From 3abbd337c60591305cbfeb984ff2922c175be37f Mon Sep 17 00:00:00 2001 From: Zhao Yakui Date: Mon, 28 Jan 2008 13:53:21 +0800 Subject: 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 Signed-off-by: Len Brown --- arch/x86/kernel/acpi/processor.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch/x86') diff --git a/arch/x86/kernel/acpi/processor.c b/arch/x86/kernel/acpi/processor.c index a25db514c71..324eb0cab19 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; -- cgit v1.2.3