git: hyperv: Implement Hyper-V reference TSC cputimer.

[Sepherosa Ziehau]

commit c6b7218831be34afc3c711f3808a2c28e537112d
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Tue Dec 20 10:50:15 2016 +0800

    hyperv: Implement Hyper-V reference TSC cputimer.
    
    This one is at least 2 times faster than its rdmsr counterpart.
    
    Obtained-from: FreeBSD

Summary of changes:
 sys/dev/virtual/hyperv/vmbus/hyperv.c              |   6 +
 sys/dev/virtual/hyperv/vmbus/hyperv_machdep.h      |   2 +
 sys/dev/virtual/hyperv/vmbus/hyperv_reg.h          |  17 +++
 .../virtual/hyperv/vmbus/x86_64/hyperv_machdep.c   | 161 +++++++++++++++++++++
 4 files changed, 186 insertions(+)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/c6b7218831be34afc3c711f3808a2c28e537112d


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