xref: /openbmc/qemu/hmp-commands.hx (revision 07a32d6b)
1HXCOMM Use DEFHEADING() to define headings in both help text and texi
2HXCOMM Text between STEXI and ETEXI are copied to texi 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 texi and C
7
8STEXI
9@table @option
10ETEXI
11
12    {
13        .name       = "help|?",
14        .args_type  = "name:S?",
15        .params     = "[cmd]",
16        .help       = "show the help",
17        .mhandler.cmd = do_help_cmd,
18    },
19
20STEXI
21@item help or ? [@var{cmd}]
22@findex help
23Show the help for all commands or just for command @var{cmd}.
24ETEXI
25
26    {
27        .name       = "commit",
28        .args_type  = "device:B",
29        .params     = "device|all",
30        .help       = "commit changes to the disk images (if -snapshot is used) or backing files",
31        .mhandler.cmd = do_commit,
32    },
33
34STEXI
35@item commit
36@findex commit
37Commit changes to the disk images (if -snapshot is used) or backing files.
38If the backing file is smaller than the snapshot, then the backing file will be
39resized to be the same size as the snapshot.  If the snapshot is smaller than
40the backing file, the backing file will not be truncated.  If you want the
41backing file to match the size of the smaller snapshot, you can safely truncate
42it yourself once the commit operation successfully completes.
43ETEXI
44
45    {
46        .name       = "q|quit",
47        .args_type  = "",
48        .params     = "",
49        .help       = "quit the emulator",
50        .user_print = monitor_user_noop,
51        .mhandler.cmd = hmp_quit,
52    },
53
54STEXI
55@item q or quit
56@findex quit
57Quit the emulator.
58ETEXI
59
60    {
61        .name       = "block_resize",
62        .args_type  = "device:B,size:o",
63        .params     = "device size",
64        .help       = "resize a block image",
65        .mhandler.cmd = hmp_block_resize,
66    },
67
68STEXI
69@item block_resize
70@findex block_resize
71Resize a block image while a guest is running.  Usually requires guest
72action to see the updated size.  Resize to a lower size is supported,
73but should be used with extreme caution.  Note that this command only
74resizes image files, it can not resize block devices like LVM volumes.
75ETEXI
76
77    {
78        .name       = "block_stream",
79        .args_type  = "device:B,speed:o?,base:s?",
80        .params     = "device [speed [base]]",
81        .help       = "copy data from a backing file into a block device",
82        .mhandler.cmd = hmp_block_stream,
83    },
84
85STEXI
86@item block_stream
87@findex block_stream
88Copy data from a backing file into a block device.
89ETEXI
90
91    {
92        .name       = "block_job_set_speed",
93        .args_type  = "device:B,speed:o",
94        .params     = "device speed",
95        .help       = "set maximum speed for a background block operation",
96        .mhandler.cmd = hmp_block_job_set_speed,
97    },
98
99STEXI
100@item block_job_set_speed
101@findex block_job_set_speed
102Set maximum speed for a background block operation.
103ETEXI
104
105    {
106        .name       = "block_job_cancel",
107        .args_type  = "force:-f,device:B",
108        .params     = "[-f] device",
109        .help       = "stop an active background block operation (use -f"
110                      "\n\t\t\t if the operation is currently paused)",
111        .mhandler.cmd = hmp_block_job_cancel,
112    },
113
114STEXI
115@item block_job_cancel
116@findex block_job_cancel
117Stop an active background block operation (streaming, mirroring).
118ETEXI
119
120    {
121        .name       = "block_job_complete",
122        .args_type  = "device:B",
123        .params     = "device",
124        .help       = "stop an active background block operation",
125        .mhandler.cmd = hmp_block_job_complete,
126    },
127
128STEXI
129@item block_job_complete
130@findex block_job_complete
131Manually trigger completion of an active background block operation.
132For mirroring, this will switch the device to the destination path.
133ETEXI
134
135    {
136        .name       = "block_job_pause",
137        .args_type  = "device:B",
138        .params     = "device",
139        .help       = "pause an active background block operation",
140        .mhandler.cmd = hmp_block_job_pause,
141    },
142
143STEXI
144@item block_job_pause
145@findex block_job_pause
146Pause an active block streaming operation.
147ETEXI
148
149    {
150        .name       = "block_job_resume",
151        .args_type  = "device:B",
152        .params     = "device",
153        .help       = "resume a paused background block operation",
154        .mhandler.cmd = hmp_block_job_resume,
155    },
156
157STEXI
158@item block_job_resume
159@findex block_job_resume
160Resume a paused block streaming operation.
161ETEXI
162
163    {
164        .name       = "eject",
165        .args_type  = "force:-f,device:B",
166        .params     = "[-f] device",
167        .help       = "eject a removable medium (use -f to force it)",
168        .mhandler.cmd = hmp_eject,
169    },
170
171STEXI
172@item eject [-f] @var{device}
173@findex eject
174Eject a removable medium (use -f to force it).
175ETEXI
176
177    {
178        .name       = "drive_del",
179        .args_type  = "id:B",
180        .params     = "device",
181        .help       = "remove host block device",
182        .user_print = monitor_user_noop,
183        .mhandler.cmd_new = do_drive_del,
184    },
185
186STEXI
187@item drive_del @var{device}
188@findex drive_del
189Remove host block device.  The result is that guest generated IO is no longer
190submitted against the host device underlying the disk.  Once a drive has
191been deleted, the QEMU Block layer returns -EIO which results in IO
192errors in the guest for applications that are reading/writing to the device.
193These errors are always reported to the guest, regardless of the drive's error
194actions (drive options rerror, werror).
195ETEXI
196
197    {
198        .name       = "change",
199        .args_type  = "device:B,target:F,arg:s?",
200        .params     = "device filename [format]",
201        .help       = "change a removable medium, optional format",
202        .mhandler.cmd = hmp_change,
203    },
204
205STEXI
206@item change @var{device} @var{setting}
207@findex change
208
209Change the configuration of a device.
210
211@table @option
212@item change @var{diskdevice} @var{filename} [@var{format}]
213Change the medium for a removable disk device to point to @var{filename}. eg
214
215@example
216(qemu) change ide1-cd0 /path/to/some.iso
217@end example
218
219@var{format} is optional.
220
221@item change vnc @var{display},@var{options}
222Change the configuration of the VNC server. The valid syntax for @var{display}
223and @var{options} are described at @ref{sec_invocation}. eg
224
225@example
226(qemu) change vnc localhost:1
227@end example
228
229@item change vnc password [@var{password}]
230
231Change the password associated with the VNC server. If the new password is not
232supplied, the monitor will prompt for it to be entered. VNC passwords are only
233significant up to 8 letters. eg
234
235@example
236(qemu) change vnc password
237Password: ********
238@end example
239
240@end table
241ETEXI
242
243    {
244        .name       = "screendump",
245        .args_type  = "filename:F",
246        .params     = "filename",
247        .help       = "save screen into PPM image 'filename'",
248        .mhandler.cmd = hmp_screen_dump,
249    },
250
251STEXI
252@item screendump @var{filename}
253@findex screendump
254Save screen into PPM image @var{filename}.
