1 /* 2 * Dynamic device configuration and creation. 3 * 4 * Copyright (c) 2009 CodeSourcery 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "hw/sysbus.h" 22 #include "monitor/hmp.h" 23 #include "monitor/monitor.h" 24 #include "monitor/qdev.h" 25 #include "system/arch_init.h" 26 #include "system/runstate.h" 27 #include "qapi/error.h" 28 #include "qapi/qapi-commands-qdev.h" 29 #include "qapi/qmp/dispatch.h" 30 #include "qapi/qmp/qdict.h" 31 #include "qapi/qmp/qerror.h" 32 #include "qapi/qmp/qstring.h" 33 #include "qapi/qobject-input-visitor.h" 34 #include "qemu/config-file.h" 35 #include "qemu/error-report.h" 36 #include "qemu/help_option.h" 37 #include "qemu/option.h" 38 #include "qemu/qemu-print.h" 39 #include "qemu/option_int.h" 40 #include "system/block-backend.h" 41 #include "migration/misc.h" 42 #include "qemu/cutils.h" 43 #include "hw/qdev-properties.h" 44 #include "hw/clock.h" 45 #include "hw/boards.h" 46 47 /* 48 * Aliases were a bad idea from the start. Let's keep them 49 * from spreading further. 50 */ 51 typedef struct QDevAlias 52 { 53 const char *typename; 54 const char *alias; 55 uint32_t arch_mask; 56 } QDevAlias; 57 58 /* default virtio transport per architecture */ 59 #define QEMU_ARCH_VIRTIO_PCI (QEMU_ARCH_ALPHA | \ 60 QEMU_ARCH_ARM | \ 61 QEMU_ARCH_HPPA | \ 62 QEMU_ARCH_I386 | \ 63 QEMU_ARCH_LOONGARCH | \ 64 QEMU_ARCH_MIPS | \ 65 QEMU_ARCH_OPENRISC | \ 66 QEMU_ARCH_PPC | \ 67 QEMU_ARCH_RISCV | \ 68 QEMU_ARCH_SH4 | \ 69 QEMU_ARCH_SPARC | \ 70 QEMU_ARCH_XTENSA) 71 #define QEMU_ARCH_VIRTIO_CCW (QEMU_ARCH_S390X) 72 #define QEMU_ARCH_VIRTIO_MMIO (QEMU_ARCH_M68K) 73 74 /* Please keep this table sorted by typename. */ 75 static const QDevAlias qdev_alias_table[] = { 76 { "AC97", "ac97" }, /* -soundhw name */ 77 { "e1000", "e1000-82540em" }, 78 { "ES1370", "es1370" }, /* -soundhw name */ 79 { "ich9-ahci", "ahci" }, 80 { "lsi53c895a", "lsi" }, 81 { "virtio-9p-device", "virtio-9p", QEMU_ARCH_VIRTIO_MMIO }, 82 { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_VIRTIO_CCW }, 83 { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_VIRTIO_PCI }, 84 { "virtio-balloon-device", "virtio-balloon", QEMU_ARCH_VIRTIO_MMIO }, 85 { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_VIRTIO_CCW }, 86 { "virtio-balloon-pci", "virtio-balloon", QEMU_ARCH_VIRTIO_PCI }, 87 { "virtio-blk-device", "virtio-blk", QEMU_ARCH_VIRTIO_MMIO }, 88 { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_VIRTIO_CCW }, 89 { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_VIRTIO_PCI }, 90 { "virtio-gpu-device", "virtio-gpu", QEMU_ARCH_VIRTIO_MMIO }, 91 { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_VIRTIO_CCW }, 92 { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_VIRTIO_PCI }, 93 { "virtio-gpu-gl-device", "virtio-gpu-gl", QEMU_ARCH_VIRTIO_MMIO }, 94 { "virtio-gpu-gl-pci", "virtio-gpu-gl", QEMU_ARCH_VIRTIO_PCI }, 95 { "virtio-gpu-rutabaga-device", "virtio-gpu-rutabaga", 96 QEMU_ARCH_VIRTIO_MMIO }, 97 { "virtio-gpu-rutabaga-pci", "virtio-gpu-rutabaga", QEMU_ARCH_VIRTIO_PCI }, 98 { "virtio-input-host-device", "virtio-input-host", QEMU_ARCH_VIRTIO_MMIO }, 99 { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_VIRTIO_CCW }, 100 { "virtio-input-host-pci", "virtio-input-host", QEMU_ARCH_VIRTIO_PCI }, 101 { "virtio-iommu-pci", "virtio-iommu", QEMU_ARCH_VIRTIO_PCI }, 102 { "virtio-keyboard-device", "virtio-keyboard", QEMU_ARCH_VIRTIO_MMIO }, 103 { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_VIRTIO_CCW }, 104 { "virtio-keyboard-pci", "virtio-keyboard", QEMU_ARCH_VIRTIO_PCI }, 105 { "virtio-mouse-device", "virtio-mouse", QEMU_ARCH_VIRTIO_MMIO }, 106 { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_VIRTIO_CCW }, 107 { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_VIRTIO_PCI }, 108 { "virtio-net-device", "virtio-net", QEMU_ARCH_VIRTIO_MMIO }, 109 { "virtio-net-ccw", "virtio-net", QEMU_ARCH_VIRTIO_CCW }, 110 { "virtio-net-pci", "virtio-net", QEMU_ARCH_VIRTIO_PCI }, 111 { "virtio-rng-device", "virtio-rng", QEMU_ARCH_VIRTIO_MMIO }, 112 { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_VIRTIO_CCW }, 113 { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_VIRTIO_PCI }, 114 { "virtio-scsi-device", "virtio-scsi", QEMU_ARCH_VIRTIO_MMIO }, 115 { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_VIRTIO_CCW }, 116 { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_VIRTIO_PCI }, 117 { "virtio-serial-device", "virtio-serial", QEMU_ARCH_VIRTIO_MMIO }, 118 { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_VIRTIO_CCW }, 119 { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_VIRTIO_PCI}, 120 { "virtio-sound-device", "virtio-sound", QEMU_ARCH_VIRTIO_MMIO }, 121 { "virtio-sound-pci", "virtio-sound", QEMU_ARCH_VIRTIO_PCI }, 122 { "virtio-tablet-device", "virtio-tablet", QEMU_ARCH_VIRTIO_MMIO }, 123 { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_VIRTIO_CCW }, 124 { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_VIRTIO_PCI }, 125 { } 126 }; 127 128 static const char *qdev_class_get_alias(DeviceClass *dc) 129 { 130 const char *typename = object_class_get_name(OBJECT_CLASS(dc)); 131 int i; 132 133 for (i = 0; qdev_alias_table[i].typename; i++) { 134 if (qdev_alias_table[i].arch_mask && 135 !(qdev_alias_table[i].arch_mask & arch_type)) { 136 continue; 137 } 138 139 if (strcmp(qdev_alias_table[i].typename, typename) == 0) { 140 return qdev_alias_table[i].alias; 141 } 142 } 143 144 return NULL; 145 } 146 147 static bool qdev_class_has_alias(DeviceClass *dc) 148 { 149 return (qdev_class_get_alias(dc) != NULL); 150 } 151 152 static void qdev_print_devinfo(DeviceClass *dc) 153 { 154 qemu_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc))); 155 if (dc->bus_type) { 156 qemu_printf(", bus %s", dc->bus_type); 157 } 158 if (qdev_class_has_alias(dc)) { 159 qemu_printf(", alias \"%s\"", qdev_class_get_alias(dc)); 160 } 161 if (dc->desc) { 162 qemu_printf(", desc \"%s\"", dc->desc); 163 } 164 if (!dc->user_creatable) { 165 qemu_printf(", no-user"); 166 } 167 qemu_printf("\n"); 168 } 169 170 static void qdev_print_devinfos(bool show_no_user) 171 { 172 static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = { 173 [DEVICE_CATEGORY_BRIDGE] = "Controller/Bridge/Hub", 174 [DEVICE_CATEGORY_USB] = "USB", 175 [DEVICE_CATEGORY_STORAGE] = "Storage", 176 [DEVICE_CATEGORY_NETWORK] = "Network", 177 [DEVICE_CATEGORY_INPUT] = "Input", 178 [DEVICE_CATEGORY_DISPLAY] = "Display", 179 [DEVICE_CATEGORY_SOUND] = "Sound", 180 [DEVICE_CATEGORY_MISC] = "Misc", 181 [DEVICE_CATEGORY_CPU] = "CPU", 182 [DEVICE_CATEGORY_WATCHDOG]= "Watchdog", 183 [DEVICE_CATEGORY_MAX] = "Uncategorized", 184 }; 185 GSList *list, *elt; 186 int i; 187 bool cat_printed; 188 189 module_load_qom_all(); 190 list = object_class_get_list_sorted(TYPE_DEVICE, false); 191 192 for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) { 193 cat_printed = false; 194 for (elt = list; elt; elt = elt->next) { 195 DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data, 196 TYPE_DEVICE); 197 if ((i < DEVICE_CATEGORY_MAX 198 ? !test_bit(i, dc->categories) 199 : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX)) 200 || (!show_no_user 201 && !dc->user_creatable)) { 202 continue; 203 } 204 if (!cat_printed) { 205 qemu_printf("%s%s devices:\n", i ? "\n" : "", cat_name[i]); 206 cat_printed = true; 207 } 208 qdev_print_devinfo(dc); 209 } 210 } 211 212 g_slist_free(list); 213 } 214 215 static const char *find_typename_by_alias(const char *alias) 216 { 217 int i; 218 219 for (i = 0; qdev_alias_table[i].alias; i++) { 220 if (qdev_alias_table[i].arch_mask && 221 !(qdev_alias_table[i].arch_mask & arch_type)) { 222 continue; 223 } 224 225 if (strcmp(qdev_alias_table[i].alias, alias) == 0) { 226 return qdev_alias_table[i].typename; 227 } 228 } 229 230 return NULL; 231 } 232 233 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp) 234 { 235 ObjectClass *oc; 236 DeviceClass *dc; 237 const char *original_name = *driver; 238 239 oc = module_object_class_by_name(*driver); 240 if (!oc) { 241 const char *typename = find_typename_by_alias(*driver); 242 243 if (typename) { 244 *driver = typename; 245 oc = module_object_class_by_name(*driver); 246 } 247 } 248 249 if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) { 250 if (*driver != original_name) { 251 error_setg(errp, "'%s' (alias '%s') is not a valid device model" 252 " name", original_name, *driver); 253 } else { 254 error_setg(errp, "'%s' is