1 /* 2 * Virtio PCI Bindings 3 * 4 * Copyright IBM, Corp. 2007 5 * Copyright (c) 2009 CodeSourcery 6 * 7 * Authors: 8 * Anthony Liguori <aliguori@us.ibm.com> 9 * Paul Brook <paul@codesourcery.com> 10 * 11 * This work is licensed under the terms of the GNU GPL, version 2. See 12 * the COPYING file in the top-level directory. 13 * 14 * Contributions after 2012-01-13 are licensed under the terms of the 15 * GNU GPL, version 2 or (at your option) any later version. 16 */ 17 18 #include <inttypes.h> 19 20 #include "hw/virtio/virtio.h" 21 #include "hw/virtio/virtio-blk.h" 22 #include "hw/virtio/virtio-net.h" 23 #include "hw/virtio/virtio-serial.h" 24 #include "hw/virtio/virtio-scsi.h" 25 #include "hw/virtio/virtio-balloon.h" 26 #include "hw/pci/pci.h" 27 #include "qemu/error-report.h" 28 #include "hw/pci/msi.h" 29 #include "hw/pci/msix.h" 30 #include "hw/loader.h" 31 #include "sysemu/kvm.h" 32 #include "sysemu/blockdev.h" 33 #include "virtio-pci.h" 34 #include "qemu/range.h" 35 #include "hw/virtio/virtio-bus.h" 36 #include "qapi/visitor.h" 37 38 /* from Linux's linux/virtio_pci.h */ 39 40 /* A 32-bit r/o bitmask of the features supported by the host */ 41 #define VIRTIO_PCI_HOST_FEATURES 0 42 43 /* A 32-bit r/w bitmask of features activated by the guest */ 44 #define VIRTIO_PCI_GUEST_FEATURES 4 45 46 /* A 32-bit r/w PFN for the currently selected queue */ 47 #define VIRTIO_PCI_QUEUE_PFN 8 48 49 /* A 16-bit r/o queue size for the currently selected queue */ 50 #define VIRTIO_PCI_QUEUE_NUM 12 51 52 /* A 16-bit r/w queue selector */ 53 #define VIRTIO_PCI_QUEUE_SEL 14 54 55 /* A 16-bit r/w queue notifier */ 56 #define VIRTIO_PCI_QUEUE_NOTIFY 16 57 58 /* An 8-bit device status register. */ 59 #define VIRTIO_PCI_STATUS 18 60 61 /* An 8-bit r/o interrupt status register. Reading the value will return the 62 * current contents of the ISR and will also clear it. This is effectively 63 * a read-and-acknowledge. */ 64 #define VIRTIO_PCI_ISR 19 65 66 /* MSI-X registers: only enabled if MSI-X is enabled. */ 67 /* A 16-bit vector for configuration changes. */ 68 #define VIRTIO_MSI_CONFIG_VECTOR 20 69 /* A 16-bit vector for selected queue notifications. */ 70 #define VIRTIO_MSI_QUEUE_VECTOR 22 71 72 /* Config space size */ 73 #define VIRTIO_PCI_CONFIG_NOMSI 20 74 #define VIRTIO_PCI_CONFIG_MSI 24 75 #define VIRTIO_PCI_REGION_SIZE(dev) (msix_present(dev) ? \ 76 VIRTIO_PCI_CONFIG_MSI : \ 77 VIRTIO_PCI_CONFIG_NOMSI) 78 79 /* The remaining space is defined by each driver as the per-driver 80 * configuration space */ 81 #define VIRTIO_PCI_CONFIG(dev) (msix_enabled(dev) ? \ 82 VIRTIO_PCI_CONFIG_MSI : \ 83 VIRTIO_PCI_CONFIG_NOMSI) 84 85 /* How many bits to shift physical queue address written to QUEUE_PFN. 86 * 12 is historical, and due to x86 page size. */ 87 #define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12 88 89 /* Flags track per-device state like workarounds for quirks in older guests. */ 90 #define VIRTIO_PCI_FLAG_BUS_MASTER_BUG (1 << 0) 91 92 /* HACK for virtio to determine if it's running a big endian guest */ 93 bool virtio_is_big_endian(void); 94 95 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size, 96 VirtIOPCIProxy *dev); 97 98 /* virtio device */ 99 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */ 100 static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d) 101 { 102 return container_of(d, VirtIOPCIProxy, pci_dev.qdev); 103 } 104 105 /* DeviceState to VirtIOPCIProxy. Note: used on datapath, 106 * be careful and test performance if you change this. 107 */ 108 static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d) 109 { 110 return container_of(d, VirtIOPCIProxy, pci_dev.qdev); 111 } 112 113 static void virtio_pci_notify(DeviceState *d, uint16_t vector) 114 { 115 VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d); 116 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 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) 258 { 259 VirtIOPCIProxy *proxy = opaque; 260 VirtIODevice *vdev = proxy->vdev; 261 hwaddr pa; 262 263 switch (addr) { 264 case VIRTIO_PCI_GUEST_FEATURES: 265 /* Guest does not negotiate properly? We have to assume nothing. */ 266 if (val & (1 << VIRTIO_F_BAD_FEATURE)) { 267 val = virtio_bus_get_vdev_bad_features(&proxy->bus); 268 } 269 virtio_set_features(vdev, val); 270 break; 271 case VIRTIO_PCI_QUEUE_PFN: 272 pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT; 273 if (pa == 0) { 274 virtio_pci_stop_ioeventfd(proxy); 275 virtio_reset(proxy->vdev); 276 msix_unuse_all_vectors(&proxy->pci_dev); 277 } 278 else 279 virtio_queue_set_addr(vdev, vdev->queue_sel, pa); 280 break; 281 case VIRTIO_PCI_QUEUE_SEL: 282 if (val < VIRTIO_PCI_QUEUE_MAX) 283 vdev->queue_sel = val; 284 break; 285 case VIRTIO_PCI_QUEUE_NOTIFY: 286 if (val < VIRTIO_PCI_QUEUE_MAX) { 287 virtio_queue_notify(vdev, val); 288 } 289 break; 290 case VIRTIO_PCI_STATUS: 291 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) { 292 virtio_pci_stop_ioeventfd(proxy); 293 } 294 295 virtio_set_status(vdev, val & 0xFF); 296 297 if (val & VIRTIO_CONFIG_S_DRIVER_OK) { 298 virtio_pci_start_ioeventfd(proxy); 299 } 300 301 if (vdev->status == 0) { 302 virtio_reset(proxy->vdev); 303 msix_unuse_all_vectors(&proxy->pci_dev); 304 } 305 306 /* Linux before 2.6.34 sets the device as OK without enabling 307 the PCI device bus master bit. In this case we need to disable 308 some safety checks. */ 309 if ((val & VIRTIO_CONFIG_S_DRIVER_OK) && 310 !