255ETEXI
256
257    {
258        .name       = "logfile",
259        .args_type  = "filename:F",
260        .params     = "filename",
261        .help       = "output logs to 'filename'",
262        .mhandler.cmd = do_logfile,
263    },
264
265STEXI
266@item logfile @var{filename}
267@findex logfile
268Output logs to @var{filename}.
269ETEXI
270
271    {
272        .name       = "trace-event",
273        .args_type  = "name:s,option:b",
274        .params     = "name on|off",
275        .help       = "changes status of a specific trace event",
276        .mhandler.cmd = do_trace_event_set_state,
277    },
278
279STEXI
280@item trace-event
281@findex trace-event
282changes status of a trace event
283ETEXI
284
285#if defined(CONFIG_TRACE_SIMPLE)
286    {
287        .name       = "trace-file",
288        .args_type  = "op:s?,arg:F?",
289        .params     = "on|off|flush|set [arg]",
290        .help       = "open, close, or flush trace file, or set a new file name",
291        .mhandler.cmd = do_trace_file,
292    },
293
294STEXI
295@item trace-file on|off|flush
296@findex trace-file
297Open, close, or flush the trace file.  If no argument is given, the status of the trace file is displayed.
298ETEXI
299#endif
300
301    {
302        .name       = "log",
303        .args_type  = "items:s",
304        .params     = "item1[,...]",
305        .help       = "activate logging of the specified items",
306        .mhandler.cmd = do_log,
307    },
308
309STEXI
310@item log @var{item1}[,...]
311@findex log
312Activate logging of the specified items.
313ETEXI
314
315    {
316        .name       = "savevm",
317        .args_type  = "name:s?",
318        .params     = "[tag|id]",
319        .help       = "save a VM snapshot. If no tag or id are provided, a new snapshot is created",
320        .mhandler.cmd = do_savevm,
321    },
322
323STEXI
324@item savevm [@var{tag}|@var{id}]
325@findex savevm
326Create a snapshot of the whole virtual machine. If @var{tag} is
327provided, it is used as human readable identifier. If there is already
328a snapshot with the same tag or ID, it is replaced. More info at
329@ref{vm_snapshots}.
330ETEXI
331
332    {
333        .name       = "loadvm",
334        .args_type  = "name:s",
335        .params     = "tag|id",
336        .help       = "restore a VM snapshot from its tag or id",
337        .mhandler.cmd = do_loadvm,
338        .command_completion = loadvm_completion,
339    },
340
341STEXI
342@item loadvm @var{tag}|@var{id}
343@findex loadvm
344Set the whole virtual machine to the snapshot identified by the tag
345@var{tag} or the unique snapshot ID @var{id}.
346ETEXI
347
348    {
349        .name       = "delvm",
350        .args_type  = "name:s",
351        .params     = "tag|id",
352        .help       = "delete a VM snapshot from its tag or id",
353        .mhandler.cmd = do_delvm,
354        .command_completion = delvm_completion,
355    },
356
357STEXI
358@item delvm @var{tag}|@var{id}
359@findex delvm
360Delete the snapshot identified by @var{tag} or @var{id}.
361ETEXI
362
363    {
364        .name       = "singlestep",
365        .args_type  = "option:s?",
366        .params     = "[on|off]",
367        .help       = "run emulation in singlestep mode or switch to normal mode",
368        .mhandler.cmd = do_singlestep,
369    },
370
371STEXI
372@item singlestep [off]
373@findex singlestep
374Run the emulation in single step mode.
375If called with option off, the emulation returns to normal mode.
376ETEXI
377
378    {
379        .name       = "stop",
380        .args_type  = "",
381        .params     = "",
382        .help       = "stop emulation",
383        .mhandler.cmd = hmp_stop,
384    },
385
386STEXI
387@item stop
388@findex stop
389Stop emulation.
390ETEXI
391
392    {
393        .name       = "c|cont",
394        .args_type  = "",
395        .params     = "",
396        .help       = "resume emulation",
397        .mhandler.cmd = hmp_cont,
398    },
399
400STEXI
401@item c or cont
402@findex cont
403Resume emulation.
404ETEXI
405
406    {
407        .name       = "system_wakeup",
408        .args_type  = "",
409        .params     = "",
410        .help       = "wakeup guest from suspend",
411        .mhandler.cmd = hmp_system_wakeup,
412    },
413
414STEXI
415@item system_wakeup
416@findex system_wakeup
417Wakeup guest from suspend.
418ETEXI
419
420    {
421        .name       = "gdbserver",
422        .args_type  = "device:s?",
423        .params     = "[device]",
424        .help       = "start gdbserver on given device (default 'tcp::1234'), stop with 'none'",
425        .mhandler.cmd = do_gdbserver,
426    },
427
428STEXI
429@item gdbserver [@var{port}]
430@findex gdbserver
431Start gdbserver session (default @var{port}=1234)
432ETEXI
433
434    {
435        .name       = "x",
436        .args_type  = "fmt:/,addr:l",
437        .params     = "/fmt addr",
438        .help       = "virtual memory dump starting at 'addr'",
439        .mhandler.cmd = do_memory_dump,
440    },
441
442STEXI
443@item x/fmt @var{addr}
444@findex x
445Virtual memory dump starting at @var{addr}.
446ETEXI
447
448    {
449        .name       = "xp",
450        .args_type  = "fmt:/,addr:l",
451        .params     = "/fmt addr",
452        .help       = "physical memory dump starting at 'addr'",
453        .mhandler.cmd = do_physical_memory_dump,
454    },
455
456STEXI
457@item xp /@var{fmt} @var{addr}
458@findex xp
459Physical memory dump starting at @var{addr}.
460
461@var{fmt} is a format which tells the command how to format the
462data. Its syntax is: @option{/@{count@}@{format@}@{size@}}
463
464@table @var
465@item count
466is the number of items to be dumped.
467
468@item format
469can be x (hex), d (signed decimal), u (unsigned decimal), o (octal),
470c (char) or i (asm instruction).
471
472@item size
473can be b (8 bits), h (16 bits), w (32 bits) or g (64 bits). On x86,
474@code{h} or @code{w} can be specified with the @code{i} format to
475respectively select 16 or 32 bit code instruction size.
476
477@end table
478
479Examples:
480@itemize
481@item
482Dump 10 instructions at the current instruction pointer:
483@example
484(qemu) x/10i $eip
4850x90107063:  ret
4860x90107064:  sti
4870x90107065:  lea    0x0(%esi,1),%esi
4880x90107069:  lea    0x0(%edi,1),%edi
4890x90107070:  ret
4900x90107071:  jmp    0x90107080
4910x90107073:  nop
4920x90107074:  nop
4930x90107075:  nop
4940x90107076:  nop
495@end example
496
497@item
498Dump 80 16 bit values at the start of the video memory.
