Hyper-V guest nexus device
hyperv driver performs Synthetic Interrupt Controller
initialization, sets up hypercalls, and provides access to VMBus services
required by paravirtualized devices such as disk and network interfaces.
An access is also provided to the Key-Value Pair exchange
interface via pvbus(4). All keys are
associated to one of several key pools: Auto,
Guest, External or
Guest/Parameters. It's possible to modify values of keys
in the Auto pool as well as set new keys in the
Guest pool with
hostctl(8). The Host provides its
read-only keys in External and
hyperv driver first appeared in
Generation 2 Virtual Machines are currently not supported.