2 files changed, 24 insertions, 0 deletions
diff --git a/trace/control.c b/trace/control.c
index 1a7bee6ddc..cb79bb17ec 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -259,6 +259,22 @@ void trace_init_file(const char *file)
 #endif
 }
 
+void trace_fini_vcpu(CPUState *vcpu)
+{
+    TraceEventIter iter;
+    TraceEvent *ev;
+
+    trace_event_iter_init(&iter, NULL);
+    while ((ev = trace_event_iter_next(&iter)) != NULL) {
+        if (trace_event_is_vcpu(ev) &&
+            trace_event_get_state_static(ev) &&
+            trace_event_get_vcpu_state_dynamic(vcpu, ev)) {
+            /* must disable to affect the global counter */
+            trace_event_set_vcpu_state_dynamic(vcpu, ev, false);
+        }
+    }
+}
+
 bool trace_init_backends(void)
 {
 #ifdef CONFIG_TRACE_SIMPLE
diff --git a/trace/control.h b/trace/control.h
index ccaeac8552..4ea53e2986 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -202,6 +202,14 @@ void trace_init_file(const char *file);
 void trace_init_vcpu(CPUState *vcpu);
 
 /**
+ * trace_fini_vcpu:
+ * @vcpu: Removed vCPU.
+ *
+ * Disable dynamic event state for a hot-unplugged vCPU.
+ */
+void trace_fini_vcpu(CPUState *vcpu);
+
+/**
  * trace_list_events:
  *
  * List all available events.