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 "virtio-pci.h" 36 #include "qemu/range.h" 37 #include "hw/virtio/virtio-bus.h" 38 #include "qapi/visitor.h" 39 40 #define VIRTIO_PCI_REGION_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_present(dev)) 41 42 #undef VIRTIO_PCI_CONFIG 43 44 /* The remaining space is defined by each driver as the per-driver 45 * configuration space */ 46 #define VIRTIO_PCI_CONFIG_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_enabled(dev)) 47 48 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size, 49 VirtIOPCIProxy *dev); 50 static void virtio_pci_reset(DeviceState *qdev); 51 52 /* virtio device */ 53 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */ 54 static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d) 55 { 56 return container_of(d, VirtIOPCIProxy, pci_dev.qdev); 57 } 58 59 /* DeviceState to VirtIOPCIProxy. Note: used on datapath, 60 * be careful and test performance if you change this. 61 */ 62 static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d) 63 { 64 return container_of(d, VirtIOPCIProxy, pci_dev.qdev); 65 } 66 67 static void virtio_pci_notify(DeviceState *d, uint16_t vector) 68 { 69 VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d); 70 71 if (msix_enabled(&proxy->pci_dev)) 72 msix_notify(&proxy->pci_dev, vector); 73 else { 74 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 75 pci_set_irq(&proxy->pci_dev, atomic_read(&vdev->isr) & 1); 76 } 77 } 78 79 static void virtio_pci_save_config(DeviceState *d, QEMUFile *f) 80 { 81 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 82 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 83 84 pci_device_save(&proxy->pci_dev, f); 85 msix_save(&proxy->pci_dev, f); 86 if (msix_present(&proxy->pci_dev)) 87 qemu_put_be16(f, vdev->config_vector); 88 } 89 90 static const VMStateDescription vmstate_virtio_pci_modern_queue_state = { 91 .name = "virtio_pci/modern_queue_state", 92 .version_id = 1, 93 .minimum_version_id = 1, 94 .fields = (VMStateField[]) { 95 VMSTATE_UINT16(num, VirtIOPCIQueue), 96 VMSTATE_UNUSED(1), /* enabled was stored as be16 */ 97 VMSTATE_BOOL(enabled, VirtIOPCIQueue), 98 VMSTATE_UINT32_ARRAY(desc, VirtIOPCIQueue, 2), 99 VMSTATE_UINT32_ARRAY(avail, VirtIOPCIQueue, 2), 100 VMSTATE_UINT32_ARRAY(used, VirtIOPCIQueue, 2), 101 VMSTATE_END_OF_LIST() 102 } 103 }; 104 105 static bool virtio_pci_modern_state_needed(void *opaque) 106 { 107 VirtIOPCIProxy *proxy = opaque; 108 109 return virtio_pci_modern(proxy); 110 } 111 112 static const VMStateDescription vmstate_virtio_pci_modern_state_sub = { 113 .name = "virtio_pci/modern_state", 114 .version_id = 1, 115 .minimum_version_id = 1, 116 .needed = &virtio_pci_modern_state_needed, 117 .fields = (VMStateField[]) { 118 VMSTATE_UINT32(dfselect, VirtIOPCIProxy), 119 VMSTATE_UINT32(gfselect, VirtIOPCIProxy), 120 VMSTATE_UINT32_ARRAY(guest_features, VirtIOPCIProxy, 2), 121 VMSTATE_STRUCT_ARRAY(vqs, VirtIOPCIProxy, VIRTIO_QUEUE_MAX, 0, 122 vmstate_virtio_pci_modern_queue_state, 123 VirtIOPCIQueue), 124 VMSTATE_END_OF_LIST() 125 } 126 }; 127 128 static const VMStateDescription vmstate_virtio_pci = { 129 .name = "virtio_pci", 130 .version_id = 1, 131 .minimum_version_id = 1, 132 .minimum_version_id_old = 1, 133 .fields = (VMStateField[]) { 134 VMSTATE_END_OF_LIST() 135 }, 136 .subsections = (const VMStateDescription*[]) { 137 &vmstate_virtio_pci_modern_state_sub, 138 NULL 139 } 140 }; 141 142 static bool virtio_pci_has_extra_state(DeviceState *d) 143 { 144 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 145 146 return proxy->flags & VIRTIO_PCI_FLAG_MIGRATE_EXTRA; 147 } 148 149 static void virtio_pci_save_extra_state(DeviceState *d, QEMUFile *f) 150 { 151 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 152 153 vmstate_save_state(f, &vmstate_virtio_pci, proxy, NULL); 154 } 155 156 static int virtio_pci_load_extra_state(DeviceState *d, QEMUFile *f) 157 { 158 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 159 160 return vmstate_load_state(f, &vmstate_virtio_pci, proxy, 1); 161 } 162 163 static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f) 164 { 165 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 166 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 167 168 if (msix_present(&proxy->pci_dev)) 169 qemu_put_be16(f, virtio_queue_vector(vdev, n)); 170 } 171 172 static int virtio_pci_load_config(DeviceState *d, QEMUFile *f) 173 { 174 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 175 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 176 177 int ret; 178 ret = pci_device_load(&proxy->pci_dev, f); 179 if (ret) { 180 return ret; 181 } 182 msix_unuse_all_vectors(&proxy->pci_dev); 183 msix_load(&proxy->pci_dev, f); 184 if (msix_present(&proxy->pci_dev)) { 185 qemu_get_be16s(f, &vdev->config_vector); 186 } else { 187 vdev->config_vector = VIRTIO_NO_VECTOR; 188 } 189 if (vdev->config_vector != VIRTIO_NO_VECTOR) { 190 return msix_vector_use(&proxy->pci_dev, vdev->config_vector); 191 } 192 return 0; 193 } 194 195 static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f) 196 { 197 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 198 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 199 200 uint16_t vector; 201 if (msix_present(&proxy->pci_dev)) { 202 qemu_get_be16s(f, &vector); 203 } else { 204 vector = VIRTIO_NO_VECTOR; 205 } 206 virtio_queue_set_vector(vdev, n, vector); 207 if (vector != VIRTIO_NO_VECTOR) { 208 return msix_vector_use(&proxy->pci_dev, vector); 209 } 210 211 return 0; 212 } 213 214 static bool virtio_pci_ioeventfd_enabled(DeviceState *d) 215 { 216 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 217 218 return (proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) != 0; 219 } 220 221 #define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000 222 223 static inline int virtio_pci_queue_mem_mult(struct VirtIOPCIProxy *proxy) 224 { 225 return (proxy->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ) ? 226 QEMU_VIRTIO_PCI_QUEUE_MEM_MULT : 4; 227 } 228 229 static int virtio_pci_ioeventfd_assign(DeviceState *d, EventNotifier *notifier, 230 int n, bool assign) 231 { 232 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 233 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 234 VirtQueue *vq = virtio_get_queue(vdev, n); 235 bool legacy = virtio_pci_legacy(proxy); 236 bool modern = virtio_pci_modern(proxy); 237 bool fast_mmio = kvm_ioeventfd_any_length_enabled(); 238 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY; 239 MemoryRegion *modern_mr = &proxy->notify.mr; 240 MemoryRegion *modern_notify_mr = &proxy->notify_pio.mr; 241 MemoryRegion *legacy_mr = &proxy->bar; 242 hwaddr modern_addr = virtio_pci_queue_mem_mult(proxy) * 243 virtio_get_queue_index(vq); 244 hwaddr legacy_addr = VIRTIO_PCI_QUEUE_NOTIFY; 245 246 if (assign) { 247 if (modern) { 248 if (fast_mmio) { 249 memory_region_add_eventfd(modern_mr, modern_addr, 0, 250 false, n, notifier); 251 } else { 252 memory_region_add_eventfd(modern_mr, modern_addr, 2, 253 false, n, notifier); 254 } 255 if (modern_pio) { 256 memory_region_add_eventfd(modern_notify_mr, 0, 2, 257 true, n, notifier); 258 } 259 } 260 if (legacy) { 261 memory_region_add_eventfd(legacy_mr, legacy_addr, 2, 262 true, n, notifier); 263 } 264 } else { 265 if (modern) { 266 if (fast_mmio) { 267 memory_region_del_eventfd(modern_mr, modern_addr, 0, 268 false, n, notifier); 269 } else { 270 memory_region_del_eventfd(modern_mr, modern_addr, 2, 271 false, n, notifier); 272 } 273 if (modern_pio) { 274 memory_region_del_eventfd(modern_notify_mr, 0, 2, 275 true, n, notifier); 276 } 277 } 278 if (legacy) { 279 memory_region_del_eventfd(legacy_mr, legacy_addr, 2, 280 true, n, notifier); 281 } 282 } 283 return 0; 284 } 285 286 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy) 287 { 288 virtio_bus_start_ioeventfd(&proxy->bus); 289 } 290 291 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy) 292 { 293 virtio_bus_stop_ioeventfd(&proxy->bus); 294 } 295 296 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) 297 { 298 VirtIOPCIProxy *proxy = opaque; 299 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 300 hwaddr pa; 301 302 switch (addr) { 303 case VIRTIO_PCI_GUEST_FEATURES: 304 /* Guest does not negotiate properly? We have to assume nothing. */ 305 if (val & (1 << VIRTIO_F_BAD_FEATURE)) { 306 val = virtio_bus_get_vdev_bad_features(&proxy->bus); 307 } 308 virtio_set_features(vdev, val); 309 break; 310 case VIRTIO_PCI_QUEUE_PFN: 311 pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT; 312 if (pa == 0) { 313 virtio_pci_reset(DEVICE(proxy)); 314 } 315 else 316 virtio_queue_set_addr(vdev, vdev->queue_sel, pa); 317 break; 318 case VIRTIO_PCI_QUEUE_SEL: 319 if (val < VIRTIO_QUEUE_MAX) 320 vdev->queue_sel = val; 321 break; 322 case VIRTIO_PCI_QUEUE_NOTIFY: 323 if (val < VIRTIO_QUEUE_MAX) { 324 virtio_queue_notify(vdev, val); 325 } 326 break; 327 case VIRTIO_PCI_STATUS: 328 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) { 329 virtio_pci_stop_ioeventfd(proxy); 330 } 331 332 virtio_set_status(vdev, val & 0xFF); 333 334 if (val & VIRTIO_CONFIG_S_DRIVER_OK) { 335 virtio_pci_start_ioeventfd(proxy); 336 } 337 338 if (vdev->status == 0) { 339 virtio_pci_reset(DEVICE(proxy)); 340 } 341 342 /* Linux before 2.6.34 drives the device without enabling 343 the PCI device bus master bit. Enable it automatically 344 for the guest. This is a PCI spec violation but so is 345 initiating DMA with bus master bit clear. */ 346 if (val == (VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER)) { 347 pci_default_write_config(&proxy->pci_dev, PCI_COMMAND, 348 proxy->pci_dev.config[PCI_COMMAND] | 349 PCI_COMMAND_MASTER, 1); 350 } 351 break; 352 case VIRTIO_MSI_CONFIG_VECTOR: 353 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); 354 /* Make it possible for guest to discover an error took place. */ 355 if (msix_vector_use(&proxy->pci_dev, val) < 0) 356 val = VIRTIO_NO_VECTOR; 357 vdev->config_vector = val; 358 break; 359 case VIRTIO_MSI_QUEUE_VECTOR: 360 msix_vector_unuse(&proxy->pci_dev, 361 virtio_queue_vector(vdev, vdev->queue_sel)); 362 /* Make it possible for guest to discover an error took place. */ 363 if (msix_vector_use(&proxy->pci_dev, val) < 0) 364 val = VIRTIO_NO_VECTOR; 365 virtio_queue_set_vector(vdev, vdev->queue_sel, val); 366 break; 367 default: 368 error_report("%s: unexpected address 0x%x value 0x%x", 369 __func__, addr, val); 370 break; 371 } 372 } 373 374 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr) 375 { 376 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 377 uint32_t ret = 0xFFFFFFFF; 378 379 switch (addr) { 380 case VIRTIO_PCI_HOST_FEATURES: 