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[23.128.96.18]) by mx.google.com with ESMTP id a5si13956783plh.240.2022.01.17.04.47.49; Mon, 17 Jan 2022 04:48:01 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=fwl4u4Np; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232029AbiAQFeL (ORCPT + 99 others); Mon, 17 Jan 2022 00:34:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56640 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231935AbiAQFeK (ORCPT ); Mon, 17 Jan 2022 00:34:10 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EB69CC061574; Sun, 16 Jan 2022 21:34:08 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 7D1C7B80DCF; Mon, 17 Jan 2022 05:34:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9BC38C36AED; Mon, 17 Jan 2022 05:34:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642397646; bh=C6zDtYDsuOnD7taun2btsHbFgZ3DATzTwF9t8BIO3DI=; h=From:To:Cc:Subject:Date:From; b=fwl4u4NpMTO+Y6EoXititYC08AT8mMeV5s0qZPXtav9sOn2Ewt9P1U6xd1B+qTmb+ fZEhi97IDarDlxE35CyRKMi6zQFmU+qBhTuvC/o3XPmaJYZB/fDQpL2fZX2+NE6pOh 1h86ddpzCLPK/rUVNb6qNjQXFaoNHTqdjxRUTobmDi1U/Miid5/DYFR0m5gjzMPquA lTTOPKY3rLzBfGhokCp6BinI9KV4E9mu6SdAzAheEH9N8Kb0PcNwcuucjd+BT3UbDl vZDEVRl6bPnXDWUCvJk+CBqAVbVG1dETf1yhSlljTZudAkV94n6brEmDycDxMLPed3 guGxZAZTz4jrA== From: Miguel Ojeda To: Linus Torvalds , Greg Kroah-Hartman Cc: rust-for-linux@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Miguel Ojeda Subject: [PATCH v3 00/19] Rust support Date: Mon, 17 Jan 2022 06:33:30 +0100 Message-Id: <20220117053349.6804-1-ojeda@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Rust support This is the patch series (v3) to add support for Rust as a second language to the Linux kernel. If you are interested in following this effort, please join us in the mailing list at: rust-for-linux@vger.kernel.org and take a look at the project itself at: https://github.com/Rust-for-Linux As usual, special thanks go to ISRG (Internet Security Research Group) and Google for their financial support on this endeavor. Cheers, Miguel -- # Rust support This cover letter explains the major changes and updates done since the previous ones. For those, please see: RFC: https://lore.kernel.org/lkml/20210414184604.23473-1-ojeda@kernel.org/ v1: https://lore.kernel.org/lkml/20210704202756.29107-1-ojeda@kernel.org/ v2: https://lore.kernel.org/lkml/20211206140313.5653-1-ojeda@kernel.org/ ## Infrastructure updates There have been several improvements to the overall Rust support: - The compiler has been upgraded to Rust 1.58.0. - Added automatic detection of whether there is a suitable Rust toolchain available (`CONFIG_RUST_IS_AVAILABLE`, which replaces `HAS_RUST`), and made `CONFIG_RUST` depend on it. It also comes with an easy way for users/developers to understand why the Rust toolchain might not be available: a Makefile target is provided (`rustavailable`) which explains why that is the case, using the same logic that Kbuild/Kconfig use. - Removed the `!COMPILE_TEST` gate, which will eventually allow us to increase testing the Rust support in places that run `all{yes,mod}config`. - Other build system improvements, such as improved cleaning behavior. - Documentation: reorganization, new section on naming, clarifications... One of the unstable features we need, `-Zsymbol-mangling-version=v0`, is getting stabilized in 1.59.0. Another one, `maybe_uninit_extra`, will be in 1.60.0. As usual, please see the following link for the live list of unstable features we are using: https://github.com/Rust-for-Linux/linux/issues/2 ## Abstractions and driver updates Some of the improvements to the abstractions and example drivers are: - Added `IdArray` and `IdTable` which will be used in buses to allow drivers to specify device ID tables that are guaranteed to be zero-terminated at compile time. - Updated `amba` to use the new constant device ID table support. - Initial common clock