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 VirtQueue *vq = virtio_get_queue(proxy->vdev, n); 748 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 749 750 if (assign) { 751 int r = event_notifier_init(notifier, 0); 752 if (r < 0) { 753 return r; 754 } 755 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); 756 } else { 757 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); 758 event_notifier_cleanup(notifier); 759 } 760 761 return 0; 762 } 763 764 static bool virtio_pci_query_guest_notifiers(DeviceState *d) 765 { 766 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 767 return msix_enabled(&proxy->pci_dev); 768 } 769 770 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign) 771 { 772 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 773 VirtIODevice *vdev = proxy->vdev; 774 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 775 int r, n; 776 bool with_irqfd = msix_enabled(&proxy->pci_dev) && 777 kvm_msi_via_irqfd_enabled(); 778 779 nvqs = MIN(nvqs, VIRTIO_PCI_QUEUE_MAX); 780 781 /* When deassigning, pass a consistent nvqs value 782 * to avoid leaking notifiers. 783 */ 784 assert(assign || nvqs == proxy->nvqs_with_notifiers); 785 786 proxy->nvqs_with_notifiers = nvqs; 787 788 /* Must unset vector notifier while guest notifier is still assigned */ 789 if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) { 790 msix_unset_vector_notifiers(&proxy->pci_dev); 791 if (proxy->vector_irqfd) { 792 kvm_virtio_pci_vector_release(proxy, nvqs); 793 g_free(proxy->vector_irqfd); 794 proxy->vector_irqfd = NULL; 795 } 796 } 797 798 for (n = 0; n < nvqs; n++) { 799 if (!virtio_queue_get_num(vdev, n)) { 800 break; 801 } 802 803 r = virtio_pci_set_guest_notifier(d, n, assign, 804 kvm_msi_via_irqfd_enabled()); 805 if (r < 0) { 806 goto assign_error; 807 } 808 } 809 810 /* Must set vector notifier after guest notifier has been assigned */ 811 if ((with_irqfd || k->guest_notifier_mask) && assign) { 812 if (with_irqfd) { 813 proxy->vector_irqfd = 814 g_malloc0(sizeof(*proxy->vector_irqfd) * 815 msix_nr_vectors_allocated(&proxy->pci_dev)); 816 r = kvm_virtio_pci_vector_use(proxy, nvqs); 817 if (r < 0) { 818 goto assign_error; 819 } 820 } 821 r = msix_set_vector_notifiers(&proxy->pci_dev, 822 virtio_pci_vector_unmask, 823 virtio_pci_vector_mask, 824 virtio_pci_vector_poll); 825 if (r < 0) { 826 goto notifiers_error; 827 } 828 } 829 830 return 0; 831 832 notifiers_error: 833 if (with_irqfd) { 834 assert(assign); 835 kvm_virtio_pci_vector_release(proxy, nvqs); 836 } 837 838 assign_error: 839 /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */ 840 assert(assign); 841 while (--n >= 0) { 842 virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd); 843 } 844 return r; 845 } 846 847 static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign) 848 { 849 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 850 851 /* Stop using ioeventfd for virtqueue kick if the device starts using host 852 * notifiers. This makes it easy to avoid stepping on each others' toes. 853 */ 854 proxy->ioeventfd_disabled = assign; 855 if (assign) { 856 virtio_pci_stop_ioeventfd(proxy); 857 } 858 /* We don't need to start here: it's not needed because backend 859 * currently only stops on status change away from ok, 860 * reset, vmstop and such. If we do add code to start here, 861 * need to check vmstate, device state etc. */ 862 return virtio_pci_set_host_notifier_internal(proxy, n, assign, false); 863 } 864 865 static void virtio_pci_vmstate_change(DeviceState *d, bool running) 866 { 867 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 868 869 if (running) { 870 /* Try to find out if the guest has bus master disabled, but is 871 in ready state. Then we have a buggy guest OS. */ 872 if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) && 873 !