qmp-commands.hx

   1 HXCOMM QMP dispatch table and documentation
   2 HXCOMM Text between SQMP and EQMP is copied to the QMP documention file and
   3 HXCOMM does not show up in the other formats.
   4
   5 SQMP
   6                         QMP Supported Commands
   7                         ----------------------
   8
   9 This document describes all commands currently supported by QMP.
  10
  11 Most of the time their usage is exactly the same as in the user Monitor, this
  12 means that any other document which also describe commands (the manpage,
  13 QEMU's manual, etc) can and should be consulted.
  14
  15 QMP has two types of commands: regular and query commands. Regular commands
  16 usually change the Virtual Machine's state someway, while query commands just
  17 return information. The sections below are divided accordingly.
  18
  19 It's important to observe that all communication examples are formatted in
  20 a reader-friendly way, so that they're easier to understand. However, in real
  21 protocol usage, they're emitted as a single line.
  22
  23 Also, the following notation is used to denote data flow:
  24
  25 -> data issued by the Client
  26 <- Server data response
  27
  28 Please, refer to the QMP specification (QMP/qmp-spec.txt) for detailed
  29 information on the Server command and response formats.
  30
  31 NOTE: This document is temporary and will be replaced soon.
  32
  33 1. Stability Considerations
  34 ===========================
  35
  36 The current QMP command set (described in this file) may be useful for a
  37 number of use cases, however it's limited and several commands have bad
  38 defined semantics, specially with regard to command completion.
  39
  40 These problems are going to be solved incrementally in the next QEMU releases
  41 and we're going to establish a deprecation policy for badly defined commands.
  42
  43 If you're planning to adopt QMP, please observe the following:
  44
  45     1. The deprecation policy will take efect and be documented soon, please
  46        check the documentation of each used command as soon as a new release of
  47        QEMU is available
  48
  49     2. DO NOT rely on anything which is not explicit documented
  50
  51     3. Errors, in special, are not documented. Applications should NOT check
  52        for specific errors classes or data (it's strongly recommended to only
  53        check for the "error" key)
  54
  55 2. Regular Commands
  56 ===================
  57
  58 Server's responses in the examples below are always a success response, please
  59 refer to the QMP specification for more details on error responses.
  60
  61 EQMP
  62
  63     {
  64         .name       = "quit",
  65         .args_type  = "",
  66         .params     = "",
  67         .help       = "quit the emulator",
  68         .user_print = monitor_user_noop,
  69         .mhandler.cmd_new = do_quit,
  70     },
  71
  72 SQMP
  73 quit
  74 ----
  75
  76 Quit the emulator.
  77
  78 Arguments: None.
  79
  80 Example:
  81
  82 -> { "execute": "quit" }
  83 <- { "return": {} }
  84
  85 EQMP
  86
  87     {
  88         .name       = "eject",
  89         .args_type  = "force:-f,device:B",
  90         .params     = "[-f] device",
  91         .help       = "eject a removable medium (use -f to force it)",
  92         .user_print = monitor_user_noop,
  93         .mhandler.cmd_new = do_eject,
  94     },
  95
  96 SQMP
  97 eject
  98 -----
  99
 100 Eject a removable medium.
 101
 102 Arguments:
 103
 104 - force: force ejection (json-bool, optional)
 105 - device: device name (json-string)
 106
 107 Example:
 108
 109 -> { "execute": "eject", "arguments": { "device": "ide1-cd0" } }
 110 <- { "return": {} }
 111
 112 Note: The "force" argument defaults to false.
 113
 114 EQMP
 115
 116     {
 117         .name       = "change",
 118         .args_type  = "device:B,target:F,arg:s?",
 119         .params     = "device filename [format]",
 120         .help       = "change a removable medium, optional format",
 121         .user_print = monitor_user_noop,
 122         .mhandler.cmd_new = do_change,
 123     },
 124
 125 SQMP
 126 change
 127 ------
 128
 129 Change a removable medium or VNC configuration.
 130
 131 Arguments:
 132
 133 - "device": device name (json-string)
 134 - "target": filename or item (json-string)
 135 - "arg": additional argument (json-string, optional)
 136
 137 Examples:
 138
 139 1. Change a removable medium
 140
 141 -> { "execute": "change",
 142              "arguments": { "device": "ide1-cd0",
 143                             "target": "/srv/images/Fedora-12-x86_64-DVD.iso" } }
 144 <- { "return": {} }
 145
 146 2. Change VNC password
 147
 148 -> { "execute": "change",
 149              "arguments": { "device": "vnc", "target": "password",
 150                             "arg": "foobar1" } }
 151 <- { "return": {} }
 152
 153 EQMP
 154
 155     {
 156         .name       = "screendump",
 157         .args_type  = "filename:F",
 158         .params     = "filename",
 159         .help       = "save screen into PPM image 'filename'",
 160         .user_print = monitor_user_noop,
 161         .mhandler.cmd_new = do_screen_dump,
 162     },
 163
 164 SQMP
 165 screendump
 166 ----------
 167
 168 Save screen into PPM image.
 169
 170 Arguments:
 171
 172 - "filename": file path (json-string)
