Merge remote-tracking branch 'remotes/alistair/tags/pull-riscv-to-apply-20200702...
[qemu.git] / 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 "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/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 "qemu/option_int.h"
36 #include "sysemu/block-backend.h"
37 #include "sysemu/sysemu.h"
38 #include "migration/misc.h"
39 #include "migration/migration.h"
40 #include "qemu/cutils.h"
41 #include "hw/clock.h"
42
43 /*
44 * Aliases were a bad idea from the start. Let's keep them
45 * from spreading further.
46 */
47 typedef struct QDevAlias
48 {
49 const char *typename;
50 const char *alias;
51 uint32_t arch_mask;
52 } QDevAlias;
53
54 /* Please keep this table sorted by typename. */
55 static const QDevAlias qdev_alias_table[] = {
56 { "e1000", "e1000-82540em" },
57 { "ich9-ahci", "ahci" },
58 { "lsi53c895a", "lsi" },
59 { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X },
60 { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
61 { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X },
62 { "virtio-balloon-pci", "virtio-balloon",
63 QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
64 { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
65 { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
66 { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_S390X },
67 { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
68 { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_S390X },
69 { "virtio-input-host-pci", "virtio-input-host",
70 QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
71 { "virtio-iommu-pci", "virtio-iommu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
72 { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_S390X },
73 { "virtio-keyboard-pci", "virtio-keyboard",
74 QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
75 { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_S390X },
76 { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
77 { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
78 { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
79 { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_S390X },
80 { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
81 { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X },
82 { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
83 { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
84 { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
85 { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_S390X },
86 { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
87 { }
88 };
89
90 static const char *qdev_class_get_alias(DeviceClass *dc)
91 {
92 const char *typename = object_class_get_name(OBJECT_CLASS(dc));
93 int i;
94
95 for (i = 0; qdev_alias_table[i].typename; i++) {
96 if (qdev_alias_table[i].arch_mask &&
97 !(qdev_alias_table[i].arch_mask & arch_type)) {
98 continue;
99 }
100
101 if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
102 return qdev_alias_table[i].alias;
103 }
104 }
105
106 return NULL;
107 }
108
109 static bool qdev_class_has_alias(DeviceClass *dc)
110 {
111 return (qdev_class_get_alias(dc) != NULL);
112 }
113
114 static void qdev_print_devinfo(DeviceClass *dc)
115 {
116 qemu_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
117 if (dc->bus_type) {
118 qemu_printf(", bus %s", dc->bus_type);
119 }
120 if (qdev_class_has_alias(dc)) {
121 qemu_printf(", alias \"%s\"", qdev_class_get_alias(dc));
122 }
123 if (dc->desc) {
124 qemu_printf(", desc \"%s\"", dc->desc);
125 }
126 if (!dc->user_creatable) {
127 qemu_printf(", no-user");
128 }
129 qemu_printf("\n");
130 }
131
132 static void qdev_print_devinfos(bool show_no_user)
133 {
134 static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
