1 /* 2 * Virtio PCI Bindings 3 * 4 * Copyright IBM, Corp. 2007 5 * Copyright (c) 2009 CodeSourcery 6 * 7 * Authors: 8 * Anthony Liguori <aliguori@us.ibm.com> 9 * Paul Brook <paul@codesourcery.com> 10 * 11 * This work is licensed under the terms of the GNU GPL, version 2. See 12 * the COPYING file in the top-level directory. 13 * 14 * Contributions after 2012-01-13 are licensed under the terms of the 15 * GNU GPL, version 2 or (at your option) any later version. 16 */ 17 18 #include <inttypes.h> 19 20 #include "hw/virtio/virtio.h" 21 #include "hw/virtio/virtio-blk.h" 22 #include "hw/virtio/virtio-net.h" 23 #include "hw/virtio/virtio-serial.h" 24 #include "hw/virtio/virtio-scsi.h" 25 #include "hw/virtio/virtio-balloon.h" 26 #include "hw/pci/pci.h" 27 #include "qemu/error-report.h" 28 #include "hw/pci/msi.h" 29 #include "hw/pci/msix.h" 30 #include "hw/loader.h" 31 #include "sysemu/kvm.h" 32 #include "sysemu/blockdev.h" 33 #include "virtio-pci.h" 34 #include "qemu/range.h" 35 #include "hw/virtio/virtio-bus.h" 36 #include "qapi/visitor.h" 37 38 /* from Linux's linux/virtio_pci.h */ 39 40 /* A 32-bit r/o bitmask of the features supported by the host */ 41 #define VIRTIO_PCI_HOST_FEATURES 0 42 43 /* A 32-bit r/w bitmask of features activated by the guest */ 44 #define VIRTIO_PCI_GUEST_FEATURES 4 45 46 /* A 32-bit r/w PFN for the currently selected queue */ 47 #define VIRTIO_PCI_QUEUE_PFN 8 48 49 /* A 16-bit r/o queue size for the currently selected queue */ 50 #define VIRTIO_PCI_QUEUE_NUM 12 51 52 /* A 16-bit r/w queue selector */ 53 #define VIRTIO_PCI_QUEUE_SEL 14 54 55 /* A 16-bit r/w queue notifier */ 56 #define VIRTIO_PCI_QUEUE_NOTIFY 16 57 58 /* An 8-bit device status register. */ 59 #define VIRTIO_PCI_STATUS 18 60 61 /* An 8-bit r/o interrupt status register. Reading the value will return the 62 * current contents of the ISR and will also clear it. This is effectively 63 * a read-and-acknowledge. */ 64 #define VIRTIO_PCI_ISR 19 65 66 /* MSI-X registers: only enabled if MSI-X is enabled. */ 67 /* A 16-bit vector for configuration changes. */ 68 #define VIRTIO_MSI_CONFIG_VECTOR 20 69 /* A 16-bit vector for selected queue notifications. */ 70 #define VIRTIO_MSI_QUEUE_VECTOR 22 71 72 /* Config space size */ 73 #define VIRTIO_PCI_CONFIG_NOMSI 20 74 #define VIRTIO_PCI_CONFIG_MSI 24 75 #define VIRTIO_PCI_REGION_SIZE(dev) (msix_present(dev) ? \ 76 VIRTIO_PCI_CONFIG_MSI : \ 77 VIRTIO_PCI_CONFIG_NOMSI) 78 79 /* The remaining space is defined by each driver as the per-driver 80 * configuration space */ 81 #define VIRTIO_PCI_CONFIG(dev) (msix_enabled(dev) ? \ 82 VIRTIO_PCI_CONFIG_MSI : \ 83 VIRTIO_PCI_CONFIG_NOMSI) 84 85 /* How many bits to shift physical queue address written to QUEUE_PFN. 86 * 12 is historical, and due to x86 page size. */ 87 #define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12 88 89 /* Flags track per-device state like workarounds for quirks in older guests. */ 90 #define VIRTIO_PCI_FLAG_BUS_MASTER_BUG (1 << 0) 91 92 /* HACK for virtio to determine if it's running a big endian guest */ 93 bool virtio_is_big_endian(void); 94 95 static void virtio_pci_bus_new(VirtioBusState *bus, VirtIOPCIProxy *dev); 96 97 /* virtio device */ 98 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */ 99 static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d) 100 { 101 return container_of(d, VirtIOPCIProxy, pci_dev.qdev); 102 } 103 104 /* DeviceState to VirtIOPCIProxy. Note: used on datapath, 105 * be careful and test performance if you change this. 106 */ 107 static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d) 108 { 109 return container_of(d, VirtIOPCIProxy, pci_dev.qdev); 110 } 111 112 static void virtio_pci_notify(DeviceState *d, uint16_t vector) 113 { 114 VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d); 115 if (msix_enabled(&proxy->pci_dev)) 116 msix_notify(&proxy->pci_dev, vector); 117 else 118 qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1); 119 } 120 121 static void virtio_pci_save_config(DeviceState *d, QEMUFile *f) 122 { 123 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 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, proxy->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 if (msix_present(&proxy->pci_dev)) 134 qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n)); 135 } 136 137 static int virtio_pci_load_config(DeviceState *d, QEMUFile *f) 138 { 139 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 140 int ret; 141 ret = pci_device_load(&proxy->pci_dev, f); 142 if (ret) { 143 return ret; 144 } 145 msix_unuse_all_vectors(&proxy->pci_dev); 146 msix_load(&proxy->pci_dev, f); 147 if (msix_present(&proxy->pci_dev)) { 148 qemu_get_be16s(f, &proxy->vdev->config_vector); 149 } else { 150 proxy->vdev->config_vector = VIRTIO_NO_VECTOR; 151 } 152 if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) { 153 return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector); 154 } 155 return 0; 156 } 157 158 static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f) 159 { 160 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 161 uint16_t vector; 162 if (msix_present(&proxy->pci_dev)) { 163 qemu_get_be16s(f, &vector); 164 } else { 165 vector = VIRTIO_NO_VECTOR; 166 } 167 virtio_queue_set_vector(proxy->vdev, n, vector); 168 if (vector != VIRTIO_NO_VECTOR) { 169 return msix_vector_use(&proxy->pci_dev, vector); 170 } 171 return 0; 172 } 173 174 static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy, 175 int n, bool assign, bool set_handler) 176 { 177 VirtQueue *vq = virtio_get_queue(proxy->vdev, n); 178 EventNotifier *notifier = virtio_queue_get_host_notifier(vq); 179 int r = 0; 180 181 if (assign) { 182 r = event_notifier_init(notifier, 1); 183 if (r < 0) { 184 error_report("%s: unable to init event notifier: %d", 185 __func__, r); 186 return r; 187 } 188 virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler); 189 memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2, 190 true, n, notifier); 191 } else { 192 memory_region_del_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2, 193 true, n, notifier); 194 