Changeset 62115 in vbox

Timestamp:

Jul 7, 2016 4:13:01 PM (8 years ago)

Author:

vboxsync

Message:

SVM: Workaround for NMI/task switch trouble on old AMDs.

File:

• trunk/src/VBox/VMM/VMMR0/HMSVMR0.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMR0/HMSVMR0.cpp

@@ -3010 +3010 @@
     else if (!pVCpu->hm.s.Event.fPending)
         hmR0SvmEvaluatePendingEvent(pVCpu, pCtx);
+
+    /* On the oldest AMD-V systems, we may not get enough information to reinject an NMI.
+     * Just do it in software. See @bugref{8411}
+     * NB: If we could continue a task switch exit we wouldn't need to do this.
+     */
+    if (RT_UNLIKELY(pVCpu->hm.s.Event.fPending && (((pVCpu->hm.s.Event.u64IntInfo >> 8) & 7) == SVM_EVENT_NMI)))
+        if (RT_UNLIKELY(!pVM->hm.s.svm.u32Features))
+            return VINF_EM_RAW_INJECT_TRPM_EVENT;
 
 #ifdef HMSVM_SYNC_FULL_GUEST_STATE