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