499@smallexample
500(qemu) xp/80hx 0xb8000
5010x000b8000: 0x0b50 0x0b6c 0x0b65 0x0b78 0x0b38 0x0b36 0x0b2f 0x0b42
5020x000b8010: 0x0b6f 0x0b63 0x0b68 0x0b73 0x0b20 0x0b56 0x0b47 0x0b41
5030x000b8020: 0x0b42 0x0b69 0x0b6f 0x0b73 0x0b20 0x0b63 0x0b75 0x0b72
5040x000b8030: 0x0b72 0x0b65 0x0b6e 0x0b74 0x0b2d 0x0b63 0x0b76 0x0b73
5050x000b8040: 0x0b20 0x0b30 0x0b35 0x0b20 0x0b4e 0x0b6f 0x0b76 0x0b20
5060x000b8050: 0x0b32 0x0b30 0x0b30 0x0b33 0x0720 0x0720 0x0720 0x0720
5070x000b8060: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720
5080x000b8070: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720
5090x000b8080: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720
5100x000b8090: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720
511@end smallexample
512@end itemize
513ETEXI
514
515    {
516        .name       = "p|print",
517        .args_type  = "fmt:/,val:l",
518        .params     = "/fmt expr",
519        .help       = "print expression value (use $reg for CPU register access)",
520        .mhandler.cmd = do_print,
521    },
522
523STEXI
524@item p or print/@var{fmt} @var{expr}
525@findex print
526
527Print expression value. Only the @var{format} part of @var{fmt} is
528used.
529ETEXI
530
531    {
532        .name       = "i",
533        .args_type  = "fmt:/,addr:i,index:i.",
534        .params     = "/fmt addr",
535        .help       = "I/O port read",
536        .mhandler.cmd = do_ioport_read,
537    },
538
539STEXI
540Read I/O port.
541ETEXI
542
543    {
544        .name       = "o",
545        .args_type  = "fmt:/,addr:i,val:i",
546        .params     = "/fmt addr value",
547        .help       = "I/O port write",
548        .mhandler.cmd = do_ioport_write,
549    },
550
551STEXI
552Write to I/O port.
553ETEXI
554
555    {
556        .name       = "sendkey",
557        .args_type  = "keys:s,hold-time:i?",
558        .params     = "keys [hold_ms]",
559        .help       = "send keys to the VM (e.g. 'sendkey ctrl-alt-f1', default hold time=100 ms)",
560        .mhandler.cmd = hmp_send_key,
561        .command_completion = sendkey_completion,
562    },
563
564STEXI
565@item sendkey @var{keys}
566@findex sendkey
567
568Send @var{keys} to the guest. @var{keys} could be the name of the
569key or the raw value in hexadecimal format. Use @code{-} to press
570several keys simultaneously. Example:
571@example
572sendkey ctrl-alt-f1
573@end example
574
575This command is useful to send keys that your graphical user interface
576intercepts at low level, such as @code{ctrl-alt-f1} in X Window.
577ETEXI
578
579    {
580        .name       = "system_reset",
581        .args_type  = "",
582        .params     = "",
583        .help       = "reset the system",
584        .mhandler.cmd = hmp_system_reset,
585    },
586
587STEXI
588@item system_reset
589@findex system_reset
590
591Reset the system.
592ETEXI
593
594    {
595        .name       = "system_powerdown",
596        .args_type  = "",
597        .params     = "",
598        .help       = "send system power down event",
599        .mhandler.cmd = hmp_system_powerdown,
600    },
601
602STEXI
603@item system_powerdown
604@findex system_powerdown
605
606Power down the system (if supported).
607ETEXI
608
609    {
610        .name       = "sum",
611        .args_type  = "start:i,size:i",
612        .params     = "addr size",
613        .help       = "compute the checksum of a memory region",
614        .mhandler.cmd = do_sum,
615    },
616
617STEXI
618@item sum @var{addr} @var{size}
619@findex sum
620
621Compute the checksum of a memory region.
622ETEXI
623
624    {
625        .name       = "usb_add",
626        .args_type  = "devname:s",
627        .params     = "device",
628        .help       = "add USB device (e.g. 'host:bus.addr' or 'host:vendor_id:product_id')",
629        .mhandler.cmd = do_usb_add,
630    },
631
632STEXI
633@item usb_add @var{devname}
634@findex usb_add
635
636Add the USB device @var{devname}.  For details of available devices see
637@ref{usb_devices}
638ETEXI
639
640    {
641        .name       = "usb_del",
642        .args_type  = "devname:s",
643        .params     = "device",
644        .help       = "remove USB device 'bus.addr'",
645        .mhandler.cmd = do_usb_del,
646    },
647
648STEXI
649@item usb_del @var{devname}
650@findex usb_del
651
652Remove the USB device @var{devname} from the QEMU virtual USB
653hub. @var{devname} has the syntax @code{bus.addr}. Use the monitor
654command @code{info usb} to see the devices you can remove.
655ETEXI
656
657    {
658        .name       = "device_add",
659        .args_type  = "device:O",
660        .params     = "driver[,prop=value][,...]",
661        .help       = "add device, like -device on the command line",
662        .user_print = monitor_user_noop,
663        .mhandler.cmd_new = do_device_add,
664        .command_completion = device_add_completion,
665    },
666
667STEXI
668@item device_add @var{config}
669@findex device_add
670
671Add device.
672ETEXI
673
674    {
675        .name       = "device_del",
676        .args_type  = "id:s",
677        .params     = "device",
678        .help       = "remove device",
679        .mhandler.cmd = hmp_device_del,
680        .command_completion = device_del_completion,
681    },
682
683STEXI
684@item device_del @var{id}
685@findex device_del
686
687Remove device @var{id}.
688ETEXI
689
690    {
691        .name       = "cpu",
692        .args_type  = "index:i",
693        .params     = "index",
694        .help       = "set the default CPU",
695        .mhandler.cmd = hmp_cpu,
696    },
697
698STEXI
699@item cpu @var{index}
700@findex cpu
701Set the default CPU.
702ETEXI
703
704    {
705        .name       = "mouse_move",
706        .args_type  = "dx_str:s,dy_str:s,dz_str:s?",
707        .params     = "dx dy [dz]",
708        .help       = "send mouse move events",
709        .mhandler.cmd = do_mouse_move,
710    },
711
712STEXI
713@item mouse_move @var{dx} @var{dy} [@var{dz}]
714@findex mouse_move
715Move the active mouse to the specified coordinates @var{dx} @var{dy}
716with optional scroll axis @var{dz}.
717ETEXI
718
719    {
720        .name       = "mouse_button",
721        .args_type  = "button_state:i",
722        .params     = "state",
723        .help       = "change mouse button state (1=L, 2=M, 4=R)",
724        .mhandler.cmd = do_mouse_button,
725    },
726
727STEXI
728@item mouse_button @var{val}
729@findex mouse_button
730Change the active mouse button state @var{val} (1=L, 2=M, 4=R).
731ETEXI
732
733    {
734        .name       = "mouse_set",
735        .args_type  = "index:i",
736        .params     = "index",
737        .help       = "set which mouse device receives events",
738        .mhandler.cmd = do_mouse_set,
739    },
740
741STEXI
742@item mouse_set @var{index}
743@findex mouse_set
744Set which mouse device receives events at given @var{index}, index
745can be obtained with
746@example
747info mice
748@end example
749ETEXI
750
751    {
752        .name       = "wavcapture",
753        .args_type  = "path:F,freq:i?,bits:i?,nchannels:i?",
754        .params     = "path [frequency [bits [channels]]]",
755        .help       = "capture audio to a wave file (default frequency=44100 bits=16 channels=2)",
756        .mhandler.cmd = do_wav_capture,
757    },
758STEXI
759@item wavcapture @var{filename} [@var{frequency} [@var{bits} [@var{channels}]]]
760@findex wavcapture
761Capture audio into @var{filename}. Using sample rate @var{frequency}
762bits per sample @var{bits} and number of channels @var{channels}.
