target/arm: Set VFP-related MVFR0 fields for arm926 and arm1026
[qemu/ar7.git] / qdev-monitor.c
blob58222c2211d2116fda1dd65a4fca3740e6144981
1 /*
2 * Dynamic device configuration and creation.
4 * Copyright (c) 2009 CodeSourcery
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.
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.
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/>.
20 #include "qemu/osdep.h"
21 #include "hw/qdev.h"
22 #include "hw/sysbus.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/qdict.h"
29 #include "qapi/qmp/qerror.h"
30 #include "qemu/config-file.h"
31 #include "qemu/error-report.h"
32 #include "qemu/help_option.h"
33 #include "qemu/option.h"
34 #include "qemu/qemu-print.h"
35 #include "sysemu/block-backend.h"
36 #include "migration/misc.h"
39 * Aliases were a bad idea from the start. Let's keep them
40 * from spreading further.
42 typedef struct QDevAlias
44 const char *typename;
45 const char *alias;
46 uint32_t arch_mask;
47 } QDevAlias;
49 /* Please keep this table sorted by typename. */
50 static const QDevAlias qdev_alias_table[] = {
51 { "e1000", "e1000-82540em" },
52 { "ich9-ahci", "ahci" },
53 { "lsi53c895a", "lsi" },
54 { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X },
55 { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
56 { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X },
57 { "virtio-balloon-pci", "virtio-balloon",
58 QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
59 { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
60 { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
61 { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_S390X },
62 { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
63 { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_S390X },
64 { "virtio-input-host-pci", "virtio-input-host",
65 QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
66 { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_S390X },
67 { "virtio-keyboard-pci", "virtio-keyboard",
68 QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
69 { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_S390X },
70 { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
71 { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
72 { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
73 { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_S390X },
74 { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
75 { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X },
76 { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
77 { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
78 { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
79 { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_S390X },
80 { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
81 { }
84 static const char *qdev_class_get_alias(DeviceClass *dc)
86 const char *typename = object_class_get_name(OBJECT_CLASS(dc));
87 int i;
89 for (i = 0; qdev_alias_table[i].typename; i++) {
90 if (qdev_alias_table[i].arch_mask &&
91 !(qdev_alias_table[i].arch_mask & arch_type)) {
92 continue;
95 if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
96 return qdev_alias_table[i].alias;
100 return NULL;
103 static bool qdev_class_has_alias(DeviceClass *dc)
105 return (qdev_class_get_alias(dc) != NULL);
108 static void qdev_print_devinfo(DeviceClass *dc)
110 qemu_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
111 if (dc->bus_type) {
112 qemu_printf(", bus %s", dc->bus_type);
114 if (qdev_class_has_alias(dc)) {
115 qemu_printf(", alias \"%s\"", qdev_class_get_alias(dc));
117 if (dc->desc) {
118 qemu_printf(", desc \"%s\"", dc->desc);
120 if (!dc->user_creatable) {
121 qemu_printf(", no-user");
123 qemu_printf("\n");
126 static void qdev_print_devinfos(bool show_no_user)
128 static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
129 [DEVICE_CATEGORY_BRIDGE] = "Controller/Bridge/Hub",
130 [DEVICE_CATEGORY_USB] = "USB",
131 [DEVICE_CATEGORY_STORAGE] = "Storage",
132 [DEVICE_CATEGORY_NETWORK] = "Network",
133 [DEVICE_CATEGORY_INPUT] = "Input",
134 [DEVICE_CATEGORY_DISPLAY] = "Display",
135 [DEVICE_CATEGORY_SOUND] = "Sound",
136 [DEVICE_CATEGORY_MISC] = "Misc",
137 [DEVICE_CATEGORY_CPU] = "CPU",
138 [DEVICE_CATEGORY_MAX] = "Uncategorized",
140 GSList *list, *elt;
141 int i;
142 bool cat_printed;
144 list = object_class_get_list_sorted(TYPE_DEVICE, false);
146 for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
147 cat_printed = false;
