diff --git a/ArmPkg/ArmPkg.dec b/ArmPkg/ArmPkg.dec
index 112187fc46..67afd5953f 100644
--- a/ArmPkg/ArmPkg.dec
+++ b/ArmPkg/ArmPkg.dec
@@ -107,6 +107,8 @@
 
   gArmMmuReplaceLiveTranslationEntryFuncGuid = { 0xa8b50ff3, 0x08ec, 0x4dd3, {0xbf, 0x04, 0x28, 0xbf, 0x71, 0x75, 0xc7, 0x4a} }
 
+  gArmFfaRxTxBufferInfoGuid = { 0x96fd3d26, 0x6fb1, 0x11ef, { 0x8c, 0x11, 0xf3, 0xc9, 0xc5, 0x02, 0x31, 0xab } }
+
 [Protocols.common]
   ## Arm System Control and Management Interface(SCMI) Base protocol
   ## ArmPkg/Include/Protocol/ArmScmiBaseProtocol.h
@@ -318,6 +320,12 @@
   gArmTokenSpaceGuid.PcdSystemBiosRelease|0xFFFF|UINT16|0x30000058
   gArmTokenSpaceGuid.PcdEmbeddedControllerFirmwareRelease|0xFFFF|UINT16|0x30000059
 
+  #
+  # Define the conduit to use ArmFfalib.
+  # Default PcdFfaLibConduitSmc == TRUE, conduit = SMC
+  # If PcdFfaLibConduitSvc == FALSE, conduit = SVC
+  gArmTokenSpaceGuid.PcdFfaLibConduitSmc|TRUE|BOOLEAN|0x00000063
+
 [PcdsFixedAtBuild.common, PcdsDynamic.common]
   # ARM Architectural Timer Interrupt(GIC PPI) numbers
   gArmTokenSpaceGuid.PcdArmArchTimerSecIntrNum|29|UINT32|0x00000035
@@ -408,3 +416,7 @@
   # the LinuxBoot payload.
   #
   gArmTokenSpaceGuid.PcdLinuxBootFileGuid|{0x0}|VOID*|0x0000005C
+  gArmTokenSpaceGuid.PcdFfaTxBuffer|0x00|UINT64|0x0000005F
+  gArmTokenSpaceGuid.PcdFfaRxBuffer|0x00|UINT64|0x00000060
+  gArmTokenSpaceGuid.PcdFfaTxRxPageCount|1|UINT64|0x00000061
+  gArmTokenSpaceGuid.PcdFfaExitBootEventRegistered|FALSE|BOOLEAN|0x00000062