On Tue, 2022-10-04 at 07:18 -0700, Dave Hansen wrote: > On 10/3/22 13:05, Edgecombe, Rick P wrote: > > The CET state is xsaves managed. It gets lazily restored before > > returning to userspace with the rest of the fpu stuff. This > > function > > will force restore all the fpu state to the registers early and > > lock > > them from being automatically saved/restored. Then the tasks CET > > state > > can be modified in the MSRs, before unlocking the fpregs. Last time > > I > > tried to modify the state directly in the xsave buffer when it was > > efficient, but it had issues and Thomas suggested this. > > Can you get the gist of this in a comment, please? Sure.
