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 /* QEMU doesn't strictly need write barriers since everything runs in 93 * lock-step. We'll leave the calls to wmb() in though to make it obvious for 94 * KVM or if kqemu gets SMP support. 95 */ 96 #define wmb() do { } while (0) 97 98 /* HACK for virtio to determine if it's running a big endian guest */ 99 bool virtio_is_big_endian(void); 100 101 static void virtio_pci_bus_new(VirtioBusState *bus, VirtIOPCIProxy *dev); 102 103 /* virtio device */ 104 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */ 105 static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d) 106 { 107 return container_of(d, VirtIOPCIProxy, pci_dev.qdev); 108 } 109 110 /* DeviceState to VirtIOPCIProxy. Note: used on datapath, 111 * be careful and test performance if you change this. 112 */ 113 static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d) 114 { 115 return container_of(d, VirtIOPCIProxy, pci_dev.qdev); 116 } 117 118 static void virtio_pci_notify(DeviceState *d, uint16_t vector) 119 { 120 VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d); 121 if (msix_enabled(&proxy->pci_dev)) 122 msix_notify(&proxy->pci_dev, vector); 123 else 124 qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1); 125 } 126 127 static void virtio_pci_save_config(DeviceState *d, QEMUFile *f) 128 { 129 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 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, proxy->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 if (msix_present(&proxy->pci_dev)) 140 qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n)); 141 } 142 143 static int virtio_pci_load_config(DeviceState *d, QEMUFile *f) 144 { 145 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 146 int ret; 147 ret = pci_device_load(&proxy->pci_dev, f); 148 if (ret) { 149 return ret; 150 } 151 msix_unuse_all_vectors(&proxy->pci_dev); 152 msix_load(&proxy->pci_dev, f); 153 if (msix_present(&proxy->pci_dev)) { 154 qemu_get_be16s(f, &proxy->vdev->config_vector); 155 } else { 156 proxy->vdev->config_vector = VIRTIO_NO_VECTOR; 157 } 158 if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) { 159 return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector); 160 } 161 return 0; 162 } 163 164 static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f) 165 { 166 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 167 uint16_t vector; 168 if (msix_present(&proxy->pci_dev)) { 169 qemu_get_be16s(f, &vector); 170 } else { 171 vector = VIRTIO_NO_VECTOR; 172 } 173 virtio_queue_set_vector(proxy->vdev, n, vector); 174 if (vector != VIRTIO_NO_VECTOR) { 175 return msix_vector_use(&proxy->pci_dev, vector); 176 } 177 return 0; 178 } 179 180 static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy, 181 int n, bool assign, bool set_handler) 182 { 183 VirtQueue *vq = virtio_get_queue(proxy->vdev, n); 184 EventNotifier *notifier = virtio_queue_get_host_notifier(vq); 185 int r = 0; 186 187 if (assign) { 188 r = event_notifier_init(notifier, 1); 189 if (r < 0) { 190 error_report("%s: unable to init event notifier: %d", 191 __func__, r); 192 return r; 193 } 194 virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler); 195 memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2, 196 true, n, notifier); 197 } else { 198 memory_region_del_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2, 199 true, n, notifier); 200 virtio_queue_set_host_notifier_fd_handler(vq, false, false); 201 event_notifier_cleanup(notifier); 202 } 203 return r; 204 } 205 206 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy) 207 { 208 int n, r; 209 210 if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) || 211 proxy->ioeventfd_disabled || 212 proxy->ioeventfd_started) { 213 return; 214 } 215 216 for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { 217 if (!virtio_queue_get_num(proxy->vdev, n)) { 218 continue; 219 } 220 221 r = virtio_pci_set_host_notifier_internal(proxy, n, true, true); 222 if (r < 0) { 223 goto assign_error; 224 } 225 } 226 proxy->ioeventfd_started = true; 227 return; 228 229 assign_error: 230 while (--n >= 0) { 231 if (!virtio_queue_get_num(proxy->vdev, n)) { 232 continue; 233 } 234 235 r = virtio_pci_set_host_notifier_internal(proxy, n, false, false); 236 assert(r >= 0); 237 } 238 proxy->ioeventfd_started = false; 239 error_report("%s: failed. Fallback to a userspace (slower).", __func__); 240 } 241 242 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy) 243 { 244 int r; 245 int n; 246 247 if (!proxy->ioeventfd_started) { 248 return; 249 } 250 251 for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { 252 if (!virtio_queue_get_num(proxy->vdev, n)) { 253 continue; 254 } 255 256 r = virtio_pci_set_host_notifier_internal(proxy, n, false, false); 257 assert(r >= 0); 258 } 259 proxy->ioeventfd_started = false; 260 } 261 262 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) 263 { 264 VirtIOPCIProxy *proxy = opaque; 265 VirtIODevice *vdev = proxy->vdev; 266 hwaddr pa; 267 268 switch (addr) { 269 case VIRTIO_PCI_GUEST_FEATURES: 270 /* Guest does not negotiate properly? We have to assume nothing. */ 271 if (val & (1 << VIRTIO_F_BAD_FEATURE)) { 272 val = virtio_bus_get_vdev_bad_features(&proxy->bus); 273 } 274 virtio_set_features(vdev, val); 275 break; 276 case VIRTIO_PCI_QUEUE_PFN: 277 pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT; 278 if (pa == 0) { 279 virtio_pci_stop_ioeventfd(proxy); 280 virtio_reset(proxy->vdev); 281 msix_unuse_all_vectors(&proxy->pci_dev); 282 } 283 else 284 virtio_queue_set_addr(vdev, vdev->queue_sel, pa); 285 break; 286 case VIRTIO_PCI_QUEUE_SEL: 287 if (val < VIRTIO_PCI_QUEUE_MAX) 288 vdev->queue_sel = val; 289 break; 290 case VIRTIO_PCI_QUEUE_NOTIFY: 291 if (val < VIRTIO_PCI_QUEUE_MAX) { 292 virtio_queue_notify(vdev, val); 293 } 294 break; 295 case VIRTIO_PCI_STATUS: 296 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) { 297 virtio_pci_stop_ioeventfd(proxy); 298 } 299 300 virtio_set_status(vdev, val & 0xFF); 301 302 if (val & VIRTIO_CONFIG_S_DRIVER_OK) { 303 virtio_pci_start_ioeventfd(proxy); 304 } 305 306 if (vdev->status == 0) { 307 virtio_reset(proxy->vdev); 308 msix_unuse_all_vectors(&proxy->pci_dev); 309 } 310 311 /* Linux before 2.6.34 sets the device as OK without enabling 312 the PCI device bus master bit. In this case we need to disable 313 some safety checks. */ 314 if ((val & VIRTIO_CONFIG_S_DRIVER_OK) && 315 !