Change in coreboot[master]: cpu/x86/mp_init.c: Add wait_finished_mp_run_on_all_cpus

[Arthur Heymans (Code Review)]

Attention is currently required from: Arthur Heymans, Kane Chen, Tim Wawrzynczak.
Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63553 )

Change subject: cpu/x86/mp_init.c: Add wait_finished_mp_run_on_all_cpus
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Patch Set 5:

(2 comments)

Patchset:

PS3:
> i tried this patch and the race condition is gone.
>
> I also base on Arthur's patch to create another solution. not sure if you like it.
> see https://review.coreboot.org/c/coreboot/+/63566
>
> basically it adds a parameter wait_ap_complete in mp_callback and it can decide AP calls store_callback before or after lcb.func(lcb.arg)

It looks better indeed but I have to take a deeper look.

Patchset:

PS5: 
Ow I pushed an older version here...