On Thu, Aug 17 2023, Marc Zyngier <maz@xxxxxxxxxx> wrote: > On Thu, 17 Aug 2023 09:16:56 +0100, > Cornelia Huck <cohuck@xxxxxxxxxx> wrote: >> >> On Mon, Aug 14 2023, Jing Zhang <jingzhangos@xxxxxxxxxx> wrote: >> >> > Maybe it'd be better to leave this to whenever we do need to add other >> > range support? >> >> My point is: How does userspace figure out if the kernel that is running >> supports ranges other than id regs? If this is just an insurance against >> changes that might arrive or not, we can live with the awkward "just try >> it out" approach; if we think it's likely that we'll need to extend it, >> we need to add the mechanism for userspace to find out about it now, or >> it would need to probe for presence of the mechanism... > > Agreed. Nothing like the present to address this sort of things. it > really doesn't cost much, and I'd rather have it right now. > > Here's a vague attempt at an advertising mechanism. If people are OK > with it, I can stash that on top of Jing's series. I think that looks reasonable.
