Server's responses in the examples below are always a success response, please
refer to the QMP specification for more details on error responses.
-quit
-----
-
-Quit the emulator.
-
-Arguments: None.
-
-Example:
-
--> { "execute": "quit" }
-<- { "return": {} }
-
eject
-----
Note: The "force" argument defaults to false.
-change
-------
-
-Change a removable medium or VNC configuration.
-
-Arguments:
-
-- "device": device name (json-string)
-- "target": filename or item (json-string)
-- "arg": additional argument (json-string, optional)
-
-Examples:
-
-1. Change a removable medium
-
--> { "execute": "change",
- "arguments": { "device": "ide1-cd0",
- "target": "/srv/images/Fedora-12-x86_64-DVD.iso" } }
-<- { "return": {} }
-
-2. Change VNC password
-
--> { "execute": "change",
- "arguments": { "device": "vnc", "target": "password",
- "arg": "foobar1" } }
-<- { "return": {} }
-
screendump
----------
-> { "execute": "screendump", "arguments": { "filename": "/tmp/image" } }
<- { "return": {} }
-stop
-----
-
-Stop the emulator.
-
-Arguments: None.
-
-Example:
-
--> { "execute": "stop" }
-<- { "return": {} }
-
-cont
-----
-
-Resume emulation.
-
-Arguments: None.
-
-Example:
-
--> { "execute": "cont" }
-<- { "return": {} }
-
-system_wakeup
--------------
-
-Wakeup guest from suspend.
-
-Arguments: None.
-
-Example:
-
--> { "execute": "system_wakeup" }
-<- { "return": {} }
-
-system_reset
-------------
-
-Reset the system.
-
-Arguments: None.
-
-Example:
-
--> { "execute": "system_reset" }
-<- { "return": {} }
-
-system_powerdown
-----------------
-
-Send system power down event.
-
-Arguments: None.
-
-Example:
-
--> { "execute": "system_powerdown" }
-<- { "return": {} }
-
device_add
----------
(2) It's possible to list device properties by running QEMU with the
"-device DEVICE,\?" command-line argument, where DEVICE is the device's name
-device_del
-----------
-
-Remove a device.
-
-Arguments:
-
-- "id": the device's ID or QOM path (json-string)
-
-Example:
-
--> { "execute": "device_del", "arguments": { "id": "net1" } }
-<- { "return": {} }
-
-Example:
-
--> { "execute": "device_del", "arguments": { "id": "/machine/peripheral-anon/device[0]" } }
-<- { "return": {} }
-
send-key
----------
Note: CPUs' indexes are obtained with the 'query-cpus' command.
-cpu-add
--------
-
-Adds virtual cpu
-
-Arguments:
-
-- "id": cpu id (json-int)
-
-Example:
-
--> { "execute": "cpu-add", "arguments": { "id": 2 } }
-<- { "return": {} }
-
-memsave
--------
-
-Save to disk virtual memory dump starting at 'val' of size 'size'.
-
-Arguments:
-
-- "val": the starting address (json-int)
-- "size": the memory size, in bytes (json-int)
-- "filename": file path (json-string)
-- "cpu": virtual CPU index (json-int, optional)
-
-Example:
-
--> { "execute": "memsave",
- "arguments": { "val": 10,
- "size": 100,
- "filename": "/tmp/virtual-mem-dump" } }
-<- { "return": {} }
-
-pmemsave
---------
-
-Save to disk physical memory dump starting at 'val' of size 'size'.
-
-Arguments:
-
-- "val": the starting address (json-int)
-- "size": the memory size, in bytes (json-int)
-- "filename": file path (json-string)
-
-Example:
-
--> { "execute": "pmemsave",
- "arguments": { "val": 10,
- "size": 100,
- "filename": "/tmp/physical-mem-dump" } }
-<- { "return": {} }
-
-inject-nmi
-----------
-
-Inject an NMI on the default CPU (x86/s390) or all CPUs (ppc64).
-
-Arguments: None.
-
-Example:
-
--> { "execute": "inject-nmi" }
-<- { "return": {} }
-
-Note: inject-nmi fails when the guest doesn't support injecting.
-
-ringbuf-write
--------------
-
-Write to a ring buffer character device.
-
-Arguments:
-
-- "device": ring buffer character device name (json-string)
-- "data": data to write (json-string)
-- "format": data format (json-string, optional)
- - Possible values: "utf8" (default), "base64"
-
-Example:
-
--> { "execute": "ringbuf-write",
- "arguments": { "device": "foo",
- "data": "abcdefgh",
- "format": "utf8" } }
-<- { "return": {} }
-
-ringbuf-read
--------------
-
-Read from a ring buffer character device.
-
-Arguments:
-
-- "device": ring buffer character device name (json-string)
-- "size": how many bytes to read at most (json-int)
- - Number of data bytes, not number of characters in encoded data
-- "format": data format (json-string, optional)
- - Possible values: "utf8" (default), "base64"
- - Naturally, format "utf8" works only when the ring buffer
- contains valid UTF-8 text. Invalid UTF-8 sequences get
- replaced. Bug: replacement doesn't work. Bug: can screw
- up on encountering NUL characters, after the ring buffer
- lost data, and when reading stops because the size limit
- is reached.
-
-Example:
-
--> { "execute": "ringbuf-read",
- "arguments": { "device": "foo",
- "size": 1000,
- "format": "utf8" } }
-<- {"return": "abcdefgh"}
-
-xen-save-devices-state
--------
-
-Save the state of all devices to file. The RAM and the block devices
-of the VM are not saved by this command.
-
-Arguments:
-
-- "filename": the file to save the state of the devices to as binary
-data. See xen-save-devices-state.txt for a description of the binary
-format.