not a valid device model name", *driver); 255 } 256 return NULL; 257 } 258 259 if (object_class_is_abstract(oc)) { 260 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver", 261 "a non-abstract device type"); 262 return NULL; 263 } 264 265 dc = DEVICE_CLASS(oc); 266 if (!dc->user_creatable || 267 (phase_check(PHASE_MACHINE_READY) && !dc->hotpluggable)) { 268 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver", 269 "a pluggable device type"); 270 return NULL; 271 } 272 273 if (object_class_dynamic_cast(oc, TYPE_SYS_BUS_DEVICE)) { 274 /* sysbus devices need to be allowed by the machine */ 275 MachineClass *mc = MACHINE_CLASS(object_get_class(qdev_get_machine())); 276 if (!device_type_is_dynamic_sysbus(mc, *driver)) { 277 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver", 278 "a dynamic sysbus device type for the machine"); 279 return NULL; 280 } 281 } 282 283 return dc; 284 } 285 286 287 int qdev_device_help(QemuOpts *opts) 288 { 289 Error *local_err = NULL; 290 const char *driver; 291 ObjectPropertyInfoList *prop_list; 292 ObjectPropertyInfoList *prop; 293 GPtrArray *array; 294 int i; 295 296 driver = qemu_opt_get(opts, "driver"); 297 if (driver && is_help_option(driver)) { 298 qdev_print_devinfos(false); 299 return 1; 300 } 301 302 if (!driver || !qemu_opt_has_help_opt(opts)) { 303 return 0; 304 } 305 306 if (!object_class_by_name(driver)) { 307 const char *typename = find_typename_by_alias(driver); 308 309 if (typename) { 310 driver = typename; 311 } 312 } 313 314 prop_list = qmp_device_list_properties(driver, &local_err); 315 if (local_err) { 316 goto error; 317 } 318 319 if (prop_list) { 320 qemu_printf("%s options:\n", driver); 321 } else { 322 qemu_printf("There are no options for %s.\n", driver); 323 } 324 array = g_ptr_array_new(); 325 for (prop = prop_list; prop; prop = prop->next) { 326 g_ptr_array_add(array, 327 object_property_help(prop->value->name, 328 prop->value->type, 329 prop->value->default_value, 330 prop->value->description)); 331 } 332 g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0); 333 for (i = 0; i < array->len; i++) { 334 qemu_printf("%s\n", (char *)array->pdata[i]); 335 } 336 g_ptr_array_set_free_func(array, g_free); 337 g_ptr_array_free(array, true); 338 qapi_free_ObjectPropertyInfoList(prop_list); 339 return 1; 340 341 error: 342 error_report_err(local_err); 343 return 1; 344 } 345 346 static Object *qdev_get_peripheral(void) 347 { 348 static Object *dev; 349 350 if (dev == NULL) { 351 dev = container_get(qdev_get_machine(), "/peripheral"); 352 } 353 354 return dev; 355 } 356 357 static Object *qdev_get_peripheral_anon(void) 358 { 359 static Object *dev; 360 361 if (dev == NULL) { 362 dev = container_get(qdev_get_machine(), "/peripheral-anon"); 363 } 364 365 return dev; 366 } 367 368 static void qbus_error_append_bus_list_hint(DeviceState *dev, 369 Error *const *errp) 370 { 371 BusState *child; 372 const char *sep = " "; 373 374 error_append_hint(errp, "child buses at \"%s\":", 375 dev->id ? dev->id : object_get_typename(OBJECT(dev))); 376 QLIST_FOREACH(child, &dev->child_bus, sibling) { 377 error_append_hint(errp, "%s\"%s\"", sep, child->name); 378 sep = ", "; 379 } 380 error_append_hint(errp, "\n"); 381 } 382 383 static void qbus_error_append_dev_list_hint(BusState *bus, 384 Error *const *errp) 385 { 386 BusChild *kid; 387 const char *sep = " "; 388 389 error_append_hint(errp, "devices at \"%s\":", bus->name); 390 QTAILQ_FOREACH(kid, &bus->children, sibling) { 391 DeviceState *dev = kid->child; 392 error_append_hint(errp, "%s\"%s\"", sep, 393 object_get_typename(OBJECT(dev))); 394 if (dev->id) { 395 error_append_hint(errp, "/\"%s\"", dev->id); 396 } 397 sep = ", "; 398 } 399 error_append_hint(errp, "\n"); 400 } 401 402 static BusState *qbus_find_bus(DeviceState *dev, char *elem) 403 { 404 BusState *child; 405 406 QLIST_FOREACH(child, &dev->child_bus, sibling) { 407 if (strcmp(child->name, elem) == 0) { 408 return child; 409 } 410 } 411 return NULL; 412 } 413 414 static DeviceState *qbus_find_dev(BusState *bus, char *elem) 415 { 416 BusChild *kid; 417 418 /* 419 * try to match in order: 420 * (1) instance id, if present 421 * (2) driver name 422 * (3) driver alias, if