Il 20/08/2013 11:13, Benjamin Herrenschmidt ha scritto: > On Tue, 2013-08-20 at 11:09 +0200, Paolo Bonzini wrote: >>> Sorry if I miss anything, but is not it what the patch already >> does? :) >> >> No, you need to expose multitce unconditionally in the device tree. > > If I'm not mistaken the multitce kernel side patches are still not > upstream so I disagree. Exposing it will make Linux use it which means > that anything running on 3.10 or 3.11 will become very slow. > > So no, multitce should not be exposed if KVM doesn't support it.
Then you have to do it right and: - provide the infrastructure to enable/disable it from the command line (which will be enough design effort alone); - add pseries-1.6 as a synonym of pseries in 1.6.1; - add pseries-1.7 a synonym of pseries in master; - add a pseries-1.6 machine type in master that always disables it. Paolo
