1 HXCOMM See docs
/devel
/docs
.rst
for the format of
this file
.
3 HXCOMM This file defines the contents of an array of HMPCommand structs
4 HXCOMM which specify the name
, behaviour and help text
for HMP commands
.
5 HXCOMM Text between SRST and ERST is rST format documentation
.
6 HXCOMM HXCOMM can be used
for comments
, discarded from both rST and C
.
11 .args_type
= "name:S?",
13 .help
= "show the help",
19 ``help`` or ``?``
[*cmd
*]
20 Show the help
for all commands or just
for command
*cmd
*.
25 .args_type
= "device:B",
26 .params
= "device|all",
27 .help
= "commit changes to the disk images (if -snapshot is used) or backing files",
33 Commit changes to the disk
images (if -snapshot is used
) or backing files
.
34 If the backing file is smaller than the snapshot
, then the backing file
35 will be resized to be the same size as the snapshot
. If the snapshot is
36 smaller than the backing file
, the backing file will not be truncated
.
37 If you want the backing file to match the size of the smaller snapshot
,
38 you can safely truncate it yourself once the commit operation successfully
46 .help
= "quit the emulator",
57 .name
= "exit_preconfig",
60 .help
= "exit the preconfig state",
61 .cmd
= hmp_exit_preconfig
,
67 This command makes QEMU exit the preconfig state and proceed with
68 VM initialization
using configuration data provided on the command line
69 and via the QMP monitor during the preconfig state
. The command is only
70 available during the preconfig
state (i
.e
. when the
--preconfig command
71 line option was
in use
).
75 .name
= "block_resize",
76 .args_type
= "device:B,size:o",
77 .params
= "device size",
78 .help
= "resize a block image",
79 .cmd
= hmp_block_resize
,
86 Resize a block image
while a guest is running
. Usually requires guest
87 action to see the updated size
. Resize to a lower size is supported
,
88 but should be used with extreme caution
. Note that
this command only
89 resizes image files
, it can not resize block devices like LVM volumes
.
93 .name
= "block_stream",
94 .args_type
= "device:B,speed:o?,base:s?",
95 .params
= "device [speed [base]]",
96 .help
= "copy data from a backing file into a block device",
97 .cmd
= hmp_block_stream
,
103 Copy data from a backing file into a block device
.
107 .name
= "block_job_set_speed",
108 .args_type
= "device:B,speed:o",
109 .params
= "device speed",
110 .help
= "set maximum speed for a background block operation",
111 .cmd
= hmp_block_job_set_speed
,
116 ``block_job_set_speed``
117 Set maximum speed
for a background block operation
.
121 .name
= "block_job_cancel",
122 .args_type
= "force:-f,device:B",
123 .params
= "[-f] device",
124 .help
= "stop an active background block operation (use -f"
125 "\n\t\t\t if you want to abort the operation immediately"
126 "\n\t\t\t instead of keep running until data is in sync)",
127 .cmd
= hmp_block_job_cancel
,
133 Stop an active background block
operation (streaming
, mirroring
).
137 .name
= "block_job_complete",
138 .args_type
= "device:B",
140 .help
= "stop an active background block operation",
141 .cmd
= hmp_block_job_complete
,
146 ``block_job_complete``
147 Manually trigger completion of an active background block operation
.
148 For mirroring
, this will
switch the device to the destination path
.
152 .name
= "block_job_pause",
153 .args_type
= "device:B",
155 .help
= "pause an active background block operation",
156 .cmd
= hmp_block_job_pause
,
162 Pause an active block streaming operation
.
166 .name
= "block_job_resume",
167 .args_type
= "device:B",
169 .help
= "resume a paused background block operation",
170 .cmd
= hmp_block_job_resume
,
176 Resume a paused block streaming operation
.
181 .args_type
= "force:-f,device:B",
182 .params
= "[-f] device",
183 .help
= "eject a removable medium (use -f to force it)",
188 ``eject
[-f
]``
*device
*
189 Eject a removable
medium (use
-f to force it
).
196 .help
= "remove host block device",
197 .cmd
= hmp_drive_del
,
201 ``drive_del``
*device
*
202 Remove host block device
. The result is that guest generated IO is no longer
203 submitted against the host device underlying the disk
. Once a drive has
204 been deleted
, the QEMU Block layer returns
-EIO which results
in IO
205 errors
in the guest
for applications that are reading
/writing to the device
.
206 These errors are always reported to the guest
, regardless of the drive
's error
207 actions (drive options rerror, werror).
212 .args_type = "device:B,force:-f,target:F,arg:s?,read-only-mode:s?",
213 .params = "device [-f] filename [format [read-only-mode]]",
214 .help = "change a removable medium, optional format, use -f to force the operation",
219 ``change`` *device* *setting*
220 Change the configuration of a device.
222 ``change`` *diskdevice* [-f] *filename* [*format* [*read-only-mode*]]
223 Change the medium for a removable disk device to point to *filename*. eg::
225 (qemu) change ide1-cd0 /path/to/some.iso
228 forces the operation even if the guest has locked the tray.
230 *format* is optional.
232 *read-only-mode* may be used to change the read-only status of the device.
233 It accepts the following values:
236 Retains the current status; this is the default.
239 Makes the device read-only.
242 Makes the device writable.
244 ``change vnc password`` [*password*]
246 Change the password associated with the VNC server. If the new password
247 is not supplied, the monitor will prompt for it to be entered. VNC
248 passwords are only significant up to 8 letters. eg::
250 (qemu) change vnc password
257 .name = "screendump",
258 .args_type = "filename:F,format:-fs,device:s?,head:i?",
259 .params = "filename [-f format] [device [head]]",
260 .help = "save screen from head 'head
' of display device 'device
'"
261 "in specified format 'format
' as image 'filename
'."