381 ret = vdev->host_features; 382 break; 383 case VIRTIO_PCI_GUEST_FEATURES: 384 ret = vdev->guest_features; 385 break; 386 case VIRTIO_PCI_QUEUE_PFN: 387 ret = virtio_queue_get_addr(vdev, vdev->queue_sel) 388 >> VIRTIO_PCI_QUEUE_ADDR_SHIFT; 389 break; 390 case VIRTIO_PCI_QUEUE_NUM: 391 ret = virtio_queue_get_num(vdev, vdev->queue_sel); 392 break; 393 case VIRTIO_PCI_QUEUE_SEL: 394 ret = vdev->queue_sel; 395 break; 396 case VIRTIO_PCI_STATUS: 397 ret = vdev->status; 398 break; 399 case VIRTIO_PCI_ISR: 400 /* reading from the ISR also clears it. */ 401 ret = atomic_xchg(&vdev->isr, 0); 402 pci_irq_deassert(&proxy->pci_dev); 403 break; 404 case VIRTIO_MSI_CONFIG_VECTOR: 405 ret = vdev->config_vector; 406 break; 407 case VIRTIO_MSI_QUEUE_VECTOR: 408 ret = virtio_queue_vector(vdev, vdev->queue_sel); 409 break; 410 default: 411 break; 412 } 413 414 return ret; 415 } 416 417 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr, 418 unsigned size) 419 { 420 VirtIOPCIProxy *proxy = opaque; 421 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 422 uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev); 423 uint64_t val = 0; 424 if (addr < config) { 425 return virtio_ioport_read(proxy, addr); 426 } 427 addr -= config; 428 429 switch (size) { 430 case 1: 431 val = virtio_config_readb(vdev, addr); 432 break; 433 case 2: 434 val = virtio_config_readw(vdev, addr); 435 if (virtio_is_big_endian(vdev)) { 436 val = bswap16(val); 437 } 438 break; 439 case 4: 440 val = virtio_config_readl(vdev, addr); 441 if (virtio_is_big_endian(vdev)) { 442 val = bswap32(val); 443 } 444 break; 445 } 446 return val; 447 } 448 449 static void virtio_pci_config_write(void *opaque, hwaddr addr, 450 uint64_t val, unsigned size) 451 { 452 VirtIOPCIProxy *proxy = opaque; 453 uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev); 454 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 455 if (addr < config) { 456 virtio_ioport_write(proxy, addr, val); 457 return; 458 } 459 addr -= config; 460 /* 461 * Virtio-PCI is odd. Ioports are LE but config space is target native 462 * endian. 463 */ 464 switch (size) { 465 case 1: 466 virtio_config_writeb(vdev, addr, val); 467 break; 468 case 2: 469 if (virtio_is_big_endian(vdev)) { 470 val = bswap16(val); 471 } 472 virtio_config_writew(vdev, addr, val); 473 break; 474 case 4: 475 if (virtio_is_big_endian(vdev)) { 476 val = bswap32(val); 477 } 478 virtio_config_writel(vdev, addr, val); 479 break; 480 } 481 } 482 483 static const MemoryRegionOps virtio_pci_config_ops = { 484 .read = virtio_pci_config_read, 485 .write = virtio_pci_config_write, 486 .impl = { 487 .min_access_size = 1, 488 .max_access_size = 4, 489 }, 490 .endianness = DEVICE_LITTLE_ENDIAN, 491 }; 492 493 static MemoryRegion *virtio_address_space_lookup(VirtIOPCIProxy *proxy, 494 hwaddr *off, int len) 495 { 496 int i; 497 VirtIOPCIRegion *reg; 498 499 for (i = 0; i < ARRAY_SIZE(proxy->regs); ++i) { 500 reg = &proxy->regs[i]; 501 if (*off >= reg->offset && 502 *off + len <= reg->offset + reg->size) { 503 *off -= reg->offset; 504 return ®->mr; 505 } 506 } 507 508 return NULL; 509 } 510 511 /* Below are generic functions to do memcpy from/to an address space, 512 * without byteswaps, with input validation. 513 * 514 * As regular address_space_* APIs all do some kind of byteswap at least for 515 * some host/target combinations, we are forced to explicitly convert to a 516 * known-endianness integer value. 517 * It doesn't really matter which endian format to go through, so the code 518 * below selects the endian that causes the least amount of work on the given 519 * host. 520 * 521 * Note: host pointer must be aligned. 522 */ 523 static 524 void virtio_address_space_write(VirtIOPCIProxy *proxy, hwaddr addr, 525 const uint8_t *buf, int len) 526 { 527 uint64_t val; 528 MemoryRegion *mr; 529 530 /* address_space_* APIs assume an aligned address. 531 * As address is under guest control, handle illegal values. 532 */ 533 addr &= ~(len - 1); 534 535 mr = virtio_address_space_lookup(proxy, &addr, len); 536 if (!mr) { 537 return; 538 } 539 540 /* Make sure caller aligned buf properly */ 541 assert(!(((uintptr_t)buf) & (len - 1))); 542 543 switch (len) { 544 case 1: 545 val = pci_get_byte(buf); 546 break; 547 case 2: 548 val = cpu_to_le16(pci_get_word(buf)); 549 break; 550 case 4: 551 val = cpu_to_le32(pci_get_long(buf)); 552 break; 553 default: 554 /* As length is under guest control, handle illegal values. */ 555 return; 556 } 557 memory_region_dispatch_write(mr, addr, val, len, MEMTXATTRS_UNSPECIFIED); 558 } 559 560 static void 561 virtio_address_space_read(VirtIOPCIProxy *proxy, hwaddr addr, 562 uint8_t *buf, int len) 563 { 564 uint64_t val; 565 MemoryRegion *mr; 566 567 /* address_space_* APIs assume an aligned address. 568 * As address is under guest control, handle illegal values. 569 */ 570 addr &= ~(len - 1); 571 572 mr = virtio_address_space_lookup(proxy, &addr, len); 573 if (!mr) { 574 return; 575 } 576 577 /* Make sure caller aligned buf properly */ 578 assert(!(((uintptr_t)buf) & (len - 1))); 579 580 memory_region_dispatch_read(mr, addr, &val, len, MEMTXATTRS_UNSPECIFIED); 581 switch (len) { 582 case 1: 583 pci_set_byte(buf, val); 584 break; 585 case 2: 586 pci_set_word(buf, le16_to_cpu(val)); 587 break; 588 case 4: 589 pci_set_long(buf, le32_to_cpu(val)); 590 break; 591 default: 592 /* As length is under guest control, handle illegal values. */ 593 break; 594 } 595 } 596 597 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, 598 uint32_t val, int len) 599 { 600 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); 601 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 602 struct virtio_pci_cfg_cap *cfg; 603 604 pci_default_write_config(pci_dev, address, val, len); 605 606 if (range_covers_byte(address, len, PCI_COMMAND) && 607 !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { 608 virtio_pci_stop_ioeventfd(proxy); 609 virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); 610 } 611 612 if (proxy->config_cap && 613 ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap, 614 pci_cfg_data), 615 sizeof cfg->pci_cfg_data)) { 616 uint32_t off; 617 uint32_t len; 618 619 cfg = (void *)(proxy->pci_dev.config + proxy->config_cap); 620 off = le32_to_cpu(cfg->cap.offset); 621 len = le32_to_cpu(cfg->cap.length); 622 623 if (len == 1 || len == 2 || len == 4) { 624 assert(len <= sizeof cfg->pci_cfg_data); 625 virtio_address_space_write(proxy, off, cfg->pci_cfg_data, len); 626 } 627 } 628 } 629 630 static uint32_t virtio_read_config(PCIDevice *pci_dev, 631 uint32_t address, int len) 632 { 633 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); 634 struct virtio_pci_cfg_cap *cfg; 635 636 if (proxy->config_cap && 637 ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap, 638 pci_cfg_data), 639 sizeof cfg->pci_cfg_data)) { 640 uint32_t off; 641 uint32_t len; 642 643 cfg = (void *)(proxy->pci_dev.config + proxy->config_cap); 644 off = le32_to_cpu(cfg->cap.offset); 645 len = le32_to_cpu(cfg->cap.length); 646 647 if (len == 1 || len == 2 || len == 4) { 648 assert(len <= sizeof cfg->pci_cfg_data); 649 virtio_address_space_read(proxy, off, cfg->pci_cfg_data, len); 650 } 651 } 652 653 return pci_default_read_config(pci_dev, address, len); 654 } 655 656 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, 657 unsigned int queue_no, 658 unsigned int vector) 659 { 660 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 661 int ret; 662 663 if (irqfd->users == 0) { 664 ret = kvm_irqchip_add_msi_route(kvm_state, vector, &proxy->pci_dev); 665 if (ret < 0) { 666 return ret; 667 } 668 irqfd->virq = ret; 669 } 670 irqfd->users++; 671 return 0; 672 } 673 674 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, 675 unsigned int vector) 676 { 677 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 678 if (--irqfd->users == 0) { 679 kvm_irqchip_release_virq(kvm_state, irqfd->virq); 680 } 681 } 682 683 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy, 684 unsigned int queue_no, 685 unsigned int vector) 686 { 687 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 688 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 689 VirtQueue *vq = virtio_get_queue(vdev, queue_no); 690 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 691 return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, NULL, irqfd->virq); 692 } 693 694 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy, 695 unsigned int queue_no, 696 unsigned int vector) 697 { 698 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 699 VirtQueue *vq = virtio_get_queue(vdev, queue_no); 700 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 701 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; 702 int ret; 703 704 ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, n, irqfd->virq); 705 assert(ret == 0); 706 } 707 708 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs) 709 { 710 PCIDevice *dev = &proxy->pci_dev; 711 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 712 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 713 unsigned int vector; 714 int ret, queue_no; 715 716 for (queue_no = 0; queue_no < nvqs; queue_no++) { 717 if (!virtio_queue_get_num(vdev, queue_no)) { 718 break; 719 } 720 vector = virtio_queue_vector(vdev, queue_no); 721 if (vector >= msix_nr_vectors_allocated(dev)) { 722 continue; 723 } 724 ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector); 725 if (ret < 0) { 726 goto undo; 727 } 728 /* If guest supports masking, set up irqfd now. 729 * Otherwise, delay until unmasked in the frontend. 730 */ 731 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { 732 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); 733 if (ret < 0) { 734 kvm_virtio_pci_vq_vector_release(proxy, vector); 735 goto undo; 736 } 737 } 738 } 739 return 0; 740 741 undo: 742 while (--queue_no >= 0) { 743 vector = virtio_queue_vector(vdev, queue_no); 744 if (vector >= msix_nr_vectors_allocated(dev)) { 745 continue; 746 } 747 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { 748 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 749 } 750 kvm_virtio_pci_vq_vector_release(proxy, vector); 751 } 752 return ret; 753 } 754 755 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs) 756 { 757 PCIDevice *dev = &proxy->pci_dev; 758 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 759 unsigned int vector; 760 int queue_no; 761 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 762 763 for (queue_no = 0; queue_no < nvqs; queue_no++) { 764 if (!virtio_queue_get_num(vdev, queue_no)) { 765 break; 766 } 767 vector = virtio_queue_vector(vdev, queue_no); 768 if (vector >= msix_nr_vectors_allocated(dev)) { 769 continue; 770 } 771 /* If guest supports masking, clean up irqfd now. 772 * Otherwise, it was cleaned when masked in the frontend. 