stream: Allow users to request only format driver names in backing file format

[mirror_qemu.git] / qapi / run-state.json

# -*- Mode: Python -*-
# vim: filetype=python
#

##
# = VM run state
##

##
# @RunState:
#
# An enumeration of VM run states.
#
# @debug: QEMU is running on a debugger
#
# @finish-migrate: guest is paused to finish the migration process
#
# @inmigrate: guest is paused waiting for an incoming migration.  Note
#     that this state does not tell whether the machine will start at
#     the end of the migration.  This depends on the command-line -S
#     option and any invocation of 'stop' or 'cont' that has happened
#     since QEMU was started.
#
# @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
#
# @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)
#
# @suspended: guest is suspended (ACPI S3)
#
# @watchdog: the watchdog action is configured to pause and has been
#     triggered
#
# @guest-panicked: guest has been panicked as a result of guest OS
#     panic
#
# @colo: guest is paused to save/restore VM state under colo
#     checkpoint, VM can not get into this state unless colo
#     capability is enabled for migration.  (since 2.8)
##
{ 'enum': 'RunState',
  'data': [ 'debug', 'inmigrate', 'internal-error', 'io-error', 'paused',
            'postmigrate', 'prelaunch', 'finish-migrate', 'restore-vm',
            'running', 'save-vm', 'shutdown', 'suspended', 'watchdog',
            'guest-panicked', 'colo' ] }

##
# @ShutdownCause:
#
# An enumeration of reasons for a Shutdown.
#
# @none: No shutdown request pending
#
# @host-error: An error prevents further use of guest
#
# @host-qmp-quit: Reaction to the QMP command 'quit'
#
# @host-qmp-system-reset: Reaction to the QMP command 'system_reset'
#
# @host-signal: Reaction to a signal, such as SIGINT
#
# @host-ui: Reaction to a UI event, like window close
#
# @guest-shutdown: Guest shutdown/suspend request, via ACPI or other
#     hardware-specific means
#
# @guest-reset: Guest reset request, and command line turns that into
#     a shutdown
#
# @guest-panic: Guest panicked, and command line turns that into a
#     shutdown
#
# @subsystem-reset: Partial guest reset that does not trigger QMP
#     events and ignores --no-reboot.  This is useful for sanitizing
#     hypercalls on s390 that are used during kexec/kdump/boot
#
# @snapshot-load: A snapshot is being loaded by the record & replay
#     subsystem.  This value is used only within QEMU.  It doesn't
#     occur in QMP. (since 7.2)
##
{ 'enum': 'ShutdownCause',
  # Beware, shutdown_caused_by_guest() depends on enumeration order
  'data': [ 'none', 'host-error', 'host-qmp-quit', 'host-qmp-system-reset',
            'host-signal', 'host-ui', 'guest-shutdown', 'guest-reset',
            'guest-panic', 'subsystem-reset', 'snapshot-load'] }

##
# @StatusInfo:
#
# Information about VM run state
#
# @running: true if all VCPUs are runnable, false if not runnable
#
# @status: the virtual machine @RunState
#
# Features:
#
# Since: 0.14
#
##
{ 'struct': 'StatusInfo',
  'data': {'running': 'bool',
           'status': 'RunState'} }

##
# @query-status:
#
# Query the run status of the VM
#
# Returns: @StatusInfo reflecting the VM
#
# Since: 0.14
#
# Example:
#
# -> { "execute": "query-status" }
# <- { "return": { "running": true,
#                  "status": "running" } }
##
{ 'command': 'query-status', 'returns': 'StatusInfo',
  'allow-preconfig': true }

##
# @SHUTDOWN:
#
# Emitted when the virtual machine has shut down, indicating that qemu
# is about to exit.
#
# @guest: If true, the shutdown was triggered by a guest request (such
#     as a guest-initiated ACPI shutdown request or other
#     hardware-specific action) rather than a host request (such as
#     sending qemu a SIGINT). (since 2.10)
#
# @reason: The @ShutdownCause which resulted in the SHUTDOWN. (since
#     4.0)
#
# Note: If the command-line option "-no-shutdown" has been specified,
#     qemu will not exit, and a STOP event will eventually follow the
#     SHUTDOWN event
#
# Since: 0.12
#
# Example:
#
# <- { "event": "SHUTDOWN",
#      "data": { "guest": true, "reason": "guest-shutdown" },
#      "timestamp": { "seconds": 1267040730, "microseconds": 682951 } }
##
{ 'event': 'SHUTDOWN', 'data': { 'guest': 'bool', 'reason': 'ShutdownCause' } }

