s390x/ipl: switch error reporting to error_setg
[qemu.git] / qdev-monitor.c
bloba35098f711b7f1333f4a9de16935159f1926001c
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 "hw/qdev.h"
21 #include "hw/sysbus.h"
22 #include "monitor/monitor.h"
23 #include "monitor/qdev.h"
24 #include "qmp-commands.h"
25 #include "sysemu/arch_init.h"
26 #include "qapi/qmp/qerror.h"
27 #include "qemu/config-file.h"
28 #include "qemu/error-report.h"
31 * Aliases were a bad idea from the start. Let's keep them
32 * from spreading further.
34 typedef struct QDevAlias
36 const char *typename;
37 const char *alias;
38 uint32_t arch_mask;
39 } QDevAlias;
41 static const QDevAlias qdev_alias_table[] = {
42 { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
43 { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
44 { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
45 { "virtio-balloon-pci", "virtio-balloon",
46 QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
47 { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
48 { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
49 { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
50 { "lsi53c895a", "lsi" },
51 { "ich9-ahci", "ahci" },
52 { "kvm-pci-assign", "pci-assign" },
53 { "e1000", "e1000-82540em" },
54 { }
57 static const char *qdev_class_get_alias(DeviceClass *dc)
59 const char *typename = object_class_get_name(OBJECT_CLASS(dc));
60 int i;
62 for (i = 0; qdev_alias_table[i].typename; i++) {
63 if (qdev_alias_table[i].arch_mask &&
64 !(qdev_alias_table[i].arch_mask & arch_type)) {
65 continue;
68 if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
69 return qdev_alias_table[i].alias;
73 return NULL;
76 static bool qdev_class_has_alias(DeviceClass *dc)
78 return (qdev_class_get_alias(dc) != NULL);
81 static void qdev_print_devinfo(DeviceClass *dc)
83 error_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
84 if (dc->bus_type) {
85 error_printf(", bus %s", dc->bus_type);
87 if (qdev_class_has_alias(dc)) {
88 error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
90 if (dc->desc) {
91 error_printf(", desc \"%s\"", dc->desc);
93 if (dc->cannot_instantiate_with_device_add_yet) {
94 error_printf(", no-user");
96 error_printf("\n");
99 static gint devinfo_cmp(gconstpointer a, gconstpointer b)
101 return strcasecmp(object_class_get_name((ObjectClass *)a),
102 object_class_get_name((ObjectClass *)b));
105 static void qdev_print_devinfos(bool show_no_user)
107 static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
108 [DEVICE_CATEGORY_BRIDGE] = "Controller/Bridge/Hub",
109 [DEVICE_CATEGORY_USB] = "USB",
110 [DEVICE_CATEGORY_STORAGE] = "Storage",
111 [DEVICE_CATEGORY_NETWORK] = "Network",
112 [DEVICE_CATEGORY_INPUT] = "Input",
113 [DEVICE_CATEGORY_DISPLAY] = "Display",
114 [DEVICE_CATEGORY_SOUND] = "Sound",
115 [DEVICE_CATEGORY_MISC] = "Misc",
116 [DEVICE_CATEGORY_MAX] = "Uncategorized",
118 GSList *list, *elt;
119 int i;
120 bool cat_printed;
122 list = g_slist_sort(object_class_get_list(TYPE_DEVICE, false),
123 devinfo_cmp);
125 for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
126 cat_printed = false;
127 for (elt = list; elt; elt = elt->next) {
128 DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
129 TYPE_DEVICE);
130 if ((i < DEVICE_CATEGORY_MAX
131 ? !test_bit(i, dc->categories)
132 : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
133 || (!show_no_user
134 && dc->cannot_instantiate_with_device_add_yet)) {
135 continue;
137 if (!cat_printed) {
138 error_printf("%s%s devices:\n", i ? "\n" : "",
139 cat_name[i]);
140 cat_printed = true;
142 qdev_print_devinfo(dc);
146 g_slist_free(list);
149 static int set_property(void *opaque, const char *name, const char *value,
150 Error **errp)
152 Object *obj = opaque;
153 Error *err = NULL;
155 if (strcmp(name, "driver") == 0)
156 return 0;
157 if (strcmp(name, "bus") == 0)
158 return 0;
160 object_property_parse(obj, value, name, &err);
161 if (err != NULL) {
162 error_propagate(errp, err);
163 return -1;
165 return 0;
168 static const char *find_typename_by_alias(const char *alias)
170 int i;
172 for (i = 0; qdev_alias_table[i].alias; i++) {
173 if (qdev_alias_table[i].arch_mask &&
174 !(qdev_alias_table[i].arch_mask & arch_type)) {
175 continue;
178 if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
