Re: [kvm-devel] [Xen-devel] More virtio users

[Arnd Bergmann <arnd@xxxxxxxx>]

On Sunday 10 June 2007, Avi Kivity wrote:
> > - PCI (or your favorite HW bus) passthrough, for your favorite oddball
> >   device (e.g., crypto-accelerators).
> >   
> 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 <><

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