aboutsummaryrefslogtreecommitdiff
path: root/qapi/qom.json
blob: fa56083a0b77e9b9cbf3ba7f5db179b1339c8286 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
# -*- Mode: Python -*-
# vim: filetype=python
#
# This work is licensed under the terms of the GNU GPL, version 2 or later.
# See the COPYING file in the top-level directory.

{ 'include': 'authz.json' }
{ 'include': 'block-core.json' }
{ 'include': 'common.json' }

##
# = QEMU Object Model (QOM)
##

##
# @ObjectPropertyInfo:
#
# @name: the name of the property
#
# @type: the type of the property.  This will typically come in one of four
#        forms:
#
#        1) A primitive type such as 'u8', 'u16', 'bool', 'str', or 'double'.
#           These types are mapped to the appropriate JSON type.
#
#        2) A child type in the form 'child<subtype>' where subtype is a qdev
#           device type name.  Child properties create the composition tree.
#
#        3) A link type in the form 'link<subtype>' where subtype is a qdev
#           device type name.  Link properties form the device model graph.
#
# @description: if specified, the description of the property.
#
# @default-value: the default value, if any (since 5.0)
#
# Since: 1.2
##
{ 'struct': 'ObjectPropertyInfo',
  'data': { 'name': 'str',
            'type': 'str',
            '*description': 'str',
            '*default-value': 'any' } }

##
# @qom-list:
#
# This command will list any properties of a object given a path in the object
# model.
#
# @path: the path within the object model.  See @qom-get for a description of
#        this parameter.
#
# Returns: a list of @ObjectPropertyInfo that describe the properties of the
#          object.
#
# Since: 1.2
#
# Example:
#
# -> { "execute": "qom-list",
#      "arguments": { "path": "/chardevs" } }
# <- { "return": [ { "name": "type", "type": "string" },
#                  { "name": "parallel0", "type": "child<chardev-vc>" },
#                  { "name": "serial0", "type": "child<chardev-vc>" },
#                  { "name": "mon0", "type": "child<chardev-stdio>" } ] }
#
##
{ 'command': 'qom-list',
  'data': { 'path': 'str' },
  'returns': [ 'ObjectPropertyInfo' ],
  'allow-preconfig': true }

##
# @qom-get:
#
# This command will get a property from a object model path and return the
# value.
#
# @path: The path within the object model.  There are two forms of supported
#        paths--absolute and partial paths.
#
#        Absolute paths are derived from the root object and can follow child<>
#        or link<> properties.  Since they can follow link<> properties, they
#        can be arbitrarily long.  Absolute paths look like absolute filenames
#        and are prefixed  with a leading slash.
#
#        Partial paths look like relative filenames.  They do not begin
#        with a prefix.  The matching rules for partial paths are subtle but
#        designed to make specifying objects easy.  At each level of the
#        composition tree, the partial path is matched as an absolute path.
#        The first match is not returned.  At least two matches are searched
#        for.  A successful result is only returned if only one match is
#        found.  If more than one match is found, a flag is return to
#        indicate that the match was ambiguous.
#
# @property: The property name to read
#
# Returns: The property value.  The type depends on the property
#          type. child<> and link<> properties are returned as #str
#          pathnames.  All integer property types (u8, u16, etc) are
#          returned as #int.
#
# Since: 1.2
#
# Example:
#
# 1. Use absolute path
#
# -> { "execute": "qom-get",
#      "arguments": { "path": "/machine/unattached/device[0]",
#                     "property": "hotplugged" } }
# <- { "return": false }
#
# 2. Use partial path
#
# -> { "execute": "qom-get",
#      "arguments": { "path": "unattached/sysbus",
#                     "property": "type" } }
# <- { "return": "System" }
#
##
{ 'command': 'qom-get',
  'data': { 'path': 'str', 'property': 'str' },
  'returns': 'any',
  'allow-preconfig': true }