262 "Currently only 'png
' and 'ppm
' formats are supported.",
263 .cmd = hmp_screendump,
268 ``screendump`` *filename*
269 Save screen into PPM image *filename*.
275 .args_type = "filename:F",
276 .params = "filename",
277 .help = "output logs to 'filename
'",
282 ``logfile`` *filename*
283 Output logs to *filename*.
287 .name = "trace-event",
288 .args_type = "name:s,option:b,vcpu:i?",
289 .params = "name on|off [vcpu]",
290 .help = "changes status of a specific trace event "
291 "(vcpu: vCPU to set, default is all)",
292 .cmd = hmp_trace_event,
293 .command_completion = trace_event_completion,
298 changes status of a trace event
301 #if defined(CONFIG_TRACE_SIMPLE)
303 .name = "trace-file",
304 .args_type = "op:s?,arg:F?",
305 .params = "on|off|flush|set [arg]",
306 .help = "open, close, or flush trace file, or set a new file name",
307 .cmd = hmp_trace_file,
311 ``trace-file on|off|flush``
312 Open, close, or flush the trace file. If no argument is given, the
313 status of the trace file is displayed.
319 .args_type = "items:s",
320 .params = "item1[,...]",
321 .help = "activate logging of the specified items",
326 ``log`` *item1*\ [,...]
327 Activate logging of the specified items.
332 .args_type = "name:s?",
334 .help = "save a VM snapshot. If no tag is provided, a new snapshot is created",
340 Create a snapshot of the whole virtual machine. If *tag* is
341 provided, it is used as human readable identifier. If there is already
342 a snapshot with the same tag, it is replaced. More info at
343 :ref:`vm_005fsnapshots`.
345 Since 4.0, savevm stopped allowing the snapshot id to be set, accepting
346 only *tag* as parameter.
351 .args_type = "name:s",
353 .help = "restore a VM snapshot from its tag",
355 .command_completion = loadvm_completion,
360 Set the whole virtual machine to the snapshot identified by the tag
363 Since 4.0, loadvm stopped accepting snapshot id as parameter.
368 .args_type = "name:s",
370 .help = "delete a VM snapshot from its tag",
372 .command_completion = delvm_completion,
377 Delete the snapshot identified by *tag*.
379 Since 4.0, delvm stopped deleting snapshots by snapshot id, accepting
380 only *tag* as parameter.
384 .name = "one-insn-per-tb",
385 .args_type = "option:s?",
386 .params = "[on|off]",
387 .help = "run emulation with one guest instruction per translation block",
388 .cmd = hmp_one_insn_per_tb,
392 ``one-insn-per-tb [off]``
393 Run the emulation with one guest instruction per translation block.
394 This slows down emulation a lot, but can be useful in some situations,
395 such as when trying to analyse the logs produced by the ``-d`` option.
396 This only has an effect when using TCG, not with KVM or other accelerators.
398 If called with option off, the emulation returns to normal mode.
405 .help = "stop emulation",
418 .help = "resume emulation",
428 .name = "system_wakeup",
431 .help = "wakeup guest from suspend",
432 .cmd = hmp_system_wakeup,
437 Wakeup guest from suspend.
442 .args_type = "device:s?",
443 .params = "[device]",
444 .help = "start gdbserver on given device (default 'tcp
::1234'), stop with 'none
'",
445 .cmd = hmp_gdbserver,
449 ``gdbserver`` [*port*]
450 Start gdbserver session (default *port*\=1234)
455 .args_type = "fmt:/,addr:l",
456 .params = "/fmt addr",
457 .help = "virtual memory dump starting at 'addr
'",
458 .cmd = hmp_memory_dump,
463 Virtual memory dump starting at *addr*.
468 .args_type = "fmt:/,addr:l",
469 .params = "/fmt addr",
470 .help = "physical memory dump starting at 'addr
'",
471 .cmd = hmp_physical_memory_dump,
475 ``xp /``\ *fmt* *addr*
476 Physical memory dump starting at *addr*.
478 *fmt* is a format which tells the command how to format the
479 data. Its syntax is: ``/{count}{format}{size}``
482 is the number of items to be dumped.
484 can be x (hex), d (signed decimal), u (unsigned decimal), o (octal),
485 c (char) or i (asm instruction).
487 can be b (8 bits), h (16 bits), w (32 bits) or g (64 bits). On x86,
488 ``h`` or ``w`` can be specified with the ``i`` format to
489 respectively select 16 or 32 bit code instruction size.
493 Dump 10 instructions at the current instruction pointer::
498 0x90107065: lea 0x0(%esi,1),%esi
499 0x90107069: lea 0x0(%edi,1),%edi
501 0x90107071: jmp 0x90107080
507 Dump 80 16 bit values at the start of the video memory::
509 (qemu) xp/80hx 0xb8000
510 0x000b8000: 0x0b50 0x0b6c 0x0b65 0x0b78 0x0b38 0x0b36 0x0b2f 0x0b42
511 0x000b8010: 0x0b6f 0x0b63 0x0b68 0x0b73 0x0b20 0x0b56 0x0b47 0x0b41
512 0x000b8020: 0x0b42 0x0b69 0x0b6f 0x0b73 0x0b20 0x0b63 0x0b75 0x0b72
513 0x000b8030: 0x0b72 0x0b65 0x0b6e 0x0b74 0x0b2d 0x0b63 0x0b76 0x0b73
514 0x000b8040: 0x0b20 0x0b30 0x0b35 0x0b20 0x0b4e 0x0b6f 0x0b76 0x0b20
515 0x000b8050: 0x0b32 0x0b30 0x0b30 0x0b33 0x0720 0x0720 0x0720 0x0720
516 0x000b8060: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720
517 0x000b8070: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720
518 0x000b8080: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720
519 0x000b8090: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720
525 .args_type = "addr:l",
527 .help = "print the host virtual address corresponding to a guest physical address",
533 Print the host virtual address at which the guest's physical address
*addr
*
540 .args_type
= "addr:l",
542 .help
= "print the host physical address corresponding to a guest physical address",
549 Print the host physical address at which the guest
's physical address *addr*
555 .args_type = "addr:l",
557 .help = "print the guest physical address corresponding to a guest virtual address",
563 Print the guest physical address at which the guest's virtual address
*addr
*
564 is mapped based on the mapping
for the current CPU
.
