On 3/4/19 10:55 AM, Yu, Fenghua wrote: >> What does this feature end up looking like in /proc/cpuinfo? > The flag string is "core_capability" in /proc/cpuinfo. Ahh, OK, I misread the lack of quotes in the comment: > +#define X86_FEATURE_CORE_CAPABILITY (18*32+30) /* IA32_CORE_CAPABILITY MSR */