-
-Example:
-
--> { "execute": "xen-save-devices-state",
- "arguments": { "filename": "/tmp/save" } }
-<- { "return": {} }
-
xen-load-devices-state
----------------------
"arguments": { "filename": "/tmp/resume" } }
<- { "return": {} }
-xen-set-global-dirty-log
--------
-
-Enable or disable the global dirty log mode.
-
-Arguments:
-
-- "enable": Enable it or disable it.
-
-Example:
-
--> { "execute": "xen-set-global-dirty-log",
- "arguments": { "enable": true } }
-<- { "return": {} }
-
-migrate
--------
-
-Migrate to URI.
-
-Arguments:
-
-- "blk": block migration, full disk copy (json-bool, optional)
-- "inc": incremental disk copy (json-bool, optional)
-- "uri": Destination URI (json-string)
-
-Example:
-
--> { "execute": "migrate", "arguments": { "uri": "tcp:0:4446" } }
-<- { "return": {} }
-
-Notes:
-
-(1) The 'query-migrate' command should be used to check migration's progress
- and final result (this information is provided by the 'status' member)
-(2) All boolean arguments default to false
-(3) The user Monitor's "detach" argument is invalid in QMP and should not
- be used
-
-migrate_cancel
---------------
-
-Cancel the current migration.
-
-Arguments: None.
-
-Example:
-
--> { "execute": "migrate_cancel" }
-<- { "return": {} }
-
-migrate-incoming
-----------------
-
-Continue an incoming migration
-
-Arguments:
-
-- "uri": Source/listening URI (json-string)
-
-Example:
-
--> { "execute": "migrate-incoming", "arguments": { "uri": "tcp::4446" } }
-<- { "return": {} }
-
-Notes:
-
-(1) QEMU must be started with -incoming defer to allow migrate-incoming to
- be used
-(2) The uri format is the same as for -incoming
-
migrate-set-cache-size
----------------------
-> { "execute": "migrate-set-cache-size", "arguments": { "value": 536870912 } }
<- { "return": {} }
-migrate-start-postcopy
-----------------------
-
-Switch an in-progress migration to postcopy mode. Ignored after the end of
-migration (or once already in postcopy).
-
-Example:
--> { "execute": "migrate-start-postcopy" }
-<- { "return": {} }
-
-query-migrate-cache-size
-------------------------
-
-Show cache size to be used by XBZRLE migration
-
-returns a json-object with the following information:
-- "size" : json-int
-
-Example:
-
--> { "execute": "query-migrate-cache-size" }
-<- { "return": 67108864 }
-
-migrate_set_speed
------------------
-
-Set maximum speed for migrations.
-
-Arguments:
-
-- "value": maximum speed, in bytes per second (json-int)
-
-Example:
-
--> { "execute": "migrate_set_speed", "arguments": { "value": 1024 } }
-<- { "return": {} }
-
-migrate_set_downtime
+x-colo-lost-heartbeat
--------------------
-Set maximum tolerated downtime (in seconds) for migrations.
-
-Arguments:
-
-- "value": maximum downtime (json-number)
-
-Example:
-
--> { "execute": "migrate_set_downtime", "arguments": { "value": 0.1 } }
-<- { "return": {} }
-
-client_migrate_info
--------------------
-
-Set migration information for remote display. This makes the server
-ask the client to automatically reconnect using the new parameters
-once migration finished successfully. Only implemented for SPICE.
-
-Arguments:
-
-- "protocol": must be "spice" (json-string)
-- "hostname": migration target hostname (json-string)
-- "port": spice tcp port for plaintext channels (json-int, optional)
-- "tls-port": spice tcp port for tls-secured channels (json-int, optional)
-- "cert-subject": server certificate subject (json-string, optional)
-
-Example:
-
--> { "execute": "client_migrate_info",
- "arguments": { "protocol": "spice",
- "hostname": "virt42.lab.kraxel.org",
- "port": 1234 } }
-<- { "return": {} }
-
-dump
-
-
-Dump guest memory to file. The file can be processed with crash or gdb.
-
-Arguments:
-
-- "paging": do paging to get guest's memory mapping (json-bool)
-- "protocol": destination file(started with "file:") or destination file
- descriptor (started with "fd:") (json-string)
-- "detach": if specified, command will return immediately, without waiting
- for the dump to finish. The user can track progress using
- "query-dump". (json-bool)
-- "begin": the starting physical address. It's optional, and should be specified
- with length together (json-int)
-- "length": the memory size, in bytes. It's optional, and should be specified
- with begin together (json-int)
-- "format": the format of guest memory dump. It's optional, and can be
- elf|kdump-zlib|kdump-lzo|kdump-snappy, but non-elf formats will
- conflict with paging and filter, ie. begin and length (json-string)
+Tell COLO that heartbeat is lost, a failover or takeover is needed.
Example:
--> { "execute": "dump-guest-memory", "arguments": { "protocol": "fd:dump" } }
+-> { "execute": "x-colo-lost-heartbeat" }
<- { "return": {} }
-Notes:
-
-(1) All boolean arguments default to false
-
-query-dump-guest-memory-capability
-----------
-
-Show available formats for 'dump-guest-memory'
-
-Example:
-
--> { "execute": "query-dump-guest-memory-capability" }
-<- { "return": { "formats":
- ["elf", "kdump-zlib", "kdump-lzo", "kdump-snappy"] }
-
query-dump
----------
- "job-id": Identifier for the newly-created block job. If omitted,
the device name will be used. (json-string, optional)
- "device": The device name or node-name of a root node (json-string)
-- "base": The file name of the backing image above which copying starts
- (json-string, optional)
+- "base": The file name of the backing image above which copying starts.
+ It cannot be set if 'base-node' is also set (json-string, optional)
+- "base-node": the node name of the backing image above which copying starts.
+ It cannot be set if 'base' is also set.
+ (json-string, optional) (Since 2.8)
- "backing-file": The backing file string to write into the active layer. This
filename is not validated.