148 for (elt = list; elt; elt = elt->next) {
149 DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
150 TYPE_DEVICE);
151 if ((i < DEVICE_CATEGORY_MAX
152 ? !test_bit(i, dc->categories)
153 : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
154 || (!show_no_user
155 && !dc->user_creatable)) {
156 continue;
158 if (!cat_printed) {
159 qemu_printf("%s%s devices:\n", i ? "\n" : "", cat_name[i]);
160 cat_printed = true;
162 qdev_print_devinfo(dc);
166 g_slist_free(list);
169 static int set_property(void *opaque, const char *name, const char *value,
170 Error **errp)
172 Object *obj = opaque;
173 Error *err = NULL;
175 if (strcmp(name, "driver") == 0)
176 return 0;
177 if (strcmp(name, "bus") == 0)
178 return 0;
180 object_property_parse(obj, value, name, &err);
181 if (err != NULL) {
182 error_propagate(errp, err);
183 return -1;
185 return 0;
188 static const char *find_typename_by_alias(const char *alias)
190 int i;
192 for (i = 0; qdev_alias_table[i].alias; i++) {
193 if (qdev_alias_table[i].arch_mask &&
194 !(qdev_alias_table[i].arch_mask & arch_type)) {
195 continue;
198 if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
199 return qdev_alias_table[i].typename;
203 return NULL;
206 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
208 ObjectClass *oc;
209 DeviceClass *dc;
210 const char *original_name = *driver;
212 oc = object_class_by_name(*driver);
213 if (!oc) {
214 const char *typename = find_typename_by_alias(*driver);
216 if (typename) {
217 *driver = typename;
218 oc = object_class_by_name(*driver);
222 if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
223 if (*driver != original_name) {
224 error_setg(errp, "'%s' (alias '%s') is not a valid device model"
225 " name", original_name, *driver);
226 } else {
227 error_setg(errp, "'%s' is not a valid device model name", *driver);
229 return NULL;
232 if (object_class_is_abstract(oc)) {
233 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
234 "non-abstract device type");
235 return NULL;
238 dc = DEVICE_CLASS(oc);
239 if (!dc->user_creatable ||
240 (qdev_hotplug && !dc->hotpluggable)) {
241 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
242 "pluggable device type");
243 return NULL;
246 return dc;
250 int qdev_device_help(QemuOpts *opts)
252 Error *local_err = NULL;
253 const char *driver;
254 ObjectPropertyInfoList *prop_list;
255 ObjectPropertyInfoList *prop;
257 driver = qemu_opt_get(opts, "driver");
258 if (driver && is_help_option(driver)) {
259 qdev_print_devinfos(false);
260 return 1;
263 if (!driver || !qemu_opt_has_help_opt(opts)) {
264 return 0;
267 if (!object_class_by_name(driver)) {
268 const char *typename = find_typename_by_alias(driver);
270 if (typename) {
271 driver = typename;
275 prop_list = qmp_device_list_properties(driver, &local_err);
276 if (local_err) {
277 goto error;
280 if (prop_list) {
281 qemu_printf("%s options:\n", driver);
282 } else {
283 qemu_printf("There are no options for %s.\n", driver);
285 for (prop = prop_list; prop; prop = prop->next) {
286 int len;
287 qemu_printf(" %s=<%s>%n", prop->value->name, prop->value->type, &len);
288 if (prop->value->has_description) {
289 if (len < 24) {
290 qemu_printf("%*s", 24 - len, "");
292 qemu_printf(" - %s\n", prop->value->description);
293 } else {
294 qemu_printf("\n");
298 qapi_free_ObjectPropertyInfoList(prop_list);
299 return 1;
301 error:
302 error_report_err(local_err);
303 return 1;
306 static Object *qdev_get_peripheral(void)
308 static Object *dev;
310 if (dev == NULL) {
311 dev = container_get(qdev_get_machine(), "/peripheral");
314 return dev;
317 static Object *qdev_get_peripheral_anon(void)
319 static Object *dev;
321 if (dev == NULL) {
322 dev = container_get(qdev_get_machine(), "/peripheral-anon");
325 return dev;
328 static void qbus_list_bus(DeviceState *dev, Error **errp)
330 BusState *child;
331 const char *sep = " ";
333 error_append_hint(errp, "child buses at \"%s\":",
334 dev->id ? dev->id : object_get_typename(OBJECT(dev)));
335 QLIST_FOREACH(child, &dev->child_bus, sibling) {
336 error_append_hint(errp, "%s\"%s\"", sep, child->name);
337 sep = ", ";
339 error_append_hint(errp, "\n");
342 static void qbus_list_dev(BusState *bus, Error **errp)
344 BusChild *kid;
345 const char *sep = " ";
347 error_append_hint(errp, "devices at \"%s\":", bus->name);
348 QTAILQ_FOREACH(kid, &bus->children, sibling) {
349 DeviceState *dev = kid->child;
350 error_append_hint(errp, "%s\"%s\"", sep,
