This looks like if might help lead you toward an answer...

https://qemu-project.gitlab.io/qemu/system/qemu-cpu-models.html#libvirt-guest-xml



On Tue, 23 Jul 2024, 09:54 Javier Perez, <pepeb...@gmail.com> wrote:

> Hi.
> How can I tell virt-manager to create a VM but with a CPU of an older
> generation? I am trying to play an old game with wine but I keep getting
> crashes. Something about UMIP and SIDTs and similar stuff.
> My plan is, given that my CPU is 14th generation, probably I could get
> away virtualizing a VM faking an older CPU without that feature.
> My google-fu has not been that good, all I get is virtualizationn on old
> machines instead of how to virtualize an older CPU in a newer machine.
>
> Thanks for pointing me on the right direction...
>
> --
> ------------------------------
>  /\_/\
>  |O O|  pepeb...@gmail.com
>  ~~~~     Javier Perez
>  ~~~~          While the night runs
>  ~~~~          toward the day...
>   m m       Pepebuho watches
>                 from his high perch.
> --
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