This is only the kernel drm driver, there are other parts of gfx stack requiring changes: libdrm, gralloc_drm_pipe, mesa gallium pipe driver, DRI vboxvideo_dri.so library
Personally I'm sure that having libdrm, mesa working on linux is a necessary pre-requisite and it's not a milestone we can count on yet.
Please let me know when that will happen.
virtualbox guest additions are open source but it's not a "just build the libraries" porting to android-x86,
it is a very nasty task for people who do not know the virtualbox guest addition sources and structure.
Mauro
I think that if the problem is to click a button on virtualbox application to disable automatic mouse integration,
like we did in the last 4 years (and it takes 3 seconds) and use the hot keys to switch control, then I do not see it as a fundamental problem.