##
# @qom-set:
#
# This command will set a property from a object model path.
#
# @path: see @qom-get for a description of this parameter
#
# @property: the property name to set
#
# @value: a value who's type is appropriate for the property type.  See @qom-get
#         for a description of type mapping.
#
# Since: 1.2
#
# Example:
#
# -> { "execute": "qom-set",
#      "arguments": { "path": "/machine",
#                     "property": "graphics",
#                     "value": false } }
# <- { "return": {} }
#
##
{ 'command': 'qom-set',
  'data': { 'path': 'str', 'property': 'str', 'value': 'any' },
  'allow-preconfig': true }

##
# @ObjectTypeInfo:
#
# This structure describes a search result from @qom-list-types
#
# @name: the type name found in the search
#
# @abstract: the type is abstract and can't be directly instantiated.
#            Omitted if false. (since 2.10)
#
# @parent: Name of parent type, if any (since 2.10)
#
# Since: 1.1
##
{ 'struct': 'ObjectTypeInfo',
  'data': { 'name': 'str', '*abstract': 'bool', '*parent': 'str' } }

##
# @qom-list-types:
#
# This command will return a list of types given search parameters
#
# @implements: if specified, only return types that implement this type name
#
# @abstract: if true, include abstract types in the results
#
# Returns: a list of @ObjectTypeInfo or an empty list if no results are found
#
# Since: 1.1
##
{ 'command': 'qom-list-types',
  'data': { '*implements': 'str', '*abstract': 'bool' },
  'returns': [ 'ObjectTypeInfo' ],
  'allow-preconfig': true }

##
# @qom-list-properties:
#
# List properties associated with a QOM object.
#
# @typename: the type name of an object
#
# Note: objects can create properties at runtime, for example to describe
#       links between different devices and/or objects. These properties
#       are not included in the output of this command.
#
# Returns: a list of ObjectPropertyInfo describing object properties
#
# Since: 2.12
##
{ 'command': 'qom-list-properties',
  'data': { 'typename': 'str'},
  'returns': [ 'ObjectPropertyInfo' ],
  'allow-preconfig': true }

##
# @CryptodevBackendProperties:
#
# Properties for cryptodev-backend and cryptodev-backend-builtin objects.
#
# @queues: the number of queues for the cryptodev backend. Ignored for
#          cryptodev-backend and must be 1 for cryptodev-backend-builtin.
#          (default: 1)
#
# Since: 2.8
##
{ 'struct': 'CryptodevBackendProperties',
  'data': { '*queues': 'uint32' } }

##
# @CryptodevVhostUserProperties:
#
# Properties for cryptodev-vhost-user objects.
#
# @chardev: the name of a Unix domain socket character device that connects to
#           the vhost-user server
#
# Since: 2.12
##
{ 'struct': 'CryptodevVhostUserProperties',
  'base': 'CryptodevBackendProperties',
  'data': { 'chardev': 'str' } }

##
# @DBusVMStateProperties:
#
# Properties for dbus-vmstate objects.
#
# @addr: the name of the DBus bus to connect to
#
# @id-list: a comma separated list of DBus IDs of helpers whose data should be
#           included in the VM state on migration
#
# Since: 5.0
##
{ 'struct': 'DBusVMStateProperties',
  'data': { 'addr': 'str' ,
            '*id-list': 'str' } }

##
# @IothreadProperties:
#
# Properties for iothread objects.
#
# @poll-max-ns: the maximum number of nanoseconds to busy wait for events.
#               0 means polling is disabled (default: 32768 on POSIX hosts,
#               0 otherwise)
#
# @poll-grow: the multiplier used to increase the polling time when the
#             algorithm detects it is missing events due to not polling long
#             enough. 0 selects a default behaviour (default: 0)
#
# @poll-shrink: the divisor used to decrease the polling time when the
#               algorithm detects it is spending too long polling without
#               encountering events. 0 selects a default behaviour (default: 0)
#
# Since: 2.0
##
{ 'struct': 'IothreadProperties',
  'data': { '*poll-max-ns': 'int',
            '*poll-grow': 'int',
            '*poll-shrink': 'int' } }

