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 "qemu/osdep.h" 19 20 #include "standard-headers/linux/virtio_pci.h" 21 #include "hw/virtio/virtio.h" 22 #include "hw/virtio/virtio-blk.h" 23 #include "hw/virtio/virtio-net.h" 24 #include "hw/virtio/virtio-serial.h" 25 #include "hw/virtio/virtio-scsi.h" 26 #include "hw/virtio/virtio-balloon.h" 27 #include "hw/virtio/virtio-input.h" 28 #include "hw/pci/pci.h" 29 #include "qapi/error.h" 30 #include "qemu/error-report.h" 31 #include "hw/pci/msi.h" 32 #include "hw/pci/msix.h" 33 #include "hw/loader.h" 34 #include "sysemu/kvm.h" 35 #include "sysemu/block-backend.h" 36 #include "virtio-pci.h" 37 #include "qemu/range.h" 38 #include "hw/virtio/virtio-bus.h" 39 #include "qapi/visitor.h" 40 41 #define VIRTIO_PCI_REGION_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_present(dev)) 42 43 #undef VIRTIO_PCI_CONFIG 44 45 /* The remaining space is defined by each driver as the per-driver 46 * configuration space */ 47 #define VIRTIO_PCI_CONFIG_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_enabled(dev)) 48 49 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size, 50 VirtIOPCIProxy *dev); 51 static void virtio_pci_reset(DeviceState *qdev); 52 53 /* virtio device */ 54 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */ 55 static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d) 56 { 57 return container_of(d, VirtIOPCIProxy, pci_dev.qdev); 58 } 59 60 /* DeviceState to VirtIOPCIProxy. Note: used on datapath, 61 * be careful and test performance if you change this. 62 */ 63 static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d) 64 { 65 return container_of(d, VirtIOPCIProxy, pci_dev.qdev); 66 } 67 68 static void virtio_pci_notify(DeviceState *d, uint16_t vector) 69 { 70 VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d); 71 72 if (msix_enabled(&proxy->pci_dev)) 73 msix_notify(&proxy->pci_dev, vector); 74 else { 75 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 76 pci_set_irq(&proxy->pci_dev, atomic_read(&vdev->isr) & 1); 77 } 78 } 79 80 static void virtio_pci_save_config(DeviceState *d, QEMUFile *f) 81 { 82 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 83 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 84 85 pci_device_save(&proxy->pci_dev, f); 86 msix_save(&proxy->pci_dev, f); 87 if (msix_present(&proxy->pci_dev)) 88 qemu_put_be16(f, vdev->config_vector); 89 } 90 91 static const VMStateDescription vmstate_virtio_pci_modern_queue_state = { 92 .name = "virtio_pci/modern_queue_state", 93 .version_id = 1, 94 .minimum_version_id = 1, 95 .fields = (VMStateField[]) { 96 VMSTATE_UINT16(num, VirtIOPCIQueue), 97 VMSTATE_UNUSED(1), /* enabled was stored as be16 */ 98 VMSTATE_BOOL(enabled, VirtIOPCIQueue), 99 VMSTATE_UINT32_ARRAY(desc, VirtIOPCIQueue, 2), 100 VMSTATE_UINT32_ARRAY(avail, VirtIOPCIQueue, 2), 101 VMSTATE_UINT32_ARRAY(used, VirtIOPCIQueue, 2), 102 VMSTATE_END_OF_LIST() 103 } 104 }; 105 106 static bool virtio_pci_modern_state_needed(void *opaque) 107 { 108 VirtIOPCIProxy *proxy = opaque; 109 110 return virtio_pci_modern(proxy); 111 } 112 113 static const VMStateDescription vmstate_virtio_pci_modern_state_sub = { 114 .name = "virtio_pci/modern_state", 115 .version_id = 1, 116 .minimum_version_id = 1, 117 .needed = &virtio_pci_modern_state_needed, 118 .fields = (VMStateField[]) { 119 VMSTATE_UINT32(dfselect, VirtIOPCIProxy), 120 VMSTATE_UINT32(gfselect, VirtIOPCIProxy), 121 VMSTATE_UINT32_ARRAY(guest_features, VirtIOPCIProxy, 2), 122 VMSTATE_STRUCT_ARRAY(vqs, VirtIOPCIProxy, VIRTIO_QUEUE_MAX, 0, 123 vmstate_virtio_pci_modern_queue_state, 124 VirtIOPCIQueue), 125 VMSTATE_END_OF_LIST() 126 } 127 }; 128 129 static const VMStateDescription vmstate_virtio_pci = { 130 .name = "virtio_pci", 131 .version_id = 1, 132 .minimum_version_id = 1, 133 .minimum_version_id_old = 1, 134 .fields = (VMStateField[]) { 135 VMSTATE_END_OF_LIST() 136 }, 137 .subsections = (const VMStateDescription*[]) { 138 &vmstate_virtio_pci_modern_state_sub, 139 NULL 140 } 141 }; 142 143 static bool virtio_pci_has_extra_state(DeviceState *d) 144 { 145 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 146 147 return proxy->flags & VIRTIO_PCI_FLAG_MIGRATE_EXTRA; 148 } 149 150 static void virtio_pci_save_extra_state(DeviceState *d, QEMUFile *f) 151 { 152 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 153 154 vmstate_save_state(f, &vmstate_virtio_pci, proxy, NULL); 155 } 156 157 static int virtio_pci_load_extra_state(DeviceState *d, QEMUFile *f) 158 { 159 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 160 161 return vmstate_load_state(f, &vmstate_virtio_pci, proxy, 1); 162 } 163 164 static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f) 165 { 166 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 167 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 168 169 if (msix_present(&proxy->pci_dev)) 170 qemu_put_be16(f, virtio_queue_vector(vdev, n)); 171 } 172 173 static int virtio_pci_load_config(DeviceState *d, QEMUFile *f) 174 { 175 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 176 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 177 178 int ret; 179 ret = pci_device_load(&proxy->pci_dev, f); 180 if (ret) { 181 return ret; 182 } 183 msix_unuse_all_vectors(&proxy->pci_dev); 184 msix_load(&proxy->pci_dev, f); 185 if (msix_present(&proxy->pci_dev)) { 186 qemu_get_be16s(f, &vdev->config_vector); 187 } else { 188 vdev->config_vector = VIRTIO_NO_VECTOR; 189 } 190 if (vdev->config_vector != VIRTIO_NO_VECTOR) { 191 return msix_vector_use(&proxy->pci_dev, vdev->config_vector); 192 } 193 return 0; 194 } 195 196 static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f) 197 { 198 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 199 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 200 201 uint16_t vector; 202 if (msix_present(&proxy->pci_dev)) { 203 qemu_get_be16s(f, &vector); 204 } else { 205 vector = VIRTIO_NO_VECTOR; 206 } 207 virtio_queue_set_vector(vdev, n, vector); 208 if (vector != VIRTIO_NO_VECTOR) { 209 return msix_vector_use(&proxy->pci_dev, vector); 210 } 211 212 return 0; 213 } 214 215 static bool virtio_pci_ioeventfd_enabled(DeviceState *d) 216 { 217 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 218 219 return (proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) != 0; 220 } 221 222 #define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000 223 224 static inline int virtio_pci_queue_mem_mult(struct VirtIOPCIProxy *proxy) 225 { 226 return (proxy->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ) ? 227 QEMU_VIRTIO_PCI_QUEUE_MEM_MULT : 4; 228 } 229 230 static int virtio_pci_ioeventfd_assign(DeviceState *d, EventNotifier *notifier, 231 int n, bool assign) 232 { 233 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 234 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 235 VirtQueue *vq = virtio_get_queue(vdev, n); 236 bool legacy = virtio_pci_legacy(proxy); 237 bool modern = virtio_pci_modern(proxy); 238 bool fast_mmio = kvm_ioeventfd_any_length_enabled(); 239 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY; 240 MemoryRegion *modern_mr = &proxy->notify.mr; 241 MemoryRegion *modern_notify_mr = &proxy->notify_pio.mr; 242 MemoryRegion *legacy_mr = &proxy->bar; 243 hwaddr modern_addr = virtio_pci_queue_mem_mult(proxy) * 244 virtio_get_queue_index(vq); 245 hwaddr legacy_addr = VIRTIO_PCI_QUEUE_NOTIFY; 246 247 if (assign) { 248 if (modern) { 249 if (fast_mmio) { 250 memory_region_add_eventfd(modern_mr, modern_addr, 0, 251 false, n, notifier); 252 } else { 253 memory_region_add_eventfd(modern_mr, modern_addr, 2, 254 false, n, notifier); 255 } 256 if (modern_pio) { 257 memory_region_add_eventfd(modern_notify_mr, 0, 2, 258 true, n, notifier); 259 } 260 } 261 if (legacy) { 262 memory_region_add_eventfd(legacy_mr, legacy_addr, 2, 263 true, n, notifier); 264 } 265 } else { 266 if (modern) { 267 if (fast_mmio) { 268 memory_region_del_eventfd(modern_mr, modern_addr, 0, 269 false, n, notifier); 270 } else { 271 memory_region_del_eventfd(modern_mr, modern_addr, 2, 272 false, n, notifier); 273 } 274 if (modern_pio) { 275 memory_region_del_eventfd(modern_notify_mr, 0, 2, 276 true, n, notifier); 277 } 278 } 279 if (legacy) { 280 memory_region_del_eventfd(legacy_mr, legacy_addr, 2, 281 true, n, notifier); 282 } 283 } 284 return 0; 285 } 286 287 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy) 288 { 289 virtio_bus_start_ioeventfd(&proxy->bus); 290 } 291 292 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy) 293 { 294 virtio_bus_stop_ioeventfd(&proxy->bus); 295 } 296 297 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) 298 { 299 VirtIOPCIProxy *proxy = opaque; 300 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 301 hwaddr pa; 302 303 switch (addr) { 304 case VIRTIO_PCI_GUEST_FEATURES: 305 /* Guest does not negotiate properly? We have to assume nothing. */ 306 if (val & (1 << VIRTIO_F_BAD_FEATURE)) { 307 val = virtio_bus_get_vdev_bad_features(&proxy->bus); 308 } 309 virtio_set_features(vdev, val); 310 break; 311 case VIRTIO_PCI_QUEUE_PFN: 312 pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT; 313 if (pa == 0) { 314 virtio_pci_reset(DEVICE(proxy)); 315 } 316 else 317 virtio_queue_set_addr(vdev, vdev->queue_sel, pa); 318 break; 319 case VIRTIO_PCI_QUEUE_SEL: 320 if (val < VIRTIO_QUEUE_MAX) 321 vdev->queue_sel = val; 322 break; 323 case VIRTIO_PCI_QUEUE_NOTIFY: 324 if (val < VIRTIO_QUEUE_MAX) { 325 virtio_queue_notify(vdev, val); 326 } 327 break; 328 case VIRTIO_PCI_STATUS: 329 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) { 330 virtio_pci_stop_ioeventfd(proxy); 331 } 332 333 virtio_set_status(vdev, val & 0xFF); 334 335 if (val & VIRTIO_CONFIG_S_DRIVER_OK) { 336 virtio_pci_start_ioeventfd(proxy); 337 } 338 339 if (vdev->status == 0) { 340 virtio_pci_reset(DEVICE(proxy)); 341 } 342 343 /* Linux before 2.6.34 drives the device without enabling 344 the PCI device bus master bit. Enable it automatically 345 for the guest. This is a PCI spec violation but so is 346 initiating DMA with bus master bit clear. */ 347 if (val == (VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER)) { 348 pci_default_write_config(&proxy->pci_dev, PCI_COMMAND, 349 proxy->pci_dev.config[PCI_COMMAND] | 350 PCI_COMMAND_MASTER, 1); 351 } 352 break; 353 case VIRTIO_MSI_CONFIG_VECTOR: 354 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); 355 /* Make it possible for guest to discover an error took place. */ 356 if (msix_vector_use(&proxy->pci_dev, val) < 0) 357 val = VIRTIO_NO_VECTOR; 358 vdev->config_vector = val; 359 break; 360 case VIRTIO_MSI_QUEUE_VECTOR: 361 msix_vector_unuse(&proxy->pci_dev, 362 