Re: [tip: x86/core] x86/ibt: Implement FineIBT-BHI mitigation
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- Subject: Re: [tip: x86/core] x86/ibt: Implement FineIBT-BHI mitigation
- From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
- Date: Wed, 12 Mar 2025 10:16:33 +0100
- Cc: Miguel Ojeda <miguel.ojeda.sandonis@xxxxxxxxx>, Matthew Maurer <mmaurer@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, ojeda@xxxxxxxxxx, linux-tip-commits@xxxxxxxxxxxxxxx, Scott Constable <scott.d.constable@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Kees Cook <kees@xxxxxxxxxx>, x86@xxxxxxxxxx, Sami Tolvanen <samitolvanen@xxxxxxxxxx>, Alice Ryhl <aliceryhl@xxxxxxxxxx>
- In-reply-to: <CAOcBZOQnGCqKut-BTvfJNgB9Rz+f5DAANwMs9DU16Js+QDGOrw@mail.gmail.com>
- References: <20250224124200.820402212@infradead.org> <174057447519.10177.9447726208823079202.tip-bot2@tip-bot2> <20250226195308.GA29387@noisy.programming.kicks-ass.net> <CANiq72=3ghFxy8E=AU9p+0imFxKr5iU3sd0hVUXed5BA+KjdNQ@mail.gmail.com> <20250310160242.GH19344@noisy.programming.kicks-ass.net> <CAOcBZOSPBsTvWFdpwE0-ZU76yMDGBEo3p9y614XYEu+ZSnQ6Sg@mail.gmail.com> <CANiq72mcCEbeWb-RAXLcWRnJms2LA6xV=QqQ5=N3ii=3TC89fw@mail.gmail.com> <CAOcBZOQnGCqKut-BTvfJNgB9Rz+f5DAANwMs9DU16Js+QDGOrw@mail.gmail.com>
On Tue, Mar 11, 2025 at 01:23:39PM -0700, Ramon de C Valle wrote:
> On Tue, Mar 11, 2025 at 12:41 PM Miguel Ojeda
> <miguel.ojeda.sandonis@xxxxxxxxx> wrote:
> >
> > On Tue, Mar 11, 2025 at 8:09 PM Ramon de C Valle <rcvalle@xxxxxxxxxx> wrote:
> > >
> > > I've submitted a PR for it:
> > > https://github.com/rust-lang/rust/pull/138368. Let me know if you're
> > > able to give it a try.
> >
> > Thanks Ramon, that was quick!
> >
> > Left a comment there and linked it -- if you meant to ask Peter, then
> > I guess it would be easiest for him to use the first nightly that has
> > it as a `-Z` flag.
> >
> > i.e. I think it is simple enough to land it as-is, especially if we
> > add the quick check I suggested.
>
> Left a note there. Let me know what you think. Yes, I guess we could
> just check the next nightly that has those changes.
The rust-log-analyzer seems to suggest the nightly build failed?
Suppose it didn't fail, where do I find it?
I normally build llvm toolchains using tc-build, but it seems rust is
not actually part of llvm?
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