qapi/machine-target.json - qemu - Git at Google

 # -*- Mode: Python -*-
 # vim: filetype=python
 #
 # This work is licensed under the terms of the GNU GPL, version 2 or later.
 # See the COPYING file in the top-level directory.

 { 'include': 'machine-common.json' }

 ##
 # @CpuModelInfo:
 #
 # Virtual CPU model.
 #
 # A CPU model consists of the name of a CPU definition, to which delta
 # changes are applied (e.g. features added/removed). Most magic values
 # that an architecture might require should be hidden behind the name.
 # However, if required, architectures can expose relevant properties.
 #
 # @name: the name of the CPU definition the model is based on
 #
 # @props: a dictionary of QOM properties to be applied
 #
 # Since: 2.8
 ##
 { 'struct': 'CpuModelInfo',
   'data': { 'name': 'str',
             '*props': 'any' } }

 ##
 # @CpuModelExpansionType:
 #
 # An enumeration of CPU model expansion types.
 #
 # @static: Expand to a static CPU model, a combination of a static
 #     base model name and property delta changes.  As the static base
 #     model will never change, the expanded CPU model will be the
 #     same, independent of QEMU version, machine type, machine
 #     options, and accelerator options.  Therefore, the resulting
 #     model can be used by tooling without having to specify a
 #     compatibility machine - e.g. when displaying the "host" model.
 #     The @static CPU models are migration-safe.
 #
 # @full: Expand all properties.  The produced model is not guaranteed
 #     to be migration-safe, but allows tooling to get an insight and
 #     work with model details.
 #
 # Note: When a non-migration-safe CPU model is expanded in static
 #     mode, some features enabled by the CPU model may be omitted,
 #     because they can't be implemented by a static CPU model
 #     definition (e.g. cache info passthrough and PMU passthrough in
 #     x86). If you need an accurate representation of the features
 #     enabled by a non-migration-safe CPU model, use @full.  If you
 #     need a static representation that will keep ABI compatibility
 #     even when changing QEMU version or machine-type, use @static
 #     (but keep in mind that some features may be omitted).
 #
 # Since: 2.8
 ##
 { 'enum': 'CpuModelExpansionType',
   'data': [ 'static', 'full' ] }

 ##
 # @CpuModelCompareResult:
 #
 # An enumeration of CPU model comparison results.  The result is
 # usually calculated using e.g. CPU features or CPU generations.
 #
 # @incompatible: If model A is incompatible to model B, model A is not
 #     guaranteed to run where model B runs and the other way around.
 #
 # @identical: If model A is identical to model B, model A is
 #     guaranteed to run where model B runs and the other way around.
 #
 # @superset: If model A is a superset of model B, model B is
 #     guaranteed to run where model A runs.  There are no guarantees
 #     about the other way.
 #
 # @subset: If model A is a subset of model B, model A is guaranteed to
 #     run where model B runs.  There are no guarantees about the other
 #     way.
 #
 # Since: 2.8
 ##
 { 'enum': 'CpuModelCompareResult',
   'data': [ 'incompatible', 'identical', 'superset', 'subset' ] }

 ##
 # @CpuModelBaselineInfo:
 #
 # The result of a CPU model baseline.
 #
 # @model: the baselined CpuModelInfo.
 #
 # Since: 2.8
 ##
 { 'struct': 'CpuModelBaselineInfo',
   'data': { 'model': 'CpuModelInfo' },
   'if': 'TARGET_S390X' }

 ##
 # @CpuModelCompareInfo:
 #
 # The result of a CPU model comparison.
 #
 # @result: The result of the compare operation.
 #
 # @responsible-properties: List of properties that led to the
 #     comparison result not being identical.
 #
 # @responsible-properties is a list of QOM property names that led to
 # both CPUs not being detected as identical.  For identical models,
 # this list is empty.  If a QOM property is read-only, that means
 # there's no known way to make the CPU models identical.  If the
 # special property name "type" is included, the models are by
 # definition not identical and cannot be made identical.
 #
 # Since: 2.8
 ##
 { 'struct': 'CpuModelCompareInfo',
   'data': { 'result': 'CpuModelCompareResult',
             'responsible-properties': ['str'] },
   'if': 'TARGET_S390X' }