virtio_queue_vector(vdev, vdev->queue_sel)); 363 /* Make it possible for guest to discover an error took place. */ 364 if (msix_vector_use(&proxy->pci_dev, val) < 0) 365 val = VIRTIO_NO_VECTOR; 366 virtio_queue_set_vector(vdev, vdev->queue_sel, val); 367 break; 368 default: 369 error_report("%s: unexpected address 0x%x value 0x%x", 370 __func__, addr, val); 371 break; 372 } 373 } 374 375 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr) 376 { 377 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 378 uint32_t ret = 0xFFFFFFFF; 379 380 switch (addr) { 381 case VIRTIO_PCI_HOST_FEATURES: 382 ret = vdev->host_features; 383 break; 384 case VIRTIO_PCI_GUEST_FEATURES: 385 ret = vdev->guest_features; 386 break; 387 case VIRTIO_PCI_QUEUE_PFN: 388 ret = virtio_queue_get_addr(vdev, vdev->queue_sel) 389 >> VIRTIO_PCI_QUEUE_ADDR_SHIFT; 390 break; 391 case VIRTIO_PCI_QUEUE_NUM: 392 ret = virtio_queue_get_num(vdev, vdev->queue_sel); 393 break; 394 case VIRTIO_PCI_QUEUE_SEL: 395 ret = vdev->queue_sel; 396 break; 397 case VIRTIO_PCI_STATUS: 398 ret = vdev->status; 399 break; 400 case VIRTIO_PCI_ISR: 401 /* reading from the ISR also clears it. */ 402 ret = atomic_xchg(&vdev->isr, 0); 403 pci_irq_deassert(&proxy->pci_dev); 404 break; 405 case VIRTIO_MSI_CONFIG_VECTOR: 406 ret = vdev->config_vector; 407 break; 408 case VIRTIO_MSI_QUEUE_VECTOR: 409 ret = virtio_queue_vector(vdev, vdev->queue_sel); 410 break; 411 default: 412 break; 413 } 414 415 return ret; 416 } 417 418 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr, 419 unsigned size) 420 { 421 VirtIOPCIProxy *proxy = opaque; 422 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 423 uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev); 424 uint64_t val = 0; 425 if (addr < config) { 426 return virtio_ioport_read(proxy, addr); 427 } 428 addr -= config; 429 430 switch (size) { 431 case 1: 432 val = virtio_config_readb(vdev, addr); 433 break; 434 case 2: 435 val = virtio_config_readw(vdev, addr); 436 if (virtio_is_big_endian(vdev)) { 437 val = bswap16(val); 438 } 439 break; 440 case 4: 441 val = virtio_config_readl(vdev, addr); 442 if (virtio_is_big_endian(vdev)) { 443 val = bswap32(val); 444 } 445 break; 446 } 447 return val; 448 } 449 450 static void virtio_pci_config_write(void *opaque, hwaddr addr, 451 uint64_t val, unsigned size) 452 { 453 VirtIOPCIProxy *proxy = opaque; 454 uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev); 455 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 456 if (addr < config) { 457 virtio_ioport_write(proxy, addr, val); 458 return; 459 } 460 addr -= config; 461 /* 462 * Virtio-PCI is odd. Ioports are LE but config space is target native 463 * endian. 464 */ 465 switch (size) { 466 case 1: 467 virtio_config_writeb(vdev, addr, val); 468 break; 469 case 2: 470 if (virtio_is_big_endian(vdev)) { 471 val = bswap16(val); 472 } 473 virtio_config_writew(vdev, addr, val); 474 break; 475 case 4: 476 if (virtio_is_big_endian(vdev)) { 477 val = bswap32(val); 478 } 479 virtio_config_writel(vdev, addr, val); 480 break; 481 } 482 } 483 484 static const MemoryRegionOps virtio_pci_config_ops = { 485 .read = virtio_pci_config_read, 486 .write = virtio_pci_config_write, 487 .impl = { 488 .min_access_size = 1, 489 .max_access_size = 4, 490 }, 491 .endianness = DEVICE_LITTLE_ENDIAN, 492 }; 493 494 static MemoryRegion *virtio_address_space_lookup(VirtIOPCIProxy *proxy, 495 hwaddr *off, int len) 496 { 497 int i; 498 VirtIOPCIRegion *reg; 499 500 for (i = 0; i < ARRAY_SIZE(proxy->regs); ++i) { 501 reg = &proxy->regs[i]; 502 if (*off >= reg->offset && 503 *off + len <= reg->offset + reg->size) { 504 *off -= reg->offset; 505 return ®->mr; 506 } 507 } 508 509 return NULL; 510 } 511 512 /* Below are generic functions to do memcpy from/to an address space, 513 * without byteswaps, with input validation. 514 * 515 * As regular address_space_* APIs all do some kind of byteswap at least for 516 * some host/target combinations, we are forced to explicitly convert to a 517 * known-endianness integer value. 518 * It doesn't really matter which endian format to go through, so the code 519 * below selects the endian that causes the least amount of work on the given 520 * host. 521 * 522 * Note: host pointer must be aligned. 523 */ 524 static 525 void virtio_address_space_write(VirtIOPCIProxy *proxy, hwaddr addr, 526 const uint8_t *buf, int len) 527 { 528 uint64_t val; 529 MemoryRegion *mr; 530 531 /* address_space_* APIs assume an aligned address. 532 * As address is under guest control, handle illegal values. 533 */ 534 addr &= ~(len - 1); 535 536 mr = virtio_address_space_lookup(proxy, &addr, len); 537 if (!mr) { 538 return; 539 } 540 541 /* Make sure caller aligned buf properly */ 542 assert(!(((uintptr_t)buf) & (len - 1))); 543 544 switch (len) { 545 case 1: 546 val = pci_get_byte(buf); 547 break; 548 case 2: 549 val = cpu_to_le16(pci_get_word(buf)); 550 break; 551 case 4: 552 val = cpu_to_le32(pci_get_long(buf)); 553 break; 554 default: 555 /* As length is under guest control, handle illegal values. */ 556 return; 557 } 558 memory_region_dispatch_write(mr, addr, val, len, MEMTXATTRS_UNSPECIFIED); 559 } 560 561 static void 562 virtio_address_space_read(VirtIOPCIProxy *proxy, hwaddr addr, 563 uint8_t *buf, int len) 564 { 565 uint64_t val; 566 MemoryRegion *mr; 567 568 /* address_space_* APIs assume an aligned address. 569 * As address is under guest control, handle illegal values. 570 */ 571 addr &= ~(len - 1); 572 573 mr = virtio_address_space_lookup(proxy, &addr, len); 574 if (!mr) { 575 return; 576 } 577 578 /* Make sure caller aligned buf properly */ 579 assert(!(((uintptr_t)buf) & (len - 1))); 580 581 memory_region_dispatch_read(mr, addr, &val, len, MEMTXATTRS_UNSPECIFIED); 582 switch (len) { 583 case 1: 584 pci_set_byte(buf, val); 585 break; 586 case 2: 587 pci_set_word(buf, le16_to_cpu(val)); 588 break; 589 case 4: 590 pci_set_long(buf, le32_to_cpu(val)); 591 break; 592 default: 593 /* As length is under guest control, handle illegal values. */ 594 break; 595 } 596 } 597 598 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, 599 uint32_t val, int len) 600 { 601 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); 602 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 603 struct virtio_pci_cfg_cap *cfg; 604 605 pci_default_write_config(pci_dev, address, val, len); 606 607 if (range_covers_byte(address, len, PCI_COMMAND) && 608 !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { 609 virtio_pci_stop_ioeventfd(proxy); 610 virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); 611 } 612 613 if (proxy->config_cap && 614 ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap, 615 pci_cfg_data), 616 sizeof cfg->pci_cfg_data)) { 617 uint32_t off; 618 uint32_t len; 619 620 cfg = (void *)(proxy->pci_dev.config + proxy->config_cap); 621 off = le32_to_cpu(cfg->cap.offset); 622 len = le32_to_cpu(cfg->cap.length); 623 624 if (len == 1 || len == 2 || len == 4) { 625 assert(len <= sizeof cfg->pci_cfg_data); 626 virtio_address_space_write(proxy, off, cfg->pci_cfg_data, len); 627 } 628 } 629 } 630 631 static uint32_t virtio_read_config(PCIDevice *pci_dev, 632 uint32_t address, int len) 633 { 634 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); 635 struct virtio_pci_cfg_cap *cfg; 636 637 if (proxy->config_cap && 638 ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap, 639 pci_cfg_data), 640 sizeof cfg->pci_cfg_data)) { 641 uint32_t off; 642 uint32_t len; 643 644 cfg = (void *)(proxy->pci_dev.config + proxy->config_cap); 645 off = le32_to_cpu(cfg->cap.offset); 646 len = le32_to_cpu(cfg->cap.length); 647 648 if (len == 1 || len == 2 || len == 4) { 649 assert(len <= sizeof cfg->pci_cfg_data); 650 virtio_address_space_read(proxy, off, cfg->pci_cfg_data, len); 651 } 652 } 653 654 return pci_default_read_config(pci_dev, address, len); 655 } 656 657 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, 658 unsigned int queue_no, 659 unsigned int vector) 660 { 661 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 662 int ret; 663 664 if (irqfd->users == 0) { 665 ret = kvm_irqchip_add_msi_route(kvm_state, vector, &proxy->pci_dev); 666 if (ret < 0) { 667 return ret; 668 } 669 irqfd->virq = ret; 670 } 671 irqfd->users++; 672 return 0; 673 } 674 675 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, 676 unsigned int vector) 677 { 678 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 679 if (--irqfd->users == 0) { 680 kvm_irqchip_release_virq(kvm_state, irqfd->virq); 681 } 682 } 683 684 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy, 685 unsigned int queue_no, 686 unsigned int vector) 687 { 688 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 689 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 690 VirtQueue *vq = virtio_get_queue(vdev, queue_no); 691 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 692 return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, NULL, irqfd->virq); 693 } 694 695 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy, 696 unsigned int queue_no, 697 unsigned int vector) 698 { 699 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 700 VirtQueue *vq = virtio_get_queue(vdev, queue_no); 701 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 702 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 703 int ret; 704 705 ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, n, irqfd->virq); 706 assert(ret == 0); 707 } 708 709 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs) 710 { 711 PCIDevice *dev = &proxy->pci_dev; 712 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 713 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 714 unsigned int vector; 715 int ret, queue_no; 716 717 for (queue_no = 0; queue_no < nvqs; queue_no++) { 718 if (!virtio_queue_get_num(vdev, queue_no)) { 719 break; 720 } 721 vector = virtio_queue_vector(vdev, queue_no); 722 if (vector >= msix_nr_vectors_allocated(dev)) { 723 continue; 724 } 725 ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector); 726 if (ret < 0) { 727 goto undo; 728 } 729 /* If guest supports masking, set up irqfd now. 730 * Otherwise, delay until unmasked in the frontend. 