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| author | Zhao Yakui <yakui.zhao@intel.com> | 2008-01-28 13:53:21 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-02 02:22:43 -0500 |
| commit | 3abbd337c60591305cbfeb984ff2922c175be37f (patch) | |
| tree | c76d255ee8b83d64d10eae9a07606009da41dd9c /arch/x86 | |
| parent | aa6299926950c8dfe2fea638276cad6def092bc9 (diff) | |
| download | op-kernel-dev-3abbd337c60591305cbfeb984ff2922c175be37f.zip op-kernel-dev-3abbd337c60591305cbfeb984ff2922c175be37f.tar.gz | |
ACPI: Set _PSD ACPI_PDC_SMP_T_SWCOORD
The ACPI_PDC_SMP_T_SWCOORD bit is set by and OS that is capable of
native ACPI throttling software coordination for mutli-processors
using the _TSD information.
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/acpi/processor.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/acpi/processor.c b/arch/x86/kernel/acpi/processor.c index a25db51..324eb0c 100644 --- a/arch/x86/kernel/acpi/processor.c +++ b/arch/x86/kernel/acpi/processor.c @@ -46,6 +46,12 @@ static void init_intel_pdc(struct acpi_processor *pr, struct cpuinfo_x86 *c) buf[1] = 1; buf[2] = ACPI_PDC_C_CAPABILITY_SMP; + /* + * The default of PDC_SMP_T_SWCOORD bit is set for intel x86 cpu so + * that OSPM is capable of native ACPI throttling software + * coordination using BIOS supplied _TSD info. + */ + buf[2] |= ACPI_PDC_SMP_T_SWCOORD; if (cpu_has(c, X86_FEATURE_EST)) buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP; |
