> > you asked before and even before you sent the email I confirmed to > > you that the document is correct > > > > I'm not sure what the point is to then question that again 15 minutes > > later other than creating more noise. > > Apologies, I hadn't seen the comment on IRC. > > Sometimes the docs *don't* get it right, especially when they're > released in a hurry as that one was. I note there's a *fourth* version > of microcode-update-guidance.pdf available now, for example :) > > So it is useful that you have explicitly stated that for *this* > specific concern, the document is in fact correct that SMEP saves us > from BTB and RSB pollution, *despite* the empirical evidence that those > structures only hold the low 31 bits. your question was specific to RSB not BTB. But please show the empirical evidence for RSB ?
