[PATCH 0/2] efi/libstub/x86: two more tweaks for the EFI stub startup code

[Ard Biesheuvel <ardb@kernel.org>]

Two final cleanups for the x86 startup code, one that helps the compiler
generate better code, by annotating a helper function with the 'const'
function attribute, and one that fixes the misalignment of the stack in
mixed mode.

There are no known issues regarding entering the 32-bit firmware from the
64-bit kernel with the stack misaligned, and the 32-bit kernel does so all
the time, but it is better to comply with the UEFI spec.

Ard Biesheuvel (2):
  efi/libstub/x86: use const attribute for efi_is_64bit()
  efi/libstub/x86: use mandatory 16-byte stack alignment in mixed mode

 arch/x86/boot/compressed/eboot.c        | 14 +++---
 arch/x86/boot/compressed/efi_thunk_64.S | 46 ++++++--------------
 arch/x86/boot/compressed/head_64.S      |  7 ++-
 arch/x86/include/asm/efi.h              |  2 +-
 4 files changed, 23 insertions(+), 46 deletions(-)

-- 
2.20.1