773 */ 774 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { 775 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 776 } 777 kvm_virtio_pci_vq_vector_release(proxy, vector); 778 } 779 } 780 781 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy, 782 unsigned int queue_no, 783 unsigned int vector, 784 MSIMessage msg) 785 { 786 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 787 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 788 VirtQueue *vq = virtio_get_queue(vdev, queue_no); 789 EventNotifier *n = virtio_queue_get_guest_notifier(vq); 790 VirtIOIRQFD *irqfd; 791 int ret = 0; 792 793 if (proxy->vector_irqfd) { 794 irqfd = &proxy->vector_irqfd[vector]; 795 if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) { 796 ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg, 797 &proxy->pci_dev); 798 if (ret < 0) { 799 return ret; 800 } 801 kvm_irqchip_commit_routes(kvm_state); 802 } 803 } 804 805 /* If guest supports masking, irqfd is already setup, unmask it. 806 * Otherwise, set it up now. 807 */ 808 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { 809 k->guest_notifier_mask(vdev, queue_no, false); 810 /* Test after unmasking to avoid losing events. */ 811 if (k->guest_notifier_pending && 812 k->guest_notifier_pending(vdev, queue_no)) { 813 event_notifier_set(n); 814 } 815 } else { 816 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); 817 } 818 return ret; 819 } 820 821 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy, 822 unsigned int queue_no, 823 unsigned int vector) 824 { 825 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 826 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 827 828 /* If guest supports masking, keep irqfd but mask it. 829 * Otherwise, clean it up now. 830 */ 831 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { 832 k->guest_notifier_mask(vdev, queue_no, true); 833 } else { 834 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); 835 } 836 } 837 838 static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector, 839 MSIMessage msg) 840 { 841 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 842 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 843 VirtQueue *vq = virtio_vector_first_queue(vdev, vector); 844 int ret, index, unmasked = 0; 845 846 while (vq) { 847 index = virtio_get_queue_index(vq); 848 if (!virtio_queue_get_num(vdev, index)) { 849 break; 850 } 851 if (index < proxy->nvqs_with_notifiers) { 852 ret = virtio_pci_vq_vector_unmask(proxy, index, vector, msg); 853 if (ret < 0) { 854 goto undo; 855 } 856 ++unmasked; 857 } 858 vq = virtio_vector_next_queue(vq); 859 } 860 861 return 0; 862 863 undo: 864 vq = virtio_vector_first_queue(vdev, vector); 865 while (vq && unmasked >= 0) { 866 index = virtio_get_queue_index(vq); 867 if (index < proxy->nvqs_with_notifiers) { 868 virtio_pci_vq_vector_mask(proxy, index, vector); 869 --unmasked; 870 } 871 vq = virtio_vector_next_queue(vq); 872 } 873 return ret; 874 } 875 876 static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector) 877 { 878 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 879 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 880 VirtQueue *vq = virtio_vector_first_queue(vdev, vector); 881 int index; 882 883 while (vq) { 884 index = virtio_get_queue_index(vq); 885 if (!virtio_queue_get_num(vdev, index)) { 886 break; 887 } 888 if (index < proxy->nvqs_with_notifiers) { 889 virtio_pci_vq_vector_mask(proxy, index, vector); 890 } 891 vq = virtio_vector_next_queue(vq); 892 } 893 } 894 895 static void virtio_pci_vector_poll(PCIDevice *dev, 896 unsigned int vector_start, 897 unsigned int vector_end) 898 { 899 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); 900 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 901 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 902 int queue_no; 903 unsigned int vector; 904 EventNotifier *notifier; 905 VirtQueue *vq; 906 907 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { 908 if (!virtio_queue_get_num(vdev, queue_no)) { 909 break; 910 } 911 vector = virtio_queue_vector(vdev, queue_no); 912 if (vector < vector_start || vector >= vector_end || 913 !msix_is_masked(dev, vector)) { 914 continue; 915 } 916 vq = virtio_get_queue(vdev, queue_no); 917 notifier = virtio_queue_get_guest_notifier(vq); 918 if (k->guest_notifier_pending) { 919 if (k->guest_notifier_pending(vdev, queue_no)) { 920 msix_set_pending(dev, vector); 921 } 922 } else if (event_notifier_test_and_clear(notifier)) { 923 msix_set_pending(dev, vector); 924 } 925 } 926 } 927 928 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign, 929 bool with_irqfd) 930 { 931 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 932 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 933 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev); 934 VirtQueue *vq = virtio_get_queue(vdev, n); 935 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 936 937 if (assign) { 938 int r = event_notifier_init(notifier, 0); 939 if (r < 0) { 940 return r; 941 } 942 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); 943 } else { 944 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); 945 event_notifier_cleanup(notifier); 946 } 947 948 if (!msix_enabled(&proxy->pci_dev) && 949 vdev->use_guest_notifier_mask && 950 vdc->guest_notifier_mask) { 951 vdc->guest_notifier_mask(vdev, n, !assign); 952 } 953 954 return 0; 955 } 956 957 static bool virtio_pci_query_guest_notifiers(DeviceState *d) 958 { 959 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 960 return msix_enabled(&proxy->pci_dev); 961 } 962 963 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign) 964 { 965 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 966 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 967 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 968 int r, n; 969 bool with_irqfd = msix_enabled(&proxy->pci_dev) && 970 kvm_msi_via_irqfd_enabled(); 971 972 nvqs = MIN(nvqs, VIRTIO_QUEUE_MAX); 973 974 /* When deassigning, pass a consistent nvqs value 975 * to avoid leaking notifiers. 976 */ 977 assert(assign || nvqs == proxy->nvqs_with_notifiers); 978 979 proxy->nvqs_with_notifiers = nvqs; 980 981 /* Must unset vector notifier while guest notifier is still assigned */ 982 if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) { 983 msix_unset_vector_notifiers(&proxy->pci_dev); 984 if (proxy->vector_irqfd) { 985 kvm_virtio_pci_vector_release(proxy, nvqs); 986 g_free(proxy->vector_irqfd); 987 proxy->vector_irqfd = NULL; 988 } 989 } 990 991 for (n = 0; n < nvqs; n++) { 992 if (!virtio_queue_get_num(vdev, n)) { 993 break; 994 } 995 996 r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd); 997 if (r < 0) { 998 goto assign_error; 999 } 1000 } 1001 1002 /* Must set vector notifier after guest notifier has been assigned */ 1003 if ((with_irqfd || k->guest_notifier_mask) && assign) { 1004 if (with_irqfd) { 1005 proxy->vector_irqfd = 1006 g_malloc0(sizeof(*proxy->vector_irqfd) * 1007 msix_nr_vectors_allocated(&proxy->pci_dev)); 1008 r = kvm_virtio_pci_vector_use(proxy, nvqs); 1009 if (r < 0) { 1010 goto assign_error; 1011 } 1012 } 1013 r = msix_set_vector_notifiers(&proxy->pci_dev, 1014 virtio_pci_vector_unmask, 1015 virtio_pci_vector_mask, 1016 virtio_pci_vector_poll); 1017 if (r < 0) { 1018 goto notifiers_error; 1019 } 1020 } 1021 1022 return 0; 1023 1024 notifiers_error: 1025 if (with_irqfd) { 1026 assert(assign); 1027 kvm_virtio_pci_vector_release(proxy, nvqs); 1028 } 1029 1030 assign_error: 1031 /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */ 1032 assert(assign); 1033 while (--n >= 0) { 1034 virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd); 1035 } 1036 return r; 1037 } 1038 1039 static int virtio_pci_set_host_notifier_mr(DeviceState *d, int n, 1040 MemoryRegion *mr, bool assign) 1041 { 1042 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 1043 int offset; 1044 1045 if (n >= VIRTIO_QUEUE_MAX || !virtio_pci_modern(proxy) || 1046 virtio_pci_queue_mem_mult(proxy) != memory_region_size(mr)) { 1047 return -1; 1048 } 1049 1050 if (assign) { 1051 offset = virtio_pci_queue_mem_mult(proxy) * n; 1052 memory_region_add_subregion_overlap(&proxy->notify.mr, offset, mr, 1); 1053 } else { 1054 memory_region_del_subregion(&proxy->notify.mr, mr); 1055 } 1056 1057 return 0; 1058 } 1059 1060 static void virtio_pci_vmstate_change(DeviceState *d, bool running) 1061 { 1062 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 1063 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 1064 1065 if (running) { 1066 /* Old QEMU versions did not set bus master enable on status write. 1067 * Detect DRIVER set and enable it. 1068 */ 1069 if ((proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION) && 1070 (vdev->status & VIRTIO_CONFIG_S_DRIVER) && 1071 !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { 1072 pci_default_write_config(&proxy->pci_dev, PCI_COMMAND, 1073 proxy->pci_dev.config[PCI_COMMAND] | 1074 PCI_COMMAND_MASTER, 1); 1075 } 1076 virtio_pci_start_ioeventfd(proxy); 1077 } else { 1078 virtio_pci_stop_ioeventfd(proxy); 1079 } 1080 } 1081 1082 #ifdef CONFIG_VIRTFS 1083 static void virtio_9p_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 1084 { 1085 V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev); 1086 DeviceState *vdev = DEVICE(&dev->vdev); 1087 1088 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1089 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 1090 } 1091 1092 static Property virtio_9p_pci_properties[] = { 1093 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1094 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1095 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 1096 DEFINE_PROP_END_OF_LIST(), 1097 }; 1098 1099 static void virtio_9p_pci_class_init(ObjectClass *klass, void *data) 1100 { 1101 DeviceClass *dc = DEVICE_CLASS(klass); 1102 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1103 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1104 1105 k->realize = virtio_9p_pci_realize; 1106 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1107 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P; 1108 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1109 pcidev_k->class_id = 0x2; 1110 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1111 dc->props = virtio_9p_pci_properties; 1112 } 1113 1114 static void virtio_9p_pci_instance_init(Object *obj) 1115 { 1116 V9fsPCIState *dev = VIRTIO_9P_PCI(obj); 1117 1118 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 