##
# @POWERDOWN:
#
# Emitted when the virtual machine is powered down through the power
# control system, such as via ACPI.
#
# Since: 0.12
#
# Example:
#
# <- { "event": "POWERDOWN",
#      "timestamp": { "seconds": 1267040730, "microseconds": 682951 } }
##
{ 'event': 'POWERDOWN' }

##
# @RESET:
#
# Emitted when the virtual machine is reset
#
# @guest: If true, the reset was triggered by a guest request (such as
#     a guest-initiated ACPI reboot request or other hardware-specific
#     action) rather than a host request (such as the QMP command
#     system_reset). (since 2.10)
#
# @reason: The @ShutdownCause of the RESET. (since 4.0)
#
# Since: 0.12
#
# Example:
#
# <- { "event": "RESET",
#      "data": { "guest": false, "reason": "guest-reset" },
#      "timestamp": { "seconds": 1267041653, "microseconds": 9518 } }
##
{ 'event': 'RESET', 'data': { 'guest': 'bool', 'reason': 'ShutdownCause' } }

##
# @STOP:
#
# Emitted when the virtual machine is stopped
#
# Since: 0.12
#
# Example:
#
# <- { "event": "STOP",
#      "timestamp": { "seconds": 1267041730, "microseconds": 281295 } }
##
{ 'event': 'STOP' }

##
# @RESUME:
#
# Emitted when the virtual machine resumes execution
#
# Since: 0.12
#
# Example:
#
# <- { "event": "RESUME",
#      "timestamp": { "seconds": 1271770767, "microseconds": 582542 } }
##
{ 'event': 'RESUME' }

##
# @SUSPEND:
#
# Emitted when guest enters a hardware suspension state, for example,
# S3 state, which is sometimes called standby state
#
# Since: 1.1
#
# Example:
#
# <- { "event": "SUSPEND",
#      "timestamp": { "seconds": 1344456160, "microseconds": 309119 } }
##
{ 'event': 'SUSPEND' }

##
# @SUSPEND_DISK:
#
# Emitted when guest enters a hardware suspension state with data
# saved on disk, for example, S4 state, which is sometimes called
# hibernate state
#
# Note: QEMU shuts down (similar to event @SHUTDOWN) when entering
#     this state
#
# Since: 1.2
#
# Example:
#
# <- { "event": "SUSPEND_DISK",
#      "timestamp": { "seconds": 1344456160, "microseconds": 309119 } }
##
{ 'event': 'SUSPEND_DISK' }

##
# @WAKEUP:
#
# Emitted when the guest has woken up from suspend state and is
# running
#
# Since: 1.1
#
# Example:
#
# <- { "event": "WAKEUP",
#      "timestamp": { "seconds": 1344522075, "microseconds": 745528 } }
##
{ 'event': 'WAKEUP' }

##
# @WATCHDOG:
#
# Emitted when the watchdog device's timer is expired
#
# @action: action that has been taken
#
# Note: If action is "reset", "shutdown", or "pause" the WATCHDOG
#     event is followed respectively by the RESET, SHUTDOWN, or STOP
#     events
#
# Note: This event is rate-limited.
#
# Since: 0.13
#
# Example:
#
# <- { "event": "WATCHDOG",
#      "data": { "action": "reset" },
#      "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }
##
{ 'event': 'WATCHDOG',
  'data': { 'action': 'WatchdogAction' } }

##
# @WatchdogAction:
#
# An enumeration of the actions taken when the watchdog device's timer
# is expired
#
# @reset: system resets
#
# @shutdown: system shutdown, note that it is similar to @powerdown,
#     which tries to set to system status and notify guest
#
# @poweroff: system poweroff, the emulator program exits
#
# @pause: system pauses, similar to @stop
#
# @debug: system enters debug state
#
# @none: nothing is done
#
# @inject-nmi: a non-maskable interrupt is injected into the first
#     VCPU (all VCPUS on x86) (since 2.4)
#
# Since: 2.1
##
{ 'enum': 'WatchdogAction',
  'data': [ 'reset', 'shutdown', 'poweroff', 'pause', 'debug', 'none',
            'inject-nmi' ] }

##
# @RebootAction:
#
# Possible QEMU actions upon guest reboot
#
# @reset: Reset the VM
#
# @shutdown: Shutdown the VM and exit, according to the shutdown
#     action
#
# Since: 6.0
##
{ 'enum': 'RebootAction',
  'data': [ 'reset', 'shutdown' ] }

##
# @ShutdownAction:
#
# Possible QEMU actions upon guest shutdown
#
# @poweroff: Shutdown the VM and exit
#
# @pause: pause the VM
#
# Since: 6.0
##
{ 'enum': 'ShutdownAction',
  'data': [ 'poweroff', 'pause' ] }

##
# @PanicAction:
#
# @none: Continue VM execution
#
# @pause: Pause the VM
#
# @shutdown: Shutdown the VM and exit, according to the shutdown
#     action
#
# @exit-failure: Shutdown the VM and exit with nonzero status (since
#     7.1)
#
# Since: 6.0
##
{ 'enum': 'PanicAction',
  'data': [ 'pause', 'shutdown', 'exit-failure', 'none' ] }

##
# @watchdog-set-action:
#
# Set watchdog action
#
# Since: 2.11
##
{ 'command': 'watchdog-set-action', 'data' : {'action': 'WatchdogAction'} }

##
# @set-action:
#
# Set the actions that will be taken by the emulator in response to
# guest events.
#
# @reboot: @RebootAction action taken on guest reboot.
#
# @shutdown: @ShutdownAction action taken on guest shutdown.
#
# @panic: @PanicAction action taken on guest panic.
#
# @watchdog: @WatchdogAction action taken when watchdog timer expires
#     .
#
# Returns: Nothing on success.
#
# Since: 6.0
#
# Example:
#
# -> { "execute": "set-action",
#      "arguments": { "reboot": "shutdown",
#                     "shutdown" : "pause",
#                     "panic": "pause",
#                     "watchdog": "inject-nmi" } }
# <- { "return": {} }
##
{ 'command': 'set-action',
  'data': { '*reboot': 'RebootAction',
            '*shutdown': 'ShutdownAction',
            '*panic': 'PanicAction',
            '*watchdog': 'WatchdogAction' },
  'allow-preconfig': true }

##
# @GUEST_PANICKED:
#
# Emitted when guest OS panic is detected
#
# @action: action that has been taken, currently always "pause"
#
# @info: information about a panic (since 2.9)
#
# Since: 1.5
#
# Example:
#
# <- { "event": "GUEST_PANICKED",
#      "data": { "action": "pause" },
#      "timestamp": { "seconds": 1648245231, "microseconds": 900001 } }
##
{ 'event': 'GUEST_PANICKED',
  'data': { 'action': 'GuestPanicAction', '*info': 'GuestPanicInformation' } }

##
# @GUEST_CRASHLOADED:
#
# Emitted when guest OS crash loaded is detected
#
# @action: action that has been taken, currently always "run"
#
# @info: information about a panic
#
# Since: 5.0
#
# Example:
#
# <- { "event": "GUEST_CRASHLOADED",
#      "data": { "action": "run" },
#      "timestamp": { "seconds": 1648245259, "microseconds": 893771 } }
##
{ 'event': 'GUEST_CRASHLOADED',
  'data': { 'action': 'GuestPanicAction', '*info': 'GuestPanicInformation' } }

##
# @GuestPanicAction:
#
# An enumeration of the actions taken when guest OS panic is detected
#
# @pause: system pauses
#
# @poweroff: system powers off (since 2.8)
#
# @run: system continues to run (since 5.0)
#
# Since: 2.1
##
{ 'enum': 'GuestPanicAction',
  'data': [ 'pause', 'poweroff', 'run' ] }

##
# @GuestPanicInformationType:
#
# An enumeration of the guest panic information types
#
# @hyper-v: hyper-v guest panic information type
#
# @s390: s390 guest panic information type (Since: 2.12)
#
# Since: 2.9
##
{ 'enum': 'GuestPanicInformationType',
  'data': [ 'hyper-v', 's390' ] }

##
# @GuestPanicInformation:
#
# Information about a guest panic
#
# @type: Crash type that defines the hypervisor specific information
#
# Since: 2.9
##
{'union': 'GuestPanicInformation',
 'base': {'type': 'GuestPanicInformationType'},
 'discriminator': 'type',
 'data': {'hyper-v': 'GuestPanicInformationHyperV',
          's390': 'GuestPanicInformationS390'}}

