Attention is currently required from: Christian Walter, Julius Werner, Yu-Ping Wu.

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• Patchset:

  • Patch Set #2:

    > 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.

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