In the past the turbo disable setting (bit 38) of the
IA32_MISC_ENABLES msr has been package scoped. That means
knocking the turbo disable bit down enabled turbo for the
entire package. Sadly, that's no longer true on all Intel
processors. Therefore, allow non-packaged scoped turbo
setting by introducing the CPU_INTEL_TURBO_NOT_PACKAGE_SCOPED
Kconfig option. It defaults to false which was the original
assumption.
BUG=chrome-os-partner:25014
BRANCH=baytrail
TEST=Built and ran both ways successfully.
Change-Id: I71a31e76ff47878023081fc47da643187517b597
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/182405
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/5047
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
From wikipedia:
Intel Turbo Boost is a technology implemented by Intel in certain
versions of their Nehalem- and Sandy Bridge-based CPUs, including Core
i5 and Core i7 that enables the processor to run above its base
operating frequency via dynamic control of the CPU's "clock rate".
It is activated when the operating system requests the highest
performance state of the processor.
Change-Id: I166ead7c219083006c2b05859eb18749c6fbe832
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/844
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
