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authorZhao Yakui <yakui.zhao@intel.com>2008-01-28 00:53:21 -0500
committerLen Brown <len.brown@intel.com>2008-02-02 02:22:43 -0500
commit3abbd337c60591305cbfeb984ff2922c175be37f (patch)
treec76d255ee8b83d64d10eae9a07606009da41dd9c /arch/x86/kernel/acpi/processor.c
parentaa6299926950c8dfe2fea638276cad6def092bc9 (diff)
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/kernel/acpi/processor.c')
-rw-r--r--arch/x86/kernel/acpi/processor.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/acpi/processor.c b/arch/x86/kernel/acpi/processor.c
index a25db514c719..324eb0cab19c 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)
46 buf[1] = 1; 46 buf[1] = 1;
47 buf[2] = ACPI_PDC_C_CAPABILITY_SMP; 47 buf[2] = ACPI_PDC_C_CAPABILITY_SMP;
48 48
49 /*
50 * The default of PDC_SMP_T_SWCOORD bit is set for intel x86 cpu so
51 * that OSPM is capable of native ACPI throttling software
52 * coordination using BIOS supplied _TSD info.
53 */
54 buf[2] |= ACPI_PDC_SMP_T_SWCOORD;
49 if (cpu_has(c, X86_FEATURE_EST)) 55 if (cpu_has(c, X86_FEATURE_EST))
50 buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP; 56 buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP;
51 57