xref: /openbmc/qemu/hmp-commands.hx (revision 55bbc861)
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        .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        .cmd        = hmp_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        .cmd        = hmp_quit,
51    },
52
53STEXI
54@item q or quit
55@findex quit
56Quit the emulator.
57ETEXI
58
59    {
60        .name       = "block_resize",
61        .args_type  = "device:B,size:o",
62        .params     = "device size",
63        .help       = "resize a block image",
64        .cmd        = hmp_block_resize,
65    },
66
67STEXI
68@item block_resize
69@findex block_resize
70Resize a block image while a guest is running.  Usually requires guest
71action to see the updated size.  Resize to a lower size is supported,
72but should be used with extreme caution.  Note that this command only
73resizes image files, it can not resize block devices like LVM volumes.
74ETEXI
75
76    {
77        .name       = "block_stream",
78        .args_type  = "device:B,speed:o?,base:s?",
79        .params     = "device [speed [base]]",
80        .help       = "copy data from a backing file into a block device",
81        .cmd        = hmp_block_stream,
82    },
83
84STEXI
85@item block_stream
86@findex block_stream
87Copy data from a backing file into a block device.
88ETEXI
89
90    {
91        .name       = "block_job_set_speed",
92        .args_type  = "device:B,speed:o",
93        .params     = "device speed",
94        .help       = "set maximum speed for a background block operation",
95        .cmd        = hmp_block_job_set_speed,
96    },
97
98STEXI
99@item block_job_set_speed
100@findex block_job_set_speed
101Set maximum speed for a background block operation.
102ETEXI
103
104    {
105        .name       = "block_job_cancel",
106        .args_type  = "force:-f,device:B",
107        .params     = "[-f] device",
108        .help       = "stop an active background block operation (use -f"
109                      "\n\t\t\t if the operation is currently paused)",
110        .cmd        = hmp_block_job_cancel,
111    },
112
113STEXI
114@item block_job_cancel
115@findex block_job_cancel
116Stop an active background block operation (streaming, mirroring).
117ETEXI
118
119    {
120        .name       = "block_job_complete",
121        .args_type  = "device:B",
122        .params     = "device",
123        .help       = "stop an active background block operation",
124        .cmd        = hmp_block_job_complete,
125    },
126
127STEXI
128@item block_job_complete
129@findex block_job_complete
130Manually trigger completion of an active background block operation.
131For mirroring, this will switch the device to the destination path.
132ETEXI
133
134    {
135        .name       = "block_job_pause",
136        .args_type  = "device:B",
137        .params     = "device",
138        .help       = "pause an active background block operation",
139        .cmd        = hmp_block_job_pause,
140    },
141
142STEXI
143@item block_job_pause
144@findex block_job_pause
145Pause an active block streaming operation.
146ETEXI
147
148    {
149        .name       = "block_job_resume",
150        .args_type  = "device:B",
151        .params     = "device",
152        .help       = "resume a paused background block operation",
153        .cmd        = hmp_block_job_resume,
154    },
155
156STEXI
157@item block_job_resume
158@findex block_job_resume
159Resume a paused block streaming operation.
160ETEXI
161
162    {
163        .name       = "eject",
164        .args_type  = "force:-f,device:B",
165        .params     = "[-f] device",
166        .help       = "eject a removable medium (use -f to force it)",
167        .cmd        = hmp_eject,
168    },
169
170STEXI
171@item eject [-f] @var{device}
172@findex eject
173Eject a removable medium (use -f to force it).
174ETEXI
175
176    {
177        .name       = "drive_del",
178        .args_type  = "id:B",
179        .params     = "device",
180        .help       = "remove host block device",
181        .cmd        = hmp_drive_del,
182    },
183
184STEXI
185@item drive_del @var{device}
186@findex drive_del
187Remove host block device.  The result is that guest generated IO is no longer
188submitted against the host device underlying the disk.  Once a drive has
189been deleted, the QEMU Block layer returns -EIO which results in IO
190errors in the guest for applications that are reading/writing to the device.
191These errors are always reported to the guest, regardless of the drive's error
192actions (drive options rerror, werror).
193ETEXI
194
195    {
196        .name       = "change",
197        .args_type  = "device:B,target:F,arg:s?,read-only-mode:s?",
198        .params     = "device filename [format [read-only-mode]]",
199        .help       = "change a removable medium, optional format",
200        .cmd        = hmp_change,
201    },
202
203STEXI
204@item change @var{device} @var{setting}
205@findex change
206Change the configuration of a device.
207
208@table @option
209@item change @var{diskdevice} @var{filename} [@var{format} [@var{read-only-mode}]]
210Change the medium for a removable disk device to point to @var{filename}. eg
211
212@example
213(qemu) change ide1-cd0 /path/to/some.iso
214@end example
215
216@var{format} is optional.
217
218@var{read-only-mode} may be used to change the read-only status of the device.
219It accepts the following values:
220
221@table @var
222@item retain
223Retains the current status; this is the default.
224
225@item read-only
226Makes the device read-only.
227
228@item read-write
229Makes the device writable.
230@end table
231
232@item change vnc @var{display},@var{options}
233Change the configuration of the VNC server. The valid syntax for @var{display}
234and @var{options} are described at @ref{sec_invocation}. eg
235
236@example
237(qemu) change vnc localhost:1
238@end example
239
240@item change vnc password [@var{password}]
241
242Change the password associated with the VNC server. If the new password is not
243supplied, the monitor will prompt for it to be entered. VNC passwords are only
244significant up to 8 letters. eg
245
246@example
247(qemu) change vnc password
248Password: ********
249@end example
250
251@end table
252ETEXI
253
254    {
255        .name       = "screendump",
256        .args_type  = "filename:F",
257        .params     = "filename",
258        .help       = "save screen into PPM image 'filename'",
259        .cmd        = hmp_screendump,
260    },
261
262STEXI
263@item screendump @var{filename}
264@findex screendump
265Save screen into PPM image @var{filename}.
266ETEXI
267
268    {
269        .name       = "logfile",
270        .args_type  = "filename:F",
271        .params     = "filename",
272        .help       = "output logs to 'filename'",
273        .cmd        = hmp_logfile,
274    },
275
276STEXI
277@item logfile @var{filename}
278@findex logfile
279Output logs to @var{filename}.
280ETEXI
281
282    {
283        .name       = "trace-event",
284        .args_type  = "name:s,option:b,vcpu:i?",
285        .params     = "name on|off [vcpu]",
286        .help       = "changes status of a specific trace event "
287                      "(vcpu: vCPU to set, default is all)",
288        .cmd = hmp_trace_event,
289        .command_completion = trace_event_completion,
290    },
291
292STEXI
293@item trace-event
294@findex trace-event
295changes status of a trace event
296ETEXI
297
298#if defined(CONFIG_TRACE_SIMPLE)
299    {
300        .name       = "trace-file",
301        .args_type  = "op:s?,arg:F?",
302        .params     = "on|off|flush|set [arg]",
303        .help       = "open, close, or flush trace file, or set a new file name",
304        .cmd        = hmp_trace_file,
305    },
306
307STEXI
308@item trace-file on|off|flush
309@findex trace-file
310Open, close, or flush the trace file.  If no argument is given, the status of the trace file is displayed.
