Remove residual blank line at start of Makefile

This is a residual of the $FreeBSD$ removal.

MFC After: 3 days (though I'll just run the command on the branches)
Sponsored by: Netflix

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 <schakrabarti@microsoft.com>
Co-Authored-by: Erni Sri Satya Vennela <ernis@microsoft.com>
MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D45521

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sys: Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\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 <schakrabarti@microsoft.com>
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D36744

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Fix some modules to export more used symbols

and remove non-present symbols that are now reported by kmod_syms.awk.

Reviewed by: emaste
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differ

Fix some modules to export more used symbols

and remove non-present symbols that are now reported by kmod_syms.awk.

Reviewed by: emaste
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D32878

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hyperv: Fix vmbus after the i386 4/4 split

The vmbus ISR needs to live in a trampoline. Dynamically allocating a
trampoline at driver initialization time poses some difficulties due to
the fact tha

hyperv: Fix vmbus after the i386 4/4 split

The vmbus ISR needs to live in a trampoline. Dynamically allocating a
trampoline at driver initialization time poses some difficulties due to
the fact that the KENTER macro assumes that the offset relative to
tramp_idleptd is fixed at static link time. Another problem is that
native_lapic_ipi_alloc() uses setidt(), which assumes a fixed trampoline
offset.

Rather than fight this, move the Hyper-V ISR to i386/exception.s. Add a
new HYPERV kernel option to make this optional, and configure it by
default on i386. This is sufficient to make use of vmbus(4) after the
4/4 split. Note that vmbus cannot be loaded dynamically and both the
HYPERV option and device must be configured together. I think this is
not too onerous a requirement, since vmbus(4) was previously
non-functional.

Reported by: Harry Schmalzbauer <freebsd@omnilan.de>
Tested by: Harry Schmalzbauer <freebsd@omnilan.de>
Reviewed by: whu, kib
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D30577

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Move most of the contents of opt_compat.h to opt_global.h.

opt_compat.h is mentioned in nearly 180 files. In-progress network
driver compabibility improvements may add over 100 more so this is
close

Move most of the contents of opt_compat.h to opt_global.h.

opt_compat.h is mentioned in nearly 180 files. In-progress network
driver compabibility improvements may add over 100 more so this is
closer to "just about everywhere" than "only some files" per the
guidance in sys/conf/options.

Keep COMPAT_LINUX32 in opt_compat.h as it is confined to a subset of
sys/compat/linux/*.c. A fake _COMPAT_LINUX option ensure opt_compat.h
is created on all architectures.

Move COMPAT_LINUXKPI to opt_dontuse.h as it is only used to control the
set of compiled files.

Reviewed by: kib, cem, jhb, jtl
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14941

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Rename assym.s to assym.inc

assym is only to be included by other .s files, and should never
actually be assembled by itself.

Reviewed by: imp, bdrewery (earlier)
Sponsored by: The FreeBSD Foundati

Rename assym.s to assym.inc

assym is only to be included by other .s files, and should never
actually be assembled by itself.

Reviewed by: imp, bdrewery (earlier)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D14180

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Move assym.s to DPSRCS in vmbus module

assym.s is only to be included by other .s files, and should not
actually be assembled by itself.

Merge ^/head r317971 through r318379.

hyperv/vmbus: Reorganize vmbus device tree

For GEN1 Hyper-V, vmbus is attached to pcib0, which contains the
resources for PCI passthrough and SR-IOV. There is no
acpi_syscontainer0 on GEN1 Hyper-V.

hyperv/vmbus: Reorganize vmbus device tree

For GEN1 Hyper-V, vmbus is attached to pcib0, which contains the
resources for PCI passthrough and SR-IOV. There is no
acpi_syscontainer0 on GEN1 Hyper-V.

For GEN2 Hyper-V, vmbus is attached to acpi_syscontainer0, which
contains the resources for PCI passthrough and SR-IOV. There is
no pcib0 on GEN2 Hyper-V.

The ACPI VMBUS device now only holds its _CRS, which is empty as
of this commit; its existence is mainly for upward compatibility.

Device tree structure is suggested by jhb@.

Tested-by: dexuan@
Collabrated-wth: dexuan@
MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D10565

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sys/modules: normalize .CURDIR-relative paths to SRCTOP

This simplifies make output/logic

Tested with: `cd sys/modules; make ALL_MODULES=` on amd64
MFC after: 1 month
Sponsored by: Dell EMC Isilon

Merge ^/head r308491 through r308841.

hyperv/pcib: Fix the build for some kernel configs

Add the dependency on pci explicitly for the pcib and vmbus drivers.
The related Makefiles are updated accordingly too.

Reviewed by: sephe
Approve

hyperv/pcib: Fix the build for some kernel configs

Add the dependency on pci explicitly for the pcib and vmbus drivers.
The related Makefiles are updated accordingly too.

Reviewed by: sephe
Approved by: sephe (mentor)
MFC after: 1 week
Sponsored by: Microsoft

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Merge ^/head r306412 through r306905.

hyperv/vmbus: Add missing vmbus_if.c to module build.

MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8067

Merge ^/head r303250 through r304235.

MFhead @ r304038

hyperv/vmbus: Add APIs for various types of transactions.

Reviewed by: Jun Su <junsu microsoft com>
MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7456

opt_apic.h is only used on i386.

MFC after: 3 days
Sponsored by: EMC / Isilon Storage Division

hyperv/vmbus: Rename cleaned up bufring code

MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7318

hyperv/vmbus: Rename laundered vmbus channel code

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D7232

hyperv/vmbus: Merge hv_channel_mgmt.c into hv_channel.c

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D7126

hyperv/vmbus: Merge hv_connection.c into hv_channel.c

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D7004

hyperv/vmbus: Rework vmbus version accessing.

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

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revisi

hyperv/vmbus: Rework vmbus version accessing.

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

MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6953

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