1119 TYPE_VIRTIO_9P); 1120 } 1121 1122 static const TypeInfo virtio_9p_pci_info = { 1123 .name = TYPE_VIRTIO_9P_PCI, 1124 .parent = TYPE_VIRTIO_PCI, 1125 .instance_size = sizeof(V9fsPCIState), 1126 .instance_init = virtio_9p_pci_instance_init, 1127 .class_init = virtio_9p_pci_class_init, 1128 }; 1129 #endif /* CONFIG_VIRTFS */ 1130 1131 /* 1132 * virtio-pci: This is the PCIDevice which has a virtio-pci-bus. 1133 */ 1134 1135 static int virtio_pci_query_nvectors(DeviceState *d) 1136 { 1137 VirtIOPCIProxy *proxy = VIRTIO_PCI(d); 1138 1139 return proxy->nvectors; 1140 } 1141 1142 static AddressSpace *virtio_pci_get_dma_as(DeviceState *d) 1143 { 1144 VirtIOPCIProxy *proxy = VIRTIO_PCI(d); 1145 PCIDevice *dev = &proxy->pci_dev; 1146 1147 return pci_get_address_space(dev); 1148 } 1149 1150 static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy, 1151 struct virtio_pci_cap *cap) 1152 { 1153 PCIDevice *dev = &proxy->pci_dev; 1154 int offset; 1155 1156 offset = pci_add_capability(dev, PCI_CAP_ID_VNDR, 0, 1157 cap->cap_len, &error_abort); 1158 1159 assert(cap->cap_len >= sizeof *cap); 1160 memcpy(dev->config + offset + PCI_CAP_FLAGS, &cap->cap_len, 1161 cap->cap_len - PCI_CAP_FLAGS); 1162 1163 return offset; 1164 } 1165 1166 static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr, 1167 unsigned size) 1168 { 1169 VirtIOPCIProxy *proxy = opaque; 1170 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 1171 uint32_t val = 0; 1172 int i; 1173 1174 switch (addr) { 1175 case VIRTIO_PCI_COMMON_DFSELECT: 1176 val = proxy->dfselect; 1177 break; 1178 case VIRTIO_PCI_COMMON_DF: 1179 if (proxy->dfselect <= 1) { 1180 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev); 1181 1182 val = (vdev->host_features & ~vdc->legacy_features) >> 1183 (32 * proxy->dfselect); 1184 } 1185 break; 1186 case VIRTIO_PCI_COMMON_GFSELECT: 1187 val = proxy->gfselect; 1188 break; 1189 case VIRTIO_PCI_COMMON_GF: 1190 if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) { 1191 val = proxy->guest_features[proxy->gfselect]; 1192 } 1193 break; 1194 case VIRTIO_PCI_COMMON_MSIX: 1195 val = vdev->config_vector; 1196 break; 1197 case VIRTIO_PCI_COMMON_NUMQ: 1198 for (i = 0; i < VIRTIO_QUEUE_MAX; ++i) { 1199 if (virtio_queue_get_num(vdev, i)) { 1200 val = i + 1; 1201 } 1202 } 1203 break; 1204 case VIRTIO_PCI_COMMON_STATUS: 1205 val = vdev->status; 1206 break; 1207 case VIRTIO_PCI_COMMON_CFGGENERATION: 1208 val = vdev->generation; 1209 break; 1210 case VIRTIO_PCI_COMMON_Q_SELECT: 1211 val = vdev->queue_sel; 1212 break; 1213 case VIRTIO_PCI_COMMON_Q_SIZE: 1214 val = virtio_queue_get_num(vdev, vdev->queue_sel); 1215 break; 1216 case VIRTIO_PCI_COMMON_Q_MSIX: 1217 val = virtio_queue_vector(vdev, vdev->queue_sel); 1218 break; 1219 case VIRTIO_PCI_COMMON_Q_ENABLE: 1220 val = proxy->vqs[vdev->queue_sel].enabled; 1221 break; 1222 case VIRTIO_PCI_COMMON_Q_NOFF: 1223 /* Simply map queues in order */ 1224 val = vdev->queue_sel; 1225 break; 1226 case VIRTIO_PCI_COMMON_Q_DESCLO: 1227 val = proxy->vqs[vdev->queue_sel].desc[0]; 1228 break; 1229 case VIRTIO_PCI_COMMON_Q_DESCHI: 1230 val = proxy->vqs[vdev->queue_sel].desc[1]; 1231 break; 1232 case VIRTIO_PCI_COMMON_Q_AVAILLO: 1233 val = proxy->vqs[vdev->queue_sel].avail[0]; 1234 break; 1235 case VIRTIO_PCI_COMMON_Q_AVAILHI: 1236 val = proxy->vqs[vdev->queue_sel].avail[1]; 1237 break; 1238 case VIRTIO_PCI_COMMON_Q_USEDLO: 1239 val = proxy->vqs[vdev->queue_sel].used[0]; 1240 break; 1241 case VIRTIO_PCI_COMMON_Q_USEDHI: 1242 val = proxy->vqs[vdev->queue_sel].used[1]; 1243 break; 1244 default: 1245 val = 0; 1246 } 1247 1248 return val; 1249 } 1250 1251 static void virtio_pci_common_write(void *opaque, hwaddr addr, 1252 uint64_t val, unsigned size) 1253 { 1254 VirtIOPCIProxy *proxy = opaque; 1255 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 1256 1257 switch (addr) { 1258 case VIRTIO_PCI_COMMON_DFSELECT: 1259 proxy->dfselect = val; 1260 break; 1261 case VIRTIO_PCI_COMMON_GFSELECT: 1262 proxy->gfselect = val; 1263 break; 1264 case VIRTIO_PCI_COMMON_GF: 1265 if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) { 1266 proxy->guest_features[proxy->gfselect] = val; 1267 virtio_set_features(vdev, 1268 (((uint64_t)proxy->guest_features[1]) << 32) | 1269 proxy->guest_features[0]); 1270 } 1271 break; 1272 case VIRTIO_PCI_COMMON_MSIX: 1273 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); 1274 /* Make it possible for guest to discover an error took place. */ 1275 if (msix_vector_use(&proxy->pci_dev, val) < 0) { 1276 val = VIRTIO_NO_VECTOR; 1277 } 1278 vdev->config_vector = val; 1279 break; 1280 case VIRTIO_PCI_COMMON_STATUS: 1281 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) { 1282 virtio_pci_stop_ioeventfd(proxy); 1283 } 1284 1285 virtio_set_status(vdev, val & 0xFF); 1286 1287 if (val & VIRTIO_CONFIG_S_DRIVER_OK) { 1288 virtio_pci_start_ioeventfd(proxy); 1289 } 1290 1291 if (vdev->status == 0) { 1292 virtio_pci_reset(DEVICE(proxy)); 1293 } 1294 1295 break; 1296 case VIRTIO_PCI_COMMON_Q_SELECT: 1297 if (val < VIRTIO_QUEUE_MAX) { 1298 vdev->queue_sel = val; 1299 } 1300 break; 1301 case VIRTIO_PCI_COMMON_Q_SIZE: 1302 proxy->vqs[vdev->queue_sel].num = val; 1303 break; 1304 case VIRTIO_PCI_COMMON_Q_MSIX: 1305 msix_vector_unuse(&proxy->pci_dev, 1306 virtio_queue_vector(vdev, vdev->queue_sel)); 1307 /* Make it possible for guest to discover an error took place. */ 1308 if (msix_vector_use(&proxy->pci_dev, val) < 0) { 1309 val = VIRTIO_NO_VECTOR; 1310 } 1311 virtio_queue_set_vector(vdev, vdev->queue_sel, val); 1312 break; 1313 case VIRTIO_PCI_COMMON_Q_ENABLE: 1314 virtio_queue_set_num(vdev, vdev->queue_sel, 1315 proxy->vqs[vdev->queue_sel].num); 1316 virtio_queue_set_rings(vdev, vdev->queue_sel, 1317 ((uint64_t)proxy->vqs[vdev->queue_sel].desc[1]) << 32 | 1318 proxy->vqs[vdev->queue_sel].desc[0], 1319 ((uint64_t)proxy->vqs[vdev->queue_sel].avail[1]) << 32 | 1320 proxy->vqs[vdev->queue_sel].avail[0], 1321 ((uint64_t)proxy->vqs[vdev->queue_sel].used[1]) << 32 | 1322 proxy->vqs[vdev->queue_sel].used[0]); 1323 proxy->vqs[vdev->queue_sel].enabled = 1; 1324 break; 1325 case VIRTIO_PCI_COMMON_Q_DESCLO: 1326 proxy->vqs[vdev->queue_sel].desc[0] = val; 1327 break; 1328 case VIRTIO_PCI_COMMON_Q_DESCHI: 1329 proxy->vqs[vdev->queue_sel].desc[1] = val; 1330 break; 1331 case VIRTIO_PCI_COMMON_Q_AVAILLO: 1332 proxy->vqs[vdev->queue_sel].avail[0] = val; 1333 break; 1334 case VIRTIO_PCI_COMMON_Q_AVAILHI: 1335 proxy->vqs[vdev->queue_sel].avail[1] = val; 1336 break; 1337 case VIRTIO_PCI_COMMON_Q_USEDLO: 1338 proxy->vqs[vdev->queue_sel].used[0] = val; 1339 break; 1340 case VIRTIO_PCI_COMMON_Q_USEDHI: 1341 proxy->vqs[vdev->queue_sel].used[1] = val; 1342 break; 1343 default: 1344 break; 1345 } 1346 } 1347 1348 1349 static uint64_t virtio_pci_notify_read(void *opaque, hwaddr addr, 1350 unsigned size) 1351 { 1352 return 0; 1353 } 1354 1355 static void virtio_pci_notify_write(void *opaque, hwaddr addr, 1356 uint64_t val, unsigned size) 1357 { 1358 VirtIODevice *vdev = opaque; 1359 VirtIOPCIProxy *proxy = VIRTIO_PCI(DEVICE(vdev)->parent_bus->parent); 1360 unsigned queue = addr / virtio_pci_queue_mem_mult(proxy); 1361 1362 if (queue < VIRTIO_QUEUE_MAX) { 1363 virtio_queue_notify(vdev, queue); 1364 } 1365 } 1366 1367 static void virtio_pci_notify_write_pio(void *opaque, hwaddr addr, 1368 uint64_t val, unsigned size) 1369 { 1370 VirtIODevice *vdev = opaque; 1371 unsigned queue = val; 1372 1373 if (queue < VIRTIO_QUEUE_MAX) { 1374 virtio_queue_notify(vdev, queue); 1375 } 1376 } 1377 1378 static uint64_t virtio_pci_isr_read(void *opaque, hwaddr addr, 1379 unsigned size) 1380 { 1381 VirtIOPCIProxy *proxy = opaque; 1382 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 1383 uint64_t val = atomic_xchg(&vdev->isr, 0); 1384 pci_irq_deassert(&proxy->pci_dev); 1385 1386 return val; 1387 } 1388 1389 static void virtio_pci_isr_write(void *opaque, hwaddr addr, 1390 uint64_t val, unsigned size) 1391 { 1392 } 1393 1394 static uint64_t virtio_pci_device_read(void *opaque, hwaddr addr, 1395 unsigned size) 1396 { 1397 VirtIODevice *vdev = opaque; 1398 uint64_t val = 0; 1399 1400 switch (size) { 1401 case 1: 1402 val = virtio_config_modern_readb(vdev, addr); 1403 break; 1404 case 2: 1405 val = virtio_config_modern_readw(vdev, addr); 1406 break; 1407 case 4: 1408 val = virtio_config_modern_readl(vdev, addr); 1409 break; 1410 } 1411 return val; 1412 } 1413 1414 static void virtio_pci_device_write(void *opaque, hwaddr addr, 1415 uint64_t val, unsigned size) 1416 { 1417 VirtIODevice *vdev = opaque; 1418 switch (size) { 1419 case 1: 1420 virtio_config_modern_writeb(vdev, addr, val); 1421 break; 1422 case 2: 1423 virtio_config_modern_writew(vdev, addr, val); 1424 break; 1425 case 4: 1426 virtio_config_modern_writel(vdev, addr, val); 1427 break; 1428 } 1429 } 1430 1431 static void virtio_pci_modern_regions_init(VirtIOPCIProxy *proxy) 1432 { 1433 static const MemoryRegionOps common_ops = { 1434 .read = virtio_pci_common_read, 1435 .write = virtio_pci_common_write, 1436 .impl = { 1437 .min_access_size = 1, 1438 .max_access_size = 4, 1439 }, 1440 .endianness = DEVICE_LITTLE_ENDIAN, 1441 }; 1442 static const MemoryRegionOps isr_ops = { 1443 .read = virtio_pci_isr_read, 1444 .write = virtio_pci_isr_write, 1445 .impl = { 1446 .min_access_size = 1, 1447 .max_access_size = 4, 1448 }, 1449 .endianness = DEVICE_LITTLE_ENDIAN, 1450 }; 1451 static const MemoryRegionOps device_ops = { 1452 .read = virtio_pci_device_read, 1453 .write = virtio_pci_device_write, 1454 .impl = { 1455 .min_access_size = 1, 1456 .max_access_size = 4, 1457 }, 1458 .endianness = DEVICE_LITTLE_ENDIAN, 1459 }; 1460 static const MemoryRegionOps notify_ops = { 1461 .read = virtio_pci_notify_read, 1462 .write = virtio_pci_notify_write, 1463 .impl = { 1464 .min_access_size = 1, 1465 .max_access_size = 4, 1466 }, 1467 .endianness = DEVICE_LITTLE_ENDIAN, 1468 }; 1469 static const MemoryRegionOps notify_pio_ops = { 1470 .read = virtio_pci_notify_read, 1471 .write = virtio_pci_notify_write_pio, 1472 .impl = { 1473 .min_access_size = 1, 1474 .max_access_size = 4, 1475 }, 1476 .endianness = DEVICE_LITTLE_ENDIAN, 1477 }; 1478 1479 1480 memory_region_init_io(&proxy->common.mr, OBJECT(proxy), 1481 &common_ops, 1482 proxy, 1483 "virtio-pci-common", 1484 proxy->common.size); 1485 1486 memory_region_init_io(&proxy->isr.mr, OBJECT(proxy), 1487 &isr_ops, 1488 proxy, 1489 "virtio-pci-isr", 1490 proxy->isr.size); 1491 1492 memory_region_init_io(&proxy->device.mr, OBJECT(proxy), 1493 &device_ops, 1494 virtio_bus_get_device(&proxy->bus), 1495 "virtio-pci-device", 1496 proxy->device.size); 1497 1498 memory_region_init_io(&proxy->notify.mr, OBJECT(proxy), 