[PATCH v5 0/2] s390: virtio: let arch validate VIRTIO features

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Hi all,

The goal of the series is to give a chance to the architecture
to validate VIRTIO device features.

in this respin:

1) I kept removed the ack from Jason as I reworked the patch
   @Jason, the nature and goal of the patch did not really changed
           please can I get back your acked-by with these changes?

2) I suppressed the unnecessary verbosity of the architecture
   specific patch

3) put back the arch specific code inside arch/s390/mm/init.c
   after offline discussion with Christian.

Regards,
Pierre

Pierre Morel (2):
  virtio: let arch validate VIRTIO features
  s390: virtio: PV needs VIRTIO I/O device protection

 arch/s390/mm/init.c           | 27 +++++++++++++++++++++++++++
 drivers/virtio/virtio.c       | 19 +++++++++++++++++++
 include/linux/virtio_config.h |  1 +
 3 files changed, 47 insertions(+)

-- 
2.25.1

Changelog

to v5:

- return directly from S390 arch_validate_virtio_features()
  when the guest is not protected.
  (Connie)

- Somme rewording
  (Connie, Michael)

- moved back code from arch/s390/ ...kernel/uv.c to ...mm/init.c
  (Christian)

to v4:

- separate virtio and arch code
  (Pierre)

- moved code from arch/s390/mm/init.c to arch/s390/kernel/uv.c
  (as interpreted from Heiko's comment)

- moved validation inside the arch code
  (Connie)

- moved the call to arch validation before VIRTIO_F_1 test
  (Michael)

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)






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