[PATCH v2 0/4] Support virtio cross-device resources

[David Stevens]

This patchset implements the current proposal for virtio cross-device
resource sharing [1], with minor changes based on recent comments. It
is expected that this will be used to import virtio resources into the
virtio-video driver currently under discussion [2].

This patchset adds a new hook to dma-buf, for querying the dma-buf's
underlying virtio UUID. This hook is then plumbed through DRM PRIME
buffers, and finally implemented in virtgpu.

[1] https://markmail.org/thread/jsaoqy7phrqdcpqu
[2] https://markmail.org/thread/p5d3k566srtdtute

v1 -> v2 changes:
 - Move get_uuid callback into main dma-buf ops (instead of placing it
   in a new flavor of dma-buf).
 - Rename new virtio commands and feature flag, and pull uapi changes
   into their own patch.

David Stevens (4):
  dma-buf: add support for virtio exported objects
  drm/prime: add support for virtio exported objects
  virtio-gpu: add VIRTIO_GPU_F_RESOURCE_UUID feature
  drm/virtio: Support virtgpu exported resources

 drivers/dma-buf/dma-buf.c              | 14 ++++++
 drivers/gpu/drm/drm_prime.c            | 27 +++++++++++
 drivers/gpu/drm/virtio/virtgpu_drv.c   |  3 ++
 drivers/gpu/drm/virtio/virtgpu_drv.h   | 19 ++++++++
 drivers/gpu/drm/virtio/virtgpu_kms.c   |  4 ++
 drivers/gpu/drm/virtio/virtgpu_prime.c | 48 ++++++++++++++++++--
 drivers/gpu/drm/virtio/virtgpu_vq.c    | 62 ++++++++++++++++++++++++++
 include/drm/drm_drv.h                  | 15 +++++++
 include/linux/dma-buf.h                | 22 +++++++++
 include/uapi/linux/virtio_gpu.h        | 19 ++++++++
 10 files changed, 230 insertions(+), 3 deletions(-)

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2.25.0.265.gbab2e86ba0-goog