From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <Ian.Campbell@citrix.com>
Subject: Re: QEMU 2.2.0 in Xen 4.6
Date: Fri, 23 Jan 2015 14:55:10 +0000
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To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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On Fri, 2015-01-23 at 14:42 +0000, Stefano Stabellini wrote:

> HVM guest ---------(PV)----------> QEMU in Dom0 for guest
>     |
>     --(emulation)--> QEMU Stubdom-(syscall)->Linux Stubdom---(PV)--> QEMU Dom0 for stubdom

Here, and throughout what you said I think, "QEMU in Dom0 for guest"
could equally well be e.g. "blkback in driver domain for guest" likewise
the "... for stubdom" too.

i.e. the PV backend for the stubdom or the guest doesn't necessarily
need to be QEMU and doesn't necessarily need to be in dom0.

Ian.