On Mon, 27 Aug 2018 09:47:58 -0400 Tony Krowiak <akrowiak@xxxxxxxxxxxxx> wrote: > On 08/27/2018 04:33 AM, Cornelia Huck wrote: > > On Thu, 23 Aug 2018 10:16:59 -0400 > > Tony Krowiak <akrowiak@xxxxxxxxxxxxx> wrote: > > > >> On 08/23/2018 06:25 AM, Cornelia Huck wrote: > >>> 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"? > >> It was just a proposal that wasn't really discussed at all, but this > >> attribute would add usage domains to the list of control domains > >> automatically if set to one. That would be the default behavior which > >> would be turned off by manually setting it to zero. > > If we want to do something like that, having it add the usage domains > > automatically sounds like the more workable alternative. What I like > > about this is that we make it explicit that we change the masks beyond > > what the admin explicitly configured, and provide a knob to turn off > > that behaviour. > > So, are you saying I should go ahead and implement this? I'm just saying that it does not sound like a bad idea :) If you agree that it's a good idea and if others also like it... I'd certainly not mind you going ahead :)