Re: [Qemu-devel] [PATCH 09/17] memory: iommu support

[Paolo Bonzini]

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Il 02/05/2013 05:05, David Gibson ha scritto:
>>> I think the problem is that we do not have reference counting,
>>> and this makes it simpler to manage the lifetime.  It can be
>>> changed later.
> I don't really follow this logic.  In the existing case, the iommu 
> target is always system memory, and there's already 
> address_space_memory which always exists.

But does the tce->iommu address space always exist?  Can you have
multiple domains and so on?

I can surely change it if you prefer, after all you're the only user
right now (address_space_memory always exists).  But I'm not 100% sure
it will create more problems than it solves.

Paolo
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