Re: [Qemu-devel] [PATCH v4 0/7] vfio: add display support

[Zhenyu Wang <zhenyuw@linux.intel.com>]

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On 2018.02.22 10:30:55 +0100, Gerd Hoffmann wrote:
>   Hi,
> 
> > Nice! Seems to be the last missing gap for local spice with cursor
> > dmabuf support, we'll do more testing on that for sure. Btw, another
> > method might be to add direct cursor dmabuf passing for spice as gl
> > output, is that correct way?
> 
> Passing on the cursor sprite needs the hotspot information, so spice
> client can position the cursor correctly.  I didn't got hotspot
> information in my testing yet, but maybe the guest kernel was too old.
> Is that supported meanwhile?  If so, which kernel version is needed?
>

Current gvt dmabuf doesn't support true hotspot info yet which requires
some pv info update as we can't get it from hw state. Tina is pursuing that.

> Spice already has support for setting pointers, we can simply use
> that, at least initially.  Doesn't use dma-bufs.  If it turns out to be
> a performance issue we can add support for using dma-bufs instead, but
> that needs spice server changes.
> 
> > And really like to see dmabuf support could be in upstream soon. Do
> > you have any predict for which qemu version?
> 
> I want have this in 2.12, at least the current, initial version.
> Improved cursor support might take a little longer.
> 

Good to know. Thanks!

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