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authorZhao Yakui <yakui.zhao@intel.com>2008-01-28 13:53:21 +0800
committerLen Brown <len.brown@intel.com>2008-02-02 02:22:43 -0500
commit3abbd337c60591305cbfeb984ff2922c175be37f (patch)
treec76d255ee8b83d64d10eae9a07606009da41dd9c /arch/ia64
parentaa6299926950c8dfe2fea638276cad6def092bc9 (diff)
downloadblackbird-op-linux-3abbd337c60591305cbfeb984ff2922c175be37f.tar.gz
blackbird-op-linux-3abbd337c60591305cbfeb984ff2922c175be37f.zip
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/ia64')
-rw-r--r--arch/ia64/kernel/acpi-processor.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/ia64/kernel/acpi-processor.c b/arch/ia64/kernel/acpi-processor.c
index 5a216c019924..cbe6cee5a550 100644
--- 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;
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