179 return qdev_alias_table[i].typename;
183 return NULL;
186 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
188 ObjectClass *oc;
189 DeviceClass *dc;
191 oc = object_class_by_name(*driver);
192 if (!oc) {
193 const char *typename = find_typename_by_alias(*driver);
195 if (typename) {
196 *driver = typename;
197 oc = object_class_by_name(*driver);
201 if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
202 error_setg(errp, "'%s' is not a valid device model name", *driver);
203 return NULL;
206 if (object_class_is_abstract(oc)) {
207 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
208 "non-abstract device type");
209 return NULL;
212 dc = DEVICE_CLASS(oc);
213 if (dc->cannot_instantiate_with_device_add_yet ||
214 (qdev_hotplug && !dc->hotpluggable)) {
215 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
216 "pluggable device type");
217 return NULL;
220 return dc;
224 int qdev_device_help(QemuOpts *opts)
226 Error *local_err = NULL;
227 const char *driver;
228 DevicePropertyInfoList *prop_list;
229 DevicePropertyInfoList *prop;
231 driver = qemu_opt_get(opts, "driver");
232 if (driver && is_help_option(driver)) {
233 qdev_print_devinfos(false);
234 return 1;
237 if (!driver || !qemu_opt_has_help_opt(opts)) {
238 return 0;
241 if (!object_class_by_name(driver)) {
242 const char *typename = find_typename_by_alias(driver);
244 if (typename) {
245 driver = typename;
249 prop_list = qmp_device_list_properties(driver, &local_err);
250 if (local_err) {
251 goto error;
254 for (prop = prop_list; prop; prop = prop->next) {
255 error_printf("%s.%s=%s", driver,
256 prop->value->name,
257 prop->value->type);
258 if (prop->value->has_description) {
259 error_printf(" (%s)\n", prop->value->description);
260 } else {
261 error_printf("\n");
265 qapi_free_DevicePropertyInfoList(prop_list);
266 return 1;
268 error:
269 error_printf("%s\n", error_get_pretty(local_err));
270 error_free(local_err);
271 return 1;
274 static Object *qdev_get_peripheral(void)
276 static Object *dev;
278 if (dev == NULL) {
279 dev = container_get(qdev_get_machine(), "/peripheral");
282 return dev;
285 static Object *qdev_get_peripheral_anon(void)
287 static Object *dev;
289 if (dev == NULL) {
290 dev = container_get(qdev_get_machine(), "/peripheral-anon");
293 return dev;
296 static void qbus_list_bus(DeviceState *dev, Error **errp)
298 BusState *child;
299 const char *sep = " ";
301 error_append_hint(errp, "child buses at \"%s\":",
302 dev->id ? dev->id : object_get_typename(OBJECT(dev)));
303 QLIST_FOREACH(child, &dev->child_bus, sibling) {
304 error_append_hint(errp, "%s\"%s\"", sep, child->name);
305 sep = ", ";
309 static void qbus_list_dev(BusState *bus, Error **errp)
311 BusChild *kid;
312 const char *sep = " ";
314 error_append_hint(errp, "devices at \"%s\":", bus->name);
315 QTAILQ_FOREACH(kid, &bus->children, sibling) {
316 DeviceState *dev = kid->child;
317 error_append_hint(errp, "%s\"%s\"", sep,
318 object_get_typename(OBJECT(dev)));
319 if (dev->id) {
320 error_append_hint(errp, "/\"%s\"", dev->id);
322 sep = ", ";
326 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
328 BusState *child;
330 QLIST_FOREACH(child, &dev->child_bus, sibling) {
331 if (strcmp(child->name, elem) == 0) {
332 return child;
335 return NULL;
338 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
340 BusChild *kid;
343 * try to match in order:
344 * (1) instance id, if present
345 * (2) driver name
346 * (3) driver alias, if present
348 QTAILQ_FOREACH(kid, &bus->children, sibling) {
349 DeviceState *dev = kid->child;
350 if (dev->id && strcmp(dev->id, elem) == 0) {
351 return dev;
354 QTAILQ_FOREACH(kid, &bus->children, sibling) {
355 DeviceState *dev = kid->child;
356 if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
357 return dev;
360 QTAILQ_FOREACH(kid, &bus->children, sibling) {
361 DeviceState *dev = kid->child;
362 DeviceClass *dc = DEVICE_GET_CLASS(dev);
364 if (qdev_class_has_alias(dc) &&
365 strcmp(qdev_class_get_alias(dc), elem) == 0) {
366 return dev;
369 return NULL;
372 static inline bool qbus_is_full(BusState *bus)
374 BusClass *bus_class = BUS_GET_CLASS(bus);
375 return bus_class->max_dev && bus->max_index >= bus_class->max_dev;
379 * Search the tree rooted at @bus for a bus.
