linux-kernel - Re: [PATCH] x86/Kconfig: make CFI_AUTO

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Message-ID: <CANiq72=eMued_fEb8j8auBmEUiQ7Cnh7fQiTv-kMeKgh-JALFA@mail.gmail.com>
Date: Fri, 9 May 2025 21:33:02 +0200
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Paweł Anikiel <panikiel@...gle.com>
Cc: Alice Ryhl <aliceryhl@...gle.com>, Peter Zijlstra <peterz@...radead.org>, 
	Kees Cook <kees@...nel.org>, Sami Tolvanen <samitolvanen@...gle.com>, 
	Alex Gaynor <alex.gaynor@...il.com>, Borislav Petkov <bp@...en8.de>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, Ingo Molnar <mingo@...hat.com>, 
	Josh Poimboeuf <jpoimboe@...nel.org>, Masahiro Yamada <masahiroy@...nel.org>, 
	Miguel Ojeda <ojeda@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, 
	Nathan Chancellor <nathan@...nel.org>, x86@...nel.org, linux-kernel@...r.kernel.org, 
	rust-for-linux@...r.kernel.org, Matthew Maurer <mmaurer@...gle.com>, 
	Ramon de C Valle <rcvalle@...gle.com>
Subject: Re: [PATCH] x86/Kconfig: make CFI_AUTO_DEFAULT depend on !RUST

On Fri, May 9, 2025 at 11:12 AM Paweł Anikiel <panikiel@...gle.com> wrote:
>
> On Fri, May 9, 2025 at 11:04 AM Miguel Ojeda
> <miguel.ojeda.sandonis@...il.com> wrote:
> >
> > I thought the intention was to avoid disabling FineIBT at config time:
> > https://lore.kernel.org/all/202504161442.66CE2596@keescook/
>
> I think you mean enabling FineIBT - yes, this patch does exactly that,
> it's still possible to enable it by hand with cfi=

No, I meant avoiding to disable it at config time due to the rehash
discussion between Peter & Kees in the Lore link I mentioned (I see
Kees has replied again -- thanks!)

Cheers,
Miguel