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

[Ramon de C Valle]

On Mon, Feb 12, 2024 at 12:36 PM Sami Tolvanen <samitolvanen@googlecom> wrote:
>
> On Mon, Feb 12, 2024 at 11:04 AM Ramon de C Valle <rcvalle@googlecom> wrote:
> >
> > Sorry for the late reply. Sami might be the best person to answer
> > this, but KCFI (not CFI) tests are lowered by passes that are
> > architecture specific (see https://reviews.llvm.org/D119296), so we'd
> > need to add support for RISC-V. There is no additional work required
> > in the Rust compiler besides enabling it for the new target.
>
> LLVM 17 added KCFI support for RISC-V. Sounds like it's just a
> question of whether rustc uses a new enough version of LLVM then?

rustc is using LLVM 17 since
https://github.com/rust-lang/rust/pull/114048, so I guess I can enable
it for RISC-V targets in
https://github.com/rust-lang/rust/tree/master/compiler/rustc_target/src/spec/targets,
and the Linux kernel will get it on the next compiler update?