hw/qdev-monitor.c

   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 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 "qdev.h"
  21 #include "monitor/monitor.h"
  22 #include "qmp-commands.h"
  23 #include "sysemu/arch_init.h"
  24 #include "qemu/config-file.h"
  25
  26 /*
  27  * Aliases were a bad idea from the start.  Let's keep them
  28  * from spreading further.
  29  */
  30 typedef struct QDevAlias
  31 {
  32     const char *typename;
  33     const char *alias;
  34     uint32_t arch_mask;
  35 } QDevAlias;
  36
  37 static const QDevAlias qdev_alias_table[] = {
  38     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  39     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  40     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  41     { "virtio-balloon-pci", "virtio-balloon",
  42             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  43     { "virtio-blk-s390", "virtio-blk", QEMU_ARCH_S390X },
  44     { "virtio-net-s390", "virtio-net", QEMU_ARCH_S390X },
  45     { "virtio-serial-s390", "virtio-serial", QEMU_ARCH_S390X },
  46     { "lsi53c895a", "lsi" },
  47     { "ich9-ahci", "ahci" },
  48     { "kvm-pci-assign", "pci-assign" },
  49     { }
  50 };
  51
  52 static const char *qdev_class_get_alias(DeviceClass *dc)
  53 {
  54     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  55     int i;
  56
  57     for (i = 0; qdev_alias_table[i].typename; i++) {
  58         if (qdev_alias_table[i].arch_mask &&
  59             !(qdev_alias_table[i].arch_mask & arch_type)) {
  60             continue;
  61         }
  62
  63         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  64             return qdev_alias_table[i].alias;
  65         }
  66     }
  67
  68     return NULL;
  69 }
  70
  71 static bool qdev_class_has_alias(DeviceClass *dc)
  72 {
  73     return (qdev_class_get_alias(dc) != NULL);
  74 }
  75
  76 static void qdev_print_devinfo(ObjectClass *klass, void *opaque)
  77 {
  78     DeviceClass *dc;
  79     bool *show_no_user = opaque;
  80
  81     dc = (DeviceClass *)object_class_dynamic_cast(klass, TYPE_DEVICE);
  82
  83     if (!dc || (show_no_user && !*show_no_user && dc->no_user)) {
  84         return;
  85     }
  86
  87     error_printf("name \"%s\"", object_class_get_name(klass));
  88     if (dc->bus_type) {
  89         error_printf(", bus %s", dc->bus_type);
  90     }
  91     if (qdev_class_has_alias(dc)) {
  92         error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
  93     }
  94     if (dc->desc) {
  95         error_printf(", desc \"%s\"", dc->desc);
  96     }
  97     if (dc->no_user) {
  98         error_printf(", no-user");
  99     }
 100     error_printf("\n");
 101 }
 102
 103 static int set_property(const char *name, const char *value, void *opaque)
 104 {
 105     DeviceState *dev = opaque;
 106
 107     if (strcmp(name, "driver") == 0)
 108         return 0;
 109     if (strcmp(name, "bus") == 0)
 110         return 0;
 111
 112     if (qdev_prop_parse(dev, name, value) == -1) {
 113         return -1;
 114     }
 115     return 0;
 116 }
 117
 118 static const char *find_typename_by_alias(const char *alias)
 119 {
 120     int i;
 121
 122     for (i = 0; qdev_alias_table[i].alias; 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].alias, alias) == 0) {
 129             return qdev_alias_table[i].typename;
 130         }
 131     }
 132
 133     return NULL;
 134 }
 135
 136 int qdev_device_help(QemuOpts *opts)
 137 {
 138     const char *driver;
 139     Property *prop;
 140     ObjectClass *klass;
 141
 142     driver = qemu_opt_get(opts, "driver");
 143     if (driver && is_help_option(driver)) {
 144         bool show_no_user = false;
 145         object_class_foreach(qdev_print_devinfo, TYPE_DEVICE, false, &show_no_user);
 146         return 1;
 147     }
 148
 149     if (!driver || !qemu_opt_has_help_opt(opts)) {
 150         return 0;
 151     }
 152
 153     klass = object_class_by_name(driver);
 154     if (!klass) {
 155         const char *typename = find_typename_by_alias(driver);
 156
 157         if (typename) {
 158             driver = typename;
 159             klass = object_class_by_name(driver);
 160         }
 161     }
 162
 163     if (!klass) {
 164         return 0;
 165     }
 166     do {
 167         for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
 168             /*
 169              * TODO Properties without a parser are just for dirty hacks.
 170              * qdev_prop_ptr is the only such PropertyInfo.  It's marked
 171              * for removal.  This conditional should be removed along with
 172              * it.