virtio_queue_set_host_notifier_fd_handler(vq, false, false); 195 event_notifier_cleanup(notifier); 196 } 197 return r; 198 } 199 200 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy) 201 { 202 int n, r; 203 204 if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) || 205 proxy->ioeventfd_disabled || 206 proxy->ioeventfd_started) { 207 return; 208 } 209 210 for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { 211 if (!virtio_queue_get_num(proxy->vdev, n)) { 212 continue; 213 } 214 215 r = virtio_pci_set_host_notifier_internal(proxy, n, true, true); 216 if (r < 0) { 217 goto assign_error; 218 } 219 } 220 proxy->ioeventfd_started = true; 221 return; 222 223 assign_error: 224 while (--n >= 0) { 225 if (!virtio_queue_get_num(proxy->vdev, n)) { 226 continue; 227 } 228 229 r = virtio_pci_set_host_notifier_internal(proxy, n, false, false); 230 assert(r >= 0); 231 } 232 proxy->ioeventfd_started = false; 233 error_report("%s: failed. Fallback to a userspace (slower).", __func__); 234 } 235 236 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy) 237 { 238 int r; 239 int n; 240 241 if (!proxy->ioeventfd_started) { 242 return; 243 } 244 245 for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { 246 if (!virtio_queue_get_num(proxy->vdev, n)) { 247 continue; 248 } 249 250 r = virtio_pci_set_host_notifier_internal(proxy, n, false, false); 251 assert(r >= 0); 252 } 253 proxy->ioeventfd_started = false; 254 } 255 256 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) 257 { 258 VirtIOPCIProxy *proxy = opaque; 259 VirtIODevice *vdev = proxy->vdev; 260 hwaddr pa; 261 262 switch (addr) { 263 case VIRTIO_PCI_GUEST_FEATURES: 264 /* Guest does not negotiate properly? We have to assume nothing. */ 265 if (val & (1 << VIRTIO_F_BAD_FEATURE)) { 266 val = virtio_bus_get_vdev_bad_features(&proxy->bus); 267 } 268 virtio_set_features(vdev, val); 269 break; 270 case VIRTIO_PCI_QUEUE_PFN: 271 pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT; 272 if (pa == 0) { 273 virtio_pci_stop_ioeventfd(proxy); 274 virtio_reset(proxy->vdev); 275 msix_unuse_all_vectors(&proxy->pci_dev); 276 } 277 else 278 virtio_queue_set_addr(vdev, vdev->queue_sel, pa); 279 break; 280 case VIRTIO_PCI_QUEUE_SEL: 281 if (val < VIRTIO_PCI_QUEUE_MAX) 282 vdev->queue_sel = val; 283 break; 284 case VIRTIO_PCI_QUEUE_NOTIFY: 285 if (val < VIRTIO_PCI_QUEUE_MAX) { 286 virtio_queue_notify(vdev, val); 287 } 288 break; 289 case VIRTIO_PCI_STATUS: 290 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) { 291 virtio_pci_stop_ioeventfd(proxy); 292 } 293 294 virtio_set_status(vdev, val & 0xFF); 295 296 if (val & VIRTIO_CONFIG_S_DRIVER_OK) { 297 virtio_pci_start_ioeventfd(proxy); 298 } 299 300 if (vdev->status == 0) { 301 virtio_reset(proxy->vdev); 302 msix_unuse_all_vectors(&proxy->pci_dev); 303 } 304 305 /* Linux before 2.6.34 sets the device as OK without enabling 306 the PCI device bus master bit. In this case we need to disable 307 some safety checks. */ 308 if ((val & VIRTIO_CONFIG_S_DRIVER_OK) && 309 !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { 310 proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; 311 } 312 break; 313 case VIRTIO_MSI_CONFIG_VECTOR: 314 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); 315 /* Make it possible for guest to discover an error took place. */ 316 if (msix_vector_use(&proxy->pci_dev, val) < 0) 317 val = VIRTIO_NO_VECTOR; 318 vdev->config_vector = val; 319 break; 320 case VIRTIO_MSI_QUEUE_VECTOR: 321 msix_vector_unuse(&proxy->pci_dev, 322 virtio_queue_vector(vdev, vdev->queue_sel)); 323 /* Make it possible for guest to discover an error took place. */ 324 if (msix_vector_use(&proxy->pci_dev, val) < 0) 325 val = VIRTIO_NO_VECTOR; 326 virtio_queue_set_vector(vdev, vdev->queue_sel, val); 327 break; 328 default: 329 error_report("%s: unexpected address 0x%x value 0x%x", 330 __func__, addr, val); 331 break; 332 } 333 } 334 335 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr) 336 { 337 VirtIODevice *vdev = proxy->vdev; 338 uint32_t ret = 0xFFFFFFFF; 339 340 switch (addr) { 341 case VIRTIO_PCI_HOST_FEATURES: 342 ret = proxy->host_features; 343 break; 344 case VIRTIO_PCI_GUEST_FEATURES: 345 ret = vdev->guest_features; 346 break; 347 case VIRTIO_PCI_QUEUE_PFN: 348 ret = virtio_queue_get_addr(vdev, vdev->queue_sel) 349 >> VIRTIO_PCI_QUEUE_ADDR_SHIFT; 350 break; 351 case VIRTIO_PCI_QUEUE_NUM: 352 ret = virtio_queue_get_num(vdev, vdev->queue_sel); 353 break; 354 case VIRTIO_PCI_QUEUE_SEL: 355 ret = vdev->queue_sel; 356 break; 357 case VIRTIO_PCI_STATUS: 358 ret = vdev->status; 359 break; 360 case VIRTIO_PCI_ISR: 361 /* reading from the ISR also clears it. */ 362 ret = vdev->isr; 363 vdev->isr = 0; 364 qemu_set_irq(proxy->pci_dev.irq[0], 0); 365 break; 366 case VIRTIO_MSI_CONFIG_VECTOR: 367 ret = vdev->config_vector; 368 break; 369 case VIRTIO_MSI_QUEUE_VECTOR: 370 ret = virtio_queue_vector(vdev, vdev->queue_sel); 371 break; 372 default: 373 break; 374 } 375 376 return ret; 377 } 378 379 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr, 380 unsigned size) 381 { 382 VirtIOPCIProxy *proxy = opaque; 383 uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); 384 uint64_t val = 0; 385 if (addr < config) { 386 return virtio_ioport_read(proxy, addr); 387 } 388 addr -= config; 389 390 switch (size) { 391 case 1: 392 val = virtio_config_readb(proxy->vdev, addr); 393 break; 394 case 2: 395 val = virtio_config_readw(proxy->vdev, addr); 396 if (virtio_is_big_endian()) { 397 val = bswap16(val); 398 } 399 break; 400 case 4: 401 val = virtio_config_readl(proxy->vdev, addr); 402 if (virtio_is_big_endian()) { 403 val = bswap32(val); 404 } 405 break; 406 } 407 return val; 408 } 409 410 static void virtio_pci_config_write(void *opaque, hwaddr addr, 411 uint64_t val, unsigned size) 412 { 413 VirtIOPCIProxy *proxy = opaque; 414 uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); 415 if (addr < config) { 416 virtio_ioport_write(proxy, addr, val); 417 return; 418 } 419 addr -= config; 420 /* 421 * Virtio-PCI is odd. Ioports are LE but config space is target native 422 * endian. 