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 2.1 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 { "AC97", "ac97" }, /* -soundhw name */
57 { "e1000", "e1000-82540em" },
58 { "ES1370", "es1370" }, /* -soundhw name */
59 { "ich9-ahci", "ahci" },
60 { "lsi53c895a", "lsi" },
61 { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X },
62 { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
63 { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X },
64 { "virtio-balloon-pci", "virtio-balloon",
65 QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
66 { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
67 { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
68 { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_S390X },
69 { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
70 { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_S390X },
71 { "virtio-input-host-pci", "virtio-input-host",
72 QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
73 { "virtio-iommu-pci", "virtio-iommu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
74 { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_S390X },
75 { "virtio-keyboard-pci", "virtio-keyboard",
76 QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
77 { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_S390X },
78 { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
79 { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
80 { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
81 { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_S390X },
82 { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
83 { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X },
84 { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
85 { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
86 { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
87 { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_S390X },
88 { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
89 { }
90 };
91
qdev_class_get_alias(DeviceClass * dc)92 static const char *qdev_class_get_alias(DeviceClass *dc)
93 {
94 const char *typename = object_class_get_name(OBJECT_CLASS(dc));
95 int i;
96
97 for (i = 0; qdev_alias_table[i].typename; i++) {
98 if (qdev_alias_table[i].arch_mask &&
99 !(qdev_alias_table[i].arch_mask & arch_type)) {
100 continue;
101 }
102
103 if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
104 return qdev_alias_table[i].alias;
105 }
106 }
107
108 return NULL;
109 }
110
qdev_class_has_alias(DeviceClass * dc)111 static bool qdev_class_has_alias(DeviceClass *dc)
112 {
113 return (qdev_class_get_alias(dc) != NULL);
114 }
115
qdev_print_devinfo(DeviceClass * dc)116 static void qdev_print_devinfo(DeviceClass *dc)
117 {
118 qemu_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
119 if (dc->bus_type) {
120 qemu_printf(", bus %s", dc->bus_type);
121 }
122 if (qdev_class_has_alias(dc)) {
123 qemu_printf(", alias \"%s\"", qdev_class_get_alias(dc));
124 }
125 if (dc->desc) {
126 qemu_printf(", desc \"%s\"", dc->desc);
127 }
128 if (!dc->user_creatable) {
129 qemu_printf(", no-user");
130 }
131 qemu_printf("\n");
132 }
133
qdev_print_devinfos(bool show_no_user)134 static void qdev_print_devinfos(bool show_no_user)
135 {
136 static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
137 [DEVICE_CATEGORY_BRIDGE] = "Controller/Bridge/Hub",
138 [DEVICE_CATEGORY_USB] = "USB",
139 [DEVICE_CATEGORY_STORAGE] = "Storage",
140 [DEVICE_CATEGORY_NETWORK] = "Network",
141 [DEVICE_CATEGORY_INPUT] = "Input",
142 [DEVICE_CATEGORY_DISPLAY] = "Display",
143 [DEVICE_CATEGORY_SOUND] = "Sound",
144 [DEVICE_CATEGORY_MISC] = "Misc",
145 [DEVICE_CATEGORY_CPU] = "CPU",
146 [DEVICE_CATEGORY_MAX] = "Uncategorized",
147 };
148 GSList *list, *elt;
149 int i;
150 bool cat_printed;
151
152 module_load_qom_all();
153 list = object_class_get_list_sorted(TYPE_DEVICE, false);
154
155 for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
156 cat_printed = false;
157 for (elt = list; elt; elt = elt->next) {
158 DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
159 TYPE_DEVICE);
160 if ((i < DEVICE_CATEGORY_MAX
161 ? !test_bit(i, dc->categories)
162 : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
163 || (!show_no_user
164 && !dc->user_creatable)) {
165 continue;
166 }
167 if (!cat_printed) {
168 qemu_printf("%s%s devices:\n", i ? "\n" : "", cat_name[i]);
169 cat_printed = true;
170 }
171 qdev_print_devinfo(dc);
172 }
173 }
