linux-kernel - Re: [PATCH v3 02/19] x86/boot: Move mem_encrypt= parsing to the decompressor

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Message-ID: <20240131092952.GCZboTECip8DbWtYtz@fat_crate.local>
Date: Wed, 31 Jan 2024 10:29:52 +0100
From: Borislav Petkov <bp@...en8.de>
To: Ard Biesheuvel <ardb@...nel.org>
Cc: Ard Biesheuvel <ardb+git@...gle.com>, linux-kernel@...r.kernel.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>, Arnd Bergmann <arnd@...db.de>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>,
	Kees Cook <keescook@...omium.org>, Brian Gerst <brgerst@...il.com>,
	linux-arch@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH v3 02/19] x86/boot: Move mem_encrypt= parsing to the
 decompressor

On Wed, Jan 31, 2024 at 10:12:13AM +0100, Ard Biesheuvel wrote:
> The reason we need two flags is because there is no default value to
> use when the command line param is absent.

I think absent means memory encryption disabled like with every other
option which is not present...

> There is CONFIG_AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT but that one is AMD

.. yes, and I'm thinking that it is time we kill this. I don't think
anything uses it. It was meant well at the time.

Let's wait for Tom to wake up first, though, as he might have some
objections...

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette