On Wed, Jul 24, 2024 at 6:15 PM Miguel Ojeda <ojeda@xxxxxxxxxx> wrote: > > Hi, > > This is an updated series to the CPU mitigations support for Rust. It > also has the patch to enable `objtool`, so that we can start running it > for Rust. > > It would be nice to get this applied soon, so that we start being > warning-free (since we already get warnings under IBT builds via > `vmlinux.o`). I am happy to take it through the Rust tree if the x86 and > objtool maintainers give an Acked-by, or through any of the other trees, > as you prefer. Otherwise, I think at this point we would need to make > Rust exclusive to the mitigations, which isn't great. > > With this series, again, x86_64 is warning-free with `objtool` enabled. I > tested `-O2`/`-Os` and the Rust versions we support under `-O2` (mainly > for the `noreturn` patch, which uses heuristics), as well as IBT vs. no > IBT (i.e. running on individual object files vs. in `vmlinux`). I also > did an arm64 build. > > Testing is very welcome for this one! Verified that this eliminates the relevant warnings in an x86 build of the android-mainline kernel. Tested-by: Alice Ryhl <aliceryhl@xxxxxxxxxx>
