On 12/12/2017 11:21 AM, Thomas Gleixner wrote: > The only critical interaction is the return to user path (user CS/SS) and > we made sure with the LAR touching that these are precached in the CPU > before we go into fragile exit code.
How do we make sure that it _stays_ cached? Surely there is weird stuff like WBINVD or SMI's that can come at very inconvenient times and wipe it out of the cache.