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { 874 proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; 875 } 876 virtio_pci_start_ioeventfd(proxy); 877 } else { 878 virtio_pci_stop_ioeventfd(proxy); 879 } 880 } 881 882 #ifdef CONFIG_VIRTFS 883 static int virtio_9p_init_pci(VirtIOPCIProxy *vpci_dev) 884 { 885 V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev); 886 DeviceState *vdev = DEVICE(&dev->vdev); 887 888 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 889 if (qdev_init(vdev) < 0) { 890 return -1; 891 } 892 return 0; 893 } 894 895 static Property virtio_9p_pci_properties[] = { 896 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 897 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 898 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 899 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 900 DEFINE_VIRTIO_9P_PROPERTIES(V9fsPCIState, vdev.fsconf), 901 DEFINE_PROP_END_OF_LIST(), 902 }; 903 904 static void virtio_9p_pci_class_init(ObjectClass *klass, void *data) 905 { 906 DeviceClass *dc = DEVICE_CLASS(klass); 907 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 908 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 909 910 k->init = virtio_9p_init_pci; 911 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 912 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P; 913 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 914 pcidev_k->class_id = 0x2; 915 dc->props = virtio_9p_pci_properties; 916 } 917 918 static void virtio_9p_pci_instance_init(Object *obj) 919 { 920 V9fsPCIState *dev = VIRTIO_9P_PCI(obj); 921 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_9P); 922 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 923 } 924 925 static const TypeInfo virtio_9p_pci_info = { 926 .name = TYPE_VIRTIO_9P_PCI, 927 .parent = TYPE_VIRTIO_PCI, 928 .instance_size = sizeof(V9fsPCIState), 929 .instance_init = virtio_9p_pci_instance_init, 930 .class_init = virtio_9p_pci_class_init, 931 }; 932 #endif /* CONFIG_VIRTFS */ 933 934 /* 935 * virtio-pci: This is the PCIDevice which has a virtio-pci-bus. 936 */ 937 938 /* This is called by virtio-bus just after the device is plugged. */ 939 static void virtio_pci_device_plugged(DeviceState *d) 940 { 941 VirtIOPCIProxy *proxy = VIRTIO_PCI(d); 942 VirtioBusState *bus = &proxy->bus; 943 uint8_t *config; 944 uint32_t size; 945 946 proxy->vdev = bus->vdev; 947 948 config = proxy->pci_dev.config; 949 if (proxy->class_code) { 950 pci_config_set_class(config, proxy->class_code); 951 } 952 pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID, 953 pci_get_word(config + PCI_VENDOR_ID)); 954 pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus)); 955 config[PCI_INTERRUPT_PIN] = 1; 956 957 if (proxy->nvectors && 958 msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1)) { 959 proxy->nvectors = 0; 960 } 961 962 proxy->pci_dev.config_write = virtio_write_config; 963 964 size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) 965 + virtio_bus_get_vdev_config_len(bus); 966 if (size & (size - 1)) { 967 size = 1 << qemu_fls(size); 968 } 969 970 memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy, 971 "virtio-pci", size); 972 pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, 973 &proxy->bar); 974 975 if (!kvm_has_many_ioeventfds()) { 976 proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; 977 } 978 979 proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY; 980 proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE; 981 proxy->host_features = virtio_bus_get_vdev_features(bus, 982 proxy->host_features); 983 } 984 985 static int virtio_pci_init(PCIDevice *pci_dev) 986 { 987 VirtIOPCIProxy *dev = VIRTIO_PCI(pci_dev); 988 VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev); 989 virtio_pci_bus_new(&dev->bus, dev); 990 if (k->init != NULL) { 991 return k->init(dev); 992 } 993 return 0; 994 } 995 996 static void virtio_pci_exit(PCIDevice *pci_dev) 997 { 998 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev); 999 virtio_pci_stop_ioeventfd(proxy); 1000 memory_region_destroy(&proxy->bar); 1001 msix_uninit_exclusive_bar(pci_dev); 1002 } 1003 1004 static void virtio_pci_reset(DeviceState *qdev) 1005 { 1006 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev); 1007 VirtioBusState *bus = VIRTIO_BUS(&proxy->bus); 1008 virtio_pci_stop_ioeventfd(proxy); 1009 virtio_bus_reset(bus); 1010 msix_unuse_all_vectors(&proxy->pci_dev); 1011 proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG; 1012 } 1013 1014 static void virtio_pci_class_init(ObjectClass *klass, void *data) 1015 { 1016 DeviceClass *dc = DEVICE_CLASS(klass); 1017 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 1018 1019 k->init = virtio_pci_init; 1020 k->exit = virtio_pci_exit; 1021 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1022 k->revision = VIRTIO_PCI_ABI_VERSION; 1023 k->class_id = PCI_CLASS_OTHERS; 1024 dc->reset = virtio_pci_reset; 1025 } 1026 1027 static const TypeInfo virtio_pci_info = { 1028 .name = TYPE_VIRTIO_PCI, 1029 .parent = TYPE_PCI_DEVICE, 1030 .instance_size = sizeof(VirtIOPCIProxy), 1031 .class_init = virtio_pci_class_init, 1032 .class_size = sizeof(VirtioPCIClass), 1033 .abstract = true, 1034 }; 1035 1036 /* virtio-blk-pci */ 1037 1038 static Property virtio_blk_pci_properties[] = { 1039 DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), 1040 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1041 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1042 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 1043 #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 1044 DEFINE_PROP_BIT("x-data-plane", VirtIOBlkPCI, blk.data_plane, 0, false), 1045 #endif 1046 DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features), 1047 DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkPCI, blk), 1048 DEFINE_PROP_END_OF_LIST(), 1049 }; 1050 1051 static int virtio_blk_pci_init(VirtIOPCIProxy *vpci_dev) 1052 { 1053 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev); 1054 DeviceState *vdev = DEVICE(&dev->vdev); 1055 virtio_blk_set_conf(vdev, &(dev->blk)); 1056 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1057 if (qdev_init(vdev) < 0) { 1058 return -1; 1059 } 1060 return 0; 1061 } 1062 1063 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data) 1064 { 1065 DeviceClass *dc = DEVICE_CLASS(klass); 1066 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1067 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1068 1069 dc->props = virtio_blk_pci_properties; 1070 k->init = virtio_blk_pci_init; 1071 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1072 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; 1073 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1074 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 1075 } 1076 1077 static void virtio_blk_pci_instance_init(Object *obj) 1078 { 1079 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj); 1080 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BLK); 1081 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1082 } 1083 1084 static const TypeInfo virtio_blk_pci_info = { 1085 .name = TYPE_VIRTIO_BLK_PCI, 1086 .parent = TYPE_VIRTIO_PCI, 1087 .instance_size = sizeof(VirtIOBlkPCI), 1088 .instance_init = virtio_blk_pci_instance_init, 1089 .class_init = virtio_blk_pci_class_init, 1090 }; 1091 1092 /* virtio-scsi-pci */ 1093 1094 static Property virtio_scsi_pci_properties[] = { 1095 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1096 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1097 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 1098 DEV_NVECTORS_UNSPECIFIED), 1099 DEFINE_VIRTIO_SCSI_FEATURES(VirtIOPCIProxy, host_features), 1100 DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSIPCI, vdev.parent_obj.conf), 1101 DEFINE_PROP_END_OF_LIST(), 1102 }; 1103 1104 static int virtio_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev) 1105 { 1106 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev); 1107 DeviceState *vdev = DEVICE(&dev->vdev); 1108 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); 1109 1110 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 1111 vpci_dev->nvectors = vs->conf.num_queues + 3; 1112 } 1113 1114 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1115 if (qdev_init(vdev) < 0) { 1116 return -1; 1117 } 1118 return 0; 1119 } 1120 1121 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data) 1122 { 1123 DeviceClass *dc = DEVICE_CLASS(klass); 1124 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1125 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1126 k->init = virtio_scsi_pci_init_pci; 1127 dc->props = virtio_scsi_pci_properties; 1128 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1129 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 1130 pcidev_k->revision = 0x00; 1131 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 1132 } 1133 1134 static void virtio_scsi_pci_instance_init(Object *obj) 1135 { 1136 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj); 1137 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SCSI); 1138 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1139 } 1140 1141 static const TypeInfo virtio_scsi_pci_info = { 1142 .name = TYPE_VIRTIO_SCSI_PCI, 1143 .parent = TYPE_VIRTIO_PCI, 1144 .instance_size = sizeof(VirtIOSCSIPCI), 1145 .instance_init = virtio_scsi_pci_instance_init, 1146 .class_init = virtio_scsi_pci_class_init, 1147 }; 1148 1149 /* vhost-scsi-pci */ 1150 1151 #ifdef CONFIG_VHOST_SCSI 1152 static Property vhost_scsi_pci_properties[] = { 1153 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 1154 DEV_NVECTORS_UNSPECIFIED), 1155 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1156 DEFINE_VHOST_SCSI_PROPERTIES(VHostSCSIPCI, vdev.parent_obj.conf), 1157 DEFINE_PROP_END_OF_LIST(), 1158 }; 1159 1160 static int vhost_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev) 1161 { 1162 VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev); 1163 DeviceState *vdev = DEVICE(&dev->vdev); 1164 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); 1165 1166 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 1167 vpci_dev->nvectors = vs->conf.num_queues + 3; 1168 } 1169 1170 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1171 if (qdev_init(vdev) < 0) { 1172 return -1; 1173 } 1174 return 0; 1175 } 1176 1177 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data) 1178 { 1179 DeviceClass *dc = DEVICE_CLASS(klass); 1180 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1181 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1182 k->init = vhost_scsi_pci_init_pci; 1183 dc->props = vhost_scsi_pci_properties; 1184 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1185 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 1186 pcidev_k->revision = 0x00; 1187 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 1188 } 1189 1190 static void vhost_scsi_pci_instance_init(Object *obj) 1191 { 1192 VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj); 1193 object_initialize(OBJECT(&dev->vdev), TYPE_VHOST_SCSI); 1194 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1195 } 1196 1197 static const TypeInfo vhost_scsi_pci_info = { 1198 .name = TYPE_VHOST_SCSI_PCI, 1199 .parent = TYPE_VIRTIO_PCI, 1200 .instance_size = sizeof(VHostSCSIPCI), 1201 .instance_init = vhost_scsi_pci_instance_init, 1202 .class_init = vhost_scsi_pci_class_init, 1203 }; 1204 #endif 1205 1206 /* virtio-balloon-pci */ 1207 1208 static void balloon_pci_stats_get_all(Object *obj, struct Visitor *v, 1209 void *opaque, const char *name, 1210 Error **errp) 1211 { 1212 VirtIOBalloonPCI *dev = opaque; 1213 object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp); 1214 } 1215 1216 static void balloon_pci_stats_get_poll_interval(Object *obj, struct Visitor *v, 1217 void *opaque, const char *name, 1218 Error **errp) 1219 { 1220 VirtIOBalloonPCI *dev = opaque; 1221 object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 1222 errp); 1223 } 1224 1225 static void balloon_pci_stats_set_poll_interval(Object *obj, struct Visitor *v, 1226 void *opaque, const char *name, 1227 Error **errp) 1228 { 1229 VirtIOBalloonPCI *dev = opaque; 1230 object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 1231 errp); 1232 } 1233 1234 static Property virtio_balloon_pci_properties[] = { 1235 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1236 DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), 1237 DEFINE_PROP_END_OF_LIST(), 1238 }; 1239 1240 static int virtio_balloon_pci_init(VirtIOPCIProxy *vpci_dev) 1241 { 1242 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev); 1243 DeviceState *vdev = DEVICE(&dev->vdev); 1244 1245 if (vpci_dev->class_code != PCI_CLASS_OTHERS && 1246 vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */ 1247 vpci_dev->class_code = PCI_CLASS_OTHERS; 1248 } 1249 1250 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1251 if (qdev_init(vdev) < 0) { 1252 return -1; 1253 } 1254 return 0; 1255 } 1256 1257 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data) 1258 { 1259 DeviceClass *dc = DEVICE_CLASS(klass); 1260 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1261 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1262 k->init = virtio_balloon_pci_init; 1263 dc->props = virtio_balloon_pci_properties; 1264 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1265 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON; 1266 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1267 pcidev_k->class_id = PCI_CLASS_OTHERS; 1268 } 1269 1270 static void virtio_balloon_pci_instance_init(Object *obj) 1271 { 1272 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj); 1273 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BALLOON); 1274 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1275 1276 object_property_add(obj, "guest-stats", "guest statistics", 1277 balloon_pci_stats_get_all, NULL, NULL, dev, 