Rust support
This is the patch series (v4) 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@xxxxxxxxxxxxxxx
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@xxxxxxxxxx/
v1: https://lore.kernel.org/lkml/20210704202756.29107-1-ojeda@xxxxxxxxxx/
v2: https://lore.kernel.org/lkml/20211206140313.5653-1-ojeda@xxxxxxxxxx/
v3: https://lore.kernel.org/lkml/20220117053349.6804-1-ojeda@xxxxxxxxxx/
## Infrastructure updates
There have been several improvements to the overall Rust support:
- The Intel 0DAY/LKP kernel test robot is setting up Rust in their
CI -- we already got the first reports from the bot which we
could act upon, very useful!
- KernelCI is also looking forward to enabling Rust in their runs.
- The GitHub CI we use for quick pre-merge testing has been moved
to use containers.
- Kernel modules do not need to write the crate attributes
`#![no_std]` and `#![feature(...)]` anymore, removing boilerplate.
- Added single target support, including `.o`, `.s`, `.ll` and `.i`
(i.e. macro expanded, similar to C preprocessed sources).
- Explanation of the `helpers.c` file and licensing for helpers
and exports.
- The documentation logo is now vector based (SVG). In addition,
a vector version of Tux has been proposed for upstream, and an
RFC for improved custom logo support has been submitted to
upstream Rust.
- Added coding guidelines on comments (`//`) and code documentation
(`///`).
- `is_rust_module.sh` rework.
- Generation of `.rmeta` for leaf modules is skipped now.
- Other cleanups, fixes and improvements.
## Abstractions and driver updates
Some of the improvements to the abstractions and example drivers are:
- Added support for static (global shared variables) synchronization
primitives. `CONFIG_CONSTRUCTORS` are used for the implementation.
- Simplification of the lock guards by using marker types, i.e.
`Guard` and `GuardMut` are unified into a single parametrized
type. If the marker is `WriteLock`, then `Guard` implements
`DerefMut` (only implemented by `GuardMut` previously).
- Optional parameters added to the registration of misc devices,
following the builder pattern., e.g.
miscdev::Options::new()
.mode(0o600)
.minor(10)
.parent(parent)
.register(reg, c_str!("sample"), ())
- Added `RwSemaphore` abstraction that wraps the C side
`struct rw_semaphore`.
- New `mm` module and VMA abstraction (wrapping the C side
`struct vm_area_struct`) for use with `mmap`.
- GPIO PL061 now uses the recently added `dev_*!` Rust macros.
- Support the `!CONFIG_PRINTK` case.
- Other cleanups, fixes and improvements.
## Patch series status
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`, as usual.
Similarly, the preview docs for this series can be seen at:
https://rust-for-linux.github.io/docs/kernel/
As usual, please see the following link for the
live list of unstable Rust features we are using:
https://github.com/Rust-for-Linux/linux/issues/2
## 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:
- Philip Li, Yujie Liu et. al. for setting the Intel 0DAY/LKP kernel
test robot with Rust support.
- Maciej Falkowski for continuing his work on the Hardware Random
Number Generator subsystem, Samsung Exynos true random number
generator, clock subsystem, etc.
- bjorn3 for an extensive re-review of the previous round.
- Jonathan Corbet for his feedback on the previous round.
- Garrett LeSage and IFo Hancroft for agreeing to the usage of
their vector version of Tux within the kernel tree with the same
license as the existing one from Larry Ewing.
- Nathan Chancellor for noticing a case where a C module was being
identified as a Rust one for purposes of skipping BTF generation
and suggesting a few improvements around `is_rust_module.sh`.
- Wei Liu for exporting the remaining helpers and triggering a
useful discussion around it.
- Miguel Cano for fixing an issue with compilers containing a full,
3-part version in the suffix part (e.g. Ubuntu Clang).
- Abhik Jain for working on adding missing `// SAFETY` comments and
`# Safety` sections to the code generated by the `module!` macro.
- Jiapeng Chong and the Abaci Robot for reporting and fixing
an unneeded header `#include`.
- Finn Behrens for resuming his work on building Rust for Linux
on Nix and spotting and fixing usability issues.
- As usual, Gary Guo and bjorn3 for all the input on Rust compiler
details and all the reviews and suggestions.
- John Ericson, TennyZhuang and Xuanwo for their ongoing work on
adding more fallible allocation methods (`try_*`) to the Rust
standard library.
- Stephan Sokolow and Mark Rousskov for their feedback on the
custom documentation logo RFC.
