[coreboot-gerrit] Change in ...coreboot[master]: security/memory: Clear memory in ramstage

[Patrick Rudolph (Code Review)]

Hello Kyösti Mälkki, Roy Wen, David Hendricks, Philipp Deppenwiese, build bot (Jenkins), Patrick Georgi, Martin Roth, Jens Drenhaus,

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

https://review.coreboot.org/c/coreboot/+/31550

to look at the new patch set (#10).

Change subject: security/memory: Clear memory in ramstage
......................................................................

security/memory: Clear memory in ramstage

* Add architecture independend way of clearing all DRAM
* Implemented in ramstage as MTRRs need to be set to speed up
  clearing. Takes up to 15 seconds per GiB otherwise.
* Use memset_pae on x86
* Add quirks for FSP1.0

Tested on P8H61M-Pro:
* Clears 4GiB in less than 1 second
Tested on wedge100s:
* Clears 8GiB in 2 seconds

Change-Id: Idaadb8fb438e5b95557c0f65a14534e8762fde20
Signed-off-by: Patrick Rudolph 
---
A src/arch/x86/include/arch/memory_clear.h
M src/security/memory/Kconfig
M src/security/memory/Makefile.inc
A src/security/memory/memory_clear.c
4 files changed, 187 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/50/31550/10