380 * If @name, search for a bus with that name. Note that bus names
381 * need not be unique. Yes, that's screwed up.
382 * Else search for a bus that is a subtype of @bus_typename.
383 * If more than one exists, prefer one that can take another device.
384 * Return the bus if found, else %NULL.
386 static BusState *qbus_find_recursive(BusState *bus, const char *name,
387 const char *bus_typename)
389 BusChild *kid;
390 BusState *pick, *child, *ret;
391 bool match;
393 assert(name || bus_typename);
394 if (name) {
395 match = !strcmp(bus->name, name);
396 } else {
397 match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
400 if (match && !qbus_is_full(bus)) {
401 return bus; /* root matches and isn't full */
404 pick = match ? bus : NULL;
406 QTAILQ_FOREACH(kid, &bus->children, sibling) {
407 DeviceState *dev = kid->child;
408 QLIST_FOREACH(child, &dev->child_bus, sibling) {
409 ret = qbus_find_recursive(child, name, bus_typename);
410 if (ret && !qbus_is_full(ret)) {
411 return ret; /* a descendant matches and isn't full */
413 if (ret && !pick) {
414 pick = ret;
419 /* root or a descendant matches, but is full */
420 return pick;
423 static BusState *qbus_find(const char *path, Error **errp)
425 DeviceState *dev;
426 BusState *bus;
427 char elem[128];
428 int pos, len;
430 /* find start element */
431 if (path[0] == '/') {
432 bus = sysbus_get_default();
433 pos = 0;
434 } else {
435 if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
436 assert(!path[0]);
437 elem[0] = len = 0;
439 bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
440 if (!bus) {
441 error_setg(errp, "Bus '%s' not found", elem);
442 return NULL;
444 pos = len;
447 for (;;) {
448 assert(path[pos] == '/' || !path[pos]);
449 while (path[pos] == '/') {
450 pos++;
452 if (path[pos] == '\0') {
453 break;
456 /* find device */
457 if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
458 g_assert_not_reached();
459 elem[0] = len = 0;
461 pos += len;
462 dev = qbus_find_dev(bus, elem);
463 if (!dev) {
464 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
465 "Device '%s' not found", elem);
466 qbus_list_dev(bus, errp);
467 return NULL;
470 assert(path[pos] == '/' || !path[pos]);
471 while (path[pos] == '/') {
472 pos++;
474 if (path[pos] == '\0') {
475 /* last specified element is a device. If it has exactly
476 * one child bus accept it nevertheless */
477 if (dev->num_child_bus == 1) {
478 bus = QLIST_FIRST(&dev->child_bus);
479 break;
481 if (dev->num_child_bus) {
482 error_setg(errp, "Device '%s' has multiple child buses",
483 elem);
484 qbus_list_bus(dev, errp);
485 } else {
486 error_setg(errp, "Device '%s' has no child bus", elem);
488 return NULL;
491 /* find bus */
492 if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
493 g_assert_not_reached();
494 elem[0] = len = 0;
496 pos += len;
497 bus = qbus_find_bus(dev, elem);
498 if (!bus) {
499 error_setg(errp, "Bus '%s' not found", elem);
500 qbus_list_bus(dev, errp);
501 return NULL;
505 if (qbus_is_full(bus)) {
506 error_setg(errp, "Bus '%s' is full", path);
507 return NULL;
509 return bus;
512 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
514 DeviceClass *dc;
515 const char *driver, *path, *id;
516 DeviceState *dev;
517 BusState *bus = NULL;
518 Error *err = NULL;
520 driver = qemu_opt_get(opts, "driver");
521 if (!driver) {
522 error_setg(errp, QERR_MISSING_PARAMETER, "driver");
523 return NULL;
526 /* find driver */
527 dc = qdev_get_device_class(&driver, errp);
528 if (!dc) {
529 return NULL;
532 /* find bus */
533 path = qemu_opt_get(opts, "bus");
534 if (path != NULL) {
535 bus = qbus_find(path, errp);
536 if (!bus) {
537 return NULL;
539 if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
540 error_setg(errp, "Device '%s' can't go on %s bus",