311ETEXI
312#endif
313
314    {
315        .name       = "log",
316        .args_type  = "items:s",
317        .params     = "item1[,...]",
318        .help       = "activate logging of the specified items",
319        .cmd        = hmp_log,
320    },
321
322STEXI
323@item log @var{item1}[,...]
324@findex log
325Activate logging of the specified items.
326ETEXI
327
328    {
329        .name       = "savevm",
330        .args_type  = "name:s?",
331        .params     = "[tag|id]",
332        .help       = "save a VM snapshot. If no tag or id are provided, a new snapshot is created",
333        .cmd        = hmp_savevm,
334    },
335
336STEXI
337@item savevm [@var{tag}|@var{id}]
338@findex savevm
339Create a snapshot of the whole virtual machine. If @var{tag} is
340provided, it is used as human readable identifier. If there is already
341a snapshot with the same tag or ID, it is replaced. More info at
342@ref{vm_snapshots}.
343ETEXI
344
345    {
346        .name       = "loadvm",
347        .args_type  = "name:s",
348        .params     = "tag|id",
349        .help       = "restore a VM snapshot from its tag or id",
350        .cmd        = hmp_loadvm,
351        .command_completion = loadvm_completion,
352    },
353
354STEXI
355@item loadvm @var{tag}|@var{id}
356@findex loadvm
357Set the whole virtual machine to the snapshot identified by the tag
358@var{tag} or the unique snapshot ID @var{id}.
359ETEXI
360
361    {
362        .name       = "delvm",
363        .args_type  = "name:s",
364        .params     = "tag|id",
365        .help       = "delete a VM snapshot from its tag or id",
366        .cmd        = hmp_delvm,
367        .command_completion = delvm_completion,
368    },
369
370STEXI
371@item delvm @var{tag}|@var{id}
372@findex delvm
373Delete the snapshot identified by @var{tag} or @var{id}.
374ETEXI
375
376    {
377        .name       = "singlestep",
378        .args_type  = "option:s?",
379        .params     = "[on|off]",
380        .help       = "run emulation in singlestep mode or switch to normal mode",
381        .cmd        = hmp_singlestep,
382    },
383
384STEXI
385@item singlestep [off]
386@findex singlestep
387Run the emulation in single step mode.
388If called with option off, the emulation returns to normal mode.
389ETEXI
390
391    {
392        .name       = "stop",
393        .args_type  = "",
394        .params     = "",
395        .help       = "stop emulation",
396        .cmd        = hmp_stop,
397    },
398
399STEXI
400@item stop
401@findex stop
402Stop emulation.
403ETEXI
404
405    {
406        .name       = "c|cont",
407        .args_type  = "",
408        .params     = "",
409        .help       = "resume emulation",
410        .cmd        = hmp_cont,
411    },
412
413STEXI
414@item c or cont
415@findex cont
416Resume emulation.
417ETEXI
418
419    {
420        .name       = "system_wakeup",
421        .args_type  = "",
422        .params     = "",
423        .help       = "wakeup guest from suspend",
424        .cmd        = hmp_system_wakeup,
425    },
426
427STEXI
428@item system_wakeup
429@findex system_wakeup
430Wakeup guest from suspend.
431ETEXI
432
433    {
434        .name       = "gdbserver",
435        .args_type  = "device:s?",
436        .params     = "[device]",
437        .help       = "start gdbserver on given device (default 'tcp::1234'), stop with 'none'",
438        .cmd        = hmp_gdbserver,
439    },
440
441STEXI
442@item gdbserver [@var{port}]
443@findex gdbserver
444Start gdbserver session (default @var{port}=1234)
445ETEXI
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
455STEXI
456@item x/fmt @var{addr}
457@findex x
458Virtual memory dump starting at @var{addr}.
459ETEXI
460
461    {
462        .name       = "xp",
463        .args_type  = "fmt:/,addr:l",
464        .params     = "/fmt addr",
465        .help       = "physical memory dump starting at 'addr'",
466        .cmd        = hmp_physical_memory_dump,
467    },
468
469STEXI
470@item xp /@var{fmt} @var{addr}
471@findex xp
472Physical memory dump starting at @var{addr}.
473
474@var{fmt} is a format which tells the command how to format the
475data. Its syntax is: @option{/@{count@}@{format@}@{size@}}
476
477@table @var
478@item count
479is the number of items to be dumped.
480
481@item format
482can be x (hex), d (signed decimal), u (unsigned decimal), o (octal),
483c (char) or i (asm instruction).
484
485@item size
486can be b (8 bits), h (16 bits), w (32 bits) or g (64 bits). On x86,
487@code{h} or @code{w} can be specified with the @code{i} format to
488respectively select 16 or 32 bit code instruction size.
489
490@end table
491
492Examples:
493@itemize
494@item
495Dump 10 instructions at the current instruction pointer:
496@example
497(qemu) x/10i $eip
4980x90107063:  ret
4990x90107064:  sti
5000x90107065:  lea    0x0(%esi,1),%esi
5010x90107069:  lea    0x0(%edi,1),%edi
5020x90107070:  ret
5030x90107071:  jmp    0x90107080
5040x90107073:  nop
5050x90107074:  nop
5060x90107075:  nop
5070x90107076:  nop
508@end example
509
510@item
511Dump 80 16 bit values at the start of the video memory.
512@smallexample
513(qemu) xp/80hx 0xb8000
5140x000b8000: 0x0b50 0x0b6c 0x0b65 0x0b78 0x0b38 0x0b36 0x0b2f 0x0b42
5150x000b8010: 0x0b6f 0x0b63 0x0b68 0x0b73 0x0b20 0x0b56 0x0b47 0x0b41
5160x000b8020: 0x0b42 0x0b69 0x0b6f 0x0b73 0x0b20 0x0b63 0x0b75 0x0b72
5170x000b8030: 0x0b72 0x0b65 0x0b6e 0x0b74 0x0b2d 0x0b63 0x0b76 0x0b73
5180x000b8040: 0x0b20 0x0b30 0x0b35 0x0b20 0x0b4e 0x0b6f 0x0b76 0x0b20
5190x000b8050: 0x0b32 0x0b30 0x0b30 0x0b33 0x0720 0x0720 0x0720 0x0720
5200x000b8060: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720
5210x000b8070: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720
5220x000b8080: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720
5230x000b8090: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720
524@end smallexample
525@end itemize
526ETEXI
527
528    {
529        .name       = "gpa2hva",
530        .args_type  = "addr:l",
531        .params     = "addr",
532        .help       = "print the host virtual address corresponding to a guest physical address",
533        .cmd        = hmp_gpa2hva,
534    },
535
536STEXI
537@item gpa2hva @var{addr}
538@findex gpa2hva
539Print the host virtual address at which the guest's physical address @var{addr}
540is mapped.
541ETEXI
542
543#ifdef CONFIG_LINUX
544    {
545        .name       = "gpa2hpa",
546        .args_type  = "addr:l",
547        .params     = "addr",
548        .help       = "print the host physical address corresponding to a guest physical address",
549        .cmd        = hmp_gpa2hpa,
550    },
551#endif
552
553STEXI
554@item gpa2hpa @var{addr}
555@findex gpa2hpa
556Print the host physical address at which the guest's physical address @var{addr}
557is mapped.
