On Wed, Dec 21, 2022 at 02:58:06AM +0000, Li, Xin3 wrote: > > > +/* Flags above the CS selector (regs->csl) */ > > > +#define FRED_CSL_ENABLE_NMI _BITUL(28) > > > +#define FRED_CSL_ALLOW_SINGLE_STEP _BITUL(25) > > > +#define FRED_CSL_INTERRUPT_SHADOW _BITUL(24) > > > > What's the state of IBT WAIT-FOR-ENDBR vs this? That really should also get a > > high CS bit. > > FRED does provide more possibilities :) That's not an answer. IBT has a clear defect and FRED *should* fix it.