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { 311 proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; 312 } 313 break; 314 case VIRTIO_MSI_CONFIG_VECTOR: 315 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); 316 /* Make it possible for guest to discover an error took place. */ 317 if (msix_vector_use(&proxy->pci_dev, val) < 0) 318 val = VIRTIO_NO_VECTOR; 319 vdev->config_vector = val; 320 break; 321 case VIRTIO_MSI_QUEUE_VECTOR: 322 msix_vector_unuse(&proxy->pci_dev, 323 virtio_queue_vector(vdev, vdev->queue_sel)); 324 /* Make it possible for guest to discover an error took place. */ 325 if (msix_vector_use(&proxy->pci_dev, val) < 0) 326 val = VIRTIO_NO_VECTOR; 327 virtio_queue_set_vector(vdev, vdev->queue_sel, val); 328 break; 329 default: 330 error_report("%s: unexpected address 0x%x value 0x%x", 331 __func__, addr, val); 332 break; 333 } 334 } 335 336 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr) 337 { 338 VirtIODevice *vdev = proxy->vdev; 339 uint32_t ret = 0xFFFFFFFF; 340 341 switch (addr) { 342 case VIRTIO_PCI_HOST_FEATURES: 343 ret = proxy->host_features; 344 break; 345 case VIRTIO_PCI_GUEST_FEATURES: 346 ret = vdev->guest_features; 347 break; 348 case VIRTIO_PCI_QUEUE_PFN: 349 ret = virtio_queue_get_addr(vdev, vdev->queue_sel) 350 >> VIRTIO_PCI_QUEUE_ADDR_SHIFT; 351 break; 352 case VIRTIO_PCI_QUEUE_NUM: 353 ret = virtio_queue_get_num(vdev, vdev->queue_sel); 354 break; 355 case VIRTIO_PCI_QUEUE_SEL: 356 ret = vdev->queue_sel; 357 break; 358 case VIRTIO_PCI_STATUS: 359 ret = vdev->status; 360 break; 361 case VIRTIO_PCI_ISR: 362 /* reading from the ISR also clears it. */ 363 ret = vdev->isr; 364 vdev->isr = 0; 365 qemu_set_irq(proxy->pci_dev.irq[0], 0); 366 break; 367 case VIRTIO_MSI_CONFIG_VECTOR: 368 ret = vdev->config_vector; 369 break; 370 case VIRTIO_MSI_QUEUE_VECTOR: 371 ret = virtio_queue_vector(vdev, vdev->queue_sel); 372 break; 373 default: 374 break; 375 } 376 377 return ret; 378 } 379 380 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr, 381 unsigned size) 382 { 383 VirtIOPCIProxy *proxy = opaque; 384 uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); 385 uint64_t val = 0; 386 if (addr < config) { 387 return virtio_ioport_read(proxy, addr); 388 } 389 addr -= config; 390 391 switch (size) { 392 case 1: 393 val = virtio_config_readb(proxy->vdev, addr); 394 break; 395 case 2: 396 val = virtio_config_readw(proxy->vdev, addr); 397 if (virtio_is_big_endian()) { 398 val = bswap16(val); 399 } 400 break; 401 case 4: 402 val = virtio_config_readl(proxy->vdev, addr); 403 if (virtio_is_big_endian()) { 404 val = bswap32(val); 405 } 406 break; 407 } 408 return val; 409 } 410 411 static void virtio_pci_config_write(void *opaque, hwaddr addr, 412 uint64_t val, unsigned size) 413 { 414 VirtIOPCIProxy *proxy = opaque; 415 uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); 416 if (addr < config) { 417 virtio_ioport_write(proxy, addr, val); 418 return; 419 } 420 addr -= config; 421 /* 422 * Virtio-PCI is odd. Ioports are LE but config space is target native 423 * endian. 424 */ 425 switch (size) { 426 case 1: 427 virtio_config_writeb(proxy->vdev, addr, val); 428 break; 429 case 2: 430 if (virtio_is_big_endian()) { 431 val = bswap16(val); 432 } 433 virtio_config_writew(proxy->vdev, addr, val); 434 break; 435 case 4: 436 if (virtio_is_big_endian()) { 437 val = bswap32(val); 438 } 439 virtio_config_writel(proxy->vdev, addr, val); 440 break; 441 } 442 } 443 444 static const MemoryRegionOps virtio_pci_config_ops = { 445 .read = virtio_pci_config_read, 446 .write = virtio_pci_config_write, 447 .impl = { 448 .min_access_size = 1, 449 .max_access_size = 4, 450 }, 451 .endianness = DEVICE_LITTLE_ENDIAN, 452 }; 453 454 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, 455 uint32_t val, int len) 456 { 457 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); 458 459 pci_default_write_config(pci_dev, address, val, len); 460 461 if (range_covers_byte(address, len, PCI_COMMAND) && 462 !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) && 463 !(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) { 464 virtio_pci_stop_ioeventfd(proxy); 465 virtio_set_status(proxy->vdev, 466 proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); 467 } 468 } 469 470 static unsigned virtio_pci_get_features(DeviceState *d) 471 { 472 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 473 return proxy->host_features; 474 } 475 476 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, 477 unsigned int queue_no, 478 unsigned int vector, 479 MSIMessage msg) 480 { 481 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 482 int ret; 483 484 if (irqfd->users == 0) { 485 ret = kvm_irqchip_add_msi_route(kvm_state, msg); 486 if (ret < 0) { 487 return ret; 488 } 489 irqfd->virq = ret; 490 } 491 irqfd->users++; 492 return 0; 493 } 494 495 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, 496 unsigned int vector) 497 { 498 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 499 if (--irqfd->users == 0) { 500 kvm_irqchip_release_virq(kvm_state, irqfd->virq); 501 } 502 } 503 504 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy, 505 unsigned int queue_no, 506 unsigned int vector) 507 { 508 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 509 VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); 510 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 511 int ret; 512 ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, NULL, irqfd->virq); 513 return ret; 514 } 515 516 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy, 517 unsigned int queue_no, 518 unsigned int vector) 519 { 520 VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); 521 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 522 