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From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
To: Matthew Maurer <mmaurer@google.com>
Cc: "Sami Tolvanen" <samitolvanen@google.com>,
	"Peter Zijlstra" <peterz@infradead.org>,
	rcvalle@google.com, "Miguel Ojeda" <ojeda@kernel.org>,
	"Linus Torvalds" <torvalds@linux-foundation.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, patches@lists.linux.dev,
	"Jarkko Sakkinen" <jarkko@kernel.org>,
	"Kees Cook" <keescook@chromium.org>,
	"Alex Gaynor" <alex.gaynor@gmail.com>,
	"Wedson Almeida Filho" <wedsonaf@google.com>,
	"David Gow" <davidgow@google.com>,
	"Boqun Feng" <boqun.feng@gmail.com>,
	"Gary Guo" <gary@garyguo.net>,
	"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
	"Jonathan Corbet" <corbet@lwn.net>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Ingo Molnar" <mingo@redhat.com>,
	"Borislav Petkov" <bp@alien8.de>,
	"Dave Hansen" <dave.hansen@linux.intel.com>,
	x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
	linux-doc@vger.kernel.org
Subject: Re: [PATCH v10 25/27] x86: enable initial Rust support
Date: Mon, 9 Oct 2023 18:31:13 +0200	[thread overview]
Message-ID: <CANiq72kK6ppBE7j=z7uua1cJMKaLoR5U3NUAZXT5MrNEs9ZhfQ@mail.gmail.com> (raw)
In-Reply-To: <CAGSQo00gJsE+mQObeK4NNGDYLpZDDAZsREr15JcjD8Fo0E4pkw@mail.gmail.com>

On Mon, Oct 9, 2023 at 6:01 PM Matthew Maurer <mmaurer@google.com> wrote:
>
> If the IBT part would be helpful by itself immediately, I can split
> that out - it's only the KCFI portion that won't currently work.

Thanks Matthew. I don't think we are in a rush, but if it is not too
much work to split it, that would be great, instead of adding the
restriction.

For retthunk, by the way, I forgot to mention to Greg above that (in
the original discussion with PeterZ) that I did a quick test back then
to hack the equivalent of `-mfunction-return=thunk-extern` into
`rustc` to show that the compiler could use it via LLVM (by passing
the attribute in the IR). At least at a basic level it seemed to work:
I got a userspace program to count the times that it went through the
return thunk. I didn't try to do anything on the kernel side, but at
least for the compiler side, it seemed OK. So it may be way easier (on
the compiler side) than the CFI work?

Cheers,
Miguel

  reply	other threads:[~2023-10-09 16:31 UTC|newest]