framework abstractions. - Platform drivers are now defined by implementing a trait. Includes a new macro for simplified registration of platform drivers and a new sample/template. - `dev_*` printing macros. - `{read,write}*_relaxed` methods for `IoMem`. - Simplified file operations by removing `FileOpener`. - Added `ThisModule` to the arguments of driver registration. - A basic template for an out-of-tree Linux kernel module written in Rust can be found in: https://github.com/Rust-for-Linux/rust-out-of-tree-module ## Patch series status Like we mentioned last time, the Rust support is still to be considered experimental. However, support is good enough that kernel developers can start working on the Rust abstractions for subsystems and write drivers and other modules. The current series has just arrived in `linux-next`, thus the first run will happen in a day. Similarly, the preview docs for this series can be seen at: https://rust-for-linux.github.io/docs/kernel/ ## Conferences, meetings and liaisons We would want to thank you the venues we were invited to: - Open Source Summit Japan 2021 ## Acknowledgements The signatures in the main commits correspond to the people that wrote code that has ended up in them at the present time. For details on contributions to code and discussions, please see our repository: https://github.com/Rust-for-Linux/linux However, we would like to give credit to everyone that has contributed in one way or another to the Rust for Linux project. Since the previous cover letter: - Nick Desaulniers, Masahiro Yamada and Greg Kroah-Hartman for their reviews & feedback on the previous round. - Maciej Falkowski for adding the initial common clock framework abstractions and the `{read,write}*_relaxed` methods to `IoMem`. - Daniel Xu for improving the docs and `File`. - Mauro Baladés for improving the CI. - SeongJae Park for the `rust-next` patch to fix the `-mm` tree. - Hsiang-Cheng Yang for fixing a typo. - bjorn3 and Gary Guo for all the input on Rust compiler details and all the reviews and suggestions. - Josh Triplett for pushing `-Zsymbol-mangling-version=v0` to the finish line. - Philip Herrons (and his supporters Open Source Security and Embecosm) et. al. for their ongoing work on GCC Rust. - Antoni Boucher (and his supporters) et. al. for their ongoing work on `rustc_codegen_gcc`. - Mats Larsen, Marc Poulhiès et. al. for their ongoing work on improving Rust support in Compiler Explorer. - Many folks that have reported issues, tested the project, helped spread the word, joined discussions and contributed in other ways! Please see also the acknowledgements on the previous cover letters. Boqun Feng (1): kallsyms: use the correct buffer size for symbols Gary Guo (2): rust: add `build_error` crate vsprintf: add new `%pA` format specifier Miguel Ojeda (13): kallsyms: support "big" kernel symbols kallsyms: increase maximum kernel symbol length to 512 rust: add C helpers rust: add `compiler_builtins` crate rust: add `alloc` crate rust: add `macros` crate rust: export generated symbols scripts: add `generate_rust_analyzer.py` scripts: decode_stacktrace: demangle Rust symbols docs: add Rust documentation Kbuild: add Rust support samples: add Rust examples MAINTAINERS: Rust Wedson Almeida Filho (3): rust: add `kernel` crate [RFC] drivers: gpio: PrimeCell PL061 in Rust [RFC] drivers: android: Binder IPC in Rust .gitignore | 5 + .rustfmt.toml | 12 + Documentation/doc-guide/kernel-doc.rst | 3 + Documentation/index.rst | 1 + Documentation/kbuild/kbuild.rst | 4 + Documentation/process/changes.rst | 42 + Documentation/rust/arch-support.rst | 35 + 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drivers/android/rust_binder.rs | 114 + drivers/android/thread.rs | 871 +++++ drivers/android/transaction.rs | 326 ++ drivers/gpio/Kconfig | 8 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio_pl061_rust.rs | 362 ++ include/linux/kallsyms.h | 2 +- include/linux/spinlock.h | 17 +- include/uapi/linux/android/binder.h | 28 +- init/Kconfig | 44 +- kernel/kallsyms.c | 26 +- kernel/livepatch/core.c | 4 +- kernel/printk/printk.c | 5 +- lib/Kconfig.debug | 144 + lib/rust.h | 14 + lib/vsprintf.c | 7 + rust/.gitignore | 7 + rust/Makefile | 352 ++ rust/alloc/README.md | 32 + rust/alloc/alloc.rs | 427 +++ rust/alloc/borrow.rs | 498 +++ rust/alloc/boxed.rs | 1847 ++++++++++ rust/alloc/collections/mod.rs | 156 + rust/alloc/fmt.rs | 601 ++++ rust/alloc/lib.rs | 217 ++ rust/alloc/macros.rs | 126 + rust/alloc/raw_vec.rs | 549 +++ rust/alloc/slice.rs | 1279 +++++++ rust/alloc/str.rs | 624 ++++ rust/alloc/string.rs | 2864 +++++++++++++++ rust/alloc/vec/drain.rs | 159 + rust/alloc/vec/drain_filter.rs | 145 + rust/alloc/vec/into_iter.rs | 356 ++ rust/alloc/vec/is_zero.rs | 106 + rust/alloc/vec/mod.rs | 3359 ++++++++++++++++++ rust/alloc/vec/partial_eq.rs | 49 + rust/alloc/vec/set_len_on_drop.rs | 30 + rust/alloc/vec/spec_extend.rs | 172 + rust/bindgen_parameters | 13 + rust/build_error.rs | 29 + rust/compiler_builtins.rs | 57 + rust/exports.c | 16 + rust/helpers.c | 508 +++ rust/kernel/allocator.rs | 65 + rust/kernel/amba.rs | 259 ++ rust/kernel/bindings.rs | 47 + rust/kernel/bindings_helper.h | 31 + rust/kernel/buffer.rs | 52 + rust/kernel/build_assert.rs | 80 + rust/kernel/c_types.rs | 119 + rust/kernel/chrdev.rs | 209 ++ rust/kernel/clk.rs | 75 + rust/kernel/cred.rs | 73 + rust/kernel/device.rs | 549 +++ rust/kernel/driver.rs | 440 +++ rust/kernel/error.rs | 542 +++ rust/kernel/file.rs | 147 + rust/kernel/file_operations.rs | 726 ++++ rust/kernel/gpio.rs | 477 +++ rust/kernel/io_buffer.rs | 153 + rust/kernel/io_mem.rs | 227 ++ rust/kernel/iov_iter.rs | 81 + rust/kernel/irq.rs | 409 +++ rust/kernel/lib.rs | 262 ++ rust/kernel/linked_list.rs | 247 ++ rust/kernel/miscdev.rs | 196 + rust/kernel/module_param.rs | 497 +++ rust/kernel/of.rs | 63 + rust/kernel/pages.rs | 162 + rust/kernel/platform.rs | 224 ++ rust/kernel/power.rs | 118 + rust/kernel/prelude.rs | 36 + rust/kernel/print.rs | 441 +++ rust/kernel/random.rs | 50 + rust/kernel/raw_list.rs | 361 ++ rust/kernel/rbtree.rs | 562 +++ rust/kernel/revocable.rs | 163 + rust/kernel/security.rs | 36 + rust/kernel/static_assert.rs | 39 + rust/kernel/std_vendor.rs | 150 + rust/kernel/str.rs | 375 ++ rust/kernel/sync/arc.rs | 500 +++ rust/kernel/sync/condvar.rs | 138 + rust/kernel/sync/guard.rs | 181 + rust/kernel/sync/locked_by.rs | 112 + rust/kernel/sync/mod.rs | 92 + rust/kernel/sync/mutex.rs | 112 + rust/kernel/sync/revocable_mutex.rs | 184 + rust/kernel/sync/seqlock.rs | 202 ++ rust/kernel/sync/spinlock.rs | 180 + rust/kernel/sysctl.rs | 197 + rust/kernel/task.rs | 182 + rust/kernel/types.rs | 486 +++ rust/kernel/user_ptr.rs | 175 + rust/macros/helpers.rs | 79 + rust/macros/lib.rs | 94 + rust/macros/module.rs | 622 ++++ samples/Kconfig | 2 + samples/Makefile | 1 + samples/rust/Kconfig | 123 + samples/rust/Makefile | 13 + samples/rust/rust_chrdev.rs | 53 + samples/rust/rust_minimal.rs | 38 + samples/rust/rust_miscdev.rs | 147 + samples/rust/rust_module_parameters.rs | 72 + samples/rust/rust_platform.rs | 25 + samples/rust/rust_print.rs | 57 + samples/rust/rust_random.rs | 64 + samples/rust/rust_semaphore.rs | 175 + samples/rust/rust_semaphore_c.c | 212 ++ samples/rust/rust_stack_probing.rs | 40 + samples/rust/rust_sync.rs | 81 + scripts/Kconfig.include | 6 +- scripts/Makefile.build | 22 + scripts/Makefile.debug | 10 + scripts/Makefile.lib | 12 + scripts/Makefile.modfinal | 8 +- scripts/cc-version.sh | 12 +- scripts/decode_stacktrace.sh | 14 + scripts/generate_rust_analyzer.py | 133 + scripts/is_rust_module.sh | 19 + scripts/kallsyms.c | 40 +- scripts/kconfig/confdata.c | 75 + scripts/min-tool-version.sh | 6 + scripts/rust-is-available-bindgen-libclang.h | 2 + scripts/rust-is-available.sh | 159 + tools/include/linux/kallsyms.h | 2 +- tools/lib/perf/include/perf/event.h | 2 +- tools/lib/symbol/kallsyms.h | 2 +- 162 files changed, 33506 insertions(+), 58 deletions(-) create mode 100644 .rustfmt.toml create mode 100644 Documentation/rust/arch-support.rst create mode 100644 Documentation/rust/assets/favicon-16x16.png create mode 100644 Documentation/rust/assets/favicon-32x32.png create mode 100644 Documentation/rust/assets/rust-logo.png create mode 100644 Documentation/rust/coding-guidelines.rst create mode 100644 Documentation/rust/general-information.rst create mode 100644 Documentation/rust/index.rst create mode 100644 Documentation/rust/quick-start.rst create mode 100644 arch/arm/rust/target.json create mode 100644 arch/arm64/rust/target.json create mode 100644 arch/powerpc/rust/target.json create mode 100644 arch/riscv/rust/rv32ima.json create mode 100644 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100644 rust/alloc/lib.rs create mode 100644 rust/alloc/macros.rs create mode 100644 rust/alloc/raw_vec.rs create mode 100644 rust/alloc/slice.rs create mode 100644 rust/alloc/str.rs create mode 100644 rust/alloc/string.rs create mode 100644 rust/alloc/vec/drain.rs create mode 100644 rust/alloc/vec/drain_filter.rs create mode 100644 rust/alloc/vec/into_iter.rs create mode 100644 rust/alloc/vec/is_zero.rs create mode 100644 rust/alloc/vec/mod.rs create mode 100644 rust/alloc/vec/partial_eq.rs create mode 100644 rust/alloc/vec/set_len_on_drop.rs create mode 100644 rust/alloc/vec/spec_extend.rs create mode 100644 rust/bindgen_parameters create mode 100644 rust/build_error.rs create mode 100644 rust/compiler_builtins.rs create mode 100644 rust/exports.c create mode 100644 rust/helpers.c create mode 100644 rust/kernel/allocator.rs create mode 100644 rust/kernel/amba.rs create mode 100644 rust/kernel/bindings.rs create mode 100644 rust/kernel/bindings_helper.h create mode 100644 rust/kernel/buffer.rs create mode 100644 rust/kernel/build_assert.rs create mode 100644 rust/kernel/c_types.rs create mode 100644 rust/kernel/chrdev.rs create mode 100644 rust/kernel/clk.rs create mode 100644 rust/kernel/cred.rs create mode 100644 rust/kernel/device.rs create mode 100644 rust/kernel/driver.rs create mode 100644 rust/kernel/error.rs create mode 100644 rust/kernel/file.rs create mode 100644 rust/kernel/file_operations.rs create mode 100644 rust/kernel/gpio.rs create mode 100644 rust/kernel/io_buffer.rs create mode 100644 rust/kernel/io_mem.rs create mode 100644 rust/kernel/iov_iter.rs create mode 100644 rust/kernel/irq.rs create mode 100644 rust/kernel/lib.rs create mode 100644 rust/kernel/linked_list.rs create mode 100644 rust/kernel/miscdev.rs create mode 100644 rust/kernel/module_param.rs create mode 100644 rust/kernel/of.rs create mode 100644 rust/kernel/pages.rs create mode 100644 rust/kernel/platform.rs create mode 100644 rust/kernel/power.rs create mode 100644 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mode 100644 rust/macros/helpers.rs create mode 100644 rust/macros/lib.rs create mode 100644 rust/macros/module.rs create mode 100644 samples/rust/Kconfig create mode 100644 samples/rust/Makefile create mode 100644 samples/rust/rust_chrdev.rs create mode 100644 samples/rust/rust_minimal.rs create mode 100644 samples/rust/rust_miscdev.rs create mode 100644 samples/rust/rust_module_parameters.rs create mode 100644 samples/rust/rust_platform.rs create mode 100644 samples/rust/rust_print.rs create mode 100644 samples/rust/rust_random.rs create mode 100644 samples/rust/rust_semaphore.rs create mode 100644 samples/rust/rust_semaphore_c.c create mode 100644 samples/rust/rust_stack_probing.rs create mode 100644 samples/rust/rust_sync.rs create mode 100755 scripts/generate_rust_analyzer.py create mode 100755 scripts/is_rust_module.sh create mode 100644 scripts/rust-is-available-bindgen-libclang.h create mode 100755 scripts/rust-is-available.sh -- 2.34.1