558ETEXI
559
560    {
561        .name       = "p|print",
562        .args_type  = "fmt:/,val:l",
563        .params     = "/fmt expr",
564        .help       = "print expression value (use $reg for CPU register access)",
565        .cmd        = do_print,
566    },
567
568STEXI
569@item p or print/@var{fmt} @var{expr}
570@findex print
571Print expression value. Only the @var{format} part of @var{fmt} is
572used.
573ETEXI
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
583STEXI
584@item i/@var{fmt} @var{addr} [.@var{index}]
585@findex i
586Read I/O port.
587ETEXI
588
589    {
590        .name       = "o",
591        .args_type  = "fmt:/,addr:i,val:i",
592        .params     = "/fmt addr value",
593        .help       = "I/O port write",
594        .cmd        = hmp_ioport_write,
595    },
596
597STEXI
598@item o/@var{fmt} @var{addr} @var{val}
599@findex o
600Write to I/O port.
601ETEXI
602
603    {
604        .name       = "sendkey",
605        .args_type  = "keys:s,hold-time:i?",
606        .params     = "keys [hold_ms]",
607        .help       = "send keys to the VM (e.g. 'sendkey ctrl-alt-f1', default hold time=100 ms)",
608        .cmd        = hmp_sendkey,
609        .command_completion = sendkey_completion,
610    },
611
612STEXI
613@item sendkey @var{keys}
614@findex sendkey
615Send @var{keys} to the guest. @var{keys} could be the name of the
616key or the raw value in hexadecimal format. Use @code{-} to press
617several keys simultaneously. Example:
618@example
619sendkey ctrl-alt-f1
620@end example
621
622This command is useful to send keys that your graphical user interface
623intercepts at low level, such as @code{ctrl-alt-f1} in X Window.
624ETEXI
625
626    {
627        .name       = "system_reset",
628        .args_type  = "",
629        .params     = "",
630        .help       = "reset the system",
631        .cmd        = hmp_system_reset,
632    },
633
634STEXI
635@item system_reset
636@findex system_reset
637Reset the system.
638ETEXI
639
640    {
641        .name       = "system_powerdown",
642        .args_type  = "",
643        .params     = "",
644        .help       = "send system power down event",
645        .cmd        = hmp_system_powerdown,
646    },
647
648STEXI
649@item system_powerdown
650@findex system_powerdown
651Power down the system (if supported).
652ETEXI
653
654    {
655        .name       = "sum",
656        .args_type  = "start:i,size:i",
657        .params     = "addr size",
658        .help       = "compute the checksum of a memory region",
659        .cmd        = hmp_sum,
660    },
661
662STEXI
663@item sum @var{addr} @var{size}
664@findex sum
665Compute the checksum of a memory region.
666ETEXI
667
668    {
669        .name       = "device_add",
670        .args_type  = "device:O",
671        .params     = "driver[,prop=value][,...]",
672        .help       = "add device, like -device on the command line",
673        .cmd        = hmp_device_add,
674        .command_completion = device_add_completion,
675    },
676
677STEXI
678@item device_add @var{config}
679@findex device_add
680Add device.
681ETEXI
682
683    {
684        .name       = "device_del",
685        .args_type  = "id:s",
686        .params     = "device",
687        .help       = "remove device",
688        .cmd        = hmp_device_del,
689        .command_completion = device_del_completion,
690    },
691
692STEXI
693@item device_del @var{id}
694@findex device_del
695Remove device @var{id}. @var{id} may be a short ID
696or a QOM object path.
697ETEXI
698
699    {
700        .name       = "cpu",
701        .args_type  = "index:i",
702        .params     = "index",
703        .help       = "set the default CPU",
704        .cmd        = hmp_cpu,
705    },
706
707STEXI
708@item cpu @var{index}
709@findex cpu
710Set the default CPU.
711ETEXI
712
713    {
714        .name       = "mouse_move",
715        .args_type  = "dx_str:s,dy_str:s,dz_str:s?",
716        .params     = "dx dy [dz]",
717        .help       = "send mouse move events",
718        .cmd        = hmp_mouse_move,
719    },
720
721STEXI
722@item mouse_move @var{dx} @var{dy} [@var{dz}]
723@findex mouse_move
724Move the active mouse to the specified coordinates @var{dx} @var{dy}
725with optional scroll axis @var{dz}.
726ETEXI
727
728    {
729        .name       = "mouse_button",
730        .args_type  = "button_state:i",
731        .params     = "state",
732        .help       = "change mouse button state (1=L, 2=M, 4=R)",
733        .cmd        = hmp_mouse_button,
734    },
735
736STEXI
737@item mouse_button @var{val}
738@findex mouse_button
739Change the active mouse button state @var{val} (1=L, 2=M, 4=R).
740ETEXI
741
742    {
743        .name       = "mouse_set",
744        .args_type  = "index:i",
745        .params     = "index",
746        .help       = "set which mouse device receives events",
747        .cmd        = hmp_mouse_set,
748    },
749
750STEXI
751@item mouse_set @var{index}
752@findex mouse_set
753Set which mouse device receives events at given @var{index}, index
754can be obtained with
755@example
756info mice
757@end example
758ETEXI
759
760    {
761        .name       = "wavcapture",
762        .args_type  = "path:F,freq:i?,bits:i?,nchannels:i?",
763        .params     = "path [frequency [bits [channels]]]",
764        .help       = "capture audio to a wave file (default frequency=44100 bits=16 channels=2)",
765        .cmd        = hmp_wavcapture,
766    },
767STEXI
768@item wavcapture @var{filename} [@var{frequency} [@var{bits} [@var{channels}]]]
769@findex wavcapture
770Capture audio into @var{filename}. Using sample rate @var{frequency}
771bits per sample @var{bits} and number of channels @var{channels}.
772
773Defaults:
774@itemize @minus
775@item Sample rate = 44100 Hz - CD quality
776@item Bits = 16
777@item Number of channels = 2 - Stereo
778@end itemize
779ETEXI
780
781    {
782        .name       = "stopcapture",
783        .args_type  = "n:i",
784        .params     = "capture index",
785        .help       = "stop capture",
786        .cmd        = hmp_stopcapture,
787    },
788STEXI
789@item stopcapture @var{index}
790@findex stopcapture
791Stop capture with a given @var{index}, index can be obtained with
792@example
793info capture
794@end example
795ETEXI
796
797    {
798        .name       = "memsave",
799        .args_type  = "val:l,size:i,filename:s",
800        .params     = "addr size file",
801        .help       = "save to disk virtual memory dump starting at 'addr' of size 'size'",
802        .cmd        = hmp_memsave,
803    },
804
805STEXI
806@item memsave @var{addr} @var{size} @var{file}
807@findex memsave
808save to disk virtual memory dump starting at @var{addr} of size @var{size}.
809ETEXI
810
811    {
812        .name       = "pmemsave",
813        .args_type  = "val:l,size:i,filename:s",
814        .params     = "addr size file",
815        .help       = "save to disk physical memory dump starting at 'addr' of size 'size'",
816        .cmd        = hmp_pmemsave,
817    },
818
819STEXI
820@item pmemsave @var{addr} @var{size} @var{file}
821@findex pmemsave
822save to disk physical memory dump starting at @var{addr} of size @var{size}.
