EFI

To use OVMF/AAVMF for EFI add these parameters to qemu-system-*. Normally you can find OVMF_CODE.fd and OVMF_VARS.fd (or variants of them) in /usr/share

-drive if=pflash,format=raw,readonly,file=OVMF_CODE-pure-efi.fd
-drive if=pflash,format=raw,file=OVMF_VARS.fd