xen-hypervisor-common 4.11.3+24-g14b62ab3e5-1ubuntu2.1 (i386 binary) in ubuntu focal

 The configuration which arranges for an installed hypervisor to be booted
 as default, with the right command line arguments passed to both
 hypervisor and host (Domain 0) kernel.
 .
 This package is only required on the host system (Domain 0) and not on the
 virtual guest systems (Domain U).