present 423 */ 424 QTAILQ_FOREACH(kid, &bus->children, sibling) { 425 DeviceState *dev = kid->child; 426 if (dev->id && strcmp(dev->id, elem) == 0) { 427 return dev; 428 } 429 } 430 QTAILQ_FOREACH(kid, &bus->children, sibling) { 431 DeviceState *dev = kid->child; 432 if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) { 433 return dev; 434 } 435 } 436 QTAILQ_FOREACH(kid, &bus->children, sibling) { 437 DeviceState *dev = kid->child; 438 DeviceClass *dc = DEVICE_GET_CLASS(dev); 439 440 if (qdev_class_has_alias(dc) && 441 strcmp(qdev_class_get_alias(dc), elem) == 0) { 442 return dev; 443 } 444 } 445 return NULL; 446 } 447 448 static inline bool qbus_is_full(BusState *bus) 449 { 450 BusClass *bus_class; 451 452 if (bus->full) { 453 return true; 454 } 455 bus_class = BUS_GET_CLASS(bus); 456 return bus_class->max_dev && bus->num_children >= bus_class->max_dev; 457 } 458 459 /* 460 * Search the tree rooted at @bus for a bus. 461 * If @name, search for a bus with that name. Note that bus names 462 * need not be unique. Yes, that's screwed up. 463 * Else search for a bus that is a subtype of @bus_typename. 464 * If more than one exists, prefer one that can take another device. 465 * Return the bus if found, else %NULL. 466 */ 467 static BusState *qbus_find_recursive(BusState *bus, const char *name, 468 const char *bus_typename) 469 { 470 BusChild *kid; 471 BusState *pick, *child, *ret; 472 bool match; 473 474 assert(name || bus_typename); 475 if (name) { 476 match = !strcmp(bus->name, name); 477 } else { 478 match = !!object_dynamic_cast(OBJECT(bus), bus_typename); 479 } 480 481 if (match && !qbus_is_full(bus)) { 482 return bus; /* root matches and isn't full */ 483 } 484 485 pick = match ? bus : NULL; 486 487 QTAILQ_FOREACH(kid, &bus->children, sibling) { 488 DeviceState *dev = kid->child; 489 QLIST_FOREACH(child, &dev->child_bus, sibling) { 490 ret = qbus_find_recursive(child, name, bus_typename); 491 if (ret && !qbus_is_full(ret)) { 492 return ret; /* a descendant matches and isn't full */ 493 } 494 if (ret && !pick) { 495 pick = ret; 496 } 497 } 498 } 499 500 /* root or a descendant matches, but is full */ 501 return pick; 502 } 503 504 static BusState *qbus_find(const char *path, Error **errp) 505 { 506 DeviceState *dev; 507 BusState *bus; 508 char elem[128]; 509 int pos, len; 510 511 /* find start element */ 512 if (path[0] == '/') { 513 bus = sysbus_get_default(); 514 pos = 0; 515 } else { 516 if (sscanf(path, "%127[^/]%n", elem, &len) != 1) { 517 assert(!path[0]); 518 elem[0] = len = 0; 519 } 520 bus = qbus_find_recursive(sysbus_get_default(), elem, NULL); 521 if (!bus) { 522 error_setg(errp, "Bus '%s' not found", elem); 523 return NULL; 524 } 525 pos = len; 526 } 527 528 for (;;) { 529 assert(path[pos] == '/' || !path[pos]); 530 while (path[pos] == '/') { 531 pos++; 532 } 533 if (path[pos] == '\0') { 534 break; 535 } 536 537 /* find device */ 538 if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) { 539 g_assert_not_reached(); 540 elem[0] = len = 0; 541 } 542 pos += len; 543 dev = qbus_find_dev(bus, elem); 544 if (!dev) { 545 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 546 "Device '%s' not found", elem); 547 qbus_error_append_dev_list_hint(bus, errp); 548 return NULL; 549 } 550 551 assert(path[pos] == '/' || !path[pos]); 552 while (path[pos] == '/') { 553 pos++; 554 } 555 if (path[pos] == '\0') { 556 /* last specified element is a device. If it has exactly 557 * one child bus accept it nevertheless */ 558 if (dev->num_child_bus == 1) { 559 bus = QLIST_FIRST(&dev->child_bus); 560 break; 561 } 562 if (dev->num_child_bus) { 563 error_setg(errp, "Device '%s' has multiple child buses", 564 elem); 565 qbus_error_append_bus_list_hint(dev, errp); 566 } else { 567 error_setg(errp, "Device '%s' has no child bus", elem); 568 } 569 return NULL; 570 } 571 572 /* find bus */ 573 if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) { 574 g_assert_not_reached(); 575 elem[0] = len = 0; 576 } 577 pos += len; 578 bus = qbus_find_bus(dev, elem); 579 if (!bus) { 580 error_setg(errp, "Bus '%s' not found", elem); 581 qbus_error_append_bus_list_hint(dev, errp); 582 return NULL; 583 } 584 } 585 586 if (qbus_is_full(bus)) { 587 