"target": "tgt-id" } }
<- { "return": {} }
-transaction
------------
-
-Atomically operate on one or more block devices. Operations that are
-currently supported:
-
- - drive-backup
- - blockdev-backup
- - blockdev-snapshot-sync
- - blockdev-snapshot-internal-sync
- - abort
- - block-dirty-bitmap-add
- - block-dirty-bitmap-clear
-
-Refer to the qemu/qapi-schema.json file for minimum required QEMU
-versions for these operations. A list of dictionaries is accepted,
-that contains the actions to be performed. If there is any failure
-performing any of the operations, all operations for the group are
-abandoned.
-
-For external snapshots, the dictionary contains the device, the file to use for
-the new snapshot, and the format. The default format, if not specified, is
-qcow2.
-
-Each new snapshot defaults to being created by QEMU (wiping any
-contents if the file already exists), but it is also possible to reuse
-an externally-created file. In the latter case, you should ensure that
-the new image file has the same contents as the current one; QEMU cannot
-perform any meaningful check. Typically this is achieved by using the
-current image file as the backing file for the new image.
-
-On failure, the original disks pre-snapshot attempt will be used.
-
-For internal snapshots, the dictionary contains the device and the snapshot's
-name. If an internal snapshot matching name already exists, the request will
-be rejected. Only some image formats support it, for example, qcow2, rbd,
-and sheepdog.
-
-On failure, qemu will try delete the newly created internal snapshot in the
-transaction. When an I/O error occurs during deletion, the user needs to fix
-it later with qemu-img or other command.
-
-Arguments:
-
-actions array:
- - "type": the operation to perform (json-string). Possible
- values: "drive-backup", "blockdev-backup",
- "blockdev-snapshot-sync",
- "blockdev-snapshot-internal-sync",
- "abort", "block-dirty-bitmap-add",
- "block-dirty-bitmap-clear"
- - "data": a dictionary. The contents depend on the value
- of "type". When "type" is "blockdev-snapshot-sync":
- - "device": device name to snapshot (json-string)
- - "node-name": graph node name to snapshot (json-string)
- - "snapshot-file": name of new image file (json-string)
- - "snapshot-node-name": graph node name of the new snapshot (json-string)
- - "format": format of new image (json-string, optional)
- - "mode": whether and how QEMU should create the snapshot file
- (NewImageMode, optional, default "absolute-paths")
- When "type" is "blockdev-snapshot-internal-sync":
- - "device": the device name or node-name of a root node to snapshot
- (json-string)
- - "name": name of the new snapshot (json-string)
-
-Example:
-
--> { "execute": "transaction",
- "arguments": { "actions": [
- { "type": "blockdev-snapshot-sync", "data" : { "device": "ide-hd0",
- "snapshot-file": "/some/place/my-image",
- "format": "qcow2" } },
- { "type": "blockdev-snapshot-sync", "data" : { "node-name": "myfile",
- "snapshot-file": "/some/place/my-image2",
- "snapshot-node-name": "node3432",
- "mode": "existing",
- "format": "qcow2" } },
- { "type": "blockdev-snapshot-sync", "data" : { "device": "ide-hd1",
- "snapshot-file": "/some/place/my-image2",
- "mode": "existing",
- "format": "qcow2" } },
- { "type": "blockdev-snapshot-internal-sync", "data" : {
- "device": "ide-hd2",
- "name": "snapshot0" } } ] } }
-<- { "return": {} }
-
block-dirty-bitmap-add
----------------------
Since 2.4
Example:
-> { "execute": "blockdev-add",
- "arguments": { "options": { "driver": "qcow2",
- "node-name": "node1534",
- "file": { "driver": "file",
- "filename": "hd1.qcow2" },
- "backing": "" } } }
+ "arguments": { "driver": "qcow2",
+ "node-name": "node1534",
+ "file": { "driver": "file",
+ "filename": "hd1.qcow2" },
+ "backing": "" } }
<- { "return": {} }
Returns: Nothing on success
If "device" does not exist or cannot be determined, DeviceNotFound
-balloon
--------
-
-Request VM to change its memory allocation (in bytes).
-
-Arguments:
-
-- "value": New memory allocation (json-int)
-
-Example:
-
--> { "execute": "balloon", "arguments": { "value": 536870912 } }
-<- { "return": {} }
-
-set_link
---------
-
-Change the link status of a network adapter.
-
-Arguments:
-
-- "name": network device name (json-string)
-- "up": status is up (json-bool)
-
-Example:
-
--> { "execute": "set_link", "arguments": { "name": "e1000.0", "up": false } }
-<- { "return": {} }
-
getfd
-----
"iops_size": 0 } }
<- { "return": {} }
-set_password
-------------
-
-Set the password for vnc/spice protocols.
-
-Arguments:
-
-- "protocol": protocol name (json-string)
-- "password": password (json-string)
-- "connected": [ keep | disconnect | fail ] (json-string, optional)
-
-Example:
-
--> { "execute": "set_password", "arguments": { "protocol": "vnc",
- "password": "secret" } }
-<- { "return": {} }
-
-expire_password
----------------
-
-Set the password expire time for vnc/spice protocols.
-
-Arguments:
-
-- "protocol": protocol name (json-string)
-- "time": [ now | never | +secs | secs ] (json-string)
-
-Example:
-
--> { "execute": "expire_password", "arguments": { "protocol": "vnc",
- "time": "+60" } }
-<- { "return": {} }
-
-add_client
-----------
-
-Add a graphics client
-
-Arguments:
-
-- "protocol": protocol name (json-string)
-- "fdname": file descriptor name (json-string)
-- "skipauth": whether to skip authentication (json-bool, optional)
-- "tls": whether to perform TLS (json-bool, optional)
-
-Example:
-
--> { "execute": "add_client", "arguments": { "protocol": "vnc",
- "fdname": "myclient" } }
-<- { "return": {} }
-
qmp_capabilities
----------------
Note: This command must be issued before issuing any other command.