135 [DEVICE_CATEGORY_BRIDGE] = "Controller/Bridge/Hub",
136 [DEVICE_CATEGORY_USB] = "USB",
137 [DEVICE_CATEGORY_STORAGE] = "Storage",
138 [DEVICE_CATEGORY_NETWORK] = "Network",
139 [DEVICE_CATEGORY_INPUT] = "Input",
140 [DEVICE_CATEGORY_DISPLAY] = "Display",
141 [DEVICE_CATEGORY_SOUND] = "Sound",
142 [DEVICE_CATEGORY_MISC] = "Misc",
143 [DEVICE_CATEGORY_CPU] = "CPU",
144 [DEVICE_CATEGORY_MAX] = "Uncategorized",
145 };
146 GSList *list, *elt;
147 int i;
148 bool cat_printed;
149
150 list = object_class_get_list_sorted(TYPE_DEVICE, false);
151
152 for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
153 cat_printed = false;
154 for (elt = list; elt; elt = elt->next) {
155 DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
156 TYPE_DEVICE);
157 if ((i < DEVICE_CATEGORY_MAX
158 ? !test_bit(i, dc->categories)
159 : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
160 || (!show_no_user
161 && !dc->user_creatable)) {
162 continue;
163 }
164 if (!cat_printed) {
165 qemu_printf("%s%s devices:\n", i ? "\n" : "", cat_name[i]);
166 cat_printed = true;
167 }
168 qdev_print_devinfo(dc);
169 }
170 }
171
172 g_slist_free(list);
173 }
174
175 static int set_property(void *opaque, const char *name, const char *value,
176 Error **errp)
177 {
178 Object *obj = opaque;
179 Error *err = NULL;
180
181 if (strcmp(name, "driver") == 0)
182 return 0;
183 if (strcmp(name, "bus") == 0)
184 return 0;
185
186 object_property_parse(obj, value, name, &err);
187 if (err != NULL) {
188 error_propagate(errp, err);
189 return -1;
190 }
191 return 0;
192 }
193
194 static const char *find_typename_by_alias(const char *alias)
195 {
196 int i;
197
198 for (i = 0; qdev_alias_table[i].alias; i++) {
199 if (qdev_alias_table[i].arch_mask &&
200 !(qdev_alias_table[i].arch_mask & arch_type)) {
201 continue;
202 }
203
204 if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
205 return qdev_alias_table[i].typename;
206 }
207 }
208
209 return NULL;
210 }
211
212 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
213 {
214 ObjectClass *oc;
215 DeviceClass *dc;
216 const char *original_name = *driver;
217
218 oc = object_class_by_name(*driver);
219 if (!oc) {
220 const char *typename = find_typename_by_alias(*driver);
221
222 if (typename) {
223 *driver = typename;
224 oc = object_class_by_name(*driver);
225 }
226 }
227
228 if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
229 if (*driver != original_name) {
230 error_setg(errp, "'%s' (alias '%s') is not a valid device model"
231 " name", original_name, *driver);
232 } else {
233 error_setg(errp, "'%s' is not a valid device model name", *driver);
234 }
235 return NULL;
236 }
237
238 if (object_class_is_abstract(oc)) {
239 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
240 "non-abstract device type");
241 return NULL;
242 }
243
244 dc = DEVICE_CLASS(oc);
245 if (!dc->user_creatable ||
246 (qdev_hotplug && !dc->hotpluggable)) {
247 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
248 "pluggable device type");
249 return NULL;
250 }
251
252 return dc;
253 }
254
255
256 int qdev_device_help(QemuOpts *opts)
257 {
258 Error *local_err = NULL;
259 const char *driver;
260 ObjectPropertyInfoList *prop_list;
261 ObjectPropertyInfoList *prop;
262 GPtrArray *array;
263 int i;
264
265 driver = qemu_opt_get(opts, "driver");
266 if (driver && is_help_option(driver)) {
267 qdev_print_devinfos(false);
268 return 1;
269 }
270
271 if (!driver || !qemu_opt_has_help_opt(opts)) {
272 return 0;
273 }
274
275 if (!object_class_by_name(driver)) {
276 const char *typename = find_typename_by_alias(driver);
277
278 if (typename) {
279 driver = typename;
280 }
281 }
282
283 prop_list = qmp_device_list_properties(driver, &local_err);
284 if (local_err) {
285 goto error;
