[Bug 286467] bhyve: Failed to emulate instruction sequence 418b0289024883c408c333c0488974

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=286467

mario felicioni <marietto2008@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |marietto2008@gmail.com

--- Comment #1 from mario felicioni <marietto2008@gmail.com> ---
Your error seems to be almost the same that I had in the past for which I have
asked to Corvin what to do. This was the error :

I wanted to passthru my CoffeeLake-S GT2 [UHD Graphics 630] :

ppt4@pci0:0:2:0:        class=0x038000 rev=0x02 hdr=0x00 vendor=0x8086
device=0x3e98 subvendor=0x145
8 subdevice=0xd000
   vendor     = 'Intel Corporation'
   device     = 'CoffeeLake-S GT2 [UHD Graphics 630]'
   class      = display

bhyve -S -c sockets=1,cores=2,threads=2 -m 4G -w -H -A \
-s 0,hostbridge \
-s 1,nvme,/dev/$vmdisk0,bootindex=1 \
-s 2,ahci-hd,/dev/$vmdisk2 \
-s 3,ahci-hd,/dev/$vmdisk4 \
-s 4,passthru,0/2/0 \
-s 7,virtio-net,tap4 \
-s 10,hda,play=/dev/dsp,rec=/dev/dsp \
-s 29,fbuf,tcp=0.0.0.0:5904,w=1500,h=950 \
-s 30,xhci,tablet \
-s 31,lpc \
-l bootrom,/usr/local/share/uefi-firmware/BHYVE_BHF_CODE.fd \
vm4 < /dev/null & sleep 2 && vncviewer 0:4


Exited with this error :


bhyve: Warning: Unable to reuse host address of Graphics Stolen Memory.
GPU passthrough might not work properly.
bhyve: gvt_d_setup_opregion: Unable to get OpRegion base and length
bhyve: gvt_d_init: Unable to setup OpRegion
device emulation initialization error: Operation not supported by device


The solution suggested by Corvin has been the following one :

Make sure your GPU is booted in UEFI and not CSM mode.

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