diff options
| author | Zhao Yakui <yakui.zhao@intel.com> | 2008-01-28 06:53:21 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-02 08:22:43 +0100 |
| commit | 3abbd337c60591305cbfeb984ff2922c175be37f (patch) | |
| tree | c76d255ee8b83d64d10eae9a07606009da41dd9c /arch | |
| parent | x86: fix bootup crash in native_read_tsc() (diff) | |
| download | linux-3abbd337c60591305cbfeb984ff2922c175be37f.tar.xz 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')
| -rw-r--r-- | arch/ia64/kernel/acpi-processor.c | 6 | ||||
| -rw-r--r-- | arch/x86/kernel/acpi/processor.c | 6 |
2 files changed, 12 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; 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) 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; |