1HXCOMM Use DEFHEADING() to define headings in both help text and rST. 2HXCOMM Text between SRST and ERST is copied to the rST version and 3HXCOMM discarded from C version. 4HXCOMM DEF(command, args, callback, arg_string, help) is used to construct 5HXCOMM monitor commands 6HXCOMM HXCOMM can be used for comments, discarded from both rST and C. 7 8 9 { 10 .name = "help|?", 11 .args_type = "name:S?", 12 .params = "[cmd]", 13 .help = "show the help", 14 .cmd = do_help_cmd, 15 .flags = "p", 16 }, 17 18SRST 19``help`` or ``?`` [*cmd*] 20 Show the help for all commands or just for command *cmd*. 21ERST 22 23 { 24 .name = "commit", 25 .args_type = "device:B", 26 .params = "device|all", 27 .help = "commit changes to the disk images (if -snapshot is used) or backing files", 28 .cmd = hmp_commit, 29 }, 30 31SRST 32``commit`` 33 Commit changes to the disk images (if -snapshot is used) or backing files. 34 If the backing file is smaller than the snapshot, then the backing file 35 will be resized to be the same size as the snapshot. If the snapshot is 36 smaller than the backing file, the backing file will not be truncated. 37 If you want the backing file to match the size of the smaller snapshot, 38 you can safely truncate it yourself once the commit operation successfully 39 completes. 40ERST 41 42 { 43 .name = "quit|q", 44 .args_type = "", 45 .params = "", 46 .help = "quit the emulator", 47 .cmd = hmp_quit, 48 .flags = "p", 49 }, 50 51SRST 52``quit`` or ``q`` 53 Quit the emulator. 54ERST 55 56 { 57 .name = "exit_preconfig", 58 .args_type = "", 59 .params = "", 60 .help = "exit the preconfig state", 61 .cmd = hmp_exit_preconfig, 62 .flags = "p", 63 }, 64 65SRST 66``exit_preconfig`` 67 This command makes QEMU exit the preconfig state and proceed with 68 VM initialization using configuration data provided on the command line 69 and via the QMP monitor during the preconfig state. The command is only 70 available during the preconfig state (i.e. when the --preconfig command 71 line option was in use). 72ERST 73 74 { 75 .name = "block_resize", 76 .args_type = "device:B,size:o", 77 .params = "device size", 78 .help = "resize a block image", 79 .cmd = hmp_block_resize, 80 .coroutine = true, 81 .flags = "p", 82 }, 83 84SRST 85``block_resize`` 86 Resize a block image while a guest is running. Usually requires guest 87 action to see the updated size. Resize to a lower size is supported, 88 but should be used with extreme caution. Note that this command only 89 resizes image files, it can not resize block devices like LVM volumes. 90ERST 91 92 { 93 .name = "block_stream", 94 .args_type = "device:B,speed:o?,base:s?", 95 .params = "device [speed [base]]", 96 .help = "copy data from a backing file into a block device", 97 .cmd = hmp_block_stream, 98 .flags = "p", 99 }, 100 101SRST 102``block_stream`` 103 Copy data from a backing file into a block device. 104ERST 105 106 { 107 .name = "block_job_set_speed", 108 .args_type = "device:B,speed:o", 109 .params = "device speed", 110 .help = "set maximum speed for a background block operation", 111 .cmd = hmp_block_job_set_speed, 112 .flags = "p", 113 }, 114 115SRST 116``block_job_set_speed`` 117 Set maximum speed for a background block operation. 118ERST 119 120 { 121 .name = "block_job_cancel", 122 .args_type = "force:-f,device:B", 123 .params = "[-f] device", 124 .help = "stop an active background block operation (use -f" 125 "\n\t\t\t if you want to abort the operation immediately" 126 "\n\t\t\t instead of keep running until data is in sync)", 127 .cmd = hmp_block_job_cancel, 128 .flags = "p", 129 }, 130 131SRST 132``block_job_cancel`` 133 Stop an active background block operation (streaming, mirroring). 134ERST 135 136 { 137 .name = "block_job_complete", 138 .args_type = "device:B", 139 .params = "device", 140 .help = "stop an active background block operation", 141 .cmd = hmp_block_job_complete, 142 .flags = "p", 143 }, 144 145SRST 146``block_job_complete`` 147 Manually trigger completion of an active background block operation. 148 For mirroring, this will switch the device to the destination path. 149ERST 150 151 { 152 .name = "block_job_pause", 153 .args_type = "device:B", 154 .params = "device", 155 .help = "pause an active background block operation", 156 .cmd = hmp_block_job_pause, 157 .flags = "p", 158 }, 159 160SRST 161``block_job_pause`` 162 Pause an active block streaming operation. 163ERST 164 165 { 166 .name = "block_job_resume", 167 .args_type = "device:B", 168 .params = "device", 169 .help = "resume a paused background block operation", 170 .cmd = hmp_block_job_resume, 171 .flags = "p", 172 }, 173 174SRST 175``block_job_resume`` 176 Resume a paused block streaming operation. 177ERST 178 179 { 180 .name = "eject", 181 .args_type = "force:-f,device:B", 182 .params = "[-f] device", 183 .help = "eject a removable medium (use -f to force it)", 184 .cmd = hmp_eject, 185 }, 186 187SRST 188``eject [-f]`` *device* 189 Eject a removable medium (use -f to force it). 190ERST 191 192 { 193 .name = "drive_del", 194 .args_type = "id:B", 195 .params = "device", 196 .help = "remove host block device", 197 .cmd = hmp_drive_del, 198 }, 199 200SRST 201``drive_del`` *device* 202 Remove host block device. The result is that guest generated IO is no longer 203 submitted against the host device underlying the disk. Once a drive has 204 been deleted, the QEMU Block layer returns -EIO which results in IO 205 errors in the guest for applications that are reading/writing to the device. 206 These errors are always reported to the guest, regardless of the drive's error 207 actions (drive options rerror, werror). 208ERST 209 210 { 211 .name = "change", 212 .args_type = "device:B,force:-f,target:F,arg:s?,read-only-mode:s?", 213 .params = "device [-f] filename [format [read-only-mode]]", 214 .help = "change a removable medium, optional format, use -f to force the operation", 215 .cmd = hmp_change, 216 }, 217 218SRST 219``change`` *device* *setting* 220 Change the configuration of a device. 221 222 ``change`` *diskdevice* [-f] *filename* [*format* [*read-only-mode*]] 223 Change the medium for a removable disk device to point to *filename*. eg:: 224 225 (qemu) change ide1-cd0 /path/to/some.iso 226 227 ``-f`` 228 forces the operation even if the guest has locked the tray. 229 230 *format* is optional. 