Re: [RFC PATCH 14/32] x86/fred: header file with FRED definitions

[Peter Zijlstra]

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.