 ##
 # @query-cpu-model-comparison:
 #
 # Compares two CPU models, @modela and @modelb, returning how they
 # compare in a specific configuration.  The results indicates how
 # both models compare regarding runnability.  This result can be
 # used by tooling to make decisions if a certain CPU model will
 # run in a certain configuration or if a compatible CPU model has
 # to be created by baselining.
 #
 # Usually, a CPU model is compared against the maximum possible CPU
 # model of a certain configuration (e.g. the "host" model for KVM).
 # If that CPU model is identical or a subset, it will run in that
 # configuration.
 #
 # The result returned by this command may be affected by:
 #
 # * QEMU version: CPU models may look different depending on the QEMU
 #   version.  (Except for CPU models reported as "static" in
 #   query-cpu-definitions.)
 # * machine-type: CPU model may look different depending on the
 #   machine-type.  (Except for CPU models reported as "static" in
 #   query-cpu-definitions.)
 # * machine options (including accelerator): in some architectures,
 #   CPU models may look different depending on machine and accelerator
 #   options.  (Except for CPU models reported as "static" in
 #   query-cpu-definitions.)
 # * "-cpu" arguments and global properties: arguments to the -cpu
 #   option and global properties may affect expansion of CPU models.
 #   Using query-cpu-model-expansion while using these is not advised.
 #
 # Some architectures may not support comparing CPU models.  s390x
 # supports comparing CPU models.
 #
 # @modela: description of the first CPU model to compare, referred to as
 #     "model A" in CpuModelCompareResult
 #
 # @modelb: description of the second CPU model to compare, referred to as
 #     "model B" in CpuModelCompareResult
 #
 # Returns: a CpuModelCompareInfo describing how both CPU models
 #     compare
 #
 # Errors:
 #     - if comparing CPU models is not supported
 #     - if a model cannot be used
 #     - if a model contains an unknown cpu definition name, unknown
 #       properties or properties with wrong types.
 #
 # Note: this command isn't specific to s390x, but is only implemented
 #     on this architecture currently.
 #
 # Since: 2.8
 ##
 { 'command': 'query-cpu-model-comparison',
   'data': { 'modela': 'CpuModelInfo', 'modelb': 'CpuModelInfo' },
   'returns': 'CpuModelCompareInfo',
   'if': 'TARGET_S390X' }

 ##
 # @query-cpu-model-baseline:
 #
 # Baseline two CPU models, @modela and @modelb, creating a compatible
 # third model.  The created model will always be a static,
 # migration-safe CPU model (see "static" CPU model expansion for details).
 #
 # This interface can be used by tooling to create a compatible CPU
 # model out two CPU models.  The created CPU model will be identical
 # to or a subset of both CPU models when comparing them.  Therefore,
 # the created CPU model is guaranteed to run where the given CPU
 # models run.
 #
 # The result returned by this command may be affected by:
 #
 # * QEMU version: CPU models may look different depending on the QEMU
 #   version.  (Except for CPU models reported as "static" in
 #   query-cpu-definitions.)
 # * machine-type: CPU model may look different depending on the
 #   machine-type.  (Except for CPU models reported as "static" in
 #   query-cpu-definitions.)
 # * machine options (including accelerator): in some architectures,
 #   CPU models may look different depending on machine and accelerator
 #   options.  (Except for CPU models reported as "static" in
 #   query-cpu-definitions.)
 # * "-cpu" arguments and global properties: arguments to the -cpu
 #   option and global properties may affect expansion of CPU models.
 #   Using query-cpu-model-expansion while using these is not advised.
 #
 # Some architectures may not support baselining CPU models.  s390x
 # supports baselining CPU models.
 #
 # @modela: description of the first CPU model to baseline
 #
 # @modelb: description of the second CPU model to baseline
 #
 # Returns: a CpuModelBaselineInfo describing the baselined CPU model
 #
 # Errors:
 #     - if baselining CPU models is not supported
 #     - if a model cannot be used
 #     - if a model contains an unknown cpu definition name, unknown
 #       properties or properties with wrong types.
 #
 # Note: this command isn't specific to s390x, but is only implemented
 #     on this architecture currently.
 #
 # Since: 2.8
 ##
 { 'command': 'query-cpu-model-baseline',
   'data': { 'modela': 'CpuModelInfo',
             'modelb': 'CpuModelInfo' },
   'returns': 'CpuModelBaselineInfo',
   'if': 'TARGET_S390X' }

 ##
 # @CpuModelExpansionInfo:
 #
 # The result of a cpu model expansion.
 #
 # @model: the expanded CpuModelInfo.
 #
 # Since: 2.8
 ##
 { 'struct': 'CpuModelExpansionInfo',
   'data': { 'model': 'CpuModelInfo' },
   'if': { 'any': [ 'TARGET_S390X',
                    'TARGET_I386',
                    'TARGET_ARM',
                    'TARGET_LOONGARCH64',
                    'TARGET_RISCV' ] } }

 ##
 # @query-cpu-model-expansion:
 #
 # Expands a given CPU model, @model, (or a combination of CPU model +
 # additional options) to different granularities, specified by
 # @type, allowing tooling to get an understanding what a specific
 # CPU model looks like in QEMU under a certain configuration.
 #
 # This interface can be used to query the "host" CPU model.
 #
 # The data returned by this command may be affected by:
 #
 # * QEMU version: CPU models may look different depending on the QEMU
 #   version.  (Except for CPU models reported as "static" in
 #   query-cpu-definitions.)
 # * machine-type: CPU model may look different depending on the
 #   machine-type.  (Except for CPU models reported as "static" in
 #   query-cpu-definitions.)
 # * machine options (including accelerator): in some architectures,
 #   CPU models may look different depending on machine and accelerator
 #   options.  (Except for CPU models reported as "static" in
 #   query-cpu-definitions.)
 # * "-cpu" arguments and global properties: arguments to the -cpu
 #   option and global properties may affect expansion of CPU models.
 #   Using query-cpu-model-expansion while using these is not advised.
 #
 # Some architectures may not support all expansion types.  s390x
 # supports "full" and "static". Arm only supports "full".
 #
 # @model: description of the CPU model to expand
 #
 # @type: expansion type, specifying how to expand the CPU model
 #
 # Returns: a CpuModelExpansionInfo describing the expanded CPU model
 #
 # Errors:
 #     - if expanding CPU models is not supported
 #     - if the model cannot be expanded
 #     - if the model contains an unknown CPU definition name, unknown
 #       properties or properties with a wrong type
 #     - if an expansion type is not supported
 #
 # Since: 2.8
 ##
 { 'command': 'query-cpu-model-expansion',
   'data': { 'type': 'CpuModelExpansionType',
             'model': 'CpuModelInfo' },
   'returns': 'CpuModelExpansionInfo',
   'if': { 'any': [ 'TARGET_S390X',
                    'TARGET_I386',
                    'TARGET_ARM',
                    'TARGET_LOONGARCH64',
                    'TARGET_RISCV' ] } }

 ##
 # @CpuDefinitionInfo:
 #
 # Virtual CPU definition.
 #
 # @name: the name of the CPU definition
 #
 # @migration-safe: whether a CPU definition can be safely used for
 #     migration in combination with a QEMU compatibility machine when
 #     migrating between different QEMU versions and between hosts with
 #     different sets of (hardware or software) capabilities.  If not
 #     provided, information is not available and callers should not
 #     assume the CPU definition to be migration-safe.  (since 2.8)
 #
 # @static: whether a CPU definition is static and will not change
 #     depending on QEMU version, machine type, machine options and
 #     accelerator options.  A static model is always migration-safe.
 #     (since 2.8)
 #
 # @unavailable-features: List of properties that prevent the CPU model
 #     from running in the current host.  (since 2.8)
 #
 # @typename: Type name that can be used as argument to
 #     @device-list-properties, to introspect properties configurable
 #     using -cpu or -global.  (since 2.9)
 #
 # @alias-of: Name of CPU model this model is an alias for.  The target
 #     of the CPU model alias may change depending on the machine type.
 #     Management software is supposed to translate CPU model aliases
 #     in the VM configuration, because aliases may stop being
 #     migration-safe in the future (since 4.1)
 #
 # @deprecated: If true, this CPU model is deprecated and may be
 #     removed in in some future version of QEMU according to the QEMU
 #     deprecation policy.  (since 5.2)
 #
 # @unavailable-features is a list of QOM property names that represent
 # CPU model attributes that prevent the CPU from running.  If the QOM
 # property is read-only, that means there's no known way to make the
 # CPU model run in the current host.  Implementations that choose not
 # to provide specific information return the property name "type". If
 # the property is read-write, it means that it MAY be possible to run
 # the CPU model in the current host if that property is changed.
 # Management software can use it as hints to suggest or choose an
 # alternative for the user, or just to generate meaningful error
 # messages explaining why the CPU model can't be used.  If
 # @unavailable-features is an empty list, the CPU model is runnable
 # using the current host and machine-type.  If @unavailable-features
 # is not present, runnability information for the CPU is not
 # available.
 #
 # Since: 1.2
 ##
 { 'struct': 'CpuDefinitionInfo',
   'data': { 'name': 'str',
             '*migration-safe': 'bool',
             'static': 'bool',
             '*unavailable-features': [ 'str' ],
             'typename': 'str',
             '*alias-of' : 'str',
             'deprecated' : 'bool' },
   'if': { 'any': [ 'TARGET_PPC',
                    'TARGET_ARM',
                    'TARGET_I386',
                    'TARGET_S390X',
                    'TARGET_MIPS',
                    'TARGET_LOONGARCH64',
                    'TARGET_RISCV' ] } }