286 }
287
288 if (prop_list) {
289 qemu_printf("%s options:\n", driver);
290 } else {
291 qemu_printf("There are no options for %s.\n", driver);
292 }
293 array = g_ptr_array_new();
294 for (prop = prop_list; prop; prop = prop->next) {
295 g_ptr_array_add(array,
296 object_property_help(prop->value->name,
297 prop->value->type,
298 prop->value->default_value,
299 prop->value->description));
300 }
301 g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
302 for (i = 0; i < array->len; i++) {
303 printf("%s\n", (char *)array->pdata[i]);
304 }
305 g_ptr_array_set_free_func(array, g_free);
306 g_ptr_array_free(array, true);
307 qapi_free_ObjectPropertyInfoList(prop_list);
308 return 1;
309
310 error:
311 error_report_err(local_err);
312 return 1;
313 }
314
315 static Object *qdev_get_peripheral(void)
316 {
317 static Object *dev;
318
319 if (dev == NULL) {
320 dev = container_get(qdev_get_machine(), "/peripheral");
321 }
322
323 return dev;
324 }
325
326 static Object *qdev_get_peripheral_anon(void)
327 {
328 static Object *dev;
329
330 if (dev == NULL) {
331 dev = container_get(qdev_get_machine(), "/peripheral-anon");
332 }
333
334 return dev;
335 }
336
337 static void qbus_error_append_bus_list_hint(DeviceState *dev,
338 Error *const *errp)
339 {
340 BusState *child;
341 const char *sep = " ";
342
343 error_append_hint(errp, "child buses at \"%s\":",
344 dev->id ? dev->id : object_get_typename(OBJECT(dev)));
345 QLIST_FOREACH(child, &dev->child_bus, sibling) {
346 error_append_hint(errp, "%s\"%s\"", sep, child->name);
347 sep = ", ";
348 }
349 error_append_hint(errp, "\n");
350 }
351
352 static void qbus_error_append_dev_list_hint(BusState *bus,
353 Error *const *errp)
354 {
355 BusChild *kid;
356 const char *sep = " ";
357
358 error_append_hint(errp, "devices at \"%s\":", bus->name);
359 QTAILQ_FOREACH(kid, &bus->children, sibling) {
360 DeviceState *dev = kid->child;
361 error_append_hint(errp, "%s\"%s\"", sep,
362 object_get_typename(OBJECT(dev)));
363 if (dev->id) {
364 error_append_hint(errp, "/\"%s\"", dev->id);
365 }
366 sep = ", ";
367 }
368 error_append_hint(errp, "\n");
369 }
370
371 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
372 {
373 BusState *child;
374
375 QLIST_FOREACH(child, &dev->child_bus, sibling) {
376 if (strcmp(child->name, elem) == 0) {
377 return child;
378 }
379 }
380 return NULL;
381 }
382
383 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
384 {
385 BusChild *kid;
386
387 /*
388 * try to match in order:
389 * (1) instance id, if present
390 * (2) driver name
391 * (3) driver alias, if present
392 */
393 QTAILQ_FOREACH(kid, &bus->children, sibling) {
394 DeviceState *dev = kid->child;
395 if (dev->id && strcmp(dev->id, elem) == 0) {
396 return dev;
397 }
398 }
399 QTAILQ_FOREACH(kid, &bus->children, sibling) {
400 DeviceState *dev = kid->child;
401 if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
402 return dev;
403 }
404 }
405 QTAILQ_FOREACH(kid, &bus->children, sibling) {
406 DeviceState *dev = kid->child;
407 DeviceClass *dc = DEVICE_GET_CLASS(dev);
408
409 if (qdev_class_has_alias(dc) &&
410 strcmp(qdev_class_get_alias(dc), elem) == 0) {
411 return dev;
412 }
413 }
414 return NULL;
415 }
416
417 static inline bool qbus_is_full(BusState *bus)
418 {
419 BusClass *bus_class = BUS_GET_CLASS(bus);
420 return bus_class->max_dev && bus->num_children >= bus_class->max_dev;
421 }
422
423 /*
424 * Search the tree rooted at @bus for a bus.
425 * If @name, search for a bus with that name. Note that bus names
426 * need not be unique. Yes, that's screwed up.
427 * Else search for a bus that is a subtype of @bus_typename.
428 * If more than one exists, prefer one that can take another device.
429 * Return the bus if found, else %NULL.
430 */
431 static BusState *qbus_find_recursive(BusState *bus, const char *name,
432 const char *bus_typename)
433 {
434 BusChild *kid;
435 BusState *pick, *child, *ret;
436 bool match;
437
438 assert(name || bus_typename);
439 if (name) {
440 match = !strcmp(bus->name, name);
441 } else {
442 match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
443 }
444
445 if (match && !qbus_is_full(bus)) {
446 return bus; /* root matches and isn't full */
447 }
448
449 pick = match ? bus : NULL;
450
451 QTAILQ_FOREACH(kid, &bus->children, sibling) {
452 DeviceState *dev = kid->child;
453 QLIST_FOREACH(child, &dev->child_bus, sibling) {
454 ret = qbus_find_recursive(child, name, bus_typename);
455 if (ret && !qbus_is_full(ret)) {
456 return ret; /* a descendant matches and isn't full */
457 }
458 if (ret && !pick) {
459 pick = ret;
460 }
461 }
462 }
463
464 /* root or a descendant matches, but is full */
465 return pick;
466 }
467
468 static BusState *qbus_find(const char *path, Error **errp)
469 {
470 DeviceState *dev;
471 BusState *bus;
472 char elem[128];
473 int pos, len;
474
475 /* find start element */
476 if (path[0] == '/') {
477 bus = sysbus_get_default();
478 pos = 0;
479 } else {
480 if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
481 assert(!path[0]);
482 elem[0] = len = 0;
483 }
484 bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
485 if (!bus) {
486 error_setg(errp, "Bus '%s' not found", elem);
487 return NULL;
488 }
489 pos = len;
490 }
491
492 for (;;) {
493 assert(path[pos] == '/' || !path[pos]);
494 while (path[pos] == '/') {
495 pos++;
496 }
497 if (path[pos] == '\0') {
498 break;
499 }
500
501 /* find device */
502 if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
503 g_assert_not_reached();
504 elem[0] = len = 0;
505 }
506 pos += len;
507 dev = qbus_find_dev(bus, elem);
508 if (!dev) {
509 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
510 "Device '%s' not found", elem);
511 qbus_error_append_dev_list_hint(bus, errp);
512 return NULL;
513 }
514
515 assert(path[pos] == '/' || !path[pos]);
516 while (path[pos] == '/') {
517 pos++;
518 }
519 if (path[pos] == '\0') {
520 /* last specified element is a device. If it has exactly
521 * one child bus accept it nevertheless */
522 if (dev->num_child_bus == 1) {
523 bus = QLIST_FIRST(&dev->child_bus);
524 break;
525 }
526 if (dev->num_child_bus) {
527 error_setg(errp, "Device '%s' has multiple child buses",
528 elem);
529 qbus_error_append_bus_list_hint(dev, errp);
530 } else {
531 error_setg(errp, "Device '%s' has no child bus", elem);
532 }
533 return NULL;
534 }
535
536 /* find bus */
537 if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
538 g_assert_not_reached();
539 elem[0] = len = 0;
540 }
541 pos += len;
542 bus = qbus_find_bus(dev, elem);
543 if (!bus) {
544 error_setg(errp, "Bus '%s' not found", elem);
545 qbus_error_append_bus_list_hint(dev, errp);
546 return NULL;
547 }
548 }
549
550 if (qbus_is_full(bus)) {
551 error_setg(errp, "Bus '%s' is full", path);
552 return NULL;
553 }
554 return bus;
555 }
556
557 void qdev_set_id(DeviceState *dev, const char *id)
558 {
559 if (id) {
560 dev->id = id;
561 }
562
563 if (dev->id) {
564 object_property_add_child(qdev_get_peripheral(), dev->id,
565 OBJECT(dev));
566 } else {
567 static int anon_count;
568 gchar *name = g_strdup_printf("device[%d]", anon_count++);
569 object_property_add_child(qdev_get_peripheral_anon(), name,
570 OBJECT(dev));
571 g_free(name);
572 }
573 }
574
575 static int is_failover_device(void *opaque, const char *name, const char *value,
576 Error **errp)