231 232 *read-only-mode* may be used to change the read-only status of the device. 233 It accepts the following values: 234 235 retain 236 Retains the current status; this is the default. 237 238 read-only 239 Makes the device read-only. 240 241 read-write 242 Makes the device writable. 243 244 ``change vnc password`` [*password*] 245 246 Change the password associated with the VNC server. If the new password 247 is not supplied, the monitor will prompt for it to be entered. VNC 248 passwords are only significant up to 8 letters. eg:: 249 250 (qemu) change vnc password 251 Password: ******** 252 253ERST 254 255 { 256 .name = "screendump", 257 .args_type = "filename:F,format:-fs,device:s?,head:i?", 258 .params = "filename [-f format] [device [head]]", 259 .help = "save screen from head 'head' of display device 'device'" 260 "in specified format 'format' as image 'filename'." 261 "Currently only 'png' and 'ppm' formats are supported.", 262 .cmd = hmp_screendump, 263 .coroutine = true, 264 }, 265 266SRST 267``screendump`` *filename* 268 Save screen into PPM image *filename*. 269ERST 270 271 { 272 .name = "logfile", 273 .args_type = "filename:F", 274 .params = "filename", 275 .help = "output logs to 'filename'", 276 .cmd = hmp_logfile, 277 }, 278 279SRST 280``logfile`` *filename* 281 Output logs to *filename*. 282ERST 283 284 { 285 .name = "trace-event", 286 .args_type = "name:s,option:b,vcpu:i?", 287 .params = "name on|off [vcpu]", 288 .help = "changes status of a specific trace event " 289 "(vcpu: vCPU to set, default is all)", 290 .cmd = hmp_trace_event, 291 .command_completion = trace_event_completion, 292 }, 293 294SRST 295``trace-event`` 296 changes status of a trace event 297ERST 298 299#if defined(CONFIG_TRACE_SIMPLE) 300 { 301 .name = "trace-file", 302 .args_type = "op:s?,arg:F?", 303 .params = "on|off|flush|set [arg]", 304 .help = "open, close, or flush trace file, or set a new file name", 305 .cmd = hmp_trace_file, 306 }, 307 308SRST 309``trace-file on|off|flush`` 310 Open, close, or flush the trace file. If no argument is given, the 311 status of the trace file is displayed. 312ERST 313#endif 314 315 { 316 .name = "log", 317 .args_type = "items:s", 318 .params = "item1[,...]", 319 .help = "activate logging of the specified items", 320 .cmd = hmp_log, 321 }, 322 323SRST 324``log`` *item1*\ [,...] 325 Activate logging of the specified items. 326ERST 327 328 { 329 .name = "savevm", 330 .args_type = "name:s?", 331 .params = "tag", 332 .help = "save a VM snapshot. If no tag is provided, a new snapshot is created", 333 .cmd = hmp_savevm, 334 }, 335 336SRST 337``savevm`` *tag* 338 Create a snapshot of the whole virtual machine. If *tag* is 339 provided, it is used as human readable identifier. If there is already 340 a snapshot with the same tag, it is replaced. More info at 341 :ref:`vm_005fsnapshots`. 342 343 Since 4.0, savevm stopped allowing the snapshot id to be set, accepting 344 only *tag* as parameter. 345ERST 346 347 { 348 .name = "loadvm", 349 .args_type = "name:s", 350 .params = "tag", 351 .help = "restore a VM snapshot from its tag", 352 .cmd = hmp_loadvm, 353 .command_completion = loadvm_completion, 354 }, 355 356SRST 357``loadvm`` *tag* 358 Set the whole virtual machine to the snapshot identified by the tag 359 *tag*. 360 361 Since 4.0, loadvm stopped accepting snapshot id as parameter. 362ERST 363 364 { 365 .name = "delvm", 366 .args_type = "name:s", 367 .params = "tag", 368 .help = "delete a VM snapshot from its tag", 369 .cmd = hmp_delvm, 370 .command_completion = delvm_completion, 371 }, 372 373SRST 374``delvm`` *tag* 375 Delete the snapshot identified by *tag*. 376 377 Since 4.0, delvm stopped deleting snapshots by snapshot id, accepting 378 only *tag* as parameter. 379ERST 380 381 { 382 .name = "singlestep", 383 .args_type = "option:s?", 384 .params = "[on|off]", 385 .help = "run emulation in singlestep mode or switch to normal mode", 386 .cmd = hmp_singlestep, 387 }, 388 389SRST 390``singlestep [off]`` 391 Run the emulation in single step mode. 392 If called with option off, the emulation returns to normal mode. 393ERST 394 395 { 396 .name = "stop|s", 397 .args_type = "", 398 .params = "", 399 .help = "stop emulation", 400 .cmd = hmp_stop, 401 }, 402 403SRST 404``stop`` or ``s`` 405 Stop emulation. 406ERST 407 408 { 409 .name = "cont|c", 410 .args_type = "", 411 .params = "", 412 .help = "resume emulation", 413 .cmd = hmp_cont, 414 }, 415 416SRST 417``cont`` or ``c`` 418 Resume emulation. 419ERST 420 421 { 422 .name = "system_wakeup", 423 .args_type = "", 424 .params = "", 425 .help = "wakeup guest from suspend", 426 .cmd = hmp_system_wakeup, 427 }, 428 429SRST 430``system_wakeup`` 431 Wakeup guest from suspend. 432ERST 433 434 { 435 .name = "gdbserver", 436 .args_type = "device:s?", 437 .params = "[device]", 438 .help = "start gdbserver on given device (default 'tcp::1234'), stop with 'none'", 439 .cmd = hmp_gdbserver, 440 }, 441 442SRST 443``gdbserver`` [*port*] 444 Start gdbserver session (default *port*\=1234) 445ERST 446 447 { 448 .name = "x", 449 .args_type = "fmt:/,addr:l", 450 .params = "/fmt addr", 451 .help = "virtual memory dump starting at 'addr'", 452 .cmd = hmp_memory_dump, 453 }, 454 455SRST 456``x/``\ *fmt* *addr* 457 Virtual memory dump starting at *addr*. 458ERST 459 460 { 461 .name = "xp", 462 .args_type = "fmt:/,addr:l", 463 .params = "/fmt addr", 464 .help = "physical memory dump starting at 'addr'", 465 .cmd = hmp_physical_memory_dump, 466 }, 467 468SRST 469``xp /``\ *fmt* *addr* 470 Physical memory dump starting at *addr*. 471 472 *fmt* is a format which tells the command how to format the 473 data. Its syntax is: ``/{count}{format}{size}`` 474 475 *count* 476 is the number of items to be dumped. 477 *format* 478 can be x (hex), d (signed decimal), u (unsigned decimal), o (octal), 479 c (char) or i (asm instruction). 