[PATCH v3 00/17] 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.

Changes since v2:
- add some clarifying comments to the EFI mixed mode changes
- include patch to make the EFI handover protocol optional that was sent
  out separately before
- rebase onto tip/master

Changes since v1:
- at Boris's request, split the patches into smaller ones that are
  easier to review

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 (17):
  x86/compressed: efi-mixed: rename efi_thunk_64.S to efi-mixed.S
  x86/compressed: efi-mixed: move 32-bit entrypoint code into .text
    section
  x86/compressed: efi-mixed: move bootargs parsing out of 32-bit startup
    code
  x86/compressed: efi-mixed: move efi32_pe_entry into .text section
  x86/compressed: efi-mixed: move efi32_entry out of head_64.S
  x86/compressed: efi-mixed: move efi32_pe_entry() out of head_64.S
  x86/compressed: efi: merge multiple definitions of image_offset into
    one
  x86/compressed: efi-mixed: simplify IDT/GDT preserve/restore
  x86/compressed: avoid touching ECX in startup32_set_idt_entry()
  x86/compressed: pull global variable ref up into startup32_load_idt()
  x86/compressed: move startup32_load_idt() into .text section
  x86/compressed: move startup32_load_idt() out of head_64.S
  x86/compressed: move startup32_check_sev_cbit() into .text
  x86/compressed: move startup32_check_sev_cbit() out of head_64.S
  x86/compressed: adhere to calling convention in
    get_sev_encryption_bit()
  x86/compressed: only build mem_encrypt.S if AMD_MEM_ENCRYPT=y
  efi: x86: Make the deprecated EFI handover protocol optional

 arch/x86/Kconfig                        |  17 +
 arch/x86/boot/compressed/Makefile       |   8 +-
 arch/x86/boot/compressed/efi_mixed.S    | 351 ++++++++++++++++++++
 arch/x86/boot/compressed/efi_thunk_64.S | 195 -----------
 arch/x86/boot/compressed/head_32.S      |   4 -
 arch/x86/boot/compressed/head_64.S      | 303 +----------------
 arch/x86/boot/compressed/mem_encrypt.S  | 152 ++++++++-
 arch/x86/boot/header.S                  |   2 +-
 arch/x86/boot/tools/build.c             |   2 +
 drivers/firmware/efi/libstub/x86-stub.c |   2 +-
 10 files changed, 533 insertions(+), 503 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