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UEFI specification 2.9A requires to display the EUI-64 "in hexadecimal format with byte 7 first (i.e., on the left) and byte 0 last". This is in contrast to what the NVMe specification wants. But it is what EDK II has been implementing. Here is an example with the patch applied: qemu-system-aarch64 -machine virt -cpu cortex-a72 -nographic \ -bios denx/u-boot.bin \ -device nvme,id=nvme1,serial=9ff81223 \ -device nvme-ns,bus=nvme1,drive=nvme1n0,eui64=0x123456789ABCDEF0 \ -drive file=arm64.img,if=none,format=raw,id=nvme1n0 => nvme scan => efidebug devices Device Path ==================== /VenHw(…)/NVMe(0x1,f0-de-bc-9a-78-56-34-12) Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>