1499 ¬ify_ops, 1500 virtio_bus_get_device(&proxy->bus), 1501 "virtio-pci-notify", 1502 proxy->notify.size); 1503 1504 memory_region_init_io(&proxy->notify_pio.mr, OBJECT(proxy), 1505 ¬ify_pio_ops, 1506 virtio_bus_get_device(&proxy->bus), 1507 "virtio-pci-notify-pio", 1508 proxy->notify_pio.size); 1509 } 1510 1511 static void virtio_pci_modern_region_map(VirtIOPCIProxy *proxy, 1512 VirtIOPCIRegion *region, 1513 struct virtio_pci_cap *cap, 1514 MemoryRegion *mr, 1515 uint8_t bar) 1516 { 1517 memory_region_add_subregion(mr, region->offset, ®ion->mr); 1518 1519 cap->cfg_type = region->type; 1520 cap->bar = bar; 1521 cap->offset = cpu_to_le32(region->offset); 1522 cap->length = cpu_to_le32(region->size); 1523 virtio_pci_add_mem_cap(proxy, cap); 1524 1525 } 1526 1527 static void virtio_pci_modern_mem_region_map(VirtIOPCIProxy *proxy, 1528 VirtIOPCIRegion *region, 1529 struct virtio_pci_cap *cap) 1530 { 1531 virtio_pci_modern_region_map(proxy, region, cap, 1532 &proxy->modern_bar, proxy->modern_mem_bar_idx); 1533 } 1534 1535 static void virtio_pci_modern_io_region_map(VirtIOPCIProxy *proxy, 1536 VirtIOPCIRegion *region, 1537 struct virtio_pci_cap *cap) 1538 { 1539 virtio_pci_modern_region_map(proxy, region, cap, 1540 &proxy->io_bar, proxy->modern_io_bar_idx); 1541 } 1542 1543 static void virtio_pci_modern_mem_region_unmap(VirtIOPCIProxy *proxy, 1544 VirtIOPCIRegion *region) 1545 { 1546 memory_region_del_subregion(&proxy->modern_bar, 1547 ®ion->mr); 1548 } 1549 1550 static void virtio_pci_modern_io_region_unmap(VirtIOPCIProxy *proxy, 1551 VirtIOPCIRegion *region) 1552 { 1553 memory_region_del_subregion(&proxy->io_bar, 1554 ®ion->mr); 1555 } 1556 1557 static void virtio_pci_pre_plugged(DeviceState *d, Error **errp) 1558 { 1559 VirtIOPCIProxy *proxy = VIRTIO_PCI(d); 1560 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 1561 1562 if (virtio_pci_modern(proxy)) { 1563 virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1); 1564 } 1565 1566 virtio_add_feature(&vdev->host_features, VIRTIO_F_BAD_FEATURE); 1567 } 1568 1569 /* This is called by virtio-bus just after the device is plugged. */ 1570 static void virtio_pci_device_plugged(DeviceState *d, Error **errp) 1571 { 1572 VirtIOPCIProxy *proxy = VIRTIO_PCI(d); 1573 VirtioBusState *bus = &proxy->bus; 1574 bool legacy = virtio_pci_legacy(proxy); 1575 bool modern; 1576 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY; 1577 uint8_t *config; 1578 uint32_t size; 1579 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); 1580 1581 /* 1582 * Virtio capabilities present without 1583 * VIRTIO_F_VERSION_1 confuses guests 1584 */ 1585 if (!proxy->ignore_backend_features && 1586 !virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) { 1587 virtio_pci_disable_modern(proxy); 1588 1589 if (!legacy) { 1590 error_setg(errp, "Device doesn't support modern mode, and legacy" 1591 " mode is disabled"); 1592 error_append_hint(errp, "Set disable-legacy to off\n"); 1593 1594 return; 1595 } 1596 } 1597 1598 modern = virtio_pci_modern(proxy); 1599 1600 config = proxy->pci_dev.config; 1601 if (proxy->class_code) { 1602 pci_config_set_class(config, proxy->class_code); 1603 } 1604 1605 if (legacy) { 1606 if (virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM)) { 1607 error_setg(errp, "VIRTIO_F_IOMMU_PLATFORM was supported by" 1608 " neither legacy nor transitional device"); 1609 return ; 1610 } 1611 /* 1612 * Legacy and transitional devices use specific subsystem IDs. 1613 * Note that the subsystem vendor ID (config + PCI_SUBSYSTEM_VENDOR_ID) 1614 * is set to PCI_SUBVENDOR_ID_REDHAT_QUMRANET by default. 1615 */ 1616 pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus)); 1617 } else { 1618 /* pure virtio-1.0 */ 1619 pci_set_word(config + PCI_VENDOR_ID, 1620 PCI_VENDOR_ID_REDHAT_QUMRANET); 1621 pci_set_word(config + PCI_DEVICE_ID, 1622 0x1040 + virtio_bus_get_vdev_id(bus)); 1623 pci_config_set_revision(config, 1); 1624 } 1625 config[PCI_INTERRUPT_PIN] = 1; 1626 1627 1628 if (modern) { 1629 struct virtio_pci_cap cap = { 1630 .cap_len = sizeof cap, 1631 }; 1632 struct virtio_pci_notify_cap notify = { 1633 .cap.cap_len = sizeof notify, 1634 .notify_off_multiplier = 1635 cpu_to_le32(virtio_pci_queue_mem_mult(proxy)), 1636 }; 1637 struct virtio_pci_cfg_cap cfg = { 1638 .cap.cap_len = sizeof cfg, 1639 .cap.cfg_type = VIRTIO_PCI_CAP_PCI_CFG, 1640 }; 1641 struct virtio_pci_notify_cap notify_pio = { 1642 .cap.cap_len = sizeof notify, 1643 .notify_off_multiplier = cpu_to_le32(0x0), 1644 }; 1645 1646 struct virtio_pci_cfg_cap *cfg_mask; 1647 1648 virtio_pci_modern_regions_init(proxy); 1649 1650 virtio_pci_modern_mem_region_map(proxy, &proxy->common, &cap); 1651 virtio_pci_modern_mem_region_map(proxy, &proxy->isr, &cap); 1652 virtio_pci_modern_mem_region_map(proxy, &proxy->device, &cap); 1653 virtio_pci_modern_mem_region_map(proxy, &proxy->notify, ¬ify.cap); 1654 1655 if (modern_pio) { 1656 memory_region_init(&proxy->io_bar, OBJECT(proxy), 1657 "virtio-pci-io", 0x4); 1658 1659 pci_register_bar(&proxy->pci_dev, proxy->modern_io_bar_idx, 1660 PCI_BASE_ADDRESS_SPACE_IO, &proxy->io_bar); 1661 1662 virtio_pci_modern_io_region_map(proxy, &proxy->notify_pio, 1663 ¬ify_pio.cap); 1664 } 1665 1666 pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar_idx, 1667 PCI_BASE_ADDRESS_SPACE_MEMORY | 1668 PCI_BASE_ADDRESS_MEM_PREFETCH | 1669 PCI_BASE_ADDRESS_MEM_TYPE_64, 1670 &proxy->modern_bar); 1671 1672 proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap); 1673 cfg_mask = (void *)(proxy->pci_dev.wmask + proxy->config_cap); 1674 pci_set_byte(&cfg_mask->cap.bar, ~0x0); 1675 pci_set_long((uint8_t *)&cfg_mask->cap.offset, ~0x0); 1676 pci_set_long((uint8_t *)&cfg_mask->cap.length, ~0x0); 1677 pci_set_long(cfg_mask->pci_cfg_data, ~0x0); 1678 } 1679 1680 if (proxy->nvectors) { 1681 int err = msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1682 proxy->msix_bar_idx, NULL); 1683 if (err) { 1684 /* Notice when a system that supports MSIx can't initialize it */ 1685 if (err != -ENOTSUP) { 1686 warn_report("unable to init msix vectors to %" PRIu32, 1687 proxy->nvectors); 1688 } 1689 proxy->nvectors = 0; 1690 } 1691 } 1692 1693 proxy->pci_dev.config_write = virtio_write_config; 1694 proxy->pci_dev.config_read = virtio_read_config; 1695 1696 if (legacy) { 1697 size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) 1698 + virtio_bus_get_vdev_config_len(bus); 1699 size = pow2ceil(size); 1700 1701 memory_region_init_io(&proxy->bar, OBJECT(proxy), 1702 &virtio_pci_config_ops, 1703 proxy, "virtio-pci", size); 1704 1705 pci_register_bar(&proxy->pci_dev, proxy->legacy_io_bar_idx, 1706 PCI_BASE_ADDRESS_SPACE_IO, &proxy->bar); 1707 } 1708 } 1709 1710 static void virtio_pci_device_unplugged(DeviceState *d) 1711 { 1712 VirtIOPCIProxy *proxy = VIRTIO_PCI(d); 1713 bool modern = virtio_pci_modern(proxy); 1714 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY; 1715 1716 virtio_pci_stop_ioeventfd(proxy); 1717 1718 if (modern) { 1719 virtio_pci_modern_mem_region_unmap(proxy, &proxy->common); 1720 virtio_pci_modern_mem_region_unmap(proxy, &proxy->isr); 1721 virtio_pci_modern_mem_region_unmap(proxy, &proxy->device); 1722 virtio_pci_modern_mem_region_unmap(proxy, &proxy->notify); 1723 if (modern_pio) { 1724 virtio_pci_modern_io_region_unmap(proxy, &proxy->notify_pio); 1725 } 1726 } 1727 } 1728 1729 static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp) 1730 { 1731 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev); 1732 VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev); 1733 bool pcie_port = pci_bus_is_express(pci_get_bus(pci_dev)) && 1734 !pci_bus_is_root(pci_get_bus(pci_dev)); 1735 1736 if (kvm_enabled() && !kvm_has_many_ioeventfds()) { 1737 proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; 1738 } 1739 1740 /* 1741 * virtio pci bar layout used by default. 1742 * subclasses can re-arrange things if needed. 1743 * 1744 * region 0 -- virtio legacy io bar 1745 * region 1 -- msi-x bar 1746 * region 4+5 -- virtio modern memory (64bit) bar 1747 * 1748 */ 1749 proxy->legacy_io_bar_idx = 0; 1750 proxy->msix_bar_idx = 1; 1751 proxy->modern_io_bar_idx = 2; 1752 proxy->modern_mem_bar_idx = 4; 1753 1754 proxy->common.offset = 0x0; 1755 proxy->common.size = 0x1000; 1756 proxy->common.type = VIRTIO_PCI_CAP_COMMON_CFG; 1757 1758 proxy->isr.offset = 0x1000; 1759 proxy->isr.size = 0x1000; 1760 proxy->isr.type = VIRTIO_PCI_CAP_ISR_CFG; 1761 1762 proxy->device.offset = 0x2000; 1763 proxy->device.size = 0x1000; 1764 proxy->device.type = VIRTIO_PCI_CAP_DEVICE_CFG; 1765 1766 proxy->notify.offset = 0x3000; 1767 proxy->notify.size = virtio_pci_queue_mem_mult(proxy) * VIRTIO_QUEUE_MAX; 1768 proxy->notify.type = VIRTIO_PCI_CAP_NOTIFY_CFG; 1769 1770 proxy->notify_pio.offset = 0x0; 1771 proxy->notify_pio.size = 0x4; 1772 proxy->notify_pio.type = VIRTIO_PCI_CAP_NOTIFY_CFG; 1773 1774 /* subclasses can enforce modern, so do this unconditionally */ 1775 memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci", 1776 /* PCI BAR regions must be powers of 2 */ 1777 pow2ceil(proxy->notify.offset + proxy->notify.size)); 1778 1779 if (proxy->disable_legacy == ON_OFF_AUTO_AUTO) { 1780 proxy->disable_legacy = pcie_port ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF; 1781 } 1782 1783 if (!virtio_pci_modern(proxy) && !virtio_pci_legacy(proxy)) { 1784 error_setg(errp, "device cannot work as neither modern nor legacy mode" 1785 " is enabled"); 1786 error_append_hint(errp, "Set either disable-modern or disable-legacy" 1787 " to off\n"); 1788 return; 1789 } 1790 1791 if (pcie_port && pci_is_express(pci_dev)) { 1792 int pos; 1793 1794 pos = pcie_endpoint_cap_init(pci_dev, 0); 1795 assert(pos > 0); 1796 1797 pos = pci_add_capability(pci_dev, PCI_CAP_ID_PM, 0, 1798 PCI_PM_SIZEOF, errp); 1799 if (pos < 0) { 1800 return; 1801 } 1802 1803 pci_dev->exp.pm_cap = pos; 1804 1805 /* 1806 * Indicates that this function complies with revision 1.2 of the 1807 * PCI Power Management Interface Specification. 