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virtio: prepare change VMSTATE_VIRTIO_DEVICE macro

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In most cases the functions passed to VMSTATE_VIRTIO_DEVICE
only call the virtio_load and virtio_save wrappers. Some include some
pre- and post- massaging too. The massaging is better expressed
as such in the VMStateDescription.

Let us prepare for changing the semantic of the VMSTATE_VIRTIO_DEVICE
macro so that it is more similar to the other VMSTATE_*_DEVICE macros
in a sense that it is a field definition.

The preprocessor conditionals are going to be removed as soon as
every usage is converted to the new semantic.

Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Halil Pasic 2016-10-06 14:55:39 +02:00 committed by Michael S. Tsirkin
parent 0a73336d96
commit 1a665855d7
2 changed files with 37 additions and 0 deletions
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21
hw/virtio/virtio.c
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@ -1645,6 +1645,27 @@ void virtio_vmstate_save(QEMUFile *f, void *opaque, size_t size)
virtio_save(VIRTIO_DEVICE(opaque), f);
}
/* A wrapper for use as a VMState .put function */
static void virtio_device_put(QEMUFile *f, void *opaque, size_t size)
{
virtio_save(VIRTIO_DEVICE(opaque), f);
}
/* A wrapper for use as a VMState .get function */
static int virtio_device_get(QEMUFile *f, void *opaque, size_t size)
{
VirtIODevice *vdev = VIRTIO_DEVICE(opaque);
DeviceClass *dc = DEVICE_CLASS(VIRTIO_DEVICE_GET_CLASS(vdev));
return virtio_load(vdev, f, dc->vmsd->version_id);
}
const VMStateInfo virtio_vmstate_info = {
.name = "virtio",
.get = virtio_device_get,
.put = virtio_device_put,
};
static int virtio_set_features_nocheck(VirtIODevice *vdev, uint64_t val)
{
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);

16
include/hw/virtio/virtio.h
View File

@ -179,6 +179,20 @@ void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
void virtio_save(VirtIODevice *vdev, QEMUFile *f);
void virtio_vmstate_save(QEMUFile *f, void *opaque, size_t size);
extern const VMStateInfo virtio_vmstate_info;
#ifdef VMSTATE_VIRTIO_DEVICE_USE_NEW
#define VMSTATE_VIRTIO_DEVICE \
{ \
.name = "virtio", \
.info = &virtio_vmstate_info, \
.flags = VMS_SINGLE, \
}
#else
/* TODO remove conditional as soon as all users are converted */
#define VMSTATE_VIRTIO_DEVICE(devname, v, getf, putf) \
static const VMStateDescription vmstate_virtio_ ## devname = { \
.name = "virtio-" #devname , \
@ -198,6 +212,8 @@ void virtio_vmstate_save(QEMUFile *f, void *opaque, size_t size);
} \
}
#endif
int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id);
void virtio_notify_config(VirtIODevice *vdev);