hmp: Add option to info qtree to omit details

The output of info qtree monitor command is very long. Add an option
to print a brief overview omitting all the details.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Dr. David Alan Gilbert <dave@treblig.org>
Message-ID: <20240307183812.0105D4E6004@zero.eik.bme.hu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

hmp-commands-info.hx

@@ -540,9 +540,9 @@ ERST
 
     {
         .name       = "qtree",
-        .args_type  = "",
-        .params     = "",
-        .help       = "show device tree",
+        .args_type  = "brief:-b",
+        .params     = "[-b]",
+        .help       = "show device tree (-b: brief, omit properties)",
         .cmd        = hmp_info_qtree,
     },
 

system/qdev-monitor.c

@@ -744,7 +744,6 @@ DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 }
 
 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
-static void qbus_print(Monitor *mon, BusState *bus, int indent);
 
 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
                              int indent)
@@ -784,13 +783,9 @@ static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int ind
 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 {
     ObjectClass *class;
-    BusState *child;
     NamedGPIOList *ngl;
     NamedClockList *ncl;
 
-    qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
-                dev->id ? dev->id : "");
-    indent += 2;
     QLIST_FOREACH(ngl, &dev->gpios, node) {
         if (ngl->num_in) {
             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
@@ -814,12 +809,9 @@ static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
         class = object_class_get_parent(class);
     } while (class != object_class_by_name(TYPE_DEVICE));
     bus_print_dev(dev->parent_bus, mon, dev, indent);
-    QLIST_FOREACH(child, &dev->child_bus, sibling) {
-        qbus_print(mon, child, indent);
-    }
 }
 
-static void qbus_print(Monitor *mon, BusState *bus, int indent)
+static void qbus_print(Monitor *mon, BusState *bus, int indent, bool details)
 {
     BusChild *kid;
 
@@ -827,16 +819,27 @@ static void qbus_print(Monitor *mon, BusState *bus, int indent)
     indent += 2;
     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
     QTAILQ_FOREACH(kid, &bus->children, sibling) {
+        BusState *child_bus;
         DeviceState *dev = kid->child;
-        qdev_print(mon, dev, indent);
+        qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
+                    dev->id ? dev->id : "");
+        if (details) {
+            qdev_print(mon, dev, indent + 2);
+        }
+        QLIST_FOREACH(child_bus, &dev->child_bus, sibling) {
+            qbus_print(mon, child_bus, indent + 2, details);
+        }
     }
 }
 #undef qdev_printf
 
 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 {
-    if (sysbus_get_default())
-        qbus_print(mon, sysbus_get_default(), 0);
+    bool details = !qdict_get_try_bool(qdict, "brief", false);
+
+    if (sysbus_get_default()) {
+        qbus_print(mon, sysbus_get_default(), 0, details);
+    }
 }
 
 void hmp_info_qdm(Monitor *mon, const QDict *qdict)