[coreboot-gerrit] [S] Change in coreboot[main]: soc/intel/cmn/block/cse: Support sending EOP from payload

[Kapil Porwal (Code Review)]

Attention is currently required from: Julius Werner, Lean Sheng Tan, Paul Menzel, Subrata Banik, Werner Zeh.

Kapil Porwal has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74765?usp=email )

Change subject: soc/intel/cmn/block/cse: Support sending EOP from payload
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Patch Set 12:

(1 comment)

Patchset:

PS12:
> > I guess this is explainable due to the nature of how this feature works? […]

Currently I am not seeing the regression.

I investigated the below segment as well but I am not seeing any difference with/without this CL -
```
# cbmem -t
...
  60:device initialization                             959,184 (577)
  15:starting LZMA decompress (ignore for x86)         964,119 (4,934)
  16:finished LZMA decompress (ignore for x86)         964,220 (101)
 114:started elog init                                 979,189 (14,968)
 115:finished elog init                                982,740 (3,550)
...
```

```
# cbmem -c1 | grep -in "BS: BS_DEV_INIT "
2377:[DEBUG]  BS: BS_DEV_INIT run times (exec / console): 20 / 0 ms
2383:[DEBUG]  BS: BS_DEV_INIT exit times (exec / console): 4 / 0 ms
```
```
# cbmem -c1 | grep -in "init finished in" | grep -v "0 msecs"
2036:[DEBUG]  Root Device init finished in 4 msecs
2224:[DEBUG]  PCI: 00:1f.2 init finished in 12 msecs
```

I will try it on a few more boards.