return EFI_SUCCESS;
}
+/*
+ * According to TCG EFI Protocol Specification for TPM 2.0 family,
+ * all events generated after the invocation of EFI_TCG2_GET_EVENT_LOG
+ * shall be stored in an instance of an EFI_CONFIGURATION_TABLE aka
+ * EFI TCG 2.0 final events table. Hence, it is necessary to trigger the
+ * internal switch through calling get_event_log() in order to allow
+ * to retrieve the logs from OS runtime.
+ */
+static EFI_STATUS trigger_tcg2_final_events_table(const EFI_TCG2 *tcg)
+{
+ return uefi_call_wrapper(tcg->GetEventLog, 5, tcg,
+ EFI_TCG2_EVENT_LOG_FORMAT_TCG_2, NULL,
+ NULL, NULL);
+}
static EFI_STATUS tpm2_measure_to_pcr_and_event_log(const EFI_TCG2 *tcg, UINT32 pcrindex, const EFI_PHYSICAL_ADDRESS buffer,
UINT64 buffer_size, const CHAR16 *description) {
EFI_STATUS status;
EFI_TCG2_EVENT *tcg_event;
UINTN desc_len;
+ static BOOLEAN triggered = FALSE;
+
+ if (triggered == FALSE) {
+ status = trigger_tcg2_final_events_table(tcg);
+ if (EFI_ERROR(status))
+ return status;
+
+ triggered = TRUE;
+ }
desc_len = StrLen(description) * sizeof(CHAR16);