1278 NULL); 1279 1280 object_property_add(obj, "guest-stats-polling-interval", "int", 1281 balloon_pci_stats_get_poll_interval, 1282 balloon_pci_stats_set_poll_interval, 1283 NULL, dev, NULL); 1284 } 1285 1286 static const TypeInfo virtio_balloon_pci_info = { 1287 .name = TYPE_VIRTIO_BALLOON_PCI, 1288 .parent = TYPE_VIRTIO_PCI, 1289 .instance_size = sizeof(VirtIOBalloonPCI), 1290 .instance_init = virtio_balloon_pci_instance_init, 1291 .class_init = virtio_balloon_pci_class_init, 1292 }; 1293 1294 /* virtio-serial-pci */ 1295 1296 static int virtio_serial_pci_init(VirtIOPCIProxy *vpci_dev) 1297 { 1298 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev); 1299 DeviceState *vdev = DEVICE(&dev->vdev); 1300 1301 if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER && 1302 vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */ 1303 vpci_dev->class_code != PCI_CLASS_OTHERS) { /* qemu-kvm */ 1304 vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER; 1305 } 1306 1307 /* backwards-compatibility with machines that were created with 1308 DEV_NVECTORS_UNSPECIFIED */ 1309 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 1310 vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1; 1311 } 1312 1313 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1314 if (qdev_init(vdev) < 0) { 1315 return -1; 1316 } 1317 return 0; 1318 } 1319 1320 static Property virtio_serial_pci_properties[] = { 1321 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1322 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1323 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 1324 DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), 1325 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1326 DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtIOSerialPCI, vdev.serial), 1327 DEFINE_PROP_END_OF_LIST(), 1328 }; 1329 1330 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data) 1331 { 1332 DeviceClass *dc = DEVICE_CLASS(klass); 1333 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1334 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1335 k->init = virtio_serial_pci_init; 1336 dc->props = virtio_serial_pci_properties; 1337 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1338 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE; 1339 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1340 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER; 1341 } 1342 1343 static void virtio_serial_pci_instance_init(Object *obj) 1344 { 1345 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj); 1346 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SERIAL); 1347 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1348 } 1349 1350 static const TypeInfo virtio_serial_pci_info = { 1351 .name = TYPE_VIRTIO_SERIAL_PCI, 1352 .parent = TYPE_VIRTIO_PCI, 1353 .instance_size = sizeof(VirtIOSerialPCI), 1354 .instance_init = virtio_serial_pci_instance_init, 1355 .class_init = virtio_serial_pci_class_init, 1356 }; 1357 1358 /* virtio-net-pci */ 1359 1360 static Property virtio_net_properties[] = { 1361 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1362 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false), 1363 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), 1364 DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features), 1365 DEFINE_NIC_PROPERTIES(VirtIONetPCI, vdev.nic_conf), 1366 DEFINE_VIRTIO_NET_PROPERTIES(VirtIONetPCI, vdev.net_conf), 1367 DEFINE_PROP_END_OF_LIST(), 1368 }; 1369 1370 static int virtio_net_pci_init(VirtIOPCIProxy *vpci_dev) 1371 { 1372 VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev); 1373 DeviceState *vdev = DEVICE(&dev->vdev); 1374 1375 virtio_net_set_config_size(&dev->vdev, vpci_dev->host_features); 1376 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1377 if (qdev_init(vdev) < 0) { 1378 return -1; 1379 } 1380 return 0; 1381 } 1382 1383 static void virtio_net_pci_class_init(ObjectClass *klass, void *data) 1384 { 1385 DeviceClass *dc = DEVICE_CLASS(klass); 1386 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 1387 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass); 1388 1389 k->romfile = "efi-virtio.rom"; 1390 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1391 k->device_id = PCI_DEVICE_ID_VIRTIO_NET; 1392 k->revision = VIRTIO_PCI_ABI_VERSION; 1393 k->class_id = PCI_CLASS_NETWORK_ETHERNET; 1394 dc->props = virtio_net_properties; 1395 vpciklass->init = virtio_net_pci_init; 