On Wed, Sep 14, 2016 at 08:37:34PM +1000, David Gibson wrote: [...]
> > This should not be related to the interface at all? > > > > I was based on the assumption that "Power cannot support either one of > > MAP/UNMAP, but only if both exist". > > Huh? I have no idea what you mean by that. > > Power can support notifying both map and unmap events just fine - but > in order to provide *any* notifications, it has to disable KVM > acceleration of the guest-side IOMMU (otherwise qemu won't know about > any changes to the IOMMU state). > > So the change you you suggested before to != IOMMU_NOTIFIER_NONE is > exactly correct, anything else is not. Sorry I was wrong. Yes user can register with only one (MAP or UNMAP) notifier type for any platform. Thanks. -- peterx