##
# @GuestPanicInformationHyperV:
#
# Hyper-V specific guest panic information (HV crash MSRs)
#
# Since: 2.9
##
{'struct': 'GuestPanicInformationHyperV',
 'data': {'arg1': 'uint64',
          'arg2': 'uint64',
          'arg3': 'uint64',
          'arg4': 'uint64',
          'arg5': 'uint64'}}

##
# @S390CrashReason:
#
# Reason why the CPU is in a crashed state.
#
# @unknown: no crash reason was set
#
# @disabled-wait: the CPU has entered a disabled wait state
#
# @extint-loop: clock comparator or cpu timer interrupt with new PSW
#     enabled for external interrupts
#
# @pgmint-loop: program interrupt with BAD new PSW
#
# @opint-loop: operation exception interrupt with invalid code at the
#     program interrupt new PSW
#
# Since: 2.12
##
{ 'enum': 'S390CrashReason',
  'data': [ 'unknown',
            'disabled-wait',
            'extint-loop',
            'pgmint-loop',
            'opint-loop' ] }

##
# @GuestPanicInformationS390:
#
# S390 specific guest panic information (PSW)
#
# @core: core id of the CPU that crashed
#
# @psw-mask: control fields of guest PSW
#
# @psw-addr: guest instruction address
#
# @reason: guest crash reason
#
# Since: 2.12
##
{'struct': 'GuestPanicInformationS390',
 'data': {'core': 'uint32',
          'psw-mask': 'uint64',
          'psw-addr': 'uint64',
          'reason': 'S390CrashReason'}}

##
# @MEMORY_FAILURE:
#
# Emitted when a memory failure occurs on host side.
#
# @recipient: recipient is defined as @MemoryFailureRecipient.
#
# @action: action that has been taken.  action is defined as
#     @MemoryFailureAction.
#
# @flags: flags for MemoryFailureAction.  action is defined as
#     @MemoryFailureFlags.
#
# Since: 5.2
#
# Example:
#
# <- { "event": "MEMORY_FAILURE",
#      "data": { "recipient": "hypervisor",
#                "action": "fatal",
#                "flags": { "action-required": false,
#                           "recursive": false } },
#      "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }
##
{ 'event': 'MEMORY_FAILURE',
  'data': { 'recipient': 'MemoryFailureRecipient',
            'action': 'MemoryFailureAction',
            'flags': 'MemoryFailureFlags'} }

##
# @MemoryFailureRecipient:
#
# Hardware memory failure occurs, handled by recipient.
#
# @hypervisor: memory failure at QEMU process address space.  (none
#     guest memory, but used by QEMU itself).
#
# @guest: memory failure at guest memory,
#
# Since: 5.2
##
{ 'enum': 'MemoryFailureRecipient',
  'data': [ 'hypervisor',
            'guest' ] }

##
# @MemoryFailureAction:
#
# Actions taken by QEMU in response to a hardware memory failure.
#
# @ignore: the memory failure could be ignored.  This will only be the
#     case for action-optional failures.
#
# @inject: memory failure occurred in guest memory, the guest enabled
#     MCE handling mechanism, and QEMU could inject the MCE into the
#     guest successfully.
#
# @fatal: the failure is unrecoverable.  This occurs for
#     action-required failures if the recipient is the hypervisor;
#     QEMU will exit.
#
# @reset: the failure is unrecoverable but confined to the guest.
#     This occurs if the recipient is a guest guest which is not ready
#     to handle memory failures.
#
# Since: 5.2
##
{ 'enum': 'MemoryFailureAction',
  'data': [ 'ignore',
            'inject',
            'fatal',
            'reset' ] }

##
# @MemoryFailureFlags:
#
# Additional information on memory failures.
#
# @action-required: whether a memory failure event is action-required
#     or action-optional (e.g. a failure during memory scrub).
#
# @recursive: whether the failure occurred while the previous failure
#     was still in progress.
#
# Since: 5.2
##
{ 'struct': 'MemoryFailureFlags',
  'data': { 'action-required': 'bool',
            'recursive': 'bool'} }

##
# @NotifyVmexitOption:
#
# An enumeration of the options specified when enabling notify VM exit
#
# @run: enable the feature, do nothing and continue if the notify VM
#     exit happens.
#
# @internal-error: enable the feature, raise a internal error if the
#     notify VM exit happens.
#
# @disable: disable the feature.
#
# Since: 7.2
##
{ 'enum': 'NotifyVmexitOption',
  'data': [ 'run', 'internal-error', 'disable' ] }