From 1fe54b320461ae1cab23fd09dbd3633d770e2e92 Mon Sep 17 00:00:00 2001 From: Keir Fraser Date: Mon, 16 Jun 2008 10:36:24 +0100 Subject: [PATCH] x86: Back port from latest Linux kernel to enable C2/C3 entry via MWAIT Current xen-linux (2.6.18) not include support for Cx MWAIT entry method. Back port from latest Linux kernel (already there since 2.6.23). Without this patch, _CST method couldn't get C states with FFH address space type. Signed-off-by: Wei Gang --- include/acpi/pdc_intel.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/acpi/pdc_intel.h b/include/acpi/pdc_intel.h index c5472be6..8b5837c2 100644 --- a/include/acpi/pdc_intel.h +++ b/include/acpi/pdc_intel.h @@ -13,6 +13,7 @@ #define ACPI_PDC_SMP_C_SWCOORD (0x0040) #define ACPI_PDC_SMP_T_SWCOORD (0x0080) #define ACPI_PDC_C_C1_FFH (0x0100) +#define ACPI_PDC_C_C2C3_FFH (0x0200) #define ACPI_PDC_EST_CAPABILITY_SMP (ACPI_PDC_SMP_C1PT | \ ACPI_PDC_C_C1_HALT | \ @@ -25,6 +26,8 @@ #define ACPI_PDC_C_CAPABILITY_SMP (ACPI_PDC_SMP_C2C3 | \ ACPI_PDC_SMP_C1PT | \ - ACPI_PDC_C_C1_HALT) + ACPI_PDC_C_C1_HALT | \ + ACPI_PDC_C_C1_FFH | \ + ACPI_PDC_C_C2C3_FFH) #endif /* __PDC_INTEL_H__ */ -- 2.39.5