From: Joel Fernandes <joelagnelf@nvidia.com>
To: Danilo Krummrich <dakr@kernel.org>
Cc: Alexandre Courbot <acourbot@nvidia.com>,
Yury Norov <yury.norov@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"rust-for-linux@vger.kernel.org" <rust-for-linux@vger.kernel.org>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
Alistair Popple <apopple@nvidia.com>,
Miguel Ojeda <ojeda@kernel.org>,
Alex Gaynor <alex.gaynor@gmail.com>,
Boqun Feng <boqun.feng@gmail.com>, Gary Guo <gary@garyguo.net>,
"bjorn3_gh@protonmail.com" <bjorn3_gh@protonmail.com>,
Benno Lossin <lossin@kernel.org>,
Andreas Hindborg <a.hindborg@kernel.org>,
Alice Ryhl <aliceryhl@google.com>,
Trevor Gross <tmgross@umich.edu>,
David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
John Hubbard <jhubbard@nvidia.com>, Timur Tabi <ttabi@nvidia.com>,
"joel@joelfernandes.org" <joel@joelfernandes.org>,
Elle Rhumsaa <elle@weathered-steel.dev>,
Daniel Almeida <daniel.almeida@collabora.com>,
Andrea Righi <arighi@nvidia.com>,
"nouveau@lists.freedesktop.org" <nouveau@lists.freedesktop.org>
Subject: Re: [PATCH v6 0/5] Introduce bitfield and move register macro to rust/kernel/
Date: Wed, 8 Oct 2025 20:24:20 -0400 [thread overview]
Message-ID: <22e8c33c-b444-4f58-b7ec-6374475e05be@nvidia.com> (raw)
In-Reply-To: <DDCV84IJHUML.126CB1CT0XMX5@kernel.org>
On 10/8/2025 6:23 AM, 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?
You are referring to old GPUs. NV_PMC_BOOT_1 does not have endianness switch for
Turing and later.
>> All the CPU architectures our drivers support are expected to be little-endian.
>
> Technically, all Rust supported architectures are indeed little-endian.
>
Ok.
> However, the only constraint for the Nova project as by now is 64-bit only.
Ok.
Modern Nvidia GPUs only boot on x86 and ARM CPUs. There is BIOS/UEFI support
also that is needed for specific CPU architectures.
If we want to add a Kconfig patch enabling Nova only on x86/ARM, that'll be Ok
with me.
hope this helps, thanks,
- Joel
next prev parent reply other threads:[~2025-10-09 0:24 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-07 23:37 Joel Fernandes
2025-10-08 10:23 ` Danilo Krummrich
2025-10-08 10:47 ` Greg KH
2025-10-08 10:49 ` Danilo Krummrich
2025-10-09 0:24 ` Joel Fernandes [this message]
2025-10-09 13:02 ` Danilo Krummrich
-- strict thread matches above, loose matches on Subject: below --
2025-10-08 19:56 Joel Fernandes
2025-10-03 15:47 Joel Fernandes
2025-10-06 18:05 ` Edwin Peer
2025-10-06 22:29 ` Yury Norov
2025-10-07 10:36 ` Alexandre Courbot
2025-10-07 10:42 ` Miguel Ojeda
2025-10-07 13:20 ` Alexandre Courbot
2025-10-07 16:06 ` Yury Norov
2025-10-07 16:12 ` Miguel Ojeda
2025-10-07 13:16 ` Danilo Krummrich
2025-10-07 21:08 ` Joel Fernandes
2025-10-07 22:08 ` Danilo Krummrich
2025-10-08 14:28 ` Yury Norov
2025-10-08 15:00 ` Danilo Krummrich
2025-10-07 15:41 ` Yury Norov
2025-10-07 21:41 ` Daniel Almeida
2025-10-08 15:49 ` Yury Norov
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