541 driver, object_get_typename(OBJECT(bus)));
542 return NULL;
544 } else if (dc->bus_type != NULL) {
545 bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
546 if (!bus || qbus_is_full(bus)) {
547 error_setg(errp, "No '%s' bus found for device '%s'",
548 dc->bus_type, driver);
549 return NULL;
552 if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
553 error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
554 return NULL;
557 /* create device */
558 dev = DEVICE(object_new(driver));
560 if (bus) {
561 qdev_set_parent_bus(dev, bus);
564 id = qemu_opts_id(opts);
565 if (id) {
566 dev->id = id;
569 if (dev->id) {
570 object_property_add_child(qdev_get_peripheral(), dev->id,
571 OBJECT(dev), NULL);
572 } else {
573 static int anon_count;
574 gchar *name = g_strdup_printf("device[%d]", anon_count++);
575 object_property_add_child(qdev_get_peripheral_anon(), name,
576 OBJECT(dev), NULL);
577 g_free(name);
580 /* set properties */
581 if (qemu_opt_foreach(opts, set_property, dev, &err)) {
582 error_propagate(errp, err);
583 object_unparent(OBJECT(dev));
584 object_unref(OBJECT(dev));
585 return NULL;
588 dev->opts = opts;
589 object_property_set_bool(OBJECT(dev), true, "realized", &err);
590 if (err != NULL) {
591 error_propagate(errp, err);
592 dev->opts = NULL;
593 object_unparent(OBJECT(dev));
594 object_unref(OBJECT(dev));
595 return NULL;
597 return dev;
601 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
602 static void qbus_print(Monitor *mon, BusState *bus, int indent);
604 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
605 int indent)
607 if (!props)
608 return;
609 for (; props->name; props++) {
610 Error *err = NULL;
611 char *value;
612 char *legacy_name = g_strdup_printf("legacy-%s", props->name);
613 if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
614 value = object_property_get_str(OBJECT(dev), legacy_name, &err);
615 } else {
616 value = object_property_print(OBJECT(dev), props->name, true, &err);
618 g_free(legacy_name);
620 if (err) {
621 error_free(err);
622 continue;
624 qdev_printf("%s = %s\n", props->name,
625 value && *value ? value : "<null>");
626 g_free(value);
630 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
632 BusClass *bc = BUS_GET_CLASS(bus);
634 if (bc->print_dev) {
635 bc->print_dev(mon, dev, indent);
639 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
641 ObjectClass *class;
642 BusState *child;
643 NamedGPIOList *ngl;
645 qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
646 dev->id ? dev->id : "");
647 indent += 2;
648 QLIST_FOREACH(ngl, &dev->gpios, node) {
649 if (ngl->num_in) {
650 qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
651 ngl->num_in);
653 if (ngl->num_out) {
654 qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
655 ngl->num_out);
658 class = object_get_class(OBJECT(dev));
659 do {
660 qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
661 class = object_class_get_parent(class);
662 } while (class != object_class_by_name(TYPE_DEVICE));
663 bus_print_dev(dev->parent_bus, mon, dev, indent);
664 QLIST_FOREACH(child, &dev->child_bus, sibling) {
665 qbus_print(mon, child, indent);
669 static void qbus_print(Monitor *mon, BusState *bus, int indent)
671 BusChild *kid;
673 qdev_printf("bus: %s\n", bus->name);
674 indent += 2;
675 qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
676 QTAILQ_FOREACH(kid, &bus->children, sibling) {
677 DeviceState *dev = kid->child;
678 qdev_print(mon, dev, indent);
681 #undef qdev_printf
683 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
685 if (sysbus_get_default())
686 qbus_print(mon, sysbus_get_default(), 0);
689 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
691 qdev_print_devinfos(true);
694 typedef struct QOMCompositionState {
