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

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Message-ID: <2025100808-unpadded-unsubtle-1053@gregkh>
Date: Wed, 8 Oct 2025 12:47:06 +0200
From: Greg KH <greg@...ah.com>
To: Danilo Krummrich <dakr@...nel.org>
Cc: Joel Fernandes <joelagnelf@...dia.com>,
	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 08, 2025 at 12:23:40PM +0200, Danilo Krummrich wrote:
> 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.

s390x is supported by rust as a tier2 output:
	https://doc.rust-lang.org/beta/rustc/platform-support/s390x-unknown-linux-gnu.html

so there really shouldn't be any reason why that platform couldn't add
rust support today, right?

thanks,

greg k-h