[Qemu-devel] [PATCH 1/5] qdev: introduce qdev_create_kid(Object *parent, const char *type)

[Liu Ping Fan <qemulist@gmail.com>]

DeviceState can be created as kid of DeviceState/CPUState, not neccesary
attached to bus. This will be helpful to simulate the real hardware
submodule which sits inside package.

Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com>
---
 hw/qdev.c |   28 ++++++++++++++++++++++++++++
 hw/qdev.h |    1 +
 2 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/hw/qdev.c b/hw/qdev.c
index af54467..d2100a1 100644
--- a/hw/qdev.c
+++ b/hw/qdev.c
@@ -26,6 +26,7 @@
    this API directly.  */
 
 #include "net.h"
+#include "qemu/cpu.h"
 #include "qdev.h"
 #include "sysemu.h"
 #include "error.h"
@@ -145,6 +146,33 @@ DeviceState *qdev_try_create(BusState *bus, const char *type)
     return dev;
 }
 
+DeviceState *qdev_create_kid(Object *parent, const char *type)
+{
+    DeviceState *dev;
+    assert(parent);
+
+    if (object_class_by_name(type) == NULL) {
+        return NULL;
+    }
+
+    if (object_is_type_str(parent, TYPE_BUS)) {
+        return qdev_create(BUS(parent), type);
+    }
+
+    if (!object_is_type_str(parent, TYPE_DEVICE)
+        || !object_is_type_str(parent, TYPE_CPU)) {
+        return NULL;
+    }
+
+    dev = DEVICE(object_new(type));
+    if (!dev) {
+        return NULL;
+    }
+    object_property_add_child(OBJECT(parent), type, OBJECT(dev), NULL);
+
+    return dev;
+}
+
 /* Initialize a device.  Device properties should be set before calling
    this function.  IRQs and MMIO regions should be connected/mapped after
    calling this function.
diff --git a/hw/qdev.h b/hw/qdev.h
index f4683dc..aecc69e 100644
--- a/hw/qdev.h
+++ b/hw/qdev.h
@@ -154,6 +154,7 @@ typedef struct GlobalProperty {
 
 DeviceState *qdev_create(BusState *bus, const char *name);
 DeviceState *qdev_try_create(BusState *bus, const char *name);
+DeviceState *qdev_create_kid(Object *parent, const char *type);
 bool qdev_exists(const char *name);
 int qdev_device_help(QemuOpts *opts);
 DeviceState *qdev_device_add(QemuOpts *opts);
-- 
1.7.4.4