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SubjectRe: [RFC,05/10] x86/speculation: Add basic IBRS support infrastructure
> The question is about all the additional RSB-frobbing and call depth
> counting and other bits that don't really even exist for Skylake yet in
> a coherent form.

We have had several patch kits posted that all are in a "coherent form"

That was the original one

and that's the newer one with only interrupt stuffing

We don't have generic deep chain handling yet, but everything else
is there.


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