What were you trying to do that didn't work?

Migrating a VM from qemu 9.1.0-15.el9_6.9 to 9.1.0-29.el9_7.3 fails with the following error:

libvirtd[3284]: operation failed: guest CPU doesn't match specification: extra features: cmp_legacy

What is the impact of this issue to you?

High, VM's can't be migrated anymore

Please provide the package NVR for which the bug is seen:

libvirt-10.10.0-1

How reproducible is this bug?:

Always

Steps to reproduce

1. Boot VM on qemu 9.1.0-15.el9_6.9
2. Migrate it to a Hypervisor with 9.1.0-29.el9_7.3
3. It fails with libvirtd[3284]: operation failed: guest CPU doesn't match specification: extra features: cmp_legacy

Might be related to kvm-i386-cpu-Set-and-track-CPUID_EXT3_CMP_LEG-in-env-fea.patch patch in qemu?