CVS commit: src/sys/arch/x86/acpi

[Jukka Ruohonen <jruoho%netbsd.org@localhost>]

Module Name:    src
Committed By:   jruoho
Date:           Sat Aug 21 05:10:43 UTC 2010

Modified Files:
        src/sys/arch/x86/acpi: acpi_cpu_md.c

Log Message:
Add a quirk for Turbo Boost.

It was observed that at least Sverre Froyen's ThinkPad T500 reports values
that do not match readings from the IA32_PERF_STATUS register. This only
applied to the P0-state. Thus, for now, skip the status check if Turbo
Boost has been detected and the requested state is P0.

This needs to be revisited once Turbo Boost actually works in NetBSD. It is
unclear whether this is a BIOS flaw or not; these values may well be what we
get from IA32_PERF_STATUS once the CPU actually uses the +133.33 MHz boost.


To generate a diff of this commit:
cvs rdiff -u -r1.23 -r1.24 src/sys/arch/x86/acpi/acpi_cpu_md.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.