423 */ 424 switch (size) { 425 case 1: 426 virtio_config_writeb(proxy->vdev, addr, val); 427 break; 428 case 2: 429 if (virtio_is_big_endian()) { 430 val = bswap16(val); 431 } 432 virtio_config_writew(proxy->vdev, addr, val); 433 break; 434 case 4: 435 if (virtio_is_big_endian()) { 436 val = bswap32(val); 437 } 438 virtio_config_writel(proxy->vdev, addr, val); 439 break; 440 } 441 } 442 443 static const MemoryRegionOps virtio_pci_config_ops = { 444 .read = virtio_pci_config_read, 445 .write = virtio_pci_config_write, 446 .impl = { 447 .min_access_size = 1, 448 .max_access_size = 4, 449 }, 450 .endianness = DEVICE_LITTLE_ENDIAN, 451 }; 452 453 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, 454 uint32_t val, int len) 455 { 456 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); 457 458 pci_default_write_config(pci_dev, address, val, len); 459 460 if (range_covers_byte(address, len, PCI_COMMAND) && 461 !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) && 462 !(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) { 463 virtio_pci_stop_ioeventfd(proxy); 464 virtio_set_status(proxy->vdev, 465 proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); 466 } 467 } 468 469 static unsigned virtio_pci_get_features(DeviceState *d) 470 { 471 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 472 return proxy->host_features; 473 } 474 475 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, 476 unsigned int queue_no, 477 unsigned int vector, 478 MSIMessage msg) 479 { 480 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 481 int ret; 482 483 if (irqfd->users == 0) { 484 ret = kvm_irqchip_add_msi_route(kvm_state, msg); 485 if (ret < 0) { 486 return ret; 487 } 488 irqfd->virq = ret; 489 } 490 irqfd->users++; 491 return 0; 492 } 493 494 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, 495 unsigned int vector) 496 { 497 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 498 if (--irqfd->users == 0) { 499 kvm_irqchip_release_virq(kvm_state, irqfd->virq); 500 } 501 } 502 503 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy, 504 unsigned int queue_no, 505 unsigned int vector) 506 { 507 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 508 VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); 509 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 510 int ret; 511 ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, irqfd->virq); 512 return ret; 513 } 514 515 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy, 516 unsigned int queue_no, 517 unsigned int vector) 518 { 519 VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); 520 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 521 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 522 int ret; 523 524 ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq); 525 assert(ret == 0); 526 } 527 528 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs) 529 { 530 PCIDevice *dev = &proxy->pci_dev; 531 VirtIODevice *vdev = proxy->vdev; 532 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 533 unsigned int vector; 534 int ret, queue_no; 535 MSIMessage msg; 536 537 for (queue_no = 0; queue_no < nvqs; queue_no++) { 538 if (!virtio_queue_get_num(vdev, queue_no)) { 539 break; 540 } 541 vector = virtio_queue_vector(vdev, queue_no); 542 if (vector >= msix_nr_vectors_allocated(dev)) { 543 continue; 544 } 545 msg = msix_get_message(dev, vector); 546 ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg); 547 if (ret < 0) { 548 goto undo; 549 } 550 /* If guest supports masking, set up irqfd now. 551 * Otherwise, delay until unmasked in the frontend. 552 */ 553 if (k->guest_notifier_mask) { 554 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); 555 if (ret < 0) { 556 kvm_virtio_pci_vq_vector_release(proxy, vector); 557 goto undo; 558 } 559 } 560 } 561 return 0; 562 563 undo: 564 while (--queue_no >= 0) { 565 vector = virtio_queue_vector(vdev, queue_no); 566 if (vector >= msix_nr_vectors_allocated(dev)) { 567 continue; 568 } 569 if (k->guest_notifier_mask) { 570 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 571 } 572 kvm_virtio_pci_vq_vector_release(proxy, vector); 573 } 574 return ret; 575 } 576 577 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs) 578 { 579 PCIDevice *dev = &proxy->pci_dev; 580 VirtIODevice *vdev = proxy->vdev; 581 unsigned int vector; 582 int queue_no; 583 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 584 585 for (queue_no = 0; queue_no < nvqs; queue_no++) { 586 if (!virtio_queue_get_num(vdev, queue_no)) { 587 break; 588 } 589 vector = virtio_queue_vector(vdev, queue_no); 590 if (vector >= msix_nr_vectors_allocated(dev)) { 591 continue; 592 } 593 /* If guest supports masking, clean up irqfd now. 594 * Otherwise, it was cleaned when masked in the frontend. 595 */ 596 if (k->guest_notifier_mask) { 597 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 598 } 599 kvm_virtio_pci_vq_vector_release(proxy, vector); 600 } 601 } 602 603 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy, 604 unsigned int queue_no, 605 unsigned int vector, 606 MSIMessage msg) 607 { 608 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(proxy->vdev); 609 VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); 610 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 611 VirtIOIRQFD *irqfd; 612 int ret = 0; 613 614 if (proxy->vector_irqfd) { 615 irqfd = &proxy->vector_irqfd[vector]; 616 if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) { 617 ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg); 618 if (ret < 0) { 619 return ret; 620 } 621 } 622 } 623 624 /* If guest supports masking, irqfd is already setup, unmask it. 625 * Otherwise, set it up now. 626 */ 627 if (k->guest_notifier_mask) { 628 k->guest_notifier_mask(proxy->vdev, queue_no, false); 629 /* Test after unmasking to avoid losing events. */ 630 if (k->guest_notifier_pending && 631 k->guest_notifier_pending(proxy->vdev, queue_no)) { 632 event_notifier_set(n); 633 } 634 } else { 635 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); 636 } 637 return ret; 638 } 639 640 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy, 641 