569 .args_type
= "fmt:/,val:l",
570 .params
= "/fmt expr",
571 .help
= "print expression value (use $reg for CPU register access)",
576 ``print`` or ``p
/``\
*fmt
* *expr
*
577 Print expression value
. Only the
*format
* part of
*fmt
* is
583 .args_type
= "fmt:/,addr:i,index:i.",
584 .params
= "/fmt addr",
585 .help
= "I/O port read",
586 .cmd
= hmp_ioport_read
,
590 ``i
/``\
*fmt
* *addr
* [.\
*index
*\
]
596 .args_type
= "fmt:/,addr:i,val:i",
597 .params
= "/fmt addr value",
598 .help
= "I/O port write",
599 .cmd
= hmp_ioport_write
,
603 ``o
/``\
*fmt
* *addr
* *val
*
609 .args_type
= "keys:s,hold-time:i?",
610 .params
= "keys [hold_ms]",
611 .help
= "send keys to the VM (e.g. 'sendkey ctrl-alt-f1', default hold time=100 ms)",
613 .command_completion
= sendkey_completion
,
618 Send
*keys
* to the guest
. *keys
* could be the name of the
619 key or the raw value
in hexadecimal format
. Use ``
-`` to press
620 several keys simultaneously
. Example
::
624 This command is useful to send keys that your graphical user
interface
625 intercepts at low level
, such as ``ctrl
-alt
-f1``
in X Window
.
628 .name
= "sync-profile",
629 .args_type
= "op:s?",
630 .params
= "[on|off|reset]",
631 .help
= "enable, disable or reset synchronization profiling. "
632 "With no arguments, prints whether profiling is on or off.",
633 .cmd
= hmp_sync_profile
,
637 ``sync
-profile
[on|off|reset
]``
638 Enable
, disable or reset synchronization profiling
. With no arguments
, prints
639 whether profiling is on or off
.
643 .name
= "system_reset",
646 .help
= "reset the system",
647 .cmd
= hmp_system_reset
,
656 .name
= "system_powerdown",
659 .help
= "send system power down event",
660 .cmd
= hmp_system_powerdown
,
665 Power down the
system (if supported
).
670 .args_type
= "start:i,size:i",
671 .params
= "addr size",
672 .help
= "compute the checksum of a memory region",
677 ``sum``
*addr
* *size
*
678 Compute the checksum of a memory region
.
682 .name
= "device_add",
683 .args_type
= "device:O",
684 .params
= "driver[,prop=value][,...]",
685 .help
= "add device, like -device on the command line",
686 .cmd
= hmp_device_add
,
687 .command_completion
= device_add_completion
,
691 ``device_add``
*config
*
696 .name
= "device_del",
699 .help
= "remove device",
700 .cmd
= hmp_device_del
,
701 .command_completion
= device_del_completion
,
706 Remove device
*id
*. *id
* may be a short ID
707 or a QOM object path
.
712 .args_type
= "index:i",
714 .help
= "set the default CPU",
724 .name
= "mouse_move",
725 .args_type
= "dx_str:s,dy_str:s,dz_str:s?",
726 .params
= "dx dy [dz]",
727 .help
= "send mouse move events",
728 .cmd
= hmp_mouse_move
,
732 ``mouse_move``
*dx
* *dy
* [*dz
*]
733 Move the active mouse to the specified coordinates
*dx
* *dy
*
734 with optional scroll axis
*dz
*.
738 .name
= "mouse_button",
739 .args_type
= "button_state:i",
741 .help
= "change mouse button state (1=L, 2=M, 4=R)",
742 .cmd
= hmp_mouse_button
,
746 ``mouse_button``
*val
*
747 Change the active mouse button state
*val
* (1=L
, 2=M
, 4=R
).
752 .args_type
= "index:i",
754 .help
= "set which mouse device receives events",
755 .cmd
= hmp_mouse_set
,
759 ``mouse_set``
*index
*
760 Set which mouse device receives events at given
*index
*, index
761 can be obtained with
::
768 .name
= "wavcapture",
769 .args_type
= "path:F,audiodev:s,freq:i?,bits:i?,nchannels:i?",
770 .params
= "path audiodev [frequency [bits [channels]]]",
771 .help
= "capture audio to a wave file (default frequency=44100 bits=16 channels=2)",
772 .cmd
= hmp_wavcapture
,
775 ``wavcapture``
*filename
* *audiodev
* [*frequency
* [*bits
* [*channels
*]]]
776 Capture audio into
*filename
* from
*audiodev
*, using sample rate
777 *frequency
* bits per sample
*bits
* and number of channels
782 - Sample rate
= 44100 Hz
- CD quality
784 - Number of channels
= 2 - Stereo
788 .name
= "stopcapture",
790 .params
= "capture index",
791 .help
= "stop capture",
792 .cmd
= hmp_stopcapture
,
795 ``stopcapture``
*index
*
796 Stop capture with a given
*index
*, index can be obtained with
::
804 .args_type
= "val:l,size:i,filename:s",
805 .params
= "addr size file",
806 .help
= "save to disk virtual memory dump starting at 'addr' of size 'size'",
811 ``memsave``
*addr
* *size
* *file
*
812 save to disk virtual memory dump starting at
*addr
* of size
*size
*.
817 .args_type
= "val:l,size:i,filename:s",
818 .params
= "addr size file",
819 .help
= "save to disk physical memory dump starting at 'addr' of size 'size'",
824 ``pmemsave``
*addr
* *size
* *file
*
825 save to disk physical memory dump starting at
*addr
* of size
*size
*.
830 .args_type
= "bootdevice:s",
831 .params
= "bootdevice",
832 .help
= "define new values for the boot device list",
837 ``boot_set``
*bootdevicelist
*
838 Define
new values
for the boot device list
. Those values will
override
839 the values specified on the command line through the ``
-boot`` option
.
