Hi Gerd,
Thanks for the update.
Actually, I have already got Intel IGD passthru to work couple of days back with git commit being at f02ccf53693758b65843264e077f90cf295e7d98(disas/libvixl: Really suppress gcc 4.6.3 sign-compare warnings).
As far as Qemu is concerned, I am using default machine. I just had to modify the creation of PCI
devices code a little. And also the ISA bridge code. Host uses 3.* kernel(yes, it's quite old!). Guest is
using 4.* kernel. Everything is working without issues. By the way, in my case, Intel IGD is the primary
VGA. So, it has been challenging to accomplish this task since a very long period of time.
And guest I am using is Android-x86(5.1/Lollipop). Updates to follow . . .
Best,
Raghavan