Re: [PATCH v3 2/2] gpu: nova-core: add boot42 support for next-gen GPUs

[Timur Tabi]

On Wed, 2025-10-29 at 22:30 -0700, John Hubbard wrote:
> However, I don't want anyone to have to risk reading boot42 on some
> ancient GPU (earlier than Fermi, even), with uncertain results.
> 
> And our HW team has promised to leave behind arch0==0, arch1==1 in
> in boot0, more or less forever, specifically to help us out here.
> 
> With that in mind, I *do* want to read boot0 for the forseeable future,
> as a guide to whether to look at boot42. I really think that is the
> way to thread the needle here.

Sure, and this is exactly what is_ancient_gpu() does.  It tells you whether to use boot42
instead of boot0.  It is the only function that looks at boot0.