-human-monitor-command
----------------------
-
-Execute a Human Monitor command.
-
-Arguments:
-
-- command-line: the command name and its arguments, just like the
- Human Monitor's shell (json-string)
-- cpu-index: select the CPU number to be used by commands which access CPU
- data, like 'info registers'. The Monitor selects CPU 0 if this
- argument is not provided (json-int, optional)
-
-Example:
-
--> { "execute": "human-monitor-command", "arguments": { "command-line": "info kvm" } }
-<- { "return": "kvm support: enabled\r\n" }
-
-Notes:
-
-(1) The Human Monitor is NOT an stable interface, this means that command
- names, arguments and responses can change or be removed at ANY time.
- Applications that rely on long term stability guarantees should NOT
- use this command
-
-(2) Limitations:
-
- o This command is stateless, this means that commands that depend
- on state information (such as getfd) might not work
-
- o Commands that prompt the user for data (eg. 'cont' when the block
- device is encrypted) don't currently work
-
3. Query Commands
=================
Example:
--> { "execute": "query-commands" }
-<- {
- "return":[
- {
- "name":"query-balloon"
- },
- {
- "name":"system_powerdown"
- }
- ]
- }
-
-Note: This example has been shortened as the real response is too long.
-
-query-events
---------------
-
-List QMP available events.
-
-Each event is represented by a json-object, the returned value is a json-array
-of all events.
-
-Each json-object contains:
-
-- "name": event's name (json-string)
-
-Example:
-
--> { "execute": "query-events" }
-<- {
- "return":[
- {
- "name":"SHUTDOWN"
- },
- {
- "name":"RESET"
- }
- ]
- }
-
-Note: This example has been shortened as the real response is too long.
-
-query-qmp-schema
-----------------
-
-Return the QMP wire schema. The returned value is a json-array of
-named schema entities. Entities are commands, events and various
-types. See docs/qapi-code-gen.txt for information on their structure
-and intended use.
-
-query-chardev
--------------
-
-Each device is represented by a json-object. The returned value is a json-array
-of all devices.
-
-Each json-object contain the following:
-
-- "label": device's label (json-string)
-- "filename": device's file (json-string)
-- "frontend-open": open/closed state of the frontend device attached to this
- backend (json-bool)
-
-Example:
-
--> { "execute": "query-chardev" }
-<- {
- "return": [
- {
- "label": "charchannel0",
- "filename": "unix:/var/lib/libvirt/qemu/seabios.rhel6.agent,server",
- "frontend-open": false
- },
- {
- "label": "charmonitor",
- "filename": "unix:/var/lib/libvirt/qemu/seabios.rhel6.monitor,server",
- "frontend-open": true
- },
- {
- "label": "charserial0",
- "filename": "pty:/dev/pts/2",
- "frontend-open": true
- }
- ]
- }
-
-query-chardev-backends
--------------
-
-List available character device backends.
-
-Each backend is represented by a json-object, the returned value is a json-array
-of all backends.
-
-Each json-object contains:
-
-- "name": backend name (json-string)
-
-Example:
-
--> { "execute": "query-chardev-backends" }
+-> { "execute": "query-commands" }
<- {
"return":[
{
- "name":"udp"
- },
- {
- "name":"tcp"
- },
- {
- "name":"unix"
+ "name":"query-balloon"
},
{
- "name":"spiceport"
+ "name":"system_powerdown"
}
]
}
+Note: This example has been shortened as the real response is too long.
+
+query-qmp-schema
+----------------
+
+Return the QMP wire schema. The returned value is a json-array of
+named schema entities. Entities are commands, events and various
+types. See docs/qapi-code-gen.txt for information on their structure
+and intended use.
+
query-block
-----------
"file", "file", "ftp", "ftps", "host_cdrom",
"host_device", "http", "https",
"nbd", "parallels", "qcow", "qcow2", "raw",
- "tftp", "vdi", "vmdk", "vpc", "vvfat"
+ "vdi", "vmdk", "vpc", "vvfat"
- "backing_file": backing file name (json-string, optional)
- "backing_file_depth": number of files in the backing file chain (json-int)
- "encrypted": true if encrypted, false otherwise (json-bool)
]
}
-query-cpus
-----------
-
-Show CPU information.
-
-Return a json-array. Each CPU is represented by a json-object, which contains:
-
-- "CPU": CPU index (json-int)
-- "current": true if this is the current CPU, false otherwise (json-bool)
-- "halted": true if the cpu is halted, false otherwise (json-bool)
-- "qom_path": path to the CPU object in the QOM tree (json-str)
-- "arch": architecture of the cpu, which determines what additional
- keys will be present (json-str)
-- Current program counter. The key's name depends on the architecture:
- "pc": i386/x86_64 (json-int)
- "nip": PPC (json-int)
- "pc" and "npc": sparc (json-int)
- "PC": mips (json-int)
-- "thread_id": ID of the underlying host thread (json-int)
-
-Example:
-
--> { "execute": "query-cpus" }
-<- {
- "return":[
- {
- "CPU":0,
- "current":true,
- "halted":false,
- "qom_path":"/machine/unattached/device[0]",
- "arch":"x86",
- "pc":3227107138,
- "thread_id":3134
- },
- {
- "CPU":1,
- "current":false,
- "halted":true,
- "qom_path":"/machine/unattached/device[2]",
- "arch":"x86",
- "pc":7108165,
- "thread_id":3135
- }
- ]
- }
-
-query-iothreads
----------------
-
-Returns a list of information about each iothread.
-
-Note this list excludes the QEMU main loop thread, which is not declared
-using the -object iothread command-line option. It is always the main thread
-of the process.
