# virsh dumpxml a --inactive --xpath //cpu
<cpu mode="host-model" check="partial"/>

# virsh dumpxml a --migratable --xpath //cpu
<cpu mode="custom" match="exact" check="full">
  <model fallback="forbid">Icelake-Server</model>
  <vendor>Intel</vendor>
  <feature policy="require" name="ds"/>
  <feature policy="require" name="ss"/>
  <feature policy="require" name="dtes64"/>
  <feature policy="require" name="vmx"/>
  <feature policy="require" name="pdcm"/>
  <feature policy="require" name="hypervisor"/>
  <feature policy="require" name="tsc_adjust"/>
  <feature policy="require" name="avx512ifma"/>
  <feature policy="require" name="sha-ni"/>
  <feature policy="require" name="rdpid"/>
  <feature policy="require" name="fsrm"/>
  <feature policy="require" name="md-clear"/>
  <feature policy="require" name="stibp"/>
  <feature policy="require" name="flush-l1d"/>
  <feature policy="require" name="arch-capabilities"/>
  <feature policy="require" name="xsaves"/>
  <feature policy="require" name="ibpb"/>
  <feature policy="require" name="ibrs"/>
  <feature policy="require" name="amd-stibp"/>
  <feature policy="require" name="amd-ssbd"/>
  <feature policy="require" name="rdctl-no"/>
  <feature policy="require" name="ibrs-all"/>
  <feature policy="require" name="skip-l1dfl-vmentry"/>
  <feature policy="require" name="mds-no"/>
  <feature policy="require" name="pschange-mc-no"/>
  <feature policy="require" name="tsx-ctrl"/>
  <feature policy="require" name="fb-clear"/>
  <feature policy="disable" name="hle"/>
  <feature policy="disable" name="rtm"/>
  <feature policy="disable" name="mpx"/>
  <feature policy="disable" name="intel-pt"/>
  <feature policy="disable" name="pconfig"/>
</cpu>

# virsh migrate a qemu+ssh://$target_hostname/system --live --verbose --undefinesource --p2p
error: operation failed: guest CPU doesn't match specification: extra features: vmx-ins-outs,vmx-true-ctls,vmx-store-lma,vmx-activity-hlt,vmx-vmwrite-vmexit-fields,vmx-apicv-xapic,vmx-ept,vmx-desc-exit,vmx-rdtscp-exit,vmx-apicv-x2apic,vmx-vpid,vmx-wbinvd-exit,vmx-unrestricted-guest,vmx-apicv-register,vmx-apicv-vid,vmx-rdrand-exit,vmx-invpcid-exit,vmx-vmfunc,vmx-shadow-vmcs,vmx-invvpid,vmx-invvpid-single-addr,vmx-invvpid-all-context,vmx-ept-execonly,vmx-page-walk-4,vmx-ept-2mb,vmx-ept-1gb,vmx-invept,vmx-eptad,vmx-invept-single-context,vmx-invept-all-context,vmx-intr-exit,vmx-nmi-exit,vmx-vnmi,vmx-preemption-timer,vmx-posted-intr,vmx-vintr-pending,vmx-tsc-offset,vmx-hlt-exit,vmx-invlpg-exit,vmx-mwait-exit,vmx-rdpmc-exit,vmx-rdtsc-exit,vmx-cr3-load-noexit,vmx-cr3-store-noexit,vmx-cr8-load-exit,vmx-cr8-store-exit,vmx-flexpriority,vmx-vnmi-pending,vmx-movdr-exit,vmx-io-exit,vmx-io-bitmap,vmx-mtf,vmx-msr-bitmap,vmx-monitor-exit,vmx-pause-exit,vmx-secondary-ctls,vmx-exit-nosave-debugctl,vmx-exit-ack-intr,vmx-exit-save-pat,vmx-exit-load-pat,vmx-exit-save-efer,vmx-exit-load-efer,vmx-exit-save-preemption-timer,vmx-entry-noload-debugctl,vmx-entry-ia32e-mode,vmx-entry-load-pat,vmx-entry-load-efer