[PATCH 0/6] x86: head_64.S spring cleaning

[Ard Biesheuvel <ardb@kernel.org>]

After doing some cleanup work on the EFI code in head_64.S, the mixed
mode code in particular, I noticed that the memory encryption pieces
could use some attention as well, so I cleaned that up too.

I have been sitting on these patches since November, waiting for the
right time to post them, i.e., after the SEV/SNP review had finished.
This has yet to happen, so I'm posting them now instead. Please feel
free to disregard for the time being, and propose a suitable timeframe
to repost them if this is likely to conflict with ongoing work.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Michael Roth <michael.roth@amd.com>

Ard Biesheuvel (6):
  x86/head_64: clean up mixed mode 32-bit entry code
  efi/x86: simplify IDT/GDT preserve/restore
  x86/compressed: move startup32_load_idt() out of startup code
  x86/compressed: move startup32_check_sev_cbit out of startup code
  x86/compressed: adhere to calling convention in
    get_sev_encryption_bit()
  x86/compressed: only build mem_encrypt.S if AMD_MEM_ENCRYPT=y

 arch/x86/boot/compressed/Makefile       |   8 +-
 arch/x86/boot/compressed/efi_mixed.S    | 352 ++++++++++++++++++++
 arch/x86/boot/compressed/efi_thunk_64.S | 195 -----------
 arch/x86/boot/compressed/head_32.S      |   4 -
 arch/x86/boot/compressed/head_64.S      | 309 +----------------
 arch/x86/boot/compressed/mem_encrypt.S  | 146 +++++++-
 drivers/firmware/efi/libstub/x86-stub.c |   3 +-
 7 files changed, 506 insertions(+), 511 deletions(-)
 create mode 100644 arch/x86/boot/compressed/efi_mixed.S
 delete mode 100644 arch/x86/boot/compressed/efi_thunk_64.S

-- 
2.35.1