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

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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 <fishbaozi@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84195
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
This commit is contained in:
Zheng Bao 2024-08-29 15:49:17 +08:00 • committed by Felix Held
commit b23382c54b
2 changed files with 9 additions and 0 deletions
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6
src/soc/amd/cezanne/Kconfig
View file

@ -408,6 +408,12 @@ config PSP_VERSTAGE_SIGNING_TOKEN
help
Add psp_verstage signature token to the build & PSP Directory Table
config PSP_RECOVERY_AB
bool "Use A/B Recovery scheme"
default n
help
Enable the PSP A/B Recovery mechanism
endmenu
config VBOOT

3
src/soc/amd/cezanne/Makefile.mk
View file

@ -182,6 +182,8 @@ OPT_PSP_SOFTFUSE=$(call add_opt_prefix, $(PSP_SOFTFUSE), --soft-fuse)
OPT_WHITELIST_FILE=$(call add_opt_prefix, $(PSP_WHITELIST_FILE), --whitelist)
OPT_SPL_TABLE_FILE=$(call add_opt_prefix, $(SPL_TABLE_FILE), --spl-table)
OPT_RECOVERY_AB=$(call add_opt_prefix, $(CONFIG_PSP_RECOVERY_AB), --recovery-ab)
AMDFW_COMMON_ARGS=$(OPT_PSP_APCB_FILES) \
$(OPT_PSP_NVRAM_BASE) \
$(OPT_PSP_NVRAM_SIZE) \
@ -204,6 +206,7 @@ AMDFW_COMMON_ARGS=$(OPT_PSP_APCB_FILES) \
$(OPT_EFS_SPI_READ_MODE) \
$(OPT_EFS_SPI_SPEED) \
$(OPT_EFS_SPI_MICRON_FLAG) \
$(OPT_RECOVERY_AB) \
--config $(CONFIG_AMDFW_CONFIG_FILE) \
--flashsize $(CONFIG_ROM_SIZE)