On Wed, 26 Nov 2025 06:17:25 +1000
Dave Airlie <airlied@gmail.com> wrote:

> On Tue, 25 Nov 2025 at 19:15, Christian König <christian.koenig@amd.com>
> wrote:
> >
> > On 11/25/25 10:08, Dave Airlie wrote:

snip

> So far I haven't heard anything about needing dma-buf interactions at
> that level, and maybe Zhi has more insight into the future there.
> 

For VFIO parts, the vendor VFIO driver relies on the core driver's support
to export the VM's framebuffer to the userspace either as type a)
VFIO_GFX_PLANE_TYPE_REGION, framebuffer as a region or b)
VFIO_GFX_PLANE_TYPE_DMABUF, framebuffer as a dmabuf, which is usually
backed by a GEM object.

NVIDIA vGPU uses VFIO_GFX_PLANE_TYPE_REGION, so dma-buf interactions
are not required.

> Dave.