diff --git a/MdePkg/Include/IndustryStandard/Acpi65.h b/MdePkg/Include/IndustryStandard/Acpi65.h
index 218f909160..1f2af6ad2a 100644
--- a/MdePkg/Include/IndustryStandard/Acpi65.h
+++ b/MdePkg/Include/IndustryStandard/Acpi65.h
@@ -2,7 +2,7 @@
ACPI 6.5 definitions from the ACPI Specification Revision 6.5 Aug, 2022.
Copyright (c) 2017 - 2022, Intel Corporation. All rights reserved.
- Copyright (c) 2019 - 2023, ARM Ltd. All rights reserved.
+ Copyright (c) 2019 - 2024, ARM Ltd. All rights reserved.
Copyright (c) 2023, Loongson Technology Corporation Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -3268,6 +3268,11 @@ typedef struct {
///
#define EFI_ACPI_6_5_XEN_PROJECT_TABLE_SIGNATURE SIGNATURE_32('X', 'E', 'N', 'V')
+///
+/// "MPAM" Memory System Resource Partitioning and Monitoring Table
+///
+#define EFI_ACPI_MEMORY_SYSTEM_RESOURCE_PARTITIONING_AND_MONITORING_TABLE_SIGNATURE SIGNATURE_32('M', 'P', 'A', 'M')
+
#pragma pack()
#endif
diff --git a/MdePkg/Include/IndustryStandard/Mpam.h b/MdePkg/Include/IndustryStandard/Mpam.h
new file mode 100644
index 0000000000..8358b35d81
--- /dev/null
+++ b/MdePkg/Include/IndustryStandard/Mpam.h
@@ -0,0 +1,246 @@
+/** @file
+ ACPI for Memory System Resource Partitioning and Monitoring 2.0 (MPAM) as
+ specified in ARM spec DEN0065
+
+ Copyright (c) 2024, Arm Limited. All rights reserved.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ @par Specification Reference:
+ - [1] ACPI for Memory System Resource Partitioning and Monitoring 2.0
+ (https://developer.arm.com/documentation/den0065/latest)
+
+ @par Glossary:
+ - MPAM - Memory System Resource Partitioning And Monitoring
+ - MSC - Memory System Component
+ - PCC - Platform Communication Channel
+ - RIS - Resource Instance Selection
+ - SMMU - Arm System Memory Management Unit
+ **/
+
+#ifndef MPAM_H_
+#define MPAM_H_
+
+#include
+
+///
+/// MPAM Revision
+///
+#define EFI_ACPI_MEMORY_SYSTEM_RESOURCE_PARTITIONING_AND_MONITORING_TABLE_REVISION (0x01)
+
+///
+/// MPAM Interrupt mode
+///
+#define EFI_ACPI_MPAM_INTERRUPT_LEVEL_TRIGGERED (0x0)
+#define EFI_ACPI_MPAM_INTERRUPT_EDGE_TRIGGERED (0x1)
+
+///
+/// MPAM Interrupt type
+///
+#define EFI_ACPI_MPAM_INTERRUPT_WIRED (0x0)
+
+///
+/// MPAM Interrupt affinity type
+///
+#define EFI_ACPI_MPAM_INTERRUPT_PROCESSOR_AFFINITY (0x0)
+#define EFI_ACPI_MPAM_INTERRUPT_PROCESSOR_CONTAINER_AFFINITY (0x1)
+
+///
+/// MPAM MSC affinity valid
+///
+#define EFI_ACPI_MPAM_INTERRUPT_AFFINITY_NOT_VALID (0x0)
+#define EFI_ACPI_MPAM_INTERRUPT_AFFINITY_VALID (0x1)
+
+///
+/// MPAM Interrupt flag - bit positions
+///
+#define EFI_ACPI_MPAM_INTERRUPT_MODE_SHIFT (0)
+#define EFI_ACPI_MPAM_INTERRUPT_TYPE_SHIFT (1)
+#define EFI_ACPI_MPAM_INTERRUPT_AFFINITY_TYPE_SHIFT (3)
+#define EFI_ACPI_MPAM_INTERRUPT_AFFINITY_VALID_SHIFT (4)
+#define EFI_ACPI_MPAM_INTERRUPT_RESERVED_SHIFT (5)
+
+///
+/// MPAM Interrupt flag - bit masks
+///
+#define EFI_ACPI_MPAM_INTERRUPT_MODE_MASK (0x1)
+#define EFI_ACPI_MPAM_INTERRUPT_TYPE_MASK (0x3)
+#define EFI_ACPI_MPAM_INTERRUPT_AFFINITY_TYPE_MASK (0x8)
+#define EFI_ACPI_MPAM_INTERRUPT_AFFINITY_VALID_MASK (0x10)
+#define EFI_ACPI_MPAM_INTERRUPT_RESERVED_MASK (0xFFFFFFE0)
+
+///
+/// MPAM Location types
+/// as described in document [1], table 11.
+///
+#define EFI_ACPI_MPAM_LOCATION_PROCESSOR_CACHE (0x0)
+#define EFI_ACPI_MPAM_LOCATION_MEMORY (0x1)
+#define EFI_ACPI_MPAM_LOCATION_SMMU (0x2)
+#define EFI_ACPI_MPAM_LOCATION_MEMORY_CACHE (0x3)
+#define EFI_ACPI_MPAM_LOCATION_ACPI_DEVICE (0x4)
+#define EFI_ACPI_MPAM_LOCATION_INTERCONNECT (0x5)
+#define EFI_ACPI_MPAM_LOCATION_UNKNOWN (0xFF)
+
+///
+/// MPAM Interface types
+/// as desscribed in document[1], table 4.
