Re: [RFC,05/10] x86/speculation: Add basic IBRS support infrastructure

[Andi Kleen]

> 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

http://lkml.iu.edu/hypermail/linux/kernel/1801.1/05556.html

and that's the newer one with only interrupt stuffing

https://marc.info/?l=linux-kernel&m=151674718914504

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

-Andi