-
-Return a json-array. Each iothread is represented by a json-object, which contains:
-
-- "id": name of iothread (json-str)
-- "thread-id": ID of the underlying host thread (json-int)
-
-Example:
-
--> { "execute": "query-iothreads" }
-<- {
- "return":[
- {
- "id":"iothread0",
- "thread-id":3134
- },
- {
- "id":"iothread1",
- "thread-id":3135
- }
- ]
- }
-
-query-pci
----------
-
-PCI buses and devices information.
-
-The returned value is a json-array of all buses. Each bus is represented by
-a json-object, which has a key with a json-array of all PCI devices attached
-to it. Each device is represented by a json-object.
-
-The bus json-object contains the following:
-
-- "bus": bus number (json-int)
-- "devices": a json-array of json-objects, each json-object represents a
- PCI device
-
-The PCI device json-object contains the following:
-
-- "bus": identical to the parent's bus number (json-int)
-- "slot": slot number (json-int)
-- "function": function number (json-int)
-- "class_info": a json-object containing:
- - "desc": device class description (json-string, optional)
- - "class": device class number (json-int)
-- "id": a json-object containing:
- - "device": device ID (json-int)
- - "vendor": vendor ID (json-int)
-- "irq": device's IRQ if assigned (json-int, optional)
-- "qdev_id": qdev id string (json-string)
-- "pci_bridge": It's a json-object, only present if this device is a
- PCI bridge, contains:
- - "bus": bus number (json-int)
- - "secondary": secondary bus number (json-int)
- - "subordinate": subordinate bus number (json-int)
- - "io_range": I/O memory range information, a json-object with the
- following members:
- - "base": base address, in bytes (json-int)
- - "limit": limit address, in bytes (json-int)
- - "memory_range": memory range information, a json-object with the
- following members:
- - "base": base address, in bytes (json-int)
- - "limit": limit address, in bytes (json-int)
- - "prefetchable_range": Prefetchable memory range information, a
- json-object with the following members:
- - "base": base address, in bytes (json-int)
- - "limit": limit address, in bytes (json-int)
- - "devices": a json-array of PCI devices if there's any attached, each
- each element is represented by a json-object, which contains
- the same members of the 'PCI device json-object' described
- above (optional)
-- "regions": a json-array of json-objects, each json-object represents a
- memory region of this device
-
-The memory range json-object contains the following:
-
-- "base": base memory address (json-int)
-- "limit": limit value (json-int)
-
-The region json-object can be an I/O region or a memory region, an I/O region
-json-object contains the following:
-
-- "type": "io" (json-string, fixed)
-- "bar": BAR number (json-int)
-- "address": memory address (json-int)
-- "size": memory size (json-int)
-
-A memory region json-object contains the following:
-
-- "type": "memory" (json-string, fixed)
-- "bar": BAR number (json-int)
-- "address": memory address (json-int)
-- "size": memory size (json-int)
-- "mem_type_64": true or false (json-bool)
-- "prefetch": true or false (json-bool)
-
-Example:
-
--> { "execute": "query-pci" }
-<- {
- "return":[
- {
- "bus":0,
- "devices":[
- {
- "bus":0,
- "qdev_id":"",
- "slot":0,
- "class_info":{
- "class":1536,
- "desc":"Host bridge"
- },
- "id":{
- "device":32902,
- "vendor":4663
- },
- "function":0,
- "regions":[
-
- ]
- },
- {
- "bus":0,
- "qdev_id":"",
- "slot":1,
- "class_info":{
- "class":1537,
- "desc":"ISA bridge"
- },
- "id":{
- "device":32902,
- "vendor":28672
- },
- "function":0,
- "regions":[
-
- ]
- },
- {
- "bus":0,
- "qdev_id":"",
- "slot":1,
- "class_info":{
- "class":257,
- "desc":"IDE controller"
- },
- "id":{
- "device":32902,
- "vendor":28688
- },
- "function":1,
- "regions":[
- {
- "bar":4,
- "size":16,
- "address":49152,
- "type":"io"
- }
- ]
- },
- {
- "bus":0,
- "qdev_id":"",
- "slot":2,
- "class_info":{
- "class":768,
- "desc":"VGA controller"
- },
- "id":{
- "device":4115,
- "vendor":184
- },
- "function":0,
- "regions":[
- {
- "prefetch":true,
- "mem_type_64":false,
- "bar":0,
- "size":33554432,
- "address":4026531840,
- "type":"memory"
- },
- {
- "prefetch":false,
- "mem_type_64":false,
- "bar":1,
- "size":4096,
- "address":4060086272,
- "type":"memory"
- },
- {
- "prefetch":false,
- "mem_type_64":false,
- "bar":6,
- "size":65536,
- "address":-1,
- "type":"memory"
- }
- ]
- },
- {
- "bus":0,
- "qdev_id":"",
- "irq":11,
- "slot":4,
- "class_info":{
- "class":1280,
- "desc":"RAM controller"
- },
- "id":{
- "device":6900,
- "vendor":4098
- },
- "function":0,
- "regions":[
- {
- "bar":0,
- "size":32,
- "address":49280,
- "type":"io"
- }
- ]
- }
- ]
- }
- ]
- }
-
-Note: This example has been shortened as the real response is too long.
-
-query-kvm
----------
-
-Show KVM information.
