395     if (addr < config) {
 396         return virtio_ioport_read(proxy, addr);
 397     }
 398     addr -= config;
 399
 400     switch (size) {
 401     case 1:
 402         val = virtio_config_readb(proxy->vdev, addr);
 403         break;
 404     case 2:
 405         val = virtio_config_readw(proxy->vdev, addr);
 406         if (virtio_is_big_endian()) {
 407             val = bswap16(val);
 408         }
 409         break;
 410     case 4:
 411         val = virtio_config_readl(proxy->vdev, addr);
 412         if (virtio_is_big_endian()) {
 413             val = bswap32(val);
 414         }
 415         break;
 416     }
 417     return val;
 418 }
 419
 420 static void virtio_pci_config_write(void *opaque, hwaddr addr,
 421                                     uint64_t val, unsigned size)
 422 {
 423     VirtIOPCIProxy *proxy = opaque;
 424     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 425     if (addr < config) {
 426         virtio_ioport_write(proxy, addr, val);
 427         return;
 428     }
 429     addr -= config;
 430     /*
 431      * Virtio-PCI is odd. Ioports are LE but config space is target native
 432      * endian.
 433      */
 434     switch (size) {
 435     case 1:
 436         virtio_config_writeb(proxy->vdev, addr, val);
 437         break;
 438     case 2:
 439         if (virtio_is_big_endian()) {
 440             val = bswap16(val);
 441         }
 442         virtio_config_writew(proxy->vdev, addr, val);
 443         break;
 444     case 4:
 445         if (virtio_is_big_endian()) {
 446             val = bswap32(val);
 447         }
 448         virtio_config_writel(proxy->vdev, addr, val);
 449         break;
 450     }
 451 }
 452
 453 static const MemoryRegionOps virtio_pci_config_ops = {
 454     .read = virtio_pci_config_read,
 455     .write = virtio_pci_config_write,
 456     .impl = {
 457         .min_access_size = 1,
 458         .max_access_size = 4,
 459     },
 460     .endianness = DEVICE_LITTLE_ENDIAN,
 461 };
 462
 463 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
 464                                 uint32_t val, int len)
 465 {
 466     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 467
 468     pci_default_write_config(pci_dev, address, val, len);
 469
 470     if (range_covers_byte(address, len, PCI_COMMAND) &&
 471         !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) &&
 472         !(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) {
 473         virtio_pci_stop_ioeventfd(proxy);
 474         virtio_set_status(proxy->vdev,
 475                           proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
 476     }
 477 }
 478
 479 static unsigned virtio_pci_get_features(DeviceState *d)
 480 {
 481     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 482     return proxy->host_features;
 483 }
 484
 485 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
 486                                         unsigned int queue_no,
 487                                         unsigned int vector,
 488                                         MSIMessage msg)
 489 {
 490     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 491     int ret;
 492
 493     if (irqfd->users == 0) {
 494         ret = kvm_irqchip_add_msi_route(kvm_state, msg);
 495         if (ret < 0) {
 496             return ret;
 497         }
 498         irqfd->virq = ret;
 499     }
 500     irqfd->users++;
 501     return 0;
 502 }
 503
 504 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy,
 505                                              unsigned int vector)
 506 {
 507     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 508     if (--irqfd->users == 0) {
 509         kvm_irqchip_release_virq(kvm_state, irqfd->virq);
 510     }
 511 }
 512
 513 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy,
 514                                  unsigned int queue_no,
 515                                  unsigned int vector)
 516 {
 517     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 518     VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no);
 519     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 520     int ret;
 521     ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, irqfd->virq);
 522     return ret;
 523 }
 524
 525 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
 526                                       unsigned int queue_no,
 527                                       unsigned int vector)
 528 {
 529     VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no);
 530     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 531     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 532     int ret;
 533
 534     ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq);
 535     assert(ret == 0);
 536 }
 537
 538 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
 539 {
 540     PCIDevice *dev = &proxy->pci_dev;
 541     VirtIODevice *vdev = proxy->vdev;
 542     unsigned int vector;
 543     int ret, queue_no;
 544     MSIMessage msg;
 545
 546     for (queue_no = 0; queue_no < nvqs; queue_no++) {
 547         if (!virtio_queue_get_num(vdev, queue_no)) {
 548             break;
 549         }
 550         vector = virtio_queue_vector(vdev, queue_no);
 551         if (vector >= msix_nr_vectors_allocated(dev)) {
 552             continue;
 553         }
 554         msg = msix_get_message(dev, vector);
 555         ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg);
 556         if (ret < 0) {
 557             goto undo;
 558         }
 559         /* If guest supports masking, set up irqfd now.