 173
 174 Example:
 175
 176 -> { "execute": "screendump", "arguments": { "filename": "/tmp/image" } }
 177 <- { "return": {} }
 178
 179 EQMP
 180
 181     {
 182         .name       = "stop",
 183         .args_type  = "",
 184         .params     = "",
 185         .help       = "stop emulation",
 186         .user_print = monitor_user_noop,
 187         .mhandler.cmd_new = do_stop,
 188     },
 189
 190 SQMP
 191 stop
 192 ----
 193
 194 Stop the emulator.
 195
 196 Arguments: None.
 197
 198 Example:
 199
 200 -> { "execute": "stop" }
 201 <- { "return": {} }
 202
 203 EQMP
 204
 205     {
 206         .name       = "cont",
 207         .args_type  = "",
 208         .params     = "",
 209         .help       = "resume emulation",
 210         .user_print = monitor_user_noop,
 211         .mhandler.cmd_new = do_cont,
 212     },
 213
 214 SQMP
 215 cont
 216 ----
 217
 218 Resume emulation.
 219
 220 Arguments: None.
 221
 222 Example:
 223
 224 -> { "execute": "cont" }
 225 <- { "return": {} }
 226
 227 EQMP
 228
 229     {
 230         .name       = "system_reset",
 231         .args_type  = "",
 232         .params     = "",
 233         .help       = "reset the system",
 234         .user_print = monitor_user_noop,
 235         .mhandler.cmd_new = do_system_reset,
 236     },
 237
 238 SQMP
 239 system_reset
 240 ------------
 241
 242 Reset the system.
 243
 244 Arguments: None.
 245
 246 Example:
 247
 248 -> { "execute": "system_reset" }
 249 <- { "return": {} }
 250
 251 EQMP
 252
 253     {
 254         .name       = "system_powerdown",
 255         .args_type  = "",
 256         .params     = "",
 257         .help       = "send system power down event",
 258         .user_print = monitor_user_noop,
 259         .mhandler.cmd_new = do_system_powerdown,
 260     },
 261
 262 SQMP
 263 system_powerdown
 264 ----------------
 265
 266 Send system power down event.
 267
 268 Arguments: None.
 269
 270 Example:
 271
 272 -> { "execute": "system_powerdown" }
 273 <- { "return": {} }
 274
 275 EQMP
 276
 277     {
 278         .name       = "device_add",
 279         .args_type  = "device:O",
 280         .params     = "driver[,prop=value][,...]",
 281         .help       = "add device, like -device on the command line",
 282         .user_print = monitor_user_noop,
 283         .mhandler.cmd_new = do_device_add,
 284     },
 285
 286 SQMP
 287 device_add
 288 ----------
 289
 290 Add a device.
 291
 292 Arguments:
 293
 294 - "driver": the name of the new device's driver (json-string)
 295 - "bus": the device's parent bus (device tree path, json-string, optional)
 296 - "id": the device's ID, must be unique (json-string)
 297 - device properties
 298
 299 Example:
 300
 301 -> { "execute": "device_add", "arguments": { "driver": "e1000", "id": "net1" } }
 302 <- { "return": {} }
 303
 304 Notes:
 305
 306 (1) For detailed information about this command, please refer to the
 307     'docs/qdev-device-use.txt' file.
 308
 309 (2) It's possible to list device properties by running QEMU with the
 310     "-device DEVICE,\?" command-line argument, where DEVICE is the device's name
 311
 312 EQMP
 313
 314     {
 315         .name       = "device_del",
 316         .args_type  = "id:s",
 317         .params     = "device",
 318         .help       = "remove device",
 319         .user_print = monitor_user_noop,
 320         .mhandler.cmd_new = do_device_del,
 321     },
 322
 323 SQMP
 324 device_del
 325 ----------
 326
 327 Remove a device.
 328
 329 Arguments:
 330
 331 - "id": the device's ID (json-string)
 332
 333 Example:
 334
 335 -> { "execute": "device_del", "arguments": { "id": "net1" } }
 336 <- { "return": {} }
 337
 338 EQMP
 339
 340     {
 341         .name       = "cpu",
 342         .args_type  = "index:i",
 343         .params     = "index",
 344         .help       = "set the default CPU",
 345         .user_print = monitor_user_noop,
 346         .mhandler.cmd_new = do_cpu_set,
 347     },
 348
 349 SQMP
 350 cpu
 351 ---
 352
 353 Set the default CPU.
 354
 355 Arguments:
 356
 357 - "index": the CPU's index (json-int)
 358
 359 Example:
 360
 361 -> { "execute": "cpu", "arguments": { "index": 0 } }
 362 <- { "return": {} }
 363
 364 Note: CPUs' indexes are obtained with the 'query-cpus' command.
 365
 366 EQMP
 367
 368     {
 369         .name       = "memsave",
 370         .args_type  = "val:l,size:i,filename:s",
 371         .params     = "addr size file",
 372         .help       = "save to disk virtual memory dump starting at 'addr' of size 'size'",
 373         .user_print = monitor_user_noop,
 374         .mhandler.cmd_new = do_memory_save,
 375     },
 376
 377 SQMP
 378 memsave
 379 -------
 380
 381 Save to disk virtual memory dump starting at 'val' of size 'size'.
 382
 383 Arguments:
 384
 385 - "val": the starting address (json-int)
 386 - "size": the memory size, in bytes (json-int)
 387 - "filename": file path (json-string)
 388
 389 Example:
 390
 391 -> { "execute": "memsave",
 392              "arguments": { "val": 10,
 393                             "size": 100,
 394                             "filename": "/tmp/virtual-mem-dump" } }
 395 <- { "return": {} }
 396
 397 Note: Depends on the current CPU.
 398
 399 EQMP
 400
 401     {
 402         .name       = "pmemsave",
 403         .args_type  = "val:l,size:i,filename:s",
 404         .params     = "addr size file",
 405         .help       = "save to disk physical memory dump starting at 'addr' of size 'size'",
 406         .user_print = monitor_user_noop,
 407         .mhandler.cmd_new = do_physical_memory_save,
 408     },
 409
 410 SQMP
 411 pmemsave
 412 --------
 413
 414 Save to disk physical memory dump starting at 'val' of size 'size'.
 415
 416 Arguments:
 417
 418 - "val": the starting address (json-int)
 419 - "size": the memory size, in bytes (json-int)
 420 - "filename": file path (json-string)
 421
 422 Example:
 423
 424 -> { "execute": "pmemsave",
 425              "arguments": { "val": 10,
 426                             "size": 100,
 427                             "filename": "/tmp/physical-mem-dump" } }
 428 <- { "return": {} }
 429
 430 EQMP
 431
 432     {
 433         .name       = "migrate",
 434         .args_type  = "detach:-d,blk:-b,inc:-i,uri:s",
 435         .params     = "[-d] [-b] [-i] uri",
 436         .help       = "migrate to URI (using -d to not wait for completion)"
 437                       "\n\t\t\t -b for migration without shared storage with"
 438                       " full copy of disk\n\t\t\t -i for migration without "
 439                       "shared storage with incremental copy of disk "