 173              */
 174             if (!prop->info->set) {
 175                 continue;           /* no way to set it, don't show */
 176             }
 177             error_printf("%s.%s=%s\n", driver, prop->name,
 178                          prop->info->legacy_name ?: prop->info->name);
 179         }
 180         klass = object_class_get_parent(klass);
 181     } while (klass != object_class_by_name(TYPE_DEVICE));
 182     return 1;
 183 }
 184
 185 static Object *qdev_get_peripheral(void)
 186 {
 187     static Object *dev;
 188
 189     if (dev == NULL) {
 190         dev = container_get(qdev_get_machine(), "/peripheral");
 191     }
 192
 193     return dev;
 194 }
 195
 196 static Object *qdev_get_peripheral_anon(void)
 197 {
 198     static Object *dev;
 199
 200     if (dev == NULL) {
 201         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 202     }
 203
 204     return dev;
 205 }
 206
 207 static void qbus_list_bus(DeviceState *dev)
 208 {
 209     BusState *child;
 210     const char *sep = " ";
 211
 212     error_printf("child busses at \"%s\":",
 213                  dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 214     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 215         error_printf("%s\"%s\"", sep, child->name);
 216         sep = ", ";
 217     }
 218     error_printf("\n");
 219 }
 220
 221 static void qbus_list_dev(BusState *bus)
 222 {
 223     BusChild *kid;
 224     const char *sep = " ";
 225
 226     error_printf("devices at \"%s\":", bus->name);
 227     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 228         DeviceState *dev = kid->child;
 229         error_printf("%s\"%s\"", sep, object_get_typename(OBJECT(dev)));
 230         if (dev->id)
 231             error_printf("/\"%s\"", dev->id);
 232         sep = ", ";
 233     }
 234     error_printf("\n");
 235 }
 236
 237 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 238 {
 239     BusState *child;
 240
 241     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 242         if (strcmp(child->name, elem) == 0) {
 243             return child;
 244         }
 245     }
 246     return NULL;
 247 }
 248
 249 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 250 {
 251     BusChild *kid;
 252
 253     /*
 254      * try to match in order:
 255      *   (1) instance id, if present
 256      *   (2) driver name
 257      *   (3) driver alias, if present
 258      */
 259     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 260         DeviceState *dev = kid->child;
 261         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 262             return dev;
 263         }
 264     }
 265     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 266         DeviceState *dev = kid->child;
 267         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 268             return dev;
 269         }
 270     }
 271     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 272         DeviceState *dev = kid->child;
 273         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 274
 275         if (qdev_class_has_alias(dc) &&
 276             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 277             return dev;
 278         }
 279     }
 280     return NULL;
 281 }
 282
 283 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 284                                      const char *bus_typename)
 285 {
 286     BusClass *bus_class = BUS_GET_CLASS(bus);
 287     BusChild *kid;
 288     BusState *child, *ret;
 289     int match = 1;
 290
 291     if (name && (strcmp(bus->name, name) != 0)) {
 292         match = 0;
 293     }
 294     if (bus_typename && !object_dynamic_cast(OBJECT(bus), bus_typename)) {
 295         match = 0;
 296     }
 297     if ((bus_class->max_dev != 0) && (bus_class->max_dev <= bus->max_index)) {
 298         if (name != NULL) {
 299             /* bus was explicitly specified: return an error. */
 300             qerror_report(ERROR_CLASS_GENERIC_ERROR, "Bus '%s' is full",
 301                           bus->name);
 302             return NULL;
 303         } else {
 304             /* bus was not specified: try to find another one. */
 305             match = 0;
 306         }
 307     }
 308     if (match) {
 309         return bus;
 310     }
 311
 312     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 313         DeviceState *dev = kid->child;
 314         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 315             ret = qbus_find_recursive(child, name, bus_typename);
 316             if (ret) {
 317                 return ret;
 318             }
 319         }
 320     }
 321     return NULL;
 322 }
 323
 324 static BusState *qbus_find(const char *path)
 325 {
 326     DeviceState *dev;
 327     BusState *bus;
 328     char elem[128];
 329     int pos, len;
 330
 331     /* find start element */
 332     if (path[0] == '/') {
 333         bus = sysbus_get_default();
 334         pos = 0;
 335     } else {
 336         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 337             assert(!path[0]);
 338             elem[0] = len = 0;
 339         }
 340         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 341         if (!bus) {
 342             qerror_report(QERR_BUS_NOT_FOUND, elem);
