virtio-scsi driver

This is the first implementation of the virtio-scsi driver, a virtual
HBA that will be supported by KVM.  It implements a subset of the spec,
in particular it does not implement asynchronous notifications for either
LUN reset/removal/addition or CD-ROM media events, but it is already
functional and usable.

I waited a week for James to follow up on the thread and to get other
remarks.  I got none, so here is the patch amended after Mike Christie's
review.

Other matching bits:

- spec at http://people.redhat.com/pbonzini/virtio-spec.pdf

- QEMU implementation at git://github.com/bonzini/qemu.git,
  branch virtio-scsi

Please review.

Paolo Bonzini (2):
  virtio-scsi: first version
  virtio-scsi: add error handling

 drivers/scsi/Kconfig        |    8 +
 drivers/scsi/Makefile       |    1 +
 drivers/scsi/virtio_scsi.c  |  551 ++++++++++++++++++++++++++++++++++++++++++++
 include/linux/virtio_scsi.h |  112 +++++++++++
 include/linux/virtio_ids.h  |    1 +
 4 files changed, 673 insertions(+), 0 deletions(-)
 create mode 100644 drivers/scsi/virtio_scsi.c

-- 
1.7.7.1

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