1396 } 1397 1398 static void virtio_net_pci_instance_init(Object *obj) 1399 { 1400 VirtIONetPCI *dev = VIRTIO_NET_PCI(obj); 1401 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_NET); 1402 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1403 } 1404 1405 static const TypeInfo virtio_net_pci_info = { 1406 .name = TYPE_VIRTIO_NET_PCI, 1407 .parent = TYPE_VIRTIO_PCI, 1408 .instance_size = sizeof(VirtIONetPCI), 1409 .instance_init = virtio_net_pci_instance_init, 1410 .class_init = virtio_net_pci_class_init, 1411 }; 1412 1413 /* virtio-rng-pci */ 1414 1415 static Property virtio_rng_pci_properties[] = { 1416 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), 1417 DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORngPCI, vdev.conf), 1418 DEFINE_PROP_END_OF_LIST(), 1419 }; 1420 1421 static int virtio_rng_pci_init(VirtIOPCIProxy *vpci_dev) 1422 { 1423 VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev); 1424 DeviceState *vdev = DEVICE(&vrng->vdev); 1425 1426 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1427 if (qdev_init(vdev) < 0) { 1428 return -1; 1429 } 1430 1431 object_property_set_link(OBJECT(vrng), 1432 OBJECT(vrng->vdev.conf.default_backend), "rng", 1433 NULL); 1434 1435 return 0; 1436 } 1437 1438 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data) 1439 { 1440 DeviceClass *dc = DEVICE_CLASS(klass); 1441 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1442 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1443 1444 k->init = virtio_rng_pci_init; 1445 dc->props = virtio_rng_pci_properties; 1446 1447 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1448 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG; 1449 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1450 pcidev_k->class_id = PCI_CLASS_OTHERS; 1451 } 1452 1453 static void virtio_rng_initfn(Object *obj) 1454 { 1455 VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj); 1456 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_RNG); 1457 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 1458 object_property_add_link(obj, "rng", TYPE_RNG_BACKEND, 1459 (Object **)&dev->vdev.conf.rng, NULL); 1460 1461 } 1462 1463 static const TypeInfo virtio_rng_pci_info = { 1464 .name = TYPE_VIRTIO_RNG_PCI, 1465 .parent = TYPE_VIRTIO_PCI, 1466 .instance_size = sizeof(VirtIORngPCI), 1467 .instance_init = virtio_rng_initfn, 1468 .class_init = virtio_rng_pci_class_init, 1469 }; 1470 1471 /* virtio-pci-bus */ 1472 1473 static void virtio_pci_bus_new(VirtioBusState *bus, VirtIOPCIProxy *dev) 1474 { 1475 DeviceState *qdev = DEVICE(dev); 1476 BusState *qbus; 1477 qbus_create_inplace((BusState *)bus, TYPE_VIRTIO_PCI_BUS, qdev, NULL); 1478 qbus = BUS(bus); 1479 qbus->allow_hotplug = 1; 1480 } 1481 1482 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data) 1483 { 1484 BusClass *bus_class = BUS_CLASS(klass); 1485 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 1486 bus_class->max_dev = 1; 1487 k->notify = virtio_pci_notify; 1488 k->save_config = virtio_pci_save_config; 1489 k->load_config = virtio_pci_load_config; 1490 k->save_queue = virtio_pci_save_queue; 1491 k->load_queue = virtio_pci_load_queue; 1492 k->get_features = virtio_pci_get_features; 1493 k->query_guest_notifiers = virtio_pci_query_guest_notifiers; 1494 k->set_host_notifier = virtio_pci_set_host_notifier; 1495 k->set_guest_notifiers = virtio_pci_set_guest_notifiers; 1496 k->vmstate_change = virtio_pci_vmstate_change; 1497 k->device_plugged = virtio_pci_device_plugged; 1498 } 1499 1500 static const TypeInfo virtio_pci_bus_info = { 1501 .name = TYPE_VIRTIO_PCI_BUS, 1502 .parent = TYPE_VIRTIO_BUS, 1503 .instance_size = sizeof(VirtioPCIBusState), 1504 .class_init = virtio_pci_bus_class_init, 1505 }; 1506 1507 static void virtio_pci_register_types(void) 1508 { 1509 type_register_static(&virtio_rng_pci_info); 1510 type_register_static(&virtio_pci_bus_info); 1511 type_register_static(&virtio_pci_info); 1512 #ifdef CONFIG_VIRTFS 1513 type_register_static(&virtio_9p_pci_info); 1514 #endif 1515 type_register_static(&virtio_blk_pci_info); 1516 type_register_static(&virtio_scsi_pci_info); 1517 type_register_static(&virtio_balloon_pci_info); 1518 type_register_static(&virtio_serial_pci_info); 1519 type_register_static(&virtio_net_pci_info); 1520 #ifdef CONFIG_VHOST_SCSI 1521 type_register_static(&vhost_scsi_pci_info); 1522 #endif 1523 } 1524 1525 type_init(virtio_pci_register_types) 1526