731 */ 732 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { 733 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); 734 if (ret < 0) { 735 kvm_virtio_pci_vq_vector_release(proxy, vector); 736 goto undo; 737 } 738 } 739 } 740 return 0; 741 742 undo: 743 while (--queue_no >= 0) { 744 vector = virtio_queue_vector(vdev, queue_no); 745 if (vector >= msix_nr_vectors_allocated(dev)) { 746 continue; 747 } 748 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { 749 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 750 } 751 kvm_virtio_pci_vq_vector_release(proxy, vector); 752 } 753 return ret; 754 } 755 756 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs) 757 { 758 PCIDevice *dev = &proxy->pci_dev; 759 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 760 unsigned int vector; 761 int queue_no; 762 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 763 764 for (queue_no = 0; queue_no < nvqs; queue_no++) { 765 if (!virtio_queue_get_num(vdev, queue_no)) { 766 break; 767 } 768 vector = virtio_queue_vector(vdev, queue_no); 769 if (vector >= msix_nr_vectors_allocated(dev)) { 770 continue; 771 } 772 /* If guest supports masking, clean up irqfd now. 773 * Otherwise, it was cleaned when masked in the frontend. 774 */ 775 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { 776 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 777 } 778 kvm_virtio_pci_vq_vector_release(proxy, vector); 779 } 780 } 781 782 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy, 783 unsigned int queue_no, 784 unsigned int vector, 785 MSIMessage msg) 786 { 787 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 788 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 789 VirtQueue *vq = virtio_get_queue(vdev, queue_no); 790 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 791 VirtIOIRQFD *irqfd; 792 int ret = 0; 793 794 if (proxy->vector_irqfd) { 795 irqfd = &proxy->vector_irqfd[vector]; 796 if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) { 797 ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg, 798 &proxy->pci_dev); 799 if (ret < 0) { 800 return ret; 801 } 802 kvm_irqchip_commit_routes(kvm_state); 803 } 804 } 805 806 /* If guest supports masking, irqfd is already setup, unmask it. 807 * Otherwise, set it up now. 808 */ 809 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { 810 k->guest_notifier_mask(vdev, queue_no, false); 811 /* Test after unmasking to avoid losing events. */ 812 if (k->guest_notifier_pending && 813 k->guest_notifier_pending(vdev, queue_no)) { 814 event_notifier_set(n); 815 } 816 } else { 817 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); 818 } 819 return ret; 820 } 821 822 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy, 823 unsigned int queue_no, 824 unsigned int vector) 825 { 826 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 827 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 828 829 /* If guest supports masking, keep irqfd but mask it. 830 * Otherwise, clean it up now. 831 */ 832 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { 833 k->guest_notifier_mask(vdev, queue_no, true); 834 } else { 835 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 836 } 837 } 838 839 static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector, 840 MSIMessage msg) 841 { 842 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 843 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 844 VirtQueue *vq = virtio_vector_first_queue(vdev, vector); 845 int ret, index, unmasked = 0; 846 847 while (vq) { 848 index = virtio_get_queue_index(vq); 849 if (!virtio_queue_get_num(vdev, index)) { 850 break; 851 } 852 if (index < proxy->nvqs_with_notifiers) { 853 ret = virtio_pci_vq_vector_unmask(proxy, index, vector, msg); 854 if (ret < 0) { 855 goto undo; 856 } 857 ++unmasked; 858 } 859 vq = virtio_vector_next_queue(vq); 860 } 861 862 return 0; 863 864 undo: 865 vq = virtio_vector_first_queue(vdev, vector); 866 while (vq && unmasked >= 0) { 867 index = virtio_get_queue_index(vq); 868 if (index < proxy->nvqs_with_notifiers) { 869 virtio_pci_vq_vector_mask(proxy, index, vector); 870 --unmasked; 871 } 872 vq = virtio_vector_next_queue(vq); 873 } 874 return ret; 875 } 876 877 static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector) 878 { 879 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 880 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 881 VirtQueue *vq = virtio_vector_first_queue(vdev, vector); 882 int index; 883 884 while (vq) { 885 index = virtio_get_queue_index(vq); 886 if (!virtio_queue_get_num(vdev, index)) { 887 break; 888 } 889 if (index < proxy->nvqs_with_notifiers) { 890 virtio_pci_vq_vector_mask(proxy, index, vector); 891 } 892 vq = virtio_vector_next_queue(vq); 893 } 894 } 895 896 static void virtio_pci_vector_poll(PCIDevice *dev, 897 unsigned int vector_start, 898 unsigned int vector_end) 899 { 900 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 901 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 902 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 903 int queue_no; 904 unsigned int vector; 905 EventNotifier *notifier; 906 VirtQueue *vq; 907 908 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { 909 if (!virtio_queue_get_num(vdev, queue_no)) { 910 break; 911 } 912 vector = virtio_queue_vector(vdev, queue_no); 913 if (vector < vector_start || vector >= vector_end || 914 !msix_is_masked(dev, vector)) { 915 continue; 916 } 917 vq = virtio_get_queue(vdev, queue_no); 918 notifier = virtio_queue_get_guest_notifier(vq); 919 if (k->guest_notifier_pending) { 920 if (k->guest_notifier_pending(vdev, queue_no)) { 921 msix_set_pending(dev, vector); 922 } 923 } else if (event_notifier_test_and_clear(notifier)) { 924 msix_set_pending(dev, vector); 925 } 926 } 927 } 928 929 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign, 930 bool with_irqfd) 931 { 932 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 933 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 934 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev); 935 VirtQueue *vq = virtio_get_queue(vdev, n); 936 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 937 938 if (assign) { 939 int r = event_notifier_init(notifier, 0); 940 if (r < 0) { 941 return r; 942 } 943 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); 944 } else { 945 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); 946 event_notifier_cleanup(notifier); 947 } 948 949 if (!msix_enabled(&proxy->pci_dev) && 950 vdev->use_guest_notifier_mask && 951 vdc->guest_notifier_mask) { 952 vdc->guest_notifier_mask(vdev, n, !assign); 953 } 954 955 return 0; 956 } 957 958 static bool virtio_pci_query_guest_notifiers(DeviceState *d) 959 { 960 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 961 return msix_enabled(&proxy->pci_dev); 962 } 963 964 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign) 965 { 966 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 967 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 968 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 969 int r, n; 970 bool with_irqfd = msix_enabled(&proxy->pci_dev) && 971 kvm_msi_via_irqfd_enabled(); 972 973 nvqs = MIN(nvqs, VIRTIO_QUEUE_MAX); 974 975 /* When deassigning, pass a consistent nvqs value 976 * to avoid leaking notifiers. 977 */ 978 assert(assign || nvqs == proxy->nvqs_with_notifiers); 979 980 proxy->nvqs_with_notifiers = nvqs; 981 982 /* Must unset vector notifier while guest notifier is still assigned */ 983 if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) { 984 msix_unset_vector_notifiers(&proxy->pci_dev); 985 if (proxy->vector_irqfd) { 986 kvm_virtio_pci_vector_release(proxy, nvqs); 987 g_free(proxy->vector_irqfd); 988 proxy->vector_irqfd = NULL; 989 } 990 } 991 992 for (n = 0; n < nvqs; n++) { 993 if (!virtio_queue_get_num(vdev, n)) { 994 break; 995 } 996 997 r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd); 998 if (r < 0) { 999 goto assign_error; 1000 } 1001 } 1002 1003 /* Must set vector notifier after guest notifier has been assigned */ 1004 if ((with_irqfd || k->guest_notifier_mask) && assign) { 1005 if (with_irqfd) { 1006 proxy->vector_irqfd = 1007 g_malloc0(sizeof(*proxy->vector_irqfd) * 1008 msix_nr_vectors_allocated(&proxy->pci_dev)); 1009 r = kvm_virtio_pci_vector_use(proxy, nvqs); 1010 if (r < 0) { 1011 goto assign_error; 1012 } 1013 } 1014 r = msix_set_vector_notifiers(&proxy->pci_dev, 1015 virtio_pci_vector_unmask, 1016 virtio_pci_vector_mask, 1017 virtio_pci_vector_poll); 1018 if (r < 0) { 1019 goto notifiers_error; 1020 } 1021 } 1022 1023 return 0; 1024 1025 notifiers_error: 1026 if (with_irqfd) { 1027 assert(assign); 1028 kvm_virtio_pci_vector_release(proxy, nvqs); 1029 } 1030 1031 assign_error: 1032 /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */ 1033 assert(assign); 1034 while (--n >= 0) { 1035 virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd); 1036 } 1037 return r; 1038 } 1039 1040 static void virtio_pci_vmstate_change(DeviceState *d, bool running) 1041 { 1042 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 1043 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 1044 1045 if (running) { 1046 /* Old QEMU versions did not set bus master enable on status write. 1047 * Detect DRIVER set and enable it. 1048 */ 1049 if ((proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION) && 1050 (vdev->status & VIRTIO_CONFIG_S_DRIVER) && 1051 !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { 1052 pci_default_write_config(&proxy->pci_dev, PCI_COMMAND, 1053 proxy->pci_dev.config[PCI_COMMAND] | 1054 PCI_COMMAND_MASTER, 1); 1055 } 1056 virtio_pci_start_ioeventfd(proxy); 1057 } else { 1058 virtio_pci_stop_ioeventfd(proxy); 1059 } 1060 } 1061 1062 #ifdef CONFIG_VIRTFS 1063 static void virtio_9p_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 1064 { 1065 V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev); 1066 DeviceState *vdev = DEVICE(&dev->vdev); 1067 1068 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1069 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 1070 } 1071 1072 static Property virtio_9p_pci_properties[] = { 1073 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1074 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1075 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 1076 DEFINE_PROP_END_OF_LIST(), 1077 }; 1078 1079 static void virtio_9p_pci_class_init(ObjectClass *klass, void *data) 1080 { 1081 DeviceClass *dc = DEVICE_CLASS(klass); 1082 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1083 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1084 1085 k->realize = virtio_9p_pci_realize; 1086 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1087 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P; 1088 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1089 pcidev_k->class_id = 0x2; 1090 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1091 dc->props = virtio_9p_pci_properties; 1092 } 1093 1094 static void virtio_9p_pci_instance_init(Object *obj) 1095 { 1096 V9fsPCIState *dev = VIRTIO_9P_PCI(obj); 1097 1098 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 