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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Wed, 11 Jul 2012 10:26:49 +1000
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Subject: Re: [Qemu-devel] [PATCH 2/2] vfio-powerpc: added VFIO support
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To: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: Alexander Graf <agraf@suse.de>, qemu-devel@nongnu.org, Alex Williamson <alex.williamson@redhat.com>, qemu-ppc@nongnu.org, Scott Wood <scottwood@freescale.com>, David Gibson <david@gibson.dropbear.id.au>

On Wed, 2012-07-11 at 10:17 +1000, Alexey Kardashevskiy wrote:
> So the current one would be SPAPR_TCE_32?

No, the iommu type is SPAPR_TCE, but the *window* info you get here is
the 32-bit window. My thinking is add some versionning and a bunch of
reserved fields to that info struct so we can stick a few more things,
or at the very least add a flags field, so we can return if/when we
support DDW etc... on that iommu.

Cheers,
Ben.