efi/libstub: Add generic support for parsing mem_encrypt=

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Parse the mem_encrypt= command line parameter from the EFI stub if
CONFIG_ARCH_HAS_MEM_ENCRYPT=y, so that it can be passed to the early
boot code by the arch code in the stub.

This avoids the need for the core kernel to do any string parsing very
early in the boot.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20240227151907.387873-16-ardb+git@google.com

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Ard Biesheuvel 2024-02-27 16:19:13 +01:00 • committed by Borislav Petkov (AMD)

parent 8282639576

commit 7205f06e84

2 changed files with 9 additions and 1 deletions

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8

drivers/firmware/efi/libstub/efi-stub-helper.c

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2

drivers/firmware/efi/libstub/efistub.h

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