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { 316 proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; 317 } 318 break; 319 case VIRTIO_MSI_CONFIG_VECTOR: 320 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); 321 /* Make it possible for guest to discover an error took place. */ 322 if (msix_vector_use(&proxy->pci_dev, val) < 0) 323 val = VIRTIO_NO_VECTOR; 324 vdev->config_vector = val; 325 break; 326 case VIRTIO_MSI_QUEUE_VECTOR: 327 msix_vector_unuse(&proxy->pci_dev, 328 virtio_queue_vector(vdev, vdev->queue_sel)); 329 /* Make it possible for guest to discover an error took place. */ 330 if (msix_vector_use(&proxy->pci_dev, val) < 0) 331 val = VIRTIO_NO_VECTOR; 332 virtio_queue_set_vector(vdev, vdev->queue_sel, val); 333 break; 334 default: 335 error_report("%s: unexpected address 0x%x value 0x%x", 336 __func__, addr, val); 337 break; 338 } 339 } 340 341 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr) 342 { 343 VirtIODevice *vdev = proxy->vdev; 344 uint32_t ret = 0xFFFFFFFF; 345 346 switch (addr) { 347 case VIRTIO_PCI_HOST_FEATURES: 348 ret = proxy->host_features; 349 break; 350 case VIRTIO_PCI_GUEST_FEATURES: 351 ret = vdev->guest_features; 352 break; 353 case VIRTIO_PCI_QUEUE_PFN: 354 ret = virtio_queue_get_addr(vdev, vdev->queue_sel) 355 >> VIRTIO_PCI_QUEUE_ADDR_SHIFT; 356 break; 357 case VIRTIO_PCI_QUEUE_NUM: 358 ret = virtio_queue_get_num(vdev, vdev->queue_sel); 359 break; 360 case VIRTIO_PCI_QUEUE_SEL: 361 ret = vdev->queue_sel; 362 break; 363 case VIRTIO_PCI_STATUS: 364 ret = vdev->status; 365 break; 366 case VIRTIO_PCI_ISR: 367 /* reading from the ISR also clears it. */ 368 ret = vdev->isr; 369 vdev->isr = 0; 370 qemu_set_irq(proxy->pci_dev.irq[0], 0); 371 break; 372 case VIRTIO_MSI_CONFIG_VECTOR: 373 ret = vdev->config_vector; 374 break; 375 case VIRTIO_MSI_QUEUE_VECTOR: 376 ret = virtio_queue_vector(vdev, vdev->queue_sel); 377 break; 378 default: 379 break; 380 } 381 382 return ret; 383 } 384 385 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr, 386 unsigned size) 387 { 388 VirtIOPCIProxy *proxy = opaque; 389 uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); 390 uint64_t val = 0; 391 if (addr < config) { 392 return virtio_ioport_read(proxy, addr); 393 } 394 addr -= config; 395 396 switch (size) { 397 case 1: 398 val = virtio_config_readb(proxy->vdev, addr); 399 break; 400 case 2: 401 val = virtio_config_readw(proxy->vdev, addr); 402 if (virtio_is_big_endian()) { 403 val = bswap16(val); 404 } 405 break; 406 case 4: 407 val = virtio_config_readl(proxy->vdev, addr); 408 if (virtio_is_big_endian()) { 409 val = bswap32(val); 410 } 411 break; 412 } 413 return val; 414 } 415 416 static void virtio_pci_config_write(void *opaque, hwaddr addr, 417 uint64_t val, unsigned size) 418 { 419 VirtIOPCIProxy *proxy = opaque; 420 uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); 421 if (addr < config) { 422 virtio_ioport_write(proxy, addr, val); 423 return; 424 } 425 addr -= config; 426 /* 427 * Virtio-PCI is odd. Ioports are LE but config space is target native 428 * endian. 429 */ 430 switch (size) { 431 case 1: 432 virtio_config_writeb(proxy->vdev, addr, val); 433 break; 434 case 2: 435 if (virtio_is_big_endian()) { 436 val = bswap16(val); 437 } 438 virtio_config_writew(proxy->vdev, addr, val); 439 break; 440 case 4: 441 if (virtio_is_big_endian()) { 442 val = bswap32(val); 443 } 444 virtio_config_writel(proxy->vdev, addr, val); 445 break; 446 } 447 } 448 449 static const MemoryRegionOps virtio_pci_config_ops = { 450 .read = virtio_pci_config_read, 451 .write = virtio_pci_config_write, 452 .impl = { 453 .min_access_size = 1, 454 .max_access_size = 4, 455 }, 456 .endianness = DEVICE_LITTLE_ENDIAN, 457 }; 458 459 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, 460 uint32_t val, int len) 461 { 462 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); 463 464 pci_default_write_config(pci_dev, address, val, len); 465 466 if (range_covers_byte(address, len, PCI_COMMAND) && 467 !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) && 468 !(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) { 469 virtio_pci_stop_ioeventfd(proxy); 470 virtio_set_status(proxy->vdev, 471 proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); 472 } 473 } 474 475 static unsigned virtio_pci_get_features(DeviceState *d) 476 { 477 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 478 return proxy->host_features; 479 } 480 481 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, 482 unsigned int queue_no, 483 unsigned int vector, 484 MSIMessage msg) 485 { 486 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 487 int ret; 488 489 if (irqfd->users == 0) { 490 ret = kvm_irqchip_add_msi_route(kvm_state, msg); 491 if (ret < 0) { 492 return ret; 493 } 494 irqfd->virq = ret; 495 } 496 irqfd->users++; 497 return 0; 498 } 499 500 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, 501 unsigned int vector) 502 { 503 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 504 if (--irqfd->users == 0) { 505 kvm_irqchip_release_virq(kvm_state, irqfd->virq); 506 } 507 } 508 509 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy, 510 unsigned int queue_no, 511 unsigned int vector) 512 { 513 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 514 VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); 515 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 516 int ret; 517 ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, irqfd->virq); 518 return ret; 519 } 520 521 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy, 522 unsigned int queue_no, 523 unsigned int vector) 524 { 525 VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); 526 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 527 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 528 int ret; 529 530 ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq); 531 assert(ret == 0); 532 } 533 534 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs) 535 { 536 PCIDevice *dev = &proxy->pci_dev; 537 VirtIODevice *vdev = proxy->vdev; 538 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 539 unsigned int vector; 540 int ret, queue_no; 541 MSIMessage msg; 542 543 for (queue_no = 0; queue_no < nvqs; queue_no++) { 544 if (!virtio_queue_get_num(vdev, queue_no)) { 545 break; 546 } 547 vector = virtio_queue_vector(vdev, queue_no); 548 if (vector >= msix_nr_vectors_allocated(dev)) { 549 continue; 550 } 551 msg = msix_get_message(dev, vector); 552 ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg); 553 if (ret < 0) { 554 goto undo; 555 } 556 /* If guest supports masking, set up irqfd now. 557 * Otherwise, delay until unmasked in the frontend. 558 */ 559 if (k->guest_notifier_mask) { 560 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); 561 if (ret < 0) { 562 kvm_virtio_pci_vq_vector_release(proxy, vector); 563 goto undo; 564 } 565 } 566 } 567 return 0; 568 569 undo: 570 while (--queue_no >= 0) { 571 vector = virtio_queue_vector(vdev, queue_no); 572 if (vector >= msix_nr_vectors_allocated(dev)) { 573 continue; 574 } 575 if (k->guest_notifier_mask) { 576 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 577 } 578 kvm_virtio_pci_vq_vector_release(proxy, vector); 579 } 580 return ret; 581 } 582 583 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs) 584 { 585 PCIDevice *dev = &proxy->pci_dev; 586 VirtIODevice *vdev = proxy->vdev; 587 unsigned int vector; 588 int queue_no; 589 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 590 591 for (queue_no = 0; queue_no < nvqs; queue_no++) { 592 if (!virtio_queue_get_num(vdev, queue_no)) { 593 break; 594 } 595 vector = virtio_queue_vector(vdev, queue_no); 596 if (vector >= msix_nr_vectors_allocated(dev)) { 597 continue; 598 } 599 /* If guest supports masking, clean up irqfd now. 600 * Otherwise, it was cleaned when masked in the frontend. 601 */ 602 if (k->guest_notifier_mask) { 603 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 604 } 605 kvm_virtio_pci_vq_vector_release(proxy, vector); 606 } 607 } 608 609 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy, 610 unsigned int queue_no, 611 unsigned int vector, 612 MSIMessage msg) 613 { 614 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(proxy->vdev); 615 VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); 616 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 617 VirtIOIRQFD *irqfd; 618 int ret = 0; 619 620 if (proxy->vector_irqfd) { 621 irqfd = &proxy->vector_irqfd[vector]; 622 if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) { 623 ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg); 624 if (ret < 0) { 625 return ret; 626 } 627 } 628 } 629 630 /* If guest supports masking, irqfd is already setup, unmask it. 631 * Otherwise, set it up now. 632 */ 633 if (k->guest_notifier_mask) { 634 k->guest_notifier_mask(proxy->vdev, queue_no, false); 635 /* Test after unmasking to avoid losing events. */ 636 if (k->guest_notifier_pending && 637 k->guest_notifier_pending(proxy->vdev, queue_no)) { 638 event_notifier_set(n); 639 } 640 } else { 641 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); 642 } 643 return ret; 644 } 645 646 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy, 647 unsigned int queue_no, 648 unsigned int vector) 649 { 650 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(proxy->vdev); 651 652 /* If guest supports masking, keep irqfd but mask it. 653 * Otherwise, clean it up now. 654 */ 655 if (k->guest_notifier_mask) { 656 k->guest_notifier_mask(proxy->vdev, queue_no, true); 657 } else { 658 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 659 } 660 } 661 662 static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector, 663 MSIMessage msg) 664 { 665 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 666 VirtIODevice *vdev = proxy->vdev; 667 int ret, queue_no; 668 669 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { 670 if (!virtio_queue_get_num(vdev, queue_no)) { 671 break; 672 } 673 if (virtio_queue_vector(vdev, queue_no) != vector) { 674 continue; 675 } 676 ret = virtio_pci_vq_vector_unmask(proxy, queue_no, vector, msg); 677 if (ret < 0) { 678 goto undo; 679 } 680 } 681 return 0; 682 683 undo: 684 while (--queue_no >= 0) { 685 if (virtio_queue_vector(vdev, queue_no) != vector) { 686 continue; 687 } 688 virtio_pci_vq_vector_mask(proxy, queue_no, vector); 689 } 690 return ret; 691 } 692 693 static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector) 694 { 695 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 696 VirtIODevice *vdev = proxy->vdev; 697 int queue_no; 698 699 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { 700 if (!virtio_queue_get_num(vdev, queue_no)) { 701 break; 702 } 703 if (virtio_queue_vector(vdev, queue_no) != vector) { 704 continue; 705 } 706 virtio_pci_vq_vector_mask(proxy, queue_no, vector); 707 } 708 } 709 710 