Commit Graph

12 Commits

Author SHA1 Message Date
Hiren Panchasara
46b29ff94a Adding a detach method to p4tcc driver.
PR:	118739
Submitted by:	Dan Lukes <dan@obluda.cz> (earlier version)
Reviewed by:	jhb
Approved by:	sbruno (mentor)
MFC after:	1 week
2013-05-10 22:43:27 +00:00
Eitan Adler
a8de37b024 This isn't functionally identical. In some cases a hint to disable
unit 0 would in fact disable all units.

This reverts r241856

Approved by: cperciva (implicit)
2012-10-22 13:06:09 +00:00
Eitan Adler
76b7512247 Now that device disabling is generic, remove extraneous code from the
device drivers that used to provide this feature.

Reviewed by:	des
Approved by:	cperciva
MFC after:	1 week
2012-10-22 03:41:14 +00:00
Alexander Kabaev
2f42a9bf0d Fix apparent logic reversal in setting the 'auto_mode' flag.
MFC after: 2 weeks
2012-02-26 21:24:27 +00:00
Jung-uk Kim
43d645f96b Use ACPI-supplied CPU frequencies instead of estimated ones as we are about
to use other values from the same table anyway.

MFC after:	3 days
2011-04-27 00:32:35 +00:00
Jung-uk Kim
3453537fa5 Use atomic load & store for TSC frequency. It may be overkill for amd64 but
safer for i386 because it can be easily over 4 GHz now.  More worse, it can
be easily changed by user with 'machdep.tsc_freq' tunable (directly) or
cpufreq(4) (indirectly).  Note it is intentionally not used in performance
critical paths to avoid performance regression (but we should, in theory).
Alternatively, we may add "virtual TSC" with lower frequency if maximum
frequency overflows 32 bits (and ignore possible incoherency as we do now).
2011-04-07 23:28:28 +00:00
Jung-uk Kim
49abdda9b7 Set C1 "I/O then Halt" capability bit for Intel EIST. Some broken BIOSes
refuse to load external SSDTs if this bit is unset for _PDC.  It seems Linux
and OpenSolaris did the same long ago.

MFC after:	1 week
2011-02-25 23:14:24 +00:00
Andriy Gapon
40934baa60 hwpstate: use CPU_FOREACH when binding to all available processors
Also, add a comment mentioning _PSD - on some systems it's enough to
put one logical CPU into a particular P-state to make other CPUs in
the same domain to enter that P-state.

Also, call sched_unbind() after the loop - sched_bind() automatically
rebinds from previous CPU to a new one, and the new arrangement of code
is safer against early loop exit.

Plus one minor style nit.

MFC after:	10 days
2010-11-16 12:43:45 +00:00
Andriy Gapon
b3fa872420 make it possible to actually enable hwpstate_verbose
Either via the tunable or the sysctl.

MFC after:	3 days
2010-11-11 17:30:49 +00:00
Alexander Motin
c59528330a Few whitespace cleanups and comments tunings.
Submitted by:	arundel
2010-09-16 02:59:25 +00:00
Alexander Motin
5ec55931d6 Core i5, same as previously Core2Duo, found to not set P-state for single
core lower then set on other cores. Do not try to test P-states on attach
on SMP systems. It is hopeless now and will just pollute verbose logs.
If needed, check still can be forced via loader tunable.
2010-06-19 13:09:42 +00:00
Attilio Rao
3258030144 Introduce the new kernel sub-tree x86 which should contain all the code
shared and generalized between our current amd64, i386 and pc98.

This is just an initial step that should lead to a more complete effort.
For the moment, a very simple porting of cpufreq modules, BIOS calls and
the whole MD specific ISA bus part is added to the sub-tree but ideally
a lot of code might be added and more shared support should grow.

Sponsored by:	Sandvine Incorporated
Reviewed by:	emaste, kib, jhb, imp
Discussed on:	arch
MFC:		3 weeks
2010-02-25 14:13:39 +00:00