On Mon, Nov 21, 2022 at 10:46:21PM +0800, Jiaxi Chen wrote: > Features which has been enabled in kernel usually should be added to > /proc/cpuinfo. No, pls read this first: Documentation/x86/cpuinfo.rst If something's not clear, we will extend it so that it is. /proc/cpuinfo - a user ABI - is not a dumping ground for CPUID bits. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette