qdev-monitor.c (31835B)
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 "sysemu/arch_init.h" 26 #include "qapi/error.h" 27 #include "qapi/qapi-commands-qdev.h" 28 #include "qapi/qmp/dispatch.h" 29 #include "qapi/qmp/qdict.h" 30 #include "qapi/qmp/qerror.h" 31 #include "qapi/qmp/qstring.h" 32 #include "qapi/qobject-input-visitor.h" 33 #include "qemu/config-file.h" 34 #include "qemu/error-report.h" 35 #include "qemu/help_option.h" 36 #include "qemu/option.h" 37 #include "qemu/qemu-print.h" 38 #include "qemu/option_int.h" 39 #include "sysemu/block-backend.h" 40 #include "migration/misc.h" 41 #include "migration/migration.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 | QEMU_ARCH_ARM | \ 60 QEMU_ARCH_HPPA | QEMU_ARCH_I386 | \ 61 QEMU_ARCH_MIPS | QEMU_ARCH_PPC | \ 62 QEMU_ARCH_RISCV | QEMU_ARCH_SH4 | \ 63 QEMU_ARCH_SPARC | QEMU_ARCH_XTENSA | \ 64 QEMU_ARCH_LOONGARCH) 65 #define QEMU_ARCH_VIRTIO_CCW (QEMU_ARCH_S390X) 66 #define QEMU_ARCH_VIRTIO_MMIO (QEMU_ARCH_M68K) 67 68 /* Please keep this table sorted by typename. */ 69 static const QDevAlias qdev_alias_table[] = { 70 { "AC97", "ac97" }, /* -soundhw name */ 71 { "e1000", "e1000-82540em" }, 72 { "ES1370", "es1370" }, /* -soundhw name */ 73 { "ich9-ahci", "ahci" }, 74 { "lsi53c895a", "lsi" }, 75 { "virtio-9p-device", "virtio-9p", QEMU_ARCH_VIRTIO_MMIO }, 76 { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_VIRTIO_CCW }, 77 { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_VIRTIO_PCI }, 78 { "virtio-balloon-device", "virtio-balloon", QEMU_ARCH_VIRTIO_MMIO }, 79 { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_VIRTIO_CCW }, 80 { "virtio-balloon-pci", "virtio-balloon", QEMU_ARCH_VIRTIO_PCI }, 81 { "virtio-blk-device", "virtio-blk", QEMU_ARCH_VIRTIO_MMIO }, 82 { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_VIRTIO_CCW }, 83 { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_VIRTIO_PCI }, 84 { "virtio-gpu-device", "virtio-gpu", QEMU_ARCH_VIRTIO_MMIO }, 85 { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_VIRTIO_CCW }, 86 { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_VIRTIO_PCI }, 87 { "virtio-gpu-gl-device", "virtio-gpu-gl", QEMU_ARCH_VIRTIO_MMIO }, 88 { "virtio-gpu-gl-pci", "virtio-gpu-gl", QEMU_ARCH_VIRTIO_PCI }, 89 { "virtio-input-host-device", "virtio-input-host", QEMU_ARCH_VIRTIO_MMIO }, 90 { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_VIRTIO_CCW }, 91 { "virtio-input-host-pci", "virtio-input-host", QEMU_ARCH_VIRTIO_PCI }, 92 { "virtio-iommu-pci", "virtio-iommu", QEMU_ARCH_VIRTIO_PCI }, 93 { "virtio-keyboard-device", "virtio-keyboard", QEMU_ARCH_VIRTIO_MMIO }, 94 { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_VIRTIO_CCW }, 95 { "virtio-keyboard-pci", "virtio-keyboard", QEMU_ARCH_VIRTIO_PCI }, 96 { "virtio-mouse-device", "virtio-mouse", QEMU_ARCH_VIRTIO_MMIO }, 97 { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_VIRTIO_CCW }, 98 { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_VIRTIO_PCI }, 99 { "virtio-net-device", "virtio-net", QEMU_ARCH_VIRTIO_MMIO }, 100 { "virtio-net-ccw", "virtio-net", QEMU_ARCH_VIRTIO_CCW }, 101 { "virtio-net-pci", "virtio-net", QEMU_ARCH_VIRTIO_PCI }, 102 { "virtio-rng-device", "virtio-rng", QEMU_ARCH_VIRTIO_MMIO }, 103 { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_VIRTIO_CCW }, 104 { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_VIRTIO_PCI }, 105 { "virtio-scsi-device", "virtio-scsi", QEMU_ARCH_VIRTIO_MMIO }, 106 { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_VIRTIO_CCW }, 107 { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_VIRTIO_PCI }, 108 { "virtio-serial-device", "virtio-serial", QEMU_ARCH_VIRTIO_MMIO }, 109 { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_VIRTIO_CCW }, 110 { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_VIRTIO_PCI}, 111 { "virtio-tablet-device", "virtio-tablet", QEMU_ARCH_VIRTIO_MMIO }, 112 { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_VIRTIO_CCW }, 113 { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_VIRTIO_PCI }, 114 { } 115 }; 116 117 static const char *qdev_class_get_alias(DeviceClass *dc) 118 { 119 const char *typename = object_class_get_name(OBJECT_CLASS(dc)); 120 int i; 121 122 for (i = 0; qdev_alias_table[i].typename; i++) { 123 if (qdev_alias_table[i].arch_mask && 124 !(qdev_alias_table[i].arch_mask & arch_type)) { 125 continue; 126 } 127 128 if (strcmp(qdev_alias_table[i].typename, typename) == 0) { 129 return qdev_alias_table[i].alias; 130 } 131 } 132 133 return NULL; 134 } 135 136 static bool qdev_class_has_alias(DeviceClass *dc) 137 { 138 return (qdev_class_get_alias(dc) != NULL); 139 } 140 141 static void qdev_print_devinfo(DeviceClass *dc) 142 { 143 qemu_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc))); 144 if (dc->bus_type) { 145 qemu_printf(", bus %s", dc->bus_type); 146 } 147 if (qdev_class_has_alias(dc)) { 148 qemu_printf(", alias \"%s\"", qdev_class_get_alias(dc)); 149 } 150 if (dc->desc) { 151 qemu_printf(", desc \"%s\"", dc->desc); 152 } 153 if (!dc->user_creatable) { 154 qemu_printf(", no-user"); 155 } 156 qemu_printf("\n"); 157 } 158 159 static void qdev_print_devinfos(bool show_no_user) 160 { 161 static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = { 162 [DEVICE_CATEGORY_BRIDGE] = "Controller/Bridge/Hub", 163 [DEVICE_CATEGORY_USB] = "USB", 164 [DEVICE_CATEGORY_STORAGE] = "Storage", 165 [DEVICE_CATEGORY_NETWORK] = "Network", 166 [DEVICE_CATEGORY_INPUT] = "Input", 167 [DEVICE_CATEGORY_DISPLAY] = "Display", 168 [DEVICE_CATEGORY_SOUND] = "Sound", 169 [DEVICE_CATEGORY_MISC] = "Misc", 170 [DEVICE_CATEGORY_CPU] = "CPU", 171 [DEVICE_CATEGORY_WATCHDOG]= "Watchdog", 172 [DEVICE_CATEGORY_MAX] = "Uncategorized", 173 }; 174 GSList *list, *elt; 175 int i; 176 bool cat_printed; 177 178 module_load_qom_all(); 179 list = object_class_get_list_sorted(TYPE_DEVICE, false); 180 181 for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) { 182 cat_printed = false; 183 for (elt = list; elt; elt = elt->next) { 184 DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data, 185 TYPE_DEVICE); 186 if ((i < DEVICE_CATEGORY_MAX 187 ? !test_bit(i, dc->categories) 188 : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX)) 189 || (!show_no_user 190 && !dc->user_creatable)) { 191 continue; 192 } 193 if (!cat_printed) { 194 qemu_printf("%s%s devices:\n", i ? "\n" : "", cat_name[i]); 195 cat_printed = true; 196 } 197 qdev_print_devinfo(dc); 198 } 199 } 200 201 g_slist_free(list); 202 } 203 204 static const char *find_typename_by_alias(const char *alias) 205 { 206 int i; 207 208 for (i = 0; qdev_alias_table[i].alias; i++) { 209 if (qdev_alias_table[i].arch_mask && 210 !(qdev_alias_table[i].arch_mask & arch_type)) { 211 continue; 212 } 213 214 if (strcmp(qdev_alias_table[i].alias, alias) == 0) { 215 return qdev_alias_table[i].typename; 216 } 217 } 218 219 return NULL; 220 } 221 222 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp) 223 { 224 ObjectClass *oc; 225 DeviceClass *dc; 226 const char *original_name = *driver; 227 228 oc = module_object_class_by_name(*driver); 229 if (!oc) { 230 const char *typename = find_typename_by_alias(*driver); 231 232 if (typename) { 233 *driver = typename; 234 oc = module_object_class_by_name(*driver); 235 } 236 } 237 238 if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) { 239 if (*driver != original_name) { 240 error_setg(errp, "'%s' (alias '%s') is not a valid device model" 241 " name", original_name, *driver); 242 } else { 243 error_setg(errp, "'%s' is not a valid device model name", *driver); 244 } 245 return NULL; 246 } 247 248 if (object_class_is_abstract(oc)) { 249 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver", 250 "a non-abstract device type"); 251 return NULL; 252 } 253 254 dc = DEVICE_CLASS(oc); 255 if (!dc->user_creatable || 256 (phase_check(PHASE_MACHINE_READY) && !dc->hotpluggable)) { 257 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver", 258 "a pluggable device type"); 259 return NULL; 260 } 261 262 if (object_class_dynamic_cast(oc, TYPE_SYS_BUS_DEVICE)) { 263 /* sysbus devices need to be allowed by the machine */ 264 MachineClass *mc = MACHINE_CLASS(object_get_class(qdev_get_machine())); 265 if (!device_type_is_dynamic_sysbus(mc, *driver)) { 266 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver", 267 "a dynamic sysbus device type for the machine"); 268 return NULL; 269 } 270 } 271 272 return dc; 273 } 274 275 276 int qdev_device_help(QemuOpts *opts) 277 { 278 Error *local_err = NULL; 279 const char *driver; 280 ObjectPropertyInfoList *prop_list; 281 ObjectPropertyInfoList *prop; 282 GPtrArray *array; 283 int i; 284 285 driver = qemu_opt_get(opts, "driver"); 286 if (driver && is_help_option(driver)) { 287 qdev_print_devinfos(false); 288 return 1; 289 } 290 291 if (!driver || !qemu_opt_has_help_opt(opts)) { 292 return 0; 293 } 294 295 if (!object_class_by_name(driver)) { 296 const char *typename = find_typename_by_alias(driver); 297 298 if (typename) { 299 driver = typename; 300 } 301 } 302 303 prop_list = qmp_device_list_properties(driver, &local_err); 304 if (local_err) { 305 goto error; 306 } 307 308 if (prop_list) { 309 qemu_printf("%s options:\n", driver); 310 } else { 311 qemu_printf("There are no options for %s.\n", driver); 312 } 313 array = g_ptr_array_new(); 314 for (prop = prop_list; prop; prop = prop->next) { 315 g_ptr_array_add(array, 316 object_property_help(prop->value->name, 317 prop->value->type, 318 prop->value->default_value, 319 prop->value->description)); 320 } 321 g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0); 322 for (i = 0; i < array->len; i++) { 323 qemu_printf("%s\n", (char *)array->pdata[i]); 324 } 325 g_ptr_array_set_free_func(array, g_free); 326 g_ptr_array_free(array, true); 327 qapi_free_ObjectPropertyInfoList(prop_list); 328 return 1; 329 330 error: 331 error_report_err(local_err); 332 return 1; 333 } 334 335 static Object *qdev_get_peripheral(void) 336 { 337 static Object *dev; 338 339 if (dev == NULL) { 340 dev = container_get(qdev_get_machine(), "/peripheral"); 341 } 342 343 return dev; 344 } 345 346 static Object *qdev_get_peripheral_anon(void) 347 { 348 static Object *dev; 349 350 if (dev == NULL) { 351 dev = container_get(qdev_get_machine(), "/peripheral-anon"); 352 } 353 354 return dev; 355 } 356 357 static void qbus_error_append_bus_list_hint(DeviceState *dev, 358 Error *const *errp) 359 { 360 BusState *child; 361 const char *sep = " "; 362 363 error_append_hint(errp, "child buses at \"%s\":", 364 dev->id ? dev->id : object_get_typename(OBJECT(dev))); 365 QLIST_FOREACH(child, &dev->child_bus, sibling) { 366 error_append_hint(errp, "%s\"%s\"", sep, child->name); 367 sep = ", "; 368 } 369 error_append_hint(errp, "\n"); 370 } 371 372 static void qbus_error_append_dev_list_hint(BusState *bus, 373 Error *const *errp) 374 { 375 BusChild *kid; 