#rpm -q libvirt qemu-kvm; uname -r
libvirt-10.10.0-7.1.el9_6.x86_64
qemu-kvm-9.1.0-15.el9.x86_64
5.14.0-570.12.1.el9_6.x86_64

for i in $(/usr/libexec/qemu-kvm -cpu help|awk '/Available CPUs/,/Recognized CPUID flags/'|grep '^  '|awk '{print $1}');do
  if ! virsh cpu-models x86_64|grep -q $i;then
    echo $i
  fi;
done | grep -Ev '^(base|host|max)$'