xen-hypervisor-common - 4.17.3+36-g54dacb5c02-1+b1 main

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.
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This package is only required on the host system (Domain 0) and not on the
virtual guest systems (Domain U).