vhost: supported features

VHOST_SUPPORTED_FEATURES is the feature mask that vhost lib supports.
VHOST_FEATURES is the feature mask vhost currently supports after some features are turned on/off.

Signed-off-by: Huawei Xie <huawei.xie@intel.com>
Acked-by: Changchun Ouyang <changchun.ouyang@intel.com>
[Thomas: split patch]

diff --git a/lib/librte_vhost/virtio-net.c b/lib/librte_vhost/virtio-net.c
index de505c5..127270c 100644 (file)
--- a/lib/librte_vhost/virtio-net.c
+++ b/lib/librte_vhost/virtio-net.c
@@ -68,8 +68,9 @@ static struct virtio_net_device_ops const * notify_ops;
 /* Root address of the linked list in the configuration core. */
 static struct virtio_net_config_ll                     *ll_root = NULL;
 
-/* Features supported by this application. RX merge buffers are disabled by default. */
-uint64_t VHOST_FEATURES = (0ULL << VIRTIO_NET_F_MRG_RXBUF);
+/* Features supported by this application. RX merge buffers are enabled by default. */
+#define VHOST_SUPPORTED_FEATURES (1ULL << VIRTIO_NET_F_MRG_RXBUF)
+static uint64_t VHOST_FEATURES = VHOST_SUPPORTED_FEATURES;
 
 /* Line size for reading maps file. */
 const uint32_t BUFSIZE = PATH_MAX;