WorkingTipsOnNvidiaPassthrough3050

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Edit the grub items:

# vim /etc/default/grub
......
GRUB_CMDLINE_LINUX_DEFAULT="amd_iommu=on iommu=pt kvm.ignore_msrs=1 video=efifb:off"
......
# update-grub2 && reboot

update the initramfs:

# vim /etc/initramfs-tools/modules 
vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd
# update-initramfs -u -k all

Download the nvflash, and them dump the vbios:

$ sudo ./nvflash --save vbios.rom

patch the vbios.rom:

Using an hex editor to open the vbios.rom(via bless vbios.rom):

Search the text VIDEO, place your cursor before the first U before the VIDEO we just searched, and select everything before it, delete all.

Select the pci vfio equipments:

romfile should be specified:

  <rom file="/usr/share/OVMF/nvidia_vbios.rom"/>

Now remove all of the virtual gpu(qxl, virtio-gpu, etc), use nvidia card for boot up. You will get the nvidia card once you installed the nvidia device drivers.