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 523 int ret; 524 525 ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq); 526 assert(ret == 0); 527 } 528 529 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs) 530 { 531 PCIDevice *dev = &proxy->pci_dev; 532 VirtIODevice *vdev = proxy->vdev; 533 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 534 unsigned int vector; 535 int ret, queue_no; 536 MSIMessage msg; 537 538 for (queue_no = 0; queue_no < nvqs; queue_no++) { 539 if (!virtio_queue_get_num(vdev, queue_no)) { 540 break; 541 } 542 vector = virtio_queue_vector(vdev, queue_no); 543 if (vector >= msix_nr_vectors_allocated(dev)) { 544 continue; 545 } 546 msg = msix_get_message(dev, vector); 547 ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg); 548 if (ret < 0) { 549 goto undo; 550 } 551 /* If guest supports masking, set up irqfd now. 552 * Otherwise, delay until unmasked in the frontend. 553 */ 554 if (k->guest_notifier_mask) { 555 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); 556 if (ret < 0) { 557 kvm_virtio_pci_vq_vector_release(proxy, vector); 558 goto undo; 559 } 560 } 561 } 562 return 0; 563 564 undo: 565 while (--queue_no >= 0) { 566 vector = virtio_queue_vector(vdev, queue_no); 567 if (vector >= msix_nr_vectors_allocated(dev)) { 568 continue; 569 } 570 if (k->guest_notifier_mask) { 571 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 572 } 573 kvm_virtio_pci_vq_vector_release(proxy, vector); 574 } 575 return ret; 576 } 577 578 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs) 579 { 580 PCIDevice *dev = &proxy->pci_dev; 581 VirtIODevice *vdev = proxy->vdev; 582 unsigned int vector; 583 int queue_no; 584 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 585 586 for (queue_no = 0; queue_no < nvqs; queue_no++) { 587 if (!virtio_queue_get_num(vdev, queue_no)) { 588 break; 589 } 590 vector = virtio_queue_vector(vdev, queue_no); 591 if (vector >= msix_nr_vectors_allocated(dev)) { 592 continue; 593 } 594 /* If guest supports masking, clean up irqfd now. 595 * Otherwise, it was cleaned when masked in the frontend. 596 */ 597 if (k->guest_notifier_mask) { 598 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 599 } 600 kvm_virtio_pci_vq_vector_release(proxy, vector); 601 } 602 } 603 604 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy, 605 unsigned int queue_no, 606 unsigned int vector, 607 MSIMessage msg) 608 { 609 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(proxy->vdev); 610 VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); 611 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 612 VirtIOIRQFD *irqfd; 613 int ret = 0; 614 615 if (proxy->vector_irqfd) { 616 irqfd = &proxy->vector_irqfd[vector]; 617 if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) { 618 ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg); 619 if (ret < 0) { 620 return ret; 621 } 622 } 623 } 624 625 /* If guest supports masking, irqfd is already setup, unmask it. 626 * Otherwise, set it up now. 627 */ 628 if (k->guest_notifier_mask) { 629 k->guest_notifier_mask(proxy->vdev, queue_no, false); 630 /* Test after unmasking to avoid losing events. */ 631 if (k->guest_notifier_pending && 632 k->guest_notifier_pending(proxy->vdev, queue_no)) { 633 event_notifier_set(n); 634 } 635 } else { 636 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); 637 } 638 return ret; 639 } 640 641 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy, 642 unsigned int queue_no, 643 unsigned int vector) 644 { 645 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(proxy->vdev); 646 647 /* If guest supports masking, keep irqfd but mask it. 648 * Otherwise, clean it up now. 649 */ 650 if (k->guest_notifier_mask) { 651 k->guest_notifier_mask(proxy->vdev, queue_no, true); 652 } else { 653 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 654 } 655 } 656 657 static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector, 658 MSIMessage msg) 659 { 660 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 661 VirtIODevice *vdev = proxy->vdev; 662 int ret, queue_no; 663 664 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { 665 if (!virtio_queue_get_num(vdev, queue_no)) { 666 break; 667 } 668 if (virtio_queue_vector(vdev, queue_no) != vector) { 669 continue; 670 } 671 ret = virtio_pci_vq_vector_unmask(proxy, queue_no, vector, msg); 672 if (ret < 0) { 673 goto undo; 674 } 675 } 676 return 0; 677 678 undo: 679 while (--queue_no >= 0) { 680 if (virtio_queue_vector(vdev, queue_no) != vector) { 681 continue; 682 } 683 virtio_pci_vq_vector_mask(proxy, queue_no, vector); 684 } 685 return ret; 686 } 687 688 static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector) 689 { 690 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 691 VirtIODevice *vdev = proxy->vdev; 692 int queue_no; 693 694 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { 695 if (!virtio_queue_get_num(vdev, queue_no)) { 696 break; 697 } 698 if (virtio_queue_vector(vdev, queue_no) != vector) { 699 continue; 700 } 701 virtio_pci_vq_vector_mask(proxy, queue_no, vector); 702 } 703 } 704 705 static void virtio_pci_vector_poll(PCIDevice *dev, 706 unsigned int vector_start, 707 unsigned int vector_end) 708 { 709 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 710 VirtIODevice *vdev = proxy->vdev; 711 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(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 (k->guest_notifier_pending) { 729 if (k->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 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(proxy->vdev); 743 VirtQueue *vq = virtio_get_queue(proxy->vdev, n); 