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>

diff --git a/arch/ia64/kernel/acpi-processor.c b/arch/ia64/kernel/acpi-processor.c
index 5a216c0..cbe6cee 100644 (file)
--- a/arch/ia64/kernel/acpi-processor.c
+++ b/arch/ia64/kernel/acpi-processor.c
@@ -45,6 +45,12 @@ static void init_intel_pdc(struct acpi_processor *pr)
        buf[0] = ACPI_PDC_REVISION_ID;
        buf[1] = 1;
        buf[2] = ACPI_PDC_EST_CAPABILITY_SMP;
+       /*
+        * The default of PDC_SMP_T_SWCOORD bit is set for IA64 cpu so
+        * that OSPM is capable of native ACPI throttling software
+        * coordination using BIOS supplied _TSD info.
+        */
+       buf[2] |= ACPI_PDC_SMP_T_SWCOORD;
 
        obj->type = ACPI_TYPE_BUFFER;
        obj->buffer.length = 12;

diff --git a/arch/x86/kernel/acpi/processor.c b/arch/x86/kernel/acpi/processor.c
index a25db51..324eb0c 100644 (file)
--- 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;