Index: /trunk/src/VBox/VMM/VMMR0/HMSVMR0.cpp
===================================================================
--- /trunk/src/VBox/VMM/VMMR0/HMSVMR0.cpp	(revision 55734)
+++ /trunk/src/VBox/VMM/VMMR0/HMSVMR0.cpp	(revision 55735)
@@ -1877,5 +1877,5 @@
                ("fContextUseFlags=%#RX32\n", HMCPU_CF_VALUE(pVCpu)));
 
-    Log4(("Load: CS:RIP=%04x:%RX64 EFL=%#x SS:RSP=%04x:%RX64\n", pCtx->cs.Sel, pCtx->rip, pCtx->eflags.u, pCtx->ss, pCtx->rsp));
+    Log4(("Load: CS:RIP=%04x:%RX64 EFL=%#x SS:RSP=%04x:%RX64\n", pCtx->cs.Sel, pCtx->rip, pCtx->eflags.u, pCtx->ss.Sel, pCtx->rsp));
     STAM_PROFILE_ADV_STOP(&pVCpu->hm.s.StatLoadGuestState, x);
     return rc;
@@ -4490,7 +4490,10 @@
 {
     HMSVM_VALIDATE_EXIT_HANDLER_PARAMS();
+
     /** @todo Decode Assist. */
-    VBOXSTRICTRC rc2 = EMInterpretInstruction(pVCpu, CPUMCTX2CORE(pCtx), 0 /* pvFault */);
-    int rc = VBOXSTRICTRC_VAL(rc2);
+    VBOXSTRICTRC rc = IEMExecOneBypassEx(pVCpu, CPUMCTX2CORE(pCtx), NULL);
+    if (RT_UNLIKELY(   rc == VERR_IEM_ASPECT_NOT_IMPLEMENTED
+                    || rc == VERR_IEM_INSTR_NOT_IMPLEMENTED))
+        rc = VERR_EM_INTERPRETER;
     if (rc == VINF_SUCCESS)
     {
@@ -4734,4 +4737,6 @@
 
     pVCpu->hm.s.fLoadSaveGuestXcr0 = (pCtx->cr4 & X86_CR4_OSXSAVE) && pCtx->aXcr[0] != ASMGetXcr0();
+    Log4(("hmR0SvmExitXsetbv: New XCR0=%#RX64 fLoadSaveGuestXcr0=%d (cr4=%RX64) rcStrict=%Rrc\n", 
+          pCtx->aXcr[0], pVCpu->hm.s.fLoadSaveGuestXcr0, pCtx->cr4, VBOXSTRICTRC_VAL(rcStrict)));
 
     HMSVM_CHECK_SINGLE_STEP(pVCpu, rcStrict);