On 11/21/2022 11:29 PM, Dave Hansen wrote: > On 11/21/22 06:46, Jiaxi Chen wrote: >> Features which has been enabled in kernel usually should be added to >> /proc/cpuinfo. > > Features that the kernel *itself* is actually using always get in there. > Things like "smep". > > But, things that the kernel "enables" but that only get used by > userspace don't generally show up in /proc/cpuinfo. > > KVM is kinda a weird case. The kernel is making the feature available > to guests, but it's not _using_ it in any meaningful way. To me, this > seems much more akin to the features that are just available to > userspace than something that the kernel is truly using. > > Also, these feature names are just long and ugly, and the "flags" line > is already a human-*un*readable mess. I think we should just leave them > out. True and agree. As for these cpuids are not truly used by kernel except for advertising to kvm userspace, we can hide them in /proc/cpuinfo by overriding their name with "". -- Regards, Jiaxi