 ##
 # @query-cpu-definitions:
 #
 # Return a list of supported virtual CPU definitions
 #
 # Returns: a list of CpuDefinitionInfo
 #
 # Since: 1.2
 ##
 { 'command': 'query-cpu-definitions', 'returns': ['CpuDefinitionInfo'],
   'if': { 'any': [ 'TARGET_PPC',
                    'TARGET_ARM',
                    'TARGET_I386',
                    'TARGET_S390X',
                    'TARGET_MIPS',
                    'TARGET_LOONGARCH64',
                    'TARGET_RISCV' ] } }

 ##
 # @CpuS390Polarization:
 #
 # An enumeration of CPU polarization that can be assumed by a virtual
 # S390 CPU
 #
 # Since: 8.2
 ##
 { 'enum': 'CpuS390Polarization',
   'prefix': 'S390_CPU_POLARIZATION',
   'data': [ 'horizontal', 'vertical' ],
   'if': 'TARGET_S390X'
 }

 ##
 # @set-cpu-topology:
 #
 # Modify the topology by moving the CPU inside the topology tree, or
 # by changing a modifier attribute of a CPU.  Absent values will not
 # be modified.
 #
 # @core-id: the vCPU ID to be moved
 #
 # @socket-id: destination socket to move the vCPU to
 #
 # @book-id: destination book to move the vCPU to
 #
 # @drawer-id: destination drawer to move the vCPU to
 #
 # @entitlement: entitlement to set
 #
 # @dedicated: whether the provisioning of real to virtual CPU is
 #     dedicated
 #
 # Features:
 #
 # @unstable: This command is experimental.
 #
 # Since: 8.2
 ##
 { 'command': 'set-cpu-topology',
   'data': {
       'core-id': 'uint16',
       '*socket-id': 'uint16',
       '*book-id': 'uint16',
       '*drawer-id': 'uint16',
       '*entitlement': 'CpuS390Entitlement',
       '*dedicated': 'bool'
   },
   'features': [ 'unstable' ],
   'if': { 'all': [ 'TARGET_S390X' , 'CONFIG_KVM' ] }
 }

 ##
 # @CPU_POLARIZATION_CHANGE:
 #
 # Emitted when the guest asks to change the polarization.
 #
 # The guest can tell the host (via the PTF instruction) whether the
 # CPUs should be provisioned using horizontal or vertical
 # polarization.
 #
 # On horizontal polarization the host is expected to provision all
 # vCPUs equally.
 #
 # On vertical polarization the host can provision each vCPU
 # differently.  The guest will get information on the details of the
 # provisioning the next time it uses the STSI(15) instruction.
 #
 # @polarization: polarization specified by the guest
 #
 # Features:
 #
 # @unstable: This event is experimental.
 #
 # Since: 8.2
 #
 # Example:
 #
 #     <- { "event": "CPU_POLARIZATION_CHANGE",
 #          "data": { "polarization": "horizontal" },
 #          "timestamp": { "seconds": 1401385907, "microseconds": 422329 } }
 ##
 { 'event': 'CPU_POLARIZATION_CHANGE',
   'data': { 'polarization': 'CpuS390Polarization' },
   'features': [ 'unstable' ],
   'if': { 'all': [ 'TARGET_S390X', 'CONFIG_KVM' ] }
 }

 ##
 # @CpuPolarizationInfo:
 #
 # The result of a CPU polarization query.
 #
 # @polarization: the CPU polarization
 #
 # Since: 8.2
 ##
 { 'struct': 'CpuPolarizationInfo',
   'data': { 'polarization': 'CpuS390Polarization' },
   'if': { 'all': [ 'TARGET_S390X', 'CONFIG_KVM' ] }
 }

 ##
 # @query-s390x-cpu-polarization:
 #
 # Features:
 #
 # @unstable: This command is experimental.
 #
 # Returns: the machine's CPU polarization
 #
 # Since: 8.2
 ##
 { 'command': 'query-s390x-cpu-polarization', 'returns': 'CpuPolarizationInfo',
   'features': [ 'unstable' ],
   'if': { 'all': [ 'TARGET_S390X', 'CONFIG_KVM' ] }
 }
	# -- Mode: Python --
	# vim: filetype=python
	#
	# This work is licensed under the terms of the GNU GPL, version 2 or later.
	# See the COPYING file in the top-level directory.

