acpi: Narrow workaround for broken interrupt settings on x86

Commit 9a7bf07ccdc1 from 2016 introduced a workaround for some broken
BIOSes that specified active-lo instead of active-hi polarity for I

acpi: Narrow workaround for broken interrupt settings on x86

Commit 9a7bf07ccdc1 from 2016 introduced a workaround for some broken
BIOSes that specified active-lo instead of active-hi polarity for ISA
IRQs for UARTs. The workaround assumed that edge-sensitive ISA IRQs
on x86 should always be active-hi. However, some recent AMD systems
actually use active-lo edge-sensitive ISA IRQs (and not just for
UARTs, but also for the keyboard and PS/2 mouse devices) and the
override causes interrupts to be dropped resulting in boot time hangs,
non-working keyboards, etc.

Add a hw.acpi.override_isa_irq_polarity tunable (readable as a sysctl
post-boot) to control this quirk. It can be set to 1 to force enable
the override and 0 to disable it. The log of original message
mentions an Intel motherboard as the sample case, so default the
tunable to 1 on systems with an Intel CPU and 0 otherwise.

Special thanks to Matthias Lanter <freebsd@lanter-it.ch> for tracking
down boot time issues on recent AMD systems to mismatched interrupt
polarity.

PR: 270707
Reported by: aixdroix_OSS@protonmail.com, Michael Dexter
Reported by: mfw_burn@pm.me, Hannes Hfauswedell <h2+fbsdports@fsfe.org>
Reported by: Matthias Lanter <freebsd@lanter-it.ch>
Reported by: William Bulley <web@umich.edu>
Reviewed by: imp, emaste
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D45554

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Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

acpi(4): Correct outdated sysctl

This changes the location of cx_supported sysctl to dev.cpu.N.

PR: 214370
MFC after: 3 days

acpi_cpu: Make device unit numbers match OS CPU IDs.

There are already APIC ID, ACPI ID and OS ID for each CPU. In perfect
world all of those may match, but at least for SuperMicro server boards
no

acpi_cpu: Make device unit numbers match OS CPU IDs.

There are already APIC ID, ACPI ID and OS ID for each CPU. In perfect
world all of those may match, but at least for SuperMicro server boards
none of them do. Plus none of them match the CPU devices listing order
by ACPI. Previous code used the ACPI device listing order to number
cpuX devices. It looked nice from NewBus perspective, but introduced
4th different set of IDs. Extremely confusing one, since in some places
the device unit numbers were treated as OS CPU IDs (coretemp), but not
in others (sysctl dev.cpu.X.%location).

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acpi(4): mention NONE as possible setting for hw.acpi.power_button_state

Reviewed by: manpages (gbe)
Differential Revision: https://reviews.freebsd.org/D29577

Catch up with HEAD (r280229-r284686).

MFH: r282615-r283655

Sponsored by: The FreeBSD Foundation

Merge sync of head

If x86 CPU implementation of the MWAIT instruction reasonably
interacts with interrupts, query ACPI and use MWAIT for entrance into
Cx sleep states. Support C1 "I/O then halt" mode. See Intel'
docu

If x86 CPU implementation of the MWAIT instruction reasonably
interacts with interrupts, query ACPI and use MWAIT for entrance into
Cx sleep states. Support C1 "I/O then halt" mode. See Intel'
document 302223-007 "Intelб╝ Processor Vendor-Specific ACPI Interface
Specification" for description.

Move the acpi_cpu_c1() function into x86/cpu_machdep.c and use
it instead of inlining "sti; hlt" sequence in several places.

In the acpi(4) man page, besides documenting the dev.cpu.N.cx_methods
sysctl, correct the names for dev.cpu.N.{cx_usage,cx_lowest,cx_supported}
sysctls.

Both jkim and avg have some other patches implementing the mwait
functionality; this work is unrelated. Linux does not rely on the
ACPI to provide correct tables describing Cx modes. Instead, the
driver has pre-defined knowledge of the CPU models, it was supplied by
Intel.

Tested by: pho (previous versions)
Sponsored by: The FreeBSD Foundation

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Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

Sync to HEAD@r274766

Merge from head@274682

Remove mostly obsolete hint to disable LAPIC timers.

It is partially covered by new code and partially by new CPUs.

PR: 195016
Submitted by: tobias.rehbein@web.de
MFC after: 1 week

IFC @r269962

Submitted by: Anish Gupta (akgupt3@gmail.com)

Merge head from 7/28

Sync to HEAD@r269943.

Remove ia64.

This includes:
o All directories named *ia64*
o All files named *ia64*
o All ia64-specific code guarded by __ia64__
o All ia64-specific makefile logic
o Mention of ia64 in com

Remove ia64.

This includes:
o All directories named *ia64*
o All files named *ia64*
o All ia64-specific code guarded by __ia64__
o All ia64-specific makefile logic
o Mention of ia64 in comments and documentation

This excludes:
o Everything under contrib/
o Everything under crypto/
o sys/xen/interface
o sys/sys/elf_common.h

Discussed at: BSDcan

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use .Mt to mark up email addresses consistently (final part)

PR: 191174
Submitted by: Franco Fichtner <franco at lastsummer.de>

Fix markup and grammar.

Add note on SYSCTL VARIABLES.

Merge fresh head.

MFC @ r241285

IFC @ r242684

Sync from head