MFC 310048,310101

310048
hyperv: Implement "enlightened" time counter, which is rdtsc based.

Reviewed by: kib
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8763

310101
hyperv: Allow userland to ro-mmap reference TSC page

This paves way to implement VDSO for the enlightened time counter.

Reviewed by: kib
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8768

MFC 309705

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

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

MFC 303283

hyperv/vmbus: Rename hv_vmbus_priv.h to vmbus_brvar.h

It only contains bufring related bits for a while.

Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D7281

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.

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

MFC 300825,300827,300830,300831,300832,300834

300825
hyperv: Move CPUID related bits to hyperv_reg.h and give them clean name

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6565

300827
hyperv: Move timer related MSRs into hyperv_reg.h

And avoid bit fields for event timer.

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6566

300830
hyperv/vmbus: Move MSR EOM to hyperv_reg.h

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6567

300831
hyperv: GC unneeded bits

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6568

300832
hyperv: Clean up Hyper-V timecounter a bit.

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6569

300834
hyperv: Test features before enabling optional functionalities

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

MFC 300654,300655,300708

300654
hyperv/vmbus: Rework SynIC setup and teardown

- Avoid bit fields.
- Fix SINT setup (preserve required bits).

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6529

300655
hyperv: Preserve required bits when disable Hypercall

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6530

300708
hyperv: Rework guest id settings according to Hyper-V spec

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6553

MFC 300480,300481,300486

300480
hyperv: Move Hypercall setup to an early place.

It does not belong to the vmbus.

While I'm here rework the Hypercall setup, e.g. use busdma(9)
and avoid bit fields.

Discussed with: Jun Su <junsu microsoft com>
MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6445

300481
hyperv/vmbus: Declare Synic message and event w/ proper types

Avoid ugly casts.

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6446

300486
hyperv/vmbus: Get rid of vmbus_devp

While I'm here, nuke useless print in vmbus_attach().

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6447