	{ 'include': 'machine-common.json' }

	##
	# @CpuModelInfo:
	#
	# Virtual CPU model.
	#
	# A CPU model consists of the name of a CPU definition, to which delta
	# changes are applied (e.g. features added/removed). Most magic values
	# that an architecture might require should be hidden behind the name.
	# However, if required, architectures can expose relevant properties.
	#
	# @name: the name of the CPU definition the model is based on
	#
	# @props: a dictionary of QOM properties to be applied
	#
	# Since: 2.8
	##
	{ 'struct': 'CpuModelInfo',
	'data': { 'name': 'str',
	'*props': 'any' } }

	##
	# @CpuModelExpansionType:
	#
	# An enumeration of CPU model expansion types.
	#
	# @static: Expand to a static CPU model, a combination of a static
	# base model name and property delta changes. As the static base
	# model will never change, the expanded CPU model will be the
	# same, independent of QEMU version, machine type, machine
	# options, and accelerator options. Therefore, the resulting
	# model can be used by tooling without having to specify a
	# compatibility machine - e.g. when displaying the "host" model.
	# The @static CPU models are migration-safe.
	#
	# @full: Expand all properties. The produced model is not guaranteed
	# to be migration-safe, but allows tooling to get an insight and
	# work with model details.
	#
	# Note: When a non-migration-safe CPU model is expanded in static
	# mode, some features enabled by the CPU model may be omitted,
	# because they can't be implemented by a static CPU model
	# definition (e.g. cache info passthrough and PMU passthrough in
	# x86). If you need an accurate representation of the features
	# enabled by a non-migration-safe CPU model, use @full. If you
	# need a static representation that will keep ABI compatibility
	# even when changing QEMU version or machine-type, use @static
	# (but keep in mind that some features may be omitted).
	#
	# Since: 2.8
	##
	{ 'enum': 'CpuModelExpansionType',
	'data': [ 'static', 'full' ] }

	##
	# @CpuModelCompareResult:
	#
	# An enumeration of CPU model comparison results. The result is
	# usually calculated using e.g. CPU features or CPU generations.
	#
	# @incompatible: If model A is incompatible to model B, model A is not
	# guaranteed to run where model B runs and the other way around.
	#
	# @identical: If model A is identical to model B, model A is
	# guaranteed to run where model B runs and the other way around.
	#
	# @superset: If model A is a superset of model B, model B is
	# guaranteed to run where model A runs. There are no guarantees
	# about the other way.
	#
	# @subset: If model A is a subset of model B, model A is guaranteed to
	# run where model B runs. There are no guarantees about the other
	# way.
	#
	# Since: 2.8
	##
	{ 'enum': 'CpuModelCompareResult',
	'data': [ 'incompatible', 'identical', 'superset', 'subset' ] }

	##
	# @CpuModelBaselineInfo:
	#
	# The result of a CPU model baseline.
	#
	# @model: the baselined CpuModelInfo.
	#
	# Since: 2.8
	##
	{ 'struct': 'CpuModelBaselineInfo',
	'data': { 'model': 'CpuModelInfo' },
	'if': 'TARGET_S390X' }

	##
	# @CpuModelCompareInfo:
	#
	# The result of a CPU model comparison.
	#
	# @result: The result of the compare operation.
	#
	# @responsible-properties: List of properties that led to the
	# comparison result not being identical.
	#
	# @responsible-properties is a list of QOM property names that led to
	# both CPUs not being detected as identical. For identical models,
	# this list is empty. If a QOM property is read-only, that means
	# there's no known way to make the CPU models identical. If the
	# special property name "type" is included, the models are by
	# definition not identical and cannot be made identical.
	#
	# Since: 2.8
	##
	{ 'struct': 'CpuModelCompareInfo',
	'data': { 'result': 'CpuModelCompareResult',
	'responsible-properties': ['str'] },
	'if': 'TARGET_S390X' }

