KernelCI wanted features & bugfixes

[ojeda]

Features that we would like to see

Required (we almost certainly want them)

• Automatically determining the right Rust version to use.

  • The kernel currently only supports one Rust version at a time. It would be great to support several Rust versions at a time so that the right one is picked to compile a given kernel.
  • Apparently hard to do in the legacy system, but perhaps it is possible to have a single "universal" image with a rustc binary that redirects to the right one. In other words, for the purposes of KernelCI, Rust would have a single toolchain version.

• Enable KUnit tests.

  • i.e. CONFIG_RUST_KERNEL_DOCTESTS.

Nice to have (not critical, we could workaround if needed, etc.)

Low priority (we will likely not use them in the end)

Done (stabilized, fixed, not needed anymore, etc.)

• Rust support.

  • Issue: Rust support kernelci/kernelci-core#814.
  • PR: config: add rust build configurations kernelci/kernelci-core#1468.

• Rust 1.66.0.

  • PR: Rust 1.66.0 kernelci/kernelci-core#1597.

• Disable IBT/Retpoline/Rethunk.

  • Issue: objtool warnings in KernelCI report #945.
  • PR: build-configs: rust: disable IBT/Retpoline/Rethunk for the moment kernelci/kernelci-core#1580.

• Rust 1.68.2.

  • PR: config: add rustc-1.68 build environment kernelci/kernelci-core#1890.
  • PR: build-configs.yaml: move rust-next to Rust 1.68 kernelci/kernelci-core#1926.

• Rust 1.71.1 and bindgen 0.65.1.

  • PR: Rust 1.71.1 and bindgen 0.65.1 kernelci/kernelci-core#2039.

• Rust 1.72.0 and delete rust-for-linux_rust build config.

  • PR: Rust 1.72.1 and delete rust-for-linux_rust build config kernelci/kernelci-core#2068.

• Rust 1.73.0.

  • PR: Rust 1.73 kernelci/kernelci-core#2124.

• Rust 1.74.1.

  • PR: Rust 1.74 kernelci/kernelci-core#2250.

• Rust 1.75.0.

  • PR: Rust 1.75 kernelci/kernelci-core#2321.

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Bugs that we would like to see fixed

Required (we almost certainly want them)

Nice to have (probably not critical, we could workaround if needed, etc.)

Low priority (we will likely not use them in the end)

Done (stabilized, fixed, or not needed anymore, etc.)

[aliceinwire]

@ojeda both PR merged. thanks