 560          * Otherwise, delay until unmasked in the frontend.
 561          */
 562         if (proxy->vdev->guest_notifier_mask) {
 563             ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
 564             if (ret < 0) {
 565                 kvm_virtio_pci_vq_vector_release(proxy, vector);
 566                 goto undo;
 567             }
 568         }
 569     }
 570     return 0;
 571
 572 undo:
 573     while (--queue_no >= 0) {
 574         vector = virtio_queue_vector(vdev, queue_no);
 575         if (vector >= msix_nr_vectors_allocated(dev)) {
 576             continue;
 577         }
 578         if (proxy->vdev->guest_notifier_mask) {
 579             kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 580         }
 581         kvm_virtio_pci_vq_vector_release(proxy, vector);
 582     }
 583     return ret;
 584 }
 585
 586 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
 587 {
 588     PCIDevice *dev = &proxy->pci_dev;
 589     VirtIODevice *vdev = proxy->vdev;
 590     unsigned int vector;
 591     int queue_no;
 592
 593     for (queue_no = 0; queue_no < nvqs; queue_no++) {
 594         if (!virtio_queue_get_num(vdev, queue_no)) {
 595             break;
 596         }
 597         vector = virtio_queue_vector(vdev, queue_no);
 598         if (vector >= msix_nr_vectors_allocated(dev)) {
 599             continue;
 600         }
 601         /* If guest supports masking, clean up irqfd now.
 602          * Otherwise, it was cleaned when masked in the frontend.
 603          */
 604         if (proxy->vdev->guest_notifier_mask) {
 605             kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 606         }
 607         kvm_virtio_pci_vq_vector_release(proxy, vector);
 608     }
 609 }
 610
 611 static int kvm_virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
 612                                         unsigned int queue_no,
 613                                         unsigned int vector,
 614                                         MSIMessage msg)
 615 {
 616     VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no);
 617     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 618     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 619     int ret = 0;
 620
 621     if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) {
 622         ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg);
 623         if (ret < 0) {
 624             return ret;
 625         }
 626     }
 627
 628     /* If guest supports masking, irqfd is already setup, unmask it.
 629      * Otherwise, set it up now.
 630      */
 631     if (proxy->vdev->guest_notifier_mask) {
 632         proxy->vdev->guest_notifier_mask(proxy->vdev, queue_no, false);
 633         /* Test after unmasking to avoid losing events. */
 634         if (proxy->vdev->guest_notifier_pending &&
 635             proxy->vdev->guest_notifier_pending(proxy->vdev, queue_no)) {
 636             event_notifier_set(n);
 637         }
 638     } else {
 639         ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
 640     }
 641     return ret;
 642 }
 643
 644 static void kvm_virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy,
 645                                              unsigned int queue_no,
 646                                              unsigned int vector)
 647 {
 648     /* If guest supports masking, keep irqfd but mask it.
 649      * Otherwise, clean it up now.
