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[virtio] Remove queue size limit in legacy virtio

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Virtio 0.9 implementation was limited to the maximum virtqueue size of
MAX_QUEUE_NUM and the virtio-net driver would fail to initialize on hosts
exceeding this limit.

This commit lifts the restriction by allocating the queue memory based on
the actual queue size instead of using a fixed maximum. Note that virtio
1.0 still uses the MAX_QUEUE_NUM constant to cap the size (unfortunately
this functionality is not available in virtio 0.9).

Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Ladi Prosek
2016-12-16 14:07:08 +01:00
committed by Michael Brown
parent b782a56be7
commit fba3b39900
4 changed files with 44 additions and 13 deletions
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src/drivers/net/virtio-net.c
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@@ -185,6 +185,7 @@ static void virtnet_free_virtqueues ( struct net_device *netdev ) {
for ( i = 0; i < QUEUE_NB; i++ ) {
virtio_pci_unmap_capability ( &virtnet->virtqueue[i].notification );
vp_free_vq ( &virtnet->virtqueue[i] );
}
free ( virtnet->virtqueue );