[S] Change in coreboot[main]: drivers/smmstore/ramstage.c: retry smmstore init up 5 times

[Michał Kopeć (Code Review)]

Attention is currently required from: Krystian Hebel, Michał Kopeć, Michał Żygowski, Paul Menzel, Tim Crawford.

Hello Krystian Hebel, Michał Żygowski, Patrick Rudolph, Sean Rhodes, Tim Crawford, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/73981?usp=email

to look at the new patch set (#2).

The following approvals got outdated and were removed:
Code-Review+1 by Tim Crawford, Verified-1 by build bot (Jenkins)

Change subject: drivers/smmstore/ramstage.c: retry smmstore init up 5 times
......................................................................

drivers/smmstore/ramstage.c: retry smmstore init up 5 times

Retry calling the SMI 5 times in case the initial write to APM did not
cause SMM entry immediately.

Fixes occasional SMMSTORE initialization failure on Clevo NV4xPZ with
Intel i5-1240P processor. The issue was especially evident when all
logging in coreboot was disabled.

Based on SMMSTORE implementation in MrChromebox's fork of EDK2:
https://github.com/MrChromebox/edk2/commit/27854bc8c5e7147f01e50404f6e5b16ff...

Change-Id: I8929af25c4f69873bbdd835fde5cb60fc324b6ab
Signed-off-by: Michał Kopeć 
---
M src/drivers/smmstore/ramstage.c
1 file changed, 12 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/81/73981/2