Rust for powerpc

[mpe]

Meta issue tracking the state of Rust support in the kernel for powerpc.

Basic support

• [x] ppc64le supported in Rust-for-Linux/rust
• [ ] ppc64 support ?
• [ ] ppc32 support ?

Upstream support

• [ ] Rust build support in Github Actions for snowpatch
• [ ] Rust build support in mpe's CI scripts
• [ ] Rust build support in other CI?
• [ ] Clean up and merge of Rust for powerpc support code

Blockers for actual usage

• [ ] Mixed Rust (LLVM) / GCC build supported ?
• [ ] Distros switch to clang build ? (unlikely)
  • [ ] clang doesn't support -fpatchable-function-entry for ppc64le
• [ ] GCC Rust support merged and available ?
• [ ] ppc64le upgraded to Rust Tier 1 status
• [ ] Distro support for Rust build (for some set of distros)

[ruscur]

Clean up and merge of Rust for powerpc support code

Is that referring to bits in Rust-for-Linux/linux that isn't upstream yet?

[mpe]

Clean up and merge of Rust for powerpc support code

Is that referring to bits in Rust-for-Linux/rust that isn't upstream yet?

Yes. It may just be the select HAVE_RUST in arch/powerpc/Kconfig, but I haven't looked at the diff lately between Rust-for-Linux/rust and mainline.