linux-kernel - Re: [PATCH v3 0/6] Rust: support `CPU

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Message-ID: <6d898710-6864-4a1b-81d3-49a7dd41c166@proton.me>
Date: Thu, 25 Jul 2024 19:10:27 +0000
From: Benno Lossin <benno.lossin@...ton.me>
To: Miguel Ojeda <ojeda@...nel.org>, Josh Poimboeuf <jpoimboe@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, Masahiro Yamada <masahiroy@...nel.org>
Cc: x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>, Wedson Almeida Filho <wedsonaf@...il.com>, Alex Gaynor <alex.gaynor@...il.com>, Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, Björn Roy Baron <bjorn3_gh@...tonmail.com>, Andreas Hindborg <a.hindborg@...sung.com>, Alice Ryhl <aliceryhl@...gle.com>, rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org, patches@...ts.linux.dev, linux-kbuild@...r.kernel.org
Subject: Re: [PATCH v3 0/6] Rust: support `CPU_MITIGATIONS` and enable `objtool`

On 25.07.24 20:33, Miguel Ojeda wrote:
> Hi,
> 
> This is just v2 with the helper function suggested by Peter.
> 
> I dropped Benno's and Alice's Tested-bys from the modified patch, just
> in case, but the logic should be equivalent.

I re-ran my tests and the results are the same as with v1.

Tested-by: Benno Lossin <benno.lossin@...ton.me>

---
Cheers,
Benno

> Cheers,
> Miguel
> 
> v3:
>   - Added `is_rust_noreturn()` helper function (Peter).
>   - Reworded a couple bits.
> 
> v2: https://lore.kernel.org/rust-for-linux/20240724161501.1319115-1-ojeda@kernel.org/
> v1: https://lore.kernel.org/rust-for-linux/20231023174449.251550-1-ojeda@kernel.org/
> 
> Miguel Ojeda (6):
>   rust: module: add static pointer to `{init,cleanup}_module()`
>   x86/rust: support MITIGATION_RETPOLINE
>   x86/rust: support MITIGATION_RETHUNK
>   x86/rust: support MITIGATION_SLS
>   objtool/rust: list `noreturn` Rust functions
>   objtool/kbuild/rust: enable objtool for Rust
> 
>  arch/x86/Makefile               |  7 ++++-
>  rust/Makefile                   | 22 +++++++++------
>  rust/macros/module.rs           | 12 +++++++++
>  scripts/Makefile.build          |  9 +++++--
>  scripts/generate_rust_target.rs | 15 +++++++++++
>  tools/objtool/check.c           | 48 ++++++++++++++++++++++++++++++++-
>  tools/objtool/noreturns.h       |  2 ++
>  7 files changed, 103 insertions(+), 12 deletions(-)
> 
> 
> base-commit: b1263411112305acf2af728728591465becb45b0
> --
> 2.45.2