1099 TYPE_VIRTIO_9P); 1100 } 1101 1102 static const TypeInfo virtio_9p_pci_info = { 1103 .name = TYPE_VIRTIO_9P_PCI, 1104 .parent = TYPE_VIRTIO_PCI, 1105 .instance_size = sizeof(V9fsPCIState), 1106 .instance_init = virtio_9p_pci_instance_init, 1107 .class_init = virtio_9p_pci_class_init, 1108 }; 1109 #endif /* CONFIG_VIRTFS */ 1110 1111 /* 1112 * virtio-pci: This is the PCIDevice which has a virtio-pci-bus. 1113 */ 1114 1115 static int virtio_pci_query_nvectors(DeviceState *d) 1116 { 1117 VirtIOPCIProxy *proxy = VIRTIO_PCI(d); 1118 1119 return proxy->nvectors; 1120 } 1121 1122 static AddressSpace *virtio_pci_get_dma_as(DeviceState *d) 1123 { 1124 VirtIOPCIProxy *proxy = VIRTIO_PCI(d); 1125 PCIDevice *dev = &proxy->pci_dev; 1126 1127 return pci_get_address_space(dev); 1128 } 1129 1130 static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy, 1131 struct virtio_pci_cap *cap) 1132 { 1133 PCIDevice *dev = &proxy->pci_dev; 1134 int offset; 1135 1136 offset = pci_add_capability(dev, PCI_CAP_ID_VNDR, 0, 1137 cap->cap_len, &error_abort); 1138 1139 assert(cap->cap_len >= sizeof *cap); 1140 memcpy(dev->config + offset + PCI_CAP_FLAGS, &cap->cap_len, 1141 cap->cap_len - PCI_CAP_FLAGS); 1142 1143 return offset; 1144 } 1145 1146 static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr, 1147 unsigned size) 1148 { 1149 VirtIOPCIProxy *proxy = opaque; 1150 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 1151 uint32_t val = 0; 1152 int i; 1153 1154 switch (addr) { 1155 case VIRTIO_PCI_COMMON_DFSELECT: 1156 val = proxy->dfselect; 1157 break; 1158 case VIRTIO_PCI_COMMON_DF: 1159 if (proxy->dfselect <= 1) { 1160 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev); 1161 1162 val = (vdev->host_features & ~vdc->legacy_features) >> 1163 (32 * proxy->dfselect); 1164 } 1165 break; 1166 case VIRTIO_PCI_COMMON_GFSELECT: 1167 val = proxy->gfselect; 1168 break; 1169 case VIRTIO_PCI_COMMON_GF: 1170 if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) { 1171 val = proxy->guest_features[proxy->gfselect]; 1172 } 1173 break; 1174 case VIRTIO_PCI_COMMON_MSIX: 1175 val = vdev->config_vector; 1176 break; 1177 case VIRTIO_PCI_COMMON_NUMQ: 1178 for (i = 0; i < VIRTIO_QUEUE_MAX; ++i) { 1179 if (virtio_queue_get_num(vdev, i)) { 1180 val = i + 1; 1181 } 1182 } 1183 break; 1184 case VIRTIO_PCI_COMMON_STATUS: 1185 val = vdev->status; 1186 break; 1187 case VIRTIO_PCI_COMMON_CFGGENERATION: 1188 val = vdev->generation; 1189 break; 1190 case VIRTIO_PCI_COMMON_Q_SELECT: 1191 val = vdev->queue_sel; 1192 break; 1193 case VIRTIO_PCI_COMMON_Q_SIZE: 1194 val = virtio_queue_get_num(vdev, vdev->queue_sel); 1195 break; 1196 case VIRTIO_PCI_COMMON_Q_MSIX: 1197 val = virtio_queue_vector(vdev, vdev->queue_sel); 1198 break; 1199 case VIRTIO_PCI_COMMON_Q_ENABLE: 1200 val = proxy->vqs[vdev->queue_sel].enabled; 1201 break; 1202 case VIRTIO_PCI_COMMON_Q_NOFF: 1203 /* Simply map queues in order */ 1204 val = vdev->queue_sel; 1205 break; 1206 case VIRTIO_PCI_COMMON_Q_DESCLO: 1207 val = proxy->vqs[vdev->queue_sel].desc[0]; 1208 break; 1209 case VIRTIO_PCI_COMMON_Q_DESCHI: 1210 val = proxy->vqs[vdev->queue_sel].desc[1]; 1211 break; 1212 case VIRTIO_PCI_COMMON_Q_AVAILLO: 1213 val = proxy->vqs[vdev->queue_sel].avail[0]; 1214 break; 1215 case VIRTIO_PCI_COMMON_Q_AVAILHI: 1216 val = proxy->vqs[vdev->queue_sel].avail[1]; 1217 break; 1218 case VIRTIO_PCI_COMMON_Q_USEDLO: 1219 val = proxy->vqs[vdev->queue_sel].used[0]; 1220 break; 1221 case VIRTIO_PCI_COMMON_Q_USEDHI: 1222 val = proxy->vqs[vdev->queue_sel].used[1]; 1223 break; 1224 default: 1225 val = 0; 1226 } 1227 1228 return val; 1229 } 1230 1231 static void virtio_pci_common_write(void *opaque, hwaddr addr, 1232 uint64_t val, unsigned size) 1233 { 1234 VirtIOPCIProxy *proxy = opaque; 1235 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 1236 1237 switch (addr) { 1238 case VIRTIO_PCI_COMMON_DFSELECT: 1239 proxy->dfselect = val; 1240 break; 1241 case VIRTIO_PCI_COMMON_GFSELECT: 1242 proxy->gfselect = val; 1243 break; 1244 case VIRTIO_PCI_COMMON_GF: 1245 if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) { 1246 proxy->guest_features[proxy->gfselect] = val; 1247 virtio_set_features(vdev, 1248 (((uint64_t)proxy->guest_features[1]) << 32) | 1249 proxy->guest_features[0]); 1250 } 1251 break; 1252 case VIRTIO_PCI_COMMON_MSIX: 1253 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); 1254 /* Make it possible for guest to discover an error took place. */ 1255 if (msix_vector_use(&proxy->pci_dev, val) < 0) { 1256 val = VIRTIO_NO_VECTOR; 1257 } 1258 vdev->config_vector = val; 1259 break; 1260 case VIRTIO_PCI_COMMON_STATUS: 1261 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) { 1262 virtio_pci_stop_ioeventfd(proxy); 1263 } 1264 1265 virtio_set_status(vdev, val & 0xFF); 1266 1267 if (val & VIRTIO_CONFIG_S_DRIVER_OK) { 1268 virtio_pci_start_ioeventfd(proxy); 1269 } 1270 1271 if (vdev->status == 0) { 1272 virtio_pci_reset(DEVICE(proxy)); 1273 } 1274 1275 break; 1276 case VIRTIO_PCI_COMMON_Q_SELECT: 1277 if (val < VIRTIO_QUEUE_MAX) { 1278 vdev->queue_sel = val; 1279 } 1280 break; 1281 case VIRTIO_PCI_COMMON_Q_SIZE: 1282 proxy->vqs[vdev->queue_sel].num = val; 1283 break; 1284 case VIRTIO_PCI_COMMON_Q_MSIX: 1285 msix_vector_unuse(&proxy->pci_dev, 1286 virtio_queue_vector(vdev, vdev->queue_sel)); 1287 /* Make it possible for guest to discover an error took place. */ 1288 if (msix_vector_use(&proxy->pci_dev, val) < 0) { 1289 val = VIRTIO_NO_VECTOR; 1290 } 1291 virtio_queue_set_vector(vdev, vdev->queue_sel, val); 1292 break; 1293 case VIRTIO_PCI_COMMON_Q_ENABLE: 1294 virtio_queue_set_num(vdev, vdev->queue_sel, 1295 proxy->vqs[vdev->queue_sel].num); 1296 virtio_queue_set_rings(vdev, vdev->queue_sel, 1297 ((uint64_t)proxy->vqs[vdev->queue_sel].desc[1]) << 32 | 1298 proxy->vqs[vdev->queue_sel].desc[0], 1299 ((uint64_t)proxy->vqs[vdev->queue_sel].avail[1]) << 32 | 1300 proxy->vqs[vdev->queue_sel].avail[0], 1301 ((uint64_t)proxy->vqs[vdev->queue_sel].used[1]) << 32 | 1302 proxy->vqs[vdev->queue_sel].used[0]); 1303 proxy->vqs[vdev->queue_sel].enabled = 1; 1304 break; 1305 case VIRTIO_PCI_COMMON_Q_DESCLO: 1306 proxy->vqs[vdev->queue_sel].desc[0] = val; 1307 break; 1308 case VIRTIO_PCI_COMMON_Q_DESCHI: 1309 proxy->vqs[vdev->queue_sel].desc[1] = val; 1310 break; 1311 case VIRTIO_PCI_COMMON_Q_AVAILLO: 1312 proxy->vqs[vdev->queue_sel].avail[0] = val; 1313 break; 1314 case VIRTIO_PCI_COMMON_Q_AVAILHI: 1315 proxy->vqs[vdev->queue_sel].avail[1] = val; 1316 break; 1317 case VIRTIO_PCI_COMMON_Q_USEDLO: 1318 proxy->vqs[vdev->queue_sel].used[0] = val; 1319 break; 1320 case VIRTIO_PCI_COMMON_Q_USEDHI: 1321 proxy->vqs[vdev->queue_sel].used[1] = val; 1322 break; 1323 default: 1324 break; 1325 } 1326 } 1327 1328 1329 static uint64_t virtio_pci_notify_read(void *opaque, hwaddr addr, 1330 unsigned size) 1331 { 1332 return 0; 1333 } 1334 1335 static void virtio_pci_notify_write(void *opaque, hwaddr addr, 1336 uint64_t val, unsigned size) 1337 { 1338 VirtIODevice *vdev = opaque; 1339 VirtIOPCIProxy *proxy = VIRTIO_PCI(DEVICE(vdev)->parent_bus->parent); 1340 unsigned queue = addr / virtio_pci_queue_mem_mult(proxy); 1341 1342 if (queue < VIRTIO_QUEUE_MAX) { 1343 virtio_queue_notify(vdev, queue); 1344 } 1345 } 1346 1347 static void virtio_pci_notify_write_pio(void *opaque, hwaddr addr, 1348 uint64_t val, unsigned size) 1349 { 1350 VirtIODevice *vdev = opaque; 1351 unsigned queue = val; 1352 1353 if (queue < VIRTIO_QUEUE_MAX) { 1354 virtio_queue_notify(vdev, queue); 1355 } 1356 } 1357 1358 static uint64_t virtio_pci_isr_read(void *opaque, hwaddr addr, 1359 unsigned size) 1360 { 1361 VirtIOPCIProxy *proxy = opaque; 1362 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 1363 uint64_t val = atomic_xchg(&vdev->isr, 0); 1364 pci_irq_deassert(&proxy->pci_dev); 1365 1366 return val; 1367 } 1368 1369 static void virtio_pci_isr_write(void *opaque, hwaddr addr, 1370 uint64_t val, unsigned size) 1371 { 1372 } 1373 1374 static uint64_t virtio_pci_device_read(void *opaque, hwaddr addr, 1375 unsigned size) 1376 { 1377 VirtIODevice *vdev = opaque; 1378 uint64_t val = 0; 1379 1380 switch (size) { 1381 case 1: 1382 val = virtio_config_modern_readb(vdev, addr); 1383 break; 1384 case 2: 1385 val = virtio_config_modern_readw(vdev, addr); 1386 break; 1387 case 4: 1388 val = virtio_config_modern_readl(vdev, addr); 1389 break; 1390 } 1391 return val; 1392 } 1393 1394 static void virtio_pci_device_write(void *opaque, hwaddr addr, 1395 uint64_t val, unsigned size) 1396 { 1397 VirtIODevice *vdev = opaque; 1398 switch (size) { 1399 case 1: 1400 virtio_config_modern_writeb(vdev, addr, val); 1401 break; 1402 case 2: 1403 virtio_config_modern_writew(vdev, addr, val); 1404 break; 1405 case 4: 1406 virtio_config_modern_writel(vdev, addr, val); 1407 break; 1408 } 1409 } 1410 1411 static void virtio_pci_modern_regions_init(VirtIOPCIProxy *proxy) 1412 { 1413 static const MemoryRegionOps common_ops = { 1414 .read = virtio_pci_common_read, 1415 .write = virtio_pci_common_write, 1416 .impl = { 1417 .min_access_size = 1, 1418 .max_access_size = 4, 1419 }, 1420 .endianness = DEVICE_LITTLE_ENDIAN, 1421 }; 1422 static const MemoryRegionOps isr_ops = { 1423 .read = virtio_pci_isr_read, 1424 .write = virtio_pci_isr_write, 1425 .impl = { 1426 .min_access_size = 1, 1427 .max_access_size = 4, 1428 }, 1429 .endianness = DEVICE_LITTLE_ENDIAN, 1430 }; 1431 static const MemoryRegionOps device_ops = { 1432 .read = virtio_pci_device_read, 1433 .write = virtio_pci_device_write, 1434 .impl = { 1435 .min_access_size = 1, 1436 .max_access_size = 4, 1437 }, 1438 .endianness = DEVICE_LITTLE_ENDIAN, 1439 }; 1440 static const MemoryRegionOps notify_ops = { 1441 .read = virtio_pci_notify_read, 1442 .write = virtio_pci_notify_write, 1443 .impl = { 1444 .min_access_size = 1, 1445 .max_access_size = 4, 1446 }, 1447 .endianness = DEVICE_LITTLE_ENDIAN, 1448 }; 1449 static const MemoryRegionOps notify_pio_ops = { 1450 .read = virtio_pci_notify_read, 1451 .write = virtio_pci_notify_write_pio, 1452 .impl = { 1453 .min_access_size = 1, 1454 .max_access_size = 4, 1455 }, 1456 .endianness = DEVICE_LITTLE_ENDIAN, 1457 }; 1458 1459 1460 memory_region_init_io(&proxy->common.mr, OBJECT(proxy), 1461 &common_ops, 1462 proxy, 1463 "virtio-pci-common", 1464 proxy->common.size); 1465 1466 memory_region_init_io(&proxy->isr.mr, OBJECT(proxy), 1467 &isr_ops, 1468 proxy, 1469 "virtio-pci-isr", 1470 proxy->isr.size); 1471 1472 memory_region_init_io(&proxy->device.mr, OBJECT(proxy), 1473 &device_ops, 1474 virtio_bus_get_device(&proxy->bus), 1475 "virtio-pci-device", 1476 proxy->device.size); 1477 1478 