 440                       "(base image shared between src and destination)",
 441         .user_print = monitor_user_noop,
 442         .mhandler.cmd_new = do_migrate,
 443     },
 444
 445 SQMP
 446 migrate
 447 -------
 448
 449 Migrate to URI.
 450
 451 Arguments:
 452
 453 - "blk": block migration, full disk copy (json-bool, optional)
 454 - "inc": incremental disk copy (json-bool, optional)
 455 - "uri": Destination URI (json-string)
 456
 457 Example:
 458
 459 -> { "execute": "migrate", "arguments": { "uri": "tcp:0:4446" } }
 460 <- { "return": {} }
 461
 462 Notes:
 463
 464 (1) The 'query-migrate' command should be used to check migration's progress
 465     and final result (this information is provided by the 'status' member)
 466 (2) All boolean arguments default to false
 467 (3) The user Monitor's "detach" argument is invalid in QMP and should not
 468     be used
 469
 470 EQMP
 471
 472     {
 473         .name       = "migrate_cancel",
 474         .args_type  = "",
 475         .params     = "",
 476         .help       = "cancel the current VM migration",
 477         .user_print = monitor_user_noop,
 478         .mhandler.cmd_new = do_migrate_cancel,
 479     },
 480
 481 SQMP
 482 migrate_cancel
 483 --------------
 484
 485 Cancel the current migration.
 486
 487 Arguments: None.
 488
 489 Example:
 490
 491 -> { "execute": "migrate_cancel" }
 492 <- { "return": {} }
 493
 494 EQMP
 495
 496     {
 497         .name       = "migrate_set_speed",
 498         .args_type  = "value:o",
 499         .params     = "value",
 500         .help       = "set maximum speed (in bytes) for migrations",
 501         .user_print = monitor_user_noop,
 502         .mhandler.cmd_new = do_migrate_set_speed,
 503     },
 504
 505 SQMP
 506 client_migrate_info
 507 ------------------
 508
 509 Set the spice/vnc connection info for the migration target.  The spice/vnc
 510 server will ask the spice/vnc client to automatically reconnect using the
 511 new parameters (if specified) once the vm migration finished successfully.
 512
 513 Arguments:
 514
 515 - "protocol":     protocol: "spice" or "vnc" (json-string)
 516 - "hostname":     migration target hostname (json-string)
 517 - "port":         spice/vnc tcp port for plaintext channels (json-int, optional)
 518 - "tls-port":     spice tcp port for tls-secured channels (json-int, optional)
 519 - "cert-subject": server certificate subject (json-string, optional)
 520
 521 Example:
 522
 523 -> { "execute": "client_migrate_info",
 524      "arguments": { "protocol": "spice",
 525                     "hostname": "virt42.lab.kraxel.org",
 526                     "port": 1234 } }
 527 <- { "return": {} }
 528
 529 EQMP
 530
 531     {
 532         .name       = "client_migrate_info",
 533         .args_type  = "protocol:s,hostname:s,port:i?,tls-port:i?,cert-subject:s?",
 534         .params     = "protocol hostname port tls-port cert-subject",
 535         .help       = "send migration info to spice/vnc client",
 536         .user_print = monitor_user_noop,
 537         .mhandler.cmd_new = client_migrate_info,
 538     },
 539
 540 SQMP
 541 migrate_set_speed
 542 -----------------
 543
 544 Set maximum speed for migrations.
 545
 546 Arguments:
 547
 548 - "value": maximum speed, in bytes per second (json-int)
 549
 550 Example:
 551
 552 -> { "execute": "migrate_set_speed", "arguments": { "value": 1024 } }
 553 <- { "return": {} }
 554
 555 EQMP
 556
 557     {
 558         .name       = "migrate_set_downtime",
 559         .args_type  = "value:T",
 560         .params     = "value",
 561         .help       = "set maximum tolerated downtime (in seconds) for migrations",
 562         .user_print = monitor_user_noop,
 563         .mhandler.cmd_new = do_migrate_set_downtime,
 564     },
 565
 566 SQMP
 567 migrate_set_downtime
 568 --------------------
 569
 570 Set maximum tolerated downtime (in seconds) for migrations.
 571
 572 Arguments:
 573
 574 - "value": maximum downtime (json-number)
 575
 576 Example:
 577
 578 -> { "execute": "migrate_set_downtime", "arguments": { "value": 0.1 } }
 579 <- { "return": {} }
 580
 581 EQMP
 582
 583     {
 584         .name       = "netdev_add",
 585         .args_type  = "netdev:O",
 586         .params     = "[user|tap|socket],id=str[,prop=value][,...]",
 587         .help       = "add host network device",
 588         .user_print = monitor_user_noop,
 589         .mhandler.cmd_new = do_netdev_add,
 590     },
 591
 592 SQMP
 593 netdev_add
 594 ----------
 595
 596 Add host network device.
 597
 598 Arguments:
 599
 600 - "type": the device type, "tap", "user", ... (json-string)
 601 - "id": the device's ID, must be unique (json-string)
 602 - device options
 603
 604 Example:
 605
 606 -> { "execute": "netdev_add", "arguments": { "type": "user", "id": "netdev1" } }
 607 <- { "return": {} }
 608
 609 Note: The supported device options are the same ones supported by the '-net'
 610       command-line argument, which are listed in the '-help' output or QEMU's
 611       manual
 612
 613 EQMP
 614
 615     {
 616         .name       = "netdev_del",
 617         .args_type  = "id:s",
 618         .params     = "id",
 619         .help       = "remove host network device",
 620         .user_print = monitor_user_noop,
 621         .mhandler.cmd_new = do_netdev_del,
 622     },
 623
 624 SQMP
 625 netdev_del
 626 ----------
 627
 628 Remove host network device.
 629
 630 Arguments:
 631
 632 - "id": the device's ID, must be unique (json-string)
 633
 634 Example:
 635
 636 -> { "execute": "netdev_del", "arguments": { "id": "netdev1" } }
 637 <- { "return": {} }
 638
 639
 640 EQMP
 641
 642     {
 643         .name       = "block_resize",
 644         .args_type  = "device:B,size:o",
 645         .params     = "device size",
 646         .help       = "resize a block image",
 647         .user_print = monitor_user_noop,
 648         .mhandler.cmd_new = do_block_resize,
 649     },
 650
 651 SQMP
 652 block_resize
 653 ------------
 654
 655 Resize a block image while a guest is running.
 656
 657 Arguments:
 658
 659 - "device": the device's ID, must be unique (json-string)
 660 - "size": new size
 661
 662 Example:
 663
 664 -> { "execute": "block_resize", "arguments": { "device": "scratch", "size": 1073741824 } }
