linux-kernel - [PATCH v2 0/2] rust: Add abstractions for applying devicetree overlays

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250816-rust-overlay-abs-v2-0-48a2c8921df2@beagleboard.org>
Date: Sat, 16 Aug 2025 11:27:44 +0530
From: Ayush Singh <ayush@...gleboard.org>
To: Jason Kridner <jkridner@...gleboard.org>, 
 Deepak Khatri <lorforlinux@...gleboard.org>, 
 Robert Nelson <robertcnelson@...gleboard.org>, 
 Miguel Ojeda <ojeda@...nel.org>, Dhruva Gole <d-gole@...com>, 
 Alex Gaynor <alex.gaynor@...il.com>, Boqun Feng <boqun.feng@...il.com>, 
 Gary Guo <gary@...yguo.net>, 
 Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
 Andreas Hindborg <a.hindborg@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>, 
 Trevor Gross <tmgross@...ch.edu>, Danilo Krummrich <dakr@...nel.org>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, Rob Herring <robh@...nel.org>, 
 Saravana Kannan <saravanak@...gle.com>, Benno Lossin <lossin@...nel.org>, 
 Benno Lossin <lossin@...nel.org>
Cc: rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, Ayush Singh <ayush@...gleboard.org>
Subject: [PATCH v2 0/2] rust: Add abstractions for applying devicetree
 overlays

The following patch series adds abstractions required to apply
devicetree overlays from Rust code. To see how the bindings look in
usage, see my working tree [0] for a connector driver  I am working on.

Open Questions
***************

1. Removing overlay on drop

I my usecase (see [0]), I will only ever have 1 active overlay in the
driver, which I will be removing dynamically. So removing overlay on
drop works for it. But maybe there are some usecases I am missing.

2. Only enable bindings when CONFIG_OF_OVERLAY is set?

The kernel header currently seems to provide blank implementations of
these methods when `CONFIG_OF_OVERLAY` is not enabled. But I am not sure
what is rust-for-linux policy here.

Best Regards,
Ayush Singh

[0]: https://github.com/Ayush1325/linux/commits/beagle-cape-v2/

Changes in v2:
- Rebase on next-20250814
- Return error if buffer size too big instead of panic.
- Update the reference driver link.
- Use `to_of_node` on fwnode instead of getting of_node directly from
  struct device.
- Link to v1: https://lore.kernel.org/r/20250422-rust-overlay-abs-v1-0-85779c1b853d@beagleboard.org/

Signed-off-by: Ayush Singh <ayush@...gleboard.org>
---
Ayush Singh (2):
      rust: kernel: of: Add DeviceNode abstraction
      rust: kernel: of: Add overlay id abstraction

 rust/bindings/bindings_helper.h |  1 +
 rust/helpers/of.c               |  5 +++++
 rust/kernel/device/property.rs  | 18 ++++++++++++++++
 rust/kernel/of.rs               | 46 +++++++++++++++++++++++++++++++++++++++++
 4 files changed, 70 insertions(+)
---
base-commit: 931e46dcbc7e6035a90e9c4a27a84b660e083f0a
change-id: 20250417-rust-overlay-abs-36aac8b9752a

Best regards,
-- 
Ayush Singh <ayush@...gleboard.org>