174
175 g_slist_free(list);
176 }
177
set_property(void * opaque,const char * name,const char * value,Error ** errp)178 static int set_property(void *opaque, const char *name, const char *value,
179 Error **errp)
180 {
181 Object *obj = opaque;
182
183 if (strcmp(name, "driver") == 0)
184 return 0;
185 if (strcmp(name, "bus") == 0)
186 return 0;
187
188 if (!object_property_parse(obj, name, value, errp)) {
189 return -1;
190 }
191 return 0;
192 }
193
find_typename_by_alias(const char * alias)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
qdev_get_device_class(const char ** driver,Error ** errp)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 = module_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 = module_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
qdev_device_help(QemuOpts * opts)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 qemu_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
qdev_get_peripheral(void)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
qdev_get_peripheral_anon(void)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
qbus_error_append_bus_list_hint(DeviceState * dev,Error * const * errp)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
qbus_error_append_dev_list_hint(BusState * bus,Error * const * errp)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
qbus_find_bus(DeviceState * dev,char * elem)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
qbus_find_dev(BusState * bus,char * elem)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
qbus_is_full(BusState * bus)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 */
qbus_find_recursive(BusState * bus,const char * name,const char * bus_typename)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
qbus_find(const char * path,Error ** errp)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
qdev_set_id(DeviceState * dev,const char * id)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
is_failover_device(void * opaque,const char * name,const char * value,Error ** errp)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
should_hide_device(QemuOpts * opts)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
qdev_device_add(QemuOpts * opts,Error ** errp)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 bool hide;
604
605 driver = qemu_opt_get(opts, "driver");
606 if (!driver) {
607 error_setg(errp, QERR_MISSING_PARAMETER, "driver");
608 return NULL;
609 }
610
611 /* find driver */
612 dc = qdev_get_device_class(&driver, errp);
613 if (!dc) {
614 return NULL;
615 }
616
617 /* find bus */
618 path = qemu_opt_get(opts, "bus");
619 if (path != NULL) {
620 bus = qbus_find(path, errp);
621 if (!bus) {
622 return NULL;
623 }
624 if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
625 error_setg(errp, "Device '%s' can't go on %s bus",
626 driver, object_get_typename(OBJECT(bus)));
627 return NULL;
628 }
629 } else if (dc->bus_type != NULL) {
630 bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
631 if (!bus || qbus_is_full(bus)) {
632 error_setg(errp, "No '%s' bus found for device '%s'",
633 dc->bus_type, driver);
634 return NULL;
635 }
636 }
637 hide = should_hide_device(opts);
638
639 if ((hide || qdev_hotplug) && bus && !qbus_is_hotpluggable(bus)) {
640 error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
641 return NULL;
642 }
643
644 if (hide) {
645 return NULL;
646 }
647
648 if (!migration_is_idle()) {
649 error_setg(errp, "device_add not allowed while migrating");
650 return NULL;
651 }
652
653 /* create device */
654 dev = qdev_new(driver);
655
656 /* Check whether the hotplug is allowed by the machine */
657 if (qdev_hotplug && !qdev_hotplug_allowed(dev, errp)) {
658 goto err_del_dev;
659 }
660
661 if (!bus && qdev_hotplug && !qdev_get_machine_hotplug_handler(dev)) {
662 /* No bus, no machine hotplug handler --> device is not hotpluggable */
663 error_setg(errp, "Device '%s' can not be hotplugged on this machine",
664 driver);
665 goto err_del_dev;
666 }
667
668 qdev_set_id(dev, qemu_opts_id(opts));
669
670 /* set properties */
671 if (qemu_opt_foreach(opts, set_property, dev, errp)) {
672 goto err_del_dev;
673 }
674
675 dev->opts = opts;
676 if (!qdev_realize(DEVICE(dev), bus, errp)) {
677 dev->opts = NULL;
678 goto err_del_dev;
679 }
680 return dev;
681
682 err_del_dev:
683 if (dev) {
684 object_unparent(OBJECT(dev));
685 object_unref(OBJECT(dev));
686 }
687 return NULL;
688 }
689
690
691 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