memory_region_init_io(&proxy->notify.mr, OBJECT(proxy), 1479 ¬ify_ops, 1480 virtio_bus_get_device(&proxy->bus), 1481 "virtio-pci-notify", 1482 proxy->notify.size); 1483 1484 memory_region_init_io(&proxy->notify_pio.mr, OBJECT(proxy), 1485 ¬ify_pio_ops, 1486 virtio_bus_get_device(&proxy->bus), 1487 "virtio-pci-notify-pio", 1488 proxy->notify_pio.size); 1489 } 1490 1491 static void virtio_pci_modern_region_map(VirtIOPCIProxy *proxy, 1492 VirtIOPCIRegion *region, 1493 struct virtio_pci_cap *cap, 1494 MemoryRegion *mr, 1495 uint8_t bar) 1496 { 1497 memory_region_add_subregion(mr, region->offset, ®ion->mr); 1498 1499 cap->cfg_type = region->type; 1500 cap->bar = bar; 1501 cap->offset = cpu_to_le32(region->offset); 1502 cap->length = cpu_to_le32(region->size); 1503 virtio_pci_add_mem_cap(proxy, cap); 1504 1505 } 1506 1507 static void virtio_pci_modern_mem_region_map(VirtIOPCIProxy *proxy, 1508 VirtIOPCIRegion *region, 1509 struct virtio_pci_cap *cap) 1510 { 1511 virtio_pci_modern_region_map(proxy, region, cap, 1512 &proxy->modern_bar, proxy->modern_mem_bar_idx); 1513 } 1514 1515 static void virtio_pci_modern_io_region_map(VirtIOPCIProxy *proxy, 1516 VirtIOPCIRegion *region, 1517 struct virtio_pci_cap *cap) 1518 { 1519 virtio_pci_modern_region_map(proxy, region, cap, 1520 &proxy->io_bar, proxy->modern_io_bar_idx); 1521 } 1522 1523 static void virtio_pci_modern_mem_region_unmap(VirtIOPCIProxy *proxy, 1524 VirtIOPCIRegion *region) 1525 { 1526 memory_region_del_subregion(&proxy->modern_bar, 1527 ®ion->mr); 1528 } 1529 1530 static void virtio_pci_modern_io_region_unmap(VirtIOPCIProxy *proxy, 1531 VirtIOPCIRegion *region) 1532 { 1533 memory_region_del_subregion(&proxy->io_bar, 1534 ®ion->mr); 1535 } 1536 1537 static void virtio_pci_pre_plugged(DeviceState *d, Error **errp) 1538 { 1539 VirtIOPCIProxy *proxy = VIRTIO_PCI(d); 1540 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 1541 1542 if (virtio_pci_modern(proxy)) { 1543 virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1); 1544 } 1545 1546 virtio_add_feature(&vdev->host_features, VIRTIO_F_BAD_FEATURE); 1547 } 1548 1549 /* This is called by virtio-bus just after the device is plugged. */ 1550 static void virtio_pci_device_plugged(DeviceState *d, Error **errp) 1551 { 1552 VirtIOPCIProxy *proxy = VIRTIO_PCI(d); 1553 VirtioBusState *bus = &proxy->bus; 1554 bool legacy = virtio_pci_legacy(proxy); 1555 bool modern; 1556 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY; 1557 uint8_t *config; 1558 uint32_t size; 1559 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 1560 1561 /* 1562 * Virtio capabilities present without 1563 * VIRTIO_F_VERSION_1 confuses guests 1564 */ 1565 if (!proxy->ignore_backend_features && 1566 !virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) { 1567 virtio_pci_disable_modern(proxy); 1568 1569 if (!legacy) { 1570 error_setg(errp, "Device doesn't support modern mode, and legacy" 1571 " mode is disabled"); 1572 error_append_hint(errp, "Set disable-legacy to off\n"); 1573 1574 return; 1575 } 1576 } 1577 1578 modern = virtio_pci_modern(proxy); 1579 1580 config = proxy->pci_dev.config; 1581 if (proxy->class_code) { 1582 pci_config_set_class(config, proxy->class_code); 1583 } 1584 1585 if (legacy) { 1586 if (virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM)) { 1587 error_setg(errp, "VIRTIO_F_IOMMU_PLATFORM was supported by" 1588 " neither legacy nor transitional device"); 1589 return ; 1590 } 1591 /* 1592 * Legacy and transitional devices use specific subsystem IDs. 1593 * Note that the subsystem vendor ID (config + PCI_SUBSYSTEM_VENDOR_ID) 1594 * is set to PCI_SUBVENDOR_ID_REDHAT_QUMRANET by default. 1595 */ 1596 pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus)); 1597 } else { 1598 /* pure virtio-1.0 */ 1599 pci_set_word(config + PCI_VENDOR_ID, 1600 PCI_VENDOR_ID_REDHAT_QUMRANET); 1601 pci_set_word(config + PCI_DEVICE_ID, 1602 0x1040 + virtio_bus_get_vdev_id(bus)); 1603 pci_config_set_revision(config, 1); 1604 } 1605 config[PCI_INTERRUPT_PIN] = 1; 1606 1607 1608 if (modern) { 1609 struct virtio_pci_cap cap = { 1610 .cap_len = sizeof cap, 1611 }; 1612 struct virtio_pci_notify_cap notify = { 1613 .cap.cap_len = sizeof notify, 1614 .notify_off_multiplier = 1615 cpu_to_le32(virtio_pci_queue_mem_mult(proxy)), 1616 }; 1617 struct virtio_pci_cfg_cap cfg = { 1618 .cap.cap_len = sizeof cfg, 1619 .cap.cfg_type = VIRTIO_PCI_CAP_PCI_CFG, 1620 }; 1621 struct virtio_pci_notify_cap notify_pio = { 1622 .cap.cap_len = sizeof notify, 1623 .notify_off_multiplier = cpu_to_le32(0x0), 1624 }; 1625 1626 struct virtio_pci_cfg_cap *cfg_mask; 1627 1628 virtio_pci_modern_regions_init(proxy); 1629 1630 virtio_pci_modern_mem_region_map(proxy, &proxy->common, &cap); 1631 virtio_pci_modern_mem_region_map(proxy, &proxy->isr, &cap); 1632 virtio_pci_modern_mem_region_map(proxy, &proxy->device, &cap); 1633 virtio_pci_modern_mem_region_map(proxy, &proxy->notify, ¬ify.cap); 1634 1635 if (modern_pio) { 1636 memory_region_init(&proxy->io_bar, OBJECT(proxy), 1637 "virtio-pci-io", 0x4); 1638 1639 pci_register_bar(&proxy->pci_dev, proxy->modern_io_bar_idx, 1640 PCI_BASE_ADDRESS_SPACE_IO, &proxy->io_bar); 1641 1642 virtio_pci_modern_io_region_map(proxy, &proxy->notify_pio, 1643 ¬ify_pio.cap); 1644 } 1645 1646 pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar_idx, 1647 PCI_BASE_ADDRESS_SPACE_MEMORY | 1648 PCI_BASE_ADDRESS_MEM_PREFETCH | 1649 PCI_BASE_ADDRESS_MEM_TYPE_64, 1650 &proxy->modern_bar); 1651 1652 proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap); 1653 cfg_mask = (void *)(proxy->pci_dev.wmask + proxy->config_cap); 1654 pci_set_byte(&cfg_mask->cap.bar, ~0x0); 1655 pci_set_long((uint8_t *)&cfg_mask->cap.offset, ~0x0); 1656 pci_set_long((uint8_t *)&cfg_mask->cap.length, ~0x0); 1657 pci_set_long(cfg_mask->pci_cfg_data, ~0x0); 1658 } 1659 1660 if (proxy->nvectors) { 1661 int err = msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1662 proxy->msix_bar_idx, NULL); 1663 if (err) { 1664 /* Notice when a system that supports MSIx can't initialize it */ 1665 if (err != -ENOTSUP) { 1666 error_report("unable to init msix vectors to %" PRIu32, 1667 proxy->nvectors); 1668 } 1669 proxy->nvectors = 0; 1670 } 1671 } 1672 1673 proxy->pci_dev.config_write = virtio_write_config; 1674 proxy->pci_dev.config_read = virtio_read_config; 1675 1676 if (legacy) { 1677 size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) 1678 + virtio_bus_get_vdev_config_len(bus); 1679 size = pow2ceil(size); 1680 1681 memory_region_init_io(&proxy->bar, OBJECT(proxy), 1682 &virtio_pci_config_ops, 1683 proxy, "virtio-pci", size); 1684 1685 pci_register_bar(&proxy->pci_dev, proxy->legacy_io_bar_idx, 1686 PCI_BASE_ADDRESS_SPACE_IO, &proxy->bar); 1687 } 1688 } 1689 1690 static void virtio_pci_device_unplugged(DeviceState *d) 1691 { 1692 VirtIOPCIProxy *proxy = VIRTIO_PCI(d); 1693 bool modern = virtio_pci_modern(proxy); 1694 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY; 1695 1696 virtio_pci_stop_ioeventfd(proxy); 1697 1698 if (modern) { 1699 virtio_pci_modern_mem_region_unmap(proxy, &proxy->common); 1700 virtio_pci_modern_mem_region_unmap(proxy, &proxy->isr); 1701 virtio_pci_modern_mem_region_unmap(proxy, &proxy->device); 1702 virtio_pci_modern_mem_region_unmap(proxy, &proxy->notify); 1703 if (modern_pio) { 1704 virtio_pci_modern_io_region_unmap(proxy, &proxy->notify_pio); 1705 } 1706 } 1707 } 1708 1709 static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp) 1710 { 1711 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev); 1712 VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev); 1713 bool pcie_port = pci_bus_is_express(pci_get_bus(pci_dev)) && 1714 !pci_bus_is_root(pci_get_bus(pci_dev)); 1715 1716 if (kvm_enabled() && !kvm_has_many_ioeventfds()) { 1717 proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; 1718 } 1719 1720 /* 1721 * virtio pci bar layout used by default. 1722 * subclasses can re-arrange things if needed. 1723 * 1724 * region 0 -- virtio legacy io bar 1725 * region 1 -- msi-x bar 1726 * region 4+5 -- virtio modern memory (64bit) bar 1727 * 1728 */ 1729 proxy->legacy_io_bar_idx = 0; 1730 proxy->msix_bar_idx = 1; 1731 proxy->modern_io_bar_idx = 2; 1732 proxy->modern_mem_bar_idx = 4; 1733 1734 proxy->common.offset = 0x0; 1735 proxy->common.size = 0x1000; 1736 proxy->common.type = VIRTIO_PCI_CAP_COMMON_CFG; 1737 1738 proxy->isr.offset = 0x1000; 1739 proxy->isr.size = 0x1000; 1740 proxy->isr.type = VIRTIO_PCI_CAP_ISR_CFG; 1741 1742 proxy->device.offset = 0x2000; 1743 proxy->device.size = 0x1000; 1744 proxy->device.type = VIRTIO_PCI_CAP_DEVICE_CFG; 1745 1746 proxy->notify.offset = 0x3000; 1747 proxy->notify.size = virtio_pci_queue_mem_mult(proxy) * VIRTIO_QUEUE_MAX; 1748 proxy->notify.type = VIRTIO_PCI_CAP_NOTIFY_CFG; 1749 1750 proxy->notify_pio.offset = 0x0; 1751 proxy->notify_pio.size = 0x4; 1752 proxy->notify_pio.type = VIRTIO_PCI_CAP_NOTIFY_CFG; 1753 1754 /* subclasses can enforce modern, so do this unconditionally */ 1755 memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci", 1756 /* PCI BAR regions must be powers of 2 */ 1757 pow2ceil(proxy->notify.offset + proxy->notify.size)); 1758 1759 if (proxy->disable_legacy == ON_OFF_AUTO_AUTO) { 1760 proxy->disable_legacy = pcie_port ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF; 1761 } 1762 1763 if (!virtio_pci_modern(proxy) && !virtio_pci_legacy(proxy)) { 1764 error_setg(errp, "device cannot work as neither modern nor legacy mode" 1765 " is enabled"); 1766 error_append_hint(errp, "Set either disable-modern or disable-legacy" 1767 " to off\n"); 1768 return; 1769 } 1770 1771 if (pcie_port && pci_is_express(pci_dev)) { 1772 int pos; 1773 1774 pos = pcie_endpoint_cap_init(pci_dev, 0); 1775 assert(pos > 0); 1776 1777 pos = pci_add_capability(pci_dev, PCI_CAP_ID_PM, 0, 1778 PCI_PM_SIZEOF, errp); 1779 if (pos < 0) { 1780 return; 1781 } 1782 1783 pci_dev->exp.pm_cap = pos; 1784 1785 /* 1786 * Indicates that this function complies with revision 1.2 of the 1787 * PCI Power Management Interface Specification. 