linux-kernel - Re: [PATCH v6 0/5] Introduce bitfield and move register macro to rust/kernel/

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Message-Id: <DDCV84IJHUML.126CB1CT0XMX5@kernel.org>
Date: Wed, 08 Oct 2025 12:23:40 +0200
From: "Danilo Krummrich" <dakr@...nel.org>
To: "Joel Fernandes" <joelagnelf@...dia.com>
Cc: "Alexandre Courbot" <acourbot@...dia.com>, "Yury Norov"
 <yury.norov@...il.com>, "linux-kernel@...r.kernel.org"
 <linux-kernel@...r.kernel.org>, "rust-for-linux@...r.kernel.org"
 <rust-for-linux@...r.kernel.org>, "dri-devel@...ts.freedesktop.org"
 <dri-devel@...ts.freedesktop.org>, "Alistair Popple" <apopple@...dia.com>,
 "Miguel Ojeda" <ojeda@...nel.org>, "Alex Gaynor" <alex.gaynor@...il.com>,
 "Boqun Feng" <boqun.feng@...il.com>, "Gary Guo" <gary@...yguo.net>,
 "bjorn3_gh@...tonmail.com" <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>, "David
 Airlie" <airlied@...il.com>, "Simona Vetter" <simona@...ll.ch>, "Maarten
 Lankhorst" <maarten.lankhorst@...ux.intel.com>, "Maxime Ripard"
 <mripard@...nel.org>, "Thomas Zimmermann" <tzimmermann@...e.de>, "John
 Hubbard" <jhubbard@...dia.com>, "Timur Tabi" <ttabi@...dia.com>,
 "joel@...lfernandes.org" <joel@...lfernandes.org>, "Elle Rhumsaa"
 <elle@...thered-steel.dev>, "Daniel Almeida"
 <daniel.almeida@...labora.com>, "Andrea Righi" <arighi@...dia.com>,
 "nouveau@...ts.freedesktop.org" <nouveau@...ts.freedesktop.org>
Subject: Re: [PATCH v6 0/5] Introduce bitfield and move register macro to
 rust/kernel/

On Wed Oct 8, 2025 at 1:37 AM CEST, Joel Fernandes wrote:
> The Nvidia GPU architecture is little-endian (including MMU structures in VRAM).

Yes, I'm aware (and I'd assume that there is no reason to ever change that).

Just for the complete picture, there's also some endianness switch in the
NV_PMC_BOOT_1 register I think?

> All the CPU architectures our drivers support are expected to be little-endian.

Technically, all Rust supported architectures are indeed little-endian.

However, the only constraint for the Nova project as by now is 64-bit only.