763
764Defaults:
765@itemize @minus
766@item Sample rate = 44100 Hz - CD quality
767@item Bits = 16
768@item Number of channels = 2 - Stereo
769@end itemize
770ETEXI
771
772    {
773        .name       = "stopcapture",
774        .args_type  = "n:i",
775        .params     = "capture index",
776        .help       = "stop capture",
777        .mhandler.cmd = do_stop_capture,
778    },
779STEXI
780@item stopcapture @var{index}
781@findex stopcapture
782Stop capture with a given @var{index}, index can be obtained with
783@example
784info capture
785@end example
786ETEXI
787
788    {
789        .name       = "memsave",
790        .args_type  = "val:l,size:i,filename:s",
791        .params     = "addr size file",
792        .help       = "save to disk virtual memory dump starting at 'addr' of size 'size'",
793        .mhandler.cmd = hmp_memsave,
794    },
795
796STEXI
797@item memsave @var{addr} @var{size} @var{file}
798@findex memsave
799save to disk virtual memory dump starting at @var{addr} of size @var{size}.
800ETEXI
801
802    {
803        .name       = "pmemsave",
804        .args_type  = "val:l,size:i,filename:s",
805        .params     = "addr size file",
806        .help       = "save to disk physical memory dump starting at 'addr' of size 'size'",
807        .mhandler.cmd = hmp_pmemsave,
808    },
809
810STEXI
811@item pmemsave @var{addr} @var{size} @var{file}
812@findex pmemsave
813save to disk physical memory dump starting at @var{addr} of size @var{size}.
814ETEXI
815
816    {
817        .name       = "boot_set",
818        .args_type  = "bootdevice:s",
819        .params     = "bootdevice",
820        .help       = "define new values for the boot device list",
821        .mhandler.cmd = do_boot_set,
822    },
823
824STEXI
825@item boot_set @var{bootdevicelist}
826@findex boot_set
827
828Define new values for the boot device list. Those values will override
829the values specified on the command line through the @code{-boot} option.
830
831The values that can be specified here depend on the machine type, but are
832the same that can be specified in the @code{-boot} command line option.
833ETEXI
834
835#if defined(TARGET_I386) || defined(TARGET_S390X)
836    {
837        .name       = "nmi",
838        .args_type  = "",
839        .params     = "",
840        .help       = "inject an NMI on all guest's CPUs",
841        .mhandler.cmd = hmp_inject_nmi,
842    },
843#endif
844STEXI
845@item nmi @var{cpu}
846@findex nmi
847Inject an NMI (x86) or RESTART (s390x) on the given CPU.
848
849ETEXI
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        .mhandler.cmd = hmp_ringbuf_write,
857        .command_completion = ringbuf_write_completion,
858    },
859
860STEXI
861@item ringbuf_write @var{device} @var{data}
862@findex ringbuf_write
863Write @var{data} to ring buffer character device @var{device}.
864@var{data} must be a UTF-8 string.
865
866ETEXI
867
868    {
869        .name       = "ringbuf_read",
870        .args_type  = "device:s,size:i",
871        .params     = "device size",
872        .help       = "Read from a ring buffer character device",
873        .mhandler.cmd = hmp_ringbuf_read,
874        .command_completion = ringbuf_write_completion,
875    },
876
877STEXI
878@item ringbuf_read @var{device}
879@findex ringbuf_read
880Read and print up to @var{size} bytes from ring buffer character
881device @var{device}.
882Certain non-printable characters are printed \uXXXX, where XXXX is the
883character code in hexadecimal.  Character \ is printed \\.
884Bug: can screw up when the buffer contains invalid UTF-8 sequences,
885NUL characters, after the ring buffer lost data, and when reading
886stops because the size limit is reached.
887
888ETEXI
889
890    {
891        .name       = "migrate",
892        .args_type  = "detach:-d,blk:-b,inc:-i,uri:s",
893        .params     = "[-d] [-b] [-i] uri",
894        .help       = "migrate to URI (using -d to not wait for completion)"
895		      "\n\t\t\t -b for migration without shared storage with"
896		      " full copy of disk\n\t\t\t -i for migration without "
897		      "shared storage with incremental copy of disk "
898		      "(base image shared between src and destination)",
899        .mhandler.cmd = hmp_migrate,
900    },
901
902
903STEXI
904@item migrate [-d] [-b] [-i] @var{uri}
905@findex migrate
906Migrate to @var{uri} (using -d to not wait for completion).
907	-b for migration with full copy of disk
908	-i for migration with incremental copy of disk (base image is shared)
909ETEXI
910
911    {
912        .name       = "migrate_cancel",
913        .args_type  = "",
914        .params     = "",
915        .help       = "cancel the current VM migration",
916        .mhandler.cmd = hmp_migrate_cancel,
917    },
918
919STEXI
920@item migrate_cancel
921@findex migrate_cancel
922Cancel the current VM migration.
923
924ETEXI
925
926    {
927        .name       = "migrate_set_cache_size",
928        .args_type  = "value:o",
929        .params     = "value",
930        .help       = "set cache size (in bytes) for XBZRLE migrations,"
931                      "the cache size will be rounded down to the nearest "
932                      "power of 2.\n"
933                      "The cache size affects the number of cache misses."
934                      "In case of a high cache miss ratio you need to increase"
935                      " the cache size",
936        .mhandler.cmd = hmp_migrate_set_cache_size,
937    },
938
939STEXI
940@item migrate_set_cache_size @var{value}
941@findex migrate_set_cache_size
942Set cache size to @var{value} (in bytes) for xbzrle migrations.
943ETEXI
944
945    {
946        .name       = "migrate_set_speed",
947        .args_type  = "value:o",
948        .params     = "value",
949        .help       = "set maximum speed (in bytes) for migrations. "
950	"Defaults to MB if no size suffix is specified, ie. B/K/M/G/T",
951        .mhandler.cmd = hmp_migrate_set_speed,
952    },
953
954STEXI
955@item migrate_set_speed @var{value}
956@findex migrate_set_speed
957Set maximum speed to @var{value} (in bytes) for migrations.
958ETEXI
959
960    {
961        .name       = "migrate_set_downtime",
962        .args_type  = "value:T",
963        .params     = "value",
964        .help       = "set maximum tolerated downtime (in seconds) for migrations",
965        .mhandler.cmd = hmp_migrate_set_downtime,
966    },
967
968STEXI
969@item migrate_set_downtime @var{second}
970@findex migrate_set_downtime
971Set maximum tolerated downtime (in seconds) for migration.
972ETEXI
973
974    {
975        .name       = "migrate_set_capability",
976        .args_type  = "capability:s,state:b",
977        .params     = "capability state",
978        .help       = "Enable/Disable the usage of a capability for migration",
979        .mhandler.cmd = hmp_migrate_set_capability,
980        .command_completion = migrate_set_capability_completion,
981    },
982
983STEXI
984@item migrate_set_capability @var{capability} @var{state}
985@findex migrate_set_capability
986Enable/Disable the usage of a capability @var{capability} for migration.