1788 */ 1789 pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3); 1790 1791 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_DEVERR) { 1792 /* Init error enabling flags */ 1793 pcie_cap_deverr_init(pci_dev); 1794 } 1795 1796 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_LNKCTL) { 1797 /* Init Link Control Register */ 1798 pcie_cap_lnkctl_init(pci_dev); 1799 } 1800 1801 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_PM) { 1802 /* Init Power Management Control Register */ 1803 pci_set_word(pci_dev->wmask + pos + PCI_PM_CTRL, 1804 PCI_PM_CTRL_STATE_MASK); 1805 } 1806 1807 if (proxy->flags & VIRTIO_PCI_FLAG_ATS) { 1808 pcie_ats_init(pci_dev, 256); 1809 } 1810 1811 } else { 1812 /* 1813 * make future invocations of pci_is_express() return false 1814 * and pci_config_size() return PCI_CONFIG_SPACE_SIZE. 1815 */ 1816 pci_dev->cap_present &= ~QEMU_PCI_CAP_EXPRESS; 1817 } 1818 1819 virtio_pci_bus_new(&proxy->bus, sizeof(proxy->bus), proxy); 1820 if (k->realize) { 1821 k->realize(proxy, errp); 1822 } 1823 } 1824 1825 static void virtio_pci_exit(PCIDevice *pci_dev) 1826 { 1827 msix_uninit_exclusive_bar(pci_dev); 1828 } 1829 1830 static void virtio_pci_reset(DeviceState *qdev) 1831 { 1832 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev); 1833 VirtioBusState *bus = VIRTIO_BUS(&proxy->bus); 1834 PCIDevice *dev = PCI_DEVICE(qdev); 1835 int i; 1836 1837 virtio_pci_stop_ioeventfd(proxy); 1838 virtio_bus_reset(bus); 1839 msix_unuse_all_vectors(&proxy->pci_dev); 1840 1841 for (i = 0; i < VIRTIO_QUEUE_MAX; i++) { 1842 proxy->vqs[i].enabled = 0; 1843 proxy->vqs[i].num = 0; 1844 proxy->vqs[i].desc[0] = proxy->vqs[i].desc[1] = 0; 1845 proxy->vqs[i].avail[0] = proxy->vqs[i].avail[1] = 0; 1846 proxy->vqs[i].used[0] = proxy->vqs[i].used[1] = 0; 1847 } 1848 1849 if (pci_is_express(dev)) { 1850 pcie_cap_deverr_reset(dev); 1851 pcie_cap_lnkctl_reset(dev); 1852 1853 pci_set_word(dev->config + dev->exp.pm_cap + PCI_PM_CTRL, 0); 1854 } 1855 } 1856 1857 static Property virtio_pci_properties[] = { 1858 DEFINE_PROP_BIT("virtio-pci-bus-master-bug-migration", VirtIOPCIProxy, flags, 1859 VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT, false), 1860 DEFINE_PROP_ON_OFF_AUTO("disable-legacy", VirtIOPCIProxy, disable_legacy, 1861 ON_OFF_AUTO_AUTO), 1862 DEFINE_PROP_BOOL("disable-modern", VirtIOPCIProxy, disable_modern, false), 1863 DEFINE_PROP_BIT("migrate-extra", VirtIOPCIProxy, flags, 1864 VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT, true), 1865 DEFINE_PROP_BIT("modern-pio-notify", VirtIOPCIProxy, flags, 1866 VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT, false), 1867 DEFINE_PROP_BIT("x-disable-pcie", VirtIOPCIProxy, flags, 1868 VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT, false), 1869 DEFINE_PROP_BIT("page-per-vq", VirtIOPCIProxy, flags, 1870 VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT, false), 1871 DEFINE_PROP_BOOL("x-ignore-backend-features", VirtIOPCIProxy, 1872 ignore_backend_features, false), 1873 DEFINE_PROP_BIT("ats", VirtIOPCIProxy, flags, 1874 VIRTIO_PCI_FLAG_ATS_BIT, false), 1875 DEFINE_PROP_BIT("x-pcie-deverr-init", VirtIOPCIProxy, flags, 1876 VIRTIO_PCI_FLAG_INIT_DEVERR_BIT, true), 1877 DEFINE_PROP_BIT("x-pcie-lnkctl-init", VirtIOPCIProxy, flags, 1878 VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT, true), 1879 DEFINE_PROP_BIT("x-pcie-pm-init", VirtIOPCIProxy, flags, 1880 VIRTIO_PCI_FLAG_INIT_PM_BIT, true), 1881 DEFINE_PROP_END_OF_LIST(), 1882 }; 1883 1884 static void virtio_pci_dc_realize(DeviceState *qdev, Error **errp) 1885 { 1886 VirtioPCIClass *vpciklass = VIRTIO_PCI_GET_CLASS(qdev); 1887 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev); 1888 PCIDevice *pci_dev = &proxy->pci_dev; 1889 1890 if (!(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_PCIE) && 1891 virtio_pci_modern(proxy)) { 1892 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS; 1893 } 1894 1895 vpciklass->parent_dc_realize(qdev, errp); 1896 } 1897 1898 static void virtio_pci_class_init(ObjectClass *klass, void *data) 1899 { 1900 DeviceClass *dc = DEVICE_CLASS(klass); 1901 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 1902 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass); 1903 1904 dc->props = virtio_pci_properties; 1905 k->realize = virtio_pci_realize; 1906 k->exit = virtio_pci_exit; 1907 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1908 k->revision = VIRTIO_PCI_ABI_VERSION; 1909 k->class_id = PCI_CLASS_OTHERS; 1910 device_class_set_parent_realize(dc, virtio_pci_dc_realize, 1911 &vpciklass->parent_dc_realize); 1912 dc->reset = virtio_pci_reset; 1913 } 1914 1915 static const TypeInfo virtio_pci_info = { 1916 .name = TYPE_VIRTIO_PCI, 1917 .parent = TYPE_PCI_DEVICE, 1918 .instance_size = sizeof(VirtIOPCIProxy), 1919 .class_init = virtio_pci_class_init, 1920 .class_size = sizeof(VirtioPCIClass), 1921 .abstract = true, 1922 .interfaces = (InterfaceInfo[]) { 1923 { INTERFACE_PCIE_DEVICE }, 1924 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 1925 { } 1926 }, 1927 }; 1928 1929 /* virtio-blk-pci */ 1930 1931 static Property virtio_blk_pci_properties[] = { 1932 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 1933 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1934 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1935 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 1936 DEV_NVECTORS_UNSPECIFIED), 1937 DEFINE_PROP_END_OF_LIST(), 1938 }; 1939 1940 static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 1941 { 1942 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev); 1943 DeviceState *vdev = DEVICE(&dev->vdev); 1944 1945 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 1946 vpci_dev->nvectors = dev->vdev.conf.num_queues + 1; 1947 } 1948 1949 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1950 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 1951 } 1952 1953 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data) 1954 { 1955 DeviceClass *dc = DEVICE_CLASS(klass); 1956 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1957 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1958 1959 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1960 dc->props = virtio_blk_pci_properties; 1961 k->realize = virtio_blk_pci_realize; 1962 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1963 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; 1964 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1965 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 1966 } 1967 1968 static void virtio_blk_pci_instance_init(Object *obj) 1969 { 1970 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj); 1971 1972 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 1973 TYPE_VIRTIO_BLK); 1974 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 1975 "bootindex", &error_abort); 1976 } 1977 1978 static const TypeInfo virtio_blk_pci_info = { 1979 .name = TYPE_VIRTIO_BLK_PCI, 1980 .parent = TYPE_VIRTIO_PCI, 1981 .instance_size = sizeof(VirtIOBlkPCI), 1982 .instance_init = virtio_blk_pci_instance_init, 1983 .class_init = virtio_blk_pci_class_init, 1984 }; 1985 1986 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) 1987 /* vhost-user-blk */ 1988 1989 static Property vhost_user_blk_pci_properties[] = { 1990 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 1991 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 1992 DEV_NVECTORS_UNSPECIFIED), 1993 DEFINE_PROP_END_OF_LIST(), 1994 }; 1995 1996 static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 1997 { 1998 VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev); 1999 DeviceState *vdev = DEVICE(&dev->vdev); 2000 2001 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 2002 vpci_dev->nvectors = dev->vdev.num_queues + 1; 2003 } 2004 2005 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2006 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2007 } 2008 2009 static void vhost_user_blk_pci_class_init(ObjectClass *klass, void *data) 2010 { 2011 DeviceClass *dc = DEVICE_CLASS(klass); 2012 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2013 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2014 2015 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2016 dc->props = vhost_user_blk_pci_properties; 2017 k->realize = vhost_user_blk_pci_realize; 2018 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2019 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; 2020 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 2021 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 2022 } 2023 2024 static void vhost_user_blk_pci_instance_init(Object *obj) 2025 { 2026 VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj); 2027 2028 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2029 TYPE_VHOST_USER_BLK); 2030 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 2031 "bootindex", &error_abort); 2032 } 2033 2034 static const TypeInfo vhost_user_blk_pci_info = { 2035 .name = TYPE_VHOST_USER_BLK_PCI, 2036 .parent = TYPE_VIRTIO_PCI, 2037 .instance_size = sizeof(VHostUserBlkPCI), 2038 .instance_init = vhost_user_blk_pci_instance_init, 2039 .class_init = vhost_user_blk_pci_class_init, 2040 }; 2041 #endif 2042 2043 /* virtio-scsi-pci */ 2044 2045 static Property virtio_scsi_pci_properties[] = { 2046 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 2047 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 2048 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2049 DEV_NVECTORS_UNSPECIFIED), 2050 DEFINE_PROP_END_OF_LIST(), 2051 }; 2052 2053 static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2054 { 2055 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev); 2056 DeviceState *vdev = DEVICE(&dev->vdev); 2057 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); 2058 DeviceState *proxy = DEVICE(vpci_dev); 2059 char *bus_name; 2060 2061 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 2062 vpci_dev->nvectors = vs->conf.num_queues + 3; 2063 } 2064 2065 /* 2066 * For command line compatibility, this sets the virtio-scsi-device bus 2067 * name as before. 2068 */ 2069 if (proxy->id) { 2070 bus_name = g_strdup_printf("%s.0", proxy->id); 2071 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 2072 g_free(bus_name); 2073 } 2074 2075 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2076 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2077 } 2078 2079 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data) 2080 { 2081 DeviceClass *dc = DEVICE_CLASS(klass); 2082 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2083 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2084 2085 k->realize = virtio_scsi_pci_realize; 2086 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2087 dc->props = virtio_scsi_pci_properties; 2088 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2089 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 2090 pcidev_k->revision = 0x00; 2091 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 2092 } 2093 2094 static void virtio_scsi_pci_instance_init(Object *obj) 2095 { 2096 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj); 2097 2098 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2099 TYPE_VIRTIO_SCSI); 2100 } 2101 2102 static const TypeInfo virtio_scsi_pci_info = { 2103 .name = TYPE_VIRTIO_SCSI_PCI, 2104 .parent = TYPE_VIRTIO_PCI, 2105 .instance_size = sizeof(VirtIOSCSIPCI), 2106 .instance_init = virtio_scsi_pci_instance_init, 2107 .class_init = virtio_scsi_pci_class_init, 2108 }; 2109 2110 /* vhost-scsi-pci */ 2111 2112 #ifdef CONFIG_VHOST_SCSI 2113 static Property vhost_scsi_pci_properties[] = { 2114 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2115 DEV_NVECTORS_UNSPECIFIED), 2116 DEFINE_PROP_END_OF_LIST(), 2117 }; 2118 2119 static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2120 { 2121 VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev); 2122 DeviceState *vdev = DEVICE(&dev->vdev); 2123 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); 2124 2125 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 2126 vpci_dev->nvectors = vs->conf.num_queues + 3; 2127 } 2128 2129 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2130 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2131 } 2132 2133 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data) 2134 { 2135 DeviceClass *dc = DEVICE_CLASS(klass); 2136 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2137 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2138 k->realize = vhost_scsi_pci_realize; 2139 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2140 dc->props = vhost_scsi_pci_properties; 2141 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2142 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 2143 pcidev_k->revision = 0x00; 2144 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 2145 } 2146 2147 static void vhost_scsi_pci_instance_init(Object *obj) 2148 { 2149 VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj); 2150 2151 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2152 TYPE_VHOST_SCSI); 2153 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 2154 "bootindex", &error_abort); 2155 } 2156 2157 static const TypeInfo vhost_scsi_pci_info = { 2158 .name = TYPE_VHOST_SCSI_PCI, 2159 .parent = TYPE_VIRTIO_PCI, 2160 .instance_size = sizeof(VHostSCSIPCI), 2161 .instance_init = vhost_scsi_pci_instance_init, 2162 .class_init = vhost_scsi_pci_class_init, 2163 }; 2164 #endif 2165 2166 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) 2167 /* vhost-user-scsi-pci */ 2168 static Property vhost_user_scsi_pci_properties[] = { 2169 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2170 DEV_NVECTORS_UNSPECIFIED), 2171 DEFINE_PROP_END_OF_LIST(), 2172 }; 2173 2174 static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2175 { 2176 VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(vpci_dev); 2177 DeviceState *vdev = DEVICE(&dev->vdev); 2178 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); 2179 2180 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 2181 vpci_dev->nvectors = vs->conf.num_queues + 3; 2182 } 2183 2184 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2185 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2186 } 2187 2188 static void vhost_user_scsi_pci_class_init(ObjectClass *klass, void *data) 2189 { 2190 DeviceClass *dc = DEVICE_CLASS(klass); 2191 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2192 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2193 k->realize = vhost_user_scsi_pci_realize; 2194 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2195 dc->props = vhost_user_scsi_pci_properties; 2196 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2197 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 2198 pcidev_k->revision = 0x00; 2199 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 2200 } 2201 2202 static void vhost_user_scsi_pci_instance_init(Object *obj) 2203 { 2204 VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj); 2205 2206 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2207 TYPE_VHOST_USER_SCSI); 2208 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 2209 "bootindex", &error_abort); 2210 } 2211 2212 static const TypeInfo vhost_user_scsi_pci_info = { 2213 .name = TYPE_VHOST_USER_SCSI_PCI, 2214 .parent = TYPE_VIRTIO_PCI, 2215 .instance_size = sizeof(VHostUserSCSIPCI), 2216 .instance_init = vhost_user_scsi_pci_instance_init, 2217 .class_init = vhost_user_scsi_pci_class_init, 2218 }; 2219 #endif 2220 2221 /* vhost-vsock-pci */ 2222 2223 #ifdef CONFIG_VHOST_VSOCK 2224 static Property vhost_vsock_pci_properties[] = { 2225 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), 2226 DEFINE_PROP_END_OF_LIST(), 2227 }; 2228 2229 static void vhost_vsock_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2230 { 2231 VHostVSockPCI *dev = VHOST_VSOCK_PCI(vpci_dev); 2232 DeviceState *vdev = DEVICE(&dev->vdev); 2233 2234 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2235 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2236 } 2237 2238 static void vhost_vsock_pci_class_init(ObjectClass *klass, void *data) 2239 { 2240 DeviceClass *dc = DEVICE_CLASS(klass); 2241 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2242 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2243 k->realize = vhost_vsock_pci_realize; 2244 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 2245 dc->props = vhost_vsock_pci_properties; 2246 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2247 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_VSOCK; 2248 pcidev_k->revision = 0x00; 2249 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER; 2250 } 2251 2252 static void vhost_vsock_pci_instance_init(Object *obj) 2253 { 2254 VHostVSockPCI *dev = VHOST_VSOCK_PCI(obj); 2255 2256 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2257 TYPE_VHOST_VSOCK); 2258 } 2259 2260 static const TypeInfo vhost_vsock_pci_info = { 2261 .name = TYPE_VHOST_VSOCK_PCI, 2262 .parent = TYPE_VIRTIO_PCI, 2263 .instance_size = sizeof(VHostVSockPCI), 2264 .instance_init = vhost_vsock_pci_instance_init, 2265 .class_init = vhost_vsock_pci_class_init, 2266 }; 2267 #endif 2268 2269 /* virtio-balloon-pci */ 2270 2271 static Property virtio_balloon_pci_properties[] = { 2272 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 2273 DEFINE_PROP_END_OF_LIST(), 2274 }; 2275 2276 static void virtio_balloon_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2277 { 2278 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev); 2279 DeviceState *vdev = DEVICE(&dev->vdev); 2280 2281 if (vpci_dev->class_code != PCI_CLASS_OTHERS && 2282 vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */ 2283 vpci_dev->class_code = PCI_CLASS_OTHERS; 2284 } 2285 2286 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2287 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2288 } 2289 2290 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data) 2291 { 2292 DeviceClass *dc = DEVICE_CLASS(klass); 2293 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2294 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2295 k->realize = virtio_balloon_pci_realize; 2296 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 2297 dc->props = virtio_balloon_pci_properties; 2298 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2299 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON; 2300 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 2301 pcidev_k->class_id = PCI_CLASS_OTHERS; 2302 } 2303 2304 static void virtio_balloon_pci_instance_init(Object *obj) 2305 { 2306 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj); 2307 2308 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2309 TYPE_VIRTIO_BALLOON); 2310 object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev), 2311 "guest-stats", &error_abort); 2312 object_property_add_alias(obj, "guest-stats-polling-interval", 2313 OBJECT(&dev->vdev), 2314 "guest-stats-polling-interval", &error_abort); 2315 } 2316 2317 static const TypeInfo virtio_balloon_pci_info = { 2318 .name = TYPE_VIRTIO_BALLOON_PCI, 2319 .parent = TYPE_VIRTIO_PCI, 2320 .instance_size = sizeof(VirtIOBalloonPCI), 2321 .instance_init = virtio_balloon_pci_instance_init, 2322 .class_init = virtio_balloon_pci_class_init, 2323 }; 2324 2325 /* virtio-serial-pci */ 2326 2327 static void virtio_serial_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2328 { 2329 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev); 2330 DeviceState *vdev = DEVICE(&dev->vdev); 2331 DeviceState *proxy = DEVICE(vpci_dev); 2332 char *bus_name; 2333 2334 if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER && 2335 vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */ 2336 vpci_dev->class_code != PCI_CLASS_OTHERS) { /* qemu-kvm */ 2337 vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER; 2338 } 2339 2340 /* backwards-compatibility with machines that were created with 2341 DEV_NVECTORS_UNSPECIFIED */ 2342 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 2343 vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1; 2344 } 2345 2346 /* 2347 * For command line compatibility, this sets the virtio-serial-device bus 2348 * name as before. 2349 */ 2350 if (proxy->id) { 2351 bus_name = g_strdup_printf("%s.0", proxy->id); 2352 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 2353 g_free(bus_name); 2354 } 2355 2356 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2357 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2358 } 2359 2360 static Property virtio_serial_pci_properties[] = { 2361 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 2362 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 2363 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 2364 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 2365 DEFINE_PROP_END_OF_LIST(), 2366 }; 2367 2368 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data) 2369 { 2370 DeviceClass *dc = DEVICE_CLASS(klass); 2371 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2372 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2373 k->realize = virtio_serial_pci_realize; 2374 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 2375 dc->props = virtio_serial_pci_properties; 2376 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2377 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE; 2378 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 2379 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER; 2380 } 2381 2382 static void virtio_serial_pci_instance_init(Object *obj) 2383 { 2384 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj); 2385 2386 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2387 TYPE_VIRTIO_SERIAL); 2388 } 2389 2390 static const TypeInfo virtio_serial_pci_info = { 2391 .name = TYPE_VIRTIO_SERIAL_PCI, 2392 .parent = TYPE_VIRTIO_PCI, 2393 .instance_size = sizeof(VirtIOSerialPCI), 2394 .instance_init = virtio_serial_pci_instance_init, 2395 .class_init = virtio_serial_pci_class_init, 2396 }; 2397 2398 /* virtio-net-pci */ 2399 2400 static Property virtio_net_properties[] = { 2401 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 2402 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 2403 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), 2404 DEFINE_PROP_END_OF_LIST(), 2405 }; 2406 2407 static void virtio_net_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2408 { 2409 DeviceState *qdev = DEVICE(vpci_dev); 2410 VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev); 2411 DeviceState *vdev = DEVICE(&dev->vdev); 2412 2413 virtio_net_set_netclient_name(&dev->vdev, qdev->id, 2414 object_get_typename(OBJECT(qdev))); 2415 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2416 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2417 } 2418 2419 static void virtio_net_pci_class_init(ObjectClass *klass, void *data) 2420 { 2421 DeviceClass *dc = DEVICE_CLASS(klass); 2422 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 2423 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass); 2424 2425 k->romfile = "efi-virtio.rom"; 2426 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2427 k->device_id = PCI_DEVICE_ID_VIRTIO_NET; 2428 k->revision = VIRTIO_PCI_ABI_VERSION; 2429 k->class_id = PCI_CLASS_NETWORK_ETHERNET; 2430 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 2431 dc->props = virtio_net_properties; 2432 vpciklass->realize = virtio_net_pci_realize; 2433 } 2434 2435 static void virtio_net_pci_instance_init(Object *obj) 2436 { 2437 VirtIONetPCI *dev = VIRTIO_NET_PCI(obj); 2438 2439 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2440 TYPE_VIRTIO_NET); 2441 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 2442 "bootindex", &error_abort); 2443 } 2444 2445 static const TypeInfo virtio_net_pci_info = { 2446 .name = TYPE_VIRTIO_NET_PCI, 2447 .parent = TYPE_VIRTIO_PCI, 2448 .instance_size = sizeof(VirtIONetPCI), 2449 .instance_init = virtio_net_pci_instance_init, 2450 .class_init = virtio_net_pci_class_init, 2451 }; 2452 2453 /* virtio-rng-pci */ 2454 2455 static void virtio_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2456 { 2457 VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev); 2458 DeviceState *vdev = DEVICE(&vrng->vdev); 2459 Error *err = NULL; 2460 2461 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2462 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 2463 if (err) { 2464 error_propagate(errp, err); 2465 return; 2466 } 2467 2468 object_property_set_link(OBJECT(vrng), 2469 OBJECT(vrng->vdev.conf.rng), "rng", 2470 NULL); 2471 } 2472 2473 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data) 2474 { 2475 DeviceClass *dc = DEVICE_CLASS(klass); 2476 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2477 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2478 2479 k->realize = virtio_rng_pci_realize; 2480 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 2481 2482 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2483 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG; 2484 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 2485 pcidev_k->class_id = PCI_CLASS_OTHERS; 2486 } 2487 2488 static void virtio_rng_initfn(Object *obj) 2489 { 2490 VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj); 2491 2492 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2493 TYPE_VIRTIO_RNG); 2494 } 2495 2496 static const TypeInfo virtio_rng_pci_info = { 2497 .name = TYPE_VIRTIO_RNG_PCI, 2498 .parent = TYPE_VIRTIO_PCI, 2499 .instance_size = sizeof(VirtIORngPCI), 2500 .instance_init = virtio_rng_initfn, 2501 .class_init = virtio_rng_pci_class_init, 2502 }; 2503 2504 /* virtio-input-pci */ 2505 2506 static Property virtio_input_pci_properties[] = { 2507 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 2508 DEFINE_PROP_END_OF_LIST(), 2509 }; 2510 2511 static void virtio_input_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2512 { 2513 VirtIOInputPCI *vinput = VIRTIO_INPUT_PCI(vpci_dev); 2514 DeviceState *vdev = DEVICE(&vinput->vdev); 2515 2516 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2517 virtio_pci_force_virtio_1(vpci_dev); 2518 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2519 } 2520 2521 static void virtio_input_pci_class_init(ObjectClass *klass, void *data) 2522 { 2523 DeviceClass *dc = DEVICE_CLASS(klass); 2524 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2525 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2526 2527 dc->props = virtio_input_pci_properties; 2528 k->realize = virtio_input_pci_realize; 2529 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 2530 2531 pcidev_k->class_id = PCI_CLASS_INPUT_OTHER; 2532 } 2533 2534 static void virtio_input_hid_kbd_pci_class_init(ObjectClass *klass, void *data) 2535 { 2536 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2537 2538 pcidev_k->class_id = PCI_CLASS_INPUT_KEYBOARD; 2539 } 2540 2541 static void virtio_input_hid_mouse_pci_class_init(ObjectClass *klass, 2542 void *data) 2543 { 2544 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2545 2546 pcidev_k->class_id = PCI_CLASS_INPUT_MOUSE; 2547 } 2548 2549 static void virtio_keyboard_initfn(Object *obj) 2550 { 2551 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj); 2552 2553 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2554 TYPE_VIRTIO_KEYBOARD); 2555 } 2556 2557 static void virtio_mouse_initfn(Object *obj) 2558 { 2559 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj); 2560 2561 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2562 TYPE_VIRTIO_MOUSE); 2563 } 2564 2565 static void virtio_tablet_initfn(Object *obj) 2566 { 2567 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj); 2568 2569 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2570 TYPE_VIRTIO_TABLET); 2571 } 2572 2573 static const TypeInfo virtio_input_pci_info = { 2574 .name = TYPE_VIRTIO_INPUT_PCI, 2575 .parent = TYPE_VIRTIO_PCI, 2576 .instance_size = sizeof(VirtIOInputPCI), 2577 .class_init = virtio_input_pci_class_init, 2578 .abstract = true, 2579 }; 2580 2581 static const TypeInfo virtio_input_hid_pci_info = { 2582 .name = TYPE_VIRTIO_INPUT_HID_PCI, 2583 .parent = TYPE_VIRTIO_INPUT_PCI, 2584 .instance_size = sizeof(VirtIOInputHIDPCI), 2585 .abstract = true, 2586 }; 2587 2588 static const TypeInfo virtio_keyboard_pci_info = { 2589 .name = TYPE_VIRTIO_KEYBOARD_PCI, 2590 .parent = TYPE_VIRTIO_INPUT_HID_PCI, 2591 .class_init = virtio_input_hid_kbd_pci_class_init, 2592 .instance_size = sizeof(VirtIOInputHIDPCI), 2593 .instance_init = virtio_keyboard_initfn, 2594 }; 2595 2596 static const TypeInfo virtio_mouse_pci_info = { 2597 .name = TYPE_VIRTIO_MOUSE_PCI, 2598 .parent = TYPE_VIRTIO_INPUT_HID_PCI, 2599 .class_init = virtio_input_hid_mouse_pci_class_init, 2600 .instance_size = sizeof(VirtIOInputHIDPCI), 2601 .instance_init = virtio_mouse_initfn, 2602 }; 2603 2604 static const TypeInfo virtio_tablet_pci_info = { 2605 .name = TYPE_VIRTIO_TABLET_PCI, 2606 .parent = TYPE_VIRTIO_INPUT_HID_PCI, 2607 .instance_size = sizeof(VirtIOInputHIDPCI), 2608 .instance_init = virtio_tablet_initfn, 2609 }; 2610 2611 #ifdef CONFIG_LINUX 2612 static void virtio_host_initfn(Object *obj) 2613 { 2614 VirtIOInputHostPCI *dev = VIRTIO_INPUT_HOST_PCI(obj); 2615 2616 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2617 TYPE_VIRTIO_INPUT_HOST); 2618 } 2619 2620 static const TypeInfo virtio_host_pci_info = { 2621 .name = TYPE_VIRTIO_INPUT_HOST_PCI, 2622 .parent = TYPE_VIRTIO_INPUT_PCI, 2623 .instance_size = sizeof(VirtIOInputHostPCI), 2624 .instance_init = virtio_host_initfn, 2625 }; 2626 #endif 2627 2628 /* virtio-pci-bus */ 2629 2630 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size, 2631 VirtIOPCIProxy *dev) 2632 { 2633 DeviceState *qdev = DEVICE(dev); 2634 char virtio_bus_name[] = "virtio-bus"; 2635 2636 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev, 2637 virtio_bus_name); 2638 } 2639 2640 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data) 2641 { 2642 BusClass *bus_class = BUS_CLASS(klass); 2643 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 2644 bus_class->max_dev = 1; 2645 k->notify = virtio_pci_notify; 2646 k->save_config = virtio_pci_save_config; 2647 k->load_config = virtio_pci_load_config; 2648 k->save_queue = virtio_pci_save_queue; 2649 k->load_queue = virtio_pci_load_queue; 2650 k->save_extra_state = virtio_pci_save_extra_state; 2651 k->load_extra_state = virtio_pci_load_extra_state; 2652 k->has_extra_state = virtio_pci_has_extra_state; 2653 k->query_guest_notifiers = virtio_pci_query_guest_notifiers; 2654 k->set_guest_notifiers = virtio_pci_set_guest_notifiers; 2655 k->vmstate_change = virtio_pci_vmstate_change; 2656 k->pre_plugged = virtio_pci_pre_plugged; 2657 k->device_plugged = virtio_pci_device_plugged; 2658 k->device_unplugged = virtio_pci_device_unplugged; 2659 k->query_nvectors = virtio_pci_query_nvectors; 2660 k->ioeventfd_enabled = virtio_pci_ioeventfd_enabled; 2661 k->ioeventfd_assign = virtio_pci_ioeventfd_assign; 2662 k->get_dma_as = virtio_pci_get_dma_as; 2663 } 2664 2665 static const TypeInfo virtio_pci_bus_info = { 2666 .name = TYPE_VIRTIO_PCI_BUS, 2667 .parent = TYPE_VIRTIO_BUS, 2668 .instance_size = sizeof(VirtioPCIBusState), 2669 .class_init = virtio_pci_bus_class_init, 2670 }; 2671 2672 static void virtio_pci_register_types(void) 2673 { 2674 type_register_static(&virtio_rng_pci_info); 2675 type_register_static(&virtio_input_pci_info); 2676 type_register_static(&virtio_input_hid_pci_info); 2677 type_register_static(&virtio_keyboard_pci_info); 2678 type_register_static(&virtio_mouse_pci_info); 2679 type_register_static(&virtio_tablet_pci_info); 2680 #ifdef CONFIG_LINUX 2681 type_register_static(&virtio_host_pci_info); 2682 #endif 2683 type_register_static(&virtio_pci_bus_info); 2684 type_register_static(&virtio_pci_info); 2685 #ifdef CONFIG_VIRTFS 2686 type_register_static(&virtio_9p_pci_info); 2687 #endif 2688 type_register_static(&virtio_blk_pci_info); 2689 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) 2690 type_register_static(&vhost_user_blk_pci_info); 2691 #endif 2692 type_register_static(&virtio_scsi_pci_info); 2693 type_register_static(&virtio_balloon_pci_info); 2694 type_register_static(&virtio_serial_pci_info); 2695 type_register_static(&virtio_net_pci_info); 2696 #ifdef CONFIG_VHOST_SCSI 2697 type_register_static(&vhost_scsi_pci_info); 2698 #endif 2699 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) 2700 type_register_static(&vhost_user_scsi_pci_info); 2701 #endif 2702 #ifdef CONFIG_VHOST_VSOCK 2703 type_register_static(&vhost_vsock_pci_info); 2704 #endif 2705 } 2706 2707 type_init(virtio_pci_register_types) 2708