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| author | Borislav Petkov <borislav.petkov@amd.com> | 2010-03-31 21:56:43 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-04-09 14:05:50 -0700 |
| commit | d65ad45cd82a0db9544469b8c54f5dc5cafbb2d8 (patch) | |
| tree | 35055e3261c6c75e0d5bd6df00603233f8f47fea | |
| parent | 73860c6b2fd159a35637e233d735e36887c266ad (diff) | |
| download | lwn-d65ad45cd82a0db9544469b8c54f5dc5cafbb2d8.tar.gz lwn-d65ad45cd82a0db9544469b8c54f5dc5cafbb2d8.zip | |
x86: Unify APERF/MPERF support
Initialize this CPUID flag feature in common code. It could be made a
standalone function later, maybe, if more functionality is duplicated.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <1270065406-1814-4-git-send-email-bp@amd64.org>
Reviewed-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| -rw-r--r-- | arch/x86/kernel/cpu/addon_cpuid_features.c | 8 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/intel.c | 6 |
2 files changed, 8 insertions, 6 deletions
diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c index ead2a1cfa570..fd1fc1902a47 100644 --- a/arch/x86/kernel/cpu/addon_cpuid_features.c +++ b/arch/x86/kernel/cpu/addon_cpuid_features.c @@ -54,6 +54,14 @@ void __cpuinit init_scattered_cpuid_features(struct cpuinfo_x86 *c) if (regs[cb->reg] & (1 << cb->bit)) set_cpu_cap(c, cb->feature); } + + /* + * common AMD/Intel features + */ + if (c->cpuid_level >= 6) { + if (cpuid_ecx(6) & 0x1) + set_cpu_cap(c, X86_FEATURE_APERFMPERF); + } } /* leaf 0xb SMT level */ diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 7e1cca13af35..3830258a5f53 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -352,12 +352,6 @@ 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) { |