 650      */
 651     if (proxy->vdev->guest_notifier_mask) {
 652         proxy->vdev->guest_notifier_mask(proxy->vdev, queue_no, true);
 653     } else {
 654         kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 655     }
 656 }
 657
 658 static int kvm_virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
 659                                      MSIMessage msg)
 660 {
 661     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 662     VirtIODevice *vdev = proxy->vdev;
 663     int ret, queue_no;
 664
 665     for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
 666         if (!virtio_queue_get_num(vdev, queue_no)) {
 667             break;
 668         }
 669         if (virtio_queue_vector(vdev, queue_no) != vector) {
 670             continue;
 671         }
 672         ret = kvm_virtio_pci_vq_vector_unmask(proxy, queue_no, vector, msg);
 673         if (ret < 0) {
 674             goto undo;
 675         }
 676     }
 677     return 0;
 678
 679 undo:
 680     while (--queue_no >= 0) {
 681         if (virtio_queue_vector(vdev, queue_no) != vector) {
 682             continue;
 683         }
 684         kvm_virtio_pci_vq_vector_mask(proxy, queue_no, vector);
 685     }
 686     return ret;
 687 }
 688
 689 static void kvm_virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
 690 {
 691     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 692     VirtIODevice *vdev = proxy->vdev;
 693     int queue_no;
 694
 695     for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
 696         if (!virtio_queue_get_num(vdev, queue_no)) {
 697             break;
 698         }
 699         if (virtio_queue_vector(vdev, queue_no) != vector) {
 700             continue;
 701         }
 702         kvm_virtio_pci_vq_vector_mask(proxy, queue_no, vector);
 703     }
 704 }
 705
 706 static void kvm_virtio_pci_vector_poll(PCIDevice *dev,
 707                                        unsigned int vector_start,
 708                                        unsigned int vector_end)
 709 {
 710     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 711     VirtIODevice *vdev = proxy->vdev;
 712     int queue_no;
 713     unsigned int vector;
 714     EventNotifier *notifier;
 715     VirtQueue *vq;
 716
 717     for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
 718         if (!virtio_queue_get_num(vdev, queue_no)) {
 719             break;
 720         }
 721         vector = virtio_queue_vector(vdev, queue_no);
 722         if (vector < vector_start || vector >= vector_end ||
 723             !msix_is_masked(dev, vector)) {
 724             continue;
 725         }
 726         vq = virtio_get_queue(vdev, queue_no);
 727         notifier = virtio_queue_get_guest_notifier(vq);
 728         if (vdev->guest_notifier_pending) {
 729             if (vdev->guest_notifier_pending(vdev, queue_no)) {
 730                 msix_set_pending(dev, vector);
 731             }
 732         } else if (event_notifier_test_and_clear(notifier)) {
 733             msix_set_pending(dev, vector);
 734         }
 735     }
 736 }
 737
 738 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
 739                                          bool with_irqfd)
 740 {
 741     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 742     VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
 743     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 744
 745     if (assign) {
 746         int r = event_notifier_init(notifier, 0);
 747         if (r < 0) {
 748             return r;
 749         }
 750         virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
 751     } else {
 752         virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
 753         event_notifier_cleanup(notifier);
 754     }
 755
 756     return 0;
 757 }
 758
 759 static bool virtio_pci_query_guest_notifiers(DeviceState *d)
 760 {
 761     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 762     return msix_enabled(&proxy->pci_dev);
 763 }
 764
 765 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
 766 {
 767     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 768     VirtIODevice *vdev = proxy->vdev;
 769     int r, n;
 770     bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
 771         kvm_msi_via_irqfd_enabled();
 772
 773     nvqs = MIN(nvqs, VIRTIO_PCI_QUEUE_MAX);
 774
 775     /* When deassigning, pass a consistent nvqs value
 776      * to avoid leaking notifiers.