376 const char *sep = " "; 377 378 error_append_hint(errp, "devices at \"%s\":", bus->name); 379 QTAILQ_FOREACH(kid, &bus->children, sibling) { 380 DeviceState *dev = kid->child; 381 error_append_hint(errp, "%s\"%s\"", sep, 382 object_get_typename(OBJECT(dev))); 383 if (dev->id) { 384 error_append_hint(errp, "/\"%s\"", dev->id); 385 } 386 sep = ", "; 387 } 388 error_append_hint(errp, "\n"); 389 } 390 391 static BusState *qbus_find_bus(DeviceState *dev, char *elem) 392 { 393 BusState *child; 394 395 QLIST_FOREACH(child, &dev->child_bus, sibling) { 396 if (strcmp(child->name, elem) == 0) { 397 return child; 398 } 399 } 400 return NULL; 401 } 402 403 static DeviceState *qbus_find_dev(BusState *bus, char *elem) 404 { 405 BusChild *kid; 406 407 /* 408 * try to match in order: 409 * (1) instance id, if present 410 * (2) driver name 411 * (3) driver alias, if present 412 */ 413 QTAILQ_FOREACH(kid, &bus->children, sibling) { 414 DeviceState *dev = kid->child; 415 if (dev->id && strcmp(dev->id, elem) == 0) { 416 return dev; 417 } 418 } 419 QTAILQ_FOREACH(kid, &bus->children, sibling) { 420 DeviceState *dev = kid->child; 421 if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) { 422 return dev; 423 } 424 } 425 QTAILQ_FOREACH(kid, &bus->children, sibling) { 426 DeviceState *dev = kid->child; 427 DeviceClass *dc = DEVICE_GET_CLASS(dev); 428 429 if (qdev_class_has_alias(dc) && 430 strcmp(qdev_class_get_alias(dc), elem) == 0) { 431 return dev; 432 } 433 } 434 return NULL; 435 } 436 437 static inline bool qbus_is_full(BusState *bus) 438 { 439 BusClass *bus_class; 440 441 if (bus->full) { 442 return true; 443 } 444 bus_class = BUS_GET_CLASS(bus); 445 return bus_class->max_dev && bus->num_children >= bus_class->max_dev; 446 } 447 448 /* 449 * Search the tree rooted at @bus for a bus. 450 * If @name, search for a bus with that name. Note that bus names 451 * need not be unique. Yes, that's screwed up. 452 * Else search for a bus that is a subtype of @bus_typename. 453 * If more than one exists, prefer one that can take another device. 454 * Return the bus if found, else %NULL. 455 */ 456 static BusState *qbus_find_recursive(BusState *bus, const char *name, 457 const char *bus_typename) 458 { 459 BusChild *kid; 460 BusState *pick, *child, *ret; 461 bool match; 462 463 assert(name || bus_typename); 464 if (name) { 465 match = !strcmp(bus->name, name); 466 } else { 467 match = !!object_dynamic_cast(OBJECT(bus), bus_typename); 468 } 469 470 if (match && !qbus_is_full(bus)) { 471 return bus; /* root matches and isn't full */ 472 } 473 474 pick = match ? bus : NULL; 475 476 QTAILQ_FOREACH(kid, &bus->children, sibling) { 477 DeviceState *dev = kid->child; 478 QLIST_FOREACH(child, &dev->child_bus, sibling) { 479 ret = qbus_find_recursive(child, name, bus_typename); 480 if (ret && !qbus_is_full(ret)) { 481 return ret; /* a descendant matches and isn't full */ 482 } 483 if (ret && !pick) { 484 pick = ret; 485 } 486 } 487 } 488 489 /* root or a descendant matches, but is full */ 490 return pick; 491 } 492 493 static BusState *qbus_find(const char *path, Error **errp) 494 { 495 DeviceState *dev; 496 BusState *bus; 497 char elem[128]; 498 int pos, len; 499 500 /* find start element */ 501 if (path[0] == '/') { 502 bus = sysbus_get_default(); 503 pos = 0; 504 } else { 505 if (sscanf(path, "%127[^/]%n", elem, &len) != 1) { 506 assert(!path[0]); 507 elem[0] = len = 0; 508 } 509 bus = qbus_find_recursive(sysbus_get_default(), elem, NULL); 510 if (!bus) { 511 error_setg(errp, "Bus '%s' not found", elem); 512 return NULL; 513 } 514 pos = len; 515 } 516 517 for (;;) { 518 