823ETEXI
824
825    {
826        .name       = "boot_set",
827        .args_type  = "bootdevice:s",
828        .params     = "bootdevice",
829        .help       = "define new values for the boot device list",
830        .cmd        = hmp_boot_set,
831    },
832
833STEXI
834@item boot_set @var{bootdevicelist}
835@findex boot_set
836Define new values for the boot device list. Those values will override
837the values specified on the command line through the @code{-boot} option.
838
839The values that can be specified here depend on the machine type, but are
840the same that can be specified in the @code{-boot} command line option.
841ETEXI
842
843    {
844        .name       = "nmi",
845        .args_type  = "",
846        .params     = "",
847        .help       = "inject an NMI",
848        .cmd        = hmp_nmi,
849    },
850STEXI
851@item nmi @var{cpu}
852@findex nmi
853Inject an NMI on the default CPU (x86/s390) or all CPUs (ppc64).
854
855ETEXI
856
857    {
858        .name       = "ringbuf_write",
859        .args_type  = "device:s,data:s",
860        .params     = "device data",
861        .help       = "Write to a ring buffer character device",
862        .cmd        = hmp_ringbuf_write,
863        .command_completion = ringbuf_write_completion,
864    },
865
866STEXI
867@item ringbuf_write @var{device} @var{data}
868@findex ringbuf_write
869Write @var{data} to ring buffer character device @var{device}.
870@var{data} must be a UTF-8 string.
871
872ETEXI
873
874    {
875        .name       = "ringbuf_read",
876        .args_type  = "device:s,size:i",
877        .params     = "device size",
878        .help       = "Read from a ring buffer character device",
879        .cmd        = hmp_ringbuf_read,
880        .command_completion = ringbuf_write_completion,
881    },
882
883STEXI
884@item ringbuf_read @var{device}
885@findex ringbuf_read
886Read and print up to @var{size} bytes from ring buffer character
887device @var{device}.
888Certain non-printable characters are printed \uXXXX, where XXXX is the
889character code in hexadecimal.  Character \ is printed \\.
890Bug: can screw up when the buffer contains invalid UTF-8 sequences,
891NUL characters, after the ring buffer lost data, and when reading
892stops because the size limit is reached.
893
894ETEXI
895
896    {
897        .name       = "migrate",
898        .args_type  = "detach:-d,blk:-b,inc:-i,uri:s",
899        .params     = "[-d] [-b] [-i] uri",
900        .help       = "migrate to URI (using -d to not wait for completion)"
901		      "\n\t\t\t -b for migration without shared storage with"
902		      " full copy of disk\n\t\t\t -i for migration without "
903		      "shared storage with incremental copy of disk "
904		      "(base image shared between src and destination)",
905        .cmd        = hmp_migrate,
906    },
907
908
909STEXI
910@item migrate [-d] [-b] [-i] @var{uri}
911@findex migrate
912Migrate to @var{uri} (using -d to not wait for completion).
913	-b for migration with full copy of disk
914	-i for migration with incremental copy of disk (base image is shared)
915ETEXI
916
917    {
918        .name       = "migrate_cancel",
919        .args_type  = "",
920        .params     = "",
921        .help       = "cancel the current VM migration",
922        .cmd        = hmp_migrate_cancel,
923    },
924
925STEXI
926@item migrate_cancel
927@findex migrate_cancel
928Cancel the current VM migration.
929ETEXI
930
931    {
932        .name       = "migrate_continue",
933        .args_type  = "state:s",
934        .params     = "state",
935        .help       = "Continue migration from the given paused state",
936        .cmd        = hmp_migrate_continue,
937    },
938STEXI
939@item migrate_continue @var{state}
940@findex migrate_continue
941Continue migration from the paused state @var{state}
942ETEXI
943
944    {
945        .name       = "migrate_incoming",
946        .args_type  = "uri:s",
947        .params     = "uri",
948        .help       = "Continue an incoming migration from an -incoming defer",
949        .cmd        = hmp_migrate_incoming,
950    },
951
952STEXI
953@item migrate_incoming @var{uri}
954@findex migrate_incoming
955Continue an incoming migration using the @var{uri} (that has the same syntax
956as the -incoming option).
957
958ETEXI
959
960    {
961        .name       = "migrate_set_cache_size",
962        .args_type  = "value:o",
963        .params     = "value",
964        .help       = "set cache size (in bytes) for XBZRLE migrations,"
965                      "the cache size will be rounded down to the nearest "
966                      "power of 2.\n"
967                      "The cache size affects the number of cache misses."
968                      "In case of a high cache miss ratio you need to increase"
969                      " the cache size",
970        .cmd        = hmp_migrate_set_cache_size,
971    },
972
973STEXI
974@item migrate_set_cache_size @var{value}
975@findex migrate_set_cache_size
976Set cache size to @var{value} (in bytes) for xbzrle migrations.
977ETEXI
978
979    {
980        .name       = "migrate_set_speed",
981        .args_type  = "value:o",
982        .params     = "value",
983        .help       = "set maximum speed (in bytes) for migrations. "
984	"Defaults to MB if no size suffix is specified, ie. B/K/M/G/T",
985        .cmd        = hmp_migrate_set_speed,
986    },
987
988STEXI
989@item migrate_set_speed @var{value}
990@findex migrate_set_speed
991Set maximum speed to @var{value} (in bytes) for migrations.
992ETEXI
993
994    {
995        .name       = "migrate_set_downtime",
996        .args_type  = "value:T",
997        .params     = "value",
998        .help       = "set maximum tolerated downtime (in seconds) for migrations",
999        .cmd        = hmp_migrate_set_downtime,
1000    },
1001
1002STEXI
1003@item migrate_set_downtime @var{second}
1004@findex migrate_set_downtime
1005Set maximum tolerated downtime (in seconds) for migration.
1006ETEXI
1007
1008    {
1009        .name       = "migrate_set_capability",
1010        .args_type  = "capability:s,state:b",
1011        .params     = "capability state",
1012        .help       = "Enable/Disable the usage of a capability for migration",
1013        .cmd        = hmp_migrate_set_capability,
1014        .command_completion = migrate_set_capability_completion,
1015    },
1016
1017STEXI
1018@item migrate_set_capability @var{capability} @var{state}
1019@findex migrate_set_capability
1020Enable/Disable the usage of a capability @var{capability} for migration.
1021ETEXI
1022
1023    {
1024        .name       = "migrate_set_parameter",
1025        .args_type  = "parameter:s,value:s",
1026        .params     = "parameter value",
1027        .help       = "Set the parameter for migration",
1028        .cmd        = hmp_migrate_set_parameter,
1029        .command_completion = migrate_set_parameter_completion,
1030    },
1031
1032STEXI
1033@item migrate_set_parameter @var{parameter} @var{value}
1034@findex migrate_set_parameter
1035Set the parameter @var{parameter} for migration.