	##
	# @query-cpu-model-comparison:
	#
	# Compares two CPU models, @modela and @modelb, returning how they
	# compare in a specific configuration. The results indicates how
	# both models compare regarding runnability. This result can be
	# used by tooling to make decisions if a certain CPU model will
	# run in a certain configuration or if a compatible CPU model has
	# to be created by baselining.
	#
	# Usually, a CPU model is compared against the maximum possible CPU
	# model of a certain configuration (e.g. the "host" model for KVM).
	# If that CPU model is identical or a subset, it will run in that
	# configuration.
	#
	# The result returned by this command may be affected by:
	#
	# * QEMU version: CPU models may look different depending on the QEMU
	# version. (Except for CPU models reported as "static" in
	# query-cpu-definitions.)
	# * machine-type: CPU model may look different depending on the
	# machine-type. (Except for CPU models reported as "static" in
	# query-cpu-definitions.)
	# * machine options (including accelerator): in some architectures,
	# CPU models may look different depending on machine and accelerator
	# options. (Except for CPU models reported as "static" in
	# query-cpu-definitions.)
	# * "-cpu" arguments and global properties: arguments to the -cpu
	# option and global properties may affect expansion of CPU models.
	# Using query-cpu-model-expansion while using these is not advised.
	#
	# Some architectures may not support comparing CPU models. s390x
	# supports comparing CPU models.
	#
	# @modela: description of the first CPU model to compare, referred to as
	# "model A" in CpuModelCompareResult
	#
	# @modelb: description of the second CPU model to compare, referred to as
	# "model B" in CpuModelCompareResult
	#
	# Returns: a CpuModelCompareInfo describing how both CPU models
	# compare
	#
	# Errors:
	# - if comparing CPU models is not supported
	# - if a model cannot be used
	# - if a model contains an unknown cpu definition name, unknown
	# properties or properties with wrong types.
	#
	# Note: this command isn't specific to s390x, but is only implemented
	# on this architecture currently.
	#
	# Since: 2.8
	##
	{ 'command': 'query-cpu-model-comparison',
	'data': { 'modela': 'CpuModelInfo', 'modelb': 'CpuModelInfo' },
	'returns': 'CpuModelCompareInfo',
	'if': 'TARGET_S390X' }

	##
	# @query-cpu-model-baseline:
	#
	# Baseline two CPU models, @modela and @modelb, creating a compatible
	# third model. The created model will always be a static,
	# migration-safe CPU model (see "static" CPU model expansion for details).
	#
	# This interface can be used by tooling to create a compatible CPU
	# model out two CPU models. The created CPU model will be identical
	# to or a subset of both CPU models when comparing them. Therefore,
	# the created CPU model is guaranteed to run where the given CPU
	# models run.
	#
	# The result returned by this command may be affected by:
	#
	# * QEMU version: CPU models may look different depending on the QEMU
	# version. (Except for CPU models reported as "static" in
	# query-cpu-definitions.)
	# * machine-type: CPU model may look different depending on the
	# machine-type. (Except for CPU models reported as "static" in
	# query-cpu-definitions.)
	# * machine options (including accelerator): in some architectures,
	# CPU models may look different depending on machine and accelerator
	# options. (Except for CPU models reported as "static" in
	# query-cpu-definitions.)
	# * "-cpu" arguments and global properties: arguments to the -cpu
	# option and global properties may affect expansion of CPU models.
	# Using query-cpu-model-expansion while using these is not advised.
	#
	# Some architectures may not support baselining CPU models. s390x
	# supports baselining CPU models.
	#
	# @modela: description of the first CPU model to baseline
	#
	# @modelb: description of the second CPU model to baseline
	#
	# Returns: a CpuModelBaselineInfo describing the baselined CPU model
	#
	# Errors:
	# - if baselining CPU models is not supported
	# - if a model cannot be used
	# - if a model contains an unknown cpu definition name, unknown
	# properties or properties with wrong types.
	#
	# Note: this command isn't specific to s390x, but is only implemented
	# on this architecture currently.
	#
	# Since: 2.8
	##
	{ 'command': 'query-cpu-model-baseline',
	'data': { 'modela': 'CpuModelInfo',
	'modelb': 'CpuModelInfo' },
	'returns': 'CpuModelBaselineInfo',
	'if': 'TARGET_S390X' }

	##
	# @CpuModelExpansionInfo:
	#
	# The result of a cpu model expansion.
	#
	# @model: the expanded CpuModelInfo.
	#
	# Since: 2.8
	##
	{ 'struct': 'CpuModelExpansionInfo',
	'data': { 'model': 'CpuModelInfo' },
	'if': { 'any': [ 'TARGET_S390X',
	'TARGET_I386',
	'TARGET_ARM',
	'TARGET_LOONGARCH64',
	'TARGET_RISCV' ] } }

