RE: Improve retpoline for Skylake
From: Van De Ven, Arjan
Date: Mon Jan 15 2018 - 12:57:07 EST
> Having firmware refill the RSB only makes a difference if you are on
> Skylake+ were RSB underflows are bad, and you're not using IBRS to
> protect your indirect predictions.
... and before that you don't need it.