On Tue, Jun 09, 2020 at 10:25:15AM +0900, David Stevens wrote:

This patchset implements the current proposal for virtio cross-device
resource sharing [1]. It will be used to import virtio resources into
the virtio-video driver currently under discussion [2]. The patch
under consideration to add support in the virtio-video driver is [3].
It uses the APIs from v3 of this series, but the changes to update it
are relatively minor.

This patchset adds a new flavor of dma-bufs that supports querying the
underlying virtio object UUID, as well as adding support for exporting
resources from virtgpu.

Gerd, David, if possible, please test this in configuration with
virtual VTD enabled but with iommu_platform=off
to make sure we didn't break this config.


Besides that, for virtio parts:

Acked-by: Michael S. Tsirkin <mst@redhat.com>

[1] https://markmail.org/thread/2ypjt5cfeu3m6lxu
[2] https://markmail.org/thread/p5d3k566srtdtute
[3] https://markmail.org/thread/j4xlqaaim266qpks

v4 -> v5 changes:
 - Remove virtio_dma_buf_export_info.

David Stevens (3):
  virtio: add dma-buf support for exported objects
  virtio-gpu: add VIRTIO_GPU_F_RESOURCE_UUID feature
  drm/virtio: Support virtgpu exported resources

 drivers/gpu/drm/virtio/virtgpu_drv.c   |  3 +
 drivers/gpu/drm/virtio/virtgpu_drv.h   | 20 ++++++
 drivers/gpu/drm/virtio/virtgpu_kms.c   |  4 ++
 drivers/gpu/drm/virtio/virtgpu_prime.c | 96 +++++++++++++++++++++++++-
 drivers/gpu/drm/virtio/virtgpu_vq.c    | 55 +++++++++++++++
 drivers/virtio/Makefile                |  2 +-
 drivers/virtio/virtio.c                |  6 ++
 drivers/virtio/virtio_dma_buf.c        | 82 ++++++++++++++++++++++
 include/linux/virtio.h                 |  1 +
 include/linux/virtio_dma_buf.h         | 37 ++++++++++
 include/uapi/linux/virtio_gpu.h        | 19 +++++
 11 files changed, 321 insertions(+), 4 deletions(-)
 create mode 100644 drivers/virtio/virtio_dma_buf.c
 create mode 100644 include/linux/virtio_dma_buf.h

-- 
2.27.0.278.ge193c7cf3a9-goog