987ETEXI
988
989    {
990        .name       = "client_migrate_info",
991        .args_type  = "protocol:s,hostname:s,port:i?,tls-port:i?,cert-subject:s?",
992        .params     = "protocol hostname port tls-port cert-subject",
993        .help       = "send migration info to spice/vnc client",
994        .user_print = monitor_user_noop,
995        .mhandler.cmd_async = client_migrate_info,
996        .flags      = MONITOR_CMD_ASYNC,
997    },
998
999STEXI
1000@item client_migrate_info @var{protocol} @var{hostname} @var{port} @var{tls-port} @var{cert-subject}
1001@findex client_migrate_info
1002Set the spice/vnc connection info for the migration target.  The spice/vnc
1003server will ask the spice/vnc client to automatically reconnect using the
1004new parameters (if specified) once the vm migration finished successfully.
1005ETEXI
1006
1007    {
1008        .name       = "dump-guest-memory",
1009        .args_type  = "paging:-p,zlib:-z,lzo:-l,snappy:-s,filename:F,begin:i?,length:i?",
1010        .params     = "[-p] [-z|-l|-s] filename [begin length]",
1011        .help       = "dump guest memory into file 'filename'.\n\t\t\t"
1012                      "-p: do paging to get guest's memory mapping.\n\t\t\t"
1013                      "-z: dump in kdump-compressed format, with zlib compression.\n\t\t\t"
1014                      "-l: dump in kdump-compressed format, with lzo compression.\n\t\t\t"
1015                      "-s: dump in kdump-compressed format, with snappy compression.\n\t\t\t"
1016                      "begin: the starting physical address.\n\t\t\t"
1017                      "length: the memory size, in bytes.",
1018        .mhandler.cmd = hmp_dump_guest_memory,
1019    },
1020
1021
1022STEXI
1023@item dump-guest-memory [-p] @var{filename} @var{begin} @var{length}
1024@item dump-guest-memory [-z|-l|-s] @var{filename}
1025@findex dump-guest-memory
1026Dump guest memory to @var{protocol}. The file can be processed with crash or
1027gdb. Without -z|-l|-s, the dump format is ELF.
1028        -p: do paging to get guest's memory mapping.
1029        -z: dump in kdump-compressed format, with zlib compression.
1030        -l: dump in kdump-compressed format, with lzo compression.
1031        -s: dump in kdump-compressed format, with snappy compression.
1032  filename: dump file name.
1033     begin: the starting physical address. It's optional, and should be
1034            specified together with length.
1035    length: the memory size, in bytes. It's optional, and should be specified
1036            together with begin.
1037ETEXI
1038
1039    {
1040        .name       = "snapshot_blkdev",
1041        .args_type  = "reuse:-n,device:B,snapshot-file:s?,format:s?",
1042        .params     = "[-n] device [new-image-file] [format]",
1043        .help       = "initiates a live snapshot\n\t\t\t"
1044                      "of device. If a new image file is specified, the\n\t\t\t"
1045                      "new image file will become the new root image.\n\t\t\t"
1046                      "If format is specified, the snapshot file will\n\t\t\t"
1047                      "be created in that format.\n\t\t\t"
1048                      "The default format is qcow2.  The -n flag requests QEMU\n\t\t\t"
1049                      "to reuse the image found in new-image-file, instead of\n\t\t\t"
1050                      "recreating it from scratch.",
1051        .mhandler.cmd = hmp_snapshot_blkdev,
1052    },
1053
1054STEXI
1055@item snapshot_blkdev
1056@findex snapshot_blkdev
1057Snapshot device, using snapshot file as target if provided
1058ETEXI
1059
1060    {
1061        .name       = "snapshot_blkdev_internal",
1062        .args_type  = "device:B,name:s",
1063        .params     = "device name",
1064        .help       = "take an internal snapshot of device.\n\t\t\t"
1065                      "The format of the image used by device must\n\t\t\t"
1066                      "support it, such as qcow2.\n\t\t\t",
1067        .mhandler.cmd = hmp_snapshot_blkdev_internal,
1068    },
1069
1070STEXI
1071@item snapshot_blkdev_internal
1072@findex snapshot_blkdev_internal
1073Take an internal snapshot on device if it support
1074ETEXI
1075
1076    {
1077        .name       = "snapshot_delete_blkdev_internal",
1078        .args_type  = "device:B,name:s,id:s?",
1079        .params     = "device name [id]",
1080        .help       = "delete an internal snapshot of device.\n\t\t\t"
1081                      "If id is specified, qemu will try delete\n\t\t\t"
1082                      "the snapshot matching both id and name.\n\t\t\t"
1083                      "The format of the image used by device must\n\t\t\t"
1084                      "support it, such as qcow2.\n\t\t\t",
1085        .mhandler.cmd = hmp_snapshot_delete_blkdev_internal,
1086    },
1087
1088STEXI
1089@item snapshot_delete_blkdev_internal
1090@findex snapshot_delete_blkdev_internal
1091Delete an internal snapshot on device if it support
1092ETEXI
1093
1094    {
1095        .name       = "drive_mirror",
1096        .args_type  = "reuse:-n,full:-f,device:B,target:s,format:s?",
1097        .params     = "[-n] [-f] device target [format]",
1098        .help       = "initiates live storage\n\t\t\t"
1099                      "migration for a device. The device's contents are\n\t\t\t"
1100                      "copied to the new image file, including data that\n\t\t\t"
1101                      "is written after the command is started.\n\t\t\t"
1102                      "The -n flag requests QEMU to reuse the image found\n\t\t\t"
1103                      "in new-image-file, instead of recreating it from scratch.\n\t\t\t"
1104                      "The -f flag requests QEMU to copy the whole disk,\n\t\t\t"
1105                      "so that the result does not need a backing file.\n\t\t\t",
1106        .mhandler.cmd = hmp_drive_mirror,
1107    },
1108STEXI
1109@item drive_mirror
1110@findex drive_mirror
1111Start mirroring a block device's writes to a new destination,
1112using the specified target.
1113ETEXI
1114
1115    {
1116        .name       = "drive_backup",
1117        .args_type  = "reuse:-n,full:-f,device:B,target:s,format:s?",
1118        .params     = "[-n] [-f] device target [format]",
1119        .help       = "initiates a point-in-time\n\t\t\t"
1120                      "copy for a device. The device's contents are\n\t\t\t"
1121                      "copied to the new image file, excluding data that\n\t\t\t"
1122                      "is written after the command is started.\n\t\t\t"
1123                      "The -n flag requests QEMU to reuse the image found\n\t\t\t"
1124                      "in new-image-file, instead of recreating it from scratch.\n\t\t\t"
1125                      "The -f flag requests QEMU to copy the whole disk,\n\t\t\t"
1126                      "so that the result does not need a backing file.\n\t\t\t",
1127        .mhandler.cmd = hmp_drive_backup,
1128    },
1129STEXI
1130@item drive_backup
1131@findex drive_backup
1132Start a point-in-time copy of a block device to a specificed target.
