425876f5d8
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn> Signed-off-by: Song Gao <gaosong@loongson.cn> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220606124333.2060567-22-yangxiaojuan@loongson.cn> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
345 lines
14 KiB
Python
345 lines
14 KiB
Python
# -*- Mode: Python -*-
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# vim: filetype=python
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#
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# This work is licensed under the terms of the GNU GPL, version 2 or later.
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# See the COPYING file in the top-level directory.
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##
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# @CpuModelInfo:
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#
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# Virtual CPU model.
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#
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# A CPU model consists of the name of a CPU definition, to which
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# delta changes are applied (e.g. features added/removed). Most magic values
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# that an architecture might require should be hidden behind the name.
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# However, if required, architectures can expose relevant properties.
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#
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# @name: the name of the CPU definition the model is based on
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# @props: a dictionary of QOM properties to be applied
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#
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# Since: 2.8
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##
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{ 'struct': 'CpuModelInfo',
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'data': { 'name': 'str',
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'*props': 'any' } }
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##
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# @CpuModelExpansionType:
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#
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# An enumeration of CPU model expansion types.
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#
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# @static: Expand to a static CPU model, a combination of a static base
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# model name and property delta changes. As the static base model will
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# never change, the expanded CPU model will be the same, independent of
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# QEMU version, machine type, machine options, and accelerator options.
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# Therefore, the resulting model can be used by tooling without having
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# to specify a compatibility machine - e.g. when displaying the "host"
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# model. The @static CPU models are migration-safe.
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# @full: Expand all properties. The produced model is not guaranteed to be
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# migration-safe, but allows tooling to get an insight and work with
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# model details.
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#
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# Note: When a non-migration-safe CPU model is expanded in static mode, some
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# features enabled by the CPU model may be omitted, because they can't be
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# implemented by a static CPU model definition (e.g. cache info passthrough and
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# PMU passthrough in x86). If you need an accurate representation of the
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# features enabled by a non-migration-safe CPU model, use @full. If you need a
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# static representation that will keep ABI compatibility even when changing QEMU
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# version or machine-type, use @static (but keep in mind that some features may
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# be omitted).
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#
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# Since: 2.8
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##
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{ 'enum': 'CpuModelExpansionType',
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'data': [ 'static', 'full' ] }
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##
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# @CpuModelCompareResult:
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#
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# An enumeration of CPU model comparison results. The result is usually
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# calculated using e.g. CPU features or CPU generations.
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#
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# @incompatible: If model A is incompatible to model B, model A is not
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# guaranteed to run where model B runs and the other way around.
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#
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# @identical: If model A is identical to model B, model A is guaranteed to run
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# where model B runs and the other way around.
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#
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# @superset: If model A is a superset of model B, model B is guaranteed to run
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# where model A runs. There are no guarantees about the other way.
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#
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# @subset: If model A is a subset of model B, model A is guaranteed to run
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# where model B runs. There are no guarantees about the other way.
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#
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# Since: 2.8
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##
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{ 'enum': 'CpuModelCompareResult',
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'data': [ 'incompatible', 'identical', 'superset', 'subset' ] }
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##
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# @CpuModelBaselineInfo:
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#
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# The result of a CPU model baseline.
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#
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# @model: the baselined CpuModelInfo.
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#
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# Since: 2.8
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##
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{ 'struct': 'CpuModelBaselineInfo',
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'data': { 'model': 'CpuModelInfo' },
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'if': 'TARGET_S390X' }
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##
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# @CpuModelCompareInfo:
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#
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# The result of a CPU model comparison.
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#
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# @result: The result of the compare operation.
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# @responsible-properties: List of properties that led to the comparison result
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# not being identical.
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#
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# @responsible-properties is a list of QOM property names that led to
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# both CPUs not being detected as identical. For identical models, this
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# list is empty.
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# If a QOM property is read-only, that means there's no known way to make the
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# CPU models identical. If the special property name "type" is included, the
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# models are by definition not identical and cannot be made identical.
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#
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# Since: 2.8
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##
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{ 'struct': 'CpuModelCompareInfo',
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'data': { 'result': 'CpuModelCompareResult',
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'responsible-properties': ['str'] },
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'if': 'TARGET_S390X' }
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##
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# @query-cpu-model-comparison:
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#
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# Compares two CPU models, returning how they compare in a specific
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# configuration. The results indicates how both models compare regarding
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# runnability. This result can be used by tooling to make decisions if a
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# certain CPU model will run in a certain configuration or if a compatible
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# CPU model has to be created by baselining.
