security/tpm: Fix TCPA log feature

Until now the TCPA log wasn't working correctly.

* Refactor TCPA log code.
* Add TCPA log dump fucntion.
* Make TCPA log available in bootblock.
* Fix TCPA log formatting.
* Add x86 and Cavium memory for early log.

Change-Id: Ic93133531b84318f48940d34bded48cbae739c44
Signed-off-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/29563
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

1 files changed, 24 insertions, 4 deletions

diff --git a/src/security/tpm/tspi.h b/src/security/tpm/tspi.h
index d69b97695d..55f883c481 100644
--- a/src/security/tpm/tspi.h
+++ b/src/security/tpm/tspi.h
@@ -21,26 +21,46 @@
 #include <security/tpm/tss.h>
 #include <commonlib/tcpa_log_serialized.h>
 #include <commonlib/region.h>
+#include <vb2_api.h>
 
-#define TPM_PCR_MAX_LEN		64
-#define HASH_DATA_CHUNK_SIZE	1024
+#define TPM_PCR_MAX_LEN 64
+#define HASH_DATA_CHUNK_SIZE 1024
+
+/**
+ * Clears the pre-RAM tcpa log data and initializes
+ * any content with default values
+ */
+void tcpa_preram_log_clear(void);
 
 /**
  * Add table entry for cbmem TCPA log.
+ * @param name Name of the hashed data
+ * @param pcr PCR used to extend hashed data
+ * @param diget_algo sets the digest algorithm
+ * @param digest sets the hash extended into the tpm
+ * @param digest_len the length of the digest
  */
 void tcpa_log_add_table_entry(const char *name, const uint32_t pcr,
+			      enum vb2_hash_algorithm digest_algo,
 			      const uint8_t *digest,
-			      const size_t digest_length);
+			      const size_t digest_len);
+
+/**
+ * Dump TCPA log entries on console
+ */
+void tcpa_log_dump(void *unused);
 
 /**
  * Ask vboot for a digest and extend a TPM PCR with it.
  * @param pcr sets the pcr index
+ * @param diget_algo sets the digest algorithm
  * @param digest sets the hash to extend into the tpm
  * @param digest_len the length of the digest
  * @param name sets additional info where the digest comes from
  * @return TPM_SUCCESS on success. If not a tpm error is returned
  */
-uint32_t tpm_extend_pcr(int pcr, uint8_t *digest, size_t digest_len,
+uint32_t tpm_extend_pcr(int pcr, enum vb2_hash_algorithm digest_algo,
+			uint8_t *digest, size_t digest_len,
 			const char *name);
 
 /**