[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH V3 23/44] virtio-balloon: add the virtio-balloon dev
From: |
fred . konrad |
Subject: |
[Qemu-devel] [PATCH V3 23/44] virtio-balloon: add the virtio-balloon device. |
Date: |
Tue, 15 Jan 2013 15:09:37 +0100 |
From: KONRAD Frederic <address@hidden>
Create virtio-balloon which extends virtio-device, so it can be connected on
virtio-bus.
Signed-off-by: KONRAD Frederic <address@hidden>
---
hw/virtio-balloon.c | 94 +++++++++++++++++++++++++++++++++++++++++++++++++----
hw/virtio-balloon.h | 4 +++
2 files changed, 92 insertions(+), 6 deletions(-)
diff --git a/hw/virtio-balloon.c b/hw/virtio-balloon.c
index 3ea1790..c189bee 100644
--- a/hw/virtio-balloon.c
+++ b/hw/virtio-balloon.c
@@ -27,6 +27,11 @@
#include <sys/mman.h>
#endif
+#include "virtio-bus.h"
+
+/*
+ * Will be modified later in the serie.
+ */
static VirtIOBalloon *to_virtio_balloon(VirtIODevice *vdev)
{
return (VirtIOBalloon *)vdev;
@@ -219,14 +224,27 @@ static int virtio_balloon_load(QEMUFile *f, void *opaque,
int version_id)
return 0;
}
-VirtIODevice *virtio_balloon_init(DeviceState *dev)
+static VirtIODevice *virtio_balloon_common_init(DeviceState *dev,
+ VirtIOBalloon **ps)
{
- VirtIOBalloon *s;
+ VirtIOBalloon *s = *ps;
int ret;
- s = (VirtIOBalloon *)virtio_common_init("virtio-balloon",
- VIRTIO_ID_BALLOON,
- 8, sizeof(VirtIOBalloon));
+ /*
+ * We have two cases here: the old virtio-balloon-x device, and the
+ * refactored virtio-balloon.
+ * This will disappear later in the serie.
+ */
+ int old_device = (s == NULL);
+ if (s == NULL) {
+ /* old virtio-balloon-pci or virtio-balloon-s390, no memory allocated
*/
+ s = (VirtIOBalloon *)virtio_common_init("virtio-balloon",
+ VIRTIO_ID_BALLOON,
+ 8, sizeof(VirtIOBalloon));
+ } else {
+ /* new API virtio-balloon. (memory allocated by qdev) */
+ virtio_init(VIRTIO_DEVICE(s), "virtio-balloon", VIRTIO_ID_BALLOON, 8);
+ }
s->vdev.get_config = virtio_balloon_get_config;
s->vdev.set_config = virtio_balloon_set_config;
@@ -234,10 +252,14 @@ VirtIODevice *virtio_balloon_init(DeviceState *dev)
ret = qemu_add_balloon_handler(virtio_balloon_to_target,
virtio_balloon_stat, s);
- if (ret < 0) {
+ if ((ret < 0) && (old_device)) {
virtio_cleanup(&s->vdev);
return NULL;
}
+ if (ret < 0) {
+ virtio_common_cleanup(VIRTIO_DEVICE(s));
+ return NULL;
+ }
s->ivq = virtio_add_queue(&s->vdev, 128, virtio_balloon_handle_output);
s->dvq = virtio_add_queue(&s->vdev, 128, virtio_balloon_handle_output);
@@ -252,6 +274,15 @@ VirtIODevice *virtio_balloon_init(DeviceState *dev)
return &s->vdev;
}
+/*
+ * This two functions will be removed later in the serie.