1808 */ 1809 pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3); 1810 1811 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_DEVERR) { 1812 /* Init error enabling flags */ 1813 pcie_cap_deverr_init(pci_dev); 1814 } 1815 1816 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_LNKCTL) { 1817 /* Init Link Control Register */ 1818 pcie_cap_lnkctl_init(pci_dev); 1819 } 1820 1821 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_PM) { 1822 /* Init Power Management Control Register */ 1823 pci_set_word(pci_dev->wmask + pos + PCI_PM_CTRL, 1824 PCI_PM_CTRL_STATE_MASK); 1825 } 1826 1827 if (proxy->flags & VIRTIO_PCI_FLAG_ATS) { 1828 pcie_ats_init(pci_dev, 256); 1829 } 1830 1831 } else { 1832 /* 1833 * make future invocations of pci_is_express() return false 1834 * and pci_config_size() return PCI_CONFIG_SPACE_SIZE. 1835 */ 1836 pci_dev->cap_present &= ~QEMU_PCI_CAP_EXPRESS; 1837 } 1838 1839 virtio_pci_bus_new(&proxy->bus, sizeof(proxy->bus), proxy); 1840 if (k->realize) { 1841 k->realize(proxy, errp); 1842 } 1843 } 1844 1845 static void virtio_pci_exit(PCIDevice *pci_dev) 1846 { 1847 msix_uninit_exclusive_bar(pci_dev); 1848 } 1849 1850 static void virtio_pci_reset(DeviceState *qdev) 1851 { 1852 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev); 1853 VirtioBusState *bus = VIRTIO_BUS(&proxy->bus); 1854 PCIDevice *dev = PCI_DEVICE(qdev); 1855 int i; 1856 1857 virtio_pci_stop_ioeventfd(proxy); 1858 virtio_bus_reset(bus); 1859 msix_unuse_all_vectors(&proxy->pci_dev); 1860 1861 for (i = 0; i < VIRTIO_QUEUE_MAX; i++) { 1862 proxy->vqs[i].enabled = 0; 1863 proxy->vqs[i].num = 0; 1864 proxy->vqs[i].desc[0] = proxy->vqs[i].desc[1] = 0; 1865 proxy->vqs[i].avail[0] = proxy->vqs[i].avail[1] = 0; 1866 proxy->vqs[i].used[0] = proxy->vqs[i].used[1] = 0; 1867 } 1868 1869 if (pci_is_express(dev)) { 1870 pcie_cap_deverr_reset(dev); 1871 pcie_cap_lnkctl_reset(dev); 1872 1873 pci_set_word(dev->config + dev->exp.pm_cap + PCI_PM_CTRL, 0); 1874 } 1875 } 1876 1877 static Property virtio_pci_properties[] = { 1878 DEFINE_PROP_BIT("virtio-pci-bus-master-bug-migration", VirtIOPCIProxy, flags, 1879 VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT, false), 1880 DEFINE_PROP_ON_OFF_AUTO("disable-legacy", VirtIOPCIProxy, disable_legacy, 1881 ON_OFF_AUTO_AUTO), 1882 DEFINE_PROP_BOOL("disable-modern", VirtIOPCIProxy, disable_modern, false), 1883 DEFINE_PROP_BIT("migrate-extra", VirtIOPCIProxy, flags, 1884 VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT, true), 1885 DEFINE_PROP_BIT("modern-pio-notify", VirtIOPCIProxy, flags, 1886 VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT, false), 1887 DEFINE_PROP_BIT("x-disable-pcie", VirtIOPCIProxy, flags, 1888 VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT, false), 1889 DEFINE_PROP_BIT("page-per-vq", VirtIOPCIProxy, flags, 1890 VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT, false), 1891 DEFINE_PROP_BOOL("x-ignore-backend-features", VirtIOPCIProxy, 1892 ignore_backend_features, false), 1893 DEFINE_PROP_BIT("ats", VirtIOPCIProxy, flags, 1894 VIRTIO_PCI_FLAG_ATS_BIT, false), 1895 DEFINE_PROP_BIT("x-pcie-deverr-init", VirtIOPCIProxy, flags, 1896 VIRTIO_PCI_FLAG_INIT_DEVERR_BIT, true), 1897 DEFINE_PROP_BIT("x-pcie-lnkctl-init", VirtIOPCIProxy, flags, 1898 VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT, true), 1899 DEFINE_PROP_BIT("x-pcie-pm-init", VirtIOPCIProxy, flags, 1900 VIRTIO_PCI_FLAG_INIT_PM_BIT, true), 1901 DEFINE_PROP_END_OF_LIST(), 1902 }; 1903 1904 static void virtio_pci_dc_realize(DeviceState *qdev, Error **errp) 1905 { 1906 VirtioPCIClass *vpciklass = VIRTIO_PCI_GET_CLASS(qdev); 1907 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev); 1908 PCIDevice *pci_dev = &proxy->pci_dev; 1909 1910 if (!(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_PCIE) && 1911 virtio_pci_modern(proxy)) { 1912 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS; 1913 } 1914 1915 vpciklass->parent_dc_realize(qdev, errp); 1916 } 1917 1918 static void virtio_pci_class_init(ObjectClass *klass, void *data) 1919 { 1920 DeviceClass *dc = DEVICE_CLASS(klass); 1921 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 1922 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass); 1923 1924 dc->props = virtio_pci_properties; 1925 k->realize = virtio_pci_realize; 1926 k->exit = virtio_pci_exit; 1927 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1928 k->revision = VIRTIO_PCI_ABI_VERSION; 1929 k->class_id = PCI_CLASS_OTHERS; 1930 device_class_set_parent_realize(dc, virtio_pci_dc_realize, 1931 &vpciklass->parent_dc_realize); 1932 dc->reset = virtio_pci_reset; 1933 } 1934 1935 static const TypeInfo virtio_pci_info = { 1936 .name = TYPE_VIRTIO_PCI, 1937 .parent = TYPE_PCI_DEVICE, 1938 .instance_size = sizeof(VirtIOPCIProxy), 1939 .class_init = virtio_pci_class_init, 1940 .class_size = sizeof(VirtioPCIClass), 1941 .abstract = true, 1942 .interfaces = (InterfaceInfo[]) { 1943 { INTERFACE_PCIE_DEVICE }, 1944 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 1945 { } 1946 }, 1947 }; 1948 1949 /* virtio-blk-pci */ 1950 1951 static Property virtio_blk_pci_properties[] = { 1952 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 1953 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 1954 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 1955 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 1956 DEV_NVECTORS_UNSPECIFIED), 1957 DEFINE_PROP_END_OF_LIST(), 1958 }; 1959 1960 static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 1961 { 1962 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev); 1963 DeviceState *vdev = DEVICE(&dev->vdev); 1964 1965 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 1966 vpci_dev->nvectors = dev->vdev.conf.num_queues + 1; 1967 } 1968 1969 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 1970 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 1971 } 1972 1973 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data) 1974 { 1975 DeviceClass *dc = DEVICE_CLASS(klass); 1976 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 1977 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 1978 1979 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1980 dc->props = virtio_blk_pci_properties; 1981 k->realize = virtio_blk_pci_realize; 1982 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 1983 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; 1984 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 1985 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 1986 } 1987 1988 static void virtio_blk_pci_instance_init(Object *obj) 1989 { 1990 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj); 1991 1992 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 1993 TYPE_VIRTIO_BLK); 1994 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 1995 "bootindex", &error_abort); 1996 } 1997 1998 static const TypeInfo virtio_blk_pci_info = { 1999 .name = TYPE_VIRTIO_BLK_PCI, 2000 .parent = TYPE_VIRTIO_PCI, 2001 .instance_size = sizeof(VirtIOBlkPCI), 2002 .instance_init = virtio_blk_pci_instance_init, 2003 .class_init = virtio_blk_pci_class_init, 2004 }; 2005 2006 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) 2007 /* vhost-user-blk */ 2008 2009 static Property vhost_user_blk_pci_properties[] = { 2010 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 2011 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2012 DEV_NVECTORS_UNSPECIFIED), 2013 DEFINE_PROP_END_OF_LIST(), 2014 }; 2015 2016 static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2017 { 2018 VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev); 2019 DeviceState *vdev = DEVICE(&dev->vdev); 2020 2021 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 2022 vpci_dev->nvectors = dev->vdev.num_queues + 1; 2023 } 2024 2025 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2026 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2027 } 2028 2029 static void vhost_user_blk_pci_class_init(ObjectClass *klass, void *data) 2030 { 2031 DeviceClass *dc = DEVICE_CLASS(klass); 2032 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2033 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2034 2035 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2036 dc->props = vhost_user_blk_pci_properties; 2037 k->realize = vhost_user_blk_pci_realize; 2038 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2039 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; 2040 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 2041 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 2042 } 2043 2044 static void vhost_user_blk_pci_instance_init(Object *obj) 2045 { 2046 VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj); 2047 2048 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2049 TYPE_VHOST_USER_BLK); 2050 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 2051 "bootindex", &error_abort); 2052 } 2053 2054 static const TypeInfo vhost_user_blk_pci_info = { 2055 .name = TYPE_VHOST_USER_BLK_PCI, 2056 .parent = TYPE_VIRTIO_PCI, 2057 .instance_size = sizeof(VHostUserBlkPCI), 2058 .instance_init = vhost_user_blk_pci_instance_init, 2059 .class_init = vhost_user_blk_pci_class_init, 2060 }; 2061 #endif 2062 2063 /* virtio-scsi-pci */ 2064 2065 static Property virtio_scsi_pci_properties[] = { 2066 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 2067 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 2068 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2069 DEV_NVECTORS_UNSPECIFIED), 2070 DEFINE_PROP_END_OF_LIST(), 2071 }; 2072 2073 static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2074 { 2075 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev); 2076 DeviceState *vdev = DEVICE(&dev->vdev); 2077 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); 2078 DeviceState *proxy = DEVICE(vpci_dev); 2079 char *bus_name; 2080 2081 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 2082 vpci_dev->nvectors = vs->conf.num_queues + 3; 2083 } 2084 2085 /* 2086 * For command line compatibility, this sets the virtio-scsi-device bus 2087 * name as before. 