Re: [PATCH v9 12/22] s390: vfio-ap: sysfs interfaces to configure control domains

[Cornelia Huck]

On Wed, 22 Aug 2018 15:16:19 -0400
Tony Krowiak <akrowiak@xxxxxxxxxxxxx> wrote:

> One of the things I suggested in a private conversation with Christian 
> earlier
> today was to provide an additional rw sysfs attribute - a boolean - that 
> indicates
> whether all usage domains should also be control domains. The default 
> could be
> true. This would allow one to configure guests with usage-only domains 
> as well
> as satisfy the convention.

Would this additional attribute then control "add usage domains to the
list of control domains automatically", or "don't allow to add a usage
domain if it has not already been added as a control domain"?

One thing I'm still unsure about is how libvirt comes into the picture
here. Will it consume the setting, or actively manipulate it?

[In general, I'm not very clear about how libvirt will interact with the
whole infrastructure...]