695 Monitor *mon;
696 int indent;
697 } QOMCompositionState;
699 static void print_qom_composition(Monitor *mon, Object *obj, int indent);
701 static int print_qom_composition_child(Object *obj, void *opaque)
703 QOMCompositionState *s = opaque;
705 print_qom_composition(s->mon, obj, s->indent);
707 return 0;
710 static void print_qom_composition(Monitor *mon, Object *obj, int indent)
712 QOMCompositionState s = {
713 .mon = mon,
714 .indent = indent + 2,
716 char *name;
718 if (obj == object_get_root()) {
719 name = g_strdup("");
720 } else {
721 name = object_get_canonical_path_component(obj);
723 monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
724 object_get_typename(obj));
725 g_free(name);
726 object_child_foreach(obj, print_qom_composition_child, &s);
729 void hmp_info_qom_tree(Monitor *mon, const QDict *dict)
731 const char *path = qdict_get_try_str(dict, "path");
732 Object *obj;
733 bool ambiguous = false;
735 if (path) {
736 obj = object_resolve_path(path, &ambiguous);
737 if (!obj) {
738 monitor_printf(mon, "Path '%s' could not be resolved.\n", path);
739 return;
741 if (ambiguous) {
742 monitor_printf(mon, "Warning: Path '%s' is ambiguous.\n", path);
743 return;
745 } else {
746 obj = qdev_get_machine();
748 print_qom_composition(mon, obj, 0);
751 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
753 Error *local_err = NULL;
754 QemuOpts *opts;
755 DeviceState *dev;
757 opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
758 if (local_err) {
759 error_propagate(errp, local_err);
760 return;
762 if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
763 qemu_opts_del(opts);
764 return;
766 dev = qdev_device_add(opts, &local_err);
767 if (!dev) {
768 error_propagate(errp, local_err);
769 qemu_opts_del(opts);
770 return;
772 object_unref(OBJECT(dev));
775 void qmp_device_del(const char *id, Error **errp)
777 Object *obj;
779 if (id[0] == '/') {
780 obj = object_resolve_path(id, NULL);
781 } else {
782 char *root_path = object_get_canonical_path(qdev_get_peripheral());
783 char *path = g_strdup_printf("%s/%s", root_path, id);
785 g_free(root_path);
786 obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
787 g_free(path);
790 if (!obj) {
791 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
792 "Device '%s' not found", id);
793 return;
796 if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
797 error_setg(errp, "%s is not a hotpluggable device", id);
798 return;
801 qdev_unplug(DEVICE(obj), errp);
804 void qdev_machine_init(void)
806 qdev_get_peripheral_anon();
807 qdev_get_peripheral();
810 QemuOptsList qemu_device_opts = {
811 .name = "device",
812 .implied_opt_name = "driver",
813 .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
814 .desc = {
816 * no elements => accept any
817 * sanity checking will happen later
818 * when setting device properties
820 { /* end of list */ }
824 QemuOptsList qemu_global_opts = {
825 .name = "global",
826 .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
827 .desc = {
829 .name = "driver",
830 .type = QEMU_OPT_STRING,
832 .name = "property",
833 .type = QEMU_OPT_STRING,
835 .name = "value",
836 .type = QEMU_OPT_STRING,
838 { /* end of list */ }
842 int qemu_global_option(const char *str)
844 char driver[64], property[64];
845 QemuOpts *opts;
846 int rc, offset;
848 rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
849 if (rc == 2 && str[offset] == '=') {
850 opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
851 qemu_opt_set(opts, "driver", driver, &error_abort);
852 qemu_opt_set(opts, "property", property, &error_abort);
853 qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
854 return 0;
857 opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
858 if (!opts) {
859 return -1;
862 return 0;