[PATCH v3 0/1] s390: virtio: let arch choose to accept devices without IOMMU feature

[Pierre Morel <pmorel@xxxxxxxxxxxxx>]

An architecture protecting the guest memory against unauthorized host
access may want to enforce VIRTIO I/O device protection through the
use of VIRTIO_F_IOMMU_PLATFORM.

Let's give a chance to the architecture to accept or not devices
without VIRTIO_F_IOMMU_PLATFORM.

Pierre Morel (1):
  s390: virtio: let arch accept devices without IOMMU feature

 arch/s390/mm/init.c     |  6 ++++++
 drivers/virtio/virtio.c | 22 ++++++++++++++++++++++
 include/linux/virtio.h  |  2 ++
 3 files changed, 30 insertions(+)

-- 
2.25.1

Changelog

to v3:

- add warning
  (Connie, Christian)

- add comment
  (Connie)

- change hook name
  (Halil, Connie)

to v2:

- put the test in virtio_finalize_features()
  (Connie)

- put the test inside VIRTIO core
  (Jason)

- pass a virtio device as parameter
  (Halil)