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

[Arjan van de Ven]

On 1/31/2018 2:15 AM, Thomas Gleixner wrote:

> Good luck with making all that work.

on the Intel side we're checking what we can do that works and doesn't break
things right now; hopefully we just end up with a bit in the arch capabilities
MSR for "you should do RSB stuffing" and then the HV's can emulate that.

(people sometimes think that should be a 5 minute thing, but we need to check
many cpu models/etc to make sure a bit we pick is really free etc which makes
it take longer than some folks have patience for)