1133ETEXI
1134
1135    {
1136        .name       = "drive_add",
1137        .args_type  = "pci_addr:s,opts:s",
1138        .params     = "[[<domain>:]<bus>:]<slot>\n"
1139                      "[file=file][,if=type][,bus=n]\n"
1140                      "[,unit=m][,media=d][,index=i]\n"
1141                      "[,cyls=c,heads=h,secs=s[,trans=t]]\n"
1142                      "[,snapshot=on|off][,cache=on|off]\n"
1143                      "[,readonly=on|off][,copy-on-read=on|off]",
1144        .help       = "add drive to PCI storage controller",
1145        .mhandler.cmd = drive_hot_add,
1146    },
1147
1148STEXI
1149@item drive_add
1150@findex drive_add
1151Add drive to PCI storage controller.
1152ETEXI
1153
1154#if defined(CONFIG_PCI_HOTPLUG_OLD)
1155    {
1156        .name       = "pci_add",
1157        .args_type  = "pci_addr:s,type:s,opts:s?",
1158        .params     = "auto|[[<domain>:]<bus>:]<slot> nic|storage [[vlan=n][,macaddr=addr][,model=type]] [file=file][,if=type][,bus=nr]...",
1159        .help       = "hot-add PCI device",
1160        .mhandler.cmd = pci_device_hot_add,
1161    },
1162#endif
1163
1164STEXI
1165@item pci_add
1166@findex pci_add
1167Hot-add PCI device.
1168ETEXI
1169
1170#if defined(CONFIG_PCI_HOTPLUG_OLD)
1171    {
1172        .name       = "pci_del",
1173        .args_type  = "pci_addr:s",
1174        .params     = "[[<domain>:]<bus>:]<slot>",
1175        .help       = "hot remove PCI device",
1176        .mhandler.cmd = do_pci_device_hot_remove,
1177    },
1178#endif
1179
1180STEXI
1181@item pci_del
1182@findex pci_del
1183Hot remove PCI device.
1184ETEXI
1185
1186    {
1187        .name       = "pcie_aer_inject_error",
1188        .args_type  = "advisory_non_fatal:-a,correctable:-c,"
1189	              "id:s,error_status:s,"
1190	              "header0:i?,header1:i?,header2:i?,header3:i?,"
1191	              "prefix0:i?,prefix1:i?,prefix2:i?,prefix3:i?",
1192        .params     = "[-a] [-c] id "
1193                      "<error_status> [<tlp header> [<tlp header prefix>]]",
1194        .help       = "inject pcie aer error\n\t\t\t"
1195	              " -a for advisory non fatal error\n\t\t\t"
1196	              " -c for correctable error\n\t\t\t"
1197                      "<id> = qdev device id\n\t\t\t"
1198                      "<error_status> = error string or 32bit\n\t\t\t"
1199                      "<tlb header> = 32bit x 4\n\t\t\t"
1200                      "<tlb header prefix> = 32bit x 4",
1201        .user_print  = pcie_aer_inject_error_print,
1202        .mhandler.cmd_new = do_pcie_aer_inject_error,
1203    },
1204
1205STEXI
1206@item pcie_aer_inject_error
1207@findex pcie_aer_inject_error
1208Inject PCIe AER error
1209ETEXI
1210
1211    {
1212        .name       = "host_net_add",
1213        .args_type  = "device:s,opts:s?",
1214        .params     = "tap|user|socket|vde|netmap|bridge|vhost-user|dump [options]",
1215        .help       = "add host VLAN client",
1216        .mhandler.cmd = net_host_device_add,
1217        .command_completion = host_net_add_completion,
1218    },
1219
1220STEXI
1221@item host_net_add
1222@findex host_net_add
1223Add host VLAN client.
1224ETEXI
1225
1226    {
1227        .name       = "host_net_remove",
1228        .args_type  = "vlan_id:i,device:s",
1229        .params     = "vlan_id name",
1230        .help       = "remove host VLAN client",
1231        .mhandler.cmd = net_host_device_remove,
1232        .command_completion = host_net_remove_completion,
1233    },
1234
1235STEXI
1236@item host_net_remove
1237@findex host_net_remove
1238Remove host VLAN client.
1239ETEXI
1240
1241    {
1242        .name       = "netdev_add",
1243        .args_type  = "netdev:O",
1244        .params     = "[user|tap|socket|vde|bridge|hubport|netmap|vhost-user],id=str[,prop=value][,...]",
1245        .help       = "add host network device",
1246        .mhandler.cmd = hmp_netdev_add,
1247        .command_completion = netdev_add_completion,
1248    },
1249
1250STEXI
1251@item netdev_add
1252@findex netdev_add
1253Add host network device.
1254ETEXI
1255
1256    {
1257        .name       = "netdev_del",
1258        .args_type  = "id:s",
1259        .params     = "id",
1260        .help       = "remove host network device",
1261        .mhandler.cmd = hmp_netdev_del,
1262        .command_completion = netdev_del_completion,
1263    },
1264
1265STEXI
1266@item netdev_del
1267@findex netdev_del
1268Remove host network device.
1269ETEXI
1270
1271    {
1272        .name       = "object_add",
1273        .args_type  = "object:O",
1274        .params     = "[qom-type=]type,id=str[,prop=value][,...]",
1275        .help       = "create QOM object",
1276        .mhandler.cmd = hmp_object_add,
1277        .command_completion = object_add_completion,
1278    },
1279
1280STEXI
1281@item object_add
1282@findex object_add
1283Create QOM object.
1284ETEXI
1285
1286    {
1287        .name       = "object_del",
1288        .args_type  = "id:s",
1289        .params     = "id",
1290        .help       = "destroy QOM object",
1291        .mhandler.cmd = hmp_object_del,
1292        .command_completion = object_del_completion,
1293    },
1294
1295STEXI
1296@item object_del
1297@findex object_del
1298Destroy QOM object.
1299ETEXI
1300
1301#ifdef CONFIG_SLIRP
1302    {
1303        .name       = "hostfwd_add",
1304        .args_type  = "arg1:s,arg2:s?,arg3:s?",
1305        .params     = "[vlan_id name] [tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport",
1306        .help       = "redirect TCP or UDP connections from host to guest (requires -net user)",
1307        .mhandler.cmd = net_slirp_hostfwd_add,
1308    },
1309#endif
1310STEXI
1311@item hostfwd_add
1312@findex hostfwd_add
1313Redirect TCP or UDP connections from host to guest (requires -net user).
1314ETEXI
1315
1316#ifdef CONFIG_SLIRP
1317    {
1318        .name       = "hostfwd_remove",
1319        .args_type  = "arg1:s,arg2:s?,arg3:s?",
1320        .params     = "[vlan_id name] [tcp|udp]:[hostaddr]:hostport",
1321        .help       = "remove host-to-guest TCP or UDP redirection",
1322        .mhandler.cmd = net_slirp_hostfwd_remove,
1323    },
1324
1325#endif
1326STEXI
1327@item hostfwd_remove
1328@findex hostfwd_remove
1329Remove host-to-guest TCP or UDP redirection.
1330ETEXI
1331
1332    {
1333        .name       = "balloon",
1334        .args_type  = "value:M",
1335        .params     = "target",
1336        .help       = "request VM to change its memory allocation (in MB)",
1337        .mhandler.cmd = hmp_balloon,
1338    },
1339
1340STEXI
1341@item balloon @var{value}
1342@findex balloon
1343Request VM to change its memory allocation to @var{value} (in MB).
