Index: /trunk/src/VBox/VMM/VMMAll/IEMAllCImplVmxInstr.cpp.h
===================================================================
--- /trunk/src/VBox/VMM/VMMAll/IEMAllCImplVmxInstr.cpp.h	(revision 79729)
+++ /trunk/src/VBox/VMM/VMMAll/IEMAllCImplVmxInstr.cpp.h	(revision 79730)
@@ -6374,11 +6374,14 @@
          * See Intel spec. 24.11.4 "Software Access to Related Structures".
          */
-        int rc = PGMHandlerPhysicalRegister(pVCpu->CTX_SUFF(pVM), GCPhysApicAccess, GCPhysApicAccess,
-                                            pVCpu->iem.s.hVmxApicAccessPage, NIL_RTR3PTR /* pvUserR3 */,
-                                            NIL_RTR0PTR /* pvUserR0 */,  NIL_RTRCPTR /* pvUserRC */, NULL /* pszDesc */);
-        if (RT_SUCCESS(rc))
-        { /* likely */ }
-        else
-            IEM_VMX_VMENTRY_FAILED_RET(pVCpu, pszInstr, pszFailure, kVmxVDiag_Vmentry_AddrApicAccessHandlerReg);
+        if (!PGMHandlerPhysicalIsRegistered(pVCpu->CTX_SUFF(pVM), GCPhysApicAccess))
+        {
+            int rc = PGMHandlerPhysicalRegister(pVCpu->CTX_SUFF(pVM), GCPhysApicAccess, GCPhysApicAccess + X86_PAGE_4K_SIZE - 1,
+                                                pVCpu->iem.s.hVmxApicAccessPage, NIL_RTR3PTR /* pvUserR3 */,
+                                                NIL_RTR0PTR /* pvUserR0 */,  NIL_RTRCPTR /* pvUserRC */, NULL /* pszDesc */);
+            if (RT_SUCCESS(rc))
+            { /* likely */ }
+            else
+                IEM_VMX_VMENTRY_FAILED_RET(pVCpu, pszInstr, pszFailure, kVmxVDiag_Vmentry_AddrApicAccessHandlerReg);
+        }
     }