480 *size* 481 can be b (8 bits), h (16 bits), w (32 bits) or g (64 bits). On x86, 482 ``h`` or ``w`` can be specified with the ``i`` format to 483 respectively select 16 or 32 bit code instruction size. 484 485 Examples: 486 487 Dump 10 instructions at the current instruction pointer:: 488 489 (qemu) x/10i $eip 490 0x90107063: ret 491 0x90107064: sti 492 0x90107065: lea 0x0(%esi,1),%esi 493 0x90107069: lea 0x0(%edi,1),%edi 494 0x90107070: ret 495 0x90107071: jmp 0x90107080 496 0x90107073: nop 497 0x90107074: nop 498 0x90107075: nop 499 0x90107076: nop 500 501 Dump 80 16 bit values at the start of the video memory:: 502 503 (qemu) xp/80hx 0xb8000 504 0x000b8000: 0x0b50 0x0b6c 0x0b65 0x0b78 0x0b38 0x0b36 0x0b2f 0x0b42 505 0x000b8010: 0x0b6f 0x0b63 0x0b68 0x0b73 0x0b20 0x0b56 0x0b47 0x0b41 506 0x000b8020: 0x0b42 0x0b69 0x0b6f 0x0b73 0x0b20 0x0b63 0x0b75 0x0b72 507 0x000b8030: 0x0b72 0x0b65 0x0b6e 0x0b74 0x0b2d 0x0b63 0x0b76 0x0b73 508 0x000b8040: 0x0b20 0x0b30 0x0b35 0x0b20 0x0b4e 0x0b6f 0x0b76 0x0b20 509 0x000b8050: 0x0b32 0x0b30 0x0b30 0x0b33 0x0720 0x0720 0x0720 0x0720 510 0x000b8060: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 511 0x000b8070: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 512 0x000b8080: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 513 0x000b8090: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 514 515ERST 516 517 { 518 .name = "gpa2hva", 519 .args_type = "addr:l", 520 .params = "addr", 521 .help = "print the host virtual address corresponding to a guest physical address", 522 .cmd = hmp_gpa2hva, 523 }, 524 525SRST 526``gpa2hva`` *addr* 527 Print the host virtual address at which the guest's physical address *addr* 528 is mapped. 529ERST 530 531#ifdef CONFIG_LINUX 532 { 533 .name = "gpa2hpa", 534 .args_type = "addr:l", 535 .params = "addr", 536 .help = "print the host physical address corresponding to a guest physical address", 537 .cmd = hmp_gpa2hpa, 538 }, 539#endif 540 541SRST 542``gpa2hpa`` *addr* 543 Print the host physical address at which the guest's physical address *addr* 544 is mapped. 545ERST 546 547 { 548 .name = "gva2gpa", 549 .args_type = "addr:l", 550 .params = "addr", 551 .help = "print the guest physical address corresponding to a guest virtual address", 552 .cmd = hmp_gva2gpa, 553 }, 554 555SRST 556``gva2gpa`` *addr* 557 Print the guest physical address at which the guest's virtual address *addr* 558 is mapped based on the mapping for the current CPU. 559ERST 560 561 { 562 .name = "print|p", 563 .args_type = "fmt:/,val:l", 564 .params = "/fmt expr", 565 .help = "print expression value (use $reg for CPU register access)", 566 .cmd = do_print, 567 }, 568 569SRST 570``print`` or ``p/``\ *fmt* *expr* 571 Print expression value. Only the *format* part of *fmt* is 572 used. 573ERST 574 575 { 576 .name = "i", 577 .args_type = "fmt:/,addr:i,index:i.", 578 .params = "/fmt addr", 579 .help = "I/O port read", 580 .cmd = hmp_ioport_read, 581 }, 582 583SRST 584``i/``\ *fmt* *addr* [.\ *index*\ ] 585 Read I/O port. 586ERST 587 588 { 589 .name = "o", 590 .args_type = "fmt:/,addr:i,val:i", 591 .params = "/fmt addr value", 592 .help = "I/O port write", 593 .cmd = hmp_ioport_write, 594 }, 595 596SRST 597``o/``\ *fmt* *addr* *val* 598 Write to I/O port. 599ERST 600 601 { 602 .name = "sendkey", 603 .args_type = "keys:s,hold-time:i?", 604 .params = "keys [hold_ms]", 605 .help = "send keys to the VM (e.g. 'sendkey ctrl-alt-f1', default hold time=100 ms)", 606 .cmd = hmp_sendkey, 607 .command_completion = sendkey_completion, 608 }, 609 610SRST 611``sendkey`` *keys* 612 Send *keys* to the guest. *keys* could be the name of the 613 key or the raw value in hexadecimal format. Use ``-`` to press 614 several keys simultaneously. Example:: 615 616 sendkey ctrl-alt-f1 617 618 This command is useful to send keys that your graphical user interface 619 intercepts at low level, such as ``ctrl-alt-f1`` in X Window. 620ERST 621 { 622 .name = "sync-profile", 623 .args_type = "op:s?", 624 .params = "[on|off|reset]", 625 .help = "enable, disable or reset synchronization profiling. " 626 "With no arguments, prints whether profiling is on or off.", 627 .cmd = hmp_sync_profile, 628 }, 629 630SRST 631``sync-profile [on|off|reset]`` 632 Enable, disable or reset synchronization profiling. With no arguments, prints 633 whether profiling is on or off. 634ERST 635 636 { 637 .name = "system_reset", 638 .args_type = "", 639 .params = "", 640 .help = "reset the system", 641 .cmd = hmp_system_reset, 642 }, 643 644SRST 645``system_reset`` 646 Reset the system. 647ERST 648 649 { 650 .name = "system_powerdown", 651 .args_type = "", 652 .params = "", 653 .help = "send system power down event", 654 .cmd = hmp_system_powerdown, 655 }, 656 657SRST 658``system_powerdown`` 659 Power down the system (if supported). 660ERST 661 662 { 663 .name = "sum", 664 .args_type = "start:i,size:i", 665 .params = "addr size", 666 .help = "compute the checksum of a memory region", 667 .cmd = hmp_sum, 668 }, 669 670SRST 671``sum`` *addr* *size* 672 Compute the checksum of a memory region. 673ERST 674 675 { 676 .name = "device_add", 677 .args_type = "device:O", 678 .params = "driver[,prop=value][,...]", 679 .help = "add device, like -device on the command line", 680 .cmd = hmp_device_add, 681 .command_completion = device_add_completion, 682 }, 683 684SRST 685``device_add`` *config* 686 Add device. 687ERST 688 689 { 690 .name = "device_del", 691 .args_type = "id:s", 692 .params = "device", 693 .help = "remove device", 694 .cmd = hmp_device_del, 695 .command_completion = device_del_completion, 696 }, 697 698SRST 699``device_del`` *id* 700 Remove device *id*. *id* may be a short ID 701 or a QOM object path. 702ERST 703 704 { 705 .name = "cpu", 706 .args_type = "index:i", 707 .params = "index", 708 .help = "set the default CPU", 709 .cmd = hmp_cpu, 710 }, 711 712SRST 713``cpu`` *index* 714 Set the default CPU. 715ERST 716 717 { 718 .name = "mouse_move", 719 .args_type = "dx_str:s,dy_str:s,dz_str:s?", 720 .params = "dx dy [dz]", 721 .help = "send mouse move events", 722 .cmd = hmp_mouse_move, 723 }, 724 725SRST 726``mouse_move`` *dx* *dy* [*dz*] 727 Move the active mouse to the specified coordinates *dx* *dy* 728 with optional scroll axis *dz*. 729ERST 730 731 { 732 .name = "mouse_button", 733 .args_type = "button_state:i", 734 .params = "state", 735 .help = "change mouse button state (1=L, 2=M, 4=R)", 736 .cmd = hmp_mouse_button, 737 }, 738 739SRST 740``mouse_button`` *val* 741 Change the active mouse button state *val* (1=L, 2=M, 4=R). 