assert(path[pos] == '/' || !path[pos]); 519 while (path[pos] == '/') { 520 pos++; 521 } 522 if (path[pos] == '\0') { 523 break; 524 } 525 526 /* find device */ 527 if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) { 528 g_assert_not_reached(); 529 elem[0] = len = 0; 530 } 531 pos += len; 532 dev = qbus_find_dev(bus, elem); 533 if (!dev) { 534 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 535 "Device '%s' not found", elem); 536 qbus_error_append_dev_list_hint(bus, errp); 537 return NULL; 538 } 539 540 assert(path[pos] == '/' || !path[pos]); 541 while (path[pos] == '/') { 542 pos++; 543 } 544 if (path[pos] == '\0') { 545 /* last specified element is a device. If it has exactly 546 * one child bus accept it nevertheless */ 547 if (dev->num_child_bus == 1) { 548 bus = QLIST_FIRST(&dev->child_bus); 549 break; 550 } 551 if (dev->num_child_bus) { 552 error_setg(errp, "Device '%s' has multiple child buses", 553 elem); 554 qbus_error_append_bus_list_hint(dev, errp); 555 } else { 556 error_setg(errp, "Device '%s' has no child bus", elem); 557 } 558 return NULL; 559 } 560 561 /* find bus */ 562 if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) { 563 g_assert_not_reached(); 564 elem[0] = len = 0; 565 } 566 pos += len; 567 bus = qbus_find_bus(dev, elem); 568 if (!bus) { 569 error_setg(errp, "Bus '%s' not found", elem); 570 qbus_error_append_bus_list_hint(dev, errp); 571 return NULL; 572 } 573 } 574 575 if (qbus_is_full(bus)) { 576 error_setg(errp, "Bus '%s' is full", path); 577 return NULL; 578 } 579 return bus; 580 } 581 582 /* Takes ownership of @id, will be freed when deleting the device */ 583 const char *qdev_set_id(DeviceState *dev, char *id, Error **errp) 584 { 585 ObjectProperty *prop; 586 587 assert(!dev->id && !dev->realized); 588 589 /* 590 * object_property_[try_]add_child() below will assert the device 591 * has no parent 592 */ 593 if (id) { 594 prop = object_property_try_add_child(qdev_get_peripheral(), id, 595 OBJECT(dev), NULL); 596 if (prop) { 597 dev->id = id; 598 } else { 599 error_setg(errp, "Duplicate device ID '%s'", id); 600 g_free(id); 601 return NULL; 602 } 603 } else { 604 static int anon_count; 605 gchar *name = g_strdup_printf("device[%d]", anon_count++); 606 prop = object_property_add_child(qdev_get_peripheral_anon(), name, 607 OBJECT(dev)); 608 g_free(name); 609 } 610 611 return prop->name; 612 } 613 614 DeviceState *qdev_device_add_from_qdict(const QDict *opts, 615 bool from_json, Error **errp) 616 { 617 ERRP_GUARD(); 618 DeviceClass *dc; 619 const char *driver, *path; 620 char *id; 621 DeviceState *dev = NULL; 622 BusState *bus = NULL; 623 624 driver = qdict_get_try_str(opts, "driver"); 625 if (!driver) { 626 error_setg(errp, QERR_MISSING_PARAMETER, "driver"); 627 return NULL; 628 } 629 630 /* find driver */ 631 dc = qdev_get_device_class(&driver, errp); 632 if (!dc) { 633 return NULL; 634 } 635 636 /* find bus */ 637 path = qdict_get_try_str(opts, "bus"); 638 if (path != NULL) { 639 bus = qbus_find(path, errp); 640 if (!bus) { 641 return NULL; 642 } 643 if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) { 644 error_setg(errp, "Device '%s' can't go on %s bus", 645 driver, object_get_typename(OBJECT(bus))); 646 return NULL; 647 } 648 } else if (dc->bus_type != NULL) { 649 bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type); 650 if (!bus || qbus_is_full(bus)) { 651 error_setg(errp, "No '%s' bus found for device '%s'", 652 dc->bus_type, driver); 653 return NULL; 654 } 655 } 656 657 if (qdev_should_hide_device(opts, from_json, errp)) { 658 if (bus && !qbus_is_hotpluggable(bus)) { 659 