744 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 745 746 if (assign) { 747 int r = event_notifier_init(notifier, 0); 748 if (r < 0) { 749 return r; 750 } 751 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); 752 } else { 753 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); 754 event_notifier_cleanup(notifier); 755 } 756 757 if (!msix_enabled(&proxy->pci_dev) && vdc->guest_notifier_mask) { 758 vdc->guest_notifier_mask(proxy->vdev, n, !assign); 759 } 760 761 return 0; 762 } 763 764 static bool virtio_pci_query_guest_notifiers(DeviceState *d) 765 { 766 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 767 return msix_enabled(&proxy->pci_dev); 768 } 769 770 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign) 771 { 772 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 773 VirtIODevice *vdev = proxy->vdev; 774 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 775 int r, n; 776 bool with_irqfd = msix_enabled(&proxy->pci_dev) && 777 kvm_msi_via_irqfd_enabled(); 778 779 nvqs = MIN(nvqs, VIRTIO_PCI_QUEUE_MAX); 780 781 /* When deassigning, pass a consistent nvqs value 782 * to avoid leaking notifiers. 783 */ 784 assert(assign || nvqs == proxy->nvqs_with_notifiers); 785 786 proxy->nvqs_with_notifiers = nvqs; 787 788 /* Must unset vector notifier while guest notifier is still assigned */ 789 if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) { 790 msix_unset_vector_notifiers(&proxy->pci_dev); 791 if (proxy->vector_irqfd) { 792 kvm_virtio_pci_vector_release(proxy, nvqs); 793 g_free(proxy->vector_irqfd); 794 proxy->vector_irqfd = NULL; 795 } 796 } 797 798 for (n = 0; n < nvqs; n++) { 799 if (!virtio_queue_get_num(vdev, n)) { 800 break; 801 } 802 803 r = virtio_pci_set_guest_notifier(d, n, assign, 804 kvm_msi_via_irqfd_enabled()); 805 if (r < 0) { 806 goto assign_error; 807 } 808 } 809 810 /* Must set vector notifier after guest notifier has been assigned */ 811 if ((with_irqfd || k->guest_notifier_mask) && assign) { 812 if (with_irqfd) { 813 proxy->vector_irqfd = 814 g_malloc0(sizeof(*proxy->vector_irqfd) * 815 msix_nr_vectors_allocated(&proxy->pci_dev)); 816 r = kvm_virtio_pci_vector_use(proxy, nvqs); 817 if (r < 0) { 818 goto assign_error; 819 } 820 } 821 r = msix_set_vector_notifiers(&proxy->pci_dev, 822 virtio_pci_vector_unmask, 823 virtio_pci_vector_mask, 824 virtio_pci_vector_poll); 825 if (r < 0) { 826 goto notifiers_error; 827 } 828 } 829 830 return 0; 831 832 notifiers_error: 833 if (with_irqfd) { 834 assert(assign); 835 kvm_virtio_pci_vector_release(proxy, nvqs); 836 } 837 838 assign_error: 839 /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */ 840 assert(assign); 841 while (--n >= 0) { 842 virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd); 843 } 844 return r; 845 } 846 847 static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign) 848 { 849 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 850 851 /* Stop using ioeventfd for virtqueue kick if the device starts using host 852 * notifiers. This makes it easy to avoid stepping on each others' toes. 853 */ 854 proxy->ioeventfd_disabled = assign; 855 if (assign) { 856 virtio_pci_stop_ioeventfd(proxy); 857 } 858 /* We don't need to start here: it's not needed because backend 859 * currently only stops on status change away from ok, 860 * reset, vmstop and such. If we do add code to start here, 861 * need to check vmstate, device state etc. */ 862 return virtio_pci_set_host_notifier_internal(proxy, n, assign, false); 863 } 864 865 static void virtio_pci_vmstate_change(DeviceState *d, bool running) 866 { 867 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 868 869 if (running) { 870 /* Try to find out if the guest has bus master disabled, but is 871 in ready state. Then we have a buggy guest OS. */ 872 if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) && 873 !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { 874 proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; 875 } 876 virtio_pci_start_ioeventfd(proxy); 877 } else { 878 virtio_pci_stop_ioeventfd(proxy); 879 } 880 } 881 882 #ifdef CONFIG_VIRTFS 883 static int virtio_9p_init_pci(VirtIOPCIProxy *vpci_dev) 884 { 885 V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev); 886 DeviceState *vdev = DEVICE(&dev->vdev); 887 888 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 889 if (qdev_init(vdev) < 0) { 890 return -1; 891 } 892 return 0; 893 } 894 895 static Property virtio_9p_pci_properties[] = { 896 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 897 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 898 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 899 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 900 DEFINE_VIRTIO_9P_PROPERTIES(V9fsPCIState, vdev.fsconf), 901 DEFINE_PROP_END_OF_LIST(), 902 }; 903 904 static void virtio_9p_pci_class_init(ObjectClass *klass, void *data) 905 { 906 DeviceClass *dc = DEVICE_CLASS(klass); 907 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 908 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 909 910 k->init = virtio_9p_init_pci; 911 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 912 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P; 913 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 914 pcidev_k->class_id = 0x2; 915 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 916 dc->props = virtio_9p_pci_properties; 917 } 918 919 static void virtio_9p_pci_instance_init(Object *obj) 920 { 921 V9fsPCIState *dev = VIRTIO_9P_PCI(obj); 922 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_9P); 923 