On Fri, Feb 23, 2024 at 03:45:10PM +0100, Miguel Ojeda wrote: > On Fri, Feb 23, 2024 at 2:38 PM Conor Dooley <conor@xxxxxxxxxx> wrote: > > > > configuring a kernel without symmetrical support for kfi. > > Nit: typo. > > > This probably needs to go to stable. The correct fixes tag for that I am > > not sure of however, but since CFI_CLANG predates RUST, I blamed the > > commit adding rust support. > > Cc'ing Matthew et al. in case this is a problem for them, but I guess > we can relax it later as needed. I suspect that nobody has actually sat down and tried it. I did try to test it but I ran into too many toolchain issues - my older copies of LLVM (pre 17) are not multiarch as I built them by hand with PGO for x86 and RISC-V. My LLVM 17 is from kernel.org and has no libclang. And then the copy of LLVM 18 on kernel.org apparently does not support kcfi at all. I gave up there, but I don't see how this would not be a problem on other arches, given rustc never gets told to enable kcfi. Cheers, Conor.
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