On Sat, Jul 25, 2026, David Woodhouse wrote: > On Fri, 2026-07-24 at 14:17 -0700, Sean Christopherson wrote: > > On Fri, Jul 03, 2026, David Woodhouse wrote: > > > +4.145 KVM_GET_CLOCK_GUEST > > > +---------------------------- > > > + > > > +:Capability: none > > > > Why not add a CAP? The check in the subsequent selftest is quite gross. > > Because nobody would ever use it in practice anyway.
Yes, the selftest will. > Even if the ioctl is present, you *still* have to try it and fall back to the > old method because there are ways that a *guest* can force master clock mode > off. That's totally fine, but userspace, especially for selftests, needs a way to know the ioctl exists and _should_ work.