 665 <- { "return": {} }
 666
 667 EQMP
 668
 669     {
 670         .name       = "balloon",
 671         .args_type  = "value:M",
 672         .params     = "target",
 673         .help       = "request VM to change its memory allocation (in MB)",
 674         .user_print = monitor_user_noop,
 675         .mhandler.cmd_async = do_balloon,
 676         .flags      = MONITOR_CMD_ASYNC,
 677     },
 678
 679 SQMP
 680 balloon
 681 -------
 682
 683 Request VM to change its memory allocation (in bytes).
 684
 685 Arguments:
 686
 687 - "value": New memory allocation (json-int)
 688
 689 Example:
 690
 691 -> { "execute": "balloon", "arguments": { "value": 536870912 } }
 692 <- { "return": {} }
 693
 694 EQMP
 695
 696     {
 697         .name       = "set_link",
 698         .args_type  = "name:s,up:b",
 699         .params     = "name on|off",
 700         .help       = "change the link status of a network adapter",
 701         .user_print = monitor_user_noop,
 702         .mhandler.cmd_new = do_set_link,
 703     },
 704
 705 SQMP
 706 set_link
 707 --------
 708
 709 Change the link status of a network adapter.
 710
 711 Arguments:
 712
 713 - "name": network device name (json-string)
 714 - "up": status is up (json-bool)
 715
 716 Example:
 717
 718 -> { "execute": "set_link", "arguments": { "name": "e1000.0", "up": false } }
 719 <- { "return": {} }
 720
 721 EQMP
 722
 723     {
 724         .name       = "getfd",
 725         .args_type  = "fdname:s",
 726         .params     = "getfd name",
 727         .help       = "receive a file descriptor via SCM rights and assign it a name",
 728         .user_print = monitor_user_noop,
 729         .mhandler.cmd_new = do_getfd,
 730     },
 731
 732 SQMP
 733 getfd
 734 -----
 735
 736 Receive a file descriptor via SCM rights and assign it a name.
 737
 738 Arguments:
 739
 740 - "fdname": file descriptor name (json-string)
 741
 742 Example:
 743
 744 -> { "execute": "getfd", "arguments": { "fdname": "fd1" } }
 745 <- { "return": {} }
 746
 747 EQMP
 748
 749     {
 750         .name       = "closefd",
 751         .args_type  = "fdname:s",
 752         .params     = "closefd name",
 753         .help       = "close a file descriptor previously passed via SCM rights",
 754         .user_print = monitor_user_noop,
 755         .mhandler.cmd_new = do_closefd,
 756     },
 757
 758 SQMP
 759 closefd
 760 -------
 761
 762 Close a file descriptor previously passed via SCM rights.
 763
 764 Arguments:
 765
 766 - "fdname": file descriptor name (json-string)
 767
 768 Example:
 769
 770 -> { "execute": "closefd", "arguments": { "fdname": "fd1" } }
 771 <- { "return": {} }
 772
 773 EQMP
 774
 775     {
 776         .name       = "block_passwd",
 777         .args_type  = "device:B,password:s",
 778         .params     = "block_passwd device password",
 779         .help       = "set the password of encrypted block devices",
 780         .user_print = monitor_user_noop,
 781         .mhandler.cmd_new = do_block_set_passwd,
 782     },
 783
 784 SQMP
 785 block_passwd
 786 ------------
 787
 788 Set the password of encrypted block devices.
 789
 790 Arguments:
 791
 792 - "device": device name (json-string)
 793 - "password": password (json-string)
 794
 795 Example:
 796
 797 -> { "execute": "block_passwd", "arguments": { "device": "ide0-hd0",
 798                                                "password": "12345" } }
 799 <- { "return": {} }
 800
 801 EQMP
 802
 803     {
 804         .name       = "set_password",
 805         .args_type  = "protocol:s,password:s,connected:s?",
 806         .params     = "protocol password action-if-connected",
 807         .help       = "set spice/vnc password",
 808         .user_print = monitor_user_noop,
 809         .mhandler.cmd_new = set_password,
 810     },
 811
 812 SQMP
 813 set_password
 814 ------------
 815
 816 Set the password for vnc/spice protocols.
 817
 818 Arguments:
 819
 820 - "protocol": protocol name (json-string)
 821 - "password": password (json-string)
 822 - "connected": [ keep | disconnect | fail ] (josn-string, optional)
 823
 824 Example:
 825
 826 -> { "execute": "set_password", "arguments": { "protocol": "vnc",
 827                                                "password": "secret" } }
 828 <- { "return": {} }
 829
 830 EQMP
 831
 832     {
 833         .name       = "expire_password",
 834         .args_type  = "protocol:s,time:s",
 835         .params     = "protocol time",
 836         .help       = "set spice/vnc password expire-time",
 837         .user_print = monitor_user_noop,
 838         .mhandler.cmd_new = expire_password,
 839     },
 840
 841 SQMP
 842 expire_password
 843 ---------------
 844
 845 Set the password expire time for vnc/spice protocols.
 846
 847 Arguments:
 848
 849 - "protocol": protocol name (json-string)
 850 - "time": [ now | never | +secs | secs ] (json-string)
 851
 852 Example:
 853
 854 -> { "execute": "expire_password", "arguments": { "protocol": "vnc",
 855                                                   "time": "+60" } }
 856 <- { "return": {} }
 857
 858 EQMP
 859
 860     {
 861         .name       = "qmp_capabilities",
 862         .args_type  = "",
 863         .params     = "",
 864         .help       = "enable QMP capabilities",
 865         .user_print = monitor_user_noop,
 866         .mhandler.cmd_new = do_qmp_capabilities,
 867     },
 868
 869 SQMP
 870 qmp_capabilities
 871 ----------------
 872
 873 Enable QMP capabilities.
 874
 875 Arguments: None.
 876
 877 Example:
 878
 879 -> { "execute": "qmp_capabilities" }
 880 <- { "return": {} }
 881
 882 Note: This command must be issued before issuing any other command.
 883
 884 EQMP
 885
 886     {
 887         .name       = "human-monitor-command",
 888         .args_type  = "command-line:s,cpu-index:i?",
 889         .params     = "",
 890         .help       = "",
 891         .user_print = monitor_user_noop,
 892         .mhandler.cmd_new = do_hmp_passthrough,
 893     },
 894
 895 SQMP
 896 human-monitor-command
 897 ---------------------
 898
 899 Execute a Human Monitor command.
 900
 901 Arguments:
 902
 903 - command-line: the command name and its arguments, just like the
 904                 Human Monitor's shell (json-string)
 905 - cpu-index: select the CPU number to be used by commands which access CPU
 906              data, like 'info registers'. The Monitor selects CPU 0 if this
 907              argument is not provided (json-int, optional)
 908
 909 Example:
 910
 911 -> { "execute": "human-monitor-command", "arguments": { "command-line": "info kvm" } }
 912 <- { "return": "kvm support: enabled\r\n" }
 913
 914 Notes:
 915
 916 (1) The Human Monitor is NOT an stable interface, this means that command
 917     names, arguments and responses can change or be removed at ANY time.
