Merge from head

IFC @ r254014

IFC @253398

IFC @ r252763

Add "amdfam10" to the supported CPU types for amd64. This complements
r251691 and 251692.

Merge fresh head.

Add a missing comma.

- Document GCC support for AMD Family 10h processors (amdfam10).
- Document Clang support for AMD Jaguar processors (btver2).

Fix examples for overriding INSTALL to not suggest hardcoding
'install' since it breaks buildworld after the introduction and
use of 'install -l' in r245752. Overriding INSTALL causes
/usr/bin/instal

Fix examples for overriding INSTALL to not suggest hardcoding
'install' since it breaks buildworld after the introduction and
use of 'install -l' in r245752. Overriding INSTALL causes
/usr/bin/install to be used instead of the proper
/usr/src/tools/install.sh which handles the new flag.

Approved by: bapt
MFC after: 2 weeks

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sync from head

Retire the mislabeled ENABLE_SUID_SSH knob.

IFC @247348.

Sync with HEAD.

IFC @ r244983.

Remove 'dangerous' instructions from the example make.conf.
Clarify when and why these might be used and that this isn't a supported
configuration.

PR: docs/144488
Submitted by: amdmi3
Approved by:

Remove 'dangerous' instructions from the example make.conf.
Clarify when and why these might be used and that this isn't a supported
configuration.

PR: docs/144488
Submitted by: amdmi3
Approved by: cperciva (implicit)
MFC after: 2 weeks

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IFC @r243836

Tidy up bsd.cpu.mk for X86 CPUs:

- Do not limit recent processors to "prescott" class for i386 target. There
is no reason for this hack because clang is default now. On top of that, it
will only g

Tidy up bsd.cpu.mk for X86 CPUs:

- Do not limit recent processors to "prescott" class for i386 target. There
is no reason for this hack because clang is default now. On top of that, it
will only grow indefinitely over time.
- Add more CPUTYPEs, i.e., "athlon-fx", "core-avx2", "atom", "penryn", and
"yonah". Note "penryn" and "yonah" are intentionally undocumented because
they are not supported by gcc and marked deprecated by clang.
- Add more CPUTYPE aliases, i.e., "barcelona" (-> amdfam10), "westmere" and
"nehalem" (-> corei7). Note these are intentionally undocumented because
they are not supported by (base) gcc and/or clang. However, LLVM (backend)
seems to "know" the differences. Most likely, they were deprecated with
other vendor code names and clang did not bother implementing them at all.
- Add i686 to MACHINE_CPU for "c3-2" (VIA Nehemiah). Both gcc & clang treat
it like an i686-class processor.
- Add IDT "winchip2" and "winchip-c6" for completeness (undocumented).
- Order processors per make.conf example, i.e., CPU vendors and models.
- Tidy up make.conf example, i.e., remove "by gcc" (because we have aliases)
and remove "prescott" from AMD64 architecture (because it is not correct).

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Remove fictitious support for 80386-class CPUs from bsd.cpu.mk and make(1).
It was removed from head more than 8 years ago (see r137784 and r137785).

Reviewed by: imp, delphij, dim

MFC

MFC @ r241285

Clean up and update comments for CPUTYPE.

Requested by: rdivacky

IFC @ r242684

Sync from head

Remove documentation and www cvsup files as they are no longer useful
with the switch to subversion.

Approved by: gjb (man pages)
Approved by: cperciva (example files, implicit)
MFC after: 1 week

IFC @ r234692

sys/amd64/include/cpufunc.h
sys/amd64/include/fpu.h
sys/amd64/amd64/fpu.c
sys/amd64/vmm/vmm.c

- Add API to allow vmm FPU state init/save/restore.

FP stuff discussed with: kib