diff -r 3234b429fe04 -r 74c2b67b2684 src/cpu/kvm/BaseKvmCPU.py
--- a/src/cpu/kvm/BaseKvmCPU.py	Wed Mar 16 17:20:00 2016 +0000
+++ b/src/cpu/kvm/BaseKvmCPU.py	Wed Mar 16 17:43:46 2016 +0000
@@ -71,6 +71,8 @@
     kvmVM = Param.KvmVM(Parent.any, 'KVM VM (i.e., shared memory domain)')
     useCoalescedMMIO = Param.Bool(False, "Use coalesced MMIO (EXPERIMENTAL)")
     usePerfOverflow = Param.Bool(False, "Use perf event overflow counters (EXPERIMENTAL)")
+    alwaysSyncTC = Param.Bool(False,
+                              "Always sync thread contexts on entry/exit")
 
     hostFreq = Param.Clock("2GHz", "Host clock frequency")
     hostFactor = Param.Float(1.0, "Cycle scale factor")
diff -r 3234b429fe04 -r 74c2b67b2684 src/cpu/kvm/base.hh
--- a/src/cpu/kvm/base.hh	Wed Mar 16 17:20:00 2016 +0000
+++ b/src/cpu/kvm/base.hh	Wed Mar 16 17:43:46 2016 +0000
@@ -575,6 +575,12 @@
     KVMCpuPort instPort;
 
     /**
+     * Be conservative and always synchronize the thread context on
+     * KVM entry/exit.
+     */
+    const bool alwaysSyncTC;
+
+    /**
      * Is the gem5 context dirty? Set to true to force an update of
      * the KVM vCPU state upon the next call to kvmRun().
      */
diff -r 3234b429fe04 -r 74c2b67b2684 src/cpu/kvm/base.cc
--- a/src/cpu/kvm/base.cc	Wed Mar 16 17:20:00 2016 +0000
+++ b/src/cpu/kvm/base.cc	Wed Mar 16 17:43:46 2016 +0000
@@ -69,6 +69,7 @@
       _status(Idle),
       dataPort(name() + ".dcache_port", this),
       instPort(name() + ".icache_port", this),
+      alwaysSyncTC(params->alwaysSyncTC),
       threadContextDirty(true),
       kvmStateDirty(false),
       vcpuID(vm.allocVCPUID()), vcpuFD(-1), vcpuMMapSize(0),
@@ -557,6 +558,9 @@
               nextInstEvent > ctrInsts ?
               curEventQueue()->nextTick() - curTick() : 0);
 
+          if (alwaysSyncTC)
+              threadContextDirty = true;
+
           // We might need to update the KVM state.
           syncKvmState();
 
@@ -588,6 +592,9 @@
           // dirty with respect to the cached thread context.
           kvmStateDirty = true;
 
+          if (alwaysSyncTC)
+              syncThreadContext();
+
           // Enter into the RunningService state unless the
           // simulation was stopped by a timer.
           if (_kvmRun->exit_reason !=  KVM_EXIT_INTR) {