742ERST 743 744 { 745 .name = "mouse_set", 746 .args_type = "index:i", 747 .params = "index", 748 .help = "set which mouse device receives events", 749 .cmd = hmp_mouse_set, 750 }, 751 752SRST 753``mouse_set`` *index* 754 Set which mouse device receives events at given *index*, index 755 can be obtained with:: 756 757 info mice 758 759ERST 760 761 { 762 .name = "wavcapture", 763 .args_type = "path:F,audiodev:s,freq:i?,bits:i?,nchannels:i?", 764 .params = "path audiodev [frequency [bits [channels]]]", 765 .help = "capture audio to a wave file (default frequency=44100 bits=16 channels=2)", 766 .cmd = hmp_wavcapture, 767 }, 768SRST 769``wavcapture`` *filename* *audiodev* [*frequency* [*bits* [*channels*]]] 770 Capture audio into *filename* from *audiodev*, using sample rate 771 *frequency* bits per sample *bits* and number of channels 772 *channels*. 773 774 Defaults: 775 776 - Sample rate = 44100 Hz - CD quality 777 - Bits = 16 778 - Number of channels = 2 - Stereo 779ERST 780 781 { 782 .name = "stopcapture", 783 .args_type = "n:i", 784 .params = "capture index", 785 .help = "stop capture", 786 .cmd = hmp_stopcapture, 787 }, 788SRST 789``stopcapture`` *index* 790 Stop capture with a given *index*, index can be obtained with:: 791 792 info capture 793 794ERST 795 796 { 797 .name = "memsave", 798 .args_type = "val:l,size:i,filename:s", 799 .params = "addr size file", 800 .help = "save to disk virtual memory dump starting at 'addr' of size 'size'", 801 .cmd = hmp_memsave, 802 }, 803 804SRST 805``memsave`` *addr* *size* *file* 806 save to disk virtual memory dump starting at *addr* of size *size*. 807ERST 808 809 { 810 .name = "pmemsave", 811 .args_type = "val:l,size:i,filename:s", 812 .params = "addr size file", 813 .help = "save to disk physical memory dump starting at 'addr' of size 'size'", 814 .cmd = hmp_pmemsave, 815 }, 816 817SRST 818``pmemsave`` *addr* *size* *file* 819 save to disk physical memory dump starting at *addr* of size *size*. 820ERST 821 822 { 823 .name = "boot_set", 824 .args_type = "bootdevice:s", 825 .params = "bootdevice", 826 .help = "define new values for the boot device list", 827 .cmd = hmp_boot_set, 828 }, 829 830SRST 831``boot_set`` *bootdevicelist* 832 Define new values for the boot device list. Those values will override 833 the values specified on the command line through the ``-boot`` option. 834 835 The values that can be specified here depend on the machine type, but are 836 the same that can be specified in the ``-boot`` command line option. 837ERST 838 839 { 840 .name = "nmi", 841 .args_type = "", 842 .params = "", 843 .help = "inject an NMI", 844 .cmd = hmp_nmi, 845 }, 846SRST 847``nmi`` *cpu* 848 Inject an NMI on the default CPU (x86/s390) or all CPUs (ppc64). 849ERST 850 851 { 852 .name = "ringbuf_write", 853 .args_type = "device:s,data:s", 854 .params = "device data", 855 .help = "Write to a ring buffer character device", 856 .cmd = hmp_ringbuf_write, 857 .command_completion = ringbuf_write_completion, 858 }, 859 860SRST 861``ringbuf_write`` *device* *data* 862 Write *data* to ring buffer character device *device*. 863 *data* must be a UTF-8 string. 864ERST 865 866 { 867 .name = "ringbuf_read", 868 .args_type = "device:s,size:i", 869 .params = "device size", 870 .help = "Read from a ring buffer character device", 871 .cmd = hmp_ringbuf_read, 872 .command_completion = ringbuf_write_completion, 873 }, 874 875SRST 876``ringbuf_read`` *device* 877 Read and print up to *size* bytes from ring buffer character 878 device *device*. 879 Certain non-printable characters are printed ``\uXXXX``, where ``XXXX`` is the 880 character code in hexadecimal. Character ``\`` is printed ``\\``. 881 Bug: can screw up when the buffer contains invalid UTF-8 sequences, 882 NUL characters, after the ring buffer lost data, and when reading 883 stops because the size limit is reached. 884ERST 885 886 { 887 .name = "announce_self", 888 .args_type = "interfaces:s?,id:s?", 889 .params = "[interfaces] [id]", 890 .help = "Trigger GARP/RARP announcements", 891 .cmd = hmp_announce_self, 892 }, 893 894SRST 895``announce_self`` 896 Trigger a round of GARP/RARP broadcasts; this is useful for explicitly 897 updating the network infrastructure after a reconfiguration or some forms 898 of migration. The timings of the round are set by the migration announce 899 parameters. An optional comma separated *interfaces* list restricts the 900 announce to the named set of interfaces. An optional *id* can be used to 901 start a separate announce timer and to change the parameters of it later. 902ERST 903 904 { 905 .name = "migrate", 906 .args_type = "detach:-d,blk:-b,inc:-i,resume:-r,uri:s", 907 .params = "[-d] [-b] [-i] [-r] uri", 908 .help = "migrate to URI (using -d to not wait for completion)" 909 "\n\t\t\t -b for migration without shared storage with" 910 " full copy of disk\n\t\t\t -i for migration without " 911 "shared storage with incremental copy of disk " 912 "(base image shared between src and destination)" 913 "\n\t\t\t -r to resume a paused migration", 914 .cmd = hmp_migrate, 915 }, 916 917 918SRST 919``migrate [-d] [-b] [-i]`` *uri* 920 Migrate to *uri* (using -d to not wait for completion). 921 922 ``-b`` 923 for migration with full copy of disk 924 ``-i`` 925 for migration with incremental copy of disk (base image is shared) 926ERST 927 928 { 929 .name = "migrate_cancel", 930 .args_type = "", 931 .params = "", 932 .help = "cancel the current VM migration", 933 .cmd = hmp_migrate_cancel, 934 }, 935 936SRST 937``migrate_cancel`` 938 Cancel the current VM migration. 939ERST 940 941 { 942 .name = "migrate_continue", 943 .args_type = "state:s", 944 .params = "state", 945 .help = "Continue migration from the given paused state", 946 .cmd = hmp_migrate_continue, 947 }, 948SRST 949``migrate_continue`` *state* 950 Continue migration from the paused state *state* 951ERST 952 953 { 954 .name = "migrate_incoming", 955 .args_type = "uri:s", 956 .params = "uri", 957 .help = "Continue an incoming migration from an -incoming defer", 958 .cmd = hmp_migrate_incoming, 959 }, 960 961SRST 962``migrate_incoming`` *uri* 963 Continue an incoming migration using the *uri* (that has the same syntax 964 as the ``-incoming`` option). 965ERST 966 967 { 968 .name = "migrate_recover", 969 .args_type = "uri:s", 970 .params = "uri", 971 .help = "Continue a paused incoming postcopy migration", 972 .cmd = hmp_migrate_recover, 973 }, 974 975SRST 976``migrate_recover`` *uri* 977 Continue a paused incoming postcopy migration using the *uri*. 