 777      */
 778     assert(assign || nvqs == proxy->nvqs_with_notifiers);
 779
 780     proxy->nvqs_with_notifiers = nvqs;
 781
 782     /* Must unset vector notifier while guest notifier is still assigned */
 783     if (proxy->vector_irqfd && !assign) {
 784         msix_unset_vector_notifiers(&proxy->pci_dev);
 785         kvm_virtio_pci_vector_release(proxy, nvqs);
 786         g_free(proxy->vector_irqfd);
 787         proxy->vector_irqfd = NULL;
 788     }
 789
 790     for (n = 0; n < nvqs; n++) {
 791         if (!virtio_queue_get_num(vdev, n)) {
 792             break;
 793         }
 794
 795         r = virtio_pci_set_guest_notifier(d, n, assign,
 796                                           kvm_msi_via_irqfd_enabled());
 797         if (r < 0) {
 798             goto assign_error;
 799         }
 800     }
 801
 802     /* Must set vector notifier after guest notifier has been assigned */
 803     if (with_irqfd && assign) {
 804         proxy->vector_irqfd =
 805             g_malloc0(sizeof(*proxy->vector_irqfd) *
 806                       msix_nr_vectors_allocated(&proxy->pci_dev));
 807         r = kvm_virtio_pci_vector_use(proxy, nvqs);
 808         if (r < 0) {
 809             goto assign_error;
 810         }
 811         r = msix_set_vector_notifiers(&proxy->pci_dev,
 812                                       kvm_virtio_pci_vector_unmask,
 813                                       kvm_virtio_pci_vector_mask,
 814                                       kvm_virtio_pci_vector_poll);
 815         if (r < 0) {
 816             goto notifiers_error;
 817         }
 818     }
 819
 820     return 0;
 821
 822 notifiers_error:
 823     assert(assign);
 824     kvm_virtio_pci_vector_release(proxy, nvqs);
 825
 826 assign_error:
 827     /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
 828     assert(assign);
 829     while (--n >= 0) {
 830         virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd);
 831     }
 832     return r;
 833 }
 834
 835 static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign)
 836 {
 837     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 838
 839     /* Stop using ioeventfd for virtqueue kick if the device starts using host
 840      * notifiers.  This makes it easy to avoid stepping on each others' toes.
 841      */
 842     proxy->ioeventfd_disabled = assign;
 843     if (assign) {
 844         virtio_pci_stop_ioeventfd(proxy);
 845     }
 846     /* We don't need to start here: it's not needed because backend
 847      * currently only stops on status change away from ok,
 848      * reset, vmstop and such. If we do add code to start here,
 849      * need to check vmstate, device state etc. */
 850     return virtio_pci_set_host_notifier_internal(proxy, n, assign, false);
 851 }
 852
 853 static void virtio_pci_vmstate_change(DeviceState *d, bool running)
 854 {
 855     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 856
 857     if (running) {
 858         /* Try to find out if the guest has bus master disabled, but is
 859            in ready state. Then we have a buggy guest OS. */
 860         if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
 861             !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 862             proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
 863         }
 864         virtio_pci_start_ioeventfd(proxy);
 865     } else {
 866         virtio_pci_stop_ioeventfd(proxy);
 867     }
 868 }
 869
 870 static const VirtIOBindings virtio_pci_bindings = {
 871     .notify = virtio_pci_notify,
 872     .save_config = virtio_pci_save_config,
 873     .load_config = virtio_pci_load_config,
 874     .save_queue = virtio_pci_save_queue,
 875     .load_queue = virtio_pci_load_queue,
 876     .get_features = virtio_pci_get_features,
 877     .query_guest_notifiers = virtio_pci_query_guest_notifiers,
 878     .set_host_notifier = virtio_pci_set_host_notifier,
 879     .set_guest_notifiers = virtio_pci_set_guest_notifiers,
 880     .vmstate_change = virtio_pci_vmstate_change,
 881 };
 882
 883 void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev)
 884 {
 885     uint8_t *config;
 886     uint32_t size;
 887
 888     proxy->vdev = vdev;
 889
 890     config = proxy->pci_dev.config;