1344ETEXI
1345
1346    {
1347        .name       = "set_link",
1348        .args_type  = "name:s,up:b",
1349        .params     = "name on|off",
1350        .help       = "change the link status of a network adapter",
1351        .mhandler.cmd = hmp_set_link,
1352        .command_completion = set_link_completion,
1353    },
1354
1355STEXI
1356@item set_link @var{name} [on|off]
1357@findex set_link
1358Switch link @var{name} on (i.e. up) or off (i.e. down).
1359ETEXI
1360
1361    {
1362        .name       = "watchdog_action",
1363        .args_type  = "action:s",
1364        .params     = "[reset|shutdown|poweroff|pause|debug|none]",
1365        .help       = "change watchdog action",
1366        .mhandler.cmd = do_watchdog_action,
1367        .command_completion = watchdog_action_completion,
1368    },
1369
1370STEXI
1371@item watchdog_action
1372@findex watchdog_action
1373Change watchdog action.
1374ETEXI
1375
1376    {
1377        .name       = "acl_show",
1378        .args_type  = "aclname:s",
1379        .params     = "aclname",
1380        .help       = "list rules in the access control list",
1381        .mhandler.cmd = do_acl_show,
1382    },
1383
1384STEXI
1385@item acl_show @var{aclname}
1386@findex acl_show
1387List all the matching rules in the access control list, and the default
1388policy. There are currently two named access control lists,
1389@var{vnc.x509dname} and @var{vnc.username} matching on the x509 client
1390certificate distinguished name, and SASL username respectively.
1391ETEXI
1392
1393    {
1394        .name       = "acl_policy",
1395        .args_type  = "aclname:s,policy:s",
1396        .params     = "aclname allow|deny",
1397        .help       = "set default access control list policy",
1398        .mhandler.cmd = do_acl_policy,
1399    },
1400
1401STEXI
1402@item acl_policy @var{aclname} @code{allow|deny}
1403@findex acl_policy
1404Set the default access control list policy, used in the event that
1405none of the explicit rules match. The default policy at startup is
1406always @code{deny}.
1407ETEXI
1408
1409    {
1410        .name       = "acl_add",
1411        .args_type  = "aclname:s,match:s,policy:s,index:i?",
1412        .params     = "aclname match allow|deny [index]",
1413        .help       = "add a match rule to the access control list",
1414        .mhandler.cmd = do_acl_add,
1415    },
1416
1417STEXI
1418@item acl_add @var{aclname} @var{match} @code{allow|deny} [@var{index}]
1419@findex acl_add
1420Add a match rule to the access control list, allowing or denying access.
1421The match will normally be an exact username or x509 distinguished name,
1422but can optionally include wildcard globs. eg @code{*@@EXAMPLE.COM} to
1423allow all users in the @code{EXAMPLE.COM} kerberos realm. The match will
1424normally be appended to the end of the ACL, but can be inserted
1425earlier in the list if the optional @var{index} parameter is supplied.
1426ETEXI
1427
1428    {
1429        .name       = "acl_remove",
1430        .args_type  = "aclname:s,match:s",
1431        .params     = "aclname match",
1432        .help       = "remove a match rule from the access control list",
1433        .mhandler.cmd = do_acl_remove,
1434    },
1435
1436STEXI
1437@item acl_remove @var{aclname} @var{match}
1438@findex acl_remove
1439Remove the specified match rule from the access control list.
1440ETEXI
1441
1442    {
1443        .name       = "acl_reset",
1444        .args_type  = "aclname:s",
1445        .params     = "aclname",
1446        .help       = "reset the access control list",
1447        .mhandler.cmd = do_acl_reset,
1448    },
1449
1450STEXI
1451@item acl_reset @var{aclname}
1452@findex acl_reset
1453Remove all matches from the access control list, and set the default
1454policy back to @code{deny}.
1455ETEXI
1456
1457    {
1458        .name       = "nbd_server_start",
1459        .args_type  = "all:-a,writable:-w,uri:s",
1460        .params     = "nbd_server_start [-a] [-w] host:port",
1461        .help       = "serve block devices on the given host and port",
1462        .mhandler.cmd = hmp_nbd_server_start,
1463    },
1464STEXI
1465@item nbd_server_start @var{host}:@var{port}
1466@findex nbd_server_start
1467Start an NBD server on the given host and/or port.  If the @option{-a}
1468option is included, all of the virtual machine's block devices that
1469have an inserted media on them are automatically exported; in this case,
1470the @option{-w} option makes the devices writable too.
1471ETEXI
1472
1473    {
1474        .name       = "nbd_server_add",
1475        .args_type  = "writable:-w,device:B",
1476        .params     = "nbd_server_add [-w] device",
1477        .help       = "export a block device via NBD",
1478        .mhandler.cmd = hmp_nbd_server_add,
1479    },
1480STEXI
1481@item nbd_server_add @var{device}
1482@findex nbd_server_add
1483Export a block device through QEMU's NBD server, which must be started
1484beforehand with @command{nbd_server_start}.  The @option{-w} option makes the
1485exported device writable too.
1486ETEXI
1487
1488    {
1489        .name       = "nbd_server_stop",
1490        .args_type  = "",
1491        .params     = "nbd_server_stop",
1492        .help       = "stop serving block devices using the NBD protocol",
1493        .mhandler.cmd = hmp_nbd_server_stop,
1494    },
1495STEXI
1496@item nbd_server_stop
1497@findex nbd_server_stop
1498Stop the QEMU embedded NBD server.
1499ETEXI
1500
1501
1502#if defined(TARGET_I386)
1503
1504    {
1505        .name       = "mce",
1506        .args_type  = "broadcast:-b,cpu_index:i,bank:i,status:l,mcg_status:l,addr:l,misc:l",
1507        .params     = "[-b] cpu bank status mcgstatus addr misc",
1508        .help       = "inject a MCE on the given CPU [and broadcast to other CPUs with -b option]",
1509        .mhandler.cmd = do_inject_mce,
1510    },
1511
1512#endif
1513STEXI
1514@item mce @var{cpu} @var{bank} @var{status} @var{mcgstatus} @var{addr} @var{misc}
1515@findex mce (x86)
1516Inject an MCE on the given CPU (x86 only).
1517ETEXI
1518
1519    {
1520        .name       = "getfd",
1521        .args_type  = "fdname:s",
1522        .params     = "getfd name",
1523        .help       = "receive a file descriptor via SCM rights and assign it a name",
1524        .mhandler.cmd = hmp_getfd,
1525    },
1526
1527STEXI
1528@item getfd @var{fdname}
1529@findex getfd
1530If a file descriptor is passed alongside this command using the SCM_RIGHTS
1531mechanism on unix sockets, it is stored using the name @var{fdname} for
1532later use by other monitor commands.
1533ETEXI
1534
1535    {
1536        .name       = "closefd",
1537        .args_type  = "fdname:s",
1538        .params     = "closefd name",
1539        .help       = "close a file descriptor previously passed via SCM rights",
1540        .mhandler.cmd = hmp_closefd,
1541    },
1542
1543STEXI
1544@item closefd @var{fdname}
1545@findex closefd
1546Close the file descriptor previously assigned to @var{fdname} using the
1547@code{getfd} command. This is only needed if the file descriptor was never
1548used by another monitor command.
