Hi Anthony, I am trying to run a DomU guest using OVMF. I have built xen staging with --with-ovmf option. I am able to install a new guest but I am unable to boot it (see the attached image). The xl.cfg file I am using: name='test_uefi' memory=16384 disk=['file:/home/IMAGES/FEDORA/FC25/Fedora-Server-dvd-x86_64-25-1.3.iso,hdc:cdrom,r','/Repo/VM/test_uefi/System_UEFI.qcow2,raw,hda,w'] #disk=['/Repo/VM/test_uefi/System_UEFI.qcow2,raw,hda,w'] vif=['mac=00:16:3e:ff:ee:01,bridge=xenbr0', 'mac=00:16:3e:ff:00:01,bridge=xenbr2'] guest_os_type='default' bios='ovmf' serial='pty' xen_platform_pci=0 device_model_version='qemu-xen' builder='hvm' on_poweroff='destroy' boot='dc' vnc=1 vnclisten='0.0.0.0:5' stdvga=1 videoram=16 on_crash='restart' on_reboot='restart' vcpus=8 maxmem=16384 Konrad Wilk suggested me to use try adding: device_model_args_hvm=["fw_cfg","file=./my_blob.bin"]; But that didn't work. I also tried something similar to how KVM uses: device_model_args_hvm=['-drive','file=/Repo/VM/perf1_uefi/OVMF_VARS.fd,if=pflash,format=raw,unit=1']; It also didn't work. How do you specify the NVRAM image to store the boot order? Thanks for your help. -- Regards, Marcos Eduardo Matsunaga Linux & Virtualization Corp Architecture - Development “The statements and opinions expressed here are my own and do not necessarily represent those of Oracle Corporation.”