978ERST 979 980 { 981 .name = "migrate_pause", 982 .args_type = "", 983 .params = "", 984 .help = "Pause an ongoing migration (postcopy-only)", 985 .cmd = hmp_migrate_pause, 986 }, 987 988SRST 989``migrate_pause`` 990 Pause an ongoing migration. Currently it only supports postcopy. 991ERST 992 993 { 994 .name = "migrate_set_capability", 995 .args_type = "capability:s,state:b", 996 .params = "capability state", 997 .help = "Enable/Disable the usage of a capability for migration", 998 .cmd = hmp_migrate_set_capability, 999 .command_completion = migrate_set_capability_completion, 1000 }, 1001 1002SRST 1003``migrate_set_capability`` *capability* *state* 1004 Enable/Disable the usage of a capability *capability* for migration. 1005ERST 1006 1007 { 1008 .name = "migrate_set_parameter", 1009 .args_type = "parameter:s,value:s", 1010 .params = "parameter value", 1011 .help = "Set the parameter for migration", 1012 .cmd = hmp_migrate_set_parameter, 1013 .command_completion = migrate_set_parameter_completion, 1014 }, 1015 1016SRST 1017``migrate_set_parameter`` *parameter* *value* 1018 Set the parameter *parameter* for migration. 1019ERST 1020 1021 { 1022 .name = "migrate_start_postcopy", 1023 .args_type = "", 1024 .params = "", 1025 .help = "Followup to a migration command to switch the migration" 1026 " to postcopy mode. The postcopy-ram capability must " 1027 "be set on both source and destination before the " 1028 "original migration command .", 1029 .cmd = hmp_migrate_start_postcopy, 1030 }, 1031 1032SRST 1033``migrate_start_postcopy`` 1034 Switch in-progress migration to postcopy mode. Ignored after the end of 1035 migration (or once already in postcopy). 1036ERST 1037 1038 { 1039 .name = "x_colo_lost_heartbeat", 1040 .args_type = "", 1041 .params = "", 1042 .help = "Tell COLO that heartbeat is lost,\n\t\t\t" 1043 "a failover or takeover is needed.", 1044 .cmd = hmp_x_colo_lost_heartbeat, 1045 }, 1046 1047SRST 1048``x_colo_lost_heartbeat`` 1049 Tell COLO that heartbeat is lost, a failover or takeover is needed. 1050ERST 1051 1052 { 1053 .name = "client_migrate_info", 1054 .args_type = "protocol:s,hostname:s,port:i?,tls-port:i?,cert-subject:s?", 1055 .params = "protocol hostname port tls-port cert-subject", 1056 .help = "set migration information for remote display", 1057 .cmd = hmp_client_migrate_info, 1058 }, 1059 1060SRST 1061``client_migrate_info`` *protocol* *hostname* *port* *tls-port* *cert-subject* 1062 Set migration information for remote display. This makes the server 1063 ask the client to automatically reconnect using the new parameters 1064 once migration finished successfully. Only implemented for SPICE. 1065ERST 1066 1067 { 1068 .name = "dump-guest-memory", 1069 .args_type = "paging:-p,detach:-d,windmp:-w,zlib:-z,lzo:-l,snappy:-s,filename:F,begin:l?,length:l?", 1070 .params = "[-p] [-d] [-z|-l|-s|-w] filename [begin length]", 1071 .help = "dump guest memory into file 'filename'.\n\t\t\t" 1072 "-p: do paging to get guest's memory mapping.\n\t\t\t" 1073 "-d: return immediately (do not wait for completion).\n\t\t\t" 1074 "-z: dump in kdump-compressed format, with zlib compression.\n\t\t\t" 1075 "-l: dump in kdump-compressed format, with lzo compression.\n\t\t\t" 1076 "-s: dump in kdump-compressed format, with snappy compression.\n\t\t\t" 1077 "-w: dump in Windows crashdump format (can be used instead of ELF-dump converting),\n\t\t\t" 1078 " for Windows x86 and x64 guests with vmcoreinfo driver only.\n\t\t\t" 1079 "begin: the starting physical address.\n\t\t\t" 1080 "length: the memory size, in bytes.", 1081 .cmd = hmp_dump_guest_memory, 1082 }, 1083 1084SRST 1085``dump-guest-memory [-p]`` *filename* *begin* *length* 1086 \ 1087``dump-guest-memory [-z|-l|-s|-w]`` *filename* 1088 Dump guest memory to *protocol*. The file can be processed with crash or 1089 gdb. Without ``-z|-l|-s|-w``, the dump format is ELF. 1090 1091 ``-p`` 1092 do paging to get guest's memory mapping. 1093 ``-z`` 1094 dump in kdump-compressed format, with zlib compression. 1095 ``-l`` 1096 dump in kdump-compressed format, with lzo compression. 1097 ``-s`` 1098 dump in kdump-compressed format, with snappy compression. 1099 ``-w`` 1100 dump in Windows crashdump format (can be used instead of ELF-dump converting), 1101 for Windows x64 guests with vmcoreinfo driver only 1102 *filename* 1103 dump file name. 1104 *begin* 1105 the starting physical address. It's optional, and should be 1106 specified together with *length*. 1107 *length* 1108 the memory size, in bytes. It's optional, and should be specified 1109 together with *begin*. 1110 1111ERST 1112 1113#if defined(TARGET_S390X) 1114 { 1115 .name = "dump-skeys", 1116 .args_type = "filename:F", 1117 .params = "", 1118 .help = "Save guest storage keys into file 'filename'.\n", 1119 .cmd = hmp_dump_skeys, 1120 }, 1121#endif 1122 1123SRST 1124``dump-skeys`` *filename* 1125 Save guest storage keys to a file. 1126ERST 1127 1128#if defined(TARGET_S390X) 1129 { 1130 .name = "migration_mode", 1131 .args_type = "mode:i", 1132 .params = "mode", 1133 .help = "Enables or disables migration mode\n", 1134 .cmd = hmp_migrationmode, 1135 }, 1136#endif 1137 1138SRST 1139``migration_mode`` *mode* 1140 Enables or disables migration mode. 1141ERST 1142 1143 { 1144 .name = "snapshot_blkdev", 1145 .args_type = "reuse:-n,device:B,snapshot-file:s?,format:s?", 1146 .params = "[-n] device [new-image-file] [format]", 1147 .help = "initiates a live snapshot\n\t\t\t" 1148 "of device. If a new image file is specified, the\n\t\t\t" 1149 "new image file will become the new root image.\n\t\t\t" 1150 "If format is specified, the snapshot file will\n\t\t\t" 1151 "be created in that format.\n\t\t\t" 1152 "The default format is qcow2. The -n flag requests QEMU\n\t\t\t" 1153 "to reuse the image found in new-image-file, instead of\n\t\t\t" 1154 "recreating it from scratch.", 1155 .cmd = hmp_snapshot_blkdev, 1156 }, 1157 1158SRST 1159``snapshot_blkdev`` 1160 Snapshot device, using snapshot file as target if provided 1161ERST 1162 1163 { 1164 .name = "snapshot_blkdev_internal", 1165 .args_type = "device:B,name:s", 1166 .params = "device name", 1167 .help = "take an internal snapshot of device.\n\t\t\t" 1168 "The format of the image used by device must\n\t\t\t" 1169 "support it, such as qcow2.