Messages in this thread | | | From | "Van De Ven, Arjan" <> | Subject | RE: [PATCH v3 3/5] x86/enter: Use IBRS on syscall and interrupts | Date | Wed, 10 Jan 2018 18:47:08 +0000 |
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> 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.
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