841 The values that can be specified
here depend on the machine type
, but are
842 the same that can be specified
in the ``
-boot`` command line option
.
849 .help
= "inject an NMI",
854 Inject an NMI on the
default CPU (x86
/s390
) or all
CPUs (ppc64
).
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
,
867 ``ringbuf_write``
*device
* *data
*
868 Write
*data
* to ring buffer character device
*device
*.
869 *data
* must be a UTF
-8 string
.
873 .name
= "ringbuf_read",
874 .args_type
= "device:s,size:i",
875 .params
= "device size",
876 .help
= "Read from a ring buffer character device",
877 .cmd
= hmp_ringbuf_read
,
878 .command_completion
= ringbuf_write_completion
,
882 ``ringbuf_read``
*device
*
883 Read and print up to
*size
* bytes from ring buffer character
885 Certain non
-printable characters are printed ``\uXXXX``
, where ``XXXX`` is the
886 character code
in hexadecimal
. Character ``\`` is printed ``
\\``
.
887 Bug
: can screw up when the buffer contains invalid UTF
-8 sequences
,
888 NUL characters
, after the ring buffer lost data
, and when reading
889 stops because the size limit is reached
.
893 .name
= "announce_self",
894 .args_type
= "interfaces:s?,id:s?",
895 .params
= "[interfaces] [id]",
896 .help
= "Trigger GARP/RARP announcements",
897 .cmd
= hmp_announce_self
,
902 Trigger a round of GARP
/RARP broadcasts
; this is useful
for explicitly
903 updating the network infrastructure after a reconfiguration or some forms
904 of migration
. The timings of the round are set by the migration announce
905 parameters
. An optional comma separated
*interfaces
* list restricts the
906 announce to the named set of interfaces
. An optional
*id
* can be used to
907 start a separate announce timer and to change the parameters of it later
.
912 .args_type
= "detach:-d,blk:-b,inc:-i,resume:-r,uri:s",
913 .params
= "[-d] [-b] [-i] [-r] uri",
914 .help
= "migrate to URI (using -d to not wait for completion)"
915 "\n\t\t\t -b for migration without shared storage with"
916 " full copy of disk\n\t\t\t -i for migration without "
917 "shared storage with incremental copy of disk "
918 "(base image shared between src and destination)"
919 "\n\t\t\t -r to resume a paused migration",
925 ``migrate
[-d
] [-b
] [-i
]``
*uri
*
926 Migrate to
*uri
* (using -d to not wait
for completion
).
929 for migration with full copy of disk
931 for migration with incremental copy of
disk (base image is shared
)
935 .name
= "migrate_cancel",
938 .help
= "cancel the current VM migration",
939 .cmd
= hmp_migrate_cancel
,
944 Cancel the current VM migration
.
948 .name
= "migrate_continue",
949 .args_type
= "state:s",
951 .help
= "Continue migration from the given paused state",
952 .cmd
= hmp_migrate_continue
,
955 ``migrate_continue``
*state
*
956 Continue migration from the paused state
*state
*
960 .name
= "migrate_incoming",
961 .args_type
= "uri:s",
963 .help
= "Continue an incoming migration from an -incoming defer",
964 .cmd
= hmp_migrate_incoming
,
968 ``migrate_incoming``
*uri
*
969 Continue an incoming migration
using the
*uri
* (that has the same syntax
970 as the ``
-incoming`` option
).
974 .name
= "migrate_recover",
975 .args_type
= "uri:s",
977 .help
= "Continue a paused incoming postcopy migration",
978 .cmd
= hmp_migrate_recover
,
982 ``migrate_recover``
*uri
*
983 Continue a paused incoming postcopy migration
using the
*uri
*.
987 .name
= "migrate_pause",
990 .help
= "Pause an ongoing migration (postcopy-only)",
991 .cmd
= hmp_migrate_pause
,
996 Pause an ongoing migration
. Currently it only supports postcopy
.
1000 .name
= "migrate_set_capability",
1001 .args_type
= "capability:s,state:b",
1002 .params
= "capability state",
1003 .help
= "Enable/Disable the usage of a capability for migration",
1004 .cmd
= hmp_migrate_set_capability
,
1005 .command_completion
= migrate_set_capability_completion
,
1009 ``migrate_set_capability``
*capability
* *state
*
1010 Enable
/Disable the usage of a capability
*capability
* for migration
.
1014 .name
= "migrate_set_parameter",
1015 .args_type
= "parameter:s,value:s",
1016 .params
= "parameter value",
1017 .help
= "Set the parameter for migration",
1018 .cmd
= hmp_migrate_set_parameter
,
1019 .command_completion
= migrate_set_parameter_completion
,
1023 ``migrate_set_parameter``
*parameter
* *value
*
1024 Set the parameter
*parameter
* for migration
.
1028 .name
= "migrate_start_postcopy",
1031 .help
= "Followup to a migration command to switch the migration"
1032 " to postcopy mode. The postcopy-ram capability must "
1033 "be set on both source and destination before the "
1034 "original migration command .",
1035 .cmd
= hmp_migrate_start_postcopy
,
1039 ``migrate_start_postcopy``
1040 Switch
in-progress migration to postcopy mode
. Ignored after the end of
1041 migration (or once already
in postcopy
).
1044 #ifdef CONFIG_REPLICATION
1046 .name
= "x_colo_lost_heartbeat",
1049 .help
= "Tell COLO that heartbeat is lost,\n\t\t\t"
1050 "a failover or takeover is needed.",
1051 .cmd
= hmp_x_colo_lost_heartbeat
,
1056 ``x_colo_lost_heartbeat``
1057 Tell COLO that heartbeat is lost
, a failover or takeover is needed
.
