linux-kernel - Re: [PATCH v1 0/2] RISC-V: enable rust

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Date: Fri, 9 Feb 2024 15:18:22 +0000
From: Conor Dooley <conor@...nel.org>
To: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
Cc: Conor Dooley <conor.dooley@...rochip.com>,
	linux-riscv@...ts.infradead.org, Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Wedson Almeida Filho <wedsonaf@...il.com>,
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Jonathan Corbet <corbet@....net>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Tom Rix <trix@...hat.com>, rust-for-linux@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	llvm@...ts.linux.dev, Matthew Maurer <mmaurer@...gle.com>,
	Ramon de C Valle <rcvalle@...gle.com>,
	Sami Tolvanen <samitolvanen@...gle.com>
Subject: Re: [PATCH v1 0/2] RISC-V: enable rust

On Sat, Jan 27, 2024 at 02:46:38PM +0100, Miguel Ojeda wrote:
> On Fri, Jan 26, 2024 at 11:01 PM Conor Dooley <conor@...nel.org> wrote:
> >
> > Is that even needed? We already have ARCH_SUPPORTS_CFI_CLANG and AFAIU
> > rust supports it if clang does, so a second option is superfluous?
> 
> From a quick look, I don't see it enabled in any RISC-V built-in
> target in `rustc` yet.
> 
> It may also still be the case that KCFI needs some tweaks for, say,
> RISC-V, before the flag actually works, i.e. we couldn't just test the
> flag in that case -- Ramon: how likely is it that RISC-V would work if
> KCFI works for aarch64 and x86_64?

Well, there's been no reply here. I'll do sa you suggested and add a 
depends on !CFI_CLANG to RUST.

Cheers,
Conor.


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