2088 */ 2089 if (proxy->id) { 2090 bus_name = g_strdup_printf("%s.0", proxy->id); 2091 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 2092 g_free(bus_name); 2093 } 2094 2095 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2096 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2097 } 2098 2099 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data) 2100 { 2101 DeviceClass *dc = DEVICE_CLASS(klass); 2102 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2103 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2104 2105 k->realize = virtio_scsi_pci_realize; 2106 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2107 dc->props = virtio_scsi_pci_properties; 2108 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2109 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 2110 pcidev_k->revision = 0x00; 2111 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 2112 } 2113 2114 static void virtio_scsi_pci_instance_init(Object *obj) 2115 { 2116 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj); 2117 2118 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2119 TYPE_VIRTIO_SCSI); 2120 } 2121 2122 static const TypeInfo virtio_scsi_pci_info = { 2123 .name = TYPE_VIRTIO_SCSI_PCI, 2124 .parent = TYPE_VIRTIO_PCI, 2125 .instance_size = sizeof(VirtIOSCSIPCI), 2126 .instance_init = virtio_scsi_pci_instance_init, 2127 .class_init = virtio_scsi_pci_class_init, 2128 }; 2129 2130 /* vhost-scsi-pci */ 2131 2132 #ifdef CONFIG_VHOST_SCSI 2133 static Property vhost_scsi_pci_properties[] = { 2134 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2135 DEV_NVECTORS_UNSPECIFIED), 2136 DEFINE_PROP_END_OF_LIST(), 2137 }; 2138 2139 static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2140 { 2141 VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev); 2142 DeviceState *vdev = DEVICE(&dev->vdev); 2143 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); 2144 2145 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 2146 vpci_dev->nvectors = vs->conf.num_queues + 3; 2147 } 2148 2149 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2150 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2151 } 2152 2153 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data) 2154 { 2155 DeviceClass *dc = DEVICE_CLASS(klass); 2156 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2157 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2158 k->realize = vhost_scsi_pci_realize; 2159 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2160 dc->props = vhost_scsi_pci_properties; 2161 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2162 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 2163 pcidev_k->revision = 0x00; 2164 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 2165 } 2166 2167 static void vhost_scsi_pci_instance_init(Object *obj) 2168 { 2169 VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj); 2170 2171 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2172 TYPE_VHOST_SCSI); 2173 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 2174 "bootindex", &error_abort); 2175 } 2176 2177 static const TypeInfo vhost_scsi_pci_info = { 2178 .name = TYPE_VHOST_SCSI_PCI, 2179 .parent = TYPE_VIRTIO_PCI, 2180 .instance_size = sizeof(VHostSCSIPCI), 2181 .instance_init = vhost_scsi_pci_instance_init, 2182 .class_init = vhost_scsi_pci_class_init, 2183 }; 2184 #endif 2185 2186 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) 2187 /* vhost-user-scsi-pci */ 2188 static Property vhost_user_scsi_pci_properties[] = { 2189 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2190 DEV_NVECTORS_UNSPECIFIED), 2191 DEFINE_PROP_END_OF_LIST(), 2192 }; 2193 2194 static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2195 { 2196 VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(vpci_dev); 2197 DeviceState *vdev = DEVICE(&dev->vdev); 2198 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); 2199 2200 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 2201 vpci_dev->nvectors = vs->conf.num_queues + 3; 2202 } 2203 2204 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2205 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2206 } 2207 2208 static void vhost_user_scsi_pci_class_init(ObjectClass *klass, void *data) 2209 { 2210 DeviceClass *dc = DEVICE_CLASS(klass); 2211 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2212 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2213 k->realize = vhost_user_scsi_pci_realize; 2214 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2215 dc->props = vhost_user_scsi_pci_properties; 2216 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2217 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 2218 pcidev_k->revision = 0x00; 2219 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 2220 } 2221 2222 static void vhost_user_scsi_pci_instance_init(Object *obj) 2223 { 2224 VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj); 2225 2226 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2227 TYPE_VHOST_USER_SCSI); 2228 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 2229 "bootindex", &error_abort); 2230 } 2231 2232 static const TypeInfo vhost_user_scsi_pci_info = { 2233 .name = TYPE_VHOST_USER_SCSI_PCI, 2234 .parent = TYPE_VIRTIO_PCI, 2235 .instance_size = sizeof(VHostUserSCSIPCI), 2236 .instance_init = vhost_user_scsi_pci_instance_init, 2237 .class_init = vhost_user_scsi_pci_class_init, 2238 }; 2239 #endif 2240 2241 /* vhost-vsock-pci */ 2242 2243 #ifdef CONFIG_VHOST_VSOCK 2244 static Property vhost_vsock_pci_properties[] = { 2245 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), 2246 DEFINE_PROP_END_OF_LIST(), 2247 }; 2248 2249 static void vhost_vsock_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2250 { 2251 VHostVSockPCI *dev = VHOST_VSOCK_PCI(vpci_dev); 2252 DeviceState *vdev = DEVICE(&dev->vdev); 2253 2254 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2255 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2256 } 2257 2258 static void vhost_vsock_pci_class_init(ObjectClass *klass, void *data) 2259 { 2260 DeviceClass *dc = DEVICE_CLASS(klass); 2261 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2262 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2263 k->realize = vhost_vsock_pci_realize; 2264 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 2265 dc->props = vhost_vsock_pci_properties; 2266 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2267 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_VSOCK; 2268 pcidev_k->revision = 0x00; 2269 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER; 2270 } 2271 2272 static void vhost_vsock_pci_instance_init(Object *obj) 2273 { 2274 VHostVSockPCI *dev = VHOST_VSOCK_PCI(obj); 2275 2276 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2277 TYPE_VHOST_VSOCK); 2278 } 2279 2280 static const TypeInfo vhost_vsock_pci_info = { 2281 .name = TYPE_VHOST_VSOCK_PCI, 2282 .parent = TYPE_VIRTIO_PCI, 2283 .instance_size = sizeof(VHostVSockPCI), 2284 .instance_init = vhost_vsock_pci_instance_init, 2285 .class_init = vhost_vsock_pci_class_init, 2286 }; 2287 #endif 2288 2289 /* virtio-balloon-pci */ 2290 2291 static Property virtio_balloon_pci_properties[] = { 2292 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 2293 DEFINE_PROP_END_OF_LIST(), 2294 }; 2295 2296 static void virtio_balloon_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2297 { 2298 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev); 2299 DeviceState *vdev = DEVICE(&dev->vdev); 2300 2301 if (vpci_dev->class_code != PCI_CLASS_OTHERS && 2302 vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */ 2303 vpci_dev->class_code = PCI_CLASS_OTHERS; 2304 } 2305 2306 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2307 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2308 } 2309 2310 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data) 2311 { 2312 DeviceClass *dc = DEVICE_CLASS(klass); 2313 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2314 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2315 k->realize = virtio_balloon_pci_realize; 2316 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 2317 dc->props = virtio_balloon_pci_properties; 2318 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2319 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON; 2320 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 2321 pcidev_k->class_id = PCI_CLASS_OTHERS; 2322 } 2323 2324 static void virtio_balloon_pci_instance_init(Object *obj) 2325 { 2326 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj); 2327 2328 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2329 TYPE_VIRTIO_BALLOON); 2330 object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev), 2331 "guest-stats", &error_abort); 2332 object_property_add_alias(obj, "guest-stats-polling-interval", 2333 OBJECT(&dev->vdev), 2334 "guest-stats-polling-interval", &error_abort); 2335 } 2336 2337 static const TypeInfo virtio_balloon_pci_info = { 2338 .name = TYPE_VIRTIO_BALLOON_PCI, 2339 .parent = TYPE_VIRTIO_PCI, 2340 .instance_size = sizeof(VirtIOBalloonPCI), 2341 .instance_init = virtio_balloon_pci_instance_init, 2342 .class_init = virtio_balloon_pci_class_init, 2343 }; 2344 2345 /* virtio-serial-pci */ 2346 2347 static void virtio_serial_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2348 { 2349 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev); 2350 DeviceState *vdev = DEVICE(&dev->vdev); 2351 DeviceState *proxy = DEVICE(vpci_dev); 2352 char *bus_name; 2353 2354 if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER && 2355 vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */ 2356 vpci_dev->class_code != PCI_CLASS_OTHERS) { /* qemu-kvm */ 2357 vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER; 2358 } 2359 2360 /* backwards-compatibility with machines that were created with 2361 DEV_NVECTORS_UNSPECIFIED */ 2362 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 2363 vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1; 2364 } 2365 2366 /* 2367 * For command line compatibility, this sets the virtio-serial-device bus 2368 * name as before. 2369 */ 2370 if (proxy->id) { 2371 bus_name = g_strdup_printf("%s.0", proxy->id); 2372 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 2373 g_free(bus_name); 2374 } 2375 2376 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2377 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2378 } 2379 2380 static Property virtio_serial_pci_properties[] = { 2381 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 2382 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 2383 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 2384 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 2385 DEFINE_PROP_END_OF_LIST(), 2386 }; 2387 2388 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data) 2389 { 2390 DeviceClass *dc = DEVICE_CLASS(klass); 2391 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2392 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2393 k->realize = virtio_serial_pci_realize; 2394 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 2395 dc->props = virtio_serial_pci_properties; 2396 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2397 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE; 2398 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 2399 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER; 2400 } 2401 2402 static void virtio_serial_pci_instance_init(Object *obj) 2403 { 2404 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj); 2405 2406 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2407 TYPE_VIRTIO_SERIAL); 2408 } 2409 2410 static const TypeInfo virtio_serial_pci_info = { 2411 .name = TYPE_VIRTIO_SERIAL_PCI, 2412 .parent = TYPE_VIRTIO_PCI, 2413 .instance_size = sizeof(VirtIOSerialPCI), 2414 .instance_init = virtio_serial_pci_instance_init, 2415 .class_init = virtio_serial_pci_class_init, 2416 }; 2417 2418 /* virtio-net-pci */ 2419 2420 static Property virtio_net_properties[] = { 2421 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 2422 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 2423 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), 2424 DEFINE_PROP_END_OF_LIST(), 2425 }; 2426 2427 static void virtio_net_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2428 { 2429 DeviceState *qdev = DEVICE(vpci_dev); 2430 VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev); 2431 DeviceState *vdev = DEVICE(&dev->vdev); 2432 2433 virtio_net_set_netclient_name(&dev->vdev, qdev->id, 2434 object_get_typename(OBJECT(qdev))); 2435 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2436 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2437 } 2438 2439 static void virtio_net_pci_class_init(ObjectClass *klass, void *data) 2440 { 2441 DeviceClass *dc = DEVICE_CLASS(klass); 2442 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 2443 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass); 2444 2445 k->romfile = "efi-virtio.rom"; 2446 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2447 k->device_id = PCI_DEVICE_ID_VIRTIO_NET; 2448 k->revision = VIRTIO_PCI_ABI_VERSION; 2449 k->class_id = PCI_CLASS_NETWORK_ETHERNET; 2450 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 2451 dc->props = virtio_net_properties; 2452 vpciklass->realize = virtio_net_pci_realize; 2453 } 2454 2455 static void virtio_net_pci_instance_init(Object *obj) 2456 { 2457 VirtIONetPCI *dev = VIRTIO_NET_PCI(obj); 2458 2459 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2460 TYPE_VIRTIO_NET); 2461 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 2462 "bootindex", &error_abort); 2463 } 2464 2465 static const TypeInfo virtio_net_pci_info = { 2466 .name = TYPE_VIRTIO_NET_PCI, 2467 .parent = TYPE_VIRTIO_PCI, 2468 .instance_size = sizeof(VirtIONetPCI), 2469 .instance_init = virtio_net_pci_instance_init, 2470 .class_init = virtio_net_pci_class_init, 2471 }; 2472 2473 /* virtio-rng-pci */ 2474 2475 static void virtio_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2476 { 2477 VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev); 2478 DeviceState *vdev = DEVICE(&vrng->vdev); 2479 Error *err = NULL; 2480 2481 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2482 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 2483 if (err) { 2484 error_propagate(errp, err); 2485 return; 2486 } 2487 2488 object_property_set_link(OBJECT(vrng), 2489 OBJECT(vrng->vdev.conf.rng), "rng", 2490 NULL); 2491 } 2492 2493 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data) 2494 { 2495 DeviceClass *dc = DEVICE_CLASS(klass); 2496 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2497 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2498 2499 k->realize = virtio_rng_pci_realize; 2500 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 2501 2502 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 2503 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG; 2504 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 2505 pcidev_k->class_id = PCI_CLASS_OTHERS; 2506 } 2507 2508 static void virtio_rng_initfn(Object *obj) 2509 { 2510 VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj); 2511 2512 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2513 TYPE_VIRTIO_RNG); 2514 } 2515 2516 static const TypeInfo virtio_rng_pci_info = { 2517 .name = TYPE_VIRTIO_RNG_PCI, 2518 .parent = TYPE_VIRTIO_PCI, 2519 .instance_size = sizeof(VirtIORngPCI), 2520 .instance_init = virtio_rng_initfn, 2521 .class_init = virtio_rng_pci_class_init, 2522 }; 2523 2524 /* virtio-input-pci */ 2525 2526 static Property virtio_input_pci_properties[] = { 2527 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), 2528 DEFINE_PROP_END_OF_LIST(), 2529 }; 2530 2531 static void virtio_input_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 2532 { 2533 VirtIOInputPCI *vinput = VIRTIO_INPUT_PCI(vpci_dev); 2534 DeviceState *vdev = DEVICE(&vinput->vdev); 2535 2536 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 2537 virtio_pci_force_virtio_1(vpci_dev); 2538 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 2539 } 2540 2541 static void virtio_input_pci_class_init(ObjectClass *klass, void *data) 2542 { 2543 DeviceClass *dc = DEVICE_CLASS(klass); 2544 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 2545 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2546 2547 dc->props = virtio_input_pci_properties; 2548 k->realize = virtio_input_pci_realize; 2549 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 2550 2551 pcidev_k->class_id = PCI_CLASS_INPUT_OTHER; 2552 } 2553 2554 static void virtio_input_hid_kbd_pci_class_init(ObjectClass *klass, void *data) 2555 { 2556 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2557 2558 pcidev_k->class_id = PCI_CLASS_INPUT_KEYBOARD; 2559 } 2560 2561 static void virtio_input_hid_mouse_pci_class_init(ObjectClass *klass, 2562 void *data) 2563 { 2564 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 2565 2566 pcidev_k->class_id = PCI_CLASS_INPUT_MOUSE; 2567 } 2568 2569 static void virtio_keyboard_initfn(Object *obj) 2570 { 2571 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj); 2572 2573 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2574 TYPE_VIRTIO_KEYBOARD); 2575 } 2576 2577 static void virtio_mouse_initfn(Object *obj) 2578 { 2579 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj); 2580 2581 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2582 TYPE_VIRTIO_MOUSE); 2583 } 2584 2585 static void virtio_tablet_initfn(Object *obj) 2586 { 2587 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj); 2588 2589 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2590 TYPE_VIRTIO_TABLET); 2591 } 2592 2593 static const TypeInfo virtio_input_pci_info = { 2594 .name = TYPE_VIRTIO_INPUT_PCI, 2595 .parent = TYPE_VIRTIO_PCI, 2596 .instance_size = sizeof(VirtIOInputPCI), 2597 .class_init = virtio_input_pci_class_init, 2598 .abstract = true, 2599 }; 2600 2601 static const TypeInfo virtio_input_hid_pci_info = { 2602 .name = TYPE_VIRTIO_INPUT_HID_PCI, 2603 .parent = TYPE_VIRTIO_INPUT_PCI, 2604 .instance_size = sizeof(VirtIOInputHIDPCI), 2605 .abstract = true, 2606 }; 2607 2608 static const TypeInfo virtio_keyboard_pci_info = { 2609 .name = TYPE_VIRTIO_KEYBOARD_PCI, 2610 .parent = TYPE_VIRTIO_INPUT_HID_PCI, 2611 .class_init = virtio_input_hid_kbd_pci_class_init, 2612 .instance_size = sizeof(VirtIOInputHIDPCI), 2613 .instance_init = virtio_keyboard_initfn, 2614 }; 2615 2616 static const TypeInfo virtio_mouse_pci_info = { 2617 .name = TYPE_VIRTIO_MOUSE_PCI, 2618 .parent = TYPE_VIRTIO_INPUT_HID_PCI, 2619 .class_init = virtio_input_hid_mouse_pci_class_init, 2620 .instance_size = sizeof(VirtIOInputHIDPCI), 2621 .instance_init = virtio_mouse_initfn, 2622 }; 2623 2624 static const TypeInfo virtio_tablet_pci_info = { 2625 .name = TYPE_VIRTIO_TABLET_PCI, 2626 .parent = TYPE_VIRTIO_INPUT_HID_PCI, 2627 .instance_size = sizeof(VirtIOInputHIDPCI), 2628 .instance_init = virtio_tablet_initfn, 2629 }; 2630 2631 #ifdef CONFIG_LINUX 2632 static void virtio_host_initfn(Object *obj) 2633 { 2634 VirtIOInputHostPCI *dev = VIRTIO_INPUT_HOST_PCI(obj); 2635 2636 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 2637 TYPE_VIRTIO_INPUT_HOST); 2638 } 2639 2640 static const TypeInfo virtio_host_pci_info = { 2641 .name = TYPE_VIRTIO_INPUT_HOST_PCI, 2642 .parent = TYPE_VIRTIO_INPUT_PCI, 2643 .instance_size = sizeof(VirtIOInputHostPCI), 2644 .instance_init = virtio_host_initfn, 2645 }; 2646 #endif 2647 2648 /* virtio-pci-bus */ 2649 2650 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size, 2651 VirtIOPCIProxy *dev) 2652 { 2653 DeviceState *qdev = DEVICE(dev); 2654 char virtio_bus_name[] = "virtio-bus"; 2655 2656 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev, 2657 virtio_bus_name); 2658 } 2659 2660 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data) 2661 { 2662 BusClass *bus_class = BUS_CLASS(klass); 2663 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 2664 bus_class->max_dev = 1; 2665 k->notify = virtio_pci_notify; 2666 k->save_config = virtio_pci_save_config; 2667 k->load_config = virtio_pci_load_config; 2668 k->save_queue = virtio_pci_save_queue; 2669 k->load_queue = virtio_pci_load_queue; 2670 k->save_extra_state = virtio_pci_save_extra_state; 2671 k->load_extra_state = virtio_pci_load_extra_state; 2672 k->has_extra_state = virtio_pci_has_extra_state; 2673 k->query_guest_notifiers = virtio_pci_query_guest_notifiers; 2674 k->set_guest_notifiers = virtio_pci_set_guest_notifiers; 2675 k->set_host_notifier_mr = virtio_pci_set_host_notifier_mr; 2676 k->vmstate_change = virtio_pci_vmstate_change; 2677 k->pre_plugged = virtio_pci_pre_plugged; 2678 k->device_plugged = virtio_pci_device_plugged; 2679 k->device_unplugged = virtio_pci_device_unplugged; 2680 k->query_nvectors = virtio_pci_query_nvectors; 2681 k->ioeventfd_enabled = virtio_pci_ioeventfd_enabled; 2682 k->ioeventfd_assign = virtio_pci_ioeventfd_assign; 2683 k->get_dma_as = virtio_pci_get_dma_as; 2684 } 2685 2686 static const TypeInfo virtio_pci_bus_info = { 2687 .name = TYPE_VIRTIO_PCI_BUS, 2688 .parent = TYPE_VIRTIO_BUS, 2689 .instance_size = sizeof(VirtioPCIBusState), 2690 .class_init = virtio_pci_bus_class_init, 2691 }; 2692 2693 static void virtio_pci_register_types(void) 2694 { 2695 type_register_static(&virtio_rng_pci_info); 2696 type_register_static(&virtio_input_pci_info); 2697 type_register_static(&virtio_input_hid_pci_info); 2698 type_register_static(&virtio_keyboard_pci_info); 2699 type_register_static(&virtio_mouse_pci_info); 2700 type_register_static(&virtio_tablet_pci_info); 2701 #ifdef CONFIG_LINUX 2702 type_register_static(&virtio_host_pci_info); 2703 #endif 2704 type_register_static(&virtio_pci_bus_info); 2705 type_register_static(&virtio_pci_info); 2706 #ifdef CONFIG_VIRTFS 2707 type_register_static(&virtio_9p_pci_info); 2708 #endif 2709 type_register_static(&virtio_blk_pci_info); 2710 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) 2711 type_register_static(&vhost_user_blk_pci_info); 2712 #endif 2713 type_register_static(&virtio_scsi_pci_info); 2714 type_register_static(&virtio_balloon_pci_info); 2715 type_register_static(&virtio_serial_pci_info); 2716 type_register_static(&virtio_net_pci_info); 2717 #ifdef CONFIG_VHOST_SCSI 2718 type_register_static(&vhost_scsi_pci_info); 2719 #endif 2720 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) 2721 type_register_static(&vhost_user_scsi_pci_info); 2722 #endif 2723 #ifdef CONFIG_VHOST_VSOCK 2724 type_register_static(&vhost_vsock_pci_info); 2725 #endif 2726 } 2727 2728 type_init(virtio_pci_register_types) 2729