+///
+#define EFI_ACPI_MPAM_INTERFACE_MMIO (0x00)
+#define EFI_ACPI_MPAM_INTERFACE_PCC (0x0A)
+
+///
+/// MPAM Link types
+/// as described in document [1], table 19.
+///
+#define EFI_ACPI_MPAM_LINK_TYPE_NUMA (0x00)
+#define EFI_ACPI_MPAM_LINK_TYPE_PROC (0x01)
+
+#pragma pack(1)
+
+///
+/// MPAM MSC generic locator descriptor
+/// as described in document [1], table 12.
+///
+typedef struct {
+ UINT64 Descriptor1;
+ UINT32 Descriptor2;
+} EFI_ACPI_MPAM_GENERIC_LOCATOR;
+
+///
+/// MPAM processor cache locator descriptor
+/// as described in document [1], table 13.
+///
+typedef struct {
+ UINT64 CacheReference;
+ UINT32 Reserved;
+} EFI_ACPI_MPAM_CACHE_LOCATOR;
+
+///
+/// MPAM memory locator descriptor
+/// as described in document [1], table 14.
+///
+typedef struct {
+ UINT64 ProximityDomain;
+ UINT32 Reserved;
+} EFI_ACPI_MPAM_MEMORY_LOCATOR;
+
+///
+/// MPAM SMMU locator descriptor
+/// as described in document [1], table 15.
+///
+typedef struct {
+ UINT64 SmmuInterface;
+ UINT32 Reserved;
+} EFI_ACPI_MPAM_SMMU_LOCATOR;
+
+///
+/// MPAM memory-side cache locator descriptor
+/// as described in Document [1], table 16.
+///
+typedef struct {
+ UINT8 Reserved[7];
+ UINT8 Level;
+ UINT32 Reference;
+} EFI_ACPI_MPAM_MEMORY_CACHE_LOCATOR;
+
+///
+/// MPAM ACPI device locator descriptor
+/// as described in document [1], table 17.
+///
+typedef struct {
+ UINT64 AcpiHardwareId;
+ UINT32 AcpiUniqueId;
+} EFI_ACPI_MPAM_ACPI_LOCATOR;
+
+///
+/// MPAM interconnect locator descriptor
+/// as described in document [1], table 18.
+///
+typedef struct {
+ UINT64 InterconnectDescTblOff;
+ UINT32 Reserved;
+} EFI_ACPI_MPAM_INTERCONNECT_LOCATOR;
+
+///
+/// MPAM interconnect descriptor
+/// as described in document [1], table 19.
+///
+typedef struct {
+ UINT32 SourceId;
+ UINT32 DestinationId;
+ UINT8 LinkType;
+ UINT8 Reserved[3];
+} EFI_ACPI_MPAM_INTERCONNECT_DESCRIPTOR;
+
+///
+/// MPAM interconnect descriptor table
+/// as described in document [1], table 20.
+///
+typedef struct {
+ UINT8 Signature[16];
+ UINT32 NumDescriptors;
+} EFI_ACPI_MPAM_INTERCONNECT_DESCRIPTOR_TABLE;
+
+///
+/// MPAM resource locator
+///
+typedef union {
+ EFI_ACPI_MPAM_CACHE_LOCATOR CacheLocator;
+ EFI_ACPI_MPAM_MEMORY_LOCATOR MemoryLocator;
+ EFI_ACPI_MPAM_SMMU_LOCATOR SmmuLocator;
+ EFI_ACPI_MPAM_MEMORY_CACHE_LOCATOR MemCacheLocator;
+ EFI_ACPI_MPAM_ACPI_LOCATOR AcpiLocator;
+ EFI_ACPI_MPAM_INTERCONNECT_LOCATOR InterconnectIfcLocator;
+ EFI_ACPI_MPAM_GENERIC_LOCATOR GenericLocator;
+} EFI_ACPI_MPAM_LOCATOR;
+
+///
+/// MPAM MSC node body
+/// as described document [1], table 4.
+///
+typedef struct {
+ UINT16 Length;
+ UINT8 InterfaceType;
+ UINT8 Reserved;
+ UINT32 Identifier;
+ UINT64 BaseAddress;
+ UINT32 MmioSize;
+ UINT32 OverflowInterrupt;
+ UINT32 OverflowInterruptFlags;
+ UINT32 Reserved1;
+ UINT32 OverflowInterruptAffinity;
+ UINT32 ErrorInterrupt;
+ UINT32 ErrorInterruptFlags;
+ UINT32 Reserved2;
+ UINT32 ErrorInterruptAffinity;
+ UINT32 MaxNrdyUsec;
+ UINT64 HardwareIdLinkedDevice;
+ UINT32 InstanceIdLinkedDevice;
+ UINT32 NumResources;
+} EFI_ACPI_MPAM_MSC_NODE;
+
+///
+/// MPAM MSC resource
+/// as described in document [1], table 9.
+///
+typedef struct {
+ UINT32 Identifier;
+ UINT8 RisIndex;
+ UINT16 Reserved1;
+ UINT8 LocatorType;
+ EFI_ACPI_MPAM_LOCATOR Locator;
+ UINT32 NumFunctionalDependencies;
+} EFI_ACPI_MPAM_MSC_RESOURCE;
+
+///
+/// MPAM Function dependency descriptor
+/// as described in document [1], table 10.
+///
+typedef struct {
+ UINT32 Producer;
+ UINT32 Reserved;
+} EFI_ACPI_MPAM_FUNCTIONAL_DEPENDENCY_DESCRIPTOR;
+
+#pragma pack()
+
+#endif