 918     Applications that rely on long term stability guarantees should NOT
 919     use this command
 920
 921 (2) Limitations:
 922
 923     o This command is stateless, this means that commands that depend
 924       on state information (such as getfd) might not work
 925
 926     o Commands that prompt the user for data (eg. 'cont' when the block
 927       device is encrypted) don't currently work
 928
 929 3. Query Commands
 930 =================
 931
 932 HXCOMM Each query command below is inside a SQMP/EQMP section, do NOT change
 933 HXCOMM this! We will possibly move query commands definitions inside those
 934 HXCOMM sections, just like regular commands.
 935
 936 EQMP
 937
 938 SQMP
 939 query-version
 940 -------------
 941
 942 Show QEMU version.
 943
 944 Return a json-object with the following information:
 945
 946 - "qemu": A json-object containing three integer values:
 947     - "major": QEMU's major version (json-int)
 948     - "minor": QEMU's minor version (json-int)
 949     - "micro": QEMU's micro version (json-int)
 950 - "package": package's version (json-string)
 951
 952 Example:
 953
 954 -> { "execute": "query-version" }
 955 <- {
 956       "return":{
 957          "qemu":{
 958             "major":0,
 959             "minor":11,
 960             "micro":5
 961          },
 962          "package":""
 963       }
 964    }
 965
 966 EQMP
 967
 968 SQMP
 969 query-commands
 970 --------------
 971
 972 List QMP available commands.
 973
 974 Each command is represented by a json-object, the returned value is a json-array
 975 of all commands.
 976
 977 Each json-object contain:
 978
 979 - "name": command's name (json-string)
 980
 981 Example:
 982
 983 -> { "execute": "query-commands" }
 984 <- {
 985       "return":[
 986          {
 987             "name":"query-balloon"
 988          },
 989          {
 990             "name":"system_powerdown"
 991          }
 992       ]
 993    }
 994
 995 Note: This example has been shortened as the real response is too long.
 996
 997 EQMP
 998
 999 SQMP
1000 query-chardev
1001 -------------
1002
1003 Each device is represented by a json-object. The returned value is a json-array
1004 of all devices.
1005
1006 Each json-object contain the following:
1007
1008 - "label": device's label (json-string)
1009 - "filename": device's file (json-string)
1010
1011 Example:
1012
1013 -> { "execute": "query-chardev" }
1014 <- {
1015       "return":[
1016          {
1017             "label":"monitor",
1018             "filename":"stdio"
1019          },
1020          {
1021             "label":"serial0",
1022             "filename":"vc"
1023          }
1024       ]
1025    }
1026
1027 EQMP
1028
1029 SQMP
1030 query-block
1031 -----------
1032
1033 Show the block devices.
1034
1035 Each block device information is stored in a json-object and the returned value
1036 is a json-array of all devices.
1037
1038 Each json-object contain the following:
1039
1040 - "device": device name (json-string)
1041 - "type": device type (json-string)
1042          - Possible values: "hd", "cdrom", "floppy", "unknown"
1043 - "removable": true if the device is removable, false otherwise (json-bool)
1044 - "locked": true if the device is locked, false otherwise (json-bool)
1045 - "inserted": only present if the device is inserted, it is a json-object
1046    containing the following:
1047          - "file": device file name (json-string)
1048          - "ro": true if read-only, false otherwise (json-bool)
1049          - "drv": driver format name (json-string)
1050              - Possible values: "blkdebug", "bochs", "cloop", "cow", "dmg",
1051                                 "file", "file", "ftp", "ftps", "host_cdrom",
1052                                 "host_device", "host_floppy", "http", "https",
1053                                 "nbd", "parallels", "qcow", "qcow2", "raw",
1054                                 "tftp", "vdi", "vmdk", "vpc", "vvfat"
1055          - "backing_file": backing file name (json-string, optional)
1056          - "encrypted": true if encrypted, false otherwise (json-bool)
1057
1058 Example:
1059
1060 -> { "execute": "query-block" }
1061 <- {
1062       "return":[
1063          {
1064             "device":"ide0-hd0",
1065             "locked":false,
1066             "removable":false,
1067             "inserted":{
1068                "ro":false,
1069                "drv":"qcow2",
1070                "encrypted":false,
1071                "file":"disks/test.img"
1072             },
1073             "type":"hd"
1074          },
1075          {
1076             "device":"ide1-cd0",
1077             "locked":false,
1078             "removable":true,
1079             "type":"cdrom"
1080          },
1081          {
1082             "device":"floppy0",
1083             "locked":false,
1084             "removable":true,
1085             "type": "floppy"
1086          },
1087          {
1088             "device":"sd0",
1089             "locked":false,
1090             "removable":true,
1091             "type":"floppy"
1092          }
1093       ]
1094    }
1095
1096 EQMP
1097
1098 SQMP
1099 query-blockstats
1100 ----------------
1101
1102 Show block device statistics.
1103
1104 Each device statistic information is stored in a json-object and the returned
1105 value is a json-array of all devices.
