Index: /trunk/src/VBox/VMM/VMMR0/HMSVMR0.cpp
===================================================================
--- /trunk/src/VBox/VMM/VMMR0/HMSVMR0.cpp	(revision 46671)
+++ /trunk/src/VBox/VMM/VMMR0/HMSVMR0.cpp	(revision 46672)
@@ -2506,4 +2506,8 @@
     STAM_COUNTER_INC(&pVCpu->hm.s.StatLoadFull);
 
+    /* If VMCB Clean Bits isn't supported by the CPU, simply mark all state-bits as dirty, indicating (re)load-from-VMCB. */
+    if (!(pVM->hm.s.svm.u32Features & AMD_CPUID_SVM_FEATURE_EDX_VMCB_CLEAN))
+        pVmcb->ctrl.u64VmcbCleanBits = 0;
+
     /*
      * If we're not intercepting TPR changes in the guest, save the guest TPR before the world-switch