[coreboot-gerrit] Change in coreboot[master]: mrc_cache: Move mrc_cache_*_hash functions into mrc_cache driver

[Shelley Chen (Code Review)]

Shelley Chen has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/46510 )

Change subject: mrc_cache: Move mrc_cache_*_hash functions into mrc_cache driver
......................................................................

mrc_cache: Move mrc_cache_*_hash functions into mrc_cache driver

This CL would remove these calls from fsp 2.0.

BUG=b:150502246
BRANCH=None
TEST=make sure memory training still works on nami

Change-Id: I3088ca6927c7dbc65386c13e868afa0462086937
Signed-off-by: Shelley Chen 
---
M src/drivers/intel/fsp2_0/memory_init.c
M src/drivers/mrc_cache/mrc_cache.c
2 files changed, 7 insertions(+), 13 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/10/46510/1

diff --git a/src/drivers/intel/fsp2_0/memory_init.c b/src/drivers/intel/fsp2_0/memory_init.c
index 09aad6b..68cc121 100644
--- a/src/drivers/intel/fsp2_0/memory_init.c
+++ b/src/drivers/intel/fsp2_0/memory_init.c
@@ -19,18 +19,12 @@
 #include <symbols.h>
 #include <timestamp.h>
 #include <security/vboot/vboot_common.h>
-#include <security/vboot/mrc_cache_hash_tpm.h>
 #include <security/tpm/tspi.h>
 #include <vb2_api.h>
 #include <types.h>

static uint8_t temp_ram[CONFIG_FSP_TEMP_RAM_SIZE] __aligned(sizeof(uint64_t));

-/* TPM MRC hash functionality depends on vboot starting before memory init. */
-_Static_assert(!CONFIG(MRC_SAVE_HASH_IN_TPM) ||
-	       CONFIG(VBOOT_STARTS_IN_BOOTBLOCK),
-	       "for TPM MRC hash functionality, vboot must start in bootblock");
-
 static void save_memory_training_data(bool s3wake, uint32_t fsp_version)
 {
    size_t  mrc_data_size;
@@ -54,9 +48,6 @@
    if (mrc_cache_stash_data(MRC_TRAINING_DATA, fsp_version, mrc_data,
    			mrc_data_size) < 0)
    	printk(BIOS_ERR, "Failed to stash MRC data\n");
-
-	if (CONFIG(MRC_SAVE_HASH_IN_TPM))
-		mrc_cache_update_hash(mrc_data, mrc_data_size);
 }

static void do_fsp_post_memory_init(bool s3wake, uint32_t fsp_version)
@@ -121,10 +112,6 @@
    if (data == NULL)
    	return;

-	if (CONFIG(MRC_SAVE_HASH_IN_TPM) &&
-	    !mrc_cache_verify_hash(data, mrc_size))
-		return;
-
    /* MRC cache found */
    arch_upd->NvsBufferPtr = data;

diff --git a/src/drivers/mrc_cache/mrc_cache.c b/src/drivers/mrc_cache/mrc_cache.c
index a083655..30384e8 100644
--- a/src/drivers/mrc_cache/mrc_cache.c
+++ b/src/drivers/mrc_cache/mrc_cache.c
@@ -10,6 +10,7 @@
 #include <fmap.h>
 #include <ip_checksum.h>
 #include <region_file.h>
+#include <security/vboot/mrc_cache_hash_tpm.h>
 #include <security/vboot/vboot_common.h>
 #include <spi_flash.h>

@@ -185,6 +186,10 @@
    	return -1;
    }

+        // NOTE: we need to create the hash from both data and metadata values
+        if (CONFIG(MRC_SAVE_HASH_IN_TPM) && !mrc_cache_verify_hash(data, data_size))
+		return -1;
+
    return 0;
 }

@@ -443,6 +448,8 @@
    } else {
    	printk(BIOS_DEBUG, "MRC: updated '%s'.\n", cr->name);
    	log_event_cache_update(cr->elog_slot, UPDATE_SUCCESS);
+		if (CONFIG(MRC_SAVE_HASH_IN_TPM))
+			mrc_cache_update_hash(new_data, new_data_size);
    }
 }