1061 .name
= "client_migrate_info",
1062 .args_type
= "protocol:s,hostname:s,port:i?,tls-port:i?,cert-subject:s?",
1063 .params
= "protocol hostname port tls-port cert-subject",
1064 .help
= "set migration information for remote display",
1065 .cmd
= hmp_client_migrate_info
,
1069 ``client_migrate_info``
*protocol
* *hostname
* *port
* *tls
-port
* *cert
-subject
*
1070 Set migration information
for remote display
. This makes the server
1071 ask the client to automatically reconnect
using the
new parameters
1072 once migration finished successfully
. Only implemented
for SPICE
.
1076 .name
= "dump-guest-memory",
1077 .args_type
= "paging:-p,detach:-d,windmp:-w,zlib:-z,lzo:-l,snappy:-s,raw:-R,filename:F,begin:l?,length:l?",
1078 .params
= "[-p] [-d] [-z|-l|-s|-w] [-R] filename [begin length]",
1079 .help
= "dump guest memory into file 'filename'.\n\t\t\t"
1080 "-p: do paging to get guest's memory mapping.\n\t\t\t"
1081 "-d: return immediately (do not wait for completion).\n\t\t\t"
1082 "-z: dump in kdump-compressed format, with zlib compression.\n\t\t\t"
1083 "-l: dump in kdump-compressed format, with lzo compression.\n\t\t\t"
1084 "-s: dump in kdump-compressed format, with snappy compression.\n\t\t\t"
1085 "-R: when using kdump (-z, -l, -s), use raw rather than makedumpfile-flattened\n\t\t\t"
1087 "-w: dump in Windows crashdump format (can be used instead of ELF-dump converting),\n\t\t\t"
1088 " for Windows x86 and x64 guests with vmcoreinfo driver only.\n\t\t\t"
1089 "begin: the starting physical address.\n\t\t\t"
1090 "length: the memory size, in bytes.",
1091 .cmd
= hmp_dump_guest_memory
,
1095 ``dump
-guest
-memory
[-p
]``
*filename
* *begin
* *length
*
1097 ``dump
-guest
-memory
[-z|
-l|
-s|
-w
]``
*filename
*
1098 Dump guest memory to
*protocol
*. The file can be processed with crash or
1099 gdb
. Without ``
-z|
-l|
-s|
-w``
, the dump format is ELF
.
1102 do paging to get guest
's memory mapping.
1104 dump in kdump-compressed format, with zlib compression.
1106 dump in kdump-compressed format, with lzo compression.
1108 dump in kdump-compressed format, with snappy compression.
1110 when using kdump (-z, -l, -s), use raw rather than makedumpfile-flattened
1113 dump in Windows crashdump format (can be used instead of ELF-dump converting),
1114 for Windows x64 guests with vmcoreinfo driver only
1118 the starting physical address. It's optional
, and should be
1119 specified together with
*length
*.
1121 the memory size
, in bytes
. It
's optional, and should be specified
1122 together with *begin*.
1126 #if defined(TARGET_S390X)
1128 .name = "dump-skeys",
1129 .args_type = "filename:F",
1131 .help = "Save guest storage keys into file 'filename
'.\n",
1132 .cmd = hmp_dump_skeys,
1137 ``dump-skeys`` *filename*
1138 Save guest storage keys to a file.
1141 #if defined(TARGET_S390X)
1143 .name = "migration_mode",
1144 .args_type = "mode:i",
1146 .help = "Enables or disables migration mode\n",
1147 .cmd = hmp_migrationmode,
1152 ``migration_mode`` *mode*
1153 Enables or disables migration mode.
1157 .name = "snapshot_blkdev",
1158 .args_type = "reuse:-n,device:B,snapshot-file:s?,format:s?",
1159 .params = "[-n] device [new-image-file] [format]",
1160 .help = "initiates a live snapshot\n\t\t\t"
1161 "of device. If a new image file is specified, the\n\t\t\t"
1162 "new image file will become the new root image.\n\t\t\t"
1163 "If format is specified, the snapshot file will\n\t\t\t"
1164 "be created in that format.\n\t\t\t"
1165 "The default format is qcow2. The -n flag requests QEMU\n\t\t\t"
1166 "to reuse the image found in new-image-file, instead of\n\t\t\t"
1167 "recreating it from scratch.",
1168 .cmd = hmp_snapshot_blkdev,
1173 Snapshot device, using snapshot file as target if provided
1177 .name = "snapshot_blkdev_internal",
1178 .args_type = "device:B,name:s",
1179 .params = "device name",
1180 .help = "take an internal snapshot of device.\n\t\t\t"
1181 "The format of the image used by device must\n\t\t\t"
1182 "support it, such as qcow2.\n\t\t\t",
1183 .cmd = hmp_snapshot_blkdev_internal,
1187 ``snapshot_blkdev_internal``
1188 Take an internal snapshot on device if it support
1192 .name = "snapshot_delete_blkdev_internal",
1193 .args_type = "device:B,name:s,id:s?",
1194 .params = "device name [id]",
1195 .help = "delete an internal snapshot of device.\n\t\t\t"
1196 "If id is specified, qemu will try delete\n\t\t\t"
1197 "the snapshot matching both id and name.\n\t\t\t"
1198 "The format of the image used by device must\n\t\t\t"
1199 "support it, such as qcow2.\n\t\t\t",
1200 .cmd = hmp_snapshot_delete_blkdev_internal,
1204 ``snapshot_delete_blkdev_internal``
1205 Delete an internal snapshot on device if it support
1209 .name = "drive_mirror",
1210 .args_type = "reuse:-n,full:-f,device:B,target:s,format:s?",
1211 .params = "[-n] [-f] device target [format]",
1212 .help = "initiates live storage\n\t\t\t"
1213 "migration for a device. The device's contents are
\n\t\t\t"
1214 "copied to the
new image file
, including data that
\n\t\t\t"
1215 "is written after the command is started
.\n\t\t\t"
1216 "The
-n flag requests QEMU to reuse the image found
\n\t\t\t"
1217 "in new-image
-file
, instead of recreating it from scratch
.\n\t\t\t"
1218 "The
-f flag requests QEMU to copy the whole disk
,\n\t\t\t"
1219 "so that the result does not need a backing file
.\n\t\t\t",
1220 .cmd = hmp_drive_mirror,
1224 Start mirroring a block device's writes to a new destination,
1225 using the specified target.