577 {
578 if (strcmp(name, "failover_pair_id") == 0) {
579 QemuOpts *opts = (QemuOpts *)opaque;
580
581 if (qdev_should_hide_device(opts)) {
582 return 1;
583 }
584 }
585
586 return 0;
587 }
588
589 static bool should_hide_device(QemuOpts *opts)
590 {
591 if (qemu_opt_foreach(opts, is_failover_device, opts, NULL) == 0) {
592 return false;
593 }
594 return true;
595 }
596
597 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
598 {
599 DeviceClass *dc;
600 const char *driver, *path;
601 DeviceState *dev = NULL;
602 BusState *bus = NULL;
603 Error *err = NULL;
604 bool hide;
605
606 driver = qemu_opt_get(opts, "driver");
607 if (!driver) {
608 error_setg(errp, QERR_MISSING_PARAMETER, "driver");
609 return NULL;
610 }
611
612 /* find driver */
613 dc = qdev_get_device_class(&driver, errp);
614 if (!dc) {
615 return NULL;
616 }
617
618 /* find bus */
619 path = qemu_opt_get(opts, "bus");
620 if (path != NULL) {
621 bus = qbus_find(path, errp);
622 if (!bus) {
623 return NULL;
624 }
625 if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
626 error_setg(errp, "Device '%s' can't go on %s bus",
627 driver, object_get_typename(OBJECT(bus)));
628 return NULL;
629 }
630 } else if (dc->bus_type != NULL) {
631 bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
632 if (!bus || qbus_is_full(bus)) {
633 error_setg(errp, "No '%s' bus found for device '%s'",
634 dc->bus_type, driver);
635 return NULL;
636 }
637 }
638 hide = should_hide_device(opts);
639
640 if ((hide || qdev_hotplug) && bus && !qbus_is_hotpluggable(bus)) {
641 error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
642 return NULL;
643 }
644
645 if (hide) {
646 return NULL;
647 }
648
649 if (!migration_is_idle()) {
650 error_setg(errp, "device_add not allowed while migrating");
651 return NULL;
652 }
653
654 /* create device */
655 dev = qdev_new(driver);
656
657 /* Check whether the hotplug is allowed by the machine */
658 if (qdev_hotplug && !qdev_hotplug_allowed(dev, &err)) {
659 /* Error must be set in the machine hook */
660 assert(err);
661 goto err_del_dev;
662 }
663
664 if (!bus && qdev_hotplug && !qdev_get_machine_hotplug_handler(dev)) {
665 /* No bus, no machine hotplug handler --> device is not hotpluggable */
666 error_setg(&err, "Device '%s' can not be hotplugged on this machine",
667 driver);
668 goto err_del_dev;
669 }
670
671 qdev_set_id(dev, qemu_opts_id(opts));
672
673 /* set properties */
674 if (qemu_opt_foreach(opts, set_property, dev, &err)) {
675 goto err_del_dev;
676 }
677
678 dev->opts = opts;
679 qdev_realize(DEVICE(dev), bus, &err);
680 if (err != NULL) {
681 dev->opts = NULL;
682 goto err_del_dev;
683 }
684 return dev;
685
686 err_del_dev:
687 error_propagate(errp, err);
688 if (dev) {
689 object_unparent(OBJECT(dev));
690 object_unref(OBJECT(dev));
691 }
692 return NULL;
693 }
694
695
696 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
697 static void qbus_print(Monitor *mon, BusState *bus, int indent);
698
699 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
700 int indent)
701 {
702 if (!props)
703 return;
704 for (; props->name; props++) {
705 Error *err = NULL;
706 char *value;
707 char *legacy_name = g_strdup_printf("legacy-%s", props->name);
708 if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
709 value = object_property_get_str(OBJECT(dev), legacy_name, &err);
710 } else {
711 value = object_property_print(OBJECT(dev), props->name, true, &err);
712 }
713 g_free(legacy_name);
714
715 if (err) {
716 error_free(err);
717 continue;
718 }
719 qdev_printf("%s = %s\n", props->name,
