[PATCH 1/2] CPUFREQ: Enable acpi-cpufreq driver for VIA/Centaur CPUs

Harald Welte
2009-06-08T10:30:22Z

The VIA/Centaur C7, C7-M and Nano CPU's all support ACPI based cpu p-states
using a MSR interface. The Linux driver just never made use of it, since in
addition to the check for the EST flag it also checked if the vendor is Intel.

Signed-off-by: Harald Welte <HaraldWelte@viatech.com>
---
arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index 208ecf6..ee03585 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -90,7 +90,8 @@ static int check_est_cpu(unsigned int cpuid)
{
struct cpuinfo_x86 *cpu = &cpu_data(cpuid);

- if (cpu->x86_vendor != X86_VENDOR_INTEL ||
+ if ((cpu->x86_vendor != X86_VENDOR_INTEL &&
+ cpu->x86_vendor != X86_VENDOR_CENTAUR) ||
!cpu_has(cpu, X86_FEATURE_EST))
return 0;

--
1.6.2.4