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