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#
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# Usually, a CPU model is compared against the maximum possible CPU model
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# of a certain configuration (e.g. the "host" model for KVM). If that CPU
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# model is identical or a subset, it will run in that configuration.
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#
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# The result returned by this command may be affected by:
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#
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# * QEMU version: CPU models may look different depending on the QEMU version.
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# (Except for CPU models reported as "static" in query-cpu-definitions.)
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# * machine-type: CPU model may look different depending on the machine-type.
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# (Except for CPU models reported as "static" in query-cpu-definitions.)
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# * machine options (including accelerator): in some architectures, CPU models
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# may look different depending on machine and accelerator options. (Except for
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# CPU models reported as "static" in query-cpu-definitions.)
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# * "-cpu" arguments and global properties: arguments to the -cpu option and
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# global properties may affect expansion of CPU models. Using
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# query-cpu-model-expansion while using these is not advised.
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#
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# Some architectures may not support comparing CPU models. s390x supports
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# comparing CPU models.
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#
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# Returns: a CpuModelBaselineInfo. Returns an error if comparing CPU models is
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# not supported, if a model cannot be used, if a model contains
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# an unknown cpu definition name, unknown properties or properties
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# with wrong types.
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#
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# Note: this command isn't specific to s390x, but is only implemented
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# on this architecture currently.
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#
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# Since: 2.8
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##
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{ 'command': 'query-cpu-model-comparison',
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'data': { 'modela': 'CpuModelInfo', 'modelb': 'CpuModelInfo' },
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'returns': 'CpuModelCompareInfo',
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'if': 'TARGET_S390X' }
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##
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# @query-cpu-model-baseline:
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#
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# Baseline two CPU models, creating a compatible third model. The created
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# model will always be a static, migration-safe CPU model (see "static"
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# CPU model expansion for details).
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#
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# This interface can be used by tooling to create a compatible CPU model out
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# two CPU models. The created CPU model will be identical to or a subset of
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# both CPU models when comparing them. Therefore, the created CPU model is
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# guaranteed to run where the given CPU models run.
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#
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# The result returned by this command may be affected by:
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#
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# * QEMU version: CPU models may look different depending on the QEMU version.
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# (Except for CPU models reported as "static" in query-cpu-definitions.)
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# * machine-type: CPU model may look different depending on the machine-type.
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# (Except for CPU models reported as "static" in query-cpu-definitions.)
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# * machine options (including accelerator): in some architectures, CPU models
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# may look different depending on machine and accelerator options. (Except for
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# CPU models reported as "static" in query-cpu-definitions.)
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# * "-cpu" arguments and global properties: arguments to the -cpu option and
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# global properties may affect expansion of CPU models. Using
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# query-cpu-model-expansion while using these is not advised.
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#
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# Some architectures may not support baselining CPU models. s390x supports
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# baselining CPU models.
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#
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# Returns: a CpuModelBaselineInfo. Returns an error if baselining CPU models is
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# not supported, if a model cannot be used, if a model contains
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# an unknown cpu definition name, unknown properties or properties
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# with wrong types.
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#
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# Note: this command isn't specific to s390x, but is only implemented
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# on this architecture currently.
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#
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# Since: 2.8
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##
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{ 'command': 'query-cpu-model-baseline',
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'data': { 'modela': 'CpuModelInfo',
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'modelb': 'CpuModelInfo' },
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'returns': 'CpuModelBaselineInfo',
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'if': 'TARGET_S390X' }
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##
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# @CpuModelExpansionInfo:
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#
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# The result of a cpu model expansion.
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#
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# @model: the expanded CpuModelInfo.
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#
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# Since: 2.8
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##
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{ 'struct': 'CpuModelExpansionInfo',
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'data': { 'model': 'CpuModelInfo' },
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'if': { 'any': [ 'TARGET_S390X',
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'TARGET_I386',
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'TARGET_ARM' ] } }
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##
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# @query-cpu-model-expansion:
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#
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# Expands a given CPU model (or a combination of CPU model + additional options)
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# to different granularities, allowing tooling to get an understanding what a
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# specific CPU model looks like in QEMU under a certain configuration.
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#
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# This interface can be used to query the "host" CPU model.
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#
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# The data returned by this command may be affected by:
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#
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# * QEMU version: CPU models may look different depending on the QEMU version.
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# (Except for CPU models reported as "static" in query-cpu-definitions.)
