RFC: Partition type GUID for U-Boot environment

[Rasmus Villemoes]

On 17/11/2020 19.27, Tom Rini wrote:
> On Tue, Nov 17, 2020 at 11:05:36AM +0100, Rasmus Villemoes wrote:
> 
>> Hi,
>>
>> Would it make sense to choose a canonical "Partition type GUID" [1] for
>> partitions used to store a U-Boot environment?
>>
>> The partition type is mostly informational, but I'm thinking it might
>> make sense to have some canonical thing to put into an image definition
>> rather than having the tool use something random or a default which
>> would often be "Linux filesystem data".
>>
>> If so, I propose 3de21764-95bd-54bd-a5c3-4abe786f38a8 , which is from
>> https://www.uuidtools.com/v5 with a namespace of
>> 25cbcde0-8642-47c6-a298-1a3a57cd256b (randomly generated just now, but
>> should be used for future v5 uuids within U-Boot context [2]) and name
>> "U-Boot environment" (sans quotes).
>>
>>
>> [1] https://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs
>> [2]
>> https://en.wikipedia.org/wiki/Universally_unique_identifier#Versions_3_and_5_(namespace_name-based)
> 
> Sure.  Do we need to, well, register that GUID with anyone so that other
> tools will see and pick it up and print something nice?

I don't think so - there's no central authority for these. It seems that
the GUID for "Linux filesystem data" was decided by someone proposing it
on appropriate mailing lists. So I think just adding it to
doc/README.gpt and hooking it up in lib/uuid.c should be enough. I'll
send a patch.

Rasmus