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SubjectRe: [PATCH 0/7] IBRS patch series
* Linus Torvalds:

> On Thu, Jan 4, 2018 at 9:56 AM, Tim Chen <> wrote:
>> Speculation on Skylake and later requires these patches ("dynamic IBRS")
>> be used instead of retpoline[1].
> Can somebody explain this part?
> I was assuming that retpoline would work around this issue on all uarchs.
> This seems to say "retpoline does nothing on Skylake+"

Retpoline also looks incompatible with CET, so future Intel CPUs will
eventually need a different approach anyway.

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