> On 3 Jan 2018, at 16:05, Dmitry Fleytman <dmitry.fleyt...@gmail.com> wrote: > > > >> On 3 Jan 2018, at 16:00, Alex Williamson <alex.william...@redhat.com >> <mailto:alex.william...@redhat.com>> wrote: >> >> On Wed, 3 Jan 2018 10:09:49 +0200 >> Dmitry Fleytman <dmitry.fleyt...@gmail.com >> <mailto:dmitry.fleyt...@gmail.com>> 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, >> >> You're on the right track with providing a ROM from another system, but >> IGD ROMs don't typically "just work", try rom-fixer on it to fix the >> device ID and checksum and make sure rom-parser reports a legacy ROM >> section: >> >> https://github.com/awilliam/rom-parser >> <https://github.com/awilliam/rom-parser> >> >> I've made IGD assignment work on a UEFI Lenovo laptop by temporarily >> booting a legacy OS, dumping the IGD ROM, booting back to UEFI, fixing >> the ROM, then passing it to QEMU via the file option. Thanks, > > Thanks, Alex! We will try.
Hi Alex, Thanks for your suggestion. We were able to boot Linux with IGD assignment successfully. One more question - what about UEFI only OSes, like MacOS? As far as I understand, such a configuration is not supported. Am I right? What are the missing parts required to support UEFI VM with IGD passthrough? Thanks, Dmitry > >> >> Alex
_______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
