On Mon, Mar 06, 2023 at 01:16:25PM -0800, Sean Christopherson wrote: > I thought that the consensus was that adding unused-by-the-kernel flags to > cpufeatures.h is ok so long as the feature is hidden from /proc/cpuinfo and the > kernel already dedicates a word to the CPUID leaf? I guess we should finally write it down in Documentation/x86/cpuinfo.rst And in case there's no dedicated word, it should be resorted to KVM-only feature flags. In any case, I'd like for baremetal CPUID stuff to be decoupled from KVM's machinery as far as possible as both have different goals wrt feature flags. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette