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

[Joel Fernandes]

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