efivar 36: device_get() failed to parse AArch64 VM disk

[lcp]

The AArch64 VM is created with the following command:

$ qemu-system-aarch64 -enable-kvm -m 1024 -cpu host \
  -machine virt,usb=off,its=off \
  -bios qemu-uefi-aarch64.bin \
  -S \
  -serial file:serial.log \
  -monitor stdio \
  -device virtio-gpu-pci \
  -vnc :94,share=force-shared \
  -device usb-ehci -device usb-kbd -device usb-tablet \
  -device virtio-scsi-pci,id=scsi0 \
  -device virtio-blk-device,drive=hd1,bootindex=0,serial=1 \
  -drive file=disk.img,cache=unsafe,if=none,id=hd1,format=qcow2,discard=on

When creating the boot option with efibootmgr, I got the error message:

# efibootmgr -c -d /dev/vda1 -l "\\EFI\\opensuse\\grubaa64.efi" -v -v -v
Could not prepare Boot variable: Function not implemented
error trace:
 linux.c:454 device_get(): unknown storage interface: Success
 creator.c:194 efi_va_generate_file_device_path_from_esp(): could not get ESP disk info: Function not implemented
 creator.c:340 efi_generate_file_device_path_from_esp(): could not generate File DP from ESP: Function not implemented
 efibootmgr.c:287 make_var(): make_linux_load_option() failed: Function not implemented
 efibootmgr.c:336 make_var(): Could not set variable: Function not implemented

Here is the link of vda1 in /sys/dev/block:

254:1 -> ../../devices/platform/LNRO0005:1f/virtio4/block/vda/vda1

It seems efivar failed to parse "devices/platform/LNRO0005:1f" before reaching "virtio4" so linux-virtblk didn't work.

For reference, this is the boot option created by AAVMF:

Boot0007* Linux Loader  VenHw(837dca9e-e874-4d82-b29a-23fe0e23d1e2,003e000a00000000)/HD(1,GPT,0aa5f275-9ecd-4551-8a06-dd5a1a071804,0x800,0xfa000)/File(\EFI\opensuse\grubaa64.efi)

[lcp]

The acpi-root parser in git HEAD can parse the path correctly. Close this issue.