From mboxrd@z Thu Jan  1 00:00:00 1970
From: Arnd Bergmann <arnd@arndb.de>
Subject: Re: [kvm-devel] [Xen-devel] More virtio users
Date: Wed, 13 Jun 2007 00:07:35 +0200
Message-ID: <200706130007.36437.arnd@arndb.de>
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On Sunday 10 June 2007, Avi Kivity wrote:
> > - PCI (or your favorite HW bus) passthrough, for your favorite oddbal=
l
> > =A0 device (e.g., crypto-accelerators).
> > =A0=20
> Won't all high-bandwidth traffic be through dma, bypassing virtio?

It can be done, but you'd also need a passthrough for the IOMMU
in that case, and you get a potential security hole: if a malicious
guest is smart enough to figure out IOMMU mappings from the device
to memory owned by the host.

	Arnd <><