[coreboot-gerrit] Change in coreboot[master]: mrc_cache: Add config SAVE_MRC_CACHE for checking TPM hash

[Shelley Chen (Code Review)]

Shelley Chen has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/46433 )

Change subject: mrc_cache: Add config SAVE_MRC_CACHE for checking TPM hash
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mrc_cache: Add config SAVE_MRC_CACHE for checking TPM hash

As the mrc_cache training data is stored in RW, we calculate and store
a hash of the data in TPM NVRAM space.  This config will enable the
calculation and storing of the hash.

BUG=b:150502246
BRANCH=None
TEST=None

Change-Id: I4f8b00bec283683788da820de460cbe30719a1fb
Signed-off-by: Shelley Chen 
---
M src/drivers/mrc_cache/Kconfig
1 file changed, 7 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/33/46433/1

diff --git a/src/drivers/mrc_cache/Kconfig b/src/drivers/mrc_cache/Kconfig
index e09c5d8..2017b31 100644
--- a/src/drivers/mrc_cache/Kconfig
+++ b/src/drivers/mrc_cache/Kconfig
@@ -49,4 +49,11 @@
      that need to write back the MRC data in late ramstage boot
      states (MRC_WRITE_NV_LATE).

+config SAVE_MRC_HASH
+	bool
+	default y
+	help
+	  Store a hash of the MRC_CACHE training data to ensure in
+	  TPM NVRAM space.
+
 endif # CACHE_MRC_SETTINGS