+ */
+VirtIODevice *virtio_balloon_init(DeviceState *dev)
+{
+ VirtIOBalloon *s = NULL;
+ return virtio_balloon_common_init(dev, &s);
+}
+
void virtio_balloon_exit(VirtIODevice *vdev)
{
VirtIOBalloon *s = DO_UPCAST(VirtIOBalloon, vdev, vdev);
@@ -260,3 +291,54 @@ void virtio_balloon_exit(VirtIODevice *vdev)
unregister_savevm(s->qdev, "virtio-balloon", s);
virtio_cleanup(vdev);
}
+
+static int virtio_balloon_device_init(VirtIODevice *vdev)
+{
+ DeviceState *qdev = DEVICE(vdev);
+ VirtIOBalloon *s = VIRTIO_BALLOON(vdev);
+ if (virtio_balloon_common_init(qdev, &s) == NULL) {
+ return -1;
+ }
+ return 0;
+}
+
+static int virtio_balloon_device_exit(DeviceState *qdev)
+{
+ VirtIOBalloon *s = VIRTIO_BALLOON(qdev);
+ VirtIODevice *vdev = VIRTIO_DEVICE(qdev);
+
+ qemu_remove_balloon_handler(s);
+ unregister_savevm(qdev, "virtio-balloon", s);
+ virtio_common_cleanup(vdev);
+ return 0;
+}
+
+static Property virtio_balloon_properties[] = {
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_balloon_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
+ dc->exit = virtio_balloon_device_exit;
+ dc->props = virtio_balloon_properties;
+ vdc->init = virtio_balloon_device_init;
+ vdc->get_config = virtio_balloon_get_config;
+ vdc->set_config = virtio_balloon_set_config;
+ vdc->get_features = virtio_balloon_get_features;
+}
+
+static const TypeInfo virtio_balloon_info = {
+ .name = TYPE_VIRTIO_BALLOON,
+ .parent = TYPE_VIRTIO_DEVICE,
+ .instance_size = sizeof(VirtIOBalloon),
+ .class_init = virtio_balloon_class_init,
+};
+
+static void virtio_register_types(void)
+{
+ type_register_static(&virtio_balloon_info);
+}
+
+type_init(virtio_register_types)
diff --git a/hw/virtio-balloon.h b/hw/virtio-balloon.h
index 0cd211e..c106026 100644
--- a/hw/virtio-balloon.h
+++ b/hw/virtio-balloon.h
@@ -18,6 +18,10 @@
#include "virtio.h"
#include "pci/pci.h"
+#define TYPE_VIRTIO_BALLOON "virtio-balloon"
+#define VIRTIO_BALLOON(obj) \
+ OBJECT_CHECK(VirtIOBalloon, (obj), TYPE_VIRTIO_BALLOON)
+
/* from Linux's linux/virtio_balloon.h */
/* The ID for virtio_balloon */
--
1.7.11.7
- [Qemu-devel] [PATCH V3 26/44] virtio-balloon: cleanup: QOM casts., (continued)
- [Qemu-devel] [PATCH V3 26/44] virtio-balloon: cleanup: QOM casts., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 34/44] virtio-rng.c: cleanup: use QOM casts., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 27/44] virtio-balloon: cleanup: remove qdev field., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 29/44] virtio-rng: add virtio-rng device., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 42/44] virtio-9p-pci: switch to the new API., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 21/44] virtio-scsi: cleanup: init and exit functions., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 30/44] virtio-rng-s390: switch to the new API., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 35/44] virtio-serial: add the virtio-serial device., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 43/44] virtio-9p: cleanup: init function., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 24/44] virtio-balloon-pci: switch to the new API., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 23/44] virtio-balloon: add the virtio-balloon device.,
fred . konrad <=
- [Qemu-devel] [PATCH V3 28/44] virtio-rng: don't use pointer for configuration., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 25/44] virtio-balloon: cleanup: init and exit function., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 16/44] virtio-scsi: moving host_features from properties to transport properties., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 37/44] virtio-serial-s390: switch to the new API., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 38/44] virtio-serial: cleanup: init and exit functions., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 17/44] virtio-scsi: add the virtio-scsi device., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 31/44] virtio-rng-pci: switch to the new API., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 22/44] virtio-scsi: cleanup: remove qdev field., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 40/44] virtio-serial: cleanup: remove qdev field., fred . konrad, 2013/01/15
- [Qemu-devel] [PATCH V3 20/44] virtio-scsi: cleanup: use QOM casts., fred . konrad, 2013/01/15