unsigned int queue_no, 642 unsigned int vector) 643 { 644 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(proxy->vdev); 645 646 /* If guest supports masking, keep irqfd but mask it. 647 * Otherwise, clean it up now. 648 */ 649 if (k->guest_notifier_mask) { 650 k->guest_notifier_mask(proxy->vdev, queue_no, true); 651 } else { 652 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 653 } 654 } 655 656 static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector, 657 MSIMessage msg) 658 { 659 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 660 VirtIODevice *vdev = proxy->vdev; 661 int ret, queue_no; 662 663 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { 664 if (!virtio_queue_get_num(vdev, queue_no)) { 665 break; 666 } 667 if (virtio_queue_vector(vdev, queue_no) != vector) { 668 continue; 669 } 670 ret = virtio_pci_vq_vector_unmask(proxy, queue_no, vector, msg); 671 if (ret < 0) { 672 goto undo; 673 } 674 } 675 return 0; 676 677 undo: 678 while (--queue_no >= 0) { 679 if (virtio_queue_vector(vdev, queue_no) != vector) { 680 continue; 681 } 682 virtio_pci_vq_vector_mask(proxy, queue_no, vector); 683 } 684 return ret; 685 } 686 687 static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector) 688 { 689 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 690 VirtIODevice *vdev = proxy->vdev; 691 int queue_no; 692 693 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { 694 if (!virtio_queue_get_num(vdev, queue_no)) { 695 break; 696 } 697 if (virtio_queue_vector(vdev, queue_no) != vector) { 698 continue; 699 } 700 virtio_pci_vq_vector_mask(proxy, queue_no, vector); 701 } 702 } 703 704 static void virtio_pci_vector_poll(PCIDevice *dev, 705 unsigned int vector_start, 706 unsigned int vector_end) 707 { 708 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 709 VirtIODevice *vdev = proxy->vdev; 710 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 711 int queue_no; 712 unsigned int vector; 713 EventNotifier *notifier; 714 VirtQueue *vq; 715 716 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { 717 if (!virtio_queue_get_num(vdev, queue_no)) { 718 break; 719 } 720 vector = virtio_queue_vector(vdev, queue_no); 721 if (vector < vector_start || vector >= vector_end || 722 !msix_is_masked(dev, vector)) { 723 continue; 724 } 725 vq = virtio_get_queue(vdev, queue_no); 726 notifier = virtio_queue_get_guest_notifier(vq); 727 if (k->guest_notifier_pending) { 728 if (k->guest_notifier_pending(vdev, queue_no)) { 729 msix_set_pending(dev, vector); 730 } 731 } else if (event_notifier_test_and_clear(notifier)) { 732 msix_set_pending(dev, vector); 733 } 734 } 735 } 736 737 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign, 738 bool with_irqfd) 739 { 740 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 741 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(proxy->vdev); 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 if (!msix_enabled(&proxy->pci_dev) && vdc->guest_notifier_mask) { 757 vdc->guest_notifier_mask(proxy->vdev, n, !assign); 758 } 759 760 return 0; 761 } 762 763 static bool virtio_pci_query_guest_notifiers(DeviceState *d) 764 { 765 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 766 return msix_enabled(&proxy->pci_dev); 767 } 768 769 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign) 770 { 771 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 772 VirtIODevice *vdev = proxy->vdev; 773 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 774 int r, n; 775 bool with_irqfd = msix_enabled(&proxy->pci_dev) && 776 kvm_msi_via_irqfd_enabled(); 777 778 nvqs = MIN(nvqs, VIRTIO_PCI_QUEUE_MAX); 779 780 /* When deassigning, pass a consistent nvqs value 781 * to avoid leaking notifiers. 782 */ 783 assert(assign || nvqs == proxy->nvqs_with_notifiers); 784 785 proxy->nvqs_with_notifiers = nvqs; 786 787 /* Must unset vector notifier while guest notifier is still assigned */ 788 if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) { 789 msix_unset_vector_notifiers(&proxy->pci_dev); 790 if (proxy->vector_irqfd) { 791 kvm_virtio_pci_vector_release(proxy, nvqs); 792 g_free(proxy->vector_irqfd); 793 proxy->vector_irqfd = NULL; 794 } 795 } 796 797 for (n = 0; n < nvqs; n++) { 798 if (!virtio_queue_get_num(vdev, n)) { 799 break; 800 } 801 802 r = virtio_pci_set_guest_notifier(d, n, assign, 803 kvm_msi_via_irqfd_enabled()); 804 if (r < 0) { 805 goto assign_error; 806 } 807 } 808 809 /* Must set vector notifier after guest notifier has been assigned */ 810 if ((with_irqfd || k->guest_notifier_mask) && assign) { 811 if (with_irqfd) { 812 proxy->vector_irqfd = 813 g_malloc0(sizeof(*proxy->vector_irqfd) * 814 msix_nr_vectors_allocated(&proxy->pci_dev)); 815 r = kvm_virtio_pci_vector_use(proxy, nvqs); 816 if (r < 0) { 817 goto assign_error; 818 } 819 } 820 r = msix_set_vector_notifiers(&proxy->pci_dev, 821 virtio_pci_vector_unmask, 822 virtio_pci_vector_mask, 823 virtio_pci_vector_poll); 824 if (r < 0) { 825 goto notifiers_error; 826 } 827 } 828 829 return 0; 830 831 notifiers_error: 832 if (with_irqfd) { 833 assert(assign); 834 kvm_virtio_pci_vector_release(proxy, nvqs); 835 } 836 837 assign_error: 838 /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */ 839 assert(assign); 840 while (--n >= 0) { 841 virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd); 842 } 843 return r; 844 } 845 846 static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign) 847 { 848 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 849 850 /* Stop using ioeventfd for virtqueue kick if the device starts using host 851 * notifiers. This makes it easy to avoid stepping on each others' toes. 852 */ 853 proxy->ioeventfd_disabled = assign; 854 if (assign) { 855 virtio_pci_stop_ioeventfd(proxy); 856 } 857 /* We don't need to start here: it's not needed because backend 858 * currently only stops on status change away from ok, 859 * reset, vmstop and such. If we do add code to start here, 860 * need to check vmstate, device state etc. */ 861 return virtio_pci_set_host_notifier_internal(proxy, n, assign, false); 862 } 863 864 static void virtio_pci_vmstate_change(DeviceState *d, bool running) 865 { 866 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 867 868 if (running) { 869 /* Try to find out if the guest has bus master disabled, but is 870 in ready state. Then we have a buggy guest OS. */ 871 if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) && 872 !