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 924 } 925 926 static const TypeInfo virtio_9p_pci_info = { 927 .name = TYPE_VIRTIO_9P_PCI, 928 .parent = TYPE_VIRTIO_PCI, 929 .instance_size = sizeof(V9fsPCIState), 930 .instance_init = virtio_9p_pci_instance_init, 931 .class_init = virtio_9p_pci_class_init, 932 }; 933 #endif /* CONFIG_VIRTFS */ 934 935 /* 936 * virtio-pci: This is the PCIDevice which has a virtio-pci-bus. 937 */ 938 939 /* This is called by virtio-bus just after the device is plugged. */ 940 static void virtio_pci_device_plugged(DeviceState *d) 941 { 942 VirtIOPCIProxy *proxy = VIRTIO_PCI(d); 943 VirtioBusState *bus = &proxy->bus; 944 uint8_t *config; 945 uint32_t size; 946 947 proxy->vdev = bus->vdev; 948 949 config = proxy->pci_dev.config; 950 if (proxy->class_code) { 951 pci_config_set_class(config, proxy->class_code); 952 } 953 pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID, 954 pci_get_word(config + PCI_VENDOR_ID)); 955 pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus)); 956 config[PCI_INTERRUPT_PIN] = 1; 957 958 if (proxy->nvectors && 959 msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1)) { 960 proxy->nvectors = 0; 961 } 962 963 proxy->pci_dev.config_write = virtio_write_config; 964 965 size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) 966 + virtio_bus_get_vdev_config_len(bus); 967 if (size & (size - 1)) { 968 size = 1 << qemu_fls(size); 969 } 970 971 memory_region_init_io(&proxy->bar, OBJECT(proxy), &virtio_pci_config_ops, 972 proxy, "virtio-pci", size); 973 pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, 974 &proxy->bar); 975 976 if (!kvm_has_many_ioeventfds()) { 977 proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; 978 } 979 980 proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY; 981 proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE; 982 proxy->host_features = virtio_bus_get_vdev_features(bus, 983 proxy->host_features); 984 } 985 986 static int virtio_pci_init(PCIDevice *pci_dev) 987 { 988 VirtIOPCIProxy *dev = VIRTIO_PCI(pci_dev); 989 VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev); 990 virtio_pci_bus_new(&dev->bus, sizeof(dev->bus), dev); 991 if (k->init != NULL) { 992 return k->init(dev); 993 } 994 return 0; 995 } 996 997 static void virtio_pci_exit(PCIDevice *pci_dev) 998 { 999 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev); 1000 virtio_pci_stop_ioeventfd(proxy); 1001 memory_region_destroy(&proxy->bar); 1002 msix_uninit_exclusive_bar(pci_dev); 1003 } 1004 1005 static void virtio_pci_reset(DeviceState *qdev) 1006 { 1007 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev); 1008 VirtioBusState *bus = VIRTIO_BUS(&proxy->bus); 1009 virtio_pci_stop_ioeventfd(proxy); 1010 virtio_bus_reset(bus); 1011 msix_unuse_all_vectors(&proxy->pci_dev); 1012 proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG; 1013 } 1014 1015 static void virtio_pci_class_init(ObjectClass *klass, void *data) 1016 { 1017 DeviceClass *dc = DEVICE_CLASS(klass); 1018 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 1019 1020 k->init = virtio_pci_init; 1021 k->exit = virtio_pci_exit; 1022 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1023 k->revision = VIRTIO_PCI_ABI_VERSION; 1024 k->class_id = PCI_CLASS_OTHERS; 1025 dc->reset = virtio_pci_reset; 1026 } 1027 1028 static const TypeInfo virtio_pci_info = { 1029 .name = TYPE_VIRTIO_PCI, 1030 .parent = TYPE_PCI_DEVICE, 1031 .instance_size = sizeof(VirtIOPCIProxy), 1032 .class_init = virtio_pci_class_init, 1033 .class_size = sizeof(VirtioPCIClass), 1034 .abstract = true, 1035 }; 1036 1037 /* virtio-blk-pci */ 1038 1039 static Property virtio_blk_pci_properties[] = { 1040 DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), 1041 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1042 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1043 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 1044 #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 1045 DEFINE_PROP_BIT("x-data-plane", VirtIOBlkPCI, blk.data_plane, 0, false), 1046 #endif 1047 DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features), 1048 DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkPCI, blk), 1049 DEFINE_PROP_END_OF_LIST(), 1050 }; 1051 1052 static int virtio_blk_pci_init(VirtIOPCIProxy *vpci_dev) 1053 { 1054 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev); 1055 DeviceState *vdev = DEVICE(&dev->vdev); 1056 virtio_blk_set_conf(vdev, &(dev->blk)); 1057 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1058 if (qdev_init(vdev) < 0) { 1059 return -1; 1060 } 1061 return 0; 1062 } 1063 1064 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data) 1065 { 1066 DeviceClass *dc = DEVICE_CLASS(klass); 1067 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1068 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1069 1070 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1071 dc->props = virtio_blk_pci_properties; 1072 k->init = virtio_blk_pci_init; 1073 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1074 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; 1075 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1076 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 1077 } 1078 1079 static void virtio_blk_pci_instance_init(Object *obj) 1080 { 1081 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj); 1082 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BLK); 1083 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1084 } 1085 1086 static const TypeInfo virtio_blk_pci_info = { 1087 .name = TYPE_VIRTIO_BLK_PCI, 1088 .parent = TYPE_VIRTIO_PCI, 1089 .instance_size = sizeof(VirtIOBlkPCI), 1090 .instance_init = virtio_blk_pci_instance_init, 1091 .class_init = virtio_blk_pci_class_init, 1092 }; 1093 1094 /* virtio-scsi-pci */ 1095 1096 static Property virtio_scsi_pci_properties[] = { 1097 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1098 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1099 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 1100 DEV_NVECTORS_UNSPECIFIED), 1101 DEFINE_VIRTIO_SCSI_FEATURES(VirtIOPCIProxy, host_features), 1102 DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSIPCI, vdev.parent_obj.conf), 1103 DEFINE_PROP_END_OF_LIST(), 1104 }; 1105 1106 static int virtio_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev) 1107 { 1108 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev); 1109 DeviceState *vdev = DEVICE(&dev->vdev); 1110 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); 1111 DeviceState *proxy = DEVICE(vpci_dev); 1112 char *bus_name; 1113 1114 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 1115 vpci_dev->nvectors = vs->conf.num_queues + 3; 1116 } 1117 1118 /* 1119 * For command line compatibility, this sets the virtio-scsi-device bus 1120 * name as before. 1121 */ 1122 if (proxy->id) { 1123 bus_name = g_strdup_printf("%s.0", proxy->id); 1124 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 1125 g_free(bus_name); 1126 } 1127 1128 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1129 if (qdev_init(vdev) < 0) { 1130 return -1; 1131 } 1132 return 0; 1133 } 1134 1135 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data) 1136 { 1137 DeviceClass *dc = DEVICE_CLASS(klass); 1138 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1139 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1140 k->init = virtio_scsi_pci_init_pci; 1141 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1142 dc->props = virtio_scsi_pci_properties; 1143 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1144 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 1145 pcidev_k->revision = 0x00; 1146 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 1147 } 1148 1149 static void virtio_scsi_pci_instance_init(Object *obj) 1150 { 1151 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj); 1152 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SCSI); 1153 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1154 } 1155 1156 static const TypeInfo virtio_scsi_pci_info = { 1157 .name = TYPE_VIRTIO_SCSI_PCI, 1158 .parent = TYPE_VIRTIO_PCI, 1159 .instance_size = sizeof(VirtIOSCSIPCI), 1160 .instance_init = virtio_scsi_pci_instance_init, 1161 .class_init = virtio_scsi_pci_class_init, 1162 }; 1163 1164 /* vhost-scsi-pci */ 1165 1166 #ifdef CONFIG_VHOST_SCSI 1167 static Property vhost_scsi_pci_properties[] = { 1168 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 1169 DEV_NVECTORS_UNSPECIFIED), 1170 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1171 DEFINE_VHOST_SCSI_PROPERTIES(VHostSCSIPCI, vdev.parent_obj.conf), 1172 DEFINE_PROP_END_OF_LIST(), 1173 }; 1174 1175 static int vhost_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev) 1176 { 1177 VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev); 1178 DeviceState *vdev = DEVICE(&dev->vdev); 1179 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); 1180 1181 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 1182 vpci_dev->nvectors = vs->conf.num_queues + 3; 1183 } 1184 1185 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1186 if (qdev_init(vdev) < 0) { 1187 return -1; 1188 } 1189 return 0; 1190 } 1191 1192 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data) 1193 { 1194 DeviceClass *dc = DEVICE_CLASS(klass); 1195 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1196 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1197 k->init = vhost_scsi_pci_init_pci; 1198 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1199 dc->props = vhost_scsi_pci_properties; 1200 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1201 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 1202 pcidev_k->revision = 0x00; 1203 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 1204 } 1205 1206 static void vhost_scsi_pci_instance_init(Object *obj) 1207 { 1208 VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj); 1209 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VHOST_SCSI); 1210 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1211 } 1212 1213 static const TypeInfo vhost_scsi_pci_info = { 1214 .name = TYPE_VHOST_SCSI_PCI, 1215 .parent = TYPE_VIRTIO_PCI, 1216 .instance_size = sizeof(VHostSCSIPCI), 1217 .instance_init = vhost_scsi_pci_instance_init, 1218 .class_init = vhost_scsi_pci_class_init, 1219 }; 1220 #endif 1221 1222 /* virtio-balloon-pci */ 1223 1224 static void balloon_pci_stats_get_all(Object *obj, struct Visitor *v, 1225 void *opaque, const char *name, 1226 Error **errp) 1227 { 1228 VirtIOBalloonPCI *dev = opaque; 1229 object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp); 1230 } 1231 1232 static void balloon_pci_stats_get_poll_interval(Object *obj, struct Visitor *v, 1233 void *opaque, const char *name, 1234 Error **errp) 1235 { 1236 VirtIOBalloonPCI *dev = opaque; 1237 object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 1238 errp); 1239 } 1240 1241 static void balloon_pci_stats_set_poll_interval(Object *obj, struct Visitor *v, 1242 void *opaque, const char *name, 1243 Error **errp) 1244 { 1245 VirtIOBalloonPCI *dev = opaque; 1246 object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 1247 errp); 1248 } 1249 1250 static Property virtio_balloon_pci_properties[] = { 1251 