1229 .name = "drive_backup
",
1230 .args_type = "reuse
:-n
,full
:-f
,compress
:-c
,device
:B
,target
:s
,format
:s?
",
1231 .params = "[-n
] [-f
] [-c
] device target
[format
]",
1232 .help = "initiates a point
-in-time
\n\t\t\t"
1233 "copy
for a device
. The device
's contents are\n\t\t\t"
1234 "copied to the new image file, excluding data that\n\t\t\t"
1235 "is written after the command is started.\n\t\t\t"
1236 "The -n flag requests QEMU to reuse the image found\n\t\t\t"
1237 "in new-image-file, instead of recreating it from scratch.\n\t\t\t"
1238 "The -f flag requests QEMU to copy the whole disk,\n\t\t\t"
1239 "so that the result does not need a backing file.\n\t\t\t"
1240 "The -c flag requests QEMU to compress backup data\n\t\t\t"
1241 "(if the target format supports it).\n\t\t\t",
1242 .cmd = hmp_drive_backup,
1246 Start a point-in-time copy of a block device to a specified target.
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 "[,snapshot=on|off][,cache=on|off]\n"
1256 "[,readonly=on|off][,copy-on-read=on|off]",
1257 .help = "add drive to PCI storage controller",
1258 .cmd = hmp_drive_add,
1263 Add drive to PCI storage controller.
1267 .name = "pcie_aer_inject_error",
1268 .args_type = "advisory_non_fatal:-a,correctable:-c,"
1269 "id:s,error_status:s,"
1270 "header0:i?,header1:i?,header2:i?,header3:i?,"
1271 "prefix0:i?,prefix1:i?,prefix2:i?,prefix3:i?",
1272 .params = "[-a] [-c] id "
1273 "<error_status> [<tlp header> [<tlp header prefix>]]",
1274 .help = "inject pcie aer error\n\t\t\t"
1275 " -a for advisory non fatal error\n\t\t\t"
1276 " -c for correctable error\n\t\t\t"
1277 "<id> = qdev device id\n\t\t\t"
1278 "<error_status> = error string or 32bit\n\t\t\t"
1279 "<tlp header> = 32bit x 4\n\t\t\t"
1280 "<tlp header prefix> = 32bit x 4",
1281 .cmd = hmp_pcie_aer_inject_error,
1285 ``pcie_aer_inject_error``
1286 Inject PCIe AER error
1290 .name = "netdev_add",
1291 .args_type = "netdev:O",
1292 .params = "[user|tap|socket|stream|dgram|vde|bridge|hubport|netmap|vhost-user"
1293 #ifdef CONFIG_AF_XDP
1297 "|vmnet-host|vmnet-shared|vmnet-bridged"
1299 "],id=str[,prop=value][,...]",
1300 .help = "add host network device",
1301 .cmd = hmp_netdev_add,
1302 .command_completion = netdev_add_completion,
1308 Add host network device.
1312 .name = "netdev_del",
1313 .args_type = "id:s",
1315 .help = "remove host network device",
1316 .cmd = hmp_netdev_del,
1317 .command_completion = netdev_del_completion,
1323 Remove host network device.
1327 .name = "object_add",
1328 .args_type = "object:S",
1329 .params = "[qom-type=]type,id=str[,prop=value][,...]",
1330 .help = "create QOM object",
1331 .cmd = hmp_object_add,
1332 .command_completion = object_add_completion,
1342 .name = "object_del",
1343 .args_type = "id:s",
1345 .help = "destroy QOM object",
1346 .cmd = hmp_object_del,
1347 .command_completion = object_del_completion,
1358 .name = "hostfwd_add",
1359 .args_type = "arg1:s,arg2:s?",
1360 .params = "[netdev_id] [tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport",
1361 .help = "redirect TCP or UDP connections from host to guest (requires -net user)",
1362 .cmd = hmp_hostfwd_add,
1367 Redirect TCP or UDP connections from host to guest (requires -net user).
1372 .name = "hostfwd_remove",
1373 .args_type = "arg1:s,arg2:s?",
1374 .params = "[netdev_id] [tcp|udp]:[hostaddr]:hostport",
1375 .help = "remove host-to-guest TCP or UDP redirection",
1376 .cmd = hmp_hostfwd_remove,
1382 Remove host-to-guest TCP or UDP redirection.
1387 .args_type = "value:M",
1389 .help = "request VM to change its memory allocation (in MB)",
1395 Request VM to change its memory allocation to *value* (in MB).
1400 .args_type = "name:s,up:b",
1401 .params = "name on|off",
1402 .help = "change the link status of a network adapter",
1403 .cmd = hmp_set_link,
1404 .command_completion = set_link_completion,
1408 ``set_link`` *name* ``[on|off]``
1409 Switch link *name* on (i.e. up) or off (i.e. down).
1413 .name = "watchdog_action",
1414 .args_type = "action:s",
1415 .params = "[reset|shutdown|poweroff|pause|debug|none]",
1416 .help = "change watchdog action",
1417 .cmd = hmp_watchdog_action,
1418 .command_completion = watchdog_action_completion,
1423 Change watchdog action.
1427 .name = "nbd_server_start",
1428 .args_type = "all:-a,writable:-w,uri:s",
1429 .params = "nbd_server_start [-a] [-w] host:port",
1430 .help = "serve block devices on the given host and port",
1431 .cmd = hmp_nbd_server_start,
1435 ``nbd_server_start`` *host*:*port*
1436 Start an NBD server on the given host and/or port. If the ``-a``
1437 option is included, all of the virtual machine's block devices that
1438 have an inserted media on them are automatically exported
; in this case,
1439 the ``
-w`` option makes the devices writable too
.