 343             return NULL;
 344         }
 345         pos = len;
 346     }
 347
 348     for (;;) {
 349         assert(path[pos] == '/' || !path[pos]);
 350         while (path[pos] == '/') {
 351             pos++;
 352         }
 353         if (path[pos] == '\0') {
 354             return bus;
 355         }
 356
 357         /* find device */
 358         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 359             assert(0);
 360             elem[0] = len = 0;
 361         }
 362         pos += len;
 363         dev = qbus_find_dev(bus, elem);
 364         if (!dev) {
 365             qerror_report(QERR_DEVICE_NOT_FOUND, elem);
 366             if (!monitor_cur_is_qmp()) {
 367                 qbus_list_dev(bus);
 368             }
 369             return NULL;
 370         }
 371
 372         assert(path[pos] == '/' || !path[pos]);
 373         while (path[pos] == '/') {
 374             pos++;
 375         }
 376         if (path[pos] == '\0') {
 377             /* last specified element is a device.  If it has exactly
 378              * one child bus accept it nevertheless */
 379             switch (dev->num_child_bus) {
 380             case 0:
 381                 qerror_report(QERR_DEVICE_NO_BUS, elem);
 382                 return NULL;
 383             case 1:
 384                 return QLIST_FIRST(&dev->child_bus);
 385             default:
 386                 qerror_report(QERR_DEVICE_MULTIPLE_BUSSES, elem);
 387                 if (!monitor_cur_is_qmp()) {
 388                     qbus_list_bus(dev);
 389                 }
 390                 return NULL;
 391             }
 392         }
 393
 394         /* find bus */
 395         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 396             assert(0);
 397             elem[0] = len = 0;
 398         }
 399         pos += len;
 400         bus = qbus_find_bus(dev, elem);
 401         if (!bus) {
 402             qerror_report(QERR_BUS_NOT_FOUND, elem);
 403             if (!monitor_cur_is_qmp()) {
 404                 qbus_list_bus(dev);
 405             }
 406             return NULL;
 407         }
 408     }
 409 }
 410
 411 DeviceState *qdev_device_add(QemuOpts *opts)
 412 {
 413     ObjectClass *obj;
 414     DeviceClass *k;
 415     const char *driver, *path, *id;
 416     DeviceState *qdev;
 417     BusState *bus;
 418
 419     driver = qemu_opt_get(opts, "driver");
 420     if (!driver) {
 421         qerror_report(QERR_MISSING_PARAMETER, "driver");
 422         return NULL;
 423     }
 424
 425     /* find driver */
 426     obj = object_class_by_name(driver);
 427     if (!obj) {
 428         const char *typename = find_typename_by_alias(driver);
 429
 430         if (typename) {
 431             driver = typename;
 432             obj = object_class_by_name(driver);
 433         }
 434     }
 435
 436     if (!obj) {
 437         qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver", "device type");
 438         return NULL;
 439     }
 440
 441     k = DEVICE_CLASS(obj);
 442
 443     /* find bus */
 444     path = qemu_opt_get(opts, "bus");
 445     if (path != NULL) {
 446         bus = qbus_find(path);
 447         if (!bus) {
 448             return NULL;
 449         }
 450         if (!object_dynamic_cast(OBJECT(bus), k->bus_type)) {
 451             qerror_report(QERR_BAD_BUS_FOR_DEVICE,
 452                           driver, object_get_typename(OBJECT(bus)));
 453             return NULL;
 454         }
 455     } else {
 456         bus = qbus_find_recursive(sysbus_get_default(), NULL, k->bus_type);
 457         if (!bus) {
 458             qerror_report(QERR_NO_BUS_FOR_DEVICE,
 459                           k->bus_type, driver);
 460             return NULL;
 461         }
 462     }
 463     if (qdev_hotplug && !bus->allow_hotplug) {
 464         qerror_report(QERR_BUS_NO_HOTPLUG, bus->name);
 465         return NULL;
 466     }
 467
 468     if (!bus) {
 469         bus = sysbus_get_default();
 470     }
 471
 472     /* create device, set properties */
 473     qdev = DEVICE(object_new(driver));
 474     qdev_set_parent_bus(qdev, bus);
 475
 476     id = qemu_opts_id(opts);
 477     if (id) {
 478         qdev->id = id;
 479     }
 480     if (qemu_opt_foreach(opts, set_property, qdev, 1) != 0) {
 481         qdev_free(qdev);
 482         return NULL;
 483     }
 484     if (qdev->id) {
 485         object_property_add_child(qdev_get_peripheral(), qdev->id,
 486                                   OBJECT(qdev), NULL);
 487     } else {
 488         static int anon_count;
 489         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 490         object_property_add_child(qdev_get_peripheral_anon(), name,
 491                                   OBJECT(qdev), NULL);
 492         g_free(name);
 493     }
 494     if (qdev_init(qdev) < 0) {
 495         qerror_report(QERR_DEVICE_INIT_FAILED, driver);
 496         return NULL;
 497     }
 498     qdev->opts = opts;
 499     return qdev;
 500 }
 501
 502
 503 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 504 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 505
 506 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 507                              int indent)