1036ETEXI
1037
1038    {
1039        .name       = "migrate_start_postcopy",
1040        .args_type  = "",
1041        .params     = "",
1042        .help       = "Followup to a migration command to switch the migration"
1043                      " to postcopy mode. The postcopy-ram capability must "
1044                      "be set before the original migration command.",
1045        .cmd        = hmp_migrate_start_postcopy,
1046    },
1047
1048STEXI
1049@item migrate_start_postcopy
1050@findex migrate_start_postcopy
1051Switch in-progress migration to postcopy mode. Ignored after the end of
1052migration (or once already in postcopy).
1053ETEXI
1054
1055    {
1056        .name       = "x_colo_lost_heartbeat",
1057        .args_type  = "",
1058        .params     = "",
1059        .help       = "Tell COLO that heartbeat is lost,\n\t\t\t"
1060                      "a failover or takeover is needed.",
1061        .cmd = hmp_x_colo_lost_heartbeat,
1062    },
1063
1064STEXI
1065@item x_colo_lost_heartbeat
1066@findex x_colo_lost_heartbeat
1067Tell COLO that heartbeat is lost, a failover or takeover is needed.
1068ETEXI
1069
1070    {
1071        .name       = "client_migrate_info",
1072        .args_type  = "protocol:s,hostname:s,port:i?,tls-port:i?,cert-subject:s?",
1073        .params     = "protocol hostname port tls-port cert-subject",
1074        .help       = "set migration information for remote display",
1075        .cmd        = hmp_client_migrate_info,
1076    },
1077
1078STEXI
1079@item client_migrate_info @var{protocol} @var{hostname} @var{port} @var{tls-port} @var{cert-subject}
1080@findex client_migrate_info
1081Set migration information for remote display.  This makes the server
1082ask the client to automatically reconnect using the new parameters
1083once migration finished successfully.  Only implemented for SPICE.
1084ETEXI
1085
1086    {
1087        .name       = "dump-guest-memory",
1088        .args_type  = "paging:-p,detach:-d,zlib:-z,lzo:-l,snappy:-s,filename:F,begin:i?,length:i?",
1089        .params     = "[-p] [-d] [-z|-l|-s] filename [begin length]",
1090        .help       = "dump guest memory into file 'filename'.\n\t\t\t"
1091                      "-p: do paging to get guest's memory mapping.\n\t\t\t"
1092                      "-d: return immediately (do not wait for completion).\n\t\t\t"
1093                      "-z: dump in kdump-compressed format, with zlib compression.\n\t\t\t"
1094                      "-l: dump in kdump-compressed format, with lzo compression.\n\t\t\t"
1095                      "-s: dump in kdump-compressed format, with snappy compression.\n\t\t\t"
1096                      "begin: the starting physical address.\n\t\t\t"
1097                      "length: the memory size, in bytes.",
1098        .cmd        = hmp_dump_guest_memory,
1099    },
1100
1101
1102STEXI
1103@item dump-guest-memory [-p] @var{filename} @var{begin} @var{length}
1104@item dump-guest-memory [-z|-l|-s] @var{filename}
1105@findex dump-guest-memory
1106Dump guest memory to @var{protocol}. The file can be processed with crash or
1107gdb. Without -z|-l|-s, the dump format is ELF.
1108        -p: do paging to get guest's memory mapping.
1109        -z: dump in kdump-compressed format, with zlib compression.
1110        -l: dump in kdump-compressed format, with lzo compression.
1111        -s: dump in kdump-compressed format, with snappy compression.
1112  filename: dump file name.
1113     begin: the starting physical address. It's optional, and should be
1114            specified together with length.
1115    length: the memory size, in bytes. It's optional, and should be specified
1116            together with begin.
1117ETEXI
1118
1119#if defined(TARGET_S390X)
1120    {
1121        .name       = "dump-skeys",
1122        .args_type  = "filename:F",
1123        .params     = "",
1124        .help       = "Save guest storage keys into file 'filename'.\n",
1125        .cmd        = hmp_dump_skeys,
1126    },
1127#endif
1128
1129STEXI
1130@item dump-skeys @var{filename}
1131@findex dump-skeys
1132Save guest storage keys to a file.
1133ETEXI
1134
1135#if defined(TARGET_S390X)
1136    {
1137        .name       = "migration_mode",
1138        .args_type  = "mode:i",
1139        .params     = "mode",
1140        .help       = "Enables or disables migration mode\n",
1141        .cmd        = hmp_migrationmode,
1142    },
1143#endif
1144
1145STEXI
1146@item migration_mode @var{mode}
1147@findex migration_mode
1148Enables or disables migration mode.
1149ETEXI
1150
1151    {
1152        .name       = "snapshot_blkdev",
1153        .args_type  = "reuse:-n,device:B,snapshot-file:s?,format:s?",
1154        .params     = "[-n] device [new-image-file] [format]",
1155        .help       = "initiates a live snapshot\n\t\t\t"
1156                      "of device. If a new image file is specified, the\n\t\t\t"
1157                      "new image file will become the new root image.\n\t\t\t"
1158                      "If format is specified, the snapshot file will\n\t\t\t"
1159                      "be created in that format.\n\t\t\t"
1160                      "The default format is qcow2.  The -n flag requests QEMU\n\t\t\t"
1161                      "to reuse the image found in new-image-file, instead of\n\t\t\t"
1162                      "recreating it from scratch.",
1163        .cmd        = hmp_snapshot_blkdev,
1164    },
1165
1166STEXI
1167@item snapshot_blkdev
1168@findex snapshot_blkdev
1169Snapshot device, using snapshot file as target if provided
1170ETEXI
1171
1172    {
1173        .name       = "snapshot_blkdev_internal",
1174        .args_type  = "device:B,name:s",
1175        .params     = "device name",
1176        .help       = "take an internal snapshot of device.\n\t\t\t"
1177                      "The format of the image used by device must\n\t\t\t"
1178                      "support it, such as qcow2.\n\t\t\t",
1179        .cmd        = hmp_snapshot_blkdev_internal,
1180    },
1181
1182STEXI
1183@item snapshot_blkdev_internal
1184@findex snapshot_blkdev_internal
1185Take an internal snapshot on device if it support
1186ETEXI
1187
1188    {
1189        .name       = "snapshot_delete_blkdev_internal",
1190        .args_type  = "device:B,name:s,id:s?",
1191        .params     = "device name [id]",
1192        .help       = "delete an internal snapshot of device.\n\t\t\t"
1193                      "If id is specified, qemu will try delete\n\t\t\t"
1194                      "the snapshot matching both id and name.\n\t\t\t"
1195                      "The format of the image used by device must\n\t\t\t"
1196                      "support it, such as qcow2.\n\t\t\t",
1197        .cmd        = hmp_snapshot_delete_blkdev_internal,
1198    },
1199
1200STEXI
1201@item snapshot_delete_blkdev_internal
1202@findex snapshot_delete_blkdev_internal
1203Delete an internal snapshot on device if it support
1204ETEXI
1205
1206    {
1207        .name       = "drive_mirror",
1208        .args_type  = "reuse:-n,full:-f,device:B,target:s,format:s?",
1209        .params     = "[-n] [-f] device target [format]",
1210        .help       = "initiates live storage\n\t\t\t"
1211                      "migration for a device. The device's contents are\n\t\t\t"
1212                      "copied to the new image file, including data that\n\t\t\t"
1213                      "is written after the command is started.\n\t\t\t"
1214                      "The -n flag requests QEMU to reuse the image found\n\t\t\t"
1215                      "in new-image-file, instead of recreating it from scratch.\n\t\t\t"
1216                      "The -f flag requests QEMU to copy the whole disk,\n\t\t\t"
1217                      "so that the result does not need a backing file.\n\t\t\t",
1218        .cmd        = hmp_drive_mirror,
1219    },
1220STEXI
1221@item drive_mirror
1222@findex drive_mirror
1223Start mirroring a block device's writes to a new destination,
1224using the specified target.
