svq_switching indicates the case where SVQ mode change
is on going. Positive (1) means switching from the
normal passthrough mode to SVQ mode, and negative (-1)
meaning switch SVQ back to the passthrough; zero (0)
indicates that there's no SVQ mode switch taking place.
Signed-off-by: Si-Wei Liu <si-wei....@oracle.com>
---
net/vhost-vdpa.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 7b8f047..04718b2 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -320,6 +320,7 @@ static void vhost_vdpa_net_log_global_enable(VhostVDPAState
*s, bool enable)
data_queue_pairs = n->multiqueue ? n->max_queue_pairs : 1;
cvq = virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ) ?
n->max_ncs - n->max_queue_pairs : 0;
+ v->shared->svq_switching = enable ? 1 : -1;
/*
* TODO: vhost_net_stop does suspend, get_base and reset. We can be smarter
* in the future and resume the device if read-only operations between
@@ -332,6 +333,7 @@ static void vhost_vdpa_net_log_global_enable(VhostVDPAState
*s, bool enable)
if (unlikely(r < 0)) {
error_report("unable to start vhost net: %s(%d)", g_strerror(-r), -r);
}
+ v->shared->svq_switching = 0;
}
static void vdpa_net_migration_state_notifier(Notifier *notifier, void *data)
--
1.8.3.1
