hw/intc: Introduce x-query-interrupt-controllers QMP command

This is a counterpart to the HMP "info pic" command. It is being
added with an "x-" prefix because this QMP command is intended as an
adhoc debugging tool and will thus not be modelled in QAPI as fully
structured data, nor will it have long term guaranteed stability.
The existing HMP command is rewritten to call the QMP command.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20240610063518.50680-3-philmd@linaro.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/hw/core/machine-qmp-cmds.c b/hw/core/machine-qmp-cmds.c
index 5972100..130217d 100644
--- a/hw/core/machine-qmp-cmds.c
+++ b/hw/core/machine-qmp-cmds.c
@@ -361,6 +361,35 @@ HumanReadableText *qmp_x_query_irq(Error **errp)
     return human_readable_text_from_str(buf);
 }
 
+static int qmp_x_query_intc_foreach(Object *obj, void *opaque)
+{
+    InterruptStatsProvider *intc;
+    InterruptStatsProviderClass *k;
+    GString *buf = opaque;
+
+    if (object_dynamic_cast(obj, TYPE_INTERRUPT_STATS_PROVIDER)) {
+        intc = INTERRUPT_STATS_PROVIDER(obj);
+        k = INTERRUPT_STATS_PROVIDER_GET_CLASS(obj);
+        if (k->print_info) {
+            k->print_info(intc, buf);
+        } else {
+            g_string_append_printf(buf,
+                                   "Interrupt controller information not available for %s.\n",
+                                   object_get_typename(obj));
+        }
+    }
+
+    return 0;
+}
+
+HumanReadableText *qmp_x_query_interrupt_controllers(Error **errp)
+{
+    g_autoptr(GString) buf = g_string_new("");
+    object_child_foreach_recursive(object_get_root(),
+                                   qmp_x_query_intc_foreach, buf);
+    return human_readable_text_from_str(buf);
+}
+
 GuidInfo *qmp_query_vm_generation_id(Error **errp)
 {
     GuidInfo *info;