static void virtio_pci_vector_poll(PCIDevice *dev, 711 unsigned int vector_start, 712 unsigned int vector_end) 713 { 714 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 715 VirtIODevice *vdev = proxy->vdev; 716 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 717 int queue_no; 718 unsigned int vector; 719 EventNotifier *notifier; 720 VirtQueue *vq; 721 722 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { 723 if (!virtio_queue_get_num(vdev, queue_no)) { 724 break; 725 } 726 vector = virtio_queue_vector(vdev, queue_no); 727 if (vector < vector_start || vector >= vector_end || 728 !msix_is_masked(dev, vector)) { 729 continue; 730 } 731 vq = virtio_get_queue(vdev, queue_no); 732 notifier = virtio_queue_get_guest_notifier(vq); 733 if (k->guest_notifier_pending) { 734 if (k->guest_notifier_pending(vdev, queue_no)) { 735 msix_set_pending(dev, vector); 736 } 737 } else if (event_notifier_test_and_clear(notifier)) { 738 msix_set_pending(dev, vector); 739 } 740 } 741 } 742 743 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign, 744 bool with_irqfd) 745 { 746 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 747 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(proxy->vdev); 748 VirtQueue *vq = virtio_get_queue(proxy->vdev, n); 749 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 750 751 if (assign) { 752 int r = event_notifier_init(notifier, 0); 753 if (r < 0) { 754 return r; 755 } 756 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); 757 } else { 758 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); 759 event_notifier_cleanup(notifier); 760 } 761 762 if (!msix_enabled(&proxy->pci_dev) && vdc->guest_notifier_mask) { 763 vdc->guest_notifier_mask(proxy->vdev, n, !assign); 764 } 765 766 return 0; 767 } 768 769 static bool virtio_pci_query_guest_notifiers(DeviceState *d) 770 { 771 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 772 return msix_enabled(&proxy->pci_dev); 773 } 774 775 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign) 776 { 777 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 778 VirtIODevice *vdev = proxy->vdev; 779 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 780 int r, n; 781 bool with_irqfd = msix_enabled(&proxy->pci_dev) && 782 kvm_msi_via_irqfd_enabled(); 783 784 nvqs = MIN(nvqs, VIRTIO_PCI_QUEUE_MAX); 785 786 /* When deassigning, pass a consistent nvqs value 787 * to avoid leaking notifiers. 788 */ 789 assert(assign || nvqs == proxy->nvqs_with_notifiers); 790 791 proxy->nvqs_with_notifiers = nvqs; 792 793 /* Must unset vector notifier while guest notifier is still assigned */ 794 if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) { 795 msix_unset_vector_notifiers(&proxy->pci_dev); 796 if (proxy->vector_irqfd) { 797 kvm_virtio_pci_vector_release(proxy, nvqs); 798 g_free(proxy->vector_irqfd); 799 proxy->vector_irqfd = NULL; 800 } 801 } 802 803 for (n = 0; n < nvqs; n++) { 804 if (!virtio_queue_get_num(vdev, n)) { 805 break; 806 } 807 808 r = virtio_pci_set_guest_notifier(d, n, assign, 809 kvm_msi_via_irqfd_enabled()); 810 if (r < 0) { 811 goto assign_error; 812 } 813 } 814 815 /* Must set vector notifier after guest notifier has been assigned */ 816 if ((with_irqfd || k->guest_notifier_mask) && assign) { 817 if (with_irqfd) { 818 proxy->vector_irqfd = 819 g_malloc0(sizeof(*proxy->vector_irqfd) * 820 msix_nr_vectors_allocated(&proxy->pci_dev)); 821 r = kvm_virtio_pci_vector_use(proxy, nvqs); 822 if (r < 0) { 823 goto assign_error; 824 } 825 } 826 r = msix_set_vector_notifiers(&proxy->pci_dev, 827 virtio_pci_vector_unmask, 828 virtio_pci_vector_mask, 829 virtio_pci_vector_poll); 830 if (r < 0) { 831 goto notifiers_error; 832 } 833 } 834 835 return 0; 836 837 notifiers_error: 838 if (with_irqfd) { 839 assert(assign); 840 kvm_virtio_pci_vector_release(proxy, nvqs); 841 } 842 843 assign_error: 844 /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */ 845 assert(assign); 846 while (--n >= 0) { 847 virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd); 848 } 849 return r; 850 } 851 852 static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign) 853 { 854 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 855 856 /* Stop using ioeventfd for virtqueue kick if the device starts using host 857 * notifiers. This makes it easy to avoid stepping on each others' toes. 858 */ 859 proxy->ioeventfd_disabled = assign; 860 if (assign) { 861 virtio_pci_stop_ioeventfd(proxy); 862 } 863 /* We don't need to start here: it's not needed because backend 864 * currently only stops on status change away from ok, 865 * reset, vmstop and such. If we do add code to start here, 866 * need to check vmstate, device state etc. */ 867 return virtio_pci_set_host_notifier_internal(proxy, n, assign, false); 868 } 869 870 static void virtio_pci_vmstate_change(DeviceState *d, bool running) 871 { 872 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 873 874 if (running) { 875 /* Try to find out if the guest has bus master disabled, but is 876 in ready state. Then we have a buggy guest OS. */ 877 if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) && 878 !