692 static void qbus_print(Monitor *mon, BusState *bus, int indent);
693
qdev_print_props(Monitor * mon,DeviceState * dev,Property * props,int indent)694 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
695 int indent)
696 {
697 if (!props)
698 return;
699 for (; props->name; props++) {
700 char *value;
701 char *legacy_name = g_strdup_printf("legacy-%s", props->name);
702
703 if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
704 value = object_property_get_str(OBJECT(dev), legacy_name, NULL);
705 } else {
706 value = object_property_print(OBJECT(dev), props->name, true,
707 NULL);
708 }
709 g_free(legacy_name);
710
711 if (!value) {
712 continue;
713 }
714 qdev_printf("%s = %s\n", props->name,
715 *value ? value : "<null>");
716 g_free(value);
717 }
718 }
719
bus_print_dev(BusState * bus,Monitor * mon,DeviceState * dev,int indent)720 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
721 {
722 BusClass *bc = BUS_GET_CLASS(bus);
723
724 if (bc->print_dev) {
725 bc->print_dev(mon, dev, indent);
726 }
727 }
728
qdev_print(Monitor * mon,DeviceState * dev,int indent)729 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
730 {
731 ObjectClass *class;
732 BusState *child;
733 NamedGPIOList *ngl;
734 NamedClockList *ncl;
735
736 qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
737 dev->id ? dev->id : "");
738 indent += 2;
739 QLIST_FOREACH(ngl, &dev->gpios, node) {
740 if (ngl->num_in) {
741 qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
742 ngl->num_in);
743 }
744 if (ngl->num_out) {
745 qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
746 ngl->num_out);
747 }
748 }
749 QLIST_FOREACH(ncl, &dev->clocks, node) {
750 qdev_printf("clock-%s%s \"%s\" freq_hz=%e\n",
751 ncl->output ? "out" : "in",
752 ncl->alias ? " (alias)" : "",
753 ncl->name,
754 CLOCK_PERIOD_TO_HZ(1.0 * clock_get(ncl->clock)));
755 }
756 class = object_get_class(OBJECT(dev));
757 do {
758 qdev_print_props(mon, dev, DEVICE_CLASS(class)->props_, indent);
759 class = object_class_get_parent(class);
760 } while (class != object_class_by_name(TYPE_DEVICE));
761 bus_print_dev(dev->parent_bus, mon, dev, indent);
762 QLIST_FOREACH(child, &dev->child_bus, sibling) {
763 qbus_print(mon, child, indent);
764 }
765 }
766
qbus_print(Monitor * mon,BusState * bus,int indent)767 static void qbus_print(Monitor *mon, BusState *bus, int indent)
768 {
769 BusChild *kid;
770
771 qdev_printf("bus: %s\n", bus->name);
772 indent += 2;
773 qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
774 QTAILQ_FOREACH(kid, &bus->children, sibling) {
775 DeviceState *dev = kid->child;
776 qdev_print(mon, dev, indent);
777 }
778 }
779 #undef qdev_printf
780
hmp_info_qtree(Monitor * mon,const QDict * qdict)781 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
782 {
783 if (sysbus_get_default())
784 qbus_print(mon, sysbus_get_default(), 0);
785 }
786
hmp_info_qdm(Monitor * mon,const QDict * qdict)787 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
788 {
789 qdev_print_devinfos(true);
790 }
791
qmp_device_add(QDict * qdict,QObject ** ret_data,Error ** errp)792 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
793 {
794 QemuOpts *opts;
795 DeviceState *dev;
796
797 opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, errp);
798 if (!opts) {
799 return;
800 }
801 if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
802 qemu_opts_del(opts);
803 return;
804 }
805 dev = qdev_device_add(opts, errp);
806
807 /*
808 * Drain all pending RCU callbacks. This is done because
809 * some bus related operations can delay a device removal
810 * (in this case this can happen if device is added and then
811 * removed due to a configuration error)
812 * to a RCU callback, but user might expect that this interface
813 * will finish its job completely once qmp command returns result
814 * to the user
815 */
816 drain_call_rcu();
817
818 if (!dev) {
819 qemu_opts_del(opts);
820 return;
821 }
822 object_unref(OBJECT(dev));
823 }
824
find_device_state(const char * id,Error ** errp)825 static DeviceState *find_device_state(const char *id, Error **errp)
826 {
827 Object *obj;
828
829 if (id[0] == '/') {
830 obj = object_resolve_path(id, NULL);
831 } else {
832 char *root_path = object_get_canonical_path(qdev_get_peripheral());
833 char *path = g_strdup_printf("%s/%s", root_path, id);
834
835 g_free(root_path);
836 obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
837 g_free(path);
