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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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2
include/hw/virtio/virtio.h
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@ -153,6 +153,8 @@ void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem,
void virtqueue_map(VirtQueueElement *elem);
void *virtqueue_pop(VirtQueue *vq, size_t sz);
void *qemu_get_virtqueue_element(QEMUFile *f, size_t sz);
void qemu_put_virtqueue_element(QEMUFile *f, VirtQueueElement *elem);
int virtqueue_avail_bytes(VirtQueue *vq, unsigned int in_bytes,
unsigned int out_bytes);
void virtqueue_get_avail_bytes(VirtQueue *vq, unsigned int *in_bytes,