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xen: introduce dummy system device 

Introduce a new dummy system device serving as parent for virtual
buses. This will enable new pv backends to introduce virtual buses
which are removable again opposed to system buses which are meant
to stay once added.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Message-id: 1463062421-613-2-git-send-email-jgross@suse.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
master
Juergen Gross 2016-05-12 16:13:39 +02:00 committed by Gerd Hoffmann
parent e081c24d30
commit 9432e53a5b
2 changed files with 41 additions and 0 deletions
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40
hw/xenpv/xen_machine_pv.c
View File

@ -25,10 +25,15 @@
#include "qemu/osdep.h"
#include "hw/hw.h"
#include "hw/boards.h"
#include "hw/sysbus.h"
#include "hw/xen/xen_backend.h"
#include "xen_domainbuild.h"
#include "sysemu/block-backend.h"
#define TYPE_XENSYSDEV "xensysdev"
DeviceState *xen_sysdev;
static void xen_init_pv(MachineState *machine)
{
DriveInfo *dinfo;
@ -67,6 +72,9 @@ static void xen_init_pv(MachineState *machine)
break;
}
xen_sysdev = qdev_create(NULL, TYPE_XENSYSDEV);
qdev_init_nofail(xen_sysdev);
xen_be_register("console", &xen_console_ops);
xen_be_register("vkbd", &xen_kbdmouse_ops);
xen_be_register("vfb", &xen_framebuffer_ops);
@ -101,6 +109,38 @@ static void xen_init_pv(MachineState *machine)
xen_init_display(xen_domid);
}
static int xen_sysdev_init(SysBusDevice *dev)
{
return 0;
}
static Property xen_sysdev_properties[] = {
{/* end of property list */},
};
static void xen_sysdev_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = xen_sysdev_init;
dc->props = xen_sysdev_properties;
}
static const TypeInfo xensysdev_info = {
.name = TYPE_XENSYSDEV,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SysBusDevice),
.class_init = xen_sysdev_class_init,
};
static void xenpv_register_types(void)
{
type_register_static(&xensysdev_info);
}
type_init(xenpv_register_types);
static void xenpv_machine_init(MachineClass *mc)
{
mc->desc = "Xen Para-virtualized PC";

1
include/hw/xen/xen_backend.h
View File

@ -60,6 +60,7 @@ extern xc_interface *xen_xc;
extern xenforeignmemory_handle *xen_fmem;
extern struct xs_handle *xenstore;
extern const char *xen_protocol;
extern DeviceState *xen_sysdev;
/* xenstore helper functions */
int xenstore_write_str(const char *base, const char *node, const char *val);