In libxl__need_xenpv_qemu check that the backend domain of the Qdisk
device is Dom0 before launching a Qemu instance in the toolstack
domain.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>