-
-Return a json-object with the following information:
-
-- "enabled": true if KVM support is enabled, false otherwise (json-bool)
-- "present": true if QEMU has KVM support, false otherwise (json-bool)
-
-Example:
-
--> { "execute": "query-kvm" }
-<- { "return": { "enabled": true, "present": true } }
-
-query-status
-------------
-
-Return a json-object with the following information:
-
-- "running": true if the VM is running, or false if it is paused (json-bool)
-- "singlestep": true if the VM is in single step mode,
- false otherwise (json-bool)
-- "status": one of the following values (json-string)
- "debug" - QEMU is running on a debugger
- "inmigrate" - guest is paused waiting for an incoming migration
- "internal-error" - An internal error that prevents further guest
- execution has occurred
- "io-error" - the last IOP has failed and the device is configured
- to pause on I/O errors
- "paused" - guest has been paused via the 'stop' command
- "postmigrate" - guest is paused following a successful 'migrate'
- "prelaunch" - QEMU was started with -S and guest has not started
- "finish-migrate" - guest is paused to finish the migration process
- "restore-vm" - guest is paused to restore VM state
- "running" - guest is actively running
- "save-vm" - guest is paused to save the VM state
- "shutdown" - guest is shut down (and -no-shutdown is in use)
- "watchdog" - the watchdog action is configured to pause and
- has been triggered
-
-Example:
-
--> { "execute": "query-status" }
-<- { "return": { "running": true, "singlestep": false, "status": "running" } }
-
-query-mice
-----------
-
-Show VM mice information.
-
-Each mouse is represented by a json-object, the returned value is a json-array
-of all mice.
-
-The mouse json-object contains the following:
-
-- "name": mouse's name (json-string)
-- "index": mouse's index (json-int)
-- "current": true if this mouse is receiving events, false otherwise (json-bool)
-- "absolute": true if the mouse generates absolute input events (json-bool)
-
-Example:
-
--> { "execute": "query-mice" }
-<- {
- "return":[
- {
- "name":"QEMU Microsoft Mouse",
- "index":0,
- "current":false,
- "absolute":false
- },
- {
- "name":"QEMU PS/2 Mouse",
- "index":1,
- "current":true,
- "absolute":true
- }
- ]
- }
-
-query-vnc
----------
-
-Show VNC server information.
-
-Return a json-object with server information. Connected clients are returned
-as a json-array of json-objects.
-
-The main json-object contains the following:
-
-- "enabled": true or false (json-bool)
-- "host": server's IP address (json-string)
-- "family": address family (json-string)
- - Possible values: "ipv4", "ipv6", "unix", "unknown"
-- "service": server's port number (json-string)
-- "auth": authentication method (json-string)
- - Possible values: "invalid", "none", "ra2", "ra2ne", "sasl", "tight",
- "tls", "ultra", "unknown", "vencrypt", "vencrypt",
- "vencrypt+plain", "vencrypt+tls+none",
- "vencrypt+tls+plain", "vencrypt+tls+sasl",
- "vencrypt+tls+vnc", "vencrypt+x509+none",
- "vencrypt+x509+plain", "vencrypt+x509+sasl",
- "vencrypt+x509+vnc", "vnc"
-- "clients": a json-array of all connected clients
-
-Clients are described by a json-object, each one contain the following:
-
-- "host": client's IP address (json-string)
-- "family": address family (json-string)
- - Possible values: "ipv4", "ipv6", "unix", "unknown"
-- "service": client's port number (json-string)
-- "x509_dname": TLS dname (json-string, optional)
-- "sasl_username": SASL username (json-string, optional)
-
-Example:
-
--> { "execute": "query-vnc" }
-<- {
- "return":{
- "enabled":true,
- "host":"0.0.0.0",
- "service":"50402",
- "auth":"vnc",
- "family":"ipv4",
- "clients":[
- {
- "host":"127.0.0.1",
- "service":"50401",
- "family":"ipv4"
- }
- ]
- }
- }
-
-query-spice
------------
-
-Show SPICE server information.
-
-Return a json-object with server information. Connected clients are returned
-as a json-array of json-objects.
-
-The main json-object contains the following:
-
-- "enabled": true or false (json-bool)
-- "host": server's IP address (json-string)
-- "port": server's port number (json-int, optional)
-- "tls-port": server's port number (json-int, optional)
-- "auth": authentication method (json-string)
- - Possible values: "none", "spice"
-- "channels": a json-array of all active channels clients
-
-Channels are described by a json-object, each one contain the following:
-
-- "host": client's IP address (json-string)
-- "family": address family (json-string)
- - Possible values: "ipv4", "ipv6", "unix", "unknown"
-- "port": client's port number (json-string)
-- "connection-id": spice connection id. All channels with the same id
- belong to the same spice session (json-int)
-- "channel-type": channel type. "1" is the main control channel, filter for
- this one if you want track spice sessions only (json-int)
-- "channel-id": channel id. Usually "0", might be different needed when
- multiple channels of the same type exist, such as multiple
- display channels in a multihead setup (json-int)
-- "tls": whether the channel is encrypted (json-bool)
-
-Example:
-
--> { "execute": "query-spice" }
-<- {
- "return": {
- "enabled": true,
- "auth": "spice",
- "port": 5920,
- "tls-port": 5921,
- "host": "0.0.0.0",
- "channels": [
- {
- "port": "54924",
- "family": "ipv4",
- "channel-type": 1,
- "connection-id": 1804289383,
- "host": "127.0.0.1",
- "channel-id": 0,
- "tls": true
- },
- {
- "port": "36710",
- "family": "ipv4",
- "channel-type": 4,
- "connection-id": 1804289383,
- "host": "127.0.0.1",
- "channel-id": 0,
- "tls": false
- },
- [ ... more channels follow ... ]
- ]
- }
- }
-
-query-name
-----------
-
-Show VM name.
-
-Return a json-object with the following information:
-
-- "name": VM's name (json-string, optional)
-
-Example:
-
--> { "execute": "query-name" }
-<- { "return": { "name": "qemu-name" } }
-
-query-uuid
-----------
-
-Show VM UUID.
-
-Return a json-object with the following information:
-
-- "UUID": Universally Unique Identifier (json-string)
-
-Example:
-
--> { "execute": "query-uuid" }
-<- { "return": { "UUID": "550e8400-e29b-41d4-a716-446655440000" } }
-
query-command-line-options
--------------------------
]
}
-query-migrate
--------------
-
-Migration status.
-
-Return a json-object. If migration is active there will be another json-object
-with RAM migration status and if block migration is active another one with
-block migration status.