1549ETEXI
1550
1551    {
1552        .name       = "block_passwd",
1553        .args_type  = "device:B,password:s",
1554        .params     = "block_passwd device password",
1555        .help       = "set the password of encrypted block devices",
1556        .mhandler.cmd = hmp_block_passwd,
1557    },
1558
1559STEXI
1560@item block_set_io_throttle @var{device} @var{bps} @var{bps_rd} @var{bps_wr} @var{iops} @var{iops_rd} @var{iops_wr}
1561@findex block_set_io_throttle
1562Change I/O throttle limits for a block drive to @var{bps} @var{bps_rd} @var{bps_wr} @var{iops} @var{iops_rd} @var{iops_wr}
1563ETEXI
1564
1565    {
1566        .name       = "block_set_io_throttle",
1567        .args_type  = "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l",
1568        .params     = "device bps bps_rd bps_wr iops iops_rd iops_wr",
1569        .help       = "change I/O throttle limits for a block drive",
1570        .mhandler.cmd = hmp_block_set_io_throttle,
1571    },
1572
1573STEXI
1574@item block_passwd @var{device} @var{password}
1575@findex block_passwd
1576Set the encrypted device @var{device} password to @var{password}
1577ETEXI
1578
1579    {
1580        .name       = "set_password",
1581        .args_type  = "protocol:s,password:s,connected:s?",
1582        .params     = "protocol password action-if-connected",
1583        .help       = "set spice/vnc password",
1584        .mhandler.cmd = hmp_set_password,
1585    },
1586
1587STEXI
1588@item set_password [ vnc | spice ] password [ action-if-connected ]
1589@findex set_password
1590
1591Change spice/vnc password.  Use zero to make the password stay valid
1592forever.  @var{action-if-connected} specifies what should happen in
1593case a connection is established: @var{fail} makes the password change
1594fail.  @var{disconnect} changes the password and disconnects the
1595client.  @var{keep} changes the password and keeps the connection up.
1596@var{keep} is the default.
1597ETEXI
1598
1599    {
1600        .name       = "expire_password",
1601        .args_type  = "protocol:s,time:s",
1602        .params     = "protocol time",
1603        .help       = "set spice/vnc password expire-time",
1604        .mhandler.cmd = hmp_expire_password,
1605    },
1606
1607STEXI
1608@item expire_password [ vnc | spice ] expire-time
1609@findex expire_password
1610
1611Specify when a password for spice/vnc becomes
1612invalid. @var{expire-time} accepts:
1613
1614@table @var
1615@item now
1616Invalidate password instantly.
1617
1618@item never
1619Password stays valid forever.
1620
1621@item +nsec
1622Password stays valid for @var{nsec} seconds starting now.
1623
1624@item nsec
1625Password is invalidated at the given time.  @var{nsec} are the seconds
1626passed since 1970, i.e. unix epoch.
1627
1628@end table
1629ETEXI
1630
1631    {
1632        .name       = "chardev-add",
1633        .args_type  = "args:s",
1634        .params     = "args",
1635        .help       = "add chardev",
1636        .mhandler.cmd = hmp_chardev_add,
1637        .command_completion = chardev_add_completion,
1638    },
1639
1640STEXI
1641@item chardev_add args
1642@findex chardev_add
1643
1644chardev_add accepts the same parameters as the -chardev command line switch.
1645
1646ETEXI
1647
1648    {
1649        .name       = "chardev-remove",
1650        .args_type  = "id:s",
1651        .params     = "id",
1652        .help       = "remove chardev",
1653        .mhandler.cmd = hmp_chardev_remove,
1654        .command_completion = chardev_remove_completion,
1655    },
1656
1657STEXI
1658@item chardev_remove id
1659@findex chardev_remove
1660
1661Removes the chardev @var{id}.
1662
1663ETEXI
1664
1665    {
1666        .name       = "qemu-io",
1667        .args_type  = "device:B,command:s",
1668        .params     = "[device] \"[command]\"",
1669        .help       = "run a qemu-io command on a block device",
1670        .mhandler.cmd = hmp_qemu_io,
1671    },
1672
1673STEXI
1674@item qemu-io @var{device} @var{command}
1675@findex qemu-io
1676
1677Executes a qemu-io command on the given block device.
1678
1679ETEXI
1680
1681    {
1682        .name       = "cpu-add",
1683        .args_type  = "id:i",
1684        .params     = "id",
1685        .help       = "add cpu",
1686        .mhandler.cmd  = hmp_cpu_add,
1687    },
1688
1689STEXI
1690@item cpu-add @var{id}
1691Add CPU with id @var{id}
1692ETEXI
1693
1694    {
1695        .name       = "info",
1696        .args_type  = "item:s?",
1697        .params     = "[subcommand]",
1698        .help       = "show various information about the system state",
1699        .mhandler.cmd = do_info_help,
1700        .sub_table = info_cmds,
1701    },
1702
1703STEXI
1704@item info @var{subcommand}
1705@findex info
1706Show various information about the system state.
1707
1708@table @option
1709@item info version
1710show the version of QEMU
1711@item info network
1712show the various VLANs and the associated devices
1713@item info chardev
1714show the character devices
1715@item info block
1716show the block devices
1717@item info blockstats
1718show block device statistics
1719@item info registers
1720show the cpu registers
1721@item info cpus
1722show infos for each CPU
1723@item info history
1724show the command line history
1725@item info irq
1726show the interrupts statistics (if available)
1727@item info pic
1728show i8259 (PIC) state
1729@item info pci
1730show emulated PCI device info
1731@item info tlb
1732show virtual to physical memory mappings (i386, SH4, SPARC, PPC, and Xtensa only)
1733@item info mem
1734show the active virtual memory mappings (i386 only)
1735@item info jit
1736show dynamic compiler info
1737@item info numa
1738show NUMA information
1739@item info kvm
1740show KVM information
1741@item info usb
1742show USB devices plugged on the virtual USB hub
1743@item info usbhost
1744show all USB host devices
1745@item info profile
1746show profiling information
1747@item info capture
1748show information about active capturing
1749@item info snapshots
1750show list of VM snapshots
1751@item info status
1752show the current VM status (running|paused)
1753@item info pcmcia
1754show guest PCMCIA status
1755@item info mice
1756show which guest mouse is receiving events
1757@item info vnc
1758show the vnc server status
1759@item info name
1760show the current VM name
1761@item info uuid
1762show the current VM UUID
1763@item info cpustats
1764show CPU statistics
1765@item info usernet
1766show user network stack connection states
1767@item info migrate
1768show migration status
1769@item info migrate_capabilities
1770show current migration capabilities
1771@item info migrate_cache_size
1772show current migration XBZRLE cache size
1773@item info balloon
1774show balloon information
1775@item info qtree
1776show device tree
1777@item info qdm
1778show qdev device model list
1779@item info roms
1780show roms
1781@item info tpm
1782show the TPM device
1783@end table
1784ETEXI
1785
1786STEXI
1787@item info trace-events
1788show available trace events and their state
1789ETEXI
1790
1791STEXI
1792@end table
1793ETEXI
1794