I am trying to figure out how to build a Unified kernel image to boot on
aarch64 based systems. After much googling as Yocto build errors occur,
I have found some information. After much searching and trying I think I
am close. I now have this WKS file:
part /boot --source bootimg-efi
--sourceparams="loader=grub-efi,create-unified-kernel-image=true,initrd=${INITRAMFS_IMAGE}-${MACHINE}.${INITRAMFS_FSTYPES}"
--active --align 4096 --use-uuid
part / --source rootfs --fstype=ext4 --align 4096 --use-uuid
bootloader --timeout=0 --append="console=ttyAMA0,115200n8"
However, I am still missing a piece. I get the error message:
ERROR: Unified Kernel Image EFI stub not found, exiting
This is coming from the scrips/lib/wic/plugins/source/bootimg-efi.py
file. I added a couple of additional prints to get more info:
deploy_dir = get_bitbake_var("DEPLOY_DIR_IMAGE")
print("2 kernel_dir ", kernel_dir)
efi_stub = glob("%s/%s" % (deploy_dir, "linux*.efi.stub"))
print("2 efi_stub ", efi_stub)
if len(efi_stub) == 0:
raise WicError("Unified Kernel Image EFI stub not
found, exiting")
The additionial debug shows the glob() function did not find a file
matching "linux*.efi.stub" in tmp/deploy/images/xxx. Which actually
does not exist.
After much googling and then grepping in the Yocto meta directories I
have not found any reference so far on how to generate the .efi.stub
file. I thought there may be an intermediary file somewhere in the
build/tmp directory but no luck.
Does anybody have pointers on this file? If not is there a suggestion
for a more appropriate list to ask on?
Thanks for any info,
Johnnie Peters
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