##
# @MemoryBackendProperties:
#
# Properties for objects of classes derived from memory-backend.
#
# @merge: if true, mark the memory as mergeable (default depends on the machine
#         type)
#
# @dump: if true, include the memory in core dumps (default depends on the
#        machine type)
#
# @host-nodes: the list of NUMA host nodes to bind the memory to
#
# @policy: the NUMA policy (default: 'default')
#
# @prealloc: if true, preallocate memory (default: false)
#
# @prealloc-threads: number of CPU threads to use for prealloc (default: 1)
#
# @share: if false, the memory is private to QEMU; if true, it is shared
#         (default: false)
#
# @size: size of the memory region in bytes
#
# @x-use-canonical-path-for-ramblock-id: if true, the canoncial path is used
#                                        for ramblock-id. Disable this for 4.0
#                                        machine types or older to allow
#                                        migration with newer QEMU versions.
#                                        This option is considered stable
#                                        despite the x- prefix. (default:
#                                        false generally, but true for machine
#                                        types <= 4.0)
#
# Since: 2.1
##
{ 'struct': 'MemoryBackendProperties',
  'data': { '*dump': 'bool',
            '*host-nodes': ['uint16'],
            '*merge': 'bool',
            '*policy': 'HostMemPolicy',
            '*prealloc': 'bool',
            '*prealloc-threads': 'uint32',
            '*share': 'bool',
            'size': 'size',
            '*x-use-canonical-path-for-ramblock-id': 'bool' } }

##
# @MemoryBackendFileProperties:
#
# Properties for memory-backend-file objects.
#
# @align: the base address alignment when QEMU mmap(2)s @mem-path. Some
#         backend stores specified by @mem-path require an alignment different
#         than the default one used by QEMU, e.g. the device DAX /dev/dax0.0
#         requires 2M alignment rather than 4K. In such cases, users can
#         specify the required alignment via this option.
#         0 selects a default alignment (currently the page size). (default: 0)
#
# @discard-data: if true, the file contents can be destroyed when QEMU exits,
#                to avoid unnecessarily flushing data to the backing file. Note
#                that ``discard-data`` is only an optimization, and QEMU might
#                not discard file contents if it aborts unexpectedly or is
#                terminated using SIGKILL. (default: false)
#
# @mem-path: the path to either a shared memory or huge page filesystem mount
#
# @pmem: specifies whether the backing file specified by @mem-path is in
#        host persistent memory that can be accessed using the SNIA NVM
#        programming model (e.g. Intel NVDIMM).
#
# @readonly: if true, the backing file is opened read-only; if false, it is
#            opened read-write. (default: false)
#
# Since: 2.1
##
{ 'struct': 'MemoryBackendFileProperties',
  'base': 'MemoryBackendProperties',
  'data': { '*align': 'size',
            '*discard-data': 'bool',
            'mem-path': 'str',
            '*pmem': { 'type': 'bool', 'if': 'defined(CONFIG_LIBPMEM)' },
            '*readonly': 'bool' } }

##
# @MemoryBackendMemfdProperties:
#
# Properties for memory-backend-memfd objects.
#
# The @share boolean option is true by default with memfd.
#
# @hugetlb: if true, the file to be created resides in the hugetlbfs filesystem
#           (default: false)
#
# @hugetlbsize: the hugetlb page size on systems that support multiple hugetlb
#               page sizes (it must be a power of 2 value supported by the
#               system). 0 selects a default page size. This option is ignored
#               if @hugetlb is false. (default: 0)
#
# @seal: if true, create a sealed-file, which will block further resizing of
#        the memory (default: true)
#
# Since: 2.12
##
{ 'struct': 'MemoryBackendMemfdProperties',
  'base': 'MemoryBackendProperties',
  'data': { '*hugetlb': 'bool',
            '*hugetlbsize': 'size',
            '*seal': 'bool' } }

##
# @RngProperties:
#
# Properties for objects of classes derived from rng.
#
# @opened: if true, the device is opened immediately when applying this option
#          and will probably fail when processing the next option. Don't use;
#          only provided for compatibility. (default: false)
#
# Features:
# @deprecated: Member @opened is deprecated.  Setting true doesn't make sense,
#              and false is already the default.
#
# Since: 1.3
##
{ 'struct': 'RngProperties',
  'data': { '*opened': { 'type': 'bool', 'features': ['deprecated'] } } }

