On Wed, 15 Nov 2017 11:49:00 +0100 Gerd Hoffmann <kra...@redhat.com> wrote:
> 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 <kra...@redhat.com> Hi Gerd, Can you share the xml snippets required for the VM to make this work? Last I tried I couldn't get the display/video/hostdev configuration to get any enhanced behavior through the dmabuf. Thanks, Alex