1225ETEXI
1226
1227    {
1228        .name       = "drive_backup",
1229        .args_type  = "reuse:-n,full:-f,compress:-c,device:B,target:s,format:s?",
1230        .params     = "[-n] [-f] [-c] device target [format]",
1231        .help       = "initiates a point-in-time\n\t\t\t"
1232                      "copy for a device. The device's contents are\n\t\t\t"
1233                      "copied to the new image file, excluding data that\n\t\t\t"
1234                      "is written after the command is started.\n\t\t\t"
1235                      "The -n flag requests QEMU to reuse the image found\n\t\t\t"
1236                      "in new-image-file, instead of recreating it from scratch.\n\t\t\t"
1237                      "The -f flag requests QEMU to copy the whole disk,\n\t\t\t"
1238                      "so that the result does not need a backing file.\n\t\t\t"
1239                      "The -c flag requests QEMU to compress backup data\n\t\t\t"
1240                      "(if the target format supports it).\n\t\t\t",
1241        .cmd        = hmp_drive_backup,
1242    },
1243STEXI
1244@item drive_backup
1245@findex drive_backup
1246Start a point-in-time copy of a block device to a specificed target.
1247ETEXI
1248
1249    {
1250        .name       = "drive_add",
1251        .args_type  = "node:-n,pci_addr:s,opts:s",
1252        .params     = "[-n] [[<domain>:]<bus>:]<slot>\n"
1253                      "[file=file][,if=type][,bus=n]\n"
1254                      "[,unit=m][,media=d][,index=i]\n"
1255                      "[,cyls=c,heads=h,secs=s[,trans=t]]\n"
1256                      "[,snapshot=on|off][,cache=on|off]\n"
1257                      "[,readonly=on|off][,copy-on-read=on|off]",
1258        .help       = "add drive to PCI storage controller",
1259        .cmd        = hmp_drive_add,
1260    },
1261
1262STEXI
1263@item drive_add
1264@findex drive_add
1265Add drive to PCI storage controller.
1266ETEXI
1267
1268    {
1269        .name       = "pcie_aer_inject_error",
1270        .args_type  = "advisory_non_fatal:-a,correctable:-c,"
1271	              "id:s,error_status:s,"
1272	              "header0:i?,header1:i?,header2:i?,header3:i?,"
1273	              "prefix0:i?,prefix1:i?,prefix2:i?,prefix3:i?",
1274        .params     = "[-a] [-c] id "
1275                      "<error_status> [<tlp header> [<tlp header prefix>]]",
1276        .help       = "inject pcie aer error\n\t\t\t"
1277	              " -a for advisory non fatal error\n\t\t\t"
1278	              " -c for correctable error\n\t\t\t"
1279                      "<id> = qdev device id\n\t\t\t"
1280                      "<error_status> = error string or 32bit\n\t\t\t"
1281                      "<tlb header> = 32bit x 4\n\t\t\t"
1282                      "<tlb header prefix> = 32bit x 4",
1283        .cmd        = hmp_pcie_aer_inject_error,
1284    },
1285
1286STEXI
1287@item pcie_aer_inject_error
1288@findex pcie_aer_inject_error
1289Inject PCIe AER error
1290ETEXI
1291
1292    {
1293        .name       = "host_net_add",
1294        .args_type  = "device:s,opts:s?",
1295        .params     = "tap|user|socket|vde|netmap|bridge|vhost-user|dump [options]",
1296        .help       = "add host VLAN client (deprecated, use netdev_add instead)",
1297        .cmd        = hmp_host_net_add,
1298        .command_completion = host_net_add_completion,
1299    },
1300
1301STEXI
1302@item host_net_add
1303@findex host_net_add
1304Add host VLAN client. Deprecated, please use @code{netdev_add} instead.
1305ETEXI
1306
1307    {
1308        .name       = "host_net_remove",
1309        .args_type  = "vlan_id:i,device:s",
1310        .params     = "vlan_id name",
1311        .help       = "remove host VLAN client (deprecated, use netdev_del instead)",
1312        .cmd        = hmp_host_net_remove,
1313        .command_completion = host_net_remove_completion,
1314    },
1315
1316STEXI
1317@item host_net_remove
1318@findex host_net_remove
1319Remove host VLAN client. Deprecated, please use @code{netdev_del} instead.
1320ETEXI
1321
1322    {
1323        .name       = "netdev_add",
1324        .args_type  = "netdev:O",
1325        .params     = "[user|tap|socket|vde|bridge|hubport|netmap|vhost-user],id=str[,prop=value][,...]",
1326        .help       = "add host network device",
1327        .cmd        = hmp_netdev_add,
1328        .command_completion = netdev_add_completion,
1329    },
1330
1331STEXI
1332@item netdev_add
1333@findex netdev_add
1334Add host network device.
1335ETEXI
1336
1337    {
1338        .name       = "netdev_del",
1339        .args_type  = "id:s",
1340        .params     = "id",
1341        .help       = "remove host network device",
1342        .cmd        = hmp_netdev_del,
1343        .command_completion = netdev_del_completion,
1344    },
1345
1346STEXI
1347@item netdev_del
1348@findex netdev_del
1349Remove host network device.
1350ETEXI
1351
1352    {
1353        .name       = "object_add",
1354        .args_type  = "object:O",
1355        .params     = "[qom-type=]type,id=str[,prop=value][,...]",
1356        .help       = "create QOM object",
1357        .cmd        = hmp_object_add,
1358        .command_completion = object_add_completion,
1359    },
1360
1361STEXI
1362@item object_add
1363@findex object_add
1364Create QOM object.
1365ETEXI
1366
1367    {
1368        .name       = "object_del",
1369        .args_type  = "id:s",
1370        .params     = "id",
1371        .help       = "destroy QOM object",
1372        .cmd        = hmp_object_del,
1373        .command_completion = object_del_completion,
1374    },
1375
1376STEXI
1377@item object_del
1378@findex object_del
1379Destroy QOM object.
1380ETEXI
1381
1382#ifdef CONFIG_SLIRP
1383    {
1384        .name       = "hostfwd_add",
1385        .args_type  = "arg1:s,arg2:s?,arg3:s?",
1386        .params     = "[vlan_id name] [tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport",
1387        .help       = "redirect TCP or UDP connections from host to guest (requires -net user)",
1388        .cmd        = hmp_hostfwd_add,
1389    },
1390#endif
1391STEXI
1392@item hostfwd_add
1393@findex hostfwd_add
1394Redirect TCP or UDP connections from host to guest (requires -net user).