error_setg(errp, "Bus '%s' is full", path); 588 return NULL; 589 } 590 return bus; 591 } 592 593 /* Takes ownership of @id, will be freed when deleting the device */ 594 const char *qdev_set_id(DeviceState *dev, char *id, Error **errp) 595 { 596 ObjectProperty *prop; 597 598 assert(!dev->id && !dev->realized); 599 600 /* 601 * object_property_[try_]add_child() below will assert the device 602 * has no parent 603 */ 604 if (id) { 605 prop = object_property_try_add_child(qdev_get_peripheral(), id, 606 OBJECT(dev), NULL); 607 if (prop) { 608 dev->id = id; 609 } else { 610 error_setg(errp, "Duplicate device ID '%s'", id); 611 g_free(id); 612 return NULL; 613 } 614 } else { 615 static int anon_count; 616 gchar *name = g_strdup_printf("device[%d]", anon_count++); 617 prop = object_property_add_child(qdev_get_peripheral_anon(), name, 618 OBJECT(dev)); 619 g_free(name); 620 } 621 622 return prop->name; 623 } 624 625 DeviceState *qdev_device_add_from_qdict(const QDict *opts, 626 bool from_json, Error **errp) 627 { 628 ERRP_GUARD(); 629 DeviceClass *dc; 630 const char *driver, *path; 631 char *id; 632 DeviceState *dev = NULL; 633 BusState *bus = NULL; 634 635 driver = qdict_get_try_str(opts, "driver"); 636 if (!driver) { 637 error_setg(errp, QERR_MISSING_PARAMETER, "driver"); 638 return NULL; 639 } 640 641 /* find driver */ 642 dc = qdev_get_device_class(&driver, errp); 643 if (!dc) { 644 return NULL; 645 } 646 647 /* find bus */ 648 path = qdict_get_try_str(opts, "bus"); 649 if (path != NULL) { 650 bus = qbus_find(path, errp); 651 if (!bus) { 652 return NULL; 653 } 654 if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) { 655 error_setg(errp, "Device '%s' can't go on %s bus", 656 driver, object_get_typename(OBJECT(bus))); 657 return NULL; 658 } 659 } else if (dc->bus_type != NULL) { 660 bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type); 661 if (!bus || qbus_is_full(bus)) { 662 error_setg(errp, "No '%s' bus found for device '%s'", 663 dc->bus_type, driver); 664 return NULL; 665 } 666 } 667 668 if (qdev_should_hide_device(opts, from_json, errp)) { 669 if (bus && !qbus_is_hotpluggable(bus)) { 670 error_setg(errp, "Bus '%s' does not support hotplugging", 671 bus->name); 672 } 673 return NULL; 674 } else if (*errp) { 675 return NULL; 676 } 677 678 if (phase_check(PHASE_MACHINE_READY) && bus && !qbus_is_hotpluggable(bus)) { 679 error_setg(errp, "Bus '%s' does not support hotplugging", bus->name); 680 return NULL; 681 } 682 683 if (migration_is_running()) { 684 error_setg(errp, "device_add not allowed while migrating"); 685 return NULL; 686 } 687 688 /* create device */ 689 dev = qdev_new(driver); 690 691 /* Check whether the hotplug is allowed by the machine */ 692 if (phase_check(PHASE_MACHINE_READY)) { 693 if (!qdev_hotplug_allowed(dev, errp)) { 694 goto err_del_dev; 695 } 696 697 if (!bus && !qdev_get_machine_hotplug_handler(dev)) { 698 /* No bus, no machine hotplug handler --> device is not hotpluggable */ 699 error_setg(errp, "Device '%s' can not be hotplugged on this machine", 700 driver); 701 goto err_del_dev; 702 } 703 } 704 705 /* 706 * set dev's parent and register its id. 707 * If it fails it means the id is already taken. 708 */ 709 id = g_strdup(qdict_get_try_str(opts, "id")); 710 if (!qdev_set_id(dev, id, errp)) { 711 goto err_del_dev; 712 } 713 714 /* set properties */ 715 dev->opts = qdict_clone_shallow(opts); 716 qdict_del(dev->opts, "driver"); 717 qdict_del(dev->opts, "bus"); 718 qdict_del(dev->opts, "id"); 719 720 object_set_properties_from_keyval(&dev->parent_obj, dev->opts, from_json, 721 errp); 722 if (*errp) { 723 goto err_del_dev; 724 } 725 726 if (!qdev_realize(dev, bus, errp)) { 727 goto err_del_dev; 728 } 729 return dev; 730 731 err_del_dev: 732 if (dev) { 733 object_unparent(OBJECT(dev)); 734 object_unref(OBJECT(dev)); 735 } 736 return NULL; 737 } 738 739 /* Takes ownership of @opts on success */ 740 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp) 741 { 742 QDict *qdict = qemu_opts_to_qdict(opts, NULL); 743 DeviceState *ret; 744 745 ret = qdev_device_add_from_qdict(qdict, false, errp); 746 if (ret) { 747 qemu_opts_del(opts); 748 } 749 qobject_unref(qdict); 750 return ret; 751 } 752 753 