linux-kernel - [RFC v10 00/14] Refcounted interrupts, SpinLockIrq for rust

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Message-ID: <20250527203355.551287-1-lyude@redhat.com>
Date: Tue, 27 May 2025 16:26:45 -0400
From: Lyude Paul <lyude@...hat.com>
To: rust-for-linux@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Boqun Feng <boqun.feng@...il.com>,
	linux-kernel@...r.kernel.org,
	Daniel Almeida <daniel.almeida@...labora.com>
Cc: Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <lossin@...nel.org>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Trevor Gross <tmgross@...ch.edu>,
	Danilo Krummrich <dakr@...nel.org>
Subject: [RFC v10 00/14] Refcounted interrupts, SpinLockIrq for rust

Hi! While this patch series still needs some changes on the C side, I
wanted to update things and send out the latest version of it that's
been sitting on my machine for a while now. This adds back the
mistakenly missing commit messages along with a number of other changes
that were requested.

Please keep in mind, there are still some issues with this patch series
that I do need help with solving before it can move forward:

* https://lore.kernel.org/rust-for-linux/ZxrCrlg1XvaTtJ1I@boqun-archlinux/
* Concerns around double checking the HARDIRQ bits against all
  architectures that have interrupt priority support. I know what IPL is
  but I really don't have a clear understanding of how this actually
  fits together in the kernel's codebase or even how to find the
  documentation for many of the architectures involved here.

  Please help :C! If you want these rust bindings, figuring out these
  two issues will let this patch seires move forward.

The previous version of this patch series can be found here:

https://lore.kernel.org/rust-for-linux/20250227221924.265259-4-lyude@redhat.com/T/

Boqun Feng (6):
  preempt: Introduce HARDIRQ_DISABLE_BITS
  preempt: Introduce __preempt_count_{sub, add}_return()
  irq & spin_lock: Add counted interrupt disabling/enabling
  rust: helper: Add spin_{un,}lock_irq_{enable,disable}() helpers
  rust: sync: lock: Add `Backend::BackendInContext`
  locking: Switch to _irq_{disable,enable}() variants in cleanup guards

Lyude Paul (8):
  rust: Introduce interrupt module
  rust: sync: Add SpinLockIrq
  rust: sync: Introduce lock::Backend::Context
  rust: sync: Add a lifetime parameter to lock::global::GlobalGuard
  rust: sync: lock/global: Rename B to G in trait bounds
  rust: sync: Expose lock::Backend
  rust: sync: lock/global: Add Backend parameter to GlobalGuard
  rust: sync: lock/global: Add BackendInContext support to GlobalLock

 arch/arm64/include/asm/preempt.h  |  18 +++
 arch/s390/include/asm/preempt.h   |  19 +++
 arch/x86/include/asm/preempt.h    |  10 ++
 include/asm-generic/preempt.h     |  14 +++
 include/linux/irqflags.h          |   1 -
 include/linux/irqflags_types.h    |   6 +
 include/linux/preempt.h           |  20 +++-
 include/linux/spinlock.h          |  88 +++++++++++---
 include/linux/spinlock_api_smp.h  |  27 +++++
 include/linux/spinlock_api_up.h   |   8 ++
 include/linux/spinlock_rt.h       |  16 +++
 kernel/locking/spinlock.c         |  31 +++++
 kernel/softirq.c                  |   3 +
 rust/helpers/helpers.c            |   1 +
 rust/helpers/interrupt.c          |  18 +++
 rust/helpers/spinlock.c           |  15 +++
 rust/kernel/interrupt.rs          |  83 +++++++++++++
 rust/kernel/lib.rs                |   1 +
 rust/kernel/sync.rs               |   5 +-
 rust/kernel/sync/lock.rs          |  69 ++++++++++-
 rust/kernel/sync/lock/global.rs   |  91 ++++++++++-----
 rust/kernel/sync/lock/mutex.rs    |   2 +
 rust/kernel/sync/lock/spinlock.rs | 186 ++++++++++++++++++++++++++++++
 23 files changed, 680 insertions(+), 52 deletions(-)
 create mode 100644 rust/helpers/interrupt.c
 create mode 100644 rust/kernel/interrupt.rs


base-commit: a3b2347343e077e81d3c169f32c9b2cb1364f4cc
-- 
2.49.0