1106
1107 Each json-object contain the following:
1108
1109 - "device": device name (json-string)
1110 - "stats": A json-object with the statistics information, it contains:
1111     - "rd_bytes": bytes read (json-int)
1112     - "wr_bytes": bytes written (json-int)
1113     - "rd_operations": read operations (json-int)
1114     - "wr_operations": write operations (json-int)
1115     - "wr_highest_offset": Highest offset of a sector written since the
1116                            BlockDriverState has been opened (json-int)
1117 - "parent": Contains recursively the statistics of the underlying
1118             protocol (e.g. the host file for a qcow2 image). If there is
1119             no underlying protocol, this field is omitted
1120             (json-object, optional)
1121
1122 Example:
1123
1124 -> { "execute": "query-blockstats" }
1125 <- {
1126       "return":[
1127          {
1128             "device":"ide0-hd0",
1129             "parent":{
1130                "stats":{
1131                   "wr_highest_offset":3686448128,
1132                   "wr_bytes":9786368,
1133                   "wr_operations":751,
1134                   "rd_bytes":122567168,
1135                   "rd_operations":36772
1136                }
1137             },
1138             "stats":{
1139                "wr_highest_offset":2821110784,
1140                "wr_bytes":9786368,
1141                "wr_operations":692,
1142                "rd_bytes":122739200,
1143                "rd_operations":36604
1144             }
1145          },
1146          {
1147             "device":"ide1-cd0",
1148             "stats":{
1149                "wr_highest_offset":0,
1150                "wr_bytes":0,
1151                "wr_operations":0,
1152                "rd_bytes":0,
1153                "rd_operations":0
1154             }
1155          },
1156          {
1157             "device":"floppy0",
1158             "stats":{
1159                "wr_highest_offset":0,
1160                "wr_bytes":0,
1161                "wr_operations":0,
1162                "rd_bytes":0,
1163                "rd_operations":0
1164             }
1165          },
1166          {
1167             "device":"sd0",
1168             "stats":{
1169                "wr_highest_offset":0,
1170                "wr_bytes":0,
1171                "wr_operations":0,
1172                "rd_bytes":0,
1173                "rd_operations":0
1174             }
1175          }
1176       ]
1177    }
1178
1179 EQMP
1180
1181 SQMP
1182 query-cpus
1183 ----------
1184
1185 Show CPU information.
1186
1187 Return a json-array. Each CPU is represented by a json-object, which contains:
1188
1189 - "CPU": CPU index (json-int)
1190 - "current": true if this is the current CPU, false otherwise (json-bool)
1191 - "halted": true if the cpu is halted, false otherwise (json-bool)
1192 - Current program counter. The key's name depends on the architecture:
1193      "pc": i386/x86_64 (json-int)
1194      "nip": PPC (json-int)
1195      "pc" and "npc": sparc (json-int)
1196      "PC": mips (json-int)
1197 - "thread_id": ID of the underlying host thread (json-int)
1198
1199 Example:
1200
1201 -> { "execute": "query-cpus" }
1202 <- {
1203       "return":[
1204          {
1205             "CPU":0,
1206             "current":true,
1207             "halted":false,
1208             "pc":3227107138
1209             "thread_id":3134
1210          },
1211          {
1212             "CPU":1,
1213             "current":false,
1214             "halted":true,
1215             "pc":7108165
1216             "thread_id":3135
1217          }
1218       ]
1219    }
1220
1221 EQMP
1222
1223 SQMP
1224 query-pci
1225 ---------
1226
1227 PCI buses and devices information.
1228
1229 The returned value is a json-array of all buses. Each bus is represented by
1230 a json-object, which has a key with a json-array of all PCI devices attached
1231 to it. Each device is represented by a json-object.
1232
1233 The bus json-object contains the following:
1234
1235 - "bus": bus number (json-int)
1236 - "devices": a json-array of json-objects, each json-object represents a
1237              PCI device
1238
1239 The PCI device json-object contains the following:
1240
1241 - "bus": identical to the parent's bus number (json-int)
1242 - "slot": slot number (json-int)
1243 - "function": function number (json-int)
1244 - "class_info": a json-object containing:
1245      - "desc": device class description (json-string, optional)
1246      - "class": device class number (json-int)
1247 - "id": a json-object containing:
1248      - "device": device ID (json-int)
1249      - "vendor": vendor ID (json-int)
1250 - "irq": device's IRQ if assigned (json-int, optional)
1251 - "qdev_id": qdev id string (json-string)
1252 - "pci_bridge": It's a json-object, only present if this device is a
1253                 PCI bridge, contains:
1254      - "bus": bus number (json-int)
1255      - "secondary": secondary bus number (json-int)
1256      - "subordinate": subordinate bus number (json-int)
1257      - "io_range": I/O memory range information, a json-object with the
1258                    following members:
1259                  - "base": base address, in bytes (json-int)
1260                  - "limit": limit address, in bytes (json-int)
1261      - "memory_range": memory range information, a json-object with the
1262                        following members:
1263                  - "base": base address, in bytes (json-int)
1264                  - "limit": limit address, in bytes (json-int)
1265      - "prefetchable_range": Prefetchable memory range information, a
1266                              json-object with the following members:
1267                  - "base": base address, in bytes (json-int)
1268                  - "limit": limit address, in bytes (json-int)
1269      - "devices": a json-array of PCI devices if there's any attached, each
1270                   each element is represented by a json-object, which contains
1271                   the same members of the 'PCI device json-object' described
1272                   above (optional)
1273 - "regions": a json-array of json-objects, each json-object represents a
1274              memory region of this device
1275
1276 The memory range json-object contains the following:
1277
1278 - "base": base memory address (json-int)
1279 - "limit": limit value (json-int)
1280
1281 The region json-object can be an I/O region or a memory region, an I/O region
1282 json-object contains the following:
1283
1284 - "type": "io" (json-string, fixed)
1285 - "bar": BAR number (json-int)
1286 - "address": memory address (json-int)
1287 - "size": memory size (json-int)
1288
1289 A memory region json-object contains the following:
1290
1291 - "type": "memory" (json-string, fixed)
1292 - "bar": BAR number (json-int)
1293 - "address": memory address (json-int)
1294 - "size": memory size (json-int)
1295 - "mem_type_64": true or false (json-bool)
1296 - "prefetch": true or false (json-bool)
1297
1298 Example:
1299
1300 -> { "execute": "query-pci" }
1301 <- {
1302       "return":[
1303          {
1304             "bus":0,
1305             "devices":[
1306                {
1307                   "bus":0,
1308                   "qdev_id":"",
1309                   "slot":0,
1310                   "class_info":{
1311                      "class":1536,
1312                      "desc":"Host bridge"
1313                   },
1314                   "id":{
1315                      "device":32902,
1316                      "vendor":4663
1317                   },
1318                   "function":0,
1319                   "regions":[
1320
1321                   ]
1322                },
1323                {
1324                   "bus":0,
1325                   "qdev_id":"",