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__) 754 755 static void qdev_print_props(Monitor *mon, DeviceState *dev, DeviceClass *dc, 756 int indent) 757 { 758 for (int i = 0, n = dc->props_count_; i < n; ++i) { 759 const Property *prop = &dc->props_[i]; 760 char *value; 761 char *legacy_name = g_strdup_printf("legacy-%s", prop->name); 762 763 if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) { 764 value = object_property_get_str(OBJECT(dev), legacy_name, NULL); 765 } else { 766 value = object_property_print(OBJECT(dev), prop->name, true, 767 NULL); 768 } 769 g_free(legacy_name); 770 771 if (!value) { 772 continue; 773 } 774 qdev_printf("%s = %s\n", prop->name, 775 *value ? value : "<null>"); 776 g_free(value); 777 } 778 } 779 780 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent) 781 { 782 BusClass *bc = BUS_GET_CLASS(bus); 783 784 if (bc->print_dev) { 785 bc->print_dev(mon, dev, indent); 786 } 787 } 788 789 static void qdev_print(Monitor *mon, DeviceState *dev, int indent) 790 { 791 ObjectClass *class; 792 NamedGPIOList *ngl; 793 NamedClockList *ncl; 794 795 QLIST_FOREACH(ngl, &dev->gpios, node) { 796 if (ngl->num_in) { 797 qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "", 798 ngl->num_in); 799 } 800 if (ngl->num_out) { 801 qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "", 802 ngl->num_out); 803 } 804 } 805 QLIST_FOREACH(ncl, &dev->clocks, node) { 806 g_autofree char *freq_str = clock_display_freq(ncl->clock); 807 qdev_printf("clock-%s%s \"%s\" freq_hz=%s\n", 808 ncl->output ? "out" : "in", 809 ncl->alias ? " (alias)" : "", 810 ncl->name, freq_str); 811 } 812 class = object_get_class(OBJECT(dev)); 813 do { 814 qdev_print_props(mon, dev, DEVICE_CLASS(class), indent); 815 class = object_class_get_parent(class); 816 } while (class != object_class_by_name(TYPE_DEVICE)); 817 bus_print_dev(dev->parent_bus, mon, dev, indent); 818 } 819 820 static void qbus_print(Monitor *mon, BusState *bus, int indent, bool details) 821 { 822 BusChild *kid; 823 824 qdev_printf("bus: %s\n", bus->name); 825 indent += 2; 826 qdev_printf("type %s\n", object_get_typename(OBJECT(bus))); 827 QTAILQ_FOREACH(kid, &bus->children, sibling) { 828 BusState *child_bus; 829 DeviceState *dev = kid->child; 830 qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)), 831 dev->id ? dev->id : ""); 832 if (details) { 833 qdev_print(mon, dev, indent + 2); 834 } 835 QLIST_FOREACH(child_bus, &dev->child_bus, sibling) { 836 qbus_print(mon, child_bus, indent + 2, details); 837 } 838 } 839 } 840 #undef qdev_printf 841 842 void hmp_info_qtree(Monitor *mon, const QDict *qdict) 843 { 844 bool details = !qdict_get_try_bool(qdict, "brief", false); 845 846 if (sysbus_get_default()) { 847 qbus_print(mon, sysbus_get_default(), 0, details); 848 } 849 } 850 851 void hmp_info_qdm(Monitor *mon, const QDict *qdict) 852 { 853 qdev_print_devinfos(true); 854 } 855 856 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp) 857 { 858 DeviceState *dev; 859 860 dev = qdev_device_add_from_qdict(qdict, true, errp); 861 if (!dev) { 862 /* 863 * Drain all pending RCU callbacks. This is done because 864 * some bus related operations can delay a device removal 865 * (in this case this can happen if device is added and then 866 * removed due to a configuration error) 867 * to a RCU callback, but user might expect that this interface 868 * will finish its job completely once qmp command returns result 869 * to the user 870 */ 871 drain_call_rcu(); 872 } 873 object_unref(OBJECT(dev)); 874 } 875 876 /* 877 * Note that creating new APIs using error classes other than GenericError is 878 * not recommended. Set use_generic_error=true for new interfaces. 879 */ 880 static DeviceState *find_device_state(const char *id, bool use_generic_error, 881 Error **errp) 882 { 883 Object *obj = object_resolve_path_at(qdev_get_peripheral(), id); 884 DeviceState *dev; 885 886 if (!obj) { 887 error_set(errp, 888 (use_generic_error ? 