MFC 313732: bhyve: whitespace fix for r313727

MFC r334307, r335103-r335104

r334307:
Simplify macros EFPRINTF and EFFLUSH. [0]
Also stdarg(3) says that each invocation of va_start() must be paired
with a corresponding invocation of va_end() in the same function. [1]

Reported by: Coverity
CID: 1194318[0] and 1194332[1]
Discussed with: jhb
Sponsored by: iXsystems Inc.
Differential Revision: https://reviews.freebsd.org/D15548

r335103:
Fix style(9) space vs tab.

Reviewed by: jhb
Sponsored by: iXsystems Inc.
Differential Revision: https://reviews.freebsd.org/D15774

r335104:
Fix style(9) space vs tab.

Reviewed by: jhb
Sponsored by: iXsystems Inc.
Differential Revision: https://reviews.freebsd.org/D15768

MFC r326276:

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.

MFC 313727, 317483
In addition, replace the missing caph routines with
small helper functions (bhyverun.c) or an open-coded
replacement (uart_emul.c)

313727 Capsicumize bhyve
317483 Allow CAP_MMAP_RW on memfd for PCI passthru

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

Handle single-byte reads from the bvmcons port (0x220) by returning
0xff. Some guests may attempt to read from this port to identify
psuedo-PNP ISA devices. (The ie(4) driver in FreeBSD/i386 is one
example.)

Reviewed by: grehan

Mark the I/O ports used by the bhyve console and debug devices as system
resources.

MFC after: 1 week

Improve PCI BAR emulation:
- Respect the MEMEN and PORTEN bits in the command register
- Allow the guest to reprogram the address decoded by the BAR

Submitted by: Gopakumar T
Obtained from: NetApp

Add svn properties to the recently merged bhyve source files.

The pre-commit hook will not allow any commits without the svn:keywords
property in head.

Merge projects/bhyve to head.

'bhyve' was developed by grehan@ and myself at NetApp (thanks!).

Special thanks to Peter Snyder, Joe Caradonna and Michael Dexter for their
support and encouragement.

Obtained from: NetApp

Present the bvm console device to the guest only when explicitly requested via
the "-b" command line option.

Reviewed by: grehan
Obtained from: NetApp

Changes to allow the GENERIC+bhye kernel built from this branch to
run as a 1/2 CPU guest on an 8.1 bhyve host.

bhyve/inout.c
inout.h
fbsdrun.c
- Rather than exiting on accesses to unhandled i/o ports, emulate
hardware by returning -1 on reads and ignoring writes to unhandled
ports. Support the previous mode by allowing a 'strict' parameter
to be set from the command line.
The 8.1 guest kernel was vastly cut down from GENERIC and had no
ISA devices. Booting GENERIC exposes a massive amount of random
touching of i/o ports (hello syscons/vga/atkbdc).

bhyve/consport.c
dev/bvm/bvm_console.c
- implement a simplistic signature for the bvm console by returning
'bv' for an inw on the port. Also, set the priority of the console
to CN_REMOTE if the signature was returned. This works better in
an environment where multiple consoles are in the kernel (hello syscons)

bhyve/rtc.c
- return 0 for the access to RTC_EQUIPMENT (yes, you syscons)

amd64/vmm/x86.c
x86.h
- hide a bunch more CPUID leaf 1 bits from the guest to prevent
cpufreq drivers from probing.
The next step will be to move CPUID handling completely into
user-space. This will allow the full spectrum of changes from
presenting a lowest-common-denominator CPU type/feature set, to
exposing (almost) everything that the host can support.

Reviewed by: neel
Obtained from: NetApp

First cut to port bhyve, vmmctl, and libvmmapi to HEAD.

Import of bhyve hypervisor and utilities, part 1.
vmm.ko - kernel module for VT-x, VT-d and hypervisor control
bhyve - user-space sequencer and i/o emulation
vmmctl - dump of hypervisor register state
libvmm - front-end to vmm.ko chardev interface

bhyve was designed and implemented by Neel Natu.

Thanks to the following folk from NetApp who helped to make this available:
Joe CaraDonna
Peter Snyder
Jeff Heller
Sandeep Mann
Steve Miller
Brian Pawlowski