diff --git a/MdePkg/Include/Register/Amd/Fam17Msr.h b/MdePkg/Include/Register/Amd/Fam17Msr.h
index cdb8f588cc..542e4cdf47 100644
--- a/MdePkg/Include/Register/Amd/Fam17Msr.h
+++ b/MdePkg/Include/Register/Amd/Fam17Msr.h
@@ -53,6 +53,11 @@ typedef union {
     UINT64  Features:52;
   } GhcbHypervisorFeatures;
 
+  struct {
+    UINT64  Function:12;
+    UINT64  GuestFrameNumber:52;
+  } GhcbGpaRegister;
+
   VOID    *Ghcb;
 
   UINT64  GhcbPhysicalAddress;
@@ -62,6 +67,8 @@ typedef union {
 #define GHCB_INFO_SEV_INFO_GET                      2
 #define GHCB_INFO_CPUID_REQUEST                     4
 #define GHCB_INFO_CPUID_RESPONSE                    5
+#define GHCB_INFO_GHCB_GPA_REGISTER_REQUEST         18
+#define GHCB_INFO_GHCB_GPA_REGISTER_RESPONSE        19
 #define GHCB_HYPERVISOR_FEATURES_REQUEST            128
 #define GHCB_HYPERVISOR_FEATURES_RESPONSE           129
 #define GHCB_INFO_TERMINATE_REQUEST                 256