1 files changed, 85 insertions, 0 deletions
diff --git a/MdeModulePkg/Library/TdxMeasurementLibNull/TdxMeasurementLibNull.c b/MdeModulePkg/Library/TdxMeasurementLibNull/TdxMeasurementLibNull.c
new file mode 100644
index 0000000..1a29557
--- /dev/null
+++ b/MdeModulePkg/Library/TdxMeasurementLibNull/TdxMeasurementLibNull.c
@@ -0,0 +1,85 @@
+/** @file
+  NULL instance of TdxMeasurementLib
+  Copyright (c) 2025, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Base.h>
+#include <PiPei.h>
+#include <Library/TdxMeasurementLib.h>
+
+/**
+  According to UEFI Spec 2.10 Section 38.4.1:
+    The following table shows the TPM PCR index mapping and CC event log measurement
+  register index interpretation for Intel TDX, where MRTD means Trust Domain Measurement
+   Register and RTMR means Runtime Measurement Register
+    // TPM PCR Index | CC Measurement Register Index | TDX-measurement register
+    //  ------------------------------------------------------------------------
+    // 0             |   0                           |   MRTD
+    // 1, 7          |   1                           |   RTMR[0]
+    // 2~6           |   2                           |   RTMR[1]
+    // 8~15          |   3                           |   RTMR[2]
+  @param[in] PCRIndex Index of the TPM PCR
+  @retval    UINT32               Index of the CC Event Log Measurement Register Index
+  @retval    CC_MR_INDEX_INVALID  Invalid MR Index
+**/
+UINT32
+EFIAPI
+TdxMeasurementMapPcrToMrIndex (
+  IN  UINT32  PCRIndex
+  )
+{
+  return CC_MR_INDEX_INVALID;
+}
+
+/**
+ * Calculate the sha384 of input Data and extend it to RTMR register.
+ *
+ * @param RtmrIndex       Index of the RTMR register
+ * @param DataToHash      Data to be hashed
+ * @param DataToHashLen   Length of the data
+ * @param Digest          Hash value of the input data
+ * @param DigestLen       Length of the hash value
+ *
+ * @retval EFI_SUCCESS    Successfully hash and extend to RTMR
+ * @retval Others         Other errors as indicated
+ */
+EFI_STATUS
+EFIAPI
+TdxMeasurementHashAndExtendToRtmr (
+  IN UINT32  RtmrIndex,
+  IN VOID    *DataToHash,
+  IN UINTN   DataToHashLen,
+  OUT UINT8  *Digest,
+  IN  UINTN  DigestLen
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+/**
+ * Build GuidHob for Tdx CC measurement event.
+ *
+ * @param RtmrIndex     RTMR index
+ * @param EventType     Event type
+ * @param EventData     Event data
+ * @param EventSize     Size of event data
+ * @param HashValue     Hash value
+ * @param HashSize      Size of hash
+ *
+ * @retval EFI_SUCCESS  Successfully build the GuidHobs
+ * @retval Others       Other error as indicated
+ */
+EFI_STATUS
+EFIAPI
+TdxMeasurementBuildGuidHob (
+  UINT32  RtmrIndex,
+  UINT32  EventType,
+  UINT8   *EventData,
+  UINT32  EventSize,
+  UINT8   *HashValue,
+  UINT32  HashSize
+  )
+{
+  return EFI_UNSUPPORTED;
+}