[PATCH v3 2/3] SecurityPkg: add null version of RpmcLib

["Wang, Jian J" <jian.j.wang@intel.com>]

> v3: update retval description in RpmcLibNull.c

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2594

Add null version of RpmcLib instance. The full version should be provided
by platform which supports RPMC device.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Chao Zhang <chao.b.zhang@intel.com>
Cc: Nishant C Mistry <nishant.c.mistry@intel.com>
Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
---
 SecurityPkg/Library/RpmcLibNull/RpmcLibNull.c | 51 +++++++++++++++++++
 .../Library/RpmcLibNull/RpmcLibNull.inf       | 33 ++++++++++++
 SecurityPkg/SecurityPkg.dsc                   |  6 +++
 3 files changed, 90 insertions(+)
 create mode 100644 SecurityPkg/Library/RpmcLibNull/RpmcLibNull.c
 create mode 100644 SecurityPkg/Library/RpmcLibNull/RpmcLibNull.inf

diff --git a/SecurityPkg/Library/RpmcLibNull/RpmcLibNull.c b/SecurityPkg/Library/RpmcLibNull/RpmcLibNull.c
new file mode 100644
index 0000000000..79d480484e
--- /dev/null
+++ b/SecurityPkg/Library/RpmcLibNull/RpmcLibNull.c
@@ -0,0 +1,51 @@
+/** @file
+  NULL RpmcLib instance for build purpose.
+
+Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/DebugLib.h>
+#include <Library/RpmcLib.h>
+
+/**
+  Requests the current monotonic counter from the designated RPMC counter.
+
+  @param[in]    CounterId               Monotonic Counter Id.
+  @param[out]   CounterValue            A pointer to a buffer to store the RPMC value.
+
+  @retval       EFI_SUCCESS             The operation completed successfully.
+  @retval       EFI_DEVICE_ERROR        A device error occurred while attempting to update the counter.
+  @retval       EFI_UNSUPPORTED         The operation is un-supported.
+**/
+EFI_STATUS
+EFIAPI
+RequestMonotonicCounter (
+  IN  UINT8   CounterId,
+  OUT UINT32  *CounterValue
+  )
+{
+  ASSERT (FALSE);
+  return EFI_UNSUPPORTED;
+}
+
+/**
+  Increments the designated monotonic counter in the SPI flash device by 1.
+
+  @param[in]    CounterId               Monotonic Counter Id.
+
+  @retval       EFI_SUCCESS             The operation completed successfully.
+  @retval       EFI_DEVICE_ERROR        A device error occurred while attempting to update the counter.
+  @retval       EFI_UNSUPPORTED         The operation is un-supported.
+**/
+EFI_STATUS
+EFIAPI
+IncrementMonotonicCounter (
+  IN  UINT8   CounterId
+  )
+{
+  ASSERT (FALSE);
+  return EFI_UNSUPPORTED;
+}
+
diff --git a/SecurityPkg/Library/RpmcLibNull/RpmcLibNull.inf b/SecurityPkg/Library/RpmcLibNull/RpmcLibNull.inf
new file mode 100644
index 0000000000..500edfa87d
--- /dev/null
+++ b/SecurityPkg/Library/RpmcLibNull/RpmcLibNull.inf
@@ -0,0 +1,33 @@
+## @file
+#  Provides Null version of RpmcLib for build purpose.
+#
+#  Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010029
+  BASE_NAME                      = RpmcLibNull
+  FILE_GUID                      = FAE0BA22-92E2-4334-8F0F-96AFF9BAE360
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = RpmcLib
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 Arm AArch64
+#
+
+[Sources]
+  RpmcLibNull.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  SecurityPkg/SecurityPkg.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib
+
diff --git a/SecurityPkg/SecurityPkg.dsc b/SecurityPkg/SecurityPkg.dsc
index a2eeadda7a..97e0e7ed6e 100644
--- a/SecurityPkg/SecurityPkg.dsc
+++ b/SecurityPkg/SecurityPkg.dsc
@@ -64,6 +64,7 @@
   TcgStorageCoreLib|SecurityPkg/Library/TcgStorageCoreLib/TcgStorageCoreLib.inf
   TcgStorageOpalLib|SecurityPkg/Library/TcgStorageOpalLib/TcgStorageOpalLib.inf
   ResetSystemLib|MdeModulePkg/Library/BaseResetSystemLibNull/BaseResetSystemLibNull.inf
+  RpmcLib|SecurityPkg/Library/RpmcLibNull/RpmcLibNull.inf
 
 [LibraryClasses.ARM]
   #
@@ -217,6 +218,11 @@
   SecurityPkg/Library/TcgStorageCoreLib/TcgStorageCoreLib.inf
   SecurityPkg/Library/TcgStorageOpalLib/TcgStorageOpalLib.inf
 
+  #
+  # Variable Confidentiality & Integrity
+  #
+  SecurityPkg/Library/RpmcLibNull/RpmcLibNull.inf
+
   #
   # Other
   #
-- 
2.24.0.windows.2