\n\t\t\t", 1170 .cmd = hmp_snapshot_blkdev_internal, 1171 }, 1172 1173SRST 1174``snapshot_blkdev_internal`` 1175 Take an internal snapshot on device if it support 1176ERST 1177 1178 { 1179 .name = "snapshot_delete_blkdev_internal", 1180 .args_type = "device:B,name:s,id:s?", 1181 .params = "device name [id]", 1182 .help = "delete an internal snapshot of device.\n\t\t\t" 1183 "If id is specified, qemu will try delete\n\t\t\t" 1184 "the snapshot matching both id and name.\n\t\t\t" 1185 "The format of the image used by device must\n\t\t\t" 1186 "support it, such as qcow2.\n\t\t\t", 1187 .cmd = hmp_snapshot_delete_blkdev_internal, 1188 }, 1189 1190SRST 1191``snapshot_delete_blkdev_internal`` 1192 Delete an internal snapshot on device if it support 1193ERST 1194 1195 { 1196 .name = "drive_mirror", 1197 .args_type = "reuse:-n,full:-f,device:B,target:s,format:s?", 1198 .params = "[-n] [-f] device target [format]", 1199 .help = "initiates live storage\n\t\t\t" 1200 "migration for a device. The device's contents are\n\t\t\t" 1201 "copied to the new image file, including data that\n\t\t\t" 1202 "is written after the command is started.\n\t\t\t" 1203 "The -n flag requests QEMU to reuse the image found\n\t\t\t" 1204 "in new-image-file, instead of recreating it from scratch.\n\t\t\t" 1205 "The -f flag requests QEMU to copy the whole disk,\n\t\t\t" 1206 "so that the result does not need a backing file.\n\t\t\t", 1207 .cmd = hmp_drive_mirror, 1208 }, 1209SRST 1210``drive_mirror`` 1211 Start mirroring a block device's writes to a new destination, 1212 using the specified target. 1213ERST 1214 1215 { 1216 .name = "drive_backup", 1217 .args_type = "reuse:-n,full:-f,compress:-c,device:B,target:s,format:s?", 1218 .params = "[-n] [-f] [-c] device target [format]", 1219 .help = "initiates a point-in-time\n\t\t\t" 1220 "copy for a device. The device's contents are\n\t\t\t" 1221 "copied to the new image file, excluding data that\n\t\t\t" 1222 "is written after the command is started.\n\t\t\t" 1223 "The -n flag requests QEMU to reuse the image found\n\t\t\t" 1224 "in new-image-file, instead of recreating it from scratch.\n\t\t\t" 1225 "The -f flag requests QEMU to copy the whole disk,\n\t\t\t" 1226 "so that the result does not need a backing file.\n\t\t\t" 1227 "The -c flag requests QEMU to compress backup data\n\t\t\t" 1228 "(if the target format supports it).\n\t\t\t", 1229 .cmd = hmp_drive_backup, 1230 }, 1231SRST 1232``drive_backup`` 1233 Start a point-in-time copy of a block device to a specified target. 1234ERST 1235 1236 { 1237 .name = "drive_add", 1238 .args_type = "node:-n,pci_addr:s,opts:s", 1239 .params = "[-n] [[<domain>:]<bus>:]<slot>\n" 1240 "[file=file][,if=type][,bus=n]\n" 1241 "[,unit=m][,media=d][,index=i]\n" 1242 "[,snapshot=on|off][,cache=on|off]\n" 1243 "[,readonly=on|off][,copy-on-read=on|off]", 1244 .help = "add drive to PCI storage controller", 1245 .cmd = hmp_drive_add, 1246 }, 1247 1248SRST 1249``drive_add`` 1250 Add drive to PCI storage controller. 1251ERST 1252 1253 { 1254 .name = "pcie_aer_inject_error", 1255 .args_type = "advisory_non_fatal:-a,correctable:-c," 1256 "id:s,error_status:s," 1257 "header0:i?,header1:i?,header2:i?,header3:i?," 1258 "prefix0:i?,prefix1:i?,prefix2:i?,prefix3:i?", 1259 .params = "[-a] [-c] id " 1260 "<error_status> [<tlp header> [<tlp header prefix>]]", 1261 .help = "inject pcie aer error\n\t\t\t" 1262 " -a for advisory non fatal error\n\t\t\t" 1263 " -c for correctable error\n\t\t\t" 1264 "<id> = qdev device id\n\t\t\t" 1265 "<error_status> = error string or 32bit\n\t\t\t" 1266 "<tlp header> = 32bit x 4\n\t\t\t" 1267 "<tlp header prefix> = 32bit x 4", 1268 .cmd = hmp_pcie_aer_inject_error, 1269 }, 1270 1271SRST 1272``pcie_aer_inject_error`` 1273 Inject PCIe AER error 1274ERST 1275 1276 { 1277 .name = "netdev_add", 1278 .args_type = "netdev:O", 1279 .params = "[user|tap|socket|vde|bridge|hubport|netmap|vhost-user" 1280#ifdef CONFIG_VMNET 1281 "|vmnet-host|vmnet-shared|vmnet-bridged" 1282#endif 1283 "],id=str[,prop=value][,...]", 1284 .help = "add host network device", 1285 .cmd = hmp_netdev_add, 1286 .command_completion = netdev_add_completion, 1287 .flags = "p", 1288 }, 1289 1290SRST 1291``netdev_add`` 1292 Add host network device. 1293ERST 1294 1295 { 1296 .name = "netdev_del", 1297 .args_type = "id:s", 1298 .params = "id", 1299 .help = "remove host network device", 1300 .cmd = hmp_netdev_del, 1301 .command_completion = netdev_del_completion, 1302 .flags = "p", 1303 }, 1304 1305SRST 1306``netdev_del`` 1307 Remove host network device. 1308ERST 1309 1310 { 1311 .name = "object_add", 1312 .args_type = "object:S", 1313 .params = "[qom-type=]type,id=str[,prop=value][,...]", 1314 .help = "create QOM object", 1315 .cmd = hmp_object_add, 1316 .command_completion = object_add_completion, 1317 .flags = "p", 1318 }, 1319 1320SRST 1321``object_add`` 1322 Create QOM object. 1323ERST 1324 1325 { 1326 .name = "object_del", 1327 .args_type = "id:s", 1328 .params = "id", 1329 .help = "destroy QOM object", 1330 .cmd = hmp_object_del, 1331 .command_completion = object_del_completion, 1332 .flags = "p", 1333 }, 1334 1335SRST 1336``object_del`` 1337 Destroy QOM object. 1338ERST 1339 1340#ifdef CONFIG_SLIRP 1341 { 1342 .name = "hostfwd_add", 1343 .args_type = "arg1:s,arg2:s?", 1344 .params = "[netdev_id] [tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport", 1345 .help = "redirect TCP or UDP connections from host to guest (requires -net user)", 1346 .cmd = hmp_hostfwd_add, 1347 }, 1348#endif 1349SRST 1350``hostfwd_add`` 1351 Redirect TCP or UDP connections from host to guest (requires -net user). 1352ERST 1353 1354#ifdef CONFIG_SLIRP 1355 { 1356 .name = "hostfwd_remove", 1357 .args_type = "arg1:s,arg2:s?", 1358 .params = "[netdev_id] [tcp|udp]:[hostaddr]:hostport", 1359 .help = "remove host-to-guest TCP or UDP redirection", 1360 .cmd = hmp_hostfwd_remove, 1361 }, 1362 1363#endif 1364SRST 1365``hostfwd_remove`` 1366 Remove host-to-guest TCP or UDP redirection. 1367ERST 1368 1369 { 1370 .name = "balloon", 1371 .args_type = "value:M", 1372 .params = "target", 1373 .help = "request VM to change its memory allocation (in MB)", 1374 .cmd = hmp_balloon, 1375 }, 1376 1377SRST 1378``balloon`` *value* 1379 Request VM to change its memory allocation to *value* (in MB). 