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { 873 proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; 874 } 875 virtio_pci_start_ioeventfd(proxy); 876 } else { 877 virtio_pci_stop_ioeventfd(proxy); 878 } 879 } 880 881 #ifdef CONFIG_VIRTFS 882 static int virtio_9p_init_pci(VirtIOPCIProxy *vpci_dev) 883 { 884 V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev); 885 DeviceState *vdev = DEVICE(&dev->vdev); 886 887 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 888 if (qdev_init(vdev) < 0) { 889 return -1; 890 } 891 return 0; 892 } 893 894 static Property virtio_9p_pci_properties[] = { 895 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 896 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 897 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 898 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 899 DEFINE_VIRTIO_9P_PROPERTIES(V9fsPCIState, vdev.fsconf), 900 DEFINE_PROP_END_OF_LIST(), 901 }; 902 903 static void virtio_9p_pci_class_init(ObjectClass *klass, void *data) 904 { 905 DeviceClass *dc = DEVICE_CLASS(klass); 906 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 907 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 908 909 k->init = virtio_9p_init_pci; 910 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 911 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P; 912 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 913 pcidev_k->class_id = 0x2; 914 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 915 dc->props = virtio_9p_pci_properties; 916 } 917 918 static void virtio_9p_pci_instance_init(Object *obj) 919 { 920 V9fsPCIState *dev = VIRTIO_9P_PCI(obj); 921 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_9P); 922 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 923 } 924 925 static const TypeInfo virtio_9p_pci_info = { 926 .name = TYPE_VIRTIO_9P_PCI, 927 .parent = TYPE_VIRTIO_PCI, 928 .instance_size = sizeof(V9fsPCIState), 929 .instance_init = virtio_9p_pci_instance_init, 930 .class_init = virtio_9p_pci_class_init, 931 }; 932 #endif /* CONFIG_VIRTFS */ 933 934 /* 935 * virtio-pci: This is the PCIDevice which has a virtio-pci-bus. 936 */ 937 938 /* This is called by virtio-bus just after the device is plugged. */ 939 static void virtio_pci_device_plugged(DeviceState *d) 940 { 941 VirtIOPCIProxy *proxy = VIRTIO_PCI(d); 942 VirtioBusState *bus = &proxy->bus; 943 uint8_t *config; 944 uint32_t size; 945 946 proxy->vdev = bus->vdev; 947 948 config = proxy->pci_dev.config; 949 if (proxy->class_code) { 950 pci_config_set_class(config, proxy->class_code); 951 } 952 pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID, 953 pci_get_word(config + PCI_VENDOR_ID)); 954 pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus)); 955 config[PCI_INTERRUPT_PIN] = 1; 956 957 if (proxy->nvectors && 958 msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1)) { 959 proxy->nvectors = 0; 960 } 961 962 proxy->pci_dev.config_write = virtio_write_config; 963 964 size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) 965 + virtio_bus_get_vdev_config_len(bus); 966 if (size & (size - 1)) { 967 size = 1 << qemu_fls(size); 968 } 969 970 memory_region_init_io(&proxy->bar, OBJECT(proxy), &virtio_pci_config_ops, 971 proxy, "virtio-pci", size); 972 pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, 973 &proxy->bar); 974 975 if (!kvm_has_many_ioeventfds()) { 976 proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; 977 } 978 979 proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY; 980 proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE; 981 proxy->host_features = virtio_bus_get_vdev_features(bus, 982 proxy->host_features); 983 } 984 985 static int virtio_pci_init(PCIDevice *pci_dev) 986 { 987 VirtIOPCIProxy *dev = VIRTIO_PCI(pci_dev); 988 VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev); 989 virtio_pci_bus_new(&dev->bus, dev); 990 if (k->init != NULL) { 991 return k->init(dev); 992 } 993 return 0; 994 } 995 996 static void virtio_pci_exit(PCIDevice *pci_dev) 997 { 998 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev); 999 virtio_pci_stop_ioeventfd(proxy); 1000 memory_region_destroy(&proxy->bar); 1001 msix_uninit_exclusive_bar(pci_dev); 1002 } 1003 1004 static void virtio_pci_reset(DeviceState *qdev) 1005 { 1006 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev); 1007 VirtioBusState *bus = VIRTIO_BUS(&proxy->bus); 1008 virtio_pci_stop_ioeventfd(proxy); 1009 virtio_bus_reset(bus); 1010 msix_unuse_all_vectors(&proxy->pci_dev); 1011 proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG; 1012 } 1013 1014 static void virtio_pci_class_init(ObjectClass *klass, void *data) 1015 { 1016 DeviceClass *dc = DEVICE_CLASS(klass); 1017 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 1018 1019 k->init = virtio_pci_init; 1020 k->exit = virtio_pci_exit; 1021 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1022 k->revision = VIRTIO_PCI_ABI_VERSION; 1023 k->class_id = PCI_CLASS_OTHERS; 1024 dc->reset = virtio_pci_reset; 1025 } 1026 1027 static const TypeInfo virtio_pci_info = { 1028 .name = TYPE_VIRTIO_PCI, 1029 .parent = TYPE_PCI_DEVICE, 1030 .instance_size = sizeof(VirtIOPCIProxy), 1031 .class_init = virtio_pci_class_init, 1032 .class_size = sizeof(VirtioPCIClass), 1033 .abstract = true, 1034 }; 1035 1036 /* virtio-blk-pci */ 1037 1038 static Property virtio_blk_pci_properties[] = { 1039 DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), 1040 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1041 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1042 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 1043 #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 1044 DEFINE_PROP_BIT("x-data-plane", VirtIOBlkPCI, blk.data_plane, 0, false), 1045 #endif 1046 DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features), 