[coreboot-gerrit] Change in coreboot[master]: cbfs: Remove deprecated APIs

[Werner Zeh (Code Review)]

Attention is currently required from: Christian Walter, Julius Werner, Yu-Ping Wu.
Werner Zeh has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59682 )

Change subject: cbfs: Remove deprecated APIs
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Patch Set 3:

(1 comment)

Patchset:

PS2:
> > Loading a payload should probably not take over two seconds, unless it is ridiculously huge... […]

With a bit of digging it turned out that on Elkhart Lake FSPS somehow disables BIOS flash caching (coreboot adds the MTRR quite early in bootblock and it remains set up until a late FSPS-call, then it is overwritten by something different with no more spare MTRRs to add the BIOS-range back in). I have no clue why and where exactly but this explains pretty much the long time I face when the payload is loaded.
I gave this patch a try on Apollo Lake (mc_apl6) and it looks good there. So I guess this patch is fine and I need to find the caching issue on Elkhart Lake.