	##
	# @query-cpu-model-expansion:
	#
	# Expands a given CPU model, @model, (or a combination of CPU model +
	# additional options) to different granularities, specified by
	# @type, allowing tooling to get an understanding what a specific
	# CPU model looks like in QEMU under a certain configuration.
	#
	# This interface can be used to query the "host" CPU model.
	#
	# The data returned by this command may be affected by:
	#
	# * QEMU version: CPU models may look different depending on the QEMU
	# version. (Except for CPU models reported as "static" in
	# query-cpu-definitions.)
	# * machine-type: CPU model may look different depending on the
	# machine-type. (Except for CPU models reported as "static" in
	# query-cpu-definitions.)
	# * machine options (including accelerator): in some architectures,
	# CPU models may look different depending on machine and accelerator
	# options. (Except for CPU models reported as "static" in
	# query-cpu-definitions.)
	# * "-cpu" arguments and global properties: arguments to the -cpu
	# option and global properties may affect expansion of CPU models.
	# Using query-cpu-model-expansion while using these is not advised.
	#
	# Some architectures may not support all expansion types. s390x
	# supports "full" and "static". Arm only supports "full".
	#
	# @model: description of the CPU model to expand
	#
	# @type: expansion type, specifying how to expand the CPU model
	#
	# Returns: a CpuModelExpansionInfo describing the expanded CPU model
	#
	# Errors:
	# - if expanding CPU models is not supported
	# - if the model cannot be expanded
	# - if the model contains an unknown CPU definition name, unknown
	# properties or properties with a wrong type
	# - if an expansion type is not supported
	#
	# Since: 2.8
	##
	{ 'command': 'query-cpu-model-expansion',
	'data': { 'type': 'CpuModelExpansionType',
	'model': 'CpuModelInfo' },
	'returns': 'CpuModelExpansionInfo',
	'if': { 'any': [ 'TARGET_S390X',
	'TARGET_I386',
	'TARGET_ARM',
	'TARGET_LOONGARCH64',
	'TARGET_RISCV' ] } }

	##
	# @CpuDefinitionInfo:
	#
	# Virtual CPU definition.
	#
	# @name: the name of the CPU definition
	#
	# @migration-safe: whether a CPU definition can be safely used for
	# migration in combination with a QEMU compatibility machine when
	# migrating between different QEMU versions and between hosts with
	# different sets of (hardware or software) capabilities. If not
	# provided, information is not available and callers should not
	# assume the CPU definition to be migration-safe. (since 2.8)
	#
	# @static: whether a CPU definition is static and will not change
	# depending on QEMU version, machine type, machine options and
	# accelerator options. A static model is always migration-safe.
	# (since 2.8)
	#
	# @unavailable-features: List of properties that prevent the CPU model
	# from running in the current host. (since 2.8)
	#
	# @typename: Type name that can be used as argument to
	# @device-list-properties, to introspect properties configurable
	# using -cpu or -global. (since 2.9)
	#
	# @alias-of: Name of CPU model this model is an alias for. The target
	# of the CPU model alias may change depending on the machine type.
	# Management software is supposed to translate CPU model aliases
	# in the VM configuration, because aliases may stop being
	# migration-safe in the future (since 4.1)
	#
	# @deprecated: If true, this CPU model is deprecated and may be
	# removed in in some future version of QEMU according to the QEMU
	# deprecation policy. (since 5.2)
	#
	# @unavailable-features is a list of QOM property names that represent
	# CPU model attributes that prevent the CPU from running. If the QOM
	# property is read-only, that means there's no known way to make the
	# CPU model run in the current host. Implementations that choose not
	# to provide specific information return the property name "type". If
	# the property is read-write, it means that it MAY be possible to run
	# the CPU model in the current host if that property is changed.
	# Management software can use it as hints to suggest or choose an
	# alternative for the user, or just to generate meaningful error
	# messages explaining why the CPU model can't be used. If
	# @unavailable-features is an empty list, the CPU model is runnable
	# using the current host and machine-type. If @unavailable-features
	# is not present, runnability information for the CPU is not
	# available.
	#
	# Since: 1.2
	##
	{ 'struct': 'CpuDefinitionInfo',
	'data': { 'name': 'str',
	'*migration-safe': 'bool',
	'static': 'bool',
	'*unavailable-features': [ 'str' ],
	'typename': 'str',
	'*alias-of' : 'str',
	'deprecated' : 'bool' },
	'if': { 'any': [ 'TARGET_PPC',
	'TARGET_ARM',
	'TARGET_I386',
	'TARGET_S390X',
	'TARGET_MIPS',
	'TARGET_LOONGARCH64',
	'TARGET_RISCV' ] } }

