Hyper-V: TLB flush enlightment using hypercall

Currently FreeBSD uses IPI based TLB flushing for remote
TLB flushing. Hyper-V allows hypercalls to flush local and
remote TLB. The use of Hyper-V hype

Hyper-V: TLB flush enlightment using hypercall

Currently FreeBSD uses IPI based TLB flushing for remote
TLB flushing. Hyper-V allows hypercalls to flush local and
remote TLB. The use of Hyper-V hypercalls gives significant
performance improvement in TLB operations.

This patch set during test has shown near to 40 percent
TLB performance improvement.

Also this patch adds rep hypercall implementation as well.

Reviewed by: whu, kib
Tested by: whu
Authored-by: Souradeep Chakrabarti <[email protected]>
Co-Authored-by: Erni Sri Satya Vennela <[email protected]>
MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D45521

(cherry picked from commit 2b887687edc25bb4553f0d8a1183f454a85d413d)

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sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

arm64: Hyper-V: enablement for ARM64 in Hyper-V (Part 3, final)

This is the last part for ARM64 Hyper-V enablement. This includes
commone files and make file changes to enable the ARM64 FreeBSD
gues

arm64: Hyper-V: enablement for ARM64 in Hyper-V (Part 3, final)

This is the last part for ARM64 Hyper-V enablement. This includes
commone files and make file changes to enable the ARM64 FreeBSD
guest on Hyper-V. With this patch, it should be able to build
the ARM64 image and install it on Hyper-V.

Reviewed by: emaste, andrew, whu
Tested by: Souradeep Chakrabarti <[email protected]>
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D36744

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kmem_malloc/free: Use void * instead of vm_offset_t for kernel pointers.

Reviewed by: kib, markj
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D36549

hyperv: Register the MSR-based timecounter during SI_SUB_HYPERVISOR

This reverts commit 9ef7df022a46 ("hyperv: Register hyperv_timecounter
later during boot") and adds a comment explaining why the t

hyperv: Register the MSR-based timecounter during SI_SUB_HYPERVISOR

This reverts commit 9ef7df022a46 ("hyperv: Register hyperv_timecounter
later during boot") and adds a comment explaining why the timecounter
needs to be registered as early as it is.

PR: 259878
Fixes: 9ef7df022a46 ("hyperv: Register hyperv_timecounter later during boot")
Reviewed by: kib
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D33014

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hyperv: Register hyperv_timecounter later during boot

Previously the MSR-based timecounter was registered during
SI_SUB_HYPERVISOR, i.e., very early during boot, and before SI_SUB_LOCK.
After commit

hyperv: Register hyperv_timecounter later during boot

Previously the MSR-based timecounter was registered during
SI_SUB_HYPERVISOR, i.e., very early during boot, and before SI_SUB_LOCK.
After commit 621fd9dcb2d8 this triggers a panic since the timecounter
list lock is not yet initialized.

The hyperv timecounter does not need to be registered so early, so defer
that to SI_SUB_DRIVERS, at the same time the hyperv TSC timecounter is
registered.

Reported by: whu
Approved by: whu
Fixes: 621fd9dcb2d8 ("timecounter: Lock the timecounter list")
MFC after: 1 week
Sponsored by: The FreeBSD Foundation

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Eliminate the arena parameter to kmem_free(). Implicitly this corrects an
error in the function hypercall_memfree(), where the wrong arena was being
passed to kmem_free().

Introduce a per-page flag

Eliminate the arena parameter to kmem_free(). Implicitly this corrects an
error in the function hypercall_memfree(), where the wrong arena was being
passed to kmem_free().

Introduce a per-page flag, VPO_KMEM_EXEC, to mark physical pages that are
mapped in kmem with execute permissions. Use this flag to determine which
arena the kmem virtual addresses are returned to.

Eliminate UMA_SLAB_KRWX. The introduction of VPO_KMEM_EXEC makes it
redundant.

Update the nearby comment for UMA_SLAB_KERNEL.

Reviewed by: kib, markj
Discussed with: jeff
Approved by: re (marius)
Differential Revision: https://reviews.freebsd.org/D16845

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Eliminate kmem_malloc()'s unused arena parameter. (The arena parameter
became unused in FreeBSD 12.x as a side-effect of the NUMA-related
changes.)

Reviewed by: kib, markj
Discussed with: jeff, re@

Eliminate kmem_malloc()'s unused arena parameter. (The arena parameter
became unused in FreeBSD 12.x as a side-effect of the NUMA-related
changes.)

Reviewed by: kib, markj
Discussed with: jeff, re@
Differential Revision: https://reviews.freebsd.org/D16825

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hyperv: Fix boot-up after malloc() returns memory of NX by default now

FreeBSD VM can't boot up on Hyper-V after the recent malloc change in
r335068: Make UMA and malloc(9) return non-executable mem

hyperv: Fix boot-up after malloc() returns memory of NX by default now

FreeBSD VM can't boot up on Hyper-V after the recent malloc change in
r335068: Make UMA and malloc(9) return non-executable memory in most cases.

The hypercall page here must be executable.
Fix the boot-up issue by adding M_EXEC.

PR: 229167
Sponsored by: Microsoft

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Correct comment typo in Hyper-V

PR: 226665
Submitted by: Ryo ONODERA
MFC after: 3 days

hyperv/vmbus: Expose Hyper-V major version.

MFC after: 3 days
Sponsored by: Microsoft

hyperv: Update copyright for the files changed in 2017

MFC after: 3 days
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D11982

hyperv: Use kmem_malloc for hypercall memory due to NX bit change.

Reported by: dexuan@
MFC after: now
Sponsored by: Microsoft

hyperv: Add method to read 64bit Hyper-V specific time value.

MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D9057

hyperv/vmbus: Forward declare static functions

MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7346

hyperv/vmbus: Inclusion cleanup

MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7334

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

It only contains bufring related bits for a while.

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebs

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

It only contains bufring related bits for a while.

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D7281

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hyperv: hv_guid -> struct hyperv_guid.

This paves way for the further cleanup/disentangle.

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D7092

hyperv: Signal event input parameter is shared w/ MNF

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D7087

hyperv: Nuke unused stuffs

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6917

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

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6916

hyperv: Nuke unused stuffs

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6913

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.

MFC after: 1 w

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.

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6830

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hyperv: Move machine dependent bits into machine dependent files.

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6701

hyperv: Rename some cleaned up/almost cleaned up files

MFC after: 1 week
Sponsored by: Microsoft OSTC