nukosu/etc/default/grub
GRUB_CMDLINE_LINUX="intel_iommu=on iommu=pt vfio-pci.ids=foo,bar video=efifb:off"
/etc/modprobe.d/blacklist.conf
blacklist amdgpu
modprobe vfio_iommu_type1
dracut -o amdgpu --force --verbose
GUEST domain
<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0' > <qemu:commandline>
<qemu:arg value='-s'/> </qemu:commandline>
GUEST kernel params
grubby --update-kernel=ALL --args="console=ttyS0,115200 kgdboc=ttyS0,115200"