Thread overview: 109+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-27 13:14 [PATCH v10 00/27] Rust support Miguel Ojeda
2022-09-27 13:14 ` [PATCH v10 01/27] kallsyms: use `ARRAY_SIZE` instead of hardcoded size Miguel Ojeda
2022-09-27 14:05   ` Geert Stappers
2022-09-27 14:51   ` Greg Kroah-Hartman
2022-09-28 14:58   ` Wei Liu
2022-09-27 13:14 ` [PATCH v10 02/27] kallsyms: avoid hardcoding buffer size Miguel Ojeda
2022-09-27 14:52   ` Greg Kroah-Hartman
2022-09-28 14:59   ` Wei Liu
2022-09-27 13:14 ` [PATCH v10 03/27] kallsyms: add static relationship between `KSYM_NAME_LEN{,_BUFFER}` Miguel Ojeda
2022-09-27 14:54   ` Greg Kroah-Hartman
2022-09-27 13:14 ` [PATCH v10 04/27] kallsyms: support "big" kernel symbols Miguel Ojeda
2022-09-27 14:55   ` Greg Kroah-Hartman
2022-10-29 17:41   ` Guenter Roeck
2022-10-29 18:23     ` Guenter Roeck
2022-09-27 13:14 ` [PATCH v10 05/27] kallsyms: increase maximum kernel symbol length to 512 Miguel Ojeda
2022-09-27 14:56   ` Greg Kroah-Hartman
2022-09-27 13:14 ` [PATCH v10 06/27] rust: add C helpers Miguel Ojeda
2022-09-27 14:59   ` Greg Kroah-Hartman
2022-09-27 13:14 ` [PATCH v10 07/27] rust: import upstream `alloc` crate Miguel Ojeda
2022-09-27 13:14 ` [PATCH v10 08/27] rust: adapt `alloc` crate to the kernel Miguel Ojeda
2022-09-27 13:51   ` Konstantin Shelekhin
2022-09-27 14:06     ` Miguel Ojeda
2022-09-27 15:13       ` Konstantin Shelekhin
2022-09-27 16:01         ` Miguel Ojeda
2022-09-27 15:35   ` Greg Kroah-Hartman
2022-09-28 15:10   ` Wei Liu
2022-09-28 15:25     ` Miguel Ojeda
2022-09-28 15:27       ` Wei Liu
2022-09-27 13:14 ` [PATCH v10 09/27] rust: add `compiler_builtins` crate Miguel Ojeda
2022-09-28 13:25   ` Wei Liu
2022-09-27 13:14 ` [PATCH v10 10/27] rust: add `macros` crate Miguel Ojeda
2022-09-27 13:48   ` Konstantin Shelekhin
2022-09-27 13:59     ` Geert Stappers
2022-09-27 14:01     ` Miguel Ojeda
2022-09-28 15:29   ` Wei Liu
2022-09-28 16:36     ` Miguel Ojeda
2022-09-27 13:14 ` [PATCH v10 11/27] rust: add `bindings` crate Miguel Ojeda
2022-09-27 15:23   ` Greg Kroah-Hartman
2022-09-27 13:14 ` [PATCH v10 12/27] rust: add `kernel` crate Miguel Ojeda
2022-09-27 15:22   ` Greg Kroah-Hartman
2022-09-27 15:36     ` Alex Gaynor
2022-09-27 15:43     ` Miguel Ojeda
2022-09-27 13:14 ` [PATCH v10 13/27] rust: export generated symbols Miguel Ojeda
2022-09-27 15:32   ` Greg Kroah-Hartman
2022-09-27 13:14 ` [PATCH v10 14/27] vsprintf: add new `%pA` format specifier Miguel Ojeda
2022-09-27 15:00   ` Greg Kroah-Hartman
2022-09-28 10:09   ` Sergey Senozhatsky
2022-09-27 13:14 ` [PATCH v10 15/27] scripts: checkpatch: diagnose uses of `%pA` in the C side as errors Miguel Ojeda
2022-09-27 15:03   ` Greg Kroah-Hartman
2022-09-27 13:14 ` [PATCH v10 16/27] scripts: checkpatch: enable language-independent checks for Rust Miguel Ojeda
2022-09-27 15:02   ` Greg Kroah-Hartman
2022-09-27 13:14 ` [PATCH v10 17/27] scripts: decode_stacktrace: demangle Rust symbols Miguel Ojeda
2022-09-27 15:02   ` Greg Kroah-Hartman
2022-09-27 13:14 ` [PATCH v10 18/27] scripts: add `generate_rust_analyzer.py` Miguel Ojeda
2022-09-27 13:14 ` [PATCH v10 19/27] scripts: add `generate_rust_target.rs` Miguel Ojeda
2022-09-27 13:14 ` [PATCH v10 20/27] scripts: add `rust_is_available.sh` Miguel Ojeda
2022-09-28 14:49   ` Wei Liu
2022-09-27 13:14 ` [PATCH v10 21/27] scripts: add `is_rust_module.sh` Miguel Ojeda
2022-09-27 15:26   ` Greg Kroah-Hartman
2022-09-27 13:14 ` [PATCH v10 22/27] rust: add `.rustfmt.toml` Miguel Ojeda
2022-09-28 13:30   ` Wei Liu
2022-09-27 13:14 ` [PATCH v10 23/27] Kbuild: add Rust support Miguel Ojeda
2022-09-27 15:30   ` Greg Kroah-Hartman
2022-09-28 14:56   ` Wei Liu
2022-09-27 13:14 ` [PATCH v10 24/27] docs: add Rust documentation Miguel Ojeda
2022-09-27 13:14 ` [PATCH v10 25/27] x86: enable initial Rust support Miguel Ojeda
2022-09-27 15:31   ` Greg Kroah-Hartman
2022-09-28 14:32   ` Wei Liu
2022-09-28 16:39     ` Miguel Ojeda
2022-10-07 17:17   ` Peter Zijlstra
2022-10-10 23:15     ` Sami Tolvanen
2022-10-11  8:04       ` Peter Zijlstra
2022-10-14 17:23         ` Miguel Ojeda
2022-10-14 17:25           ` Boqun Feng
2022-10-14 18:05       ` Miguel Ojeda
2022-10-14 18:34         ` Sami Tolvanen
2022-10-14 20:39           ` Miguel Ojeda
2023-10-09 16:00             ` Matthew Maurer
2023-10-09 16:31               ` Miguel Ojeda [this message]
2023-10-09 17:37                 ` Greg Kroah-Hartman
2023-10-12 10:47           ` Peter Zijlstra
2023-10-12 17:50             ` Sami Tolvanen
2023-10-12 18:31               ` Kees Cook
2023-10-12 22:26                 ` Ramon de C Valle
     [not found]                 ` <CAOcBZOTed1a1yOimdUN9yuuysZ1h6VXa57+5fLAE99SZxCwBMQ@mail.gmail.com>
2023-10-13  7:50                   ` Peter Zijlstra
2023-10-13 12:17                     ` Ramon de C Valle
2023-10-13 18:54                       ` Linus Torvalds
2023-10-13 19:00                         ` H. Peter Anvin
2023-10-13 19:22                           ` Linus Torvalds
2023-10-14 20:25                           ` comex
2023-10-14 20:50                             ` H. Peter Anvin
2022-09-27 13:14 ` [PATCH v10 26/27] samples: add first Rust examples Miguel Ojeda
2022-09-27 15:25   ` Greg Kroah-Hartman
2022-09-28 14:23   ` Wei Liu
2022-09-27 13:14 ` [PATCH v10 27/27] MAINTAINERS: Rust Miguel Ojeda
2022-09-27 14:11   ` Geert Stappers
2022-09-27 15:19     ` Kees Cook
2022-09-27 15:34       ` Greg Kroah-Hartman
2022-09-27 15:53         ` Miguel Ojeda
2022-09-27 16:39           ` Greg Kroah-Hartman
2022-09-27 18:14             ` Kees Cook
2022-09-28  0:11           ` Kees Cook
2022-09-28 11:57             ` Wedson Almeida Filho
2022-09-28 12:22               ` Miguel Ojeda
2022-09-27 16:00       ` Wedson Almeida Filho
2022-09-27 16:38   ` Greg Kroah-Hartman
2022-09-28 15:06 ` [PATCH v10 00/27] Rust support Wei Liu
2022-09-28 15:34   ` Miguel Ojeda
2022-09-28 15:40     ` Wei Liu

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