kumquat-buildroot/board/qemu/aarch64-sbsa/genimage.cfg

image efi-part.vfat {
	vfat {
		file EFI {
			image = "efi-part/EFI"
		}

		file Image {
			image = "Image"
		}
	}

	size = 64M
}

image disk.img {
	hdimage {
		gpt = true
	}

	partition boot {
		partition-type = 0xEF
		image = "efi-part.vfat"
	}

	partition root {
		partition-type = 0x83
		image = "rootfs.ext2"
	}
}