linux-kernel - Re: [PATCH v5 5/7] rust: io: add `register!` macro

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Message-Id: <DG841AYDNK08.SKE8W6746GRZ@kernel.org>
Date: Fri, 06 Feb 2026 20:02:31 +0100
From: "Danilo Krummrich" <dakr@...nel.org>
To: "Alexandre Courbot" <acourbot@...dia.com>
Cc: "Alice Ryhl" <aliceryhl@...gle.com>, "Daniel Almeida"
 <daniel.almeida@...labora.com>, "Miguel Ojeda" <ojeda@...nel.org>, "Boqun
 Feng" <boqun.feng@...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>, "Trevor
 Gross" <tmgross@...ch.edu>, "Yury Norov" <yury.norov@...il.com>, "John
 Hubbard" <jhubbard@...dia.com>, "Alistair Popple" <apopple@...dia.com>,
 "Joel Fernandes" <joelagnelf@...dia.com>, "Timur Tabi" <ttabi@...dia.com>,
 "Edwin Peer" <epeer@...dia.com>, "Eliot Courtney" <ecourtney@...dia.com>,
 "Dirk Behme" <dirk.behme@...bosch.com>, "Steven Price"
 <steven.price@....com>, <rust-for-linux@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 5/7] rust: io: add `register!` macro

On Thu Jan 29, 2026 at 2:32 PM CET, Alexandre Courbot wrote:
> Add a macro for defining hardware register types with I/O accessors.
>
> Each register field is represented as a `Bounded` of the appropriate bit
> width, ensuring field values are never silently truncated.
>
> Fields can optionally be converted to/from custom types, either fallibly
> or infallibly.
>
> The address of registers can be direct, relative, or indexed, supporting
> most of the patterns in which registers are arranged.
>
> Tested-by: Dirk Behme <dirk.behme@...bosch.com>
> Signed-off-by: Alexandre Courbot <acourbot@...dia.com>

Suggested-by: Danilo Krummrich <dakr@...nel.org>
Link: https://docs.kernel.org/gpu/nova/core/todo.html#generic-register-abstraction-rega

I assume you will remove this task once we land your nova-core patch that uses
the register!() macro, so maybe this link makes more sense:

Link: https://lore.kernel.org/all/20250306222336.23482-6-dakr@kernel.org/