[PATCH 07/18] Introduce machine's default-audiodev property

[Martin Kletzander <mkletzan@redhat.com>]

Many machine types have default audio devices with no way to set the underlying
audiodev.  Instead of adding an option for each and every one of them this new
property can be used as a default during machine initialisation when creating
such devices.

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
---
 hw/core/machine.c   | 23 +++++++++++++++++++++++
 include/hw/boards.h |  1 +
 2 files changed, 24 insertions(+)

diff --git a/hw/core/machine.c b/hw/core/machine.c
index cb9bbc844d24..d055a126d398 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -596,6 +596,22 @@ static void machine_set_memdev(Object *obj, const char *value, Error **errp)
     ms->ram_memdev_id = g_strdup(value);
 }
 
+static char *machine_get_default_audiodev(Object *obj, Error **errp)
+{
+    MachineState *ms = MACHINE(obj);
+
+    return g_strdup(ms->default_audiodev);
+}
+
+static void machine_set_default_audiodev(Object *obj, const char *value,
+                                         Error **errp)
+{
+    MachineState *ms = MACHINE(obj);
+
+    g_free(ms->default_audiodev);
+    ms->default_audiodev = g_strdup(value);
+}
+
 HotpluggableCPUList *machine_query_hotpluggable_cpus(MachineState *machine)
 {
     int i;
@@ -867,6 +883,12 @@ static void machine_class_init(ObjectClass *oc, void *data)
     object_class_property_set_description(oc, "confidential-guest-support",
                                           "Set confidential guest scheme to support");
 
+    object_class_property_add_str(oc, "default-audiodev",
+                                  machine_get_default_audiodev,
+                                  machine_set_default_audiodev);
+    object_class_property_set_description(oc, "default-audiodev",
+                                          "Audiodev to use for default machine devices");
+
     /* For compatibility */
     object_class_property_add_str(oc, "memory-encryption",
         machine_get_memory_encryption, machine_set_memory_encryption);
@@ -961,6 +983,7 @@ static void machine_finalize(Object *obj)
     g_free(ms->device_memory);
     g_free(ms->nvdimms_state);
     g_free(ms->numa_state);
+    g_free(ms->default_audiodev);
 }
 
 bool machine_usb(MachineState *machine)
diff --git a/include/hw/boards.h b/include/hw/boards.h
index d64b5481e834..5be1de50af03 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -346,6 +346,7 @@ struct MachineState {
      */
     MemoryRegion *ram;
     DeviceMemoryState *device_memory;
+    char *default_audiodev;
 
     ram_addr_t ram_size;
     ram_addr_t maxram_size;
-- 
2.35.1