Re: Outline for VHOST_USER_PROTOCOL_F_VDPA

[Michael S. Tsirkin]

On Wed, Sep 30, 2020 at 03:57:52PM +0100, Stefan Hajnoczi wrote:
> > Architecturally, I think we can have 3 processes:
> > 
> > 
> > VMM -- guest device emulation -- host backend
> > 
> > 
> > to me this looks like increasing our defence in depth strength,
> > as opposed to just shifting things around ...
> 
> Cool idea.
> 
> Performance will be hard because there is separation between the guest
> device emulation and the host backend.

Absolutely. As a tradeoff we could put some data path things in the backend,
e.g. for virtio it is practical to have control path in emulation layer,
data path in the backend.

-- 
MST