 891
 892     if (proxy->class_code) {
 893         pci_config_set_class(config, proxy->class_code);
 894     }
 895     pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID,
 896                  pci_get_word(config + PCI_VENDOR_ID));
 897     pci_set_word(config + PCI_SUBSYSTEM_ID, vdev->device_id);
 898     config[PCI_INTERRUPT_PIN] = 1;
 899
 900     if (vdev->nvectors &&
 901         msix_init_exclusive_bar(&proxy->pci_dev, vdev->nvectors, 1)) {
 902         vdev->nvectors = 0;
 903     }
 904
 905     proxy->pci_dev.config_write = virtio_write_config;
 906
 907     size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len;
 908     if (size & (size-1))
 909         size = 1 << qemu_fls(size);
 910
 911     memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy,
 912                           "virtio-pci", size);
 913     pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
 914                      &proxy->bar);
 915
 916     if (!kvm_has_many_ioeventfds()) {
 917         proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
 918     }
 919
 920     virtio_bind_device(vdev, &virtio_pci_bindings, DEVICE(proxy));
 921     proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
 922     proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
 923     proxy->host_features = vdev->get_features(vdev, proxy->host_features);
 924 }
 925
 926 static int virtio_blk_init_pci(PCIDevice *pci_dev)
 927 {
 928     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 929     VirtIODevice *vdev;
 930
 931     if (proxy->class_code != PCI_CLASS_STORAGE_SCSI &&
 932         proxy->class_code != PCI_CLASS_STORAGE_OTHER)
 933         proxy->class_code = PCI_CLASS_STORAGE_SCSI;
 934
 935     vdev = virtio_blk_init(&pci_dev->qdev, &proxy->blk);
 936     if (!vdev) {
 937         return -1;
 938     }
 939     vdev->nvectors = proxy->nvectors;
 940     virtio_init_pci(proxy, vdev);
 941     /* make the actual value visible */
 942     proxy->nvectors = vdev->nvectors;
 943     return 0;
 944 }
 945
 946 static void virtio_exit_pci(PCIDevice *pci_dev)
 947 {
 948     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 949
 950     memory_region_destroy(&proxy->bar);
 951     msix_uninit_exclusive_bar(pci_dev);
 952 }
 953
 954 static void virtio_blk_exit_pci(PCIDevice *pci_dev)
 955 {
 956     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 957
 958     virtio_pci_stop_ioeventfd(proxy);
 959     virtio_blk_exit(proxy->vdev);
 960     virtio_exit_pci(pci_dev);
 961 }
 962
 963 static int virtio_serial_init_pci(PCIDevice *pci_dev)
 964 {
 965     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 966     VirtIODevice *vdev;
 967
 968     if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
 969         proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
 970         proxy->class_code != PCI_CLASS_OTHERS)          /* qemu-kvm  */
 971         proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER;
 972
 973     vdev = virtio_serial_init(&pci_dev->qdev, &proxy->serial);
 974     if (!vdev) {
 975         return -1;
 976     }
 977     vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED
 978                                         ? proxy->serial.max_virtserial_ports + 1
 979                                         : proxy->nvectors;
 980     virtio_init_pci(proxy, vdev);
 981     proxy->nvectors = vdev->nvectors;
 982     return 0;
 983 }
 984
 985 static void virtio_serial_exit_pci(PCIDevice *pci_dev)
 986 {
 987     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 988
 989     virtio_pci_stop_ioeventfd(proxy);
 990     virtio_serial_exit(proxy->vdev);
 991     virtio_exit_pci(pci_dev);
 992 }
 993
 994 static int virtio_net_init_pci(PCIDevice *pci_dev)
 995 {
 996     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 997     VirtIODevice *vdev;
 998
 999     vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic, &proxy->net);
1000
1001     vdev->nvectors = proxy->nvectors;
1002     virtio_init_pci(proxy, vdev);
1003
1004     /* make the actual value visible */
1005     proxy->nvectors = vdev->nvectors;
1006     return 0;
1007 }
1008
1009 static void virtio_net_exit_pci(PCIDevice *pci_dev)
1010 {
1011     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