error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name); 660 } 661 return NULL; 662 } else if (*errp) { 663 return NULL; 664 } 665 666 if (phase_check(PHASE_MACHINE_READY) && bus && !qbus_is_hotpluggable(bus)) { 667 error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name); 668 return NULL; 669 } 670 671 if (!migration_is_idle()) { 672 error_setg(errp, "device_add not allowed while migrating"); 673 return NULL; 674 } 675 676 /* create device */ 677 dev = qdev_new(driver); 678 679 /* Check whether the hotplug is allowed by the machine */ 680 if (phase_check(PHASE_MACHINE_READY)) { 681 if (!qdev_hotplug_allowed(dev, errp)) { 682 goto err_del_dev; 683 } 684 685 if (!bus && !qdev_get_machine_hotplug_handler(dev)) { 686 /* No bus, no machine hotplug handler --> device is not hotpluggable */ 687 error_setg(errp, "Device '%s' can not be hotplugged on this machine", 688 driver); 689 goto err_del_dev; 690 } 691 } 692 693 /* 694 * set dev's parent and register its id. 695 * If it fails it means the id is already taken. 696 */ 697 id = g_strdup(qdict_get_try_str(opts, "id")); 698 if (!qdev_set_id(dev, id, errp)) { 699 goto err_del_dev; 700 } 701 702 /* set properties */ 703 dev->opts = qdict_clone_shallow(opts); 704 qdict_del(dev->opts, "driver"); 705 qdict_del(dev->opts, "bus"); 706 qdict_del(dev->opts, "id"); 707 708 object_set_properties_from_keyval(&dev->parent_obj, dev->opts, from_json, 709 errp); 710 if (*errp) { 711 goto err_del_dev; 712 } 713 714 if (!qdev_realize(DEVICE(dev), bus, errp)) { 715 goto err_del_dev; 716 } 717 return dev; 718 719 err_del_dev: 720 if (dev) { 721 object_unparent(OBJECT(dev)); 722 object_unref(OBJECT(dev)); 723 } 724 return NULL; 725 } 726 727 /* Takes ownership of @opts on success */ 728 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp) 729 { 730 QDict *qdict = qemu_opts_to_qdict(opts, NULL); 731 DeviceState *ret; 732 733 ret = qdev_device_add_from_qdict(qdict, false, errp); 734 if (ret) { 735 qemu_opts_del(opts); 736 } 737 qobject_unref(qdict); 738 return ret; 739 } 740 741 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__) 742 static void qbus_print(Monitor *mon, BusState *bus, int indent); 743 744 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props, 745 int indent) 746 { 747 if (!props) 748 return; 749 for (; props->name; props++) { 750 char *value; 751 char *legacy_name = g_strdup_printf("legacy-%s", props->name); 752 753 if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) { 754 value = object_property_get_str(OBJECT(dev), legacy_name, NULL); 755 } else { 756 value = object_property_print(OBJECT(dev), props->name, true, 757 NULL); 758 } 759 g_free(legacy_name); 760 761 if (!value) { 762 continue; 763 } 764 qdev_printf("%s = %s\n", props->name, 765 *value ? value : "<null>"); 766 g_free(value); 767 } 768 } 769 770 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent) 771 { 772 BusClass *bc = BUS_GET_CLASS(bus); 773 774 if (bc->print_dev) { 775 bc->print_dev(mon, dev, indent); 776 } 777 } 778 779 static void qdev_print(Monitor *mon, DeviceState *dev, int indent) 780 { 781 ObjectClass *class; 782 BusState *child; 783 NamedGPIOList *ngl; 784 NamedClockList *ncl; 785 786 qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)), 787 dev->id ? dev->id : ""); 788 indent += 2; 789 QLIST_FOREACH(ngl, &dev->gpios, node) { 790 if (ngl->num_in) { 791 qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "", 792 ngl->num_in); 793 } 794 if (ngl->num_out) { 795 qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "", 796 ngl->num_out); 797 } 798 } 799 QLIST_FOREACH(ncl, &dev->clocks, node) { 