720 value && *value ? value : "<null>");
721 g_free(value);
722 }
723 }
724
725 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
726 {
727 BusClass *bc = BUS_GET_CLASS(bus);
728
729 if (bc->print_dev) {
730 bc->print_dev(mon, dev, indent);
731 }
732 }
733
734 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
735 {
736 ObjectClass *class;
737 BusState *child;
738 NamedGPIOList *ngl;
739 NamedClockList *ncl;
740
741 qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
742 dev->id ? dev->id : "");
743 indent += 2;
744 QLIST_FOREACH(ngl, &dev->gpios, node) {
745 if (ngl->num_in) {
746 qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
747 ngl->num_in);
748 }
749 if (ngl->num_out) {
750 qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
751 ngl->num_out);
752 }
753 }
754 QLIST_FOREACH(ncl, &dev->clocks, node) {
755 qdev_printf("clock-%s%s \"%s\" freq_hz=%e\n",
756 ncl->output ? "out" : "in",
757 ncl->alias ? " (alias)" : "",
758 ncl->name,
759 CLOCK_PERIOD_TO_HZ(1.0 * clock_get(ncl->clock)));
760 }
761 class = object_get_class(OBJECT(dev));
762 do {
763 qdev_print_props(mon, dev, DEVICE_CLASS(class)->props_, indent);
764 class = object_class_get_parent(class);
765 } while (class != object_class_by_name(TYPE_DEVICE));
766 bus_print_dev(dev->parent_bus, mon, dev, indent);
767 QLIST_FOREACH(child, &dev->child_bus, sibling) {
768 qbus_print(mon, child, indent);
769 }
770 }
771
772 static void qbus_print(Monitor *mon, BusState *bus, int indent)
773 {
774 BusChild *kid;
775
776 qdev_printf("bus: %s\n", bus->name);
777 indent += 2;
778 qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
779 QTAILQ_FOREACH(kid, &bus->children, sibling) {
780 DeviceState *dev = kid->child;
781 qdev_print(mon, dev, indent);
782 }
783 }
784 #undef qdev_printf
785
786 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
787 {
788 if (sysbus_get_default())
789 qbus_print(mon, sysbus_get_default(), 0);
790 }
791
792 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
793 {
794 qdev_print_devinfos(true);
795 }
796
797 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
798 {
799 Error *local_err = NULL;
800 QemuOpts *opts;
801 DeviceState *dev;
802
803 opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
804 if (local_err) {
805 error_propagate(errp, local_err);
806 return;
807 }
808 if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
809 qemu_opts_del(opts);
810 return;
811 }
812 dev = qdev_device_add(opts, &local_err);
813 if (!dev) {
814 error_propagate(errp, local_err);
815 qemu_opts_del(opts);
816 return;
817 }
818 object_unref(OBJECT(dev));
819 }
820
821 static DeviceState *find_device_state(const char *id, Error **errp)
822 {
823 Object *obj;
824
825 if (id[0] == '/') {
826 obj = object_resolve_path(id, NULL);
827 } else {
828 char *root_path = object_get_canonical_path(qdev_get_peripheral());
829 char *path = g_strdup_printf("%s/%s", root_path, id);
830
831 g_free(root_path);
832 obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
833 g_free(path);
834 }
835
836 if (!obj) {
837 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
838 "Device '%s' not found", id);
839 return NULL;
840 }
841
842 if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
843 error_setg(errp, "%s is not a hotpluggable device", id);
844 return NULL;
845 }
846
847 return DEVICE(obj);
848 }
849
850 void qdev_unplug(DeviceState *dev, Error **errp)
851 {
852 DeviceClass *dc = DEVICE_GET_CLASS(dev);
853 HotplugHandler *hotplug_ctrl;
854 HotplugHandlerClass *hdc;
855 Error *local_err = NULL;
856
857 if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
