x86: Move APERF/MPERF into a X86_FEATURE

Move the APERFMPERF capacility into a X86_FEATURE flag so that it
can be used outside of the acpi cpufreq driver.

Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Yanmin <yanmin_zhang@linux.intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: cpufreq@vger.kernel.org
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 847fee6..9cfc88b 100644 (file)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -96,6 +96,7 @@
 #define X86_FEATURE_CLFLUSH_MONITOR (3*32+25) /* "" clflush reqd with monitor */
 #define X86_FEATURE_EXTD_APICID        (3*32+26) /* has extended APICID (8 bits) */
 #define X86_FEATURE_AMD_DCM     (3*32+27) /* multi-node processor */
+#define X86_FEATURE_APERFMPERF (3*32+28) /* APERFMPERF */
 
 /* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
 #define X86_FEATURE_XMM3       (4*32+ 0) /* "pni" SSE-3 */

diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index ae9b503..509e6a7 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -60,7 +60,6 @@ enum {
 };
 
 #define INTEL_MSR_RANGE                (0xffff)
-#define CPUID_6_ECX_APERFMPERF_CAPABILITY      (0x1)
 
 struct acpi_cpufreq_data {
        struct acpi_processor_performance *acpi_data;
@@ -731,12 +730,8 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
        acpi_processor_notify_smm(THIS_MODULE);
 
        /* Check for APERF/MPERF support in hardware */
-       if (c->x86_vendor == X86_VENDOR_INTEL && c->cpuid_level >= 6) {
-               unsigned int ecx;
-               ecx = cpuid_ecx(6);
-               if (ecx & CPUID_6_ECX_APERFMPERF_CAPABILITY)
-                       acpi_cpufreq_driver.getavg = get_measured_perf;
-       }
+       if (cpu_has(c, X86_FEATURE_APERFMPERF))
+               acpi_cpufreq_driver.getavg = get_measured_perf;
 
        dprintk("CPU%u - ACPI performance management activated.\n", cpu);
        for (i = 0; i < perf->state_count; i++)

diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 80a722a..40e1835 100644 (file)
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -350,6 +350,12 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
                        set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON);
        }
 
+       if (c->cpuid_level > 6) {
+               unsigned ecx = cpuid_ecx(6);
+               if (ecx & 0x01)
+                       set_cpu_cap(c, X86_FEATURE_APERFMPERF);
+       }
+
        if (cpu_has_xmm2)
                set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
        if (cpu_has_ds) {