On Mon, Feb 12, 2024 at 12:36 PM Sami Tolvanen <samitolvanen@xxxxxxxxxx> wrote: > > On Mon, Feb 12, 2024 at 11:04 AM Ramon de C Valle <rcvalle@xxxxxxxxxx> 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?
