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-rw-r--r--softmmu/vl.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/softmmu/vl.c b/softmmu/vl.c
index 6c2427262b..b0b96f67fa 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -957,7 +957,18 @@ static const char *
 get_default_vga_model(const MachineClass *machine_class)
 {
     if (machine_class->default_display) {
-        return machine_class->default_display;
+        for (int t = 0; t < VGA_TYPE_MAX; t++) {
+            const VGAInterfaceInfo *ti = &vga_interfaces[t];
+
+            if (ti->opt_name && vga_interface_available(t) &&
+                g_str_equal(ti->opt_name, machine_class->default_display)) {
+                return machine_class->default_display;
+            }
+        }
+
+        warn_report_once("Default display '%s' is not available in this binary",
+                         machine_class->default_display);
+        return NULL;
     } else if (vga_interface_available(VGA_CIRRUS)) {
         return "cirrus";
     } else if (vga_interface_available(VGA_STD)) {
@@ -1283,6 +1294,13 @@ static void qemu_disable_default_devices(void)
         default_monitor = 0;
         default_net = 0;
         default_vga = 0;
+    } else {
+        if (default_net && machine_class->default_nic &&
+            !module_object_class_by_name(machine_class->default_nic)) {
+            warn_report("Default NIC '%s' is not available in this binary",
+                        machine_class->default_nic);
+            default_net = 0;
+        }
     }
 }