MFC 309705

hyperv/timesync: Support "sent TC" to improve accuracy.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8723

MFC 302723,302726,302731

302723
hyperv: All Hypercall parameters have same alignment requirement.

Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D7086

302726
hyperv: Signal event input parameter is shared w/ MNF

Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D7087

302731
hyperv/vmbus: Reorganize MNF event sending.

Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D7088

MFC 302617-302621,302623,302629-302631

302617
hyperv/vmbus: Flatten channel message response processing.

Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6914

302618
hyperv/vmbus: Avoid tx_evtflags setting code duplication.

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6915

302619
hyperv/vmbus: Busdma-fy Hypercall signal event input parameter.

Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6916

302620
hyperv: Nuke unused stuffs

Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6917

302621
hyperv/vmbus: Don't be oversmart in default cpu selection.

Pin the channel to cpu0 by default. Drivers having special channel-cpu
mapping requirement should call vmbus_channel_cpu_{set,rr}() themselves.

Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6918

302623
hyperv/vmbus: Minor renaming

Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6919

302629
hyperv/vmbus: Rework vmbus version accessing.

Instead of global variable, vmbus version is accessed through
a vmbus DEVMETHOD now.

Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6953

302630
hyperv/vmbus: Move GPADL index into vmbus_softc

Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6954

302631
hyperv/vmbus: Move channel list to vmbus_softc

Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6956

MFC 302540

hyperv/vmbus: Implement a new set of APIs for post message Hypercall

And use this new APIs for Initial Contact post message Hypercall.
More post message Hypercalls will be converted.

Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6830

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

hyperv: Move timer frequency definition to common place.

And cleanup event timer period settings.

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6597

hyperv: Test features before enabling optional functionalities

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6571