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virtio: introduce qemu_get/put_virtqueue_element

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Move allocation to virtio functions also when loading/saving a
VirtQueueElement.  This will also let the load/save functions
keep backwards compatibility when the VirtQueueElement layout
is changed.

Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-01-31 11:28:59 +01:00 • committed by Michael S. Tsirkin
parent 51b19ebe43
commit ab281c1781
5 changed files with 23 additions and 19 deletions
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13
hw/virtio/virtio.c
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@ -576,6 +576,19 @@ void *virtqueue_pop(VirtQueue *vq, size_t sz)
return elem;
}
void *qemu_get_virtqueue_element(QEMUFile *f, size_t sz)
{
VirtQueueElement *elem = g_malloc(sz);
qemu_get_buffer(f, (uint8_t *)elem, sizeof(VirtQueueElement));
virtqueue_map(elem);
return elem;
}
void qemu_put_virtqueue_element(QEMUFile *f, VirtQueueElement *elem)
{
qemu_put_buffer(f, (uint8_t *)elem, sizeof(VirtQueueElement));
}
/* virtio device */
static void virtio_notify_vector(VirtIODevice *vdev, uint16_t vector)
{