I'm also interested in the answer.I've read about how to use BIOS GPU in UEFI
system, but not versa.
For your first question, since most Mac have 2 GPU, I'll probably give the
"unused" (slow) IGD to (slow) vm, while display the vm output onto the main
screen (GPU). Thus UPD mode should be fine.
Regards,Daimon
On Wednesday, January 3, 2018 4:10 PM, Dmitry Fleytman
<[email protected]> wrote:
Hello All,
We're evaluating possibility of using IGD passthrough in legacy mode using
Apple laptops, like Macbook Air as a h/w platform.
Apple laptops are using UEFI boot, according to lspci the options rom is
disabled:
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
As a result when trying to launch QEMU IGD passthrough, the following error is
encountered:
qemu-system-x86_64: -device
vfio-pci,host=00:02.0,id=hostdev0,bus=pci.0,addr=0x2: IGD device 0000:00:02.0
has no ROM, legacy mode disabled
We tried to supply VBIOS binaries dumped from another platform with the same
graphics adaptor, but that did not work either: “legacy mode disabled” error
disappeared but the picture did not show up on the screen.
Therefore, we would like to ask a number of questions:
- What in your opinion would be the best way to make IGD passthrough working
on hardware like this?
- For UEFI only OSes, like MacOS, what are the missing parts required to
support UEFI VM with IGD passthrough?
Your thoughts are welcome,
Dmitry
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