1380ERST 1381 1382 { 1383 .name = "set_link", 1384 .args_type = "name:s,up:b", 1385 .params = "name on|off", 1386 .help = "change the link status of a network adapter", 1387 .cmd = hmp_set_link, 1388 .command_completion = set_link_completion, 1389 }, 1390 1391SRST 1392``set_link`` *name* ``[on|off]`` 1393 Switch link *name* on (i.e. up) or off (i.e. down). 1394ERST 1395 1396 { 1397 .name = "watchdog_action", 1398 .args_type = "action:s", 1399 .params = "[reset|shutdown|poweroff|pause|debug|none]", 1400 .help = "change watchdog action", 1401 .cmd = hmp_watchdog_action, 1402 .command_completion = watchdog_action_completion, 1403 }, 1404 1405SRST 1406``watchdog_action`` 1407 Change watchdog action. 1408ERST 1409 1410 { 1411 .name = "nbd_server_start", 1412 .args_type = "all:-a,writable:-w,uri:s", 1413 .params = "nbd_server_start [-a] [-w] host:port", 1414 .help = "serve block devices on the given host and port", 1415 .cmd = hmp_nbd_server_start, 1416 .flags = "p", 1417 }, 1418SRST 1419``nbd_server_start`` *host*:*port* 1420 Start an NBD server on the given host and/or port. If the ``-a`` 1421 option is included, all of the virtual machine's block devices that 1422 have an inserted media on them are automatically exported; in this case, 1423 the ``-w`` option makes the devices writable too. 1424ERST 1425 1426 { 1427 .name = "nbd_server_add", 1428 .args_type = "writable:-w,device:B,name:s?", 1429 .params = "nbd_server_add [-w] device [name]", 1430 .help = "export a block device via NBD", 1431 .cmd = hmp_nbd_server_add, 1432 .flags = "p", 1433 }, 1434SRST 1435``nbd_server_add`` *device* [ *name* ] 1436 Export a block device through QEMU's NBD server, which must be started 1437 beforehand with ``nbd_server_start``. The ``-w`` option makes the 1438 exported device writable too. The export name is controlled by *name*, 1439 defaulting to *device*. 1440ERST 1441 1442 { 1443 .name = "nbd_server_remove", 1444 .args_type = "force:-f,name:s", 1445 .params = "nbd_server_remove [-f] name", 1446 .help = "remove an export previously exposed via NBD", 1447 .cmd = hmp_nbd_server_remove, 1448 .flags = "p", 1449 }, 1450SRST 1451``nbd_server_remove [-f]`` *name* 1452 Stop exporting a block device through QEMU's NBD server, which was 1453 previously started with ``nbd_server_add``. The ``-f`` 1454 option forces the server to drop the export immediately even if 1455 clients are connected; otherwise the command fails unless there are no 1456 clients. 1457ERST 1458 1459 { 1460 .name = "nbd_server_stop", 1461 .args_type = "", 1462 .params = "nbd_server_stop", 1463 .help = "stop serving block devices using the NBD protocol", 1464 .cmd = hmp_nbd_server_stop, 1465 .flags = "p", 1466 }, 1467SRST 1468``nbd_server_stop`` 1469 Stop the QEMU embedded NBD server. 1470ERST 1471 1472 1473#if defined(TARGET_I386) 1474 1475 { 1476 .name = "mce", 1477 .args_type = "broadcast:-b,cpu_index:i,bank:i,status:l,mcg_status:l,addr:l,misc:l", 1478 .params = "[-b] cpu bank status mcgstatus addr misc", 1479 .help = "inject a MCE on the given CPU [and broadcast to other CPUs with -b option]", 1480 .cmd = hmp_mce, 1481 }, 1482 1483#endif 1484SRST 1485``mce`` *cpu* *bank* *status* *mcgstatus* *addr* *misc* 1486 Inject an MCE on the given CPU (x86 only). 1487ERST 1488 1489 { 1490 .name = "getfd", 1491 .args_type = "fdname:s", 1492 .params = "getfd name", 1493 .help = "receive a file descriptor via SCM rights and assign it a name", 1494 .cmd = hmp_getfd, 1495 .flags = "p", 1496 }, 1497 1498SRST 1499``getfd`` *fdname* 1500 If a file descriptor is passed alongside this command using the SCM_RIGHTS 1501 mechanism on unix sockets, it is stored using the name *fdname* for 1502 later use by other monitor commands. 1503ERST 1504 1505 { 1506 .name = "closefd", 1507 .args_type = "fdname:s", 1508 .params = "closefd name", 1509 .help = "close a file descriptor previously passed via SCM rights", 1510 .cmd = hmp_closefd, 1511 .flags = "p", 1512 }, 1513 1514SRST 1515``closefd`` *fdname* 1516 Close the file descriptor previously assigned to *fdname* using the 1517 ``getfd`` command. This is only needed if the file descriptor was never 1518 used by another monitor command. 1519ERST 1520 1521 { 1522 .name = "block_set_io_throttle", 1523 .args_type = "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l", 1524 .params = "device bps bps_rd bps_wr iops iops_rd iops_wr", 1525 .help = "change I/O throttle limits for a block drive", 1526 .cmd = hmp_block_set_io_throttle, 1527 .flags = "p", 1528 }, 1529 1530SRST 1531``block_set_io_throttle`` *device* *bps* *bps_rd* *bps_wr* *iops* *iops_rd* *iops_wr* 1532 Change I/O throttle limits for a block drive to 1533 *bps* *bps_rd* *bps_wr* *iops* *iops_rd* *iops_wr*. 1534 *device* can be a block device name, a qdev ID or a QOM path. 1535ERST 1536 1537 { 1538 .name = "set_password", 1539 .args_type = "protocol:s,password:s,display:-ds,connected:s?", 1540 .params = "protocol password [-d display] [action-if-connected]", 1541 .help = "set spice/vnc password", 1542 .cmd = hmp_set_password, 1543 }, 1544 1545SRST 1546``set_password [ vnc | spice ] password [ -d display ] [ action-if-connected ]`` 1547 Change spice/vnc password. *display* can be used with 'vnc' to specify 1548 which display to set the password on. *action-if-connected* specifies 1549 what should happen in case a connection is established: *fail* makes 1550 the password change fail. *disconnect* changes the password and 1551 disconnects the client. *keep* changes the password and keeps the 1552 connection up. *keep* is the default. 1553ERST 1554 1555 { 1556 .name = "expire_password", 1557 .args_type = "protocol:s,time:s,display:-ds", 1558 .params = "protocol time [-d display]", 1559 .help = "set spice/vnc password expire-time", 1560 .cmd = hmp_expire_password, 1561 }, 1562 1563SRST 1564``expire_password [ vnc | spice ] expire-time [ -d display ]`` 1565 Specify when a password for spice/vnc becomes invalid. 1566 *display* behaves the same as in ``set_password``. 1567 *expire-time* accepts: 1568 1569 ``now`` 1570 Invalidate password instantly. 1571 ``never`` 1572 Password stays valid forever. 1573 ``+``\ *nsec* 1574 Password stays valid for *nsec* seconds starting now. 1575 *nsec* 1576 Password is invalidated at the given time. *nsec* are the seconds 1577 passed since 1970, i.e. unix epoch. 