351 object_get_typename(OBJECT(dev)));
352 if (dev->id) {
353 error_append_hint(errp, "/\"%s\"", dev->id);
355 sep = ", ";
357 error_append_hint(errp, "\n");
360 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
362 BusState *child;
364 QLIST_FOREACH(child, &dev->child_bus, sibling) {
365 if (strcmp(child->name, elem) == 0) {
366 return child;
369 return NULL;
372 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
374 BusChild *kid;
377 * try to match in order:
378 * (1) instance id, if present
379 * (2) driver name
380 * (3) driver alias, if present
382 QTAILQ_FOREACH(kid, &bus->children, sibling) {
383 DeviceState *dev = kid->child;
384 if (dev->id && strcmp(dev->id, elem) == 0) {
385 return dev;
388 QTAILQ_FOREACH(kid, &bus->children, sibling) {
389 DeviceState *dev = kid->child;
390 if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
391 return dev;
394 QTAILQ_FOREACH(kid, &bus->children, sibling) {
395 DeviceState *dev = kid->child;
396 DeviceClass *dc = DEVICE_GET_CLASS(dev);
398 if (qdev_class_has_alias(dc) &&
399 strcmp(qdev_class_get_alias(dc), elem) == 0) {
400 return dev;
403 return NULL;
406 static inline bool qbus_is_full(BusState *bus)
408 BusClass *bus_class = BUS_GET_CLASS(bus);
409 return bus_class->max_dev && bus->num_children >= bus_class->max_dev;
413 * Search the tree rooted at @bus for a bus.
414 * If @name, search for a bus with that name. Note that bus names
415 * need not be unique. Yes, that's screwed up.
416 * Else search for a bus that is a subtype of @bus_typename.
417 * If more than one exists, prefer one that can take another device.
418 * Return the bus if found, else %NULL.
420 static BusState *qbus_find_recursive(BusState *bus, const char *name,
421 const char *bus_typename)
423 BusChild *kid;
424 BusState *pick, *child, *ret;
425 bool match;
427 assert(name || bus_typename);
428 if (name) {
429 match = !strcmp(bus->name, name);
430 } else {
431 match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
434 if (match && !qbus_is_full(bus)) {
435 return bus; /* root matches and isn't full */
438 pick = match ? bus : NULL;
440 QTAILQ_FOREACH(kid, &bus->children, sibling) {
441 DeviceState *dev = kid->child;
442 QLIST_FOREACH(child, &dev->child_bus, sibling) {
443 ret = qbus_find_recursive(child, name, bus_typename);
444 if (ret && !qbus_is_full(ret)) {
445 return ret; /* a descendant matches and isn't full */
447 if (ret && !pick) {
448 pick = ret;
453 /* root or a descendant matches, but is full */
454 return pick;
457 static BusState *qbus_find(const char *path, Error **errp)
459 DeviceState *dev;
460 BusState *bus;
461 char elem[128];
462 int pos, len;
464 /* find start element */
465 if (path[0] == '/') {
466 bus = sysbus_get_default();
467 pos = 0;
468 } else {
469 if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
470 assert(!path[0]);
471 elem[0] = len = 0;
473 bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
474 if (!bus) {
475 error_setg(errp, "Bus '%s' not found", elem);
476 return NULL;
478 pos = len;
481 for (;;) {
482 assert(path[pos] == '/' || !path[pos]);
483 while (path[pos] == '/') {
484 pos++;
486 if (path[pos] == '\0') {
487 break;
490 /* find device */
491 if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
492 g_assert_not_reached();
493 elem[0] = len = 0;
495 pos += len;
496 dev = qbus_find_dev(bus, elem);
497 if (!dev) {
498 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
499 "Device '%s' not found", elem);
500 qbus_list_dev(bus, errp);
501 return NULL;
504 assert(path[pos] == '/' || !path[pos]);
505 while (path[pos] == '/') {
506 pos++;
508 if (path[pos] == '\0') {
509 /* last specified element is a device. If it has exactly
510 * one child bus accept it nevertheless */
511 if (dev->num_child_bus == 1) {
512 bus = QLIST_FIRST(&dev->child_bus);
513 break;
515 if (dev->num_child_bus) {
516 error_setg(errp, "Device '%s' has multiple child buses",
517 elem);
518 qbus_list_bus(dev, errp);
519 } else {
520 error_setg(errp, "Device '%s' has no child bus", elem);
522 return NULL;
525 /* find bus */
526 if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
527 g_assert_not_reached();
528 elem[0] = len = 0;
530 pos += len;
531 bus = qbus_find_bus(dev, elem);
532 if (!bus) {
533 error_setg(errp, "Bus '%s' not found", elem);
534 qbus_list_bus(dev, errp);
535 return NULL;
539 if (qbus_is_full(bus)) {
540 error_setg(errp, "Bus '%s' is full", path);
541 return NULL;
543 return bus;
546 void qdev_set_id(DeviceState *dev, const char *id)
