Subject: ACPI: Set the bif of ACPI_PDC_SMP_T_SWCOORD for _PDC >From : Zhao Yakui <yakui.zhao@xxxxxxxxx> The bit of ACPI_PDC_SMP_T_SWCOORD is set so that OSPM is capable of native ACPI throttling software coordination for mutli-processors using the _TSD information. Signed-off-by: Zhao Yakui <yakui.zhao@xxxxxxxxx> --- arch/ia64/kernel/acpi-processor.c | 6 ++++++ arch/x86/kernel/acpi/processor.c | 6 ++++++ 2 files changed, 12 insertions(+) Index: linux-2.6/arch/ia64/kernel/acpi-processor.c =================================================================== --- linux-2.6.orig/arch/ia64/kernel/acpi-processor.c +++ linux-2.6/arch/ia64/kernel/acpi-processor.c @@ -45,6 +45,12 @@ static void init_intel_pdc(struct acpi_p 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; Index: linux-2.6/arch/x86/kernel/acpi/processor.c =================================================================== --- linux-2.6.orig/arch/x86/kernel/acpi/processor.c +++ linux-2.6/arch/x86/kernel/acpi/processor.c @@ -46,6 +46,12 @@ static void init_intel_pdc(struct acpi_p 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; - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