1578 1579ERST 1580 1581 { 1582 .name = "chardev-add", 1583 .args_type = "args:s", 1584 .params = "args", 1585 .help = "add chardev", 1586 .cmd = hmp_chardev_add, 1587 .command_completion = chardev_add_completion, 1588 }, 1589 1590SRST 1591``chardev-add`` *args* 1592 chardev-add accepts the same parameters as the -chardev command line switch. 1593ERST 1594 1595 { 1596 .name = "chardev-change", 1597 .args_type = "id:s,args:s", 1598 .params = "id args", 1599 .help = "change chardev", 1600 .cmd = hmp_chardev_change, 1601 }, 1602 1603SRST 1604``chardev-change`` *args* 1605 chardev-change accepts existing chardev *id* and then the same arguments 1606 as the -chardev command line switch (except for "id"). 1607ERST 1608 1609 { 1610 .name = "chardev-remove", 1611 .args_type = "id:s", 1612 .params = "id", 1613 .help = "remove chardev", 1614 .cmd = hmp_chardev_remove, 1615 .command_completion = chardev_remove_completion, 1616 }, 1617 1618SRST 1619``chardev-remove`` *id* 1620 Removes the chardev *id*. 1621ERST 1622 1623 { 1624 .name = "chardev-send-break", 1625 .args_type = "id:s", 1626 .params = "id", 1627 .help = "send a break on chardev", 1628 .cmd = hmp_chardev_send_break, 1629 .command_completion = chardev_remove_completion, 1630 }, 1631 1632SRST 1633``chardev-send-break`` *id* 1634 Send a break on the chardev *id*. 1635ERST 1636 1637 { 1638 .name = "qemu-io", 1639 .args_type = "qdev:-d,device:B,command:s", 1640 .params = "[-d] [device] \"[command]\"", 1641 .help = "run a qemu-io command on a block device\n\t\t\t" 1642 "-d: [device] is a device ID rather than a " 1643 "drive ID or node name", 1644 .cmd = hmp_qemu_io, 1645 }, 1646 1647SRST 1648``qemu-io`` *device* *command* 1649 Executes a qemu-io command on the given block device. 1650ERST 1651 1652 { 1653 .name = "qom-list", 1654 .args_type = "path:s?", 1655 .params = "path", 1656 .help = "list QOM properties", 1657 .cmd = hmp_qom_list, 1658 .flags = "p", 1659 }, 1660 1661SRST 1662``qom-list`` [*path*] 1663 Print QOM properties of object at location *path* 1664ERST 1665 1666 { 1667 .name = "qom-get", 1668 .args_type = "path:s,property:s", 1669 .params = "path property", 1670 .help = "print QOM property", 1671 .cmd = hmp_qom_get, 1672 .flags = "p", 1673 }, 1674 1675SRST 1676``qom-get`` *path* *property* 1677 Print QOM property *property* of object at location *path* 1678ERST 1679 1680 { 1681 .name = "qom-set", 1682 .args_type = "json:-j,path:s,property:s,value:S", 1683 .params = "[-j] path property value", 1684 .help = "set QOM property.\n\t\t\t" 1685 "-j: the value is specified in json format.", 1686 .cmd = hmp_qom_set, 1687 .flags = "p", 1688 }, 1689 1690SRST 1691``qom-set`` *path* *property* *value* 1692 Set QOM property *property* of object at location *path* to value *value* 1693ERST 1694 1695 { 1696 .name = "replay_break", 1697 .args_type = "icount:l", 1698 .params = "icount", 1699 .help = "set breakpoint at the specified instruction count", 1700 .cmd = hmp_replay_break, 1701 }, 1702 1703SRST 1704``replay_break`` *icount* 1705 Set replay breakpoint at instruction count *icount*. 1706 Execution stops when the specified instruction is reached. 1707 There can be at most one breakpoint. When breakpoint is set, any prior 1708 one is removed. The breakpoint may be set only in replay mode and only 1709 "in the future", i.e. at instruction counts greater than the current one. 1710 The current instruction count can be observed with ``info replay``. 1711ERST 1712 1713 { 1714 .name = "replay_delete_break", 1715 .args_type = "", 1716 .params = "", 1717 .help = "remove replay breakpoint", 1718 .cmd = hmp_replay_delete_break, 1719 }, 1720 1721SRST 1722``replay_delete_break`` 1723 Remove replay breakpoint which was previously set with ``replay_break``. 1724 The command is ignored when there are no replay breakpoints. 1725ERST 1726 1727 { 1728 .name = "replay_seek", 1729 .args_type = "icount:l", 1730 .params = "icount", 1731 .help = "replay execution to the specified instruction count", 1732 .cmd = hmp_replay_seek, 1733 }, 1734 1735SRST 1736``replay_seek`` *icount* 1737 Automatically proceed to the instruction count *icount*, when 1738 replaying the execution. The command automatically loads nearest 1739 snapshot and replays the execution to find the desired instruction. 1740 When there is no preceding snapshot or the execution is not replayed, 1741 then the command fails. 1742 *icount* for the reference may be observed with ``info replay`` command. 1743ERST 1744 1745 { 1746 .name = "info", 1747 .args_type = "item:s?", 1748 .params = "[subcommand]", 1749 .help = "show various information about the system state", 1750 .cmd = hmp_info_help, 1751 .sub_table = hmp_info_cmds, 1752 .flags = "p", 1753 }, 1754 1755SRST 1756``calc_dirty_rate`` *second* 1757 Start a round of dirty rate measurement with the period specified in *second*. 1758 The result of the dirty rate measurement may be observed with ``info 1759 dirty_rate`` command. 1760ERST 1761 1762 { 1763 .name = "calc_dirty_rate", 1764 .args_type = "dirty_ring:-r,dirty_bitmap:-b,second:l,sample_pages_per_GB:l?", 1765 .params = "[-r] [-b] second [sample_pages_per_GB]", 1766 .help = "start a round of guest dirty rate measurement (using -r to" 1767 "\n\t\t\t specify dirty ring as the method of calculation and" 1768 "\n\t\t\t -b to specify dirty bitmap as method of calculation)", 1769 .cmd = hmp_calc_dirty_rate, 1770 }, 1771 1772SRST 1773``set_vcpu_dirty_limit`` 1774 Set dirty page rate limit on virtual CPU, the information about all the 1775 virtual CPU dirty limit status can be observed with ``info vcpu_dirty_limit`` 1776 command. 1777ERST 1778 1779 { 1780 .name = "set_vcpu_dirty_limit", 1781 .args_type = "dirty_rate:l,cpu_index:l?", 1782 .params = "dirty_rate [cpu_index]", 1783 .help = "set dirty page rate limit, use cpu_index to set limit" 1784 "\n\t\t\t\t\t on a specified virtual cpu", 1785 .cmd = hmp_set_vcpu_dirty_limit, 1786 }, 1787 1788SRST 1789``cancel_vcpu_dirty_limit`` 1790 Cancel dirty page rate limit on virtual CPU, the information about all the 1791 virtual CPU dirty limit status can be observed with ``info vcpu_dirty_limit`` 1792 command. 1793ERST 1794 1795 { 1796 .name = "cancel_vcpu_dirty_limit", 1797 .args_type = "cpu_index:l?", 1798 .params = "[cpu_index]", 1799 .help = "cancel dirty page rate limit, use cpu_index to cancel" 1800 "\n\t\t\t\t\t limit on a specified virtual cpu", 1801 .cmd = hmp_cancel_vcpu_dirty_limit, 1802 }, 1803