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    SubjectRe: [PATCH v10 25/27] x86: enable initial Rust support
    On Fri, Oct 7, 2022 at 10:18 AM Peter Zijlstra <peterz@infradead.org> wrote:
    >
    > On Tue, Sep 27, 2022 at 03:14:56PM +0200, Miguel Ojeda wrote:
    > > Note that only x86_64 is covered and not all features nor mitigations
    > > are handled, but it is enough as a starting point and showcases
    > > the basics needed to add Rust support for a new architecture.
    >
    > Does it fail the build if required options are missing? Specifically are
    > things like kCFI and IBT enabled? Silently not handling those will
    > result in an unbootable image.

    Rust supports IBT with -Z cf-protection=branch, but I don't see this
    option being enabled in the kernel yet. Cross-language CFI is going to
    require a lot more work though because the type systems are not quite
    compatible:

    https://github.com/rust-lang/rfcs/pull/3296

    Sami

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