##
# @RngEgdProperties:
#
# Properties for rng-egd objects.
#
# @chardev: the name of a character device backend that provides the connection
#           to the RNG daemon
#
# Since: 1.3
##
{ 'struct': 'RngEgdProperties',
  'base': 'RngProperties',
  'data': { 'chardev': 'str' } }

##
# @RngRandomProperties:
#
# Properties for rng-random objects.
#
# @filename: the filename of the device on the host to obtain entropy from
#            (default: "/dev/urandom")
#
# Since: 1.3
##
{ 'struct': 'RngRandomProperties',
  'base': 'RngProperties',
  'data': { '*filename': 'str' } }

##
# @ObjectType:
#
# Since: 6.0
##
{ 'enum': 'ObjectType',
  'data': [
    'authz-list',
    'authz-listfile',
    'authz-pam',
    'authz-simple',
    'cryptodev-backend',
    'cryptodev-backend-builtin',
    { 'name': 'cryptodev-vhost-user',
      'if': 'defined(CONFIG_VIRTIO_CRYPTO) && defined(CONFIG_VHOST_CRYPTO)' },
    'dbus-vmstate',
    'iothread',
    'memory-backend-file',
    { 'name': 'memory-backend-memfd',
      'if': 'defined(CONFIG_LINUX)' },
    'memory-backend-ram',
    'rng-builtin',
    'rng-egd',
    'rng-random',
    'throttle-group'
  ] }

##
# @ObjectOptions:
#
# Describes the options of a user creatable QOM object.
#
# @qom-type: the class name for the object to be created
#
# @id: the name of the new object
#
# Since: 6.0
##
{ 'union': 'ObjectOptions',
  'base': { 'qom-type': 'ObjectType',
            'id': 'str' },
  'discriminator': 'qom-type',
  'data': {
      'authz-list':                 'AuthZListProperties',
      'authz-listfile':             'AuthZListFileProperties',
      'authz-pam':                  'AuthZPAMProperties',
      'authz-simple':               'AuthZSimpleProperties',
      'cryptodev-backend':          'CryptodevBackendProperties',
      'cryptodev-backend-builtin':  'CryptodevBackendProperties',
      'cryptodev-vhost-user':       { 'type': 'CryptodevVhostUserProperties',
                                      'if': 'defined(CONFIG_VIRTIO_CRYPTO) && defined(CONFIG_VHOST_CRYPTO)' },
      'dbus-vmstate':               'DBusVMStateProperties',
      'iothread':                   'IothreadProperties',
      'memory-backend-file':        'MemoryBackendFileProperties',
      'memory-backend-memfd':       { 'type': 'MemoryBackendMemfdProperties',
                                      'if': 'defined(CONFIG_LINUX)' },
      'memory-backend-ram':         'MemoryBackendProperties',
      'rng-builtin':                'RngProperties',
      'rng-egd':                    'RngEgdProperties',
      'rng-random':                 'RngRandomProperties',
      'throttle-group':             'ThrottleGroupProperties'
  } }

##
# @object-add:
#
# Create a QOM object.
#
# @qom-type: the class name for the object to be created
#
# @id: the name of the new object
#
# Additional arguments depend on qom-type and are passed to the backend
# unchanged.
#
# Returns: Nothing on success
#          Error if @qom-type is not a valid class name
#
# Since: 2.0
#
# Example:
#
# -> { "execute": "object-add",
#      "arguments": { "qom-type": "rng-random", "id": "rng1",
#                     "filename": "/dev/hwrng" } }
# <- { "return": {} }
#
##
{ 'command': 'object-add',
  'data': {'qom-type': 'str', 'id': 'str'},
  'gen': false } # so we can get the additional arguments

##
# @object-del:
#
# Remove a QOM object.
#
# @id: the name of the QOM object to remove
#
# Returns: Nothing on success
#          Error if @id is not a valid id for a QOM object
#
# Since: 2.0
#
# Example:
#
# -> { "execute": "object-del", "arguments": { "id": "rng1" } }
# <- { "return": {} }
#
##
{ 'command': 'object-del', 'data': {'id': 'str'} }