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# * machine-type: CPU model may look different depending on the machine-type.
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# (Except for CPU models reported as "static" in query-cpu-definitions.)
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# * machine options (including accelerator): in some architectures, CPU models
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# may look different depending on machine and accelerator options. (Except for
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# CPU models reported as "static" in query-cpu-definitions.)
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# * "-cpu" arguments and global properties: arguments to the -cpu option and
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# global properties may affect expansion of CPU models. Using
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# query-cpu-model-expansion while using these is not advised.
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#
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# Some architectures may not support all expansion types. s390x supports
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# "full" and "static". Arm only supports "full".
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#
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# Returns: a CpuModelExpansionInfo. Returns an error if expanding CPU models is
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# not supported, if the model cannot be expanded, if the model contains
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# an unknown CPU definition name, unknown properties or properties
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# with a wrong type. Also returns an error if an expansion type is
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# not supported.
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#
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# Since: 2.8
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##
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{ 'command': 'query-cpu-model-expansion',
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'data': { 'type': 'CpuModelExpansionType',
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'model': 'CpuModelInfo' },
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'returns': 'CpuModelExpansionInfo',
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'if': { 'any': [ 'TARGET_S390X',
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'TARGET_I386',
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'TARGET_ARM' ] } }
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##
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# @CpuDefinitionInfo:
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#
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# Virtual CPU definition.
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#
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# @name: the name of the CPU definition
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#
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# @migration-safe: whether a CPU definition can be safely used for
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# migration in combination with a QEMU compatibility machine
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# when migrating between different QEMU versions and between
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# hosts with different sets of (hardware or software)
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# capabilities. If not provided, information is not available
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# and callers should not assume the CPU definition to be
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# migration-safe. (since 2.8)
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#
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# @static: whether a CPU definition is static and will not change depending on
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# QEMU version, machine type, machine options and accelerator options.
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# A static model is always migration-safe. (since 2.8)
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#
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# @unavailable-features: List of properties that prevent
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# the CPU model from running in the current
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# host. (since 2.8)
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# @typename: Type name that can be used as argument to @device-list-properties,
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# to introspect properties configurable using -cpu or -global.
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# (since 2.9)
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#
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# @alias-of: Name of CPU model this model is an alias for. The target of the
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# CPU model alias may change depending on the machine type.
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# Management software is supposed to translate CPU model aliases
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# in the VM configuration, because aliases may stop being
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# migration-safe in the future (since 4.1)
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#
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# @deprecated: If true, this CPU model is deprecated and may be removed in
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# in some future version of QEMU according to the QEMU deprecation
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# policy. (since 5.2)
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#
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# @unavailable-features is a list of QOM property names that
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# represent CPU model attributes that prevent the CPU from running.
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# If the QOM property is read-only, that means there's no known
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# way to make the CPU model run in the current host. Implementations
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# that choose not to provide specific information return the
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# property name "type".
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# If the property is read-write, it means that it MAY be possible
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# to run the CPU model in the current host if that property is
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# changed. Management software can use it as hints to suggest or
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# choose an alternative for the user, or just to generate meaningful
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# error messages explaining why the CPU model can't be used.
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# If @unavailable-features is an empty list, the CPU model is
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# runnable using the current host and machine-type.
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# If @unavailable-features is not present, runnability
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# information for the CPU is not available.
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#
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# Since: 1.2
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##
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{ 'struct': 'CpuDefinitionInfo',
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'data': { 'name': 'str',
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'*migration-safe': 'bool',
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'static': 'bool',
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'*unavailable-features': [ 'str' ],
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'typename': 'str',
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'*alias-of' : 'str',
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'deprecated' : 'bool' },
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'if': { 'any': [ 'TARGET_PPC',
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'TARGET_ARM',
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'TARGET_I386',
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'TARGET_S390X',
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'TARGET_MIPS',
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'TARGET_LOONGARCH64' ] } }
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##
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# @query-cpu-definitions:
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#
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# Return a list of supported virtual CPU definitions
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#
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# Returns: a list of CpuDefInfo
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#
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# Since: 1.2
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##
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{ 'command': 'query-cpu-definitions', 'returns': ['CpuDefinitionInfo'],
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'if': { 'any': [ 'TARGET_PPC',
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'TARGET_ARM',
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'TARGET_I386',
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'TARGET_S390X',
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'TARGET_MIPS',
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'TARGET_LOONGARCH64' ] } }
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