[PATCH 0/3] Move memory acceptance x86 arch code into EFI stub

[Ard Biesheuvel]

This is a follow-up to [0].

Move arch_accept_memory(), which is only called by the EFI stub and
never by the decompressor on a non-EFI boot, into the EFI stub, and
avoid relying directly on decompressor APIs such as error().

Instead, call tdx_panic() on a failure to accept memory in a TDX guest.

This makes the decompressor's implementation of panic() obsolete, and
allows it to be removed. This is a prerequisite for dropping the
implementation of snprintf() from the EFI stub entirely, which is what
the series containing [0] implements.

[0] http://lore.kernel.org/r/20260909115530.1924665-13-ardb+git@xxxxxxxxxx

Cc: Kiryl Shutsemau (Meta) <kas@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>

Ard Biesheuvel (3):
  x86/tdx: Share tdx_panic() with the EFI stub
  x86/boot: Move unaccepted memory handling out of the decompressor
  x86/boot: Drop unused implementation of panic()

 arch/x86/boot/compressed/error.c        | 19 ---------
 arch/x86/boot/compressed/error.h        |  1 -
 arch/x86/boot/compressed/mem.c          | 42 --------------------
 arch/x86/boot/compressed/sev.h          |  2 -
 arch/x86/coco/tdx/tdx-shared.c          | 35 ++++++++++++++++
 arch/x86/coco/tdx/tdx.c                 | 35 ----------------
 arch/x86/include/asm/sev.h              |  2 +
 arch/x86/include/asm/shared/tdx.h       |  1 +
 drivers/firmware/efi/libstub/x86-stub.c | 40 +++++++++++++++++++
 9 files changed, 78 insertions(+), 99 deletions(-)


base-commit: cee9395acd8043be0644b25c34bfa86623f2b935
-- 
2.47.3