> On SKL+ retpoline is mostly there, but has a few dinky holes in and it > _might_ make sense to use IBRS. > > But I feel it needs explaining what the exact holes are (pjt and dwmw2 > had a fair enumeration IIRC) such that people can judge the risk.
you are correct to need and want this. the problem is one of patch sequencing a bit; as retpoline is now it has more of these dinky holes, in the next few days patches will flow that will fix a bunch of these. I would like to suggest we do the documentation part after a few days once we know how much of these we can reasonable pre-plug. but yes we must do this tradeoff documentation.
