linux-kernel - Re: [PATCH v7 5/9] efi/libstub: Add generic support for parsing mem

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Message-ID: <20240301161641.GMZeH_aUvBvKZjBIpl@fat_crate.local>
Date: Fri, 1 Mar 2024 17:16:41 +0100
From: Borislav Petkov <bp@...en8.de>
To: Ard Biesheuvel <ardb+git@...gle.com>
Cc: linux-kernel@...r.kernel.org, Ard Biesheuvel <ardb@...nel.org>,
	Kevin Loughlin <kevinloughlin@...gle.com>,
	Tom Lendacky <thomas.lendacky@....com>,
	Dionna Glaze <dionnaglaze@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Andy Lutomirski <luto@...nel.org>, Brian Gerst <brgerst@...il.com>
Subject: Re: [PATCH v7 5/9] efi/libstub: Add generic support for parsing
 mem_encrypt=

On Tue, Feb 27, 2024 at 04:19:13PM +0100, Ard Biesheuvel wrote:
> From: Ard Biesheuvel <ardb@...nel.org>
> 
> 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@...nel.org>
> ---
>  drivers/firmware/efi/libstub/efi-stub-helper.c | 8 ++++++++
>  drivers/firmware/efi/libstub/efistub.h         | 2 +-
>  2 files changed, 9 insertions(+), 1 deletion(-)

Reviewed-by: Borislav Petkov (AMD) <bp@...en8.de>

-- 
Regards/Gruss,
    Boris.

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