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { 879 proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; 880 } 881 virtio_pci_start_ioeventfd(proxy); 882 } else { 883 virtio_pci_stop_ioeventfd(proxy); 884 } 885 } 886 887 #ifdef CONFIG_VIRTFS 888 static int virtio_9p_init_pci(VirtIOPCIProxy *vpci_dev) 889 { 890 V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev); 891 DeviceState *vdev = DEVICE(&dev->vdev); 892 893 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 894 if (qdev_init(vdev) < 0) { 895 return -1; 896 } 897 return 0; 898 } 899 900 static Property virtio_9p_pci_properties[] = { 901 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 902 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 903 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 904 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 905 DEFINE_VIRTIO_9P_PROPERTIES(V9fsPCIState, vdev.fsconf), 906 DEFINE_PROP_END_OF_LIST(), 907 }; 908 909 static void virtio_9p_pci_class_init(ObjectClass *klass, void *data) 910 { 911 DeviceClass *dc = DEVICE_CLASS(klass); 912 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 913 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 914 915 k->init = virtio_9p_init_pci; 916 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 917 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P; 918 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 919 pcidev_k->class_id = 0x2; 920 dc->props = virtio_9p_pci_properties; 921 } 922 923 static void virtio_9p_pci_instance_init(Object *obj) 924 { 925 V9fsPCIState *dev = VIRTIO_9P_PCI(obj); 926 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_9P); 927 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 928 } 929 930 static const TypeInfo virtio_9p_pci_info = { 931 .name = TYPE_VIRTIO_9P_PCI, 932 .parent = TYPE_VIRTIO_PCI, 933 .instance_size = sizeof(V9fsPCIState), 934 .instance_init = virtio_9p_pci_instance_init, 935 .class_init = virtio_9p_pci_class_init, 936 }; 937 #endif /* CONFIG_VIRTFS */ 938 939 /* 940 * virtio-pci: This is the PCIDevice which has a virtio-pci-bus. 941 */ 942 943 /* This is called by virtio-bus just after the device is plugged. */ 944 static void virtio_pci_device_plugged(DeviceState *d) 945 { 946 VirtIOPCIProxy *proxy = VIRTIO_PCI(d); 947 VirtioBusState *bus = &proxy->bus; 948 uint8_t *config; 949 uint32_t size; 950 951 proxy->vdev = bus->vdev; 952 953 config = proxy->pci_dev.config; 954 if (proxy->class_code) { 955 pci_config_set_class(config, proxy->class_code); 956 } 957 pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID, 958 pci_get_word(config + PCI_VENDOR_ID)); 959 pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus)); 960 config[PCI_INTERRUPT_PIN] = 1; 961 962 if (proxy->nvectors && 963 msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1)) { 964 proxy->nvectors = 0; 965 } 966 967 proxy->pci_dev.config_write = virtio_write_config; 968 969 size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) 970 + virtio_bus_get_vdev_config_len(bus); 971 if (size & (size - 1)) { 972 size = 1 << qemu_fls(size); 973 } 974 975 memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy, 976 "virtio-pci", size); 977 pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, 978 &proxy->bar); 979 980 if (!kvm_has_many_ioeventfds()) { 981 proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; 982 } 983 984 proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY; 985 proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE; 986 proxy->host_features = virtio_bus_get_vdev_features(bus, 987 proxy->host_features); 988 } 989 990 static int virtio_pci_init(PCIDevice *pci_dev) 991 { 992 VirtIOPCIProxy *dev = VIRTIO_PCI(pci_dev); 993 VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev); 994 virtio_pci_bus_new(&dev->bus, dev); 995 if (k->init != NULL) { 996 return k->init(dev); 997 } 998 return 0; 999 } 1000 1001 static void virtio_pci_exit(PCIDevice *pci_dev) 1002 { 1003 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev); 1004 virtio_pci_stop_ioeventfd(proxy); 1005 memory_region_destroy(&proxy->bar); 1006 msix_uninit_exclusive_bar(pci_dev); 1007 } 1008 1009 static void virtio_pci_reset(DeviceState *qdev) 1010 { 1011 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev); 1012 VirtioBusState *bus = VIRTIO_BUS(&proxy->bus); 1013 virtio_pci_stop_ioeventfd(proxy); 1014 virtio_bus_reset(bus); 1015 msix_unuse_all_vectors(&proxy->pci_dev); 1016 proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG; 1017 } 1018 1019 static void virtio_pci_class_init(ObjectClass *klass, void *data) 1020 { 1021 DeviceClass *dc = DEVICE_CLASS(klass); 1022 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 1023 1024 k->init = virtio_pci_init; 1025 k->exit = virtio_pci_exit; 1026 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1027 k->revision = VIRTIO_PCI_ABI_VERSION; 1028 k->class_id = PCI_CLASS_OTHERS; 1029 dc->reset = virtio_pci_reset; 1030 } 1031 1032 static const TypeInfo virtio_pci_info = { 1033 .name = TYPE_VIRTIO_PCI, 1034 .parent = TYPE_PCI_DEVICE, 1035 .instance_size = sizeof(VirtIOPCIProxy), 1036 .class_init = virtio_pci_class_init, 1037 .class_size = sizeof(VirtioPCIClass), 1038 .abstract = true, 1039 }; 1040 1041 /* virtio-blk-pci */ 1042 1043 static Property virtio_blk_pci_properties[] = { 1044 DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), 1045 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1046 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1047 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 1048 #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 1049 DEFINE_PROP_BIT("x-data-plane", VirtIOBlkPCI, blk.data_plane, 0, false), 1050 #endif 1051 DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features), 1052 DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkPCI, blk), 1053 DEFINE_PROP_END_OF_LIST(), 1054 }; 1055 1056 static int virtio_blk_pci_init(VirtIOPCIProxy *vpci_dev) 1057 { 1058 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev); 1059 DeviceState *vdev = DEVICE(&dev->vdev); 1060 virtio_blk_set_conf(vdev, &(dev->blk)); 1061 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1062 if (qdev_init(vdev) < 0) { 1063 return -1; 1064 } 1065 return 0; 1066 } 1067 1068 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data) 1069 { 1070 DeviceClass *dc = DEVICE_CLASS(klass); 1071 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1072 