1443 .name
= "nbd_server_add",
1444 .args_type
= "writable:-w,device:B,name:s?",
1445 .params
= "nbd_server_add [-w] device [name]",
1446 .help
= "export a block device via NBD",
1447 .cmd
= hmp_nbd_server_add
,
1451 ``nbd_server_add``
*device
* [ *name
* ]
1452 Export a block device through QEMU
's NBD server, which must be started
1453 beforehand with ``nbd_server_start``. The ``-w`` option makes the
1454 exported device writable too. The export name is controlled by *name*,
1455 defaulting to *device*.
1459 .name = "nbd_server_remove",
1460 .args_type = "force:-f,name:s",
1461 .params = "nbd_server_remove [-f] name",
1462 .help = "remove an export previously exposed via NBD",
1463 .cmd = hmp_nbd_server_remove,
1467 ``nbd_server_remove [-f]`` *name*
1468 Stop exporting a block device through QEMU's NBD server
, which was
1469 previously started with ``nbd_server_add``
. The ``
-f``
1470 option forces the server to drop the export immediately even
if
1471 clients are connected
; otherwise the command fails unless there are no
1476 .name
= "nbd_server_stop",
1478 .params
= "nbd_server_stop",
1479 .help
= "stop serving block devices using the NBD protocol",
1480 .cmd
= hmp_nbd_server_stop
,
1485 Stop the QEMU embedded NBD server
.
1489 #
if defined(TARGET_I386
)
1493 .args_type
= "broadcast:-b,cpu_index:i,bank:i,status:l,mcg_status:l,addr:l,misc:l",
1494 .params
= "[-b] cpu bank status mcgstatus addr misc",
1495 .help
= "inject a MCE on the given CPU [and broadcast to other CPUs with -b option]",
1501 ``mce``
*cpu
* *bank
* *status
* *mcgstatus
* *addr
* *misc
*
1502 Inject an MCE on the given
CPU (x86 only
).
1508 .args_type
= "fdname:s",
1509 .params
= "getfd name",
1510 .help
= "receive a file descriptor via SCM rights and assign it a name",
1517 If a file descriptor is passed alongside
this command
using the SCM_RIGHTS
1518 mechanism on unix sockets
, it is stored
using the name
*fdname
* for
1519 later use by other monitor commands
.
1525 .args_type
= "fdname:s",
1526 .params
= "closefd name",
1527 .help
= "close a file descriptor previously passed via SCM rights",
1533 ``closefd``
*fdname
*
1534 Close the file descriptor previously assigned to
*fdname
* using the
1535 ``getfd`` command
. This is only needed
if the file descriptor was
never
1536 used by another monitor command
.
1540 .name
= "block_set_io_throttle",
1541 .args_type
= "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l",
1542 .params
= "device bps bps_rd bps_wr iops iops_rd iops_wr",
1543 .help
= "change I/O throttle limits for a block drive",
1544 .cmd
= hmp_block_set_io_throttle
,
1549 ``block_set_io_throttle``
*device
* *bps
* *bps_rd
* *bps_wr
* *iops
* *iops_rd
* *iops_wr
*
1550 Change I
/O throttle limits
for a block drive to
1551 *bps
* *bps_rd
* *bps_wr
* *iops
* *iops_rd
* *iops_wr
*.
1552 *device
* can be a block device name
, a qdev ID or a QOM path
.
1556 .name
= "set_password",
1557 .args_type
= "protocol:s,password:s,display:-ds,connected:s?",
1558 .params
= "protocol password [-d display] [action-if-connected]",
1559 .help
= "set spice/vnc password",
1560 .cmd
= hmp_set_password
,
1564 ``set_password
[ vnc | spice
] password
[ -d display
] [ action
-if-connected
]``
1565 Change spice
/vnc password
. *display
* can be used with
'vnc' to specify
1566 which display to set the password on
. *action
-if-connected
* specifies
1567 what should happen
in case a connection is established
: *fail
* makes
1568 the password change fail
. *disconnect
* changes the password and
1569 disconnects the client
. *keep
* changes the password and keeps the
1570 connection up
. *keep
* is the
default.
1574 .name
= "expire_password",
1575 .args_type
= "protocol:s,time:s,display:-ds",
1576 .params
= "protocol time [-d display]",
1577 .help
= "set spice/vnc password expire-time",
1578 .cmd
= hmp_expire_password
,
1582 ``expire_password
[ vnc | spice
] expire
-time
[ -d display
]``
1583 Specify when a password
for spice
/vnc becomes invalid
.
1584 *display
* behaves the same as
in ``set_password``
.
1585 *expire
-time
* accepts
:
1588 Invalidate password instantly
.
1590 Password stays valid forever
.
1592 Password stays valid
for *nsec
* seconds starting now
.
1594 Password is invalidated at the given time
. *nsec
* are the seconds
1595 passed since
1970, i
.e
. unix epoch
.
1600 .name
= "chardev-add",
1601 .args_type
= "args:s",
1603 .help
= "add chardev",
1604 .cmd
= hmp_chardev_add
,
1605 .command_completion
= chardev_add_completion
,
1609 ``chardev
-add``
*args
*
1610 chardev
-add accepts the same parameters as the
-chardev command line
switch.
1614 .name
= "chardev-change",
1615 .args_type
= "id:s,args:s",
1616 .params
= "id args",
1617 .help
= "change chardev",
1618 .cmd
= hmp_chardev_change
,
1622 ``chardev
-change``
*args
*
1623 chardev
-change accepts existing chardev
*id
* and then the same arguments
1624 as the
-chardev command line
switch (except
for "id").
1628 .name
= "chardev-remove",
1629 .args_type
= "id:s",
1631 .help
= "remove chardev",
1632 .cmd
= hmp_chardev_remove
,
1633 .command_completion
= chardev_remove_completion
,
1637 ``chardev
-remove``
*id
*
1638 Removes the chardev
*id
*.