889 ERROR_CLASS_GENERIC_ERROR : ERROR_CLASS_DEVICE_NOT_FOUND), 890 "Device '%s' not found", id); 891 return NULL; 892 } 893 894 dev = (DeviceState *)object_dynamic_cast(obj, TYPE_DEVICE); 895 if (!dev) { 896 error_setg(errp, "%s is not a device", id); 897 return NULL; 898 } 899 900 return dev; 901 } 902 903 void qdev_unplug(DeviceState *dev, Error **errp) 904 { 905 DeviceClass *dc = DEVICE_GET_CLASS(dev); 906 HotplugHandler *hotplug_ctrl; 907 HotplugHandlerClass *hdc; 908 Error *local_err = NULL; 909 910 if (qdev_unplug_blocked(dev, errp)) { 911 return; 912 } 913 914 if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) { 915 error_setg(errp, "Bus '%s' does not support hotplugging", 916 dev->parent_bus->name); 917 return; 918 } 919 920 if (!dc->hotpluggable) { 921 error_setg(errp, "Device '%s' does not support hotplugging", 922 object_get_typename(OBJECT(dev))); 923 return; 924 } 925 926 if (migration_is_running() && !dev->allow_unplug_during_migration) { 927 error_setg(errp, "device_del not allowed while migrating"); 928 return; 929 } 930 931 qdev_hot_removed = true; 932 933 hotplug_ctrl = qdev_get_hotplug_handler(dev); 934 /* hotpluggable device MUST have HotplugHandler, if it doesn't 935 * then something is very wrong with it */ 936 g_assert(hotplug_ctrl); 937 938 /* If device supports async unplug just request it to be done, 939 * otherwise just remove it synchronously */ 940 hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl); 941 if (hdc->unplug_request) { 942 hotplug_handler_unplug_request(hotplug_ctrl, dev, &local_err); 943 } else { 944 hotplug_handler_unplug(hotplug_ctrl, dev, &local_err); 945 if (!local_err) { 946 object_unparent(OBJECT(dev)); 947 } 948 } 949 error_propagate(errp, local_err); 950 } 951 952 void qmp_device_del(const char *id, Error **errp) 953 { 954 DeviceState *dev = find_device_state(id, false, errp); 955 if (dev != NULL) { 956 if (dev->pending_deleted_event && 957 (dev->pending_deleted_expires_ms == 0 || 958 dev->pending_deleted_expires_ms > qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL))) { 959 error_setg(errp, "Device %s is already in the " 960 "process of unplug", id); 961 return; 962 } 963 964 qdev_unplug(dev, errp); 965 } 966 } 967 968 int qdev_sync_config(DeviceState *dev, Error **errp) 969 { 970 DeviceClass *dc = DEVICE_GET_CLASS(dev); 971 972 if (!dc->sync_config) { 973 error_setg(errp, "device-sync-config is not supported for '%s'", 974 object_get_typename(OBJECT(dev))); 975 return -ENOTSUP; 976 } 977 978 return dc->sync_config(dev, errp); 979 } 980 981 void qmp_device_sync_config(const char *id, Error **errp) 982 { 983 DeviceState *dev; 984 985 /* 986 * During migration there is a race between syncing`configuration 987 * and migrating it (if migrate first, that target would get 988 * outdated version), so let's just not allow it. 989 */ 990 991 if (migration_is_running()) { 992 error_setg(errp, "Config synchronization is not allowed " 993 "during migration"); 994 return; 995 } 996 997 dev = find_device_state(id, true, errp); 998 if (!dev) { 999 return; 1000 } 1001 1002 qdev_sync_config(dev, errp); 1003 } 1004 1005 void hmp_device_add(Monitor *mon, const QDict *qdict) 1006 { 1007 Error *err = NULL; 1008 QemuOpts *opts; 1009 DeviceState *dev; 1010 1011 opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &err); 1012 if (!opts) { 1013 goto out; 1014 } 1015 if (qdev_device_help(opts)) { 1016 qemu_opts_del(opts); 1017 return; 1018 } 1019 dev = qdev_device_add(opts, &err); 1020 if (!dev) { 1021 /* 1022 * Drain all pending RCU callbacks. This is done because 1023 * some bus related operations can delay a device removal 1024 * (in this case this can happen if device is added and then 1025 * removed due to a configuration error) 1026 * to a RCU callback, but user might expect that this interface 1027 * will finish its job completely once qmp command returns result 1028 * to the user 1029 */ 1030 drain_call_rcu(); 1031 1032 qemu_opts_del(opts); 1033 } 1034 object_unref(dev); 1035 out: 1036 hmp_handle_error(mon, err); 1037 } 1038 1039 void hmp_device_del(Monitor *mon, const QDict *qdict) 1040 { 1041 const char *id = qdict_get_str(qdict, "id"); 1042 Error *err = NULL; 1043 1044 qmp_device_del(id, &err); 1045 hmp_handle_error(mon, err); 1046 } 1047 1048 void device_add_completion(ReadLineState *rs, int nb_args, const char *str) 1049 { 1050 GSList *list, *elt; 1051 size_t len; 1052 1053 if (nb_args != 2) { 1054 return; 1055 } 1056 1057 len = strlen(str); 1058 readline_set_completion_index(rs, len); 1059 list = elt = object_class_get_list(TYPE_DEVICE, false); 1060 while (elt) { 1061 DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data, 1062 TYPE_DEVICE); 1063 1064 if (dc->user_creatable) { 1065 readline_add_completion_of(rs, str, 1066 object_class_get_name(OBJECT_CLASS(dc))); 1067 } 1068 elt = elt->next; 1069 } 1070 g_slist_free(list); 1071 } 1072 1073 static int qdev_add_hotpluggable_device(Object *obj, void *opaque) 1074 { 1075 GSList **list = opaque; 1076 DeviceState *dev = (DeviceState *)object_dynamic_cast(obj, TYPE_DEVICE); 1077 1078 if (dev == NULL) { 1079 return 0; 1080 } 1081 1082 if (dev->realized && object_property_get_bool(obj, "hotpluggable", NULL)) { 1083 *list = g_slist_append(*list, dev); 1084 } 1085 1086 return 0; 1087 } 1088 1089 static GSList *qdev_build_hotpluggable_device_list(Object *peripheral) 1090 { 1091 GSList *list = NULL; 1092 1093 object_child_foreach(peripheral, qdev_add_hotpluggable_device, &list); 1094 1095 return list; 1096 } 1097 1098 static void peripheral_device_del_completion(ReadLineState *rs, 1099 const char *str) 1100 { 1101 Object *peripheral = container_get(qdev_get_machine(), "/peripheral"); 1102 GSList *list, *item; 1103 1104 list = qdev_build_hotpluggable_device_list(peripheral); 1105 if (!list) { 1106 return; 1107 } 1108 1109 for (item = list; item; item = g_slist_next(item)) { 1110 DeviceState *dev = item->data; 1111 1112 if (dev->id) { 1113 readline_add_completion_of(rs, str, dev->id); 1114 } 1115 } 1116 1117 g_slist_free(list); 1118 } 1119 1120 void device_del_completion(ReadLineState *rs, int nb_args, const char *str) 1121 { 1122 if (nb_args != 2) { 1123 return; 1124 } 1125 1126 readline_set_completion_index(rs, strlen(str)); 1127 peripheral_device_del_completion(rs, str); 1128 } 1129 1130 BlockBackend *blk_by_qdev_id(const char *id, Error **errp) 1131 { 1132 DeviceState *dev; 1133 BlockBackend *blk; 1134 1135 GLOBAL_STATE_CODE(); 1136 1137 dev = find_device_state(id, false, errp); 1138 if (dev == NULL) { 1139 return NULL; 1140 } 1141 1142 blk = blk_by_dev(dev); 1143 if (!blk) { 1144 error_setg(errp, "Device does not have a block device backend"); 1145 } 1146 return blk; 1147 } 1148 1149 QemuOptsList qemu_device_opts = { 1150 .name = "device", 1151 .implied_opt_name = "driver", 1152 .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head), 1153 .desc = { 1154 /* 1155 * no elements => accept any 1156 * sanity checking will happen later 1157 * when setting device properties 1158 */ 1159 { /* end of list */ } 1160 }, 1161 }; 1162 1163 QemuOptsList qemu_global_opts = { 1164 .name = "global", 1165 .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head), 1166 .desc = { 1167 { 1168 .name = "driver", 1169 .type = QEMU_OPT_STRING, 1170 },{ 1171 .name = "property", 1172 .type = QEMU_OPT_STRING, 1173 },{ 1174 .name = "value", 1175 .type = QEMU_OPT_STRING, 1176 }, 1177 { /* end of list */ } 1178 }, 1179 }; 1180 1181 int qemu_global_option(const char *str) 1182 { 1183 char driver[64], property[64]; 1184 QemuOpts *opts; 1185 int rc, offset; 1186 1187 rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset); 1188 if (rc == 2 && str[offset] == '=') { 1189 opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort); 1190 qemu_opt_set(opts, "driver", driver, &error_abort); 1191 qemu_opt_set(opts, "property", property, &error_abort); 1192 qemu_opt_set(opts, "value", str + offset + 1, &error_abort); 1193 return 0; 1194 } 1195 1196 opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false); 1197 if (!opts) { 1198 return -1; 1199 } 1200 if (!qemu_opt_get(opts, "driver") 1201 || !qemu_opt_get(opts, "property") 1202 || !qemu_opt_get(opts, "value")) { 1203 error_report("options 'driver', 'property', and 'value'" 1204 " are required"); 1205 return -1; 1206 } 1207 1208 return 0; 1209 } 1210 1211 bool qmp_command_available(const QmpCommand *cmd, Error **errp) 1212 { 1213 if (!phase_check(PHASE_MACHINE_READY) && 1214 !(cmd->options & QCO_ALLOW_PRECONFIG)) { 1215 error_setg(errp, "The command '%s' is permitted only after machine initialization has completed", 1216 cmd->name); 1217 return false; 1218 } 1219 return true; 1220 } 1221