	##
	# @query-cpu-definitions:
	#
	# Return a list of supported virtual CPU definitions
	#
	# Returns: a list of CpuDefinitionInfo
	#
	# Since: 1.2
	##
	{ 'command': 'query-cpu-definitions', 'returns': ['CpuDefinitionInfo'],
	'if': { 'any': [ 'TARGET_PPC',
	'TARGET_ARM',
	'TARGET_I386',
	'TARGET_S390X',
	'TARGET_MIPS',
	'TARGET_LOONGARCH64',
	'TARGET_RISCV' ] } }

	##
	# @CpuS390Polarization:
	#
	# An enumeration of CPU polarization that can be assumed by a virtual
	# S390 CPU
	#
	# Since: 8.2
	##
	{ 'enum': 'CpuS390Polarization',
	'prefix': 'S390_CPU_POLARIZATION',
	'data': [ 'horizontal', 'vertical' ],
	'if': 'TARGET_S390X'
	}

	##
	# @set-cpu-topology:
	#
	# Modify the topology by moving the CPU inside the topology tree, or
	# by changing a modifier attribute of a CPU. Absent values will not
	# be modified.
	#
	# @core-id: the vCPU ID to be moved
	#
	# @socket-id: destination socket to move the vCPU to
	#
	# @book-id: destination book to move the vCPU to
	#
	# @drawer-id: destination drawer to move the vCPU to
	#
	# @entitlement: entitlement to set
	#
	# @dedicated: whether the provisioning of real to virtual CPU is
	# dedicated
	#
	# Features:
	#
	# @unstable: This command is experimental.
	#
	# Since: 8.2
	##
	{ 'command': 'set-cpu-topology',
	'data': {
	'core-id': 'uint16',
	'*socket-id': 'uint16',
	'*book-id': 'uint16',
	'*drawer-id': 'uint16',
	'*entitlement': 'CpuS390Entitlement',
	'*dedicated': 'bool'
	},
	'features': [ 'unstable' ],
	'if': { 'all': [ 'TARGET_S390X' , 'CONFIG_KVM' ] }
	}

	##
	# @CPU_POLARIZATION_CHANGE:
	#
	# Emitted when the guest asks to change the polarization.
	#
	# The guest can tell the host (via the PTF instruction) whether the
	# CPUs should be provisioned using horizontal or vertical
	# polarization.
	#
	# On horizontal polarization the host is expected to provision all
	# vCPUs equally.
	#
	# On vertical polarization the host can provision each vCPU
	# differently. The guest will get information on the details of the
	# provisioning the next time it uses the STSI(15) instruction.
	#
	# @polarization: polarization specified by the guest
	#
	# Features:
	#
	# @unstable: This event is experimental.
	#
	# Since: 8.2
	#
	# Example:
	#
	# <- { "event": "CPU_POLARIZATION_CHANGE",
	# "data": { "polarization": "horizontal" },
	# "timestamp": { "seconds": 1401385907, "microseconds": 422329 } }
	##
	{ 'event': 'CPU_POLARIZATION_CHANGE',
	'data': { 'polarization': 'CpuS390Polarization' },
	'features': [ 'unstable' ],
	'if': { 'all': [ 'TARGET_S390X', 'CONFIG_KVM' ] }
	}

	##
	# @CpuPolarizationInfo:
	#
	# The result of a CPU polarization query.
	#
	# @polarization: the CPU polarization
	#
	# Since: 8.2
	##
	{ 'struct': 'CpuPolarizationInfo',
	'data': { 'polarization': 'CpuS390Polarization' },
	'if': { 'all': [ 'TARGET_S390X', 'CONFIG_KVM' ] }
	}

	##
	# @query-s390x-cpu-polarization:
	#
	# Features:
	#
	# @unstable: This command is experimental.
	#
	# Returns: the machine's CPU polarization
	#
	# Since: 8.2
	##
	{ 'command': 'query-s390x-cpu-polarization', 'returns': 'CpuPolarizationInfo',
	'features': [ 'unstable' ],
	'if': { 'all': [ 'TARGET_S390X', 'CONFIG_KVM' ] }
	}