1012
1013     virtio_pci_stop_ioeventfd(proxy);
1014     virtio_net_exit(proxy->vdev);
1015     virtio_exit_pci(pci_dev);
1016 }
1017
1018 static int virtio_balloon_init_pci(PCIDevice *pci_dev)
1019 {
1020     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
1021     VirtIODevice *vdev;
1022
1023     if (proxy->class_code != PCI_CLASS_OTHERS &&
1024         proxy->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
1025         proxy->class_code = PCI_CLASS_OTHERS;
1026     }
1027
1028     vdev = virtio_balloon_init(&pci_dev->qdev);
1029     if (!vdev) {
1030         return -1;
1031     }
1032     virtio_init_pci(proxy, vdev);
1033     return 0;
1034 }
1035
1036 static void virtio_balloon_exit_pci(PCIDevice *pci_dev)
1037 {
1038     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
1039
1040     virtio_pci_stop_ioeventfd(proxy);
1041     virtio_balloon_exit(proxy->vdev);
1042     virtio_exit_pci(pci_dev);
1043 }
1044
1045 static int virtio_rng_init_pci(PCIDevice *pci_dev)
1046 {
1047     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
1048     VirtIODevice *vdev;
1049
1050     if (proxy->rng.rng == NULL) {
1051         proxy->rng.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM));
1052
1053         object_property_add_child(OBJECT(pci_dev),
1054                                   "default-backend",
1055                                   OBJECT(proxy->rng.default_backend),
1056                                   NULL);
1057
1058         object_property_set_link(OBJECT(pci_dev),
1059                                  OBJECT(proxy->rng.default_backend),
1060                                  "rng", NULL);
1061     }
1062
1063     vdev = virtio_rng_init(&pci_dev->qdev, &proxy->rng);
1064     if (!vdev) {
1065         return -1;
1066     }
1067     virtio_init_pci(proxy, vdev);
1068     return 0;
1069 }
1070
1071 static void virtio_rng_exit_pci(PCIDevice *pci_dev)
1072 {
1073     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
1074
1075     virtio_pci_stop_ioeventfd(proxy);
1076     virtio_rng_exit(proxy->vdev);
1077     virtio_exit_pci(pci_dev);
1078 }
1079
1080 static Property virtio_blk_properties[] = {
1081     DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
1082     DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, blk.conf),
1083     DEFINE_BLOCK_CHS_PROPERTIES(VirtIOPCIProxy, blk.conf),
1084     DEFINE_PROP_STRING("serial", VirtIOPCIProxy, blk.serial),
1085 #ifdef __linux__
1086     DEFINE_PROP_BIT("scsi", VirtIOPCIProxy, blk.scsi, 0, true),
1087 #endif
1088     DEFINE_PROP_BIT("config-wce", VirtIOPCIProxy, blk.config_wce, 0, true),
1089     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1090 #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
1091     DEFINE_PROP_BIT("x-data-plane", VirtIOPCIProxy, blk.data_plane, 0, false),
1092 #endif
1093     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1094     DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features),
1095     DEFINE_PROP_END_OF_LIST(),
1096 };
1097
1098 static void virtio_blk_class_init(ObjectClass *klass, void *data)
1099 {
1100     DeviceClass *dc = DEVICE_CLASS(klass);
1101     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1102
1103     k->init = virtio_blk_init_pci;
1104     k->exit = virtio_blk_exit_pci;
1105     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1106     k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
1107     k->revision = VIRTIO_PCI_ABI_VERSION;
1108     k->class_id = PCI_CLASS_STORAGE_SCSI;
1109     dc->reset = virtio_pci_reset;
1110     dc->props = virtio_blk_properties;
1111 }
1112
1113 static const TypeInfo virtio_blk_info = {
1114     .name          = "virtio-blk-pci",
1115     .parent        = TYPE_PCI_DEVICE,
1116     .instance_size = sizeof(VirtIOPCIProxy),
1117     .class_init    = virtio_blk_class_init,
1118 };
1119
1120 static Property virtio_net_properties[] = {
1121     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false),
1122     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
1123     DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features),
1124     DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic),
1125     DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy, net.txtimer, TX_TIMER_INTERVAL),
