[Xen-devel] Is: Wrap-up Was: VIRTIO - compatibility with different virtualization solutions

[Daniel Kiper <daniel.kiper@xxxxxxxxxx>]

Hi,

After some email exchange it looks that there is no consensus how VRITIO
should work on Xen. There is some hand waiving and some preliminary tests
but it is not sufficient to take final decision and put all needed stuff
into upcoming VIRTIO specification release. However, it is certain that
any solution which will be chosen in upcoming future MUST not break Xen
security model, has a good performance and easily integrate with currently
existing solutions. Additionally, it looks that that some terms (e.g.
physical address) in VIRTIO specification shall be changed to something
which is more platform independent (e.g. handle). Although such changes
should not lead to changes in currently existing VIRTIO implementations.

Taking into account above mentioned things I state that more research
and development work is needed. I volunteer to lead this task. Hence
I would like to propose that VIRTIO-46 task (Verify that VIRTIO devices
could be implemented in Xen environment) should be opened and work on
it should be deferred (from formal POV but that does not mean that work
should be on hold in real) until next VIRTIO release. Additionally,
I would like to rise VIRTIO on Xen issue during Xen Hackathon 2014 and
in other avenues to discuss this with other stake holders of VIRTIO.

Daniel

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