dev: Add a dummy VirtIO device
authorAndreas Sandberg <andreas.sandberg@arm.com>
Mon, 7 Nov 2016 18:16:51 +0000 (18:16 +0000)
committerAndreas Sandberg <andreas.sandberg@arm.com>
Mon, 3 Apr 2017 16:36:15 +0000 (16:36 +0000)
commitba00d7449df87c99bf8aca97a877b493c14f4866
treeaf6e8b32972ddfe6a874b0b9e9ffaf90aded973d
parentcd9ca71b25e0b119c04eb87d4d1d74cfc90587e9
dev: Add a dummy VirtIO device

VirtIO transport interfaces always expect a VirtIO device
pointer. However, there are cases (in particular when using VirtIO's
MMIO interface) where we want to instantiate an interface without a
device. Add a dummy device using VirtIO device ID 0 and no queues to
handle this use case.

Change-Id: I6cbe12fd403903ef585be40279c3b1321fde48ff
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Sudhanshu Jha <sudhanshu.jha@arm.com>
Reviewed-by: Rekai Gonzalez Alberquilla <rekai.gonzalezalberquilla@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/2325
Reviewed-by: Weiping Liao <weipingliao@google.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
src/dev/virtio/VirtIO.py
src/dev/virtio/base.cc
src/dev/virtio/base.hh