548 if (id) {
549 dev->id = id;
552 if (dev->id) {
553 object_property_add_child(qdev_get_peripheral(), dev->id,
554 OBJECT(dev), NULL);
555 } else {
556 static int anon_count;
557 gchar *name = g_strdup_printf("device[%d]", anon_count++);
558 object_property_add_child(qdev_get_peripheral_anon(), name,
559 OBJECT(dev), NULL);
560 g_free(name);
564 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
566 DeviceClass *dc;
567 const char *driver, *path;
568 DeviceState *dev;
569 BusState *bus = NULL;
570 Error *err = NULL;
572 driver = qemu_opt_get(opts, "driver");
573 if (!driver) {
574 error_setg(errp, QERR_MISSING_PARAMETER, "driver");
575 return NULL;
578 /* find driver */
579 dc = qdev_get_device_class(&driver, errp);
580 if (!dc) {
581 return NULL;
584 /* find bus */
585 path = qemu_opt_get(opts, "bus");
586 if (path != NULL) {
587 bus = qbus_find(path, errp);
588 if (!bus) {
589 return NULL;
591 if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
592 error_setg(errp, "Device '%s' can't go on %s bus",
593 driver, object_get_typename(OBJECT(bus)));
594 return NULL;
596 } else if (dc->bus_type != NULL) {
597 bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
598 if (!bus || qbus_is_full(bus)) {
599 error_setg(errp, "No '%s' bus found for device '%s'",
600 dc->bus_type, driver);
601 return NULL;
604 if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
605 error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
606 return NULL;
609 if (!migration_is_idle()) {
610 error_setg(errp, "device_add not allowed while migrating");
611 return NULL;
614 /* create device */
615 dev = DEVICE(object_new(driver));
617 if (bus) {
618 qdev_set_parent_bus(dev, bus);
619 } else if (qdev_hotplug && !qdev_get_machine_hotplug_handler(dev)) {
620 /* No bus, no machine hotplug handler --> device is not hotpluggable */
621 error_setg(&err, "Device '%s' can not be hotplugged on this machine",
622 driver);
623 goto err_del_dev;
626 qdev_set_id(dev, qemu_opts_id(opts));
628 /* set properties */
629 if (qemu_opt_foreach(opts, set_property, dev, &err)) {
630 goto err_del_dev;
633 dev->opts = opts;
634 object_property_set_bool(OBJECT(dev), true, "realized", &err);
635 if (err != NULL) {
636 dev->opts = NULL;
637 goto err_del_dev;
639 return dev;
641 err_del_dev:
642 error_propagate(errp, err);
643 object_unparent(OBJECT(dev));
644 object_unref(OBJECT(dev));
645 return NULL;
649 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
650 static void qbus_print(Monitor *mon, BusState *bus, int indent);
652 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
653 int indent)
655 if (!props)
656 return;
657 for (; props->name; props++) {
658 Error *err = NULL;
659 char *value;
660 char *legacy_name = g_strdup_printf("legacy-%s", props->name);
661 if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
662 value = object_property_get_str(OBJECT(dev), legacy_name, &err);
663 } else {
664 value = object_property_print(OBJECT(dev), props->name, true, &err);
666 g_free(legacy_name);
668 if (err) {
669 error_free(err);
670 continue;
672 qdev_printf("%s = %s\n", props->name,
673 value && *value ? value : "<null>");
674 g_free(value);
678 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
680 BusClass *bc = BUS_GET_CLASS(bus);
682 if (bc->print_dev) {
683 bc->print_dev(mon, dev, indent);
687 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
689 ObjectClass *class;
690 BusState *child;
691 NamedGPIOList *ngl;
693 qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
694 dev->id ? dev->id : "");
695 indent += 2;
696 QLIST_FOREACH(ngl, &dev->gpios, node) {
697 if (ngl->num_in) {
698 qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
699 ngl->num_in);
701 if (ngl->num_out) {
702 qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
703 ngl->num_out);
706 class = object_get_class(OBJECT(dev));
707 do {
708 qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
709 class = object_class_get_parent(class);
710 } while (class != object_class_by_name(TYPE_DEVICE));
711 bus_print_dev(dev->parent_bus, mon, dev, indent);
712 QLIST_FOREACH(child, &dev->child_bus, sibling) {
713 qbus_print(mon, child, indent);
717 static void qbus_print(Monitor *mon, BusState *bus, int indent)
719 BusChild *kid;
721 qdev_printf("bus: %s\n", bus->name);
722 indent += 2;
723 qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
724 QTAILQ_FOREACH(kid, &bus->children, sibling) {
725 DeviceState *dev = kid->child;
