Commit a10f07a7 authored by Anthony Liguori's avatar Anthony Liguori
Browse files

qom: introduce root device 



This is based on Jan's suggestion for how to do unique naming.  The root device
is the root of composition.  All devices are reachable via child<> links from
this device.

Signed-off-by: default avatarAnthony Liguori <aliguori@us.ibm.com>
parent a5296ca9

Makefile.objs

+1 −1
Original line number Diff line number Diff line
@@ -278,7 +278,7 @@ hw-obj-$(CONFIG_LSI_SCSI_PCI) += lsi53c895a.o 
hw-obj-$(CONFIG_ESP) += esp.o



hw-obj-y += dma-helpers.o sysbus.o isa-bus.o

hw-obj-y += qdev-addr.o

hw-obj-y += qdev-addr.o container.o



# VGA

hw-obj-$(CONFIG_VGA_PCI) += vga-pci.o

hw/container.c

0 → 100644
+20 −0
Original line number Diff line number Diff line 
#include "sysbus.h"



static int container_initfn(SysBusDevice *dev)

{

    return 0;

}



static SysBusDeviceInfo container_info = {

    .init = container_initfn,

    .qdev.name = "container",

    .qdev.size = sizeof(SysBusDevice),

    .qdev.no_user = 1,

};



static void container_init(void)

{

    sysbus_register_withprop(&container_info);

}



device_init(container_init);

hw/qdev.c

+12 −0
Original line number Diff line number Diff line
@@ -1161,3 +1161,15 @@ void qdev_property_add_legacy(DeviceState *dev, Property *prop, 


    g_free(type);

}



DeviceState *qdev_get_root(void)

{

    static DeviceState *qdev_root;



    if (!qdev_root) {

        qdev_root = qdev_create(NULL, "container");

        qdev_init_nofail(qdev_root);

    }



    return qdev_root;

}

hw/qdev.h

+8 −0
Original line number Diff line number Diff line
@@ -482,4 +482,12 @@ const char *qdev_property_get_type(DeviceState *dev, const char *name, 
 */

void qdev_property_add_legacy(DeviceState *dev, Property *prop, Error **errp);



/**

 * @qdev_get_root - returns the root device of the composition tree

 *

 * Returns:

 *   The root of the composition tree.

 */

DeviceState *qdev_get_root(void);



#endif