1395ETEXI
1396
1397#ifdef CONFIG_SLIRP
1398    {
1399        .name       = "hostfwd_remove",
1400        .args_type  = "arg1:s,arg2:s?,arg3:s?",
1401        .params     = "[vlan_id name] [tcp|udp]:[hostaddr]:hostport",
1402        .help       = "remove host-to-guest TCP or UDP redirection",
1403        .cmd        = hmp_hostfwd_remove,
1404    },
1405
1406#endif
1407STEXI
1408@item hostfwd_remove
1409@findex hostfwd_remove
1410Remove host-to-guest TCP or UDP redirection.
1411ETEXI
1412
1413    {
1414        .name       = "balloon",
1415        .args_type  = "value:M",
1416        .params     = "target",
1417        .help       = "request VM to change its memory allocation (in MB)",
1418        .cmd        = hmp_balloon,
1419    },
1420
1421STEXI
1422@item balloon @var{value}
1423@findex balloon
1424Request VM to change its memory allocation to @var{value} (in MB).
1425ETEXI
1426
1427    {
1428        .name       = "set_link",
1429        .args_type  = "name:s,up:b",
1430        .params     = "name on|off",
1431        .help       = "change the link status of a network adapter",
1432        .cmd        = hmp_set_link,
1433        .command_completion = set_link_completion,
1434    },
1435
1436STEXI
1437@item set_link @var{name} [on|off]
1438@findex set_link
1439Switch link @var{name} on (i.e. up) or off (i.e. down).
1440ETEXI
1441
1442    {
1443        .name       = "watchdog_action",
1444        .args_type  = "action:s",
1445        .params     = "[reset|shutdown|poweroff|pause|debug|none]",
1446        .help       = "change watchdog action",
1447        .cmd        = hmp_watchdog_action,
1448        .command_completion = watchdog_action_completion,
1449    },
1450
1451STEXI
1452@item watchdog_action
1453@findex watchdog_action
1454Change watchdog action.
1455ETEXI
1456
1457    {
1458        .name       = "acl_show",
1459        .args_type  = "aclname:s",
1460        .params     = "aclname",
1461        .help       = "list rules in the access control list",
1462        .cmd        = hmp_acl_show,
1463    },
1464
1465STEXI
1466@item acl_show @var{aclname}
1467@findex acl_show
1468List all the matching rules in the access control list, and the default
1469policy. There are currently two named access control lists,
1470@var{vnc.x509dname} and @var{vnc.username} matching on the x509 client
1471certificate distinguished name, and SASL username respectively.
1472ETEXI
1473
1474    {
1475        .name       = "acl_policy",
1476        .args_type  = "aclname:s,policy:s",
1477        .params     = "aclname allow|deny",
1478        .help       = "set default access control list policy",
1479        .cmd        = hmp_acl_policy,
1480    },
1481
1482STEXI
1483@item acl_policy @var{aclname} @code{allow|deny}
1484@findex acl_policy
1485Set the default access control list policy, used in the event that
1486none of the explicit rules match. The default policy at startup is
1487always @code{deny}.
1488ETEXI
1489
1490    {
1491        .name       = "acl_add",
1492        .args_type  = "aclname:s,match:s,policy:s,index:i?",
1493        .params     = "aclname match allow|deny [index]",
1494        .help       = "add a match rule to the access control list",
1495        .cmd        = hmp_acl_add,
1496    },
1497
1498STEXI
1499@item acl_add @var{aclname} @var{match} @code{allow|deny} [@var{index}]
1500@findex acl_add
1501Add a match rule to the access control list, allowing or denying access.
1502The match will normally be an exact username or x509 distinguished name,
1503but can optionally include wildcard globs. eg @code{*@@EXAMPLE.COM} to
1504allow all users in the @code{EXAMPLE.COM} kerberos realm. The match will
1505normally be appended to the end of the ACL, but can be inserted
1506earlier in the list if the optional @var{index} parameter is supplied.
1507ETEXI
1508
1509    {
1510        .name       = "acl_remove",
1511        .args_type  = "aclname:s,match:s",
1512        .params     = "aclname match",
1513        .help       = "remove a match rule from the access control list",
1514        .cmd        = hmp_acl_remove,
1515    },
1516
1517STEXI
1518@item acl_remove @var{aclname} @var{match}
1519@findex acl_remove
1520Remove the specified match rule from the access control list.
1521ETEXI
1522
1523    {
1524        .name       = "acl_reset",
1525        .args_type  = "aclname:s",
1526        .params     = "aclname",
1527        .help       = "reset the access control list",
1528        .cmd        = hmp_acl_reset,
1529    },
1530
1531STEXI
1532@item acl_reset @var{aclname}
1533@findex acl_reset
1534Remove all matches from the access control list, and set the default
1535policy back to @code{deny}.
1536ETEXI
1537
1538    {
1539        .name       = "nbd_server_start",
1540        .args_type  = "all:-a,writable:-w,uri:s",
1541        .params     = "nbd_server_start [-a] [-w] host:port",
1542        .help       = "serve block devices on the given host and port",
1543        .cmd        = hmp_nbd_server_start,
1544    },
1545STEXI
1546@item nbd_server_start @var{host}:@var{port}
1547@findex nbd_server_start
1548Start an NBD server on the given host and/or port.  If the @option{-a}
1549option is included, all of the virtual machine's block devices that
1550have an inserted media on them are automatically exported; in this case,
1551the @option{-w} option makes the devices writable too.
1552ETEXI
1553
1554    {
1555        .name       = "nbd_server_add",
1556        .args_type  = "writable:-w,device:B",
1557        .params     = "nbd_server_add [-w] device",
1558        .help       = "export a block device via NBD",
1559        .cmd        = hmp_nbd_server_add,
1560    },
1561STEXI
1562@item nbd_server_add @var{device}
1563@findex nbd_server_add
1564Export a block device through QEMU's NBD server, which must be started
1565beforehand with @command{nbd_server_start}.  The @option{-w} option makes the
1566exported device writable too.
1567ETEXI
1568
1569    {
1570        .name       = "nbd_server_stop",
1571        .args_type  = "",
1572        .params     = "nbd_server_stop",
1573        .help       = "stop serving block devices using the NBD protocol",
1574        .cmd        = hmp_nbd_server_stop,
1575    },
1576STEXI
1577@item nbd_server_stop
1578@findex nbd_server_stop
1579Stop the QEMU embedded NBD server.
1580ETEXI
1581
1582
1583#if defined(TARGET_I386)
1584
1585    {
1586        .name       = "mce",
1587        .args_type  = "broadcast:-b,cpu_index:i,bank:i,status:l,mcg_status:l,addr:l,misc:l",
1588        .params     = "[-b] cpu bank status mcgstatus addr misc",
1589        .help       = "inject a MCE on the given CPU [and broadcast to other CPUs with -b option]",
1590        .cmd        = hmp_mce,
1591    },
1592
1593#endif
1594STEXI
1595@item mce @var{cpu} @var{bank} @var{status} @var{mcgstatus} @var{addr} @var{misc}
1596@findex mce (x86)
1597Inject an MCE on the given CPU (x86 only).