800 g_autofree char *freq_str = clock_display_freq(ncl->clock); 801 qdev_printf("clock-%s%s \"%s\" freq_hz=%s\n", 802 ncl->output ? "out" : "in", 803 ncl->alias ? " (alias)" : "", 804 ncl->name, freq_str); 805 } 806 class = object_get_class(OBJECT(dev)); 807 do { 808 qdev_print_props(mon, dev, DEVICE_CLASS(class)->props_, indent); 809 class = object_class_get_parent(class); 810 } while (class != object_class_by_name(TYPE_DEVICE)); 811 bus_print_dev(dev->parent_bus, mon, dev, indent); 812 QLIST_FOREACH(child, &dev->child_bus, sibling) { 813 qbus_print(mon, child, indent); 814 } 815 } 816 817 static void qbus_print(Monitor *mon, BusState *bus, int indent) 818 { 819 BusChild *kid; 820 821 qdev_printf("bus: %s\n", bus->name); 822 indent += 2; 823 qdev_printf("type %s\n", object_get_typename(OBJECT(bus))); 824 QTAILQ_FOREACH(kid, &bus->children, sibling) { 825 DeviceState *dev = kid->child; 826 qdev_print(mon, dev, indent); 827 } 828 } 829 #undef qdev_printf 830 831 void hmp_info_qtree(Monitor *mon, const QDict *qdict) 832 { 833 if (sysbus_get_default()) 834 qbus_print(mon, sysbus_get_default(), 0); 835 } 836 837 void hmp_info_qdm(Monitor *mon, const QDict *qdict) 838 { 839 qdev_print_devinfos(true); 840 } 841 842 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp) 843 { 844 QemuOpts *opts; 845 DeviceState *dev; 846 847 opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, errp); 848 if (!opts) { 849 return; 850 } 851 if (!monitor_cur_is_qmp() && qdev_device_help(opts)) { 852 qemu_opts_del(opts); 853 return; 854 } 855 dev = qdev_device_add(opts, errp); 856 857 /* 858 * Drain all pending RCU callbacks. This is done because 859 * some bus related operations can delay a device removal 860 * (in this case this can happen if device is added and then 861 * removed due to a configuration error) 862 * to a RCU callback, but user might expect that this interface 863 * will finish its job completely once qmp command returns result 864 * to the user 865 */ 866 drain_call_rcu(); 867 868 if (!dev) { 869 qemu_opts_del(opts); 870 return; 871 } 872 object_unref(OBJECT(dev)); 873 } 874 875 static DeviceState *find_device_state(const char *id, Error **errp) 876 { 877 Object *obj = object_resolve_path_at(qdev_get_peripheral(), id); 878 DeviceState *dev; 879 880 if (!obj) { 881 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 882 "Device '%s' not found", id); 883 return NULL; 884 } 885 886 dev = (DeviceState *)object_dynamic_cast(obj, TYPE_DEVICE); 887 if (!dev) { 888 error_setg(errp, "%s is not a hotpluggable device", id); 889 return NULL; 890 } 891 892 return dev; 893 } 894 895 void qdev_unplug(DeviceState *dev, Error **errp) 896 { 897 DeviceClass *dc = DEVICE_GET_CLASS(dev); 898 HotplugHandler *hotplug_ctrl; 899 HotplugHandlerClass *hdc; 900 Error *local_err = NULL; 901 902 if (qdev_unplug_blocked(dev, errp)) { 903 return; 904 } 905 906 if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) { 907 error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name); 908 return; 909 } 910 911 if (!dc->hotpluggable) { 912 error_setg(errp, QERR_DEVICE_NO_HOTPLUG, 913 object_get_typename(OBJECT(dev))); 914 return; 915 } 916 917 if (!migration_is_idle() && !dev->allow_unplug_during_migration) { 918 error_setg(errp, "device_del not allowed while migrating"); 919 return; 920 } 921 922 qdev_hot_removed = true; 923 924 hotplug_ctrl = qdev_get_hotplug_handler(dev); 925 /* hotpluggable device MUST have HotplugHandler, if it doesn't 926 * then something is very wrong with it */ 927 g_assert(hotplug_ctrl); 928 929 /* If device supports async unplug just request