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>

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 */

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) {