1598ETEXI
1599
1600    {
1601        .name       = "getfd",
1602        .args_type  = "fdname:s",
1603        .params     = "getfd name",
1604        .help       = "receive a file descriptor via SCM rights and assign it a name",
1605        .cmd        = hmp_getfd,
1606    },
1607
1608STEXI
1609@item getfd @var{fdname}
1610@findex getfd
1611If a file descriptor is passed alongside this command using the SCM_RIGHTS
1612mechanism on unix sockets, it is stored using the name @var{fdname} for
1613later use by other monitor commands.
1614ETEXI
1615
1616    {
1617        .name       = "closefd",
1618        .args_type  = "fdname:s",
1619        .params     = "closefd name",
1620        .help       = "close a file descriptor previously passed via SCM rights",
1621        .cmd        = hmp_closefd,
1622    },
1623
1624STEXI
1625@item closefd @var{fdname}
1626@findex closefd
1627Close the file descriptor previously assigned to @var{fdname} using the
1628@code{getfd} command. This is only needed if the file descriptor was never
1629used by another monitor command.
1630ETEXI
1631
1632    {
1633        .name       = "block_passwd",
1634        .args_type  = "device:B,password:s",
1635        .params     = "block_passwd device password",
1636        .help       = "set the password of encrypted block devices",
1637        .cmd        = hmp_block_passwd,
1638    },
1639
1640STEXI
1641@item block_passwd @var{device} @var{password}
1642@findex block_passwd
1643Set the encrypted device @var{device} password to @var{password}
1644
1645This command is now obsolete and will always return an error since 2.10
1646ETEXI
1647
1648    {
1649        .name       = "block_set_io_throttle",
1650        .args_type  = "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l",
1651        .params     = "device bps bps_rd bps_wr iops iops_rd iops_wr",
1652        .help       = "change I/O throttle limits for a block drive",
1653        .cmd        = hmp_block_set_io_throttle,
1654    },
1655
1656STEXI
1657@item block_set_io_throttle @var{device} @var{bps} @var{bps_rd} @var{bps_wr} @var{iops} @var{iops_rd} @var{iops_wr}
1658@findex block_set_io_throttle
1659Change 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}
1660ETEXI
1661
1662    {
1663        .name       = "set_password",
1664        .args_type  = "protocol:s,password:s,connected:s?",
1665        .params     = "protocol password action-if-connected",
1666        .help       = "set spice/vnc password",
1667        .cmd        = hmp_set_password,
1668    },
1669
1670STEXI
1671@item set_password [ vnc | spice ] password [ action-if-connected ]
1672@findex set_password
1673Change spice/vnc password.  Use zero to make the password stay valid
1674forever.  @var{action-if-connected} specifies what should happen in
1675case a connection is established: @var{fail} makes the password change
1676fail.  @var{disconnect} changes the password and disconnects the
1677client.  @var{keep} changes the password and keeps the connection up.
1678@var{keep} is the default.
1679ETEXI
1680
1681    {
1682        .name       = "expire_password",
1683        .args_type  = "protocol:s,time:s",
1684        .params     = "protocol time",
1685        .help       = "set spice/vnc password expire-time",
1686        .cmd        = hmp_expire_password,
1687    },
1688
1689STEXI
1690@item expire_password [ vnc | spice ] expire-time
1691@findex expire_password
1692Specify when a password for spice/vnc becomes
1693invalid. @var{expire-time} accepts:
1694
1695@table @var
1696@item now
1697Invalidate password instantly.
1698
1699@item never
1700Password stays valid forever.
1701
1702@item +nsec
1703Password stays valid for @var{nsec} seconds starting now.
1704
1705@item nsec
1706Password is invalidated at the given time.  @var{nsec} are the seconds
1707passed since 1970, i.e. unix epoch.
1708
1709@end table
1710ETEXI
1711
1712    {
1713        .name       = "chardev-add",
1714        .args_type  = "args:s",
1715        .params     = "args",
1716        .help       = "add chardev",
1717        .cmd        = hmp_chardev_add,
1718        .command_completion = chardev_add_completion,
1719    },
1720
1721STEXI
1722@item chardev-add args
1723@findex chardev-add
1724chardev-add accepts the same parameters as the -chardev command line switch.
1725
1726ETEXI
1727
1728    {
1729        .name       = "chardev-change",
1730        .args_type  = "id:s,args:s",
1731        .params     = "id args",
1732        .help       = "change chardev",
1733        .cmd        = hmp_chardev_change,
1734    },
1735
1736STEXI
1737@item chardev-change args
1738@findex chardev-change
1739chardev-change accepts existing chardev @var{id} and then the same arguments
1740as the -chardev command line switch (except for "id").
1741
1742ETEXI
1743
1744    {
1745        .name       = "chardev-remove",
1746        .args_type  = "id:s",
1747        .params     = "id",
1748        .help       = "remove chardev",
1749        .cmd        = hmp_chardev_remove,
1750        .command_completion = chardev_remove_completion,
1751    },
1752
1753STEXI
1754@item chardev-remove id
1755@findex chardev-remove
1756Removes the chardev @var{id}.
1757
1758ETEXI
1759
1760    {
1761        .name       = "chardev-send-break",
1762        .args_type  = "id:s",
1763        .params     = "id",
1764        .help       = "send a break on chardev",
1765        .cmd        = hmp_chardev_send_break,
1766        .command_completion = chardev_remove_completion,
1767    },
1768
1769STEXI
1770@item chardev-send-break id
1771@findex chardev-send-break
1772Send a break on the chardev @var{id}.
1773
1774ETEXI
1775
1776    {
1777        .name       = "qemu-io",
1778        .args_type  = "device:B,command:s",
1779        .params     = "[device] \"[command]\"",
1780        .help       = "run a qemu-io command on a block device",
1781        .cmd        = hmp_qemu_io,
1782    },
1783
1784STEXI
1785@item qemu-io @var{device} @var{command}
1786@findex qemu-io
1787Executes a qemu-io command on the given block device.
1788
1789ETEXI
1790
1791    {
1792        .name       = "cpu-add",
1793        .args_type  = "id:i",
1794        .params     = "id",
1795        .help       = "add cpu",
1796        .cmd        = hmp_cpu_add,
1797    },
1798
1799STEXI
1800@item cpu-add @var{id}
1801@findex cpu-add
1802Add CPU with id @var{id}
1803ETEXI
1804
1805    {
1806        .name       = "qom-list",
1807        .args_type  = "path:s?",
1808        .params     = "path",
1809        .help       = "list QOM properties",
1810        .cmd        = hmp_qom_list,
1811    },
1812
1813STEXI
1814@item qom-list [@var{path}]
1815Print QOM properties of object at location @var{path}
1816ETEXI
1817
1818    {
1819        .name       = "qom-set",
1820        .args_type  = "path:s,property:s,value:s",
1821        .params     = "path property value",
1822        .help       = "set QOM property",
1823        .cmd        = hmp_qom_set,
1824    },
1825
1826STEXI
1827@item qom-set @var{path} @var{property} @var{value}
1828Set QOM property @var{property} of object at location @var{path} to value @var{value}
1829ETEXI
1830
1831    {
1832        .name       = "info",
1833        .args_type  = "item:s?",
1834        .params     = "[subcommand]",
1835        .help       = "show various information about the system state",
1836        .cmd        = hmp_info_help,
1837        .sub_table  = info_cmds,
1838    },
1839
1840STEXI
1841@end table
1842ETEXI
1843