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1073 1074 dc->props = virtio_blk_pci_properties; 1075 k->init = virtio_blk_pci_init; 1076 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1077 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; 1078 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1079 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 1080 } 1081 1082 static void virtio_blk_pci_instance_init(Object *obj) 1083 { 1084 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj); 1085 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BLK); 1086 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1087 } 1088 1089 static const TypeInfo virtio_blk_pci_info = { 1090 .name = TYPE_VIRTIO_BLK_PCI, 1091 .parent = TYPE_VIRTIO_PCI, 1092 .instance_size = sizeof(VirtIOBlkPCI), 1093 .instance_init = virtio_blk_pci_instance_init, 1094 .class_init = virtio_blk_pci_class_init, 1095 }; 1096 1097 /* virtio-scsi-pci */ 1098 1099 static Property virtio_scsi_pci_properties[] = { 1100 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1101 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1102 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 1103 DEV_NVECTORS_UNSPECIFIED), 1104 DEFINE_VIRTIO_SCSI_FEATURES(VirtIOPCIProxy, host_features), 1105 DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSIPCI, vdev.parent_obj.conf), 1106 DEFINE_PROP_END_OF_LIST(), 1107 }; 1108 1109 static int virtio_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev) 1110 { 1111 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev); 1112 DeviceState *vdev = DEVICE(&dev->vdev); 1113 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); 1114 DeviceState *proxy = DEVICE(vpci_dev); 1115 char *bus_name; 1116 1117 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 1118 vpci_dev->nvectors = vs->conf.num_queues + 3; 1119 } 1120 1121 /* 1122 * For command line compatibility, this sets the virtio-scsi-device bus 1123 * name as before. 1124 */ 1125 if (proxy->id) { 1126 bus_name = g_strdup_printf("%s.0", proxy->id); 1127 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 1128 g_free(bus_name); 1129 } 1130 1131 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1132 if (qdev_init(vdev) < 0) { 1133 return -1; 1134 } 1135 return 0; 1136 } 1137 1138 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data) 1139 { 1140 DeviceClass *dc = DEVICE_CLASS(klass); 1141 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1142 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1143 k->init = virtio_scsi_pci_init_pci; 1144 dc->props = virtio_scsi_pci_properties; 1145 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1146 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 1147 pcidev_k->revision = 0x00; 1148 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 1149 } 1150 1151 static void virtio_scsi_pci_instance_init(Object *obj) 1152 { 1153 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj); 1154 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SCSI); 1155 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1156 } 1157 1158 static const TypeInfo virtio_scsi_pci_info = { 1159 .name = TYPE_VIRTIO_SCSI_PCI, 1160 .parent = TYPE_VIRTIO_PCI, 1161 .instance_size = sizeof(VirtIOSCSIPCI), 1162 .instance_init = virtio_scsi_pci_instance_init, 1163 .class_init = virtio_scsi_pci_class_init, 1164 }; 1165 1166 /* vhost-scsi-pci */ 1167 1168 #ifdef CONFIG_VHOST_SCSI 1169 static Property vhost_scsi_pci_properties[] = { 1170 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 1171 DEV_NVECTORS_UNSPECIFIED), 1172 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1173 DEFINE_VHOST_SCSI_PROPERTIES(VHostSCSIPCI, vdev.parent_obj.conf), 1174 DEFINE_PROP_END_OF_LIST(), 1175 }; 1176 1177 static int vhost_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev) 1178 { 1179 VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev); 1180 DeviceState *vdev = DEVICE(&dev->vdev); 1181 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); 1182 1183 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 1184 vpci_dev->nvectors = vs->conf.num_queues + 3; 1185 } 1186 1187 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1188 if (qdev_init(vdev) < 0) { 1189 return -1; 1190 } 1191 return 0; 1192 } 1193 1194 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data) 1195 { 1196 DeviceClass *dc = DEVICE_CLASS(klass); 1197 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1198 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1199 k->init = vhost_scsi_pci_init_pci; 1200 dc->props = vhost_scsi_pci_properties; 1201 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1202 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 1203 pcidev_k->revision = 0x00; 1204 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 1205 } 1206 1207 static void vhost_scsi_pci_instance_init(Object *obj) 1208 { 1209 VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj); 1210 object_initialize(OBJECT(&dev->vdev), TYPE_VHOST_SCSI); 1211 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1212 } 1213 1214 static const TypeInfo vhost_scsi_pci_info = { 1215 .name = TYPE_VHOST_SCSI_PCI, 1216 .parent = TYPE_VIRTIO_PCI, 1217 .instance_size = sizeof(VHostSCSIPCI), 1218 .instance_init = vhost_scsi_pci_instance_init, 1219 .class_init = vhost_scsi_pci_class_init, 1220 }; 1221 #endif 1222 1223 /* virtio-balloon-pci */ 1224 1225 static void balloon_pci_stats_get_all(Object *obj, struct Visitor *v, 1226 void *opaque, const char *name, 1227 Error **errp) 1228 { 1229 VirtIOBalloonPCI *dev = opaque; 1230 object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp); 1231 } 1232 1233 static void balloon_pci_stats_get_poll_interval(Object *obj, struct Visitor *v, 1234 void *opaque, const char *name, 1235 Error **errp) 1236 { 1237 VirtIOBalloonPCI *dev = opaque; 1238 object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 1239 errp); 1240 } 1241 1242 static void balloon_pci_stats_set_poll_interval(Object *obj, struct Visitor *v, 1243 void *opaque, const char *name, 1244 Error **errp) 1245 { 1246 VirtIOBalloonPCI *dev = opaque; 1247 object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 1248 errp); 1249 } 1250 1251 static Property virtio_balloon_pci_properties[] = { 1252 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1253 DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), 1254 DEFINE_PROP_END_OF_LIST(), 1255 }; 1256 1257 static int virtio_balloon_pci_init(VirtIOPCIProxy *vpci_dev) 1258 { 1259 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev); 1260 DeviceState *vdev = DEVICE(&dev->vdev); 1261 1262 if (vpci_dev->class_code != PCI_CLASS_OTHERS && 1263 vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */ 1264 vpci_dev->class_code = PCI_CLASS_OTHERS; 1265 } 1266 1267 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1268 if (qdev_init(vdev) < 0) { 1269 return -1; 1270 } 1271 return 0; 1272 } 1273 1274 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data) 1275 { 1276 DeviceClass *dc = DEVICE_CLASS(klass); 1277 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1278 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1279 k->init = virtio_balloon_pci_init; 1280 dc->props = virtio_balloon_pci_properties; 1281 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1282 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON; 1283 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1284 pcidev_k->class_id = PCI_CLASS_OTHERS; 1285 } 1286 1287 static void virtio_balloon_pci_instance_init(Object *obj) 1288 { 1289 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj); 1290 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BALLOON); 1291 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1292 1293 object_property_add(obj, "guest-stats", "guest statistics", 1294 balloon_pci_stats_get_all, NULL, NULL, dev, 1295 NULL); 1296 1297 object_property_add(obj, "guest-stats-polling-interval", "int", 1298 balloon_pci_stats_get_poll_interval, 1299 balloon_pci_stats_set_poll_interval, 1300 NULL, dev, NULL); 1301 } 1302 1303 static const TypeInfo virtio_balloon_pci_info = { 1304 .name = TYPE_VIRTIO_BALLOON_PCI, 1305 .parent = TYPE_VIRTIO_PCI, 1306 .instance_size = sizeof(VirtIOBalloonPCI), 1307 .instance_init = virtio_balloon_pci_instance_init, 1308 .class_init = virtio_balloon_pci_class_init, 1309 }; 1310 1311 /* virtio-serial-pci */ 1312 1313 static int virtio_serial_pci_init(VirtIOPCIProxy *vpci_dev) 1314 { 1315 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev); 1316 DeviceState *vdev = DEVICE(&dev->vdev); 1317 DeviceState *proxy = DEVICE(vpci_dev); 1318 char *bus_name; 1319 1320 if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER && 1321 vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */ 1322 vpci_dev->class_code != PCI_CLASS_OTHERS) { /* qemu-kvm */ 1323 vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER; 1324 } 1325 1326 /* backwards-compatibility with machines that were created with 1327 DEV_NVECTORS_UNSPECIFIED */ 1328 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 1329 vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1; 1330 } 1331 1332 /* 1333 * For command line compatibility, this sets the virtio-serial-device bus 1334 * name as before. 1335 */ 1336 if (proxy->id) { 1337 bus_name = g_strdup_printf("%s.0", proxy->id); 1338 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 1339 g_free(bus_name); 1340 } 1341 1342 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1343 if (qdev_init(vdev) < 0) { 1344 return -1; 1345 } 1346 return 0; 1347 } 1348 1349 static Property virtio_serial_pci_properties[] = { 1350 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1351 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1352 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 1353 DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), 1354 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1355 DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtIOSerialPCI, vdev.serial), 1356 DEFINE_PROP_END_OF_LIST(), 1357 }; 1358 1359 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data) 1360 { 1361 DeviceClass *dc = DEVICE_CLASS(klass); 1362 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1363 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1364 k->init = virtio_serial_pci_init; 1365 dc->props = virtio_serial_pci_properties; 1366 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1367 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE; 1368 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1369 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER; 1370 } 1371 1372 static void virtio_serial_pci_instance_init(Object *obj) 1373 { 1374 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj); 1375 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SERIAL); 1376 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1377 } 1378 1379 static const TypeInfo virtio_serial_pci_info = { 1380 .name = TYPE_VIRTIO_SERIAL_PCI, 1381 .parent = TYPE_VIRTIO_PCI, 1382 .instance_size = sizeof(VirtIOSerialPCI), 1383 .instance_init = virtio_serial_pci_instance_init, 1384 .class_init = virtio_serial_pci_class_init, 1385 }; 1386 1387 /* virtio-net-pci */ 1388 1389 static Property virtio_net_properties[] = { 1390 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1391 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false), 1392 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), 1393 DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features), 