Re: [PATCH v18 0/6] drm/i915/gvt: Dma-buf support for GVT-g

[Gerd Hoffmann]

On Wed, Nov 15, 2017 at 05:11:49PM +0800, Tina Zhang wrote:
> v17->v18:
> 1) unmap vgpu's opregion when destroying vgpu.
> 2) update comments for VFIO_DEVICE_GET_GFX_DMABUF. (Alex)

> This patch set adds the dma-buf support for intel GVT-g.
> 
> dma-buf is an uniform mechanism to share DMA buffers across different
> devices and subsystems. dma-buf for intel GVT-g is mainly used to share
> the vgpu's framebuffer to userspace to leverage userspace graphics stacks
> to render the framebuffer to the display monitor.
> 
> The main idea is that we create a gem object and set vgpu's framebuffer as
> its backing storage. Then, export a dma-buf associated with this gem object.
> With the fd of this dma-buf, userspace can directly handle this buffer.
> 
> This patch set can be tried with the following example:
> 	git://git.kraxel.org/qemu  branch: work/intel-vgpu
> 
> A topic branch with the latest patch set is:
>         https://github.com/intel/gvt-linux.git   branch: topic/dmabuf

Tested-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>