1126     DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy, net.txburst, TX_BURST),
1127     DEFINE_PROP_STRING("tx", VirtIOPCIProxy, net.tx),
1128     DEFINE_PROP_END_OF_LIST(),
1129 };
1130
1131 static void virtio_net_class_init(ObjectClass *klass, void *data)
1132 {
1133     DeviceClass *dc = DEVICE_CLASS(klass);
1134     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1135
1136     k->init = virtio_net_init_pci;
1137     k->exit = virtio_net_exit_pci;
1138     k->romfile = "pxe-virtio.rom";
1139     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1140     k->device_id = PCI_DEVICE_ID_VIRTIO_NET;
1141     k->revision = VIRTIO_PCI_ABI_VERSION;
1142     k->class_id = PCI_CLASS_NETWORK_ETHERNET;
1143     dc->reset = virtio_pci_reset;
1144     dc->props = virtio_net_properties;
1145 }
1146
1147 static const TypeInfo virtio_net_info = {
1148     .name          = "virtio-net-pci",
1149     .parent        = TYPE_PCI_DEVICE,
1150     .instance_size = sizeof(VirtIOPCIProxy),
1151     .class_init    = virtio_net_class_init,
1152 };
1153
1154 static Property virtio_serial_properties[] = {
1155     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1156     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED),
1157     DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
1158     DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1159     DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, serial.max_virtserial_ports, 31),
1160     DEFINE_PROP_END_OF_LIST(),
1161 };
1162
1163 static void virtio_serial_class_init(ObjectClass *klass, void *data)
1164 {
1165     DeviceClass *dc = DEVICE_CLASS(klass);
1166     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1167
1168     k->init = virtio_serial_init_pci;
1169     k->exit = virtio_serial_exit_pci;
1170     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1171     k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
1172     k->revision = VIRTIO_PCI_ABI_VERSION;
1173     k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
1174     dc->reset = virtio_pci_reset;
1175     dc->props = virtio_serial_properties;
1176 }
1177
1178 static const TypeInfo virtio_serial_info = {
1179     .name          = "virtio-serial-pci",
1180     .parent        = TYPE_PCI_DEVICE,
1181     .instance_size = sizeof(VirtIOPCIProxy),
1182     .class_init    = virtio_serial_class_init,
1183 };
1184
1185 static Property virtio_balloon_properties[] = {
1186     DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1187     DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
1188     DEFINE_PROP_END_OF_LIST(),
1189 };
1190
1191 static void virtio_balloon_class_init(ObjectClass *klass, void *data)
1192 {
1193     DeviceClass *dc = DEVICE_CLASS(klass);
1194     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1195
1196     k->init = virtio_balloon_init_pci;
1197     k->exit = virtio_balloon_exit_pci;
1198     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1199     k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON;
1200     k->revision = VIRTIO_PCI_ABI_VERSION;
1201     k->class_id = PCI_CLASS_OTHERS;
1202     dc->reset = virtio_pci_reset;
1203     dc->props = virtio_balloon_properties;
1204 }
1205
1206 static const TypeInfo virtio_balloon_info = {
1207     .name          = "virtio-balloon-pci",
1208     .parent        = TYPE_PCI_DEVICE,
1209     .instance_size = sizeof(VirtIOPCIProxy),
1210     .class_init    = virtio_balloon_class_init,
1211 };
1212
1213 static void virtio_rng_initfn(Object *obj)
1214 {
1215     PCIDevice *pci_dev = PCI_DEVICE(obj);
1216     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
1217
1218     object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
1219                              (Object **)&proxy->rng.rng, NULL);
1220 }
1221
1222 static Property virtio_rng_properties[] = {
1223     DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1224     /* Set a default rate limit of 2^47 bytes per minute or roughly 2TB/s.  If
1225        you have an entropy source capable of generating more entropy than this
1226        and you can pass it through via virtio-rng, then hats off to you.  Until
1227        then, this is unlimited for all practical purposes.
