[Ksummit-discuss] Short topic: virtio vs IOMMU

[David Woodhouse]

On Mon, 2015-10-26 at 05:43 +0100, Joerg Roedel wrote:
> But it would actually be neat to have at least the option to translate
> virtio DMA through an emulated IOMMU to be able to pass a virtio-device
> to a nested guest.

It would be useful to have an emulated IOMMU, full stop. And yeah, it
might actually make sense to *start* by using it for purely virtual
devices, and then graduate to doing it for passthrough (which will
finally mean we can stop having to pin *all* guest memory the moment we
assign a device, and we only have to pin those pages which are
referenced from the IOMMU page tables).

-- 
dwmw2

-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/x-pkcs7-signature
Size: 5691 bytes
Desc: not available
URL: <http://lists.linuxfoundation.org/pipermail/ksummit-discuss/attachments/20151026/e0b63cf0/attachment-0001.bin>