[Bug 2018235] Re: Kernel with CONFIG_EFI_ZBOOT not supported

[Julian Andres Klode]

*** This bug is a duplicate of bug 2002226 ***
    https://bugs.launchpad.net/bugs/2002226

** This bug has been marked a duplicate of bug 2002226
   Support for kernels compiled with CONFIG_EFI_ZBOOT

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Title:
  Kernel with CONFIG_EFI_ZBOOT not supported

Status in grub2 package in Ubuntu:
  New

Bug description:
  We use GRUB 2.06 to load kernels with an EFI stub using the linux
  command. To ensure that the loaded EFI binary is really a kernel GRUB
  checks for specific bytes which are not defined by the EFI
  specification, e.g. on RISC-V it looks for
  GRUB_LINUX_RISCV_MAGIC_SIGNATURE ('RSC\0x05').

  These checks have been removed in upstream GRUB with commits
  69edb3120560 ("loader/arm64/linux: Remove magic number header field
  check") and 067bd35cd420 ("efi: Remove arch specific image headers for
  RISC-V, ARM64 and ARM").

  When compiling the arm64 or riscv64 kernel with CONFIG_EFI_ZBOOT the
  kernel specific signatures are not exposed.

  Please, adjust our GRUB to be compliant with the EFI specification and
  to support the upstream kernel.

  Best regards

  Heinrich

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