diff --git a/ArmPkg/Drivers/ArmGic/ArmGicLib.c b/ArmPkg/Drivers/ArmGic/ArmGicLib.c
index 001e6b1431..8ef32b33a1 100644
--- a/ArmPkg/Drivers/ArmGic/ArmGicLib.c
+++ b/ArmPkg/Drivers/ArmGic/ArmGicLib.c
@@ -199,6 +199,50 @@ ArmGicEndOfInterrupt (
   }
 }
 
+VOID
+EFIAPI
+ArmGicSetInterruptPriority (
+  IN UINTN                  GicDistributorBase,
+  IN UINTN                  GicRedistributorBase,
+  IN UINTN                  Source,
+  IN UINTN                  Priority
+  )
+{
+  UINT32                RegOffset;
+  UINTN                 RegShift;
+  ARM_GIC_ARCH_REVISION Revision;
+  UINTN                 GicCpuRedistributorBase;
+
+  // Calculate register offset and bit position
+  RegOffset = Source / 4;
+  RegShift = (Source % 4) * 8;
+
+  Revision = ArmGicGetSupportedArchRevision ();
+  if ((Revision == ARM_GIC_ARCH_REVISION_2) ||
+      FeaturePcdGet (PcdArmGicV3WithV2Legacy) ||
+      SourceIsSpi (Source)) {
+    MmioAndThenOr32 (
+      GicDistributorBase + ARM_GIC_ICDIPR + (4 * RegOffset),
+      ~(0xff << RegShift),
+      Priority << RegShift
+      );
+  } else {
+    GicCpuRedistributorBase = GicGetCpuRedistributorBase (
+                                GicRedistributorBase,
+                                Revision
+                                );
+    if (GicCpuRedistributorBase == 0) {
+      return;
+    }
+
+    MmioAndThenOr32 (
+      GicCpuRedistributorBase + ARM_GIC_ICDIPR + (4 * RegOffset),
+      ~(0xff << RegShift),
+      Priority << RegShift
+      );
+  }
+}
+
 VOID
 EFIAPI
 ArmGicEnableInterrupt (
diff --git a/ArmPkg/Include/Library/ArmGicLib.h b/ArmPkg/Include/Library/ArmGicLib.h
index 5509318963..7bcfc00111 100644
--- a/ArmPkg/Include/Library/ArmGicLib.h
+++ b/ArmPkg/Include/Library/ArmGicLib.h
@@ -208,6 +208,15 @@ ArmGicSetPriorityMask (
   IN  INTN          PriorityMask
   );
 
+VOID
+EFIAPI
+ArmGicSetInterruptPriority (
+  IN UINTN                  GicDistributorBase,
+  IN UINTN                  GicRedistributorBase,
+  IN UINTN                  Source,
+  IN UINTN                  Priority
+  );
+
 VOID
 EFIAPI
 ArmGicEnableInterrupt (