Re: [Qemu-devel] [PATCH v3 11/34] memory: add memory_region_is_mapped() API

[Paolo Bonzini]

Il 29/05/2014 16:22, Peter Crosthwaite ha scritto:
> > >
> > > +bool memory_region_is_mapped(MemoryRegion *mr)
> > > +{
> Is it not enough to just return mr->parent? Memory mapping assertion
> will happen if you try and map the same twice, even if one of the
> mappings is not contained within an AddressSpace. Checking for just
> the parent mr may be a simpler and more accurate check.

I can see a difference if the memory region is completely overlapped by 
a higher-priority one.  Igor, what was your idea with this function?

Paolo