1326                   "slot":1,
1327                   "class_info":{
1328                      "class":1537,
1329                      "desc":"ISA bridge"
1330                   },
1331                   "id":{
1332                      "device":32902,
1333                      "vendor":28672
1334                   },
1335                   "function":0,
1336                   "regions":[
1337
1338                   ]
1339                },
1340                {
1341                   "bus":0,
1342                   "qdev_id":"",
1343                   "slot":1,
1344                   "class_info":{
1345                      "class":257,
1346                      "desc":"IDE controller"
1347                   },
1348                   "id":{
1349                      "device":32902,
1350                      "vendor":28688
1351                   },
1352                   "function":1,
1353                   "regions":[
1354                      {
1355                         "bar":4,
1356                         "size":16,
1357                         "address":49152,
1358                         "type":"io"
1359                      }
1360                   ]
1361                },
1362                {
1363                   "bus":0,
1364                   "qdev_id":"",
1365                   "slot":2,
1366                   "class_info":{
1367                      "class":768,
1368                      "desc":"VGA controller"
1369                   },
1370                   "id":{
1371                      "device":4115,
1372                      "vendor":184
1373                   },
1374                   "function":0,
1375                   "regions":[
1376                      {
1377                         "prefetch":true,
1378                         "mem_type_64":false,
1379                         "bar":0,
1380                         "size":33554432,
1381                         "address":4026531840,
1382                         "type":"memory"
1383                      },
1384                      {
1385                         "prefetch":false,
1386                         "mem_type_64":false,
1387                         "bar":1,
1388                         "size":4096,
1389                         "address":4060086272,
1390                         "type":"memory"
1391                      },
1392                      {
1393                         "prefetch":false,
1394                         "mem_type_64":false,
1395                         "bar":6,
1396                         "size":65536,
1397                         "address":-1,
1398                         "type":"memory"
1399                      }
1400                   ]
1401                },
1402                {
1403                   "bus":0,
1404                   "qdev_id":"",
1405                   "irq":11,
1406                   "slot":4,
1407                   "class_info":{
1408                      "class":1280,
1409                      "desc":"RAM controller"
1410                   },
1411                   "id":{
1412                      "device":6900,
1413                      "vendor":4098
1414                   },
1415                   "function":0,
1416                   "regions":[
1417                      {
1418                         "bar":0,
1419                         "size":32,
1420                         "address":49280,
1421                         "type":"io"
1422                      }
1423                   ]
1424                }
1425             ]
1426          }
1427       ]
1428    }
1429
1430 Note: This example has been shortened as the real response is too long.
1431
1432 EQMP
1433
1434 SQMP
1435 query-kvm
1436 ---------
1437
1438 Show KVM information.
1439
1440 Return a json-object with the following information:
1441
1442 - "enabled": true if KVM support is enabled, false otherwise (json-bool)
1443 - "present": true if QEMU has KVM support, false otherwise (json-bool)
1444
1445 Example:
1446
1447 -> { "execute": "query-kvm" }
1448 <- { "return": { "enabled": true, "present": true } }
1449
1450 EQMP
1451
1452 SQMP
1453 query-status
1454 ------------
1455
1456 Return a json-object with the following information:
1457
1458 - "running": true if the VM is running, or false if it is paused (json-bool)
1459 - "singlestep": true if the VM is in single step mode,
1460                 false otherwise (json-bool)
1461
1462 Example:
1463
1464 -> { "execute": "query-status" }
1465 <- { "return": { "running": true, "singlestep": false } }
1466
1467 EQMP
1468
1469 SQMP
1470 query-mice
1471 ----------
1472
1473 Show VM mice information.
1474
1475 Each mouse is represented by a json-object, the returned value is a json-array
1476 of all mice.
1477
1478 The mouse json-object contains the following:
1479
1480 - "name": mouse's name (json-string)
1481 - "index": mouse's index (json-int)
1482 - "current": true if this mouse is receiving events, false otherwise (json-bool)
1483 - "absolute": true if the mouse generates absolute input events (json-bool)
1484
1485 Example:
1486
1487 -> { "execute": "query-mice" }
1488 <- {
1489       "return":[
1490          {
1491             "name":"QEMU Microsoft Mouse",
1492             "index":0,
1493             "current":false,
1494             "absolute":false
1495          },
1496          {
1497             "name":"QEMU PS/2 Mouse",
1498             "index":1,
1499             "current":true,
1500             "absolute":true
1501          }
1502       ]
1503    }
1504
1505 EQMP
1506
1507 SQMP
1508 query-vnc
1509 ---------
1510
1511 Show VNC server information.
1512
1513 Return a json-object with server information. Connected clients are returned
1514 as a json-array of json-objects.
1515
1516 The main json-object contains the following:
1517
1518 - "enabled": true or false (json-bool)
1519 - "host": server's IP address (json-string)
1520 - "family": address family (json-string)
1521          - Possible values: "ipv4", "ipv6", "unix", "unknown"
1522 - "service": server's port number (json-string)
1523 - "auth": authentication method (json-string)
1524          - Possible values: "invalid", "none", "ra2", "ra2ne", "sasl", "tight",
1525                             "tls", "ultra", "unknown", "vencrypt", "vencrypt",
1526                             "vencrypt+plain", "vencrypt+tls+none",
1527                             "vencrypt+tls+plain", "vencrypt+tls+sasl",
1528                             "vencrypt+tls+vnc", "vencrypt+x509+none",
1529                             "vencrypt+x509+plain", "vencrypt+x509+sasl",
1530                             "vencrypt+x509+vnc", "vnc"
1531 - "clients": a json-array of all connected clients
1532
1533 Clients are described by a json-object, each one contain the following:
1534
1535 - "host": client's IP address (json-string)
1536 - "family": address family (json-string)
1537          - Possible values: "ipv4", "ipv6", "unix", "unknown"
1538 - "service": client's port number (json-string)
1539 - "x509_dname": TLS dname (json-string, optional)
1540 - "sasl_username": SASL username (json-string, optional)
1541
1542 Example:
1543
1544 -> { "execute": "query-vnc" }
1545 <- {
1546       "return":{
1547          "enabled":true,
1548          "host":"0.0.0.0",
1549          "service":"50402",
1550          "auth":"vnc",
1551          "family":"ipv4",
1552          "clients":[
1553             {
1554                "host":"127.0.0.1",
1555                "service":"50401",
1556                "family":"ipv4"
1557             }
1558          ]
1559       }
1560    }
1561
1562 EQMP
1563
1564 SQMP
1565 query-spice
1566 -----------
1567
1568 Show SPICE server information.
1569
1570 Return a json-object with server information. Connected clients are returned
1571 as a json-array of json-objects.