1642 .name
= "chardev-send-break",
1643 .args_type
= "id:s",
1645 .help
= "send a break on chardev",
1646 .cmd
= hmp_chardev_send_break
,
1647 .command_completion
= chardev_remove_completion
,
1651 ``chardev
-send
-break``
*id
*
1652 Send a
break on the chardev
*id
*.
1657 .args_type
= "qdev:-d,device:B,command:s",
1658 .params
= "[-d] [device] \"[command]\"",
1659 .help
= "run a qemu-io command on a block device\n\t\t\t"
1660 "-d: [device] is a device ID rather than a "
1661 "drive ID or node name",
1666 ``qemu
-io``
*device
* *command
*
1667 Executes a qemu
-io command on the given block device
.
1672 .args_type
= "path:s?",
1674 .help
= "list QOM properties",
1675 .cmd
= hmp_qom_list
,
1680 ``qom
-list``
[*path
*]
1681 Print QOM properties of object at location
*path
*
1686 .args_type
= "path:s,property:s",
1687 .params
= "path property",
1688 .help
= "print QOM property",
1694 ``qom
-get``
*path
* *property
*
1695 Print QOM property
*property
* of object at location
*path
*
1700 .args_type
= "json:-j,path:s,property:s,value:S",
1701 .params
= "[-j] path property value",
1702 .help
= "set QOM property.\n\t\t\t"
1703 "-j: the value is specified in json format.",
1709 ``qom
-set``
*path
* *property
* *value
*
1710 Set QOM property
*property
* of object at location
*path
* to value
*value
*
1714 .name
= "replay_break",
1715 .args_type
= "icount:l",
1717 .help
= "set breakpoint at the specified instruction count",
1718 .cmd
= hmp_replay_break
,
1722 ``replay_break``
*icount
*
1723 Set replay breakpoint at instruction count
*icount
*.
1724 Execution stops when the specified instruction is reached
.
1725 There can be at most one breakpoint
. When breakpoint is set
, any prior
1726 one is removed
. The breakpoint may be set only
in replay mode and only
1727 "in the future", i
.e
. at instruction counts greater than the current one
.
1728 The current instruction count can be observed with ``info replay``
.
1732 .name
= "replay_delete_break",
1735 .help
= "remove replay breakpoint",
1736 .cmd
= hmp_replay_delete_break
,
1740 ``replay_delete_break``
1741 Remove replay breakpoint which was previously set with ``replay_break``
.
1742 The command is ignored when there are no replay breakpoints
.
1746 .name
= "replay_seek",
1747 .args_type
= "icount:l",
1749 .help
= "replay execution to the specified instruction count",
1750 .cmd
= hmp_replay_seek
,
1754 ``replay_seek``
*icount
*
1755 Automatically proceed to the instruction count
*icount
*, when
1756 replaying the execution
. The command automatically loads nearest
1757 snapshot and replays the execution to find the desired instruction
.
1758 When there is no preceding snapshot or the execution is not replayed
,
1759 then the command fails
.
1760 *icount
* for the reference may be observed with ``info replay`` command
.
1764 .name
= "calc_dirty_rate",
1765 .args_type
= "dirty_ring:-r,dirty_bitmap:-b,second:l,sample_pages_per_GB:l?",
1766 .params
= "[-r] [-b] second [sample_pages_per_GB]",
1767 .help
= "start a round of guest dirty rate measurement (using -r to"
1768 "\n\t\t\t specify dirty ring as the method of calculation and"
1769 "\n\t\t\t -b to specify dirty bitmap as method of calculation)",
1770 .cmd
= hmp_calc_dirty_rate
,
1774 ``calc_dirty_rate``
*second
*
1775 Start a round of dirty rate measurement with the period specified
in *second
*.
1776 The result of the dirty rate measurement may be observed with ``info
1777 dirty_rate`` command
.
1781 .name
= "set_vcpu_dirty_limit",
1782 .args_type
= "dirty_rate:l,cpu_index:l?",
1783 .params
= "dirty_rate [cpu_index]",
1784 .help
= "set dirty page rate limit, use cpu_index to set limit"
1785 "\n\t\t\t\t\t on a specified virtual cpu",
1786 .cmd
= hmp_set_vcpu_dirty_limit
,
1790 ``set_vcpu_dirty_limit``
1791 Set dirty page rate limit on virtual CPU
, the information about all the
1792 virtual CPU dirty limit status can be observed with ``info vcpu_dirty_limit``
1797 .name
= "cancel_vcpu_dirty_limit",
1798 .args_type
= "cpu_index:l?",
1799 .params
= "[cpu_index]",
1800 .help
= "cancel dirty page rate limit, use cpu_index to cancel"
1801 "\n\t\t\t\t\t limit on a specified virtual cpu",
1802 .cmd
= hmp_cancel_vcpu_dirty_limit
,
1806 ``cancel_vcpu_dirty_limit``
1807 Cancel dirty page rate limit on virtual CPU
, the information about all the
1808 virtual CPU dirty limit status can be observed with ``info vcpu_dirty_limit``
1814 .args_type
= "item:s?",
1815 .params
= "[subcommand]",
1816 .help
= "show various information about the system state",
1817 .cmd
= hmp_info_help
,
1818 .sub_table
= hmp_info_cmds
,
1822 #
if defined(CONFIG_FDT
)
1825 .args_type
= "filename:F",
1826 .params
= "filename",
1827 .help
= "dump the FDT in dtb format to 'filename'",
1832 ``dumpdtb``
*filename
*
1833 Dump the FDT
in dtb format to
*filename
*.
1837 #
if defined(CONFIG_XEN_EMU
)
1839 .name
= "xen-event-inject",
1840 .args_type
= "port:i",
1842 .help
= "inject event channel",
1843 .cmd
= hmp_xen_event_inject
,
1847 ``xen
-event
-inject``
*port
*
1848 Notify guest via event channel on port
*port
*.
1853 .name
= "xen-event-list",
1856 .help
= "list event channel state",
1857 .cmd
= hmp_xen_event_list
,
1862 List event channels
in the guest