-
-The main json-object contains the following:
-
-- "status": migration status (json-string)
- - Possible values: "setup", "active", "completed", "failed", "cancelled"
-- "total-time": total amount of ms since migration started. If
- migration has ended, it returns the total migration
- time (json-int)
-- "setup-time" amount of setup time in milliseconds _before_ the
- iterations begin but _after_ the QMP command is issued.
- This is designed to provide an accounting of any activities
- (such as RDMA pinning) which may be expensive, but do not
- actually occur during the iterative migration rounds
- themselves. (json-int)
-- "downtime": only present when migration has finished correctly
- total amount in ms for downtime that happened (json-int)
-- "expected-downtime": only present while migration is active
- total amount in ms for downtime that was calculated on
- the last bitmap round (json-int)
-- "ram": only present if "status" is "active", it is a json-object with the
- following RAM information:
- - "transferred": amount transferred in bytes (json-int)
- - "remaining": amount remaining to transfer in bytes (json-int)
- - "total": total amount of memory in bytes (json-int)
- - "duplicate": number of pages filled entirely with the same
- byte (json-int)
- These are sent over the wire much more efficiently.
- - "skipped": number of skipped zero pages (json-int)
- - "normal" : number of whole pages transferred. I.e. they
- were not sent as duplicate or xbzrle pages (json-int)
- - "normal-bytes" : number of bytes transferred in whole
- pages. This is just normal pages times size of one page,
- but this way upper levels don't need to care about page
- size (json-int)
- - "dirty-sync-count": times that dirty ram was synchronized (json-int)
-- "disk": only present if "status" is "active" and it is a block migration,
- it is a json-object with the following disk information:
- - "transferred": amount transferred in bytes (json-int)
- - "remaining": amount remaining to transfer in bytes json-int)
- - "total": total disk size in bytes (json-int)
-- "xbzrle-cache": only present if XBZRLE is active.
- It is a json-object with the following XBZRLE information:
- - "cache-size": XBZRLE cache size in bytes
- - "bytes": number of bytes transferred for XBZRLE compressed pages
- - "pages": number of XBZRLE compressed pages
- - "cache-miss": number of XBRZRLE page cache misses
- - "cache-miss-rate": rate of XBRZRLE page cache misses
- - "overflow": number of times XBZRLE overflows. This means
- that the XBZRLE encoding was bigger than just sent the
- whole page, and then we sent the whole page instead (as as
- normal page).
-
-Examples:
-
-1. Before the first migration
-
--> { "execute": "query-migrate" }
-<- { "return": {} }
-
-2. Migration is done and has succeeded
-
--> { "execute": "query-migrate" }
-<- { "return": {
- "status": "completed",
- "ram":{
- "transferred":123,
- "remaining":123,
- "total":246,
- "total-time":12345,
- "setup-time":12345,
- "downtime":12345,
- "duplicate":123,
- "normal":123,
- "normal-bytes":123456,
- "dirty-sync-count":15
- }
- }
- }
-
-3. Migration is done and has failed
-
--> { "execute": "query-migrate" }
-<- { "return": { "status": "failed" } }
-
-4. Migration is being performed and is not a block migration:
-
--> { "execute": "query-migrate" }
-<- {
- "return":{
- "status":"active",
- "ram":{
- "transferred":123,
- "remaining":123,
- "total":246,
- "total-time":12345,
- "setup-time":12345,
- "expected-downtime":12345,
- "duplicate":123,
- "normal":123,
- "normal-bytes":123456,
- "dirty-sync-count":15
- }
- }
- }
-
-5. Migration is being performed and is a block migration:
-
--> { "execute": "query-migrate" }
-<- {
- "return":{
- "status":"active",
- "ram":{
- "total":1057024,
- "remaining":1053304,
- "transferred":3720,
- "total-time":12345,
- "setup-time":12345,
- "expected-downtime":12345,
- "duplicate":123,
- "normal":123,
- "normal-bytes":123456,
- "dirty-sync-count":15
- },
- "disk":{
- "total":20971520,
- "remaining":20880384,
- "transferred":91136
- }
- }
- }
-
-6. Migration is being performed and XBZRLE is active:
-
--> { "execute": "query-migrate" }
-<- {
- "return":{
- "status":"active",
- "capabilities" : [ { "capability": "xbzrle", "state" : true } ],
- "ram":{
- "total":1057024,
- "remaining":1053304,
- "transferred":3720,
- "total-time":12345,
- "setup-time":12345,
- "expected-downtime":12345,
- "duplicate":10,
- "normal":3333,
- "normal-bytes":3412992,
- "dirty-sync-count":15
- },
- "xbzrle-cache":{
- "cache-size":67108864,
- "bytes":20971520,
- "pages":2444343,
- "cache-miss":2244,
- "cache-miss-rate":0.123,
- "overflow":34434
- }
- }
- }
-
-migrate-set-capabilities
-------------------------
-
-Enable/Disable migration capabilities
-
-- "xbzrle": XBZRLE support
-- "rdma-pin-all": pin all pages when using RDMA during migration
-- "auto-converge": throttle down guest to help convergence of migration
-- "zero-blocks": compress zero blocks during block migration
-- "compress": use multiple compression threads to accelerate live migration
-- "events": generate events for each migration state change
-- "postcopy-ram": postcopy mode for live migration
-
-Arguments:
-
-Example:
-
--> { "execute": "migrate-set-capabilities" , "arguments":
- { "capabilities": [ { "capability": "xbzrle", "state": true } ] } }
-
-query-migrate-capabilities
---------------------------
-
