Messages in this thread | | | From | "Van De Ven, Arjan" <> | Subject | RE: [PATCH 0/7] IBRS patch series | Date | Fri, 5 Jan 2018 16:44:17 +0000 |
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> On Fri, Jan 05, 2018 at 04:37:30PM +0000, David Woodhouse wrote: > > You are completely ignoring pre-Skylake here. > > > > On pre-Skylake, retpoline is perfectly sufficient and it's a *lot* > > faster than the IBRS option which is almost prohibitively slow. > > > > We didn't do it just for fun. And it's working fine; it isn't *that* > > complex. > > How do you enable IBRS when the CPU switches to SMM?
you do not need to. SMM takes care of itself.
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