Hi Peter,
Please make sure your GPU is booted in UEFI and not CSM mode. This can be changed in the host BIOS. Cheers. On Sat, Jan 4, 2025 at 9:24 PM Peter Wood <[email protected]> wrote: > Happy new year all. > > I've been using bhyve happily for a year or two now, multiple machines > with VT-d running happily passing SAS cards and USB cards into VMs. > > I've reached the point where I want to pass a GPU in for accelerated > encoding/decoding/etc (scrypted, tdarr, jellyfin). I picked up an Intel ARC > A380, as it's encoders/decoders are pretty decent for my use case - I'd > also seen that there had been success with people using the iGPU's in Intel > CPUs successfully. > > Unfortunately after attaching the GPUs PCI device to ppt, and attempting > to start a VM with it attached, I'm greated by an error that seems to focus > on iGPUs? > > /usr/sbin/bhyve -A -H -w -u -S -c 2 -m 8G -l com1,/dev/nmdm202B -l > bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd,/usr/local/var/cache/bmd/k8s-worker-3.vars > -s 0,hostbridge -s 1,lpc -s 2,nvme,/dev/zvol/vm/k8s-worker-3 -s > 3,ahci-cd,/mnt/vm/isos/ubuntu-24.04-live-server-amd64.iso -s > 5,virtio-net,tap9 -s 4,passthru,4/0/0 -s > 6,fbuf,tcp=0.0.0.0:6007,w=1280,h=720,vga=io > -s 7,xhci,tablet test > bhyve: Warning: Unable to reuse host address of Graphics Stolen Memory. > GPU passthrough might not work properly. > bhyve: gvt_d_setup_opregion: Invalid OpRegion signature > bhyve: gvt_d_init: Unable to setup OpRegion > Device emulation initialization error: No such file or directory > > The machine is an AMD EPYC 7343 on a ASRock ROMED8-2T, it has a dedicated > onboard GPU (attached to the BMC), which the BIOS is configured to > encourage operating systems to use as the primary display - and sure enough > the loader and BSD console are presented through the BMCs ASPEED AST2500. > > Digging through the freebsd source tree, it appears that that pci_gvt-d.c > is responsible for this, if it's Intel and a Display then attempt the set > up of graphics memory. > > https://github.com/freebsd/freebsd-src/blob/b662ca1d6cd82044c6cb79075e1830b97594bef3/usr.sbin/bhyve/amd64/pci_gvt-d.c#L44 > > Has anyone experimented with this? Can I just patch this out, rebuild > bhyve and expect a chance of success? > > Cheers, > > P. > -- > *Peter Wood* > [email protected] > > -- Mario.
