On Wed, Sep 13, 2023 at 12:34 PM Akihiko Odaki <akihiko.od...@daynix.com> wrote:
> On 2023/09/13 16:55, Albert Esteve wrote: > > Hi Antonio, > > > > If I'm not mistaken, this patch is related with: > > https://lists.gnu.org/archive/html/qemu-devel/2023-09/msg01853.html > > <https://lists.gnu.org/archive/html/qemu-devel/2023-09/msg01853.html> > > IMHO, ideally, virtio-gpu and vhost-user-gpu both, would use the > > infrastructure from the patch I linked to store the > > virtio objects, so that they can be later shared with other devices. > > I don't think such sharing is possible because the resources are > identified by IDs that are local to the device. That also complicates > migration. > > Regards, > Akihiko Odaki > > Hi Akihiko, As far as I understand, the feature to export dma-bufs from the virtgpu was introduced as part of the virtio cross-device sharing proposal [1]. Thus, it shall be posible. When virtgpu ASSING_UUID, it exports and identifies the dmabuf resource, so that when the dmabuf gets shared inside the guest (e.g., with virtio-video), we can use the assigned UUID to find the dmabuf in the host (using the patch that I linked above), and import it. [1] - https://lwn.net/Articles/828988/
