diff --git a/ArmPkg/Include/Library/ArmLib.h b/ArmPkg/Include/Library/ArmLib.h
index 24e84c7a19..ffda50e9d7 100644
--- a/ArmPkg/Include/Library/ArmLib.h
+++ b/ArmPkg/Include/Library/ArmLib.h
@@ -558,6 +558,12 @@ ArmReadSctlr (
   VOID
   );
 
+VOID
+EFIAPI
+ArmWriteSctlr (
+  IN  UINT32   Value
+  );
+
 UINTN
 EFIAPI
 ArmReadHVBar (
diff --git a/ArmPkg/Library/ArmLib/AArch64/ArmLibSupport.S b/ArmPkg/Library/ArmLib/AArch64/ArmLibSupport.S
index 9d3dd66b10..1ef2f61f59 100644
--- a/ArmPkg/Library/ArmLib/AArch64/ArmLibSupport.S
+++ b/ArmPkg/Library/ArmLib/AArch64/ArmLibSupport.S
@@ -187,4 +187,13 @@ ASM_FUNC(ArmReadSctlr)
 3:mrs   x0, sctlr_el3
 4:ret
 
+ASM_FUNC(ArmWriteSctlr)
+  EL1_OR_EL2_OR_EL3(x1)
+1:msr   sctlr_el1, x0
+  ret
+2:msr   sctlr_el2, x0
+  ret
+3:msr   sctlr_el3, x0
+4:ret
+
 ASM_FUNCTION_REMOVE_IF_UNREFERENCED
diff --git a/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.S b/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.S
index a0b5ed5002..149b57e059 100644
--- a/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.S
+++ b/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.S
@@ -153,6 +153,10 @@ ASM_FUNC(ArmReadSctlr)
   mrc     p15, 0, r0, c1, c0, 0      @ Read SCTLR into R0 (Read control register configuration data)
   bx      lr
 
+ASM_FUNC(ArmWriteSctlr)
+  mcr     p15, 0, r0, c1, c0, 0
+  bx      lr
+
 ASM_FUNC(ArmReadCpuActlr)
   mrc     p15, 0, r0, c1, c0, 1
   bx      lr
diff --git a/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.asm b/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.asm
index 85b0feee20..219140c22b 100644
--- a/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.asm
+++ b/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.asm
@@ -155,6 +155,9 @@
   mrc     p15, 0, r0, c1, c0, 0      // Read SCTLR into R0 (Read control register configuration data)
   bx      lr
 
+ RVCT_ASM_EXPORT ArmWriteSctlr
+  mcr     p15, 0, r0, c1, c0, 0
+  bx      lr
 
  RVCT_ASM_EXPORT ArmReadCpuActlr
   mrc     p15, 0, r0, c1, c0, 1