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linux/include/acpi
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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>
2010-07-22 16:54:27 -04:00
..
platform ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
acexcep.h ACPICA: Fix namestring associated with AE_NO_HANDLER exception 2010-06-12 00:54:36 -04:00
acnames.h ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
acoutput.h ACPICA: Enhance configuration for output of AML Debug Object 2010-04-20 10:42:49 -04:00
acpi_bus.h ACPI: pci_root: save downstream bus range 2010-04-04 00:29:41 -04:00
acpi_drivers.h ACPI: pci_root: pass acpi_pci_root to arch-specific scan 2010-04-04 00:29:53 -04:00
acpi_numa.h ACPI: misc cleanups 2008-02-07 03:33:23 -05:00
acpi.h ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
acpiosxf.h ACPICA: Update/clarify some parameter names associated with acpi_handle 2010-05-06 03:05:54 -04:00
acpixf.h ACPICA: Truncate I/O addresses to 16 bits for Windows compatibility 2010-06-12 00:55:50 -04:00
acrestyp.h ACPICA: Remove obsolete ACPI_INTEGER (acpi_integer) type 2010-01-22 12:30:06 -05:00
actbl1.h ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
actbl2.h ACPICA: Add support for MCHI table 2010-04-20 10:42:50 -04:00
actbl.h ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
actypes.h Merge branch 'gpe-regression-fixes' into release 2010-06-12 00:51:49 -04:00
apei.h ACPI, APEI, Error Record Serialization Table (ERST) support 2010-05-19 22:41:31 -04:00
atomicio.h ACPI, IO memory pre-mapping and atomic accessing 2010-05-19 11:40:03 -04:00
button.h ACPI: make ACPI button funcs no-ops if not built in 2009-09-17 14:48:23 -07:00
container.h
hed.h ACPI Hardware Error Device (PNP0C33) support 2010-05-19 22:40:24 -04:00
pdc_intel.h ACPI: Enable bit 11 in _PDC to advertise hw coord 2009-02-07 00:41:14 -05:00
processor.h ACPI: skip checking BM_STS if the BIOS doesn't ask for it 2010-07-22 16:54:27 -04:00
reboot.h Add the ability to reset the machine using the RESET_REG in ACPI's FADT table. 2008-07-16 23:27:08 +02:00
video.h ACPI: Export EDID blocks to the kernel 2010-04-19 15:56:32 -04:00