[coreboot] Re: Self-describing CBFS features - prefixed config and revision files

[Nico Huber]

Hello Jeremy,

On 05.06.20 16:28, Jeremy Jackson wrote:
> So far, after 3 people reviewing, there have been 2 identified users of
> the .config and "revision" files embedded in CFBS, which may be affected
> by adding the prefix fallback/normal/<custom>
>
> It was suggested to reach out via the mailing list, to see if anyone
> else would be affected by this change.

I think we should keep the original copies for two reasons:

1. Backwards compatibility.
2. Not everything in CBFS is fallback/normal specific.

For instance the bootblock is never overwritten with CONFIG_UPDATE_IMAGE
set. So it seems reasonable to keep the `config` and `revision` files
for the original build.

The logic could be as follows:

if !CONFIG_UPDATE_IMAGE
      store config
      store revision
  endif
  # and always
  store $prefix/config
  store $prefix/revision

Nico