1047 DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkPCI, blk), 1048 DEFINE_PROP_END_OF_LIST(), 1049 }; 1050 1051 static int virtio_blk_pci_init(VirtIOPCIProxy *vpci_dev) 1052 { 1053 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev); 1054 DeviceState *vdev = DEVICE(&dev->vdev); 1055 virtio_blk_set_conf(vdev, &(dev->blk)); 1056 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1057 if (qdev_init(vdev) < 0) { 1058 return -1; 1059 } 1060 return 0; 1061 } 1062 1063 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data) 1064 { 1065 DeviceClass *dc = DEVICE_CLASS(klass); 1066 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1067 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1068 1069 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1070 dc->props = virtio_blk_pci_properties; 1071 k->init = virtio_blk_pci_init; 1072 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1073 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; 1074 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1075 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 1076 } 1077 1078 static void virtio_blk_pci_instance_init(Object *obj) 1079 { 1080 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj); 1081 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BLK); 1082 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1083 } 1084 1085 static const TypeInfo virtio_blk_pci_info = { 1086 .name = TYPE_VIRTIO_BLK_PCI, 1087 .parent = TYPE_VIRTIO_PCI, 1088 .instance_size = sizeof(VirtIOBlkPCI), 1089 .instance_init = virtio_blk_pci_instance_init, 1090 .class_init = virtio_blk_pci_class_init, 1091 }; 1092 1093 /* virtio-scsi-pci */ 1094 1095 static Property virtio_scsi_pci_properties[] = { 1096 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1097 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1098 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 1099 DEV_NVECTORS_UNSPECIFIED), 1100 DEFINE_VIRTIO_SCSI_FEATURES(VirtIOPCIProxy, host_features), 1101 DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSIPCI, vdev.parent_obj.conf), 1102 DEFINE_PROP_END_OF_LIST(), 1103 }; 1104 1105 static int virtio_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev) 1106 { 1107 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev); 1108 DeviceState *vdev = DEVICE(&dev->vdev); 1109 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); 1110 DeviceState *proxy = DEVICE(vpci_dev); 1111 char *bus_name; 1112 1113 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 1114 vpci_dev->nvectors = vs->conf.num_queues + 3; 1115 } 1116 1117 /* 1118 * For command line compatibility, this sets the virtio-scsi-device bus 1119 * name as before. 1120 */ 1121 if (proxy->id) { 1122 bus_name = g_strdup_printf("%s.0", proxy->id); 1123 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 1124 g_free(bus_name); 1125 } 1126 1127 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1128 if (qdev_init(vdev) < 0) { 1129 return -1; 1130 } 1131 return 0; 1132 } 1133 1134 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data) 1135 { 1136 DeviceClass *dc = DEVICE_CLASS(klass); 1137 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1138 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1139 k->init = virtio_scsi_pci_init_pci; 1140 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1141 dc->props = virtio_scsi_pci_properties; 1142 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1143 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 1144 pcidev_k->revision = 0x00; 1145 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 1146 } 1147 1148 static void virtio_scsi_pci_instance_init(Object *obj) 1149 { 1150 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj); 1151 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SCSI); 1152 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1153 } 1154 1155 static const TypeInfo virtio_scsi_pci_info = { 1156 .name = TYPE_VIRTIO_SCSI_PCI, 1157 .parent = TYPE_VIRTIO_PCI, 1158 .instance_size = sizeof(VirtIOSCSIPCI), 1159 .instance_init = virtio_scsi_pci_instance_init, 1160 .class_init = virtio_scsi_pci_class_init, 1161 }; 1162 1163 /* vhost-scsi-pci */ 1164 1165 #ifdef CONFIG_VHOST_SCSI 1166 static Property vhost_scsi_pci_properties[] = { 1167 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 1168 DEV_NVECTORS_UNSPECIFIED), 1169 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1170 DEFINE_VHOST_SCSI_PROPERTIES(VHostSCSIPCI, vdev.parent_obj.conf), 1171 DEFINE_PROP_END_OF_LIST(), 1172 }; 1173 1174 static int vhost_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev) 1175 { 1176 VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev); 1177 DeviceState *vdev = DEVICE(&dev->vdev); 1178 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); 1179 1180 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 1181 vpci_dev->nvectors = vs->conf.num_queues + 3; 1182 } 1183 1184 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1185 if (qdev_init(vdev) < 0) { 1186 return -1; 1187 } 1188 return 0; 1189 } 1190 1191 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data) 1192 { 1193 DeviceClass *dc = DEVICE_CLASS(klass); 1194 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1195 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1196 k->init = vhost_scsi_pci_init_pci; 1197 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1198 dc->props = vhost_scsi_pci_properties; 1199 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1200 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 1201 pcidev_k->revision = 0x00; 1202 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 1203 } 1204 1205 static void vhost_scsi_pci_instance_init(Object *obj) 1206 { 1207 VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj); 1208 object_initialize(OBJECT(&dev->vdev), TYPE_VHOST_SCSI); 1209 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1210 } 1211 1212 static const TypeInfo vhost_scsi_pci_info = { 1213 .name = TYPE_VHOST_SCSI_PCI, 1214 .parent = TYPE_VIRTIO_PCI, 1215 .instance_size = sizeof(VHostSCSIPCI), 1216 .instance_init = vhost_scsi_pci_instance_init, 1217 .class_init = vhost_scsi_pci_class_init, 1218 }; 1219 #endif 1220 1221 /* virtio-balloon-pci */ 1222 1223 static void balloon_pci_stats_get_all(Object *obj, struct Visitor *v, 1224 void *opaque, const char *name, 1225 Error **errp) 1226 { 1227 VirtIOBalloonPCI *dev = opaque; 1228 object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp); 1229 } 1230 1231 static void balloon_pci_stats_get_poll_interval(Object *obj, struct Visitor *v, 1232 void *opaque, const char *name, 1233 Error **errp) 1234 { 1235 VirtIOBalloonPCI *dev = opaque; 1236 object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 1237 errp); 1238 } 1239 1240 static void balloon_pci_stats_set_poll_interval(Object *obj, struct Visitor *v, 1241 void *opaque, const char *name, 1242 Error **errp) 1243 { 1244 VirtIOBalloonPCI *dev = opaque; 1245 object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 1246 errp); 1247 } 1248 1249 static Property virtio_balloon_pci_properties[] = { 1250 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1251 DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), 1252 DEFINE_PROP_END_OF_LIST(), 1253 }; 1254 1255 static int virtio_balloon_pci_init(VirtIOPCIProxy *vpci_dev) 1256 { 1257 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev); 1258 DeviceState *vdev = DEVICE(&dev->vdev); 1259 1260 if (vpci_dev->class_code != PCI_CLASS_OTHERS && 1261 vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */ 1262 vpci_dev->class_code = PCI_CLASS_OTHERS; 1263 } 1264 1265 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1266 if (qdev_init(vdev) < 0) { 1267 return -1; 1268 } 1269 return 0; 1270 } 1271 1272 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data) 1273 { 1274 DeviceClass *dc = DEVICE_CLASS(klass); 1275 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1276 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1277 k->init = virtio_balloon_pci_init; 1278 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 1279 dc->props = virtio_balloon_pci_properties; 1280 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1281 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON; 1282 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1283 pcidev_k->class_id = PCI_CLASS_OTHERS; 1284 } 1285 1286 static void virtio_balloon_pci_instance_init(Object *obj) 1287 { 1288 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj); 1289 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BALLOON); 1290 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1291 1292 object_property_add(obj, "guest-stats", "guest statistics", 1293 balloon_pci_stats_get_all, NULL, NULL, dev, 1294 NULL); 1295 1296 object_property_add(obj, "guest-stats-polling-interval", "int", 1297 balloon_pci_stats_get_poll_interval, 1298 balloon_pci_stats_set_poll_interval, 1299 NULL, dev, NULL); 1300 } 1301 1302 static const TypeInfo virtio_balloon_pci_info = { 1303 .name = TYPE_VIRTIO_BALLOON_PCI, 1304 .parent = TYPE_VIRTIO_PCI, 1305 .instance_size = sizeof(VirtIOBalloonPCI), 1306 .instance_init = virtio_balloon_pci_instance_init, 1307 .class_init = virtio_balloon_pci_class_init, 1308 }; 1309 1310 /* virtio-serial-pci */ 1311 1312 static int virtio_serial_pci_init(VirtIOPCIProxy *vpci_dev) 1313 { 1314 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev); 1315 DeviceState *vdev = DEVICE(&dev->vdev); 1316 DeviceState *proxy = DEVICE(vpci_dev); 1317 char *bus_name; 1318 1319 if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER && 1320 vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */ 1321 vpci_dev->class_code != PCI_CLASS_OTHERS) { /* qemu-kvm */ 1322 vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER; 1323 } 1324 1325 /* backwards-compatibility with machines that were created with 1326 DEV_NVECTORS_UNSPECIFIED */ 1327 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 1328 vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1; 1329 } 1330 1331 /* 1332 * For command line compatibility, this sets the virtio-serial-device bus 1333 * name as before. 1334 */ 1335 if (proxy->id) { 1336 bus_name = g_strdup_printf("%s.0", proxy->id); 1337 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 1338 g_free(bus_name); 1339 } 1340 1341 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1342 if (qdev_init(vdev) < 0) { 1343 return -1; 1344 } 1345 return 0; 1346 } 1347 1348 static Property virtio_serial_pci_properties[] = { 1349 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1350 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1351 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 1352 DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), 1353 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1354 DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtIOSerialPCI, vdev.serial), 1355 DEFINE_PROP_END_OF_LIST(), 1356 }; 1357 1358 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data) 1359 { 1360 DeviceClass *dc = DEVICE_CLASS(klass); 1361 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1362 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1363 k->init = virtio_serial_pci_init; 1364 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 1365 dc->props = virtio_serial_pci_properties; 1366 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1367 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE; 1368 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1369 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER; 1370 } 1371 1372 static void virtio_serial_pci_instance_init(Object *obj) 1373 { 1374 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj); 1375 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SERIAL); 1376 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1377 } 1378 1379 static const TypeInfo virtio_serial_pci_info = { 1380 .name = TYPE_VIRTIO_SERIAL_PCI, 1381 .parent = TYPE_VIRTIO_PCI, 1382 .instance_size = sizeof(VirtIOSerialPCI), 1383 .instance_init = virtio_serial_pci_instance_init, 1384 .class_init = virtio_serial_pci_class_init, 1385 }; 1386 1387 /* virtio-net-pci */ 1388 1389 static Property virtio_net_properties[] = { 1390 