linux-kernel - Re: gpu: nova-core: arm32 build errors

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Message-ID: <76064a67-206d-411e-87b0-651c338cf204@kernel.org>
Date: Thu, 28 Aug 2025 23:54:01 +0200
From: Danilo Krummrich <dakr@...nel.org>
To: John Hubbard <jhubbard@...dia.com>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
 Miguel Ojeda <ojeda@...nel.org>, Alexandre Courbot <acourbot@...dia.com>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 nouveau@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
 rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: gpu: nova-core: arm32 build errors

On 8/28/25 11:45 PM, John Hubbard wrote:
> So Nova should definitely depend upon 64-bit configs.

Yeah, I fully agree.

But I think it would have been good to have a consumer for the generic APIs that
has to deal with it, which I think was also Miguel's point.

I will send a patch for Nova to depend on 64-bit. Independent of that, I think
the code requires a few cleanups (e.g. avoiding `as` casts or using the DMA
type).

I will also further look into how we can help other drivers from the perspective
of the DMA layer to deal with this, e.g. in the context of a DmaRage type, etc.

- Danilo