[PATCH v3 0/4] Support virtio cross-device resources

[David Stevens <stevensd@chromium.org>]

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

v2 -> v3 changes:
 - Remove ifdefs.
 - Simplify virtgpu_gem_prime_export as it can only be called once.
 - Use virtio_gpu_vbuffer's objs field instead of abusing data_buf.

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              | 12 ++++++
 drivers/gpu/drm/drm_prime.c            | 23 +++++++++++
 drivers/gpu/drm/virtio/virtgpu_drv.c   |  3 ++
 drivers/gpu/drm/virtio/virtgpu_drv.h   | 18 +++++++++
 drivers/gpu/drm/virtio/virtgpu_kms.c   |  4 ++
 drivers/gpu/drm/virtio/virtgpu_prime.c | 41 +++++++++++++++++--
 drivers/gpu/drm/virtio/virtgpu_vq.c    | 55 ++++++++++++++++++++++++++
 include/drm/drm_drv.h                  | 10 +++++
 include/linux/dma-buf.h                | 18 +++++++++
 include/uapi/linux/virtio_gpu.h        | 19 +++++++++
 10 files changed, 200 insertions(+), 3 deletions(-)

-- 
2.25.1.481.gfbce0eb801-goog