[PATCH 0/6] drm: Add mouse cursor hotspot support to atomic KMS

[Gerd Hoffmann]

  Hi,

> >   4. make sure the hotspot property is only set on VIRTUAL_CURSOR planes
> >   and nothing else in the rebased patch series
> 
> Simon also mentioned on irc that these special planes must not expose the
> CRTC_X/Y property, since that doesn't really do much at all. Or is our
> understanding of how this all works for commandeered cursors wrong?

Depends.  In some cases the pointer position is a one-way host->guest
ticket (via tablet device).  In some cases the other direction works too
and the guest can warp the mouse pointer to another place on the host
display.  The guest can't easily figure whenever warp works or not
because that depends on host-side configuration the guest has no insight
to.

take care,
  Gerd