1228     */
1229     DEFINE_PROP_UINT64("max-bytes", VirtIOPCIProxy, rng.max_bytes, INT64_MAX),
1230     DEFINE_PROP_UINT32("period", VirtIOPCIProxy, rng.period_ms, 1 << 16),
1231     DEFINE_PROP_END_OF_LIST(),
1232 };
1233
1234 static void virtio_rng_class_init(ObjectClass *klass, void *data)
1235 {
1236     DeviceClass *dc = DEVICE_CLASS(klass);
1237     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1238
1239     k->init = virtio_rng_init_pci;
1240     k->exit = virtio_rng_exit_pci;
1241     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1242     k->device_id = PCI_DEVICE_ID_VIRTIO_RNG;
1243     k->revision = VIRTIO_PCI_ABI_VERSION;
1244     k->class_id = PCI_CLASS_OTHERS;
1245     dc->reset = virtio_pci_reset;
1246     dc->props = virtio_rng_properties;
1247 }
1248
1249 static const TypeInfo virtio_rng_info = {
1250     .name          = "virtio-rng-pci",
1251     .parent        = TYPE_PCI_DEVICE,
1252     .instance_size = sizeof(VirtIOPCIProxy),
1253     .instance_init = virtio_rng_initfn,
1254     .class_init    = virtio_rng_class_init,
1255 };
1256
1257 static int virtio_scsi_init_pci(PCIDevice *pci_dev)
1258 {
1259     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
1260     VirtIODevice *vdev;
1261
1262     vdev = virtio_scsi_init(&pci_dev->qdev, &proxy->scsi);
1263     if (!vdev) {
1264         return -EINVAL;
1265     }
1266
1267     vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED
1268                                         ? proxy->scsi.num_queues + 3
1269                                         : proxy->nvectors;
1270     virtio_init_pci(proxy, vdev);
1271
1272     /* make the actual value visible */
1273     proxy->nvectors = vdev->nvectors;
1274     return 0;
1275 }
1276
1277 static void virtio_scsi_exit_pci(PCIDevice *pci_dev)
1278 {
1279     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
1280
1281     virtio_scsi_exit(proxy->vdev);
1282     virtio_exit_pci(pci_dev);
1283 }
1284
1285 static Property virtio_scsi_properties[] = {
1286     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1287     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED),
1288     DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOPCIProxy, host_features, scsi),
1289     DEFINE_PROP_END_OF_LIST(),
1290 };
1291
1292 static void virtio_scsi_class_init(ObjectClass *klass, void *data)
1293 {
1294     DeviceClass *dc = DEVICE_CLASS(klass);
1295     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1296
1297     k->init = virtio_scsi_init_pci;
1298     k->exit = virtio_scsi_exit_pci;
1299     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1300     k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
1301     k->revision = 0x00;
1302     k->class_id = PCI_CLASS_STORAGE_SCSI;
1303     dc->reset = virtio_pci_reset;
1304     dc->props = virtio_scsi_properties;
1305 }
1306
1307 static const TypeInfo virtio_scsi_info = {
1308     .name          = "virtio-scsi-pci",
1309     .parent        = TYPE_PCI_DEVICE,
1310     .instance_size = sizeof(VirtIOPCIProxy),
1311     .class_init    = virtio_scsi_class_init,
1312 };
1313
1314 static void virtio_pci_register_types(void)
1315 {
1316     type_register_static(&virtio_blk_info);
1317     type_register_static(&virtio_net_info);
1318     type_register_static(&virtio_serial_info);
1319     type_register_static(&virtio_balloon_info);
1320     type_register_static(&virtio_scsi_info);
1321     type_register_static(&virtio_rng_info);
1322 }
1323
1324 type_init(virtio_pci_register_types)