Hi,
We need to figure a way to handle intel vgpu with spice, especially how
to handle the cursor.
What we'll get from the vgpu is two dma-bufs: One for the primary
plane (aka guest display), one for the cursor plane. We also get the
position of the cursor. We do *not* get the hotspot of the cursor.
The latter implies client mouse mode isn't going to work, so we need
some other way to render the cursor. I see basically two options:
(a) Update spice-server API (and probably spice protocol too),
add a call (or two) to pass on cursor dmabuf and position.
(b) Create a new dma-buf in qemu, render guest display with cursor
to it, pass *that* to spice-server.
I think (a) would be the better choice. It gives more flexibility to
the spice client, for example it would be possible to create a drm-
based spice client which simply maps the guest planes to a host
scanout. I think it'll also have less overhead as qemu has no need to
touch the dma-bufs then, it just passes on the fds.
But option (b) wouldn't be a big deal either. qemu must handle that
anyway, for the gtk and sdl UIs, so supporting it for spice too would
be easy.
Comments?
cheers,
Gerd
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