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Len Brown 718be4aaf3 ACPI: skip checking BM_STS if the BIOS doesn't ask for it ... It turns out that there is a bit in the _CST for Intel FFH C3 that tells the OS if we should be checking BM_STS or not. Linux has been unconditionally checking BM_STS. If the chip-set is configured to enable BM_STS, it can retard or completely prevent entry into deep C-states -- as illustrated by turbostat: http://userweb.kernel.org/~lenb/acpi/utils/pmtools/turbostat/ ref: Intel Processor Vendor-Specific ACPI Interface Specification table 4 "_CST FFH GAS Field Encoding" Bit 1: Set to 1 if OSPM should use Bus Master avoidance for this C-state https://bugzilla.kernel.org/show_bug.cgi?id=15886 Signed-off-by: Len Brown <len.brown@intel.com>		15 years ago
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platform	…
acexcep.h	…
acnames.h	…
acoutput.h	…
acpi.h	…
acpi_bus.h	…
acpi_drivers.h	…
acpi_numa.h	…
acpiosxf.h	…
acpixf.h	ACPICA: Truncate I/O addresses to 16 bits for Windows compatibility	15 years ago
acrestyp.h	…
actbl.h	…
actbl1.h	…
actbl2.h	…
actypes.h	…
apei.h	…
atomicio.h	…
button.h	…
container.h	…
hed.h	…
pdc_intel.h	…
processor.h	ACPI: skip checking BM_STS if the BIOS doesn't ask for it	15 years ago
reboot.h	…
video.h	…