1572
1573 The main json-object contains the following:
1574
1575 - "enabled": true or false (json-bool)
1576 - "host": server's IP address (json-string)
1577 - "port": server's port number (json-int, optional)
1578 - "tls-port": server's port number (json-int, optional)
1579 - "auth": authentication method (json-string)
1580          - Possible values: "none", "spice"
1581 - "channels": a json-array of all active channels clients
1582
1583 Channels are described by a json-object, each one contain the following:
1584
1585 - "host": client's IP address (json-string)
1586 - "family": address family (json-string)
1587          - Possible values: "ipv4", "ipv6", "unix", "unknown"
1588 - "port": client's port number (json-string)
1589 - "connection-id": spice connection id.  All channels with the same id
1590                    belong to the same spice session (json-int)
1591 - "channel-type": channel type.  "1" is the main control channel, filter for
1592                   this one if you want track spice sessions only (json-int)
1593 - "channel-id": channel id.  Usually "0", might be different needed when
1594                 multiple channels of the same type exist, such as multiple
1595                 display channels in a multihead setup (json-int)
1596 - "tls": whevener the channel is encrypted (json-bool)
1597
1598 Example:
1599
1600 -> { "execute": "query-spice" }
1601 <- {
1602       "return": {
1603          "enabled": true,
1604          "auth": "spice",
1605          "port": 5920,
1606          "tls-port": 5921,
1607          "host": "0.0.0.0",
1608          "channels": [
1609             {
1610                "port": "54924",
1611                "family": "ipv4",
1612                "channel-type": 1,
1613                "connection-id": 1804289383,
1614                "host": "127.0.0.1",
1615                "channel-id": 0,
1616                "tls": true
1617             },
1618             {
1619                "port": "36710",
1620                "family": "ipv4",
1621                "channel-type": 4,
1622                "connection-id": 1804289383,
1623                "host": "127.0.0.1",
1624                "channel-id": 0,
1625                "tls": false
1626             },
1627             [ ... more channels follow ... ]
1628          ]
1629       }
1630    }
1631
1632 EQMP
1633
1634 SQMP
1635 query-name
1636 ----------
1637
1638 Show VM name.
1639
1640 Return a json-object with the following information:
1641
1642 - "name": VM's name (json-string, optional)
1643
1644 Example:
1645
1646 -> { "execute": "query-name" }
1647 <- { "return": { "name": "qemu-name" } }
1648
1649 EQMP
1650
1651 SQMP
1652 query-uuid
1653 ----------
1654
1655 Show VM UUID.
1656
1657 Return a json-object with the following information:
1658
1659 - "UUID": Universally Unique Identifier (json-string)
1660
1661 Example:
1662
1663 -> { "execute": "query-uuid" }
1664 <- { "return": { "UUID": "550e8400-e29b-41d4-a716-446655440000" } }
1665
1666 EQMP
1667
1668 SQMP
1669 query-migrate
1670 -------------
1671
1672 Migration status.
1673
1674 Return a json-object. If migration is active there will be another json-object
1675 with RAM migration status and if block migration is active another one with
1676 block migration status.
1677
1678 The main json-object contains the following:
1679
1680 - "status": migration status (json-string)
1681      - Possible values: "active", "completed", "failed", "cancelled"
1682 - "ram": only present if "status" is "active", it is a json-object with the
1683   following RAM information (in bytes):
1684          - "transferred": amount transferred (json-int)
1685          - "remaining": amount remaining (json-int)
1686          - "total": total (json-int)
1687 - "disk": only present if "status" is "active" and it is a block migration,
1688   it is a json-object with the following disk information (in bytes):
1689          - "transferred": amount transferred (json-int)
1690          - "remaining": amount remaining (json-int)
1691          - "total": total (json-int)
1692
1693 Examples:
1694
1695 1. Before the first migration
1696
1697 -> { "execute": "query-migrate" }
1698 <- { "return": {} }
1699
1700 2. Migration is done and has succeeded
1701
1702 -> { "execute": "query-migrate" }
1703 <- { "return": { "status": "completed" } }
1704
1705 3. Migration is done and has failed
1706
1707 -> { "execute": "query-migrate" }
1708 <- { "return": { "status": "failed" } }
1709
1710 4. Migration is being performed and is not a block migration:
1711
1712 -> { "execute": "query-migrate" }
1713 <- {
1714       "return":{
1715          "status":"active",
1716          "ram":{
1717             "transferred":123,
1718             "remaining":123,
1719             "total":246
1720          }
1721       }
1722    }
1723
1724 5. Migration is being performed and is a block migration:
1725
1726 -> { "execute": "query-migrate" }
1727 <- {
1728       "return":{
1729          "status":"active",
1730          "ram":{
1731             "total":1057024,
1732             "remaining":1053304,
1733             "transferred":3720
1734          },
1735          "disk":{
1736             "total":20971520,
1737             "remaining":20880384,
1738             "transferred":91136
1739          }
1740       }
1741    }
1742
1743 EQMP
1744
1745 SQMP
1746 query-balloon
1747 -------------
1748
1749 Show balloon information.
1750
1751 Make an asynchronous request for balloon info. When the request completes a
1752 json-object will be returned containing the following data:
1753
1754 - "actual": current balloon value in bytes (json-int)
1755 - "mem_swapped_in": Amount of memory swapped in bytes (json-int, optional)
1756 - "mem_swapped_out": Amount of memory swapped out in bytes (json-int, optional)
1757 - "major_page_faults": Number of major faults (json-int, optional)
1758 - "minor_page_faults": Number of minor faults (json-int, optional)
1759 - "free_mem": Total amount of free and unused memory in
1760               bytes (json-int, optional)
1761 - "total_mem": Total amount of available memory in bytes (json-int, optional)
1762
1763 Example:
1764
1765 -> { "execute": "query-balloon" }
1766 <- {
1767       "return":{
1768          "actual":1073741824,
1769          "mem_swapped_in":0,
1770          "mem_swapped_out":0,
1771          "major_page_faults":142,
1772          "minor_page_faults":239245,
1773          "free_mem":1014185984,
1774          "total_mem":1044668416
1775       }
1776    }
1777
1778 EQMP
1779