it to be done, 930 * otherwise just remove it synchronously */ 931 hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl); 932 if (hdc->unplug_request) { 933 hotplug_handler_unplug_request(hotplug_ctrl, dev, &local_err); 934 } else { 935 hotplug_handler_unplug(hotplug_ctrl, dev, &local_err); 936 if (!local_err) { 937 object_unparent(OBJECT(dev)); 938 } 939 } 940 error_propagate(errp, local_err); 941 } 942 943 void qmp_device_del(const char *id, Error **errp) 944 { 945 DeviceState *dev = find_device_state(id, errp); 946 if (dev != NULL) { 947 if (dev->pending_deleted_event && 948 (dev->pending_deleted_expires_ms == 0 || 949 dev->pending_deleted_expires_ms > qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL))) { 950 error_setg(errp, "Device %s is already in the " 951 "process of unplug", id); 952 return; 953 } 954 955 qdev_unplug(dev, errp); 956 } 957 } 958 959 void hmp_device_add(Monitor *mon, const QDict *qdict) 960 { 961 Error *err = NULL; 962 963 qmp_device_add((QDict *)qdict, NULL, &err); 964 hmp_handle_error(mon, err); 965 } 966 967 void hmp_device_del(Monitor *mon, const QDict *qdict) 968 { 969 const char *id = qdict_get_str(qdict, "id"); 970 Error *err = NULL; 971 972 qmp_device_del(id, &err); 973 hmp_handle_error(mon, err); 974 } 975 976 BlockBackend *blk_by_qdev_id(const char *id, Error **errp) 977 { 978 DeviceState *dev; 979 BlockBackend *blk; 980 981 GLOBAL_STATE_CODE(); 982 983 dev = find_device_state(id, errp); 984 if (dev == NULL) { 985 return NULL; 986 } 987 988 blk = blk_by_dev(dev); 989 if (!blk) { 990 error_setg(errp, "Device does not have a block device backend"); 991 } 992 return blk; 993 } 994 995 QemuOptsList qemu_device_opts = { 996 .name = "device", 997 .implied_opt_name = "driver", 998 .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head), 999 .desc = { 1000 /* 1001 * no elements => accept any 1002 * sanity checking will happen later 1003 * when setting device properties 1004 */ 1005 { /* end of list */ } 1006 }, 1007 }; 1008 1009 QemuOptsList qemu_global_opts = { 1010 .name = "global", 1011 .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head), 1012 .desc = { 1013 { 1014 .name = "driver", 1015 .type = QEMU_OPT_STRING, 1016 },{ 1017 .name = "property", 1018 .type = QEMU_OPT_STRING, 1019 },{ 1020 .name = "value", 1021 .type = QEMU_OPT_STRING, 1022 }, 1023 { /* end of list */ } 1024 }, 1025 }; 1026 1027 int qemu_global_option(const char *str) 1028 { 1029 char driver[64], property[64]; 1030 QemuOpts *opts; 1031 int rc, offset; 1032 1033 rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset); 1034 if (rc == 2 && str[offset] == '=') { 1035 opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort); 1036 qemu_opt_set(opts, "driver", driver, &error_abort); 1037 qemu_opt_set(opts, "property", property, &error_abort); 1038 qemu_opt_set(opts, "value", str + offset + 1, &error_abort); 1039 return 0; 1040 } 1041 1042 opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false); 1043 if (!opts) { 1044 return -1; 1045 } 1046 if (!qemu_opt_get(opts, "driver") 1047 || !qemu_opt_get(opts, "property") 1048 || !qemu_opt_get(opts, "value")) { 1049 error_report("options 'driver', 'property', and 'value'" 1050 " are required"); 1051 return -1; 1052 } 1053 1054 return 0; 1055 } 1056 1057 bool qmp_command_available(const QmpCommand *cmd, Error **errp) 1058 { 1059 if (!phase_check(PHASE_MACHINE_READY) && 1060 !(cmd->options & QCO_ALLOW_PRECONFIG)) { 1061 error_setg(errp, "The command '%s' is permitted only after machine initialization has completed", 1062 cmd->name); 1063 return false; 1064 } 1065 return true; 1066 }