Re: [PATCH v10 03/28] gpu: nova-core: Hopper/Blackwell: basic GPU identification

John Hubbard
2026-04-13T21:08:16Z

On 4/10/26 8:58 PM, Timur Tabi wrote:
> On Fri, 2026-04-10 at 19:49 -0700, John Hubbard wrote:
>> +        | Architecture::BlackwellGB10x
>> +        | Architecture::BlackwellGB20x => {
>
> Can you add something to the patch description that explains why Blackwell, unlike all of the
> olther architectures, is represented by two Architecture enums?

How's this:

Blackwell uses two Architecture variants because the hardware itself
exposes two distinct architecture IDs in NV_PMC_BOOT_0: 0x1A for
GB10x (GB100, GB102) and 0x1B for GB20x (GB202, GB203, GB205, GB206,
GB207). Open RM maps these into separate chip families with distinct
HAL routing and different firmware signature sections.

thanks,
--
John Hubbard