Re: [PATCH v4 03/15] KVM: s390: refactor crypto initialization

[Cornelia Huck]

On Sun, 22 Apr 2018 10:52:55 -0400
Tony Krowiak <akrowiak@xxxxxxxxxxxxxxxxxx> wrote:

> >>>>> (Not providing a crycb if APXA is not available would be loss of
> >>>>> functionality, I guess? Deciding not to provide vfio-ap if APXA is not
> >>>>> available is a different game, of course.)  
> >>>> This would require a change to enabling the CPU model feature for
> >>>> AP.  
> >>> But would it actually make sense to tie vfio-ap to APXA? This needs to
> >>> be answered by folks with access to the architecture :)  
> >> I don't see any reason to do that from an architectural perspective.
> >> One can access AP devices whether APXA is installed or not, it just limits
> >> the range of devices that can be addressed  
> > So I guess we should not introduce a tie-in then (unless it radically
> > simplifies the code...)  
> 
> I'm not clear about what you mean by introducing a tie-in. Can you 
> clarify that?

Making vfio-ap depend on APXA.