security/vboot: Add store/validate methods for AMD VBIOS FMAP cache

Add methods to store and retrieve the hash of the data stored in the
VBIOS cache FMAP region. Add a dedicated index in TPM NVRAM to store
the hash, and methods to calculate/read/write it.

Modeled after mrc_cache_hash_tpm.{c,h}

BUG=b:255812886
TEST=tested with rest of patch train

Change-Id: I030017d3bf956b8593bc09073ad6545b80a5b52b
Signed-off-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72401
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/security/vboot/secdata_mock.c b/src/security/vboot/secdata_mock.c
index 57aed61a71..9d8c13d2ef 100644
--- a/src/security/vboot/secdata_mock.c
+++ b/src/security/vboot/secdata_mock.c
@@ -69,3 +69,13 @@ vb2_error_t antirollback_write_space_mrc_hash(uint32_t index, const uint8_t *dat
 {
 	return VB2_SUCCESS;
 }
+
+vb2_error_t antirollback_read_space_vbios_hash(uint8_t *data, uint32_t size)
+{
+	return VB2_SUCCESS;
+}
+
+vb2_error_t antirollback_write_space_vbios_hash(const uint8_t *data, uint32_t size)
+{
+	return VB2_SUCCESS;
+}