838 }
839
840 if (!obj) {
841 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
842 "Device '%s' not found", id);
843 return NULL;
844 }
845
846 if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
847 error_setg(errp, "%s is not a hotpluggable device", id);
848 return NULL;
849 }
850
851 return DEVICE(obj);
852 }
853
qdev_unplug(DeviceState * dev,Error ** errp)854 void qdev_unplug(DeviceState *dev, Error **errp)
855 {
856 DeviceClass *dc = DEVICE_GET_CLASS(dev);
857 HotplugHandler *hotplug_ctrl;
858 HotplugHandlerClass *hdc;
859 Error *local_err = NULL;
860
861 if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
862 error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
863 return;
864 }
865
866 if (!dc->hotpluggable) {
867 error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
868 object_get_typename(OBJECT(dev)));
869 return;
870 }
871
872 if (!migration_is_idle() && !dev->allow_unplug_during_migration) {
873 error_setg(errp, "device_del not allowed while migrating");
874 return;
875 }
876
877 qdev_hot_removed = true;
878
879 hotplug_ctrl = qdev_get_hotplug_handler(dev);
880 /* hotpluggable device MUST have HotplugHandler, if it doesn't
881 * then something is very wrong with it */
882 g_assert(hotplug_ctrl);
883
884 /* If device supports async unplug just request it to be done,
885 * otherwise just remove it synchronously */
886 hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
887 if (hdc->unplug_request) {
888 hotplug_handler_unplug_request(hotplug_ctrl, dev, &local_err);
889 } else {
890 hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
891 if (!local_err) {
892 object_unparent(OBJECT(dev));
893 }
894 }
895 error_propagate(errp, local_err);
896 }
897
qmp_device_del(const char * id,Error ** errp)898 void qmp_device_del(const char *id, Error **errp)
899 {
900 DeviceState *dev = find_device_state(id, errp);
901 if (dev != NULL) {
902 if (dev->pending_deleted_event) {
903 error_setg(errp, "Device %s is already in the "
904 "process of unplug", id);
905 return;
906 }
907
908 qdev_unplug(dev, errp);
909 }
910 }
911
hmp_device_add(Monitor * mon,const QDict * qdict)912 void hmp_device_add(Monitor *mon, const QDict *qdict)
913 {
914 Error *err = NULL;
915
916 qmp_device_add((QDict *)qdict, NULL, &err);
917 hmp_handle_error(mon, err);
918 }
919
hmp_device_del(Monitor * mon,const QDict * qdict)920 void hmp_device_del(Monitor *mon, const QDict *qdict)
921 {
922 const char *id = qdict_get_str(qdict, "id");
923 Error *err = NULL;
924
925 qmp_device_del(id, &err);
926 hmp_handle_error(mon, err);
927 }
928
blk_by_qdev_id(const char * id,Error ** errp)929 BlockBackend *blk_by_qdev_id(const char *id, Error **errp)
930 {
931 DeviceState *dev;
932 BlockBackend *blk;
933
934 dev = find_device_state(id, errp);
935 if (dev == NULL) {
936 return NULL;
937 }
938
939 blk = blk_by_dev(dev);
940 if (!blk) {
941 error_setg(errp, "Device does not have a block device backend");
942 }
943 return blk;
944 }
945
qdev_machine_init(void)946 void qdev_machine_init(void)
947 {
948 qdev_get_peripheral_anon();
949 qdev_get_peripheral();
950 }
951
952 QemuOptsList qemu_device_opts = {
953 .name = "device",
954 .implied_opt_name = "driver",
955 .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
956 .desc = {
957 /*
958 * no elements => accept any
959 * sanity checking will happen later
960 * when setting device properties
961 */
962 { /* end of list */ }
963 },
964 };
965
966 QemuOptsList qemu_global_opts = {
967 .name = "global",
968 .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
969 .desc = {
970 {
971 .name = "driver",
972 .type = QEMU_OPT_STRING,
973 },{
974 .name = "property",
975 .type = QEMU_OPT_STRING,
976 },{
977 .name = "value",
978 .type = QEMU_OPT_STRING,
979 },
980 { /* end of list */ }
981 },
982 };
983
qemu_global_option(const char * str)984 int qemu_global_option(const char *str)
985 {
986 char driver[64], property[64];
987 QemuOpts *opts;
988 int rc, offset;
989
990 rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
991 if (rc == 2 && str[offset] == '=') {
992 opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
993 qemu_opt_set(opts, "driver", driver, &error_abort);
994 qemu_opt_set(opts, "property", property, &error_abort);
995 qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
996 return 0;
997 }
998
999 opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
1000 if (!opts) {
1001 return -1;
1002 }
1003
1004 return 0;
1005 }
1006