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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-09-02 10:56:56 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-15 16:51:25 +0200 |
| commit | a8303aaf2b2f74714db6d204ab4fcb810942664e (patch) | |
| tree | 12ac6322a7d5e66f1c6bef2562771568288ad68f /arch/x86/kernel/cpu/intel.c | |
| parent | d6a59aa3a2b1ca8411884c833a313b33b5f76e20 (diff) | |
| download | linux-stable-a8303aaf2b2f74714db6d204ab4fcb810942664e.tar.gz linux-stable-a8303aaf2b2f74714db6d204ab4fcb810942664e.tar.bz2 linux-stable-a8303aaf2b2f74714db6d204ab4fcb810942664e.zip | |
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>
Diffstat (limited to 'arch/x86/kernel/cpu/intel.c')
| -rw-r--r-- | arch/x86/kernel/cpu/intel.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 80a722a071b5..40e1835b35e8 100644 --- 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) { |