726 qdev_print(mon, dev, indent);
729 #undef qdev_printf
731 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
733 if (sysbus_get_default())
734 qbus_print(mon, sysbus_get_default(), 0);
737 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
739 qdev_print_devinfos(true);
742 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
744 Error *local_err = NULL;
745 QemuOpts *opts;
746 DeviceState *dev;
748 opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
749 if (local_err) {
750 error_propagate(errp, local_err);
751 return;
753 if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
754 qemu_opts_del(opts);
755 return;
757 dev = qdev_device_add(opts, &local_err);
758 if (!dev) {
759 error_propagate(errp, local_err);
760 qemu_opts_del(opts);
761 return;
763 object_unref(OBJECT(dev));
766 static DeviceState *find_device_state(const char *id, Error **errp)
768 Object *obj;
770 if (id[0] == '/') {
771 obj = object_resolve_path(id, NULL);
772 } else {
773 char *root_path = object_get_canonical_path(qdev_get_peripheral());
774 char *path = g_strdup_printf("%s/%s", root_path, id);
776 g_free(root_path);
777 obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
778 g_free(path);
781 if (!obj) {
782 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
783 "Device '%s' not found", id);
784 return NULL;
787 if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
788 error_setg(errp, "%s is not a hotpluggable device", id);
789 return NULL;
792 return DEVICE(obj);
795 void qdev_unplug(DeviceState *dev, Error **errp)
797 DeviceClass *dc = DEVICE_GET_CLASS(dev);
798 HotplugHandler *hotplug_ctrl;
799 HotplugHandlerClass *hdc;
800 Error *local_err = NULL;
802 if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
803 error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
804 return;
807 if (!dc->hotpluggable) {
808 error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
809 object_get_typename(OBJECT(dev)));
810 return;
813 if (!migration_is_idle()) {
814 error_setg(errp, "device_del not allowed while migrating");
815 return;
818 qdev_hot_removed = true;
820 hotplug_ctrl = qdev_get_hotplug_handler(dev);
821 /* hotpluggable device MUST have HotplugHandler, if it doesn't
822 * then something is very wrong with it */
823 g_assert(hotplug_ctrl);
825 /* If device supports async unplug just request it to be done,
826 * otherwise just remove it synchronously */
827 hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
828 if (hdc->unplug_request) {
829 hotplug_handler_unplug_request(hotplug_ctrl, dev, &local_err);
830 } else {
831 hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
832 if (!local_err) {
833 object_unparent(OBJECT(dev));
836 error_propagate(errp, local_err);
839 void qmp_device_del(const char *id, Error **errp)
841 DeviceState *dev = find_device_state(id, errp);
842 if (dev != NULL) {
843 qdev_unplug(dev, errp);
847 BlockBackend *blk_by_qdev_id(const char *id, Error **errp)
849 DeviceState *dev;
850 BlockBackend *blk;
852 dev = find_device_state(id, errp);
853 if (dev == NULL) {
854 return NULL;
857 blk = blk_by_dev(dev);
858 if (!blk) {
859 error_setg(errp, "Device does not have a block device backend");
861 return blk;
864 void qdev_machine_init(void)
866 qdev_get_peripheral_anon();
867 qdev_get_peripheral();
870 QemuOptsList qemu_device_opts = {
871 .name = "device",
872 .implied_opt_name = "driver",
873 .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
874 .desc = {
876 * no elements => accept any
877 * sanity checking will happen later
878 * when setting device properties
880 { /* end of list */ }
884 QemuOptsList qemu_global_opts = {
885 .name = "global",
886 .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
887 .desc = {
889 .name = "driver",
890 .type = QEMU_OPT_STRING,
892 .name = "property",
893 .type = QEMU_OPT_STRING,
895 .name = "value",
896 .type = QEMU_OPT_STRING,
898 { /* end of list */ }
902 int qemu_global_option(const char *str)
904 char driver[64], property[64];
905 QemuOpts *opts;
906 int rc, offset;
908 rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
909 if (rc == 2 && str[offset] == '=') {
910 opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
911 qemu_opt_set(opts, "driver", driver, &error_abort);
912 qemu_opt_set(opts, "property", property, &error_abort);
913 qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
914 return 0;
917 opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
918 if (!opts) {
919 return -1;
922 return 0;