On 07/05/2018 18:50, Markus Armbruster wrote: > Paolo Bonzini <pbonzini(a)redhat.com&gt; writes: > >> On 07/05/2018 13:56, Markus Armbruster wrote: >>> Adding more and more ways to do the same stuff does not improve an >>> interface. Interface design needs to be *opinionated*. If we decide >>> -machine accel=tcg isn't a nice interface, by all means create a better >>> one, but as replacement[*], not as addition. >>> >>> Furthermore: >>> >>> tcg: add options for enabling MTTCG >>> >>> We know there will be cases where MTTCG won't work until additional work >>> is done in the front/back ends to support. It will however be useful to >>> be able to turn it on. >>> >>> As a result MTTCG will default to off unless the combination is >>> supported. However the user can turn it on for the sake of testing. >>> >>> Signed-off-by: KONRAD Frederic <fred.konrad(a)greensocs.com&gt; >>> [AJB: move to -accel tcg,thread=multi|single, defaults] >>> Signed-off-by: Alex Bennée <alex.bennee(a)linaro.org&gt; >>> Reviewed-by: Richard Henderson <rth(a)twiddle.net&gt; >>> >>> I'm sorry, but this us sub-par. Yes, the commit is also about "enabling >>> MTTCG", but it also adds a new way to select accelerators, without ever >>> spelling that out. It should've been split, and properly described. >> >> Perhaps we can deprecate "-M accel" then, and also while we're at it >> move kernel_irqchip from -machine to "-accel kvm" where it belongs? > > Sounds good to me. Thomas, here's one for you! :)