diff --git a/MdeModulePkg/Include/Guid/MmCommBuffer.h b/MdeModulePkg/Include/Guid/MmCommBuffer.h
new file mode 100644
index 0000000000..df4ea317eb
--- /dev/null
+++ b/MdeModulePkg/Include/Guid/MmCommBuffer.h
@@ -0,0 +1,63 @@
+/** @file
+  MM Communication buffer data.
+
+Copyright (c) 2024, Intel Corporation. All rights reserved.<BR>
+
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef MM_COMM_BUFFER_H_
+#define MM_COMM_BUFFER_H_
+
+///
+/// The GUID of the MM Communication buffer HOB.
+///
+#define MM_COMM_BUFFER_HOB_GUID \
+  { 0x6c2a2520, 0x0131, 0x4aee, { 0xa7, 0x50, 0xcc, 0x38, 0x4a, 0xac, 0xe8, 0xc6 }}
+
+///
+/// The MM communicate buffer facilitates data sharing between non-MM and MM code.
+/// The MM IPL code allocates a "fixed" runtime type memory as the MM communication buffer,
+/// and communicates its address and size to MM Core via MmCommBuffer GUIDed HOB.
+/// Here, "fixed" implies that the buffer's location remains constant throughout the boot process.
+/// Data is exchanged between the MM Communication PPI/Protocol and a software MMI handler
+/// using this fixed MM communication buffer.
+///
+typedef struct {
+  ///
+  /// The address of the 4-KiB aligned fixed MM communication buffer.
+  ///
+  EFI_PHYSICAL_ADDRESS    PhysicalStart;
+
+  ///
+  /// Size of the fixed MM communication buffer, in 4KiB pages.
+  ///
+  UINT64                  NumberOfPages;
+
+  ///
+  /// Point to MM_COMM_BUFFER_STATUS structure.
+  ///
+  EFI_PHYSICAL_ADDRESS    Status;
+} MM_COMM_BUFFER;
+
+typedef struct {
+  ///
+  /// Whether the data in the fixed MM communication buffer is valid when entering from non-MM to MM.
+  ///
+  BOOLEAN    IsCommBufferValid;
+
+  ///
+  /// The return status when returning from MM to non-MM.
+  ///
+  UINT64     ReturnStatus;
+
+  ///
+  /// The size in bytes of the output buffer when returning from MM to non-MM.
+  ///
+  UINT64     ReturnBufferSize;
+} MM_COMM_BUFFER_STATUS;
+
+extern EFI_GUID  gMmCommBufferHobGuid;
+
+#endif
diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 693e45911b..e71a4dd5e3 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -485,6 +485,9 @@
   ## HOB GUID to get ACPI table after FSP is done. The ACPI table that related SOC will be pass by this HOB.
   gAcpiTableHobGuid = { 0xf9886b57, 0x8a35, 0x455e, { 0xbb, 0xb1, 0x14, 0x65, 0x5e, 0x7b, 0xe7, 0xec }}
 
+  ## Include/Guid/MmCommBuffer.h
+  gMmCommBufferHobGuid  = { 0x6c2a2520, 0x0131, 0x4aee, { 0xa7, 0x50, 0xcc, 0x38, 0x4a, 0xac, 0xe8, 0xc6 }}
+
 [Ppis]
   ## Include/Ppi/FirmwareVolumeShadowPpi.h
   gEdkiiPeiFirmwareVolumeShadowPpiGuid = { 0x7dfe756c, 0xed8d, 0x4d77, {0x9e, 0xc4, 0x39, 0x9a, 0x8a, 0x81, 0x51, 0x16 } }