[XS] Change in coreboot[main]: soc/amd/cezanne: Add an option to enable A/B recovery scheme

[Bao Zheng (Code Review)]

Attention is currently required from: Bao Zheng, Fred Reitberger, Jason Glenesk, Matt DeVillier, Zheng Bao.

Hello Felix Held, Fred Reitberger, Jason Glenesk, Matt DeVillier, Zheng Bao, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/84195?usp=email

to look at the new patch set (#5).

Change subject: soc/amd/cezanne: Add an option to enable A/B recovery scheme
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soc/amd/cezanne: Add an option to enable A/B recovery scheme

Extracted from NDA spec #56995:
"The A/B recovery scheme formally separates the SPI flash space into
different partitions; a primary, “A” and secondary, “B”, which hold
the same set of system firmware. Under this scheme, the partitions A
and B can hold identical contents initially, but each partition can be
updated individually.

Normally the system boots from partition A, but if the A partition is
found to be corrupted, the system will switch to partition B and
boot. The OEM BIOS can then choose to continue the boot from partition
B, or repair partition A using contents from partition B."

The Cezanne platform supports both A/B recovery and no recovery
method. It needs this flag passed to amdfwtool to enable the A/B
recovery layout.

Change-Id: Id1c8028faee9c544628d65fd77be2a378ed7eab6
Signed-off-by: Zheng Bao 
---
M src/soc/amd/cezanne/Kconfig
M src/soc/amd/cezanne/Makefile.mk
2 files changed, 9 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/95/84195/5