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1252 DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), 1253 DEFINE_PROP_END_OF_LIST(), 1254 }; 1255 1256 static int virtio_balloon_pci_init(VirtIOPCIProxy *vpci_dev) 1257 { 1258 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev); 1259 DeviceState *vdev = DEVICE(&dev->vdev); 1260 1261 if (vpci_dev->class_code != PCI_CLASS_OTHERS && 1262 vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */ 1263 vpci_dev->class_code = PCI_CLASS_OTHERS; 1264 } 1265 1266 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1267 if (qdev_init(vdev) < 0) { 1268 return -1; 1269 } 1270 return 0; 1271 } 1272 1273 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data) 1274 { 1275 DeviceClass *dc = DEVICE_CLASS(klass); 1276 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1277 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1278 k->init = virtio_balloon_pci_init; 1279 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 1280 dc->props = virtio_balloon_pci_properties; 1281 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1282 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON; 1283 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1284 pcidev_k->class_id = PCI_CLASS_OTHERS; 1285 } 1286 1287 static void virtio_balloon_pci_instance_init(Object *obj) 1288 { 1289 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj); 1290 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BALLOON); 1291 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1292 1293 object_property_add(obj, "guest-stats", "guest statistics", 1294 balloon_pci_stats_get_all, NULL, NULL, dev, 1295 NULL); 1296 1297 object_property_add(obj, "guest-stats-polling-interval", "int", 1298 balloon_pci_stats_get_poll_interval, 1299 balloon_pci_stats_set_poll_interval, 1300 NULL, dev, NULL); 1301 } 1302 1303 static const TypeInfo virtio_balloon_pci_info = { 1304 .name = TYPE_VIRTIO_BALLOON_PCI, 1305 .parent = TYPE_VIRTIO_PCI, 1306 .instance_size = sizeof(VirtIOBalloonPCI), 1307 .instance_init = virtio_balloon_pci_instance_init, 1308 .class_init = virtio_balloon_pci_class_init, 1309 }; 1310 1311 /* virtio-serial-pci */ 1312 1313 static int virtio_serial_pci_init(VirtIOPCIProxy *vpci_dev) 1314 { 1315 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev); 1316 DeviceState *vdev = DEVICE(&dev->vdev); 1317 DeviceState *proxy = DEVICE(vpci_dev); 1318 char *bus_name; 1319 1320 if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER && 1321 vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */ 1322 vpci_dev->class_code != PCI_CLASS_OTHERS) { /* qemu-kvm */ 1323 vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER; 1324 } 1325 1326 /* backwards-compatibility with machines that were created with 1327 DEV_NVECTORS_UNSPECIFIED */ 1328 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 1329 vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1; 1330 } 1331 1332 /* 1333 * For command line compatibility, this sets the virtio-serial-device bus 1334 * name as before. 1335 */ 1336 if (proxy->id) { 1337 bus_name = g_strdup_printf("%s.0", proxy->id); 1338 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 1339 g_free(bus_name); 1340 } 1341 1342 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1343 if (qdev_init(vdev) < 0) { 1344 return -1; 1345 } 1346 return 0; 1347 } 1348 1349 static Property virtio_serial_pci_properties[] = { 1350 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1351 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1352 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 1353 DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), 1354 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1355 DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtIOSerialPCI, vdev.serial), 1356 DEFINE_PROP_END_OF_LIST(), 1357 }; 1358 1359 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data) 1360 { 1361 DeviceClass *dc = DEVICE_CLASS(klass); 1362 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1363 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1364 k->init = virtio_serial_pci_init; 1365 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 1366 dc->props = virtio_serial_pci_properties; 1367 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1368 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE; 1369 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1370 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER; 1371 } 1372 1373 static void virtio_serial_pci_instance_init(Object *obj) 1374 { 1375 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj); 1376 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL); 1377 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1378 } 1379 1380 static const TypeInfo virtio_serial_pci_info = { 1381 .name = TYPE_VIRTIO_SERIAL_PCI, 1382 .parent = TYPE_VIRTIO_PCI, 1383 .instance_size = sizeof(VirtIOSerialPCI), 1384 .instance_init = virtio_serial_pci_instance_init, 1385 .class_init = virtio_serial_pci_class_init, 1386 }; 1387 1388 /* virtio-net-pci */ 1389 1390 static Property virtio_net_properties[] = { 1391 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1392 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false), 1393 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), 1394 DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features), 1395 DEFINE_NIC_PROPERTIES(VirtIONetPCI, vdev.nic_conf), 1396 DEFINE_VIRTIO_NET_PROPERTIES(VirtIONetPCI, vdev.net_conf), 1397 DEFINE_PROP_END_OF_LIST(), 1398 }; 1399 1400 static int virtio_net_pci_init(VirtIOPCIProxy *vpci_dev) 1401 { 1402 DeviceState *qdev = DEVICE(vpci_dev); 1403 VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev); 1404 DeviceState *vdev = DEVICE(&dev->vdev); 1405 1406 virtio_net_set_config_size(&dev->vdev, vpci_dev->host_features); 1407 virtio_net_set_netclient_name(&dev->vdev, qdev->id, 1408 object_get_typename(OBJECT(qdev))); 1409 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1410 if (qdev_init(vdev) < 0) { 1411 return -1; 1412 } 1413 return 0; 1414 } 1415 1416 static void virtio_net_pci_class_init(ObjectClass *klass, void *data) 1417 { 1418 DeviceClass *dc = DEVICE_CLASS(klass); 1419 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 1420 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass); 1421 1422 k->romfile = "efi-virtio.rom"; 1423 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1424 k->device_id = PCI_DEVICE_ID_VIRTIO_NET; 1425 k->revision = VIRTIO_PCI_ABI_VERSION; 1426 k->class_id = PCI_CLASS_NETWORK_ETHERNET; 1427 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 1428 dc->props = virtio_net_properties; 1429 vpciklass->init = virtio_net_pci_init; 1430 } 1431 1432 static void virtio_net_pci_instance_init(Object *obj) 1433 { 1434 VirtIONetPCI *dev = VIRTIO_NET_PCI(obj); 1435 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_NET); 1436 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1437 } 1438 1439 static const TypeInfo virtio_net_pci_info = { 1440 .name = TYPE_VIRTIO_NET_PCI, 1441 .parent = TYPE_VIRTIO_PCI, 1442 .instance_size = sizeof(VirtIONetPCI), 1443 .instance_init = virtio_net_pci_instance_init, 1444 .class_init = virtio_net_pci_class_init, 1445 }; 1446 1447 /* virtio-rng-pci */ 1448 1449 static Property virtio_rng_pci_properties[] = { 1450 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1451 DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORngPCI, vdev.conf), 1452 DEFINE_PROP_END_OF_LIST(), 1453 }; 1454 1455 static int virtio_rng_pci_init(VirtIOPCIProxy *vpci_dev) 1456 { 1457 VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev); 1458 DeviceState *vdev = DEVICE(&vrng->vdev); 1459 1460 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1461 if (qdev_init(vdev) < 0) { 1462 return -1; 1463 } 1464 1465 object_property_set_link(OBJECT(vrng), 1466 OBJECT(vrng->vdev.conf.rng), "rng", 1467 NULL); 1468 1469 return 0; 1470 } 1471 1472 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data) 1473 { 1474 DeviceClass *dc = DEVICE_CLASS(klass); 1475 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1476 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1477 1478 k->init = virtio_rng_pci_init; 1479 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 1480 dc->props = virtio_rng_pci_properties; 1481 1482 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1483 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG; 1484 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1485 pcidev_k->class_id = PCI_CLASS_OTHERS; 1486 } 1487 1488 static void virtio_rng_initfn(Object *obj) 1489 { 1490 VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj); 1491 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_RNG); 1492 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1493 object_property_add_link(obj, "rng", TYPE_RNG_BACKEND, 1494 (Object **)&dev->vdev.conf.rng, NULL); 1495 1496 } 1497 1498 static const TypeInfo virtio_rng_pci_info = { 1499 .name = TYPE_VIRTIO_RNG_PCI, 1500 .parent = TYPE_VIRTIO_PCI, 1501 .instance_size = sizeof(VirtIORngPCI), 1502 .instance_init = virtio_rng_initfn, 1503 .class_init = virtio_rng_pci_class_init, 1504 }; 1505 1506 /* virtio-pci-bus */ 1507 1508 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size, 1509 VirtIOPCIProxy *dev) 1510 { 1511 DeviceState *qdev = DEVICE(dev); 1512 BusState *qbus; 1513 char virtio_bus_name[] = "virtio-bus"; 1514 1515 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev, 1516 virtio_bus_name); 1517 qbus = BUS(bus); 1518 qbus->allow_hotplug = 1; 1519 } 1520 1521 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data) 1522 { 1523 BusClass *bus_class = BUS_CLASS(klass); 1524 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 1525 bus_class->max_dev = 1; 1526 k->notify = virtio_pci_notify; 1527 k->save_config = virtio_pci_save_config; 1528 k->load_config = virtio_pci_load_config; 1529 k->save_queue = virtio_pci_save_queue; 1530 k->load_queue = virtio_pci_load_queue; 1531 k->get_features = virtio_pci_get_features; 1532 k->query_guest_notifiers = virtio_pci_query_guest_notifiers; 1533 k->set_host_notifier = virtio_pci_set_host_notifier; 1534 k->set_guest_notifiers = virtio_pci_set_guest_notifiers; 1535 k->vmstate_change = virtio_pci_vmstate_change; 1536 k->device_plugged = virtio_pci_device_plugged; 1537 } 1538 1539 static const TypeInfo virtio_pci_bus_info = { 1540 .name = TYPE_VIRTIO_PCI_BUS, 1541 .parent = TYPE_VIRTIO_BUS, 1542 .instance_size = sizeof(VirtioPCIBusState), 1543 .class_init = virtio_pci_bus_class_init, 1544 }; 1545 1546 static void virtio_pci_register_types(void) 1547 { 1548 type_register_static(&virtio_rng_pci_info); 1549 type_register_static(&virtio_pci_bus_info); 1550 type_register_static(&virtio_pci_info); 1551 #ifdef CONFIG_VIRTFS 1552 type_register_static(&virtio_9p_pci_info); 1553 #endif 1554 type_register_static(&virtio_blk_pci_info); 1555 type_register_static(&virtio_scsi_pci_info); 1556 type_register_static(&virtio_balloon_pci_info); 1557 type_register_static(&virtio_serial_pci_info); 1558 type_register_static(&virtio_net_pci_info); 1559 #ifdef CONFIG_VHOST_SCSI 1560 type_register_static(&vhost_scsi_pci_info); 1561 #endif 1562 } 1563 1564 type_init(virtio_pci_register_types) 1565