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.h"
  22 #include "qmp-commands.h"
  23 #include "arch_init.h"
  24 #include "qemu-config.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     BusChild *kid;
 287     BusState *child, *ret;
 288     int match = 1;
 289
 290     if (name && (strcmp(bus->name, name) != 0)) {
 291         match = 0;
 292     }
 293     if (bus_typename && !object_dynamic_cast(OBJECT(bus), bus_typename)) {
 294         match = 0;
 295     }
 296     if (match) {
 297         return bus;
 298     }
 299
 300     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 301         DeviceState *dev = kid->child;
 302         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 303             ret = qbus_find_recursive(child, name, bus_typename);
 304             if (ret) {
 305                 return ret;
 306             }
 307         }
 308     }
 309     return NULL;
 310 }
 311
 312 static BusState *qbus_find(const char *path)
 313 {
 314     DeviceState *dev;
 315     BusState *bus;
 316     char elem[128];
 317     int pos, len;
 318
 319     /* find start element */
 320     if (path[0] == '/') {
 321         bus = sysbus_get_default();
 322         pos = 0;
 323     } else {
 324         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 325             assert(!path[0]);
 326             elem[0] = len = 0;
 327         }
 328         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 329         if (!bus) {
 330             qerror_report(QERR_BUS_NOT_FOUND, elem);
 331             return NULL;
 332         }
 333         pos = len;
 334     }
 335
 336     for (;;) {
 337         assert(path[pos] == '/' || !path[pos]);
 338         while (path[pos] == '/') {
 339             pos++;
 340         }
 341         if (path[pos] == '\0') {
 342             return bus;
 343         }
 344
 345         /* find device */
 346         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 347             assert(0);
 348             elem[0] = len = 0;
 349         }
 350         pos += len;
 351         dev = qbus_find_dev(bus, elem);
 352         if (!dev) {
 353             qerror_report(QERR_DEVICE_NOT_FOUND, elem);
 354             if (!monitor_cur_is_qmp()) {
 355                 qbus_list_dev(bus);
 356             }
 357             return NULL;
 358         }
 359
 360         assert(path[pos] == '/' || !path[pos]);
 361         while (path[pos] == '/') {
 362             pos++;
 363         }
 364         if (path[pos] == '\0') {
 365             /* last specified element is a device.  If it has exactly
 366              * one child bus accept it nevertheless */
 367             switch (dev->num_child_bus) {
 368             case 0:
 369                 qerror_report(QERR_DEVICE_NO_BUS, elem);
 370                 return NULL;
 371             case 1:
 372                 return QLIST_FIRST(&dev->child_bus);
 373             default:
 374                 qerror_report(QERR_DEVICE_MULTIPLE_BUSSES, elem);
 375                 if (!monitor_cur_is_qmp()) {
 376                     qbus_list_bus(dev);
 377                 }
 378                 return NULL;
 379             }
 380         }
 381
 382         /* find bus */
 383         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 384             assert(0);
 385             elem[0] = len = 0;
 386         }
 387         pos += len;
 388         bus = qbus_find_bus(dev, elem);
 389         if (!bus) {
 390             qerror_report(QERR_BUS_NOT_FOUND, elem);
 391             if (!monitor_cur_is_qmp()) {
 392                 qbus_list_bus(dev);
 393             }
 394             return NULL;
 395         }
 396     }
 397 }
 398
 399 DeviceState *qdev_device_add(QemuOpts *opts)
 400 {
 401     ObjectClass *obj;
 402     DeviceClass *k;
 403     const char *driver, *path, *id;
 404     DeviceState *qdev;
 405     BusState *bus;
 406
 407     driver = qemu_opt_get(opts, "driver");
 408     if (!driver) {
 409         qerror_report(QERR_MISSING_PARAMETER, "driver");
 410         return NULL;
 411     }
 412
 413     /* find driver */
 414     obj = object_class_by_name(driver);
 415     if (!obj) {
 416         const char *typename = find_typename_by_alias(driver);
 417
 418         if (typename) {
 419             driver = typename;
 420             obj = object_class_by_name(driver);
 421         }
 422     }
 423
 424     if (!obj) {
 425         qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver", "device type");
 426         return NULL;
 427     }
 428
 429     k = DEVICE_CLASS(obj);
 430
 431     /* find bus */
 432     path = qemu_opt_get(opts, "bus");
 433     if (path != NULL) {
 434         bus = qbus_find(path);
 435         if (!bus) {
 436             return NULL;
 437         }
 438         if (!object_dynamic_cast(OBJECT(bus), k->bus_type)) {
 439             qerror_report(QERR_BAD_BUS_FOR_DEVICE,
 440                           driver, object_get_typename(OBJECT(bus)));
 441             return NULL;
 442         }
 443     } else {
 444         bus = qbus_find_recursive(sysbus_get_default(), NULL, k->bus_type);
 445         if (!bus) {
 446             qerror_report(QERR_NO_BUS_FOR_DEVICE,
