[coreboot-gerrit] Change in coreboot[master]: src/Kconfig: increase heap size if using flattened image tree

[Aaron Durbin (Code Review)]

Aaron Durbin has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/32392 )

Change subject: src/Kconfig: increase heap size if using flattened image tree
......................................................................

Patch Set 3:
> Patch Set 3:
> > So it sounds like we need a way to tie in the Kconfig to this allocation (if possible). Have you looked into various options?
>
> In the old days of bounce buffers and non-relocatable ramstage on x86, it would have been fragile for payload to access back to ramstage program. If I read the source correctly, ramstage heap became part of the hand-of-buffer with FIT payloads. Do we really want to allow that?
>
> I think lib/device_tree.c and lib/fit_payload.c should malloc() from a completely separate heap.

I'm not up on the details of this sharing. Is the region just referenced or is it reused for its own malloc implementation?