Fuzhong/ Geoffrey,
              I am trying to passthrough the GPU to a guest vm in Intel apollo lake family hardware with atom processor. I built acrn hypervisor with yocto. The GPU (VGA controller) is successfully passthrough to the guest vm. lspci command shows the passthrough VGA controller in the guest VM. But still the guest vm could not display anything on the screen. I see some errors in i915 driver. Is it required to patch the ovmf bootloader with VBT and GOP for this particular hardware to make the display work as mentioned in the below link? Am i missing anything?
https://projectacrn.github.io/latest/tutorials/gpu-passthru.html

ACRN: 2.7
Poky and meta-acrn branch: kirkstone

Hi Fuzhong,
    Thanks for the reply. For the latest platforms, still do we need to patch GOP and VBT for using GPU passthrough?

Fuzhong,
            I see that the v2.7 device model still have the gvt-g option. But, you have mentioned that it is supported until v2.0. Should it work if i use v2.7? Could you please confirm.

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Hi Fuzhong,
           The board_inspector.py is not available in the v2.0. Is there any other tool available in v2.0 to generate the board config file for a custom board.
It have board_cfg_gen.py which asks for board and scenario as input. Does it function like board_inspector.
Thanks.

Hi Fuzhong,
     Now, the virtual gpu model is working in my apollo lake hardware. But, there is some lag in displaying the QT applications. Is there any parameter to tweak for improving the GPU performance? 

Hello,
     Any suggestions on the improvement would be highly appreciable.