x86_feature_cpuid
const struct cpuid_reg cpuid = x86_feature_cpuid(leaf * 32); \
const struct cpuid_reg cpuid = x86_feature_cpuid(x86_feature);
const struct cpuid_reg cpuid = x86_feature_cpuid(x86_feature);
BUILD_BUG_ON(x86_feature_cpuid(X86_FEATURE_PERFMON_V2).function != 0x80000022 ||
x86_feature_cpuid(X86_FEATURE_PERFMON_V2).index);