hv_utils — Hyper-V Utilities Driver

       FreeBSD  support  for  hv_utils  was  first  added   by   Microsoft   BSD   Integration   Services   Team
       <bsdic@microsoft.com>.

Debian                                         September 10, 2013                                     HYPER-V(4)

       The hv_utils driver provides time  keeping,  shutdown  and  heartbeat  functionality  for  FreeBSD  guest
       partitions  running  on Hyper-V.  Hyper-V is a hypervisor-based virtualization technology from Microsoft.
       The hv_utils driver is one of the core drivers required to be present  in  guest  partitions  running  on
       Hyper-V.  This driver provides the following functionalities to guest partitions:

       (a) Time Keeping: The clock inside the guest partition will remain accurate by synchronizing to the clock
       on the virtualization server via Timesync service, and with the help of the pluggable time source device.

       (b)  Integrated  shutdown: Guest partitions running FreeBSD can be shut down from Hyper-V Manager console
       by using the "Shut down" command.

       (c) Heartbeat: This feature allows the virtualization server to detect whether  the  guest  partition  is
       running and responsive.

       Support  for  hv_utils  first  appeared in FreeBSD 10.0.  The driver was developed through a joint effort
       between Citrix Incorporated, Microsoft Corporation, and Network Appliance Incorporated.

       hv_utils — Hyper-V Utilities Driver

hv_ata_pci_disengage(4), hv_netvsc(4), hv_storvsc(4), hv_vmbus(4)

       To  compile  this  driver  into  the kernel, place the following lines in the system kernel configuration
       file:

             devicehyperv