 447                           k->bus_type, driver);
 448             return NULL;
 449         }
 450     }
 451     if (qdev_hotplug && !bus->allow_hotplug) {
 452         qerror_report(QERR_BUS_NO_HOTPLUG, bus->name);
 453         return NULL;
 454     }
 455
 456     if (!bus) {
 457         bus = sysbus_get_default();
 458     }
 459
 460     /* create device, set properties */
 461     qdev = DEVICE(object_new(driver));
 462     qdev_set_parent_bus(qdev, bus);
 463
 464     id = qemu_opts_id(opts);
 465     if (id) {
 466         qdev->id = id;
 467     }
 468     if (qemu_opt_foreach(opts, set_property, qdev, 1) != 0) {
 469         qdev_free(qdev);
 470         return NULL;
 471     }
 472     if (qdev->id) {
 473         object_property_add_child(qdev_get_peripheral(), qdev->id,
 474                                   OBJECT(qdev), NULL);
 475     } else {
 476         static int anon_count;
 477         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 478         object_property_add_child(qdev_get_peripheral_anon(), name,
 479                                   OBJECT(qdev), NULL);
 480         g_free(name);
 481     }
 482     if (qdev_init(qdev) < 0) {
 483         qerror_report(QERR_DEVICE_INIT_FAILED, driver);
 484         return NULL;
 485     }
 486     qdev->opts = opts;
 487     return qdev;
 488 }
 489
 490
 491 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 492 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 493
 494 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 495                              int indent)
 496 {
 497     if (!props)
 498         return;
 499     for (; props->name; props++) {
 500         Error *err = NULL;
 501         char *value;
 502         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 503         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 504             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 505         } else {
 506             value = object_property_print(OBJECT(dev), props->name, &err);
 507         }
 508         g_free(legacy_name);
 509
 510         if (err) {
 511             error_free(err);
 512             continue;
 513         }
 514         qdev_printf("%s = %s\n", props->name,
 515                     value && *value ? value : "<null>");
 516         g_free(value);
 517     }
 518 }
 519
 520 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 521 {
 522     BusClass *bc = BUS_GET_CLASS(bus);
 523
 524     if (bc->print_dev) {
 525         bc->print_dev(mon, dev, indent);
 526     }
 527 }
 528
 529 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 530 {
 531     ObjectClass *class;
 532     BusState *child;
 533     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 534                 dev->id ? dev->id : "");
 535     indent += 2;
 536     if (dev->num_gpio_in) {
 537         qdev_printf("gpio-in %d\n", dev->num_gpio_in);
 538     }
 539     if (dev->num_gpio_out) {
 540         qdev_printf("gpio-out %d\n", dev->num_gpio_out);
 541     }
 542     class = object_get_class(OBJECT(dev));
 543     do {
 544         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 545         class = object_class_get_parent(class);
 546     } while (class != object_class_by_name(TYPE_DEVICE));
 547     bus_print_dev(dev->parent_bus, mon, dev, indent);
 548     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 549         qbus_print(mon, child, indent);
 550     }
 551 }
 552
 553 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 554 {
 555     BusChild *kid;
 556
 557     qdev_printf("bus: %s\n", bus->name);
 558     indent += 2;
 559     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 560     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 561         DeviceState *dev = kid->child;
 562         qdev_print(mon, dev, indent);
 563     }
 564 }
 565 #undef qdev_printf
 566
 567 void do_info_qtree(Monitor *mon)
 568 {
 569     if (sysbus_get_default())
 570         qbus_print(mon, sysbus_get_default(), 0);
 571 }
 572
 573 void do_info_qdm(Monitor *mon)
 574 {
 575     object_class_foreach(qdev_print_devinfo, TYPE_DEVICE, false, NULL);
 576 }
 577
 578 int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
 579 {
 580     Error *local_err = NULL;
 581     QemuOpts *opts;
 582
 583     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 584     if (error_is_set(&local_err)) {
 585         qerror_report_err(local_err);
 586         error_free(local_err);
 587         return -1;
 588     }
 589     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 590         qemu_opts_del(opts);
 591         return 0;
 592     }
 593     if (!qdev_device_add(opts)) {
 594         qemu_opts_del(opts);
 595         return -1;
 596     }
 597     return 0;
 598 }
 599
 600 void qmp_device_del(const char *id, Error **errp)
 601 {
 602     DeviceState *dev;
 603
 604     dev = qdev_find_recursive(sysbus_get_default(), id);
 605     if (NULL == dev) {
 606         error_set(errp, QERR_DEVICE_NOT_FOUND, id);
 607         return;
 608     }
 609
 610     qdev_unplug(dev, errp);
 611 }
 612
 613 void qdev_machine_init(void)
 614 {
 615     qdev_get_peripheral_anon();
 616     qdev_get_peripheral();
 617 }