On 2017.11.15 11:49:00 +0100, Gerd Hoffmann 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 <kraxel@xxxxxxxxxx> > After debugging with Tina on one left race that fixed by https://lists.freedesktop.org/archives/intel-gvt-dev/2017-November/002505.html I still need below qemu fix for proper cursor handling, otherwise qemu just crashed when I click in my terminal program which hides cursor then. diff --git a/hw/vfio/display.c b/hw/vfio/display.c index e500ec2cb1..d9a044b080 100644 --- a/hw/vfio/display.c +++ b/hw/vfio/display.c @@ -169,8 +169,9 @@ static void vfio_display_dmabuf_update(void *opaque) cursor = vfio_display_get_dmabuf(vdev, DRM_PLANE_TYPE_CURSOR); if (vdev->cursor != cursor) { vdev->cursor = cursor; - dpy_gl_cursor_dmabuf(vdev->display_con, - &cursor->buf); + if (cursor) + dpy_gl_cursor_dmabuf(vdev->display_con, + &cursor->buf); free_bufs = true; } if (cursor != NULL) { And with these it seems pretty fine now that I'll queue them up for -next pull. thanks -- Open Source Technology Center, Intel ltd. $gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827
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