-Query current migration capabilities
-
-- "capabilities": migration capabilities state
- - "xbzrle" : XBZRLE state (json-bool)
- - "rdma-pin-all" : RDMA Pin Page state (json-bool)
- - "auto-converge" : Auto Converge state (json-bool)
- - "zero-blocks" : Zero Blocks state (json-bool)
- - "compress": Multiple compression threads state (json-bool)
- - "events": Migration state change event state (json-bool)
- - "postcopy-ram": postcopy ram state (json-bool)
-
-Arguments:
-
-Example:
-
--> { "execute": "query-migrate-capabilities" }
-<- {"return": [
- {"state": false, "capability": "xbzrle"},
- {"state": false, "capability": "rdma-pin-all"},
- {"state": false, "capability": "auto-converge"},
- {"state": false, "capability": "zero-blocks"},
- {"state": false, "capability": "compress"},
- {"state": true, "capability": "events"},
- {"state": false, "capability": "postcopy-ram"}
- ]}
-
-migrate-set-parameters
-----------------------
-
-Set migration parameters
-
-- "compress-level": set compression level during migration (json-int)
-- "compress-threads": set compression thread count for migration (json-int)
-- "decompress-threads": set decompression thread count for migration (json-int)
-- "cpu-throttle-initial": set initial percentage of time guest cpus are
- throttled for auto-converge (json-int)
-- "cpu-throttle-increment": set throttle increasing percentage for
- auto-converge (json-int)
-
-Arguments:
-
-Example:
-
--> { "execute": "migrate-set-parameters" , "arguments":
- { "compress-level": 1 } }
-
-query-migrate-parameters
-------------------------
-
-Query current migration parameters
-
-- "parameters": migration parameters value
- - "compress-level" : compression level value (json-int)
- - "compress-threads" : compression thread count value (json-int)
- - "decompress-threads" : decompression thread count value (json-int)
- - "cpu-throttle-initial" : initial percentage of time guest cpus are
- throttled (json-int)
- - "cpu-throttle-increment" : throttle increasing percentage for
- auto-converge (json-int)
-
-Arguments:
-
-Example:
-
--> { "execute": "query-migrate-parameters" }
-<- {
- "return": {
- "decompress-threads": 2,
- "cpu-throttle-increment": 10,
- "compress-threads": 8,
- "compress-level": 1,
- "cpu-throttle-initial": 20
- }
- }
-
-query-balloon
--------------
-
-Show balloon information.
-
-Make an asynchronous request for balloon info. When the request completes a
-json-object will be returned containing the following data:
-
-- "actual": current balloon value in bytes (json-int)
-
-Example:
-
--> { "execute": "query-balloon" }
-<- {
- "return":{
- "actual":1073741824,
- }
- }
-
query-tpm
---------
block drivers among other things. Stay away from it unless you want
to help with its development.
-Arguments:
-
-- "options": block driver options
+For the arguments, see the QAPI schema documentation of BlockdevOptions.
Example (1):
-> { "execute": "blockdev-add",
- "arguments": { "options" : { "driver": "qcow2",
- "file": { "driver": "file",
- "filename": "test.qcow2" } } } }
+ "arguments": { "driver": "qcow2",
+ "file": { "driver": "file",
+ "filename": "test.qcow2" } } }
<- { "return": {} }
Example (2):
-> { "execute": "blockdev-add",
"arguments": {
- "options": {
- "driver": "qcow2",
- "node-name": "my_disk",
- "discard": "unmap",
- "cache": {
- "direct": true,
- "writeback": true
- },
- "file": {
- "driver": "file",
- "filename": "/tmp/test.qcow2"
- },
- "backing": {
- "driver": "raw",
- "file": {
- "driver": "file",
- "filename": "/dev/fdset/4"
- }
- }
+ "driver": "qcow2",
+ "node-name": "my_disk",
+ "discard": "unmap",
+ "cache": {
+ "direct": true,
+ "writeback": true
+ },
+ "file": {
+ "driver": "file",
+ "filename": "/tmp/test.qcow2"
+ },
+ "backing": {
+ "driver": "raw",
+ "file": {
+ "driver": "file",
+ "filename": "/dev/fdset/4"
+ }
}
}
}
-> { "execute": "blockdev-add",
"arguments": {
- "options": {
- "driver": "qcow2",
- "node-name": "node0",
- "file": {
- "driver": "file",
- "filename": "test.qcow2"
- }
+ "driver": "qcow2",
+ "node-name": "node0",
+ "file": {
+ "driver": "file",
+ "filename": "test.qcow2"
}
}
}
"microseconds": 716996 },
"event": "DEVICE_TRAY_MOVED",
"data": { "device": "ide1-cd0",
+ "id": "ide0-1-0",
"tray-open": true } }
<- { "return": {} }
"microseconds": 272147 },
"event": "DEVICE_TRAY_MOVED",
"data": { "device": "ide1-cd0",
+ "id": "ide0-1-0",
"tray-open": false } }
<- { "return": {} }
"microseconds": 549958 },
"event": "DEVICE_TRAY_MOVED",
"data": { "device": "ide1-cd0",
+ "id": "ide0-1-0",
"tray-open": true } }
<- { "return": {} }
Example:
-> { "execute": "blockdev-add",
- "arguments": { "options": { "node-name": "node0",
- "driver": "raw",
- "file": { "driver": "file",
- "filename": "fedora.iso" } } } }
+ "arguments": { { "node-name": "node0",
+ "driver": "raw",
+ "file": { "driver": "file",
+ "filename": "fedora.iso" } } }
<- { "return": {} }
Add a new node to a quorum
-> { "execute": "blockdev-add",
- "arguments": { "options": { "driver": "raw",
- "node-name": "new_node",
- "file": { "driver": "file",
- "filename": "test.raw" } } } }
+ "arguments": { "driver": "raw",
+ "node-name": "new_node",
+ "file": { "driver": "file",
+ "filename": "test.raw" } } }
<- { "return": {} }
-> { "execute": "x-blockdev-change",
"arguments": { "parent": "disk1",
"policy": "bind"
},
{
+ "id": "mem1",
"size": 536870912,
"merge": false,
"dump": true,
projects / qemu.git / blobdiff