 508 {
 509     if (!props)
 510         return;
 511     for (; props->name; props++) {
 512         Error *err = NULL;
 513         char *value;
 514         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 515         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 516             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 517         } else {
 518             value = object_property_print(OBJECT(dev), props->name, &err);
 519         }
 520         g_free(legacy_name);
 521
 522         if (err) {
 523             error_free(err);
 524             continue;
 525         }
 526         qdev_printf("%s = %s\n", props->name,
 527                     value && *value ? value : "<null>");
 528         g_free(value);
 529     }
 530 }
 531
 532 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 533 {
 534     BusClass *bc = BUS_GET_CLASS(bus);
 535
 536     if (bc->print_dev) {
 537         bc->print_dev(mon, dev, indent);
 538     }
 539 }
 540
 541 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 542 {
 543     ObjectClass *class;
 544     BusState *child;
 545     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 546                 dev->id ? dev->id : "");
 547     indent += 2;
 548     if (dev->num_gpio_in) {
 549         qdev_printf("gpio-in %d\n", dev->num_gpio_in);
 550     }
 551     if (dev->num_gpio_out) {
 552         qdev_printf("gpio-out %d\n", dev->num_gpio_out);
 553     }
 554     class = object_get_class(OBJECT(dev));
 555     do {
 556         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 557         class = object_class_get_parent(class);
 558     } while (class != object_class_by_name(TYPE_DEVICE));
 559     bus_print_dev(dev->parent_bus, mon, dev, indent);
 560     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 561         qbus_print(mon, child, indent);
 562     }
 563 }
 564
 565 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 566 {
 567     BusChild *kid;
 568
 569     qdev_printf("bus: %s\n", bus->name);
 570     indent += 2;
 571     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 572     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 573         DeviceState *dev = kid->child;
 574         qdev_print(mon, dev, indent);
 575     }
 576 }
 577 #undef qdev_printf
 578
 579 void do_info_qtree(Monitor *mon, const QDict *qdict)
 580 {
 581     if (sysbus_get_default())
 582         qbus_print(mon, sysbus_get_default(), 0);
 583 }
 584
 585 void do_info_qdm(Monitor *mon, const QDict *qdict)
 586 {
 587     object_class_foreach(qdev_print_devinfo, TYPE_DEVICE, false, NULL);
 588 }
 589
 590 int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
 591 {
 592     Error *local_err = NULL;
 593     QemuOpts *opts;
 594     DeviceState *dev;
 595
 596     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 597     if (error_is_set(&local_err)) {
 598         qerror_report_err(local_err);
 599         error_free(local_err);
 600         return -1;
 601     }
 602     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 603         qemu_opts_del(opts);
 604         return 0;
 605     }
 606     dev = qdev_device_add(opts);
 607     if (!dev) {
 608         qemu_opts_del(opts);
 609         return -1;
 610     }
 611     object_unref(OBJECT(dev));
 612     return 0;
 613 }
 614
 615 void qmp_device_del(const char *id, Error **errp)
 616 {
 617     DeviceState *dev;
 618
 619     dev = qdev_find_recursive(sysbus_get_default(), id);
 620     if (NULL == dev) {
 621         error_set(errp, QERR_DEVICE_NOT_FOUND, id);
 622         return;
 623     }
 624
 625     qdev_unplug(dev, errp);
 626 }
 627
 628 void qdev_machine_init(void)
 629 {
 630     qdev_get_peripheral_anon();
 631     qdev_get_peripheral();
 632 }
 633
 634 QemuOptsList qemu_device_opts = {
 635     .name = "device",
 636     .implied_opt_name = "driver",
 637     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 638     .desc = {
 639         /*
 640          * no elements => accept any
 641          * sanity checking will happen later
 642          * when setting device properties
 643          */
 644         { /* end of list */ }
 645     },
 646 };
 647
 648 QemuOptsList qemu_global_opts = {
 649     .name = "global",
 650     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 651     .desc = {
 652         {
 653             .name = "driver",
 654             .type = QEMU_OPT_STRING,
 655         },{
 656             .name = "property",
 657             .type = QEMU_OPT_STRING,
 658         },{
 659             .name = "value",
 660             .type = QEMU_OPT_STRING,
 661         },
 662         { /* end of list */ }
 663     },
 664 };
 665
 666 int qemu_global_option(const char *str)
 667 {
 668     char driver[64], property[64];
 669     QemuOpts *opts;
 670     int rc, offset;
 671
 672     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 673     if (rc < 2 || str[offset] != '=') {
 674         error_report("can't parse: \"%s\"", str);
 675         return -1;
 676     }
 677
 678     opts = qemu_opts_create_nofail(&qemu_global_opts);
 679     qemu_opt_set(opts, "driver", driver);
 680     qemu_opt_set(opts, "property", property);
 681     qemu_opt_set(opts, "value", str+offset+1);
 682     return 0;
 683 }