858 error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
859 return;
860 }
861
862 if (!dc->hotpluggable) {
863 error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
864 object_get_typename(OBJECT(dev)));
865 return;
866 }
867
868 if (!migration_is_idle() && !dev->allow_unplug_during_migration) {
869 error_setg(errp, "device_del not allowed while migrating");
870 return;
871 }
872
873 qdev_hot_removed = true;
874
875 hotplug_ctrl = qdev_get_hotplug_handler(dev);
876 /* hotpluggable device MUST have HotplugHandler, if it doesn't
877 * then something is very wrong with it */
878 g_assert(hotplug_ctrl);
879
880 /* If device supports async unplug just request it to be done,
881 * otherwise just remove it synchronously */
882 hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
883 if (hdc->unplug_request) {
884 hotplug_handler_unplug_request(hotplug_ctrl, dev, &local_err);
885 } else {
886 hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
887 if (!local_err) {
888 object_unparent(OBJECT(dev));
889 }
890 }
891 error_propagate(errp, local_err);
892 }
893
894 void qmp_device_del(const char *id, Error **errp)
895 {
896 DeviceState *dev = find_device_state(id, errp);
897 if (dev != NULL) {
898 if (dev->pending_deleted_event) {
899 error_setg(errp, "Device %s is already in the "
900 "process of unplug", id);
901 return;
902 }
903
904 qdev_unplug(dev, errp);
905 }
906 }
907
908 void hmp_device_add(Monitor *mon, const QDict *qdict)
909 {
910 Error *err = NULL;
911
912 qmp_device_add((QDict *)qdict, NULL, &err);
913 hmp_handle_error(mon, err);
914 }
915
916 void hmp_device_del(Monitor *mon, const QDict *qdict)
917 {
918 const char *id = qdict_get_str(qdict, "id");
919 Error *err = NULL;
920
921 qmp_device_del(id, &err);
922 hmp_handle_error(mon, err);
923 }
924
925 BlockBackend *blk_by_qdev_id(const char *id, Error **errp)
926 {
927 DeviceState *dev;
928 BlockBackend *blk;
929
930 dev = find_device_state(id, errp);
931 if (dev == NULL) {
932 return NULL;
933 }
934
935 blk = blk_by_dev(dev);
936 if (!blk) {
937 error_setg(errp, "Device does not have a block device backend");
938 }
939 return blk;
940 }
941
942 void qdev_machine_init(void)
943 {
944 qdev_get_peripheral_anon();
945 qdev_get_peripheral();
946 }
947
948 QemuOptsList qemu_device_opts = {
949 .name = "device",
950 .implied_opt_name = "driver",
951 .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
952 .desc = {
953 /*
954 * no elements => accept any
955 * sanity checking will happen later
956 * when setting device properties
957 */
958 { /* end of list */ }
959 },
960 };
961
962 QemuOptsList qemu_global_opts = {
963 .name = "global",
964 .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
965 .desc = {
966 {
967 .name = "driver",
968 .type = QEMU_OPT_STRING,
969 },{
970 .name = "property",
971 .type = QEMU_OPT_STRING,
972 },{
973 .name = "value",
974 .type = QEMU_OPT_STRING,
975 },
976 { /* end of list */ }
977 },
978 };
979
980 int qemu_global_option(const char *str)
981 {
982 char driver[64], property[64];
983 QemuOpts *opts;
984 int rc, offset;
985
986 rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
987 if (rc == 2 && str[offset] == '=') {
988 opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
989 qemu_opt_set(opts, "driver", driver, &error_abort);
990 qemu_opt_set(opts, "property", property, &error_abort);
991 qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
992 return 0;
993 }
994
995 opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
996 if (!opts) {
997 return -1;
998 }
999
1000 return 0;
1001 }