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About

QEMU provides several APIs to deal with CPU features/extension probing. One of them is called query-cpu-model-expansion. It is used by tooling such as libvirt to query  features/extensions of a given CPU model. It is also used to query if the CPU model supports a certain configuration, e.g. if the CPU supports enabling/disabling a set of extensions. Its most common use, at least as far as libvirt is concerned, is to determine virtual machine compatibility with a QEMU binary if the virtual machine was created in an older QEMU version or if  the virtual machine was migrated from another host.

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The table below is rolled up to the Simulator WG status page Simulator/Emulator 2023 Priorities .


Page Properties


Development

Status
colourGreen
titleCOMPLETED


Development Timeline

2H23


Dependencies



Upstreaming

Status
colourBlueGreen
titleSTARTEDCOMPLETED


Upstream Version


Target 8.2

Contacts



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