On Sat, May 4, 2013 at 5:47 PM, Paolo Bonzini <pbonz...@redhat.com> wrote: > Il 03/05/2013 10:04, Jan Kiszka ha scritto: >> We can't change the semantics of opaque as long as old_mmio / old_portio >> are around. But we need a flag anyway to indicate if a region is >> depending on BQL or not. Adding a separate "Object *owner" to >> MemoryRegion can serve both purposes. Then we define something like >> >> void memory_region_set_local_locking(MemoryRegion *mr, >> bool local_locking, >> Object *owner); >> >> to control the property (if local_locking is true, owner must be >> non-NULL, of course). That's quite similar to my old prototype here that >> had memory_region_set/clear_global_locking. > > I think setting the owner can be done separately from enabling local > lock. For example, memory_region_find could also have a variant that > adds a ref to the owner. It would be very similar to what Ping Fan is > doing in the virtio-dataplane's HostMem data structure. > See reply in another thread .
> Paolo