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1391 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false), 1392 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), 1393 DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features), 1394 DEFINE_NIC_PROPERTIES(VirtIONetPCI, vdev.nic_conf), 1395 DEFINE_VIRTIO_NET_PROPERTIES(VirtIONetPCI, vdev.net_conf), 1396 DEFINE_PROP_END_OF_LIST(), 1397 }; 1398 1399 static int virtio_net_pci_init(VirtIOPCIProxy *vpci_dev) 1400 { 1401 DeviceState *qdev = DEVICE(vpci_dev); 1402 VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev); 1403 DeviceState *vdev = DEVICE(&dev->vdev); 1404 1405 virtio_net_set_config_size(&dev->vdev, vpci_dev->host_features); 1406 virtio_net_set_netclient_name(&dev->vdev, qdev->id, 1407 object_get_typename(OBJECT(qdev))); 1408 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1409 if (qdev_init(vdev) < 0) { 1410 return -1; 1411 } 1412 return 0; 1413 } 1414 1415 static void virtio_net_pci_class_init(ObjectClass *klass, void *data) 1416 { 1417 DeviceClass *dc = DEVICE_CLASS(klass); 1418 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 1419 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass); 1420 1421 k->romfile = "efi-virtio.rom"; 1422 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1423 k->device_id = PCI_DEVICE_ID_VIRTIO_NET; 1424 k->revision = VIRTIO_PCI_ABI_VERSION; 1425 k->class_id = PCI_CLASS_NETWORK_ETHERNET; 1426 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 1427 dc->props = virtio_net_properties; 1428 vpciklass->init = virtio_net_pci_init; 1429 } 1430 1431 static void virtio_net_pci_instance_init(Object *obj) 1432 { 1433 VirtIONetPCI *dev = VIRTIO_NET_PCI(obj); 1434 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_NET); 1435 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1436 } 1437 1438 static const TypeInfo virtio_net_pci_info = { 1439 .name = TYPE_VIRTIO_NET_PCI, 1440 .parent = TYPE_VIRTIO_PCI, 1441 .instance_size = sizeof(VirtIONetPCI), 1442 .instance_init = virtio_net_pci_instance_init, 1443 .class_init = virtio_net_pci_class_init, 1444 }; 1445 1446 /* virtio-rng-pci */ 1447 1448 static Property virtio_rng_pci_properties[] = { 1449 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1450 DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORngPCI, vdev.conf), 1451 DEFINE_PROP_END_OF_LIST(), 1452 }; 1453 1454 static int virtio_rng_pci_init(VirtIOPCIProxy *vpci_dev) 1455 { 1456 VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev); 1457 DeviceState *vdev = DEVICE(&vrng->vdev); 1458 1459 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1460 if (qdev_init(vdev) < 0) { 1461 return -1; 1462 } 1463 1464 object_property_set_link(OBJECT(vrng), 1465 OBJECT(vrng->vdev.conf.rng), "rng", 1466 NULL); 1467 1468 return 0; 1469 } 1470 1471 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data) 1472 { 1473 DeviceClass *dc = DEVICE_CLASS(klass); 1474 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1475 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1476 1477 k->init = virtio_rng_pci_init; 1478 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 1479 dc->props = virtio_rng_pci_properties; 1480 1481 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1482 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG; 1483 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1484 pcidev_k->class_id = PCI_CLASS_OTHERS; 1485 } 1486 1487 static void virtio_rng_initfn(Object *obj) 1488 { 1489 VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj); 1490 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_RNG); 1491 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1492 object_property_add_link(obj, "rng", TYPE_RNG_BACKEND, 1493 (Object **)&dev->vdev.conf.rng, NULL); 1494 1495 } 1496 1497 static const TypeInfo virtio_rng_pci_info = { 1498 .name = TYPE_VIRTIO_RNG_PCI, 1499 .parent = TYPE_VIRTIO_PCI, 1500 .instance_size = sizeof(VirtIORngPCI), 1501 .instance_init = virtio_rng_initfn, 1502 .class_init = virtio_rng_pci_class_init, 1503 }; 1504 1505 /* virtio-pci-bus */ 1506 1507 static void virtio_pci_bus_new(VirtioBusState *bus, VirtIOPCIProxy *dev) 1508 { 1509 DeviceState *qdev = DEVICE(dev); 1510 BusState *qbus; 1511 char virtio_bus_name[] = "virtio-bus"; 1512 1513 qbus_create_inplace((BusState *)bus, TYPE_VIRTIO_PCI_BUS, qdev, 1514 virtio_bus_name); 1515 qbus = BUS(bus); 1516 qbus->allow_hotplug = 1; 1517 } 1518 1519 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data) 1520 { 1521 BusClass *bus_class = BUS_CLASS(klass); 1522 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 1523 bus_class->max_dev = 1; 1524 k->notify = virtio_pci_notify; 1525 k->save_config = virtio_pci_save_config; 1526 k->load_config = virtio_pci_load_config; 1527 k->save_queue = virtio_pci_save_queue; 1528 k->load_queue = virtio_pci_load_queue; 1529 k->get_features = virtio_pci_get_features; 1530 k->query_guest_notifiers = virtio_pci_query_guest_notifiers; 1531 k->set_host_notifier = virtio_pci_set_host_notifier; 1532 k->set_guest_notifiers = virtio_pci_set_guest_notifiers; 1533 k->vmstate_change = virtio_pci_vmstate_change; 1534 k->device_plugged = virtio_pci_device_plugged; 1535 } 1536 1537 static const TypeInfo virtio_pci_bus_info = { 1538 .name = TYPE_VIRTIO_PCI_BUS, 1539 .parent = TYPE_VIRTIO_BUS, 1540 .instance_size = sizeof(VirtioPCIBusState), 1541 .class_init = virtio_pci_bus_class_init, 1542 }; 1543 1544 static void virtio_pci_register_types(void) 1545 { 1546 type_register_static(&virtio_rng_pci_info); 1547 type_register_static(&virtio_pci_bus_info); 1548 type_register_static(&virtio_pci_info); 1549 #ifdef CONFIG_VIRTFS 1550 type_register_static(&virtio_9p_pci_info); 1551 #endif 1552 type_register_static(&virtio_blk_pci_info); 1553 type_register_static(&virtio_scsi_pci_info); 1554 type_register_static(&virtio_balloon_pci_info); 1555 type_register_static(&virtio_serial_pci_info); 1556 type_register_static(&virtio_net_pci_info); 1557 #ifdef CONFIG_VHOST_SCSI 1558 type_register_static(&vhost_scsi_pci_info); 1559 #endif 1560 } 1561 1562 type_init(virtio_pci_register_types) 1563