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Date: Wed, 22 Apr 2015 15:34:09 +1000
From: David Gibson <david@gibson.dropbear.id.au>
Message-ID: <20150422053408.GK31815@voom.redhat.com>
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Subject: Re: [Qemu-devel] [PATCH qemu v6 05/15] spapr_pci_vfio: Enable
 multiple groups per container
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To: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: Alexander Graf <agraf@suse.de>, Michael Roth <mdroth@linux.vnet.ibm.com>, qemu-devel@nongnu.org, Alex Williamson <alex.williamson@redhat.com>, qemu-ppc@nongnu.org, Gavin Shan <gwshan@linux.vnet.ibm.com>


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On Sat, Apr 11, 2015 at 01:24:34AM +1000, Alexey Kardashevskiy wrote:
> This enables multiple IOMMU groups in one VFIO container which means
> that multiple devices from different groups can share the same IOMMU
> table (or tables if DDW).
>=20
> This removes a group id from vfio_container_ioctl(). The kernel support
> is required for this; if the host kernel does not have the support,
> it will allow only one group per container. The PHB's "iommuid" property
> is ignored. The ioctl is called for every container attached to
> the address space. At the moment there is just one container anyway.
>=20
> If there is no container attached to the address space,
> vfio_container_do_ioctl() returns -1.
>=20
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

--=20
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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