1394 DEFINE_NIC_PROPERTIES(VirtIONetPCI, vdev.nic_conf), 1395 DEFINE_VIRTIO_NET_PROPERTIES(VirtIONetPCI, vdev.net_conf), 1396 DEFINE_PROP_END_OF_LIST(), 1397 }; 1398 1399 static int virtio_net_pci_init(VirtIOPCIProxy *vpci_dev) 1400 { 1401 DeviceState *qdev = DEVICE(vpci_dev); 1402 VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev); 1403 DeviceState *vdev = DEVICE(&dev->vdev); 1404 1405 virtio_net_set_config_size(&dev->vdev, vpci_dev->host_features); 1406 virtio_net_set_netclient_name(&dev->vdev, qdev->id, 1407 object_get_typename(OBJECT(qdev))); 1408 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1409 if (qdev_init(vdev) < 0) { 1410 return -1; 1411 } 1412 return 0; 1413 } 1414 1415 static void virtio_net_pci_class_init(ObjectClass *klass, void *data) 1416 { 1417 DeviceClass *dc = DEVICE_CLASS(klass); 1418 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 1419 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass); 1420 1421 k->romfile = "efi-virtio.rom"; 1422 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1423 k->device_id = PCI_DEVICE_ID_VIRTIO_NET; 1424 k->revision = VIRTIO_PCI_ABI_VERSION; 1425 k->class_id = PCI_CLASS_NETWORK_ETHERNET; 1426 dc->props = virtio_net_properties; 1427 vpciklass->init = virtio_net_pci_init; 1428 } 1429 1430 static void virtio_net_pci_instance_init(Object *obj) 1431 { 1432 VirtIONetPCI *dev = VIRTIO_NET_PCI(obj); 1433 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_NET); 1434 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1435 } 1436 1437 static const TypeInfo virtio_net_pci_info = { 1438 .name = TYPE_VIRTIO_NET_PCI, 1439 .parent = TYPE_VIRTIO_PCI, 1440 .instance_size = sizeof(VirtIONetPCI), 1441 .instance_init = virtio_net_pci_instance_init, 1442 .class_init = virtio_net_pci_class_init, 1443 }; 1444 1445 /* virtio-rng-pci */ 1446 1447 static Property virtio_rng_pci_properties[] = { 1448 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1449 DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORngPCI, vdev.conf), 1450 DEFINE_PROP_END_OF_LIST(), 1451 }; 1452 1453 static int virtio_rng_pci_init(VirtIOPCIProxy *vpci_dev) 1454 { 1455 VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev); 1456 DeviceState *vdev = DEVICE(&vrng->vdev); 1457 1458 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1459 if (qdev_init(vdev) < 0) { 1460 return -1; 1461 } 1462 1463 object_property_set_link(OBJECT(vrng), 1464 OBJECT(vrng->vdev.conf.default_backend), "rng", 1465 NULL); 1466 1467 return 0; 1468 } 1469 1470 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data) 1471 { 1472 DeviceClass *dc = DEVICE_CLASS(klass); 1473 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1474 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1475 1476 k->init = virtio_rng_pci_init; 1477 dc->props = virtio_rng_pci_properties; 1478 1479 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1480 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG; 1481 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1482 pcidev_k->class_id = PCI_CLASS_OTHERS; 1483 } 1484 1485 static void virtio_rng_initfn(Object *obj) 1486 { 1487 VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj); 1488 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_RNG); 1489 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1490 object_property_add_link(obj, "rng", TYPE_RNG_BACKEND, 1491 (Object **)&dev->vdev.conf.rng, NULL); 1492 1493 } 1494 1495 static const TypeInfo virtio_rng_pci_info = { 1496 .name = TYPE_VIRTIO_RNG_PCI, 1497 .parent = TYPE_VIRTIO_PCI, 1498 .instance_size = sizeof(VirtIORngPCI), 1499 .instance_init = virtio_rng_initfn, 1500 .class_init = virtio_rng_pci_class_init, 1501 }; 1502 1503 /* virtio-pci-bus */ 1504 1505 static void virtio_pci_bus_new(VirtioBusState *bus, VirtIOPCIProxy *dev) 1506 { 1507 DeviceState *qdev = DEVICE(dev); 1508 BusState *qbus; 1509 char virtio_bus_name[] = "virtio-bus"; 1510 1511 qbus_create_inplace((BusState *)bus, TYPE_VIRTIO_PCI_BUS, qdev, 1512 virtio_bus_name); 1513 qbus = BUS(bus); 1514 qbus->allow_hotplug = 1; 1515 } 1516 1517 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data) 1518 { 1519 BusClass *bus_class = BUS_CLASS(klass); 1520 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 1521 bus_class->max_dev = 1; 1522 k->notify = virtio_pci_notify; 1523 k->save_config = virtio_pci_save_config; 1524 k->load_config = virtio_pci_load_config; 1525 k->save_queue = virtio_pci_save_queue; 1526 k->load_queue = virtio_pci_load_queue; 1527 k->get_features = virtio_pci_get_features; 1528 k->query_guest_notifiers = virtio_pci_query_guest_notifiers; 1529 k->set_host_notifier = virtio_pci_set_host_notifier; 1530 k->set_guest_notifiers = virtio_pci_set_guest_notifiers; 1531 k->vmstate_change = virtio_pci_vmstate_change; 1532 k->device_plugged = virtio_pci_device_plugged; 1533 } 1534 1535 static const TypeInfo virtio_pci_bus_info = { 1536 .name = TYPE_VIRTIO_PCI_BUS, 1537 .parent = TYPE_VIRTIO_BUS, 1538 .instance_size = sizeof(VirtioPCIBusState), 1539 .class_init = virtio_pci_bus_class_init, 1540 }; 1541 1542 static void virtio_pci_register_types(void) 1543 { 1544 type_register_static(&virtio_rng_pci_info); 1545 type_register_static(&virtio_pci_bus_info); 1546 type_register_static(&virtio_pci_info); 1547 #ifdef CONFIG_VIRTFS 1548 type_register_static(&virtio_9p_pci_info); 1549 #endif 1550 type_register_static(&virtio_blk_pci_info); 1551 type_register_static(&virtio_scsi_pci_info); 1552 type_register_static(&virtio_balloon_pci_info); 1553 type_register_static(&virtio_serial_pci_info); 1554 type_register_static(&virtio_net_pci_info); 1555 #ifdef CONFIG_VHOST_SCSI 1556 type_register_static(&vhost_scsi_pci_info); 1557 #endif 1558 } 1559 1560 type_init(virtio_pci_register_types) 1561