linux-kernel - [PATCH WIP 0/5] qcom-socinfo Rust Implementation

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Message-ID: <20250819-qcom-socinfo-v1-0-e8d32cc81270@google.com>
Date: Tue, 19 Aug 2025 23:12:31 +0000
From: Matthew Maurer <mmaurer@...gle.com>
To: Miguel Ojeda <ojeda@...nel.org>, 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>, Sami Tolvanen <samitolvanen@...gle.com>, 
	Timur Tabi <ttabi@...dia.com>, Benno Lossin <lossin@...nel.org>, 
	Dirk Beheme <dirk.behme@...bosch.com>
Cc: linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org, 
	Matthew Maurer <mmaurer@...gle.com>
Subject: [PATCH WIP 0/5] qcom-socinfo Rust Implementation

THIS IS NOT A PROPOSAL TO LAND THIS SERIES

This is a demonstration of implementing a real driver that uses DebugFS,
primarily uploaded to serve as an example for API discussions on the
DebugFS series [1].

There are a number of rough edges (transmute, intra-module bindings) and
un-landed abstractions (SoC registration, randomness), but the main
purpose of this series is to look at sample usage of DebugFS in

* driver/soc/qcom/socinfo_rust/socinfo_rust_scoped.rs
* driver/soc/qcom/socinfo_rust/socinfo_rust_file.rs

to show how this would look in the two different APIs.

The example outputs byte-identical (as checked by recursive diff on
debugfs mounts) DebugFS files to the existing C driver. A real rewrite
would likely be simpler as it would be willing to not precisely mimic
newline quirks, etc.

[1] https://lore.kernel.org/all/20250819-debugfs-rust-v10-0-86e20f3cf3bb@google.com/

Signed-off-by: Matthew Maurer <mmaurer@...gle.com>
---
Matthew Maurer (5):
      rust: Add soc_device support
      rust: transmute: Cleanup + Fixes
      rust: Add support for feeding entropy to randomness pool
      soc: qcom: socinfo: `File`-based example
      soc: qcom: socinfo: `Scoped`-based example

 MAINTAINERS                                        |   1 +
 drivers/soc/qcom/Kconfig                           |  12 +
 drivers/soc/qcom/Makefile                          |   2 +
 drivers/soc/qcom/smem.c                            |   9 +
 drivers/soc/qcom/socinfo_rust/bindings.rs          | 126 +++++
 drivers/soc/qcom/socinfo_rust/data.rs              | 387 +++++++++++++++
 drivers/soc/qcom/socinfo_rust/socinfo_rust_file.rs | 538 +++++++++++++++++++++
 .../soc/qcom/socinfo_rust/socinfo_rust_scoped.rs   | 367 ++++++++++++++
 rust/bindings/bindings_helper.h                    |   8 +
 rust/kernel/lib.rs                                 |   4 +
 rust/kernel/rand.rs                                |  14 +
 rust/kernel/soc.rs                                 | 137 ++++++
 rust/kernel/transmute.rs                           | 126 +++--
 13 files changed, 1681 insertions(+), 50 deletions(-)
---
base-commit: f3c5631f70e434e318c44001e2417d4770f06cd0
change-id: 20250818-qcom-socinfo-c58407a81ac6
prerequisite-message-id: <20250811213851.65644-1-christiansantoslima21@...il.com>
prerequisite-patch-id: 9448855f52cb137ad246ae5fde9eab12eac5da94
prerequisite-change-id: 20250428-debugfs-rust-3cd5c97eb7d1:v10
prerequisite-patch-id: 78c729bc8c164ce7a7c3ff841e720518a7f28c54
prerequisite-patch-id: ca7c06b342af0d1f5b03f8907206f8b69a189c9b
prerequisite-patch-id: f3e7541c4e907d874c8f303c2da14dd3aafe05f6
prerequisite-patch-id: e892f83de14710bea11f042ed874c05ccb3bc972
prerequisite-patch-id: ce8a5988c32a6491bc36e87fb33b2e9adf254db8
prerequisite-patch-id: 0762df7763820dd608da15dfbd8b5309d7692aa9
prerequisite-patch-id: 23da818045894ee8c6f2a7d8ade002ccfc96cc3a
prerequisite-patch-id: 2bfdaa7c29838c44d80003c623067051617f2b5e

Best regards,
-- 
Matthew Maurer <mmaurer@...gle.com>