diff --git a/hw/boards.h b/hw/boards.h
index 667177d..2bae071 100644
--- a/hw/boards.h
+++ b/hw/boards.h
@@ -28,6 +28,7 @@ typedef struct QEMUMachine {
     int is_default;
     const char *default_machine_opts;
     GlobalProperty *compat_props;
+    const char *compat_cpu_features;
     struct QEMUMachine *next;
 } QEMUMachine;
 
diff --git a/hw/pc.c b/hw/pc.c
index bb9867b..4d11559 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -949,8 +949,9 @@ static CPUState *pc_new_cpu(const char *cpu_model)
     return env;
 }
 
-void pc_cpus_init(const char *cpu_model)
+void pc_cpus_init(const char *cpu_model, const char *append_features)
 {
+    char *model_and_features;
     int i;
 
     /* init CPUs */
@@ -961,10 +962,13 @@ void pc_cpus_init(const char *cpu_model)
         cpu_model = "qemu32";
 #endif
     }
+    model_and_features = g_strconcat(cpu_model, ",", append_features, NULL);
 
     for(i = 0; i < smp_cpus; i++) {
-        pc_new_cpu(cpu_model);
+        pc_new_cpu(model_and_features);
     }
+
+    g_free(model_and_features);
 }
 
 void pc_memory_init(MemoryRegion *system_memory,