- 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 (4):
rust: add `kernel` crate's `sync` module
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 +
Documentation/rust/coding-guidelines.rst | 153 +
Documentation/rust/general-information.rst | 80 +
Documentation/rust/index.rst | 21 +
Documentation/rust/logo.svg | 357 ++
Documentation/rust/quick-start.rst | 231 ++
MAINTAINERS | 16 +
Makefile | 154 +-
arch/arm/rust/target.json | 27 +
arch/arm64/rust/target.json | 34 +
arch/powerpc/rust/target.json | 29 +
arch/riscv/Makefile | 1 +
arch/riscv/rust/rv32ima.json | 36 +
arch/riscv/rust/rv32imac.json | 36 +
arch/riscv/rust/rv64ima.json | 36 +
arch/riscv/rust/rv64imac.json | 36 +
arch/x86/rust/target.json | 36 +
drivers/android/Kconfig | 7 +
drivers/android/Makefile | 2 +
drivers/android/allocation.rs | 266 ++
drivers/android/context.rs | 80 +
drivers/android/defs.rs | 99 +
drivers/android/node.rs | 476 +++
drivers/android/process.rs | 961 +++++
drivers/android/range_alloc.rs | 189 +
drivers/android/rust_binder.rs | 111 +
drivers/android/thread.rs | 871 +++++
drivers/android/transaction.rs | 326 ++
drivers/gpio/Kconfig | 8 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio_pl061_rust.rs | 370 ++
include/linux/kallsyms.h | 2 +-
include/linux/spinlock.h | 17 +-
include/uapi/linux/android/binder.h | 28 +-
init/Kconfig | 45 +-
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 | 374 ++
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 | 19 +
rust/helpers.c | 529 +++
rust/kernel/allocator.rs | 65 +
rust/kernel/amba.rs | 259 ++
rust/kernel/bindings.rs | 47 +
rust/kernel/bindings_helper.h | 30 +
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 | 554 +++
rust/kernel/driver.rs | 440 +++
rust/kernel/error.rs | 542 +++
rust/kernel/file.rs | 147 +
rust/kernel/file_operations.rs | 734 ++++
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 | 261 ++
rust/kernel/linked_list.rs | 247 ++
rust/kernel/miscdev.rs | 281 ++
rust/kernel/mm.rs | 149 +
rust/kernel/module_param.rs | 497 +++
rust/kernel/of.rs | 63 +
rust/kernel/pages.rs | 144 +
rust/kernel/platform.rs | 224 ++
rust/kernel/power.rs | 118 +
rust/kernel/prelude.rs | 36 +
rust/kernel/print.rs | 417 +++
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 | 401 +++
rust/kernel/sync/arc.rs | 500 +++
rust/kernel/sync/condvar.rs | 138 +
rust/kernel/sync/guard.rs | 150 +
rust/kernel/sync/locked_by.rs | 112 +
rust/kernel/sync/mod.rs | 157 +
rust/kernel/sync/mutex.rs | 112 +
rust/kernel/sync/revocable_mutex.rs | 184 +
rust/kernel/sync/rwsem.rs | 147 +
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 | 631 ++++
samples/Kconfig | 2 +
samples/Makefile | 1 +
samples/rust/Kconfig | 123 +
samples/rust/Makefile | 13 +
samples/rust/rust_chrdev.rs | 50 +
samples/rust/rust_minimal.rs | 35 +
samples/rust/rust_miscdev.rs | 144 +
samples/rust/rust_module_parameters.rs | 69 +
samples/rust/rust_platform.rs | 22 +
samples/rust/rust_print.rs | 54 +
samples/rust/rust_random.rs | 61 +
samples/rust/rust_semaphore.rs | 172 +
samples/rust/rust_semaphore_c.c | 212 ++
samples/rust/rust_stack_probing.rs | 36 +
samples/rust/rust_sync.rs | 78 +
scripts/Kconfig.include | 6 +-
scripts/Makefile.build | 65 +
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 | 13 +
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 | 158 +
tools/include/linux/kallsyms.h | 2 +-
tools/lib/perf/include/perf/event.h | 2 +-
tools/lib/symbol/kallsyms.h | 2 +-
162 files changed, 34341 insertions(+), 57 deletions(-)
create mode 100644 .rustfmt.toml
create mode 100644 Documentation/rust/arch-support.rst
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/logo.svg
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 arch/riscv/rust/rv32imac.json
create mode 100644 arch/riscv/rust/rv64ima.json
create mode 100644 arch/riscv/rust/rv64imac.json
create mode 100644 arch/x86/rust/target.json
create mode 100644 drivers/android/allocation.rs
create mode 100644 drivers/android/context.rs
create mode 100644 drivers/android/defs.rs
create mode 100644 drivers/android/node.rs
create mode 100644 drivers/android/process.rs
create mode 100644 drivers/android/range_alloc.rs
create mode 100644 drivers/android/rust_binder.rs
create mode 100644 drivers/android/thread.rs
create mode 100644 drivers/android/transaction.rs
create mode 100644 drivers/gpio/gpio_pl061_rust.rs
create mode 100644 lib/rust.h
create mode 100644 rust/.gitignore
create mode 100644 rust/Makefile
create mode 100644 rust/alloc/README.md
create mode 100644 rust/alloc/alloc.rs
create mode 100644 rust/alloc/borrow.rs
create mode 100644 rust/alloc/boxed.rs
create mode 100644 rust/alloc/collections/mod.rs
create mode 100644 rust/alloc/fmt.rs
create mode 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/mm.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 rust/kernel/prelude.rs
create mode 100644 rust/kernel/print.rs
create mode 100644 rust/kernel/random.rs
create mode 100644 rust/kernel/raw_list.rs
create mode 100644 rust/kernel/rbtree.rs
create mode 100644 rust/kernel/revocable.rs
create mode 100644 rust/kernel/security.rs
create mode 100644 rust/kernel/static_assert.rs
create mode 100644 rust/kernel/std_vendor.rs
create mode 100644 rust/kernel/str.rs
create mode 100644 rust/kernel/sync/arc.rs
create mode 100644 rust/kernel/sync/condvar.rs
create mode 100644 rust/kernel/sync/guard.rs
create mode 100644 rust/kernel/sync/locked_by.rs
create mode 100644 rust/kernel/sync/mod.rs
create mode 100644 rust/kernel/sync/mutex.rs
create mode 100644 rust/kernel/sync/revocable_mutex.rs
create mode 100644 rust/kernel/sync/rwsem.rs
create mode 100644 rust/kernel/sync/seqlock.rs
create mode 100644 rust/kernel/sync/spinlock.rs
create mode 100644 rust/kernel/sysctl.rs
create mode 100644 rust/kernel/task.rs
create mode 100644 rust/kernel/types.rs
create mode 100644 rust/kernel/user_ptr.rs
create 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
base-commit: dfd42facf1e4ada021b939b4e19c935dcdd55566
--
2.35.1
