Theo Buehler <[email protected]> wrote: > On Mon, Jun 19, 2023 at 08:50:44AM -0600, Theo de Raadt wrote: > > If you disable XSAVE_XSAVES, then userland IBT enforcement is also disabled. > > > > XSAVES is required to manage the IBT enforcement mechanism's internal state > > over a context switch. > > > > All machines with IBT have XSAVES. > > The thing is that this breaks it on machines without IBT>
Ah. Well that does help a little -- it means the XSAVES state saving code is losing some other context in some situation.
