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path: root/drivers/net/virtio/virtio_user/virtio_user_dev.c
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Diffstat (limited to 'drivers/net/virtio/virtio_user/virtio_user_dev.c')
-rw-r--r--drivers/net/virtio/virtio_user/virtio_user_dev.c31
1 files changed, 11 insertions, 20 deletions
diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c
index ff1c203..20816c9 100644
--- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
+++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
@@ -422,7 +422,7 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
dev->queue_size = queue_size;
dev->mac_specified = 0;
dev->frontend_features = 0;
- dev->unsupported_features = 0;
+ dev->unsupported_features = ~VIRTIO_USER_SUPPORTED_FEATURES;
parse_mac(dev, mac);
if (*ifname) {
@@ -458,22 +458,16 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
dev->device_features = VIRTIO_USER_SUPPORTED_FEATURES;
}
- if (!mrg_rxbuf) {
- dev->device_features &= ~(1ull << VIRTIO_NET_F_MRG_RXBUF);
+ if (!mrg_rxbuf)
dev->unsupported_features |= (1ull << VIRTIO_NET_F_MRG_RXBUF);
- }
- if (!in_order) {
- dev->device_features &= ~(1ull << VIRTIO_F_IN_ORDER);
+ if (!in_order)
dev->unsupported_features |= (1ull << VIRTIO_F_IN_ORDER);
- }
- if (dev->mac_specified) {
+ if (dev->mac_specified)
dev->frontend_features |= (1ull << VIRTIO_NET_F_MAC);
- } else {
- dev->device_features &= ~(1ull << VIRTIO_NET_F_MAC);
+ else
dev->unsupported_features |= (1ull << VIRTIO_NET_F_MAC);
- }
if (cq) {
/* device does not really need to know anything about CQ,
@@ -481,14 +475,8 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
*/
dev->frontend_features |= (1ull << VIRTIO_NET_F_CTRL_VQ);
} else {
- dev->device_features &= ~(1ull << VIRTIO_NET_F_CTRL_VQ);
- /* Also disable features depends on VIRTIO_NET_F_CTRL_VQ */
- dev->device_features &= ~(1ull << VIRTIO_NET_F_CTRL_RX);
- dev->device_features &= ~(1ull << VIRTIO_NET_F_CTRL_VLAN);
- dev->device_features &= ~(1ull << VIRTIO_NET_F_GUEST_ANNOUNCE);
- dev->device_features &= ~(1ull << VIRTIO_NET_F_MQ);
- dev->device_features &= ~(1ull << VIRTIO_NET_F_CTRL_MAC_ADDR);
dev->unsupported_features |= (1ull << VIRTIO_NET_F_CTRL_VQ);
+ /* Also disable features that depend on VIRTIO_NET_F_CTRL_VQ */
dev->unsupported_features |= (1ull << VIRTIO_NET_F_CTRL_RX);
dev->unsupported_features |= (1ull << VIRTIO_NET_F_CTRL_VLAN);
dev->unsupported_features |=
@@ -502,9 +490,12 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
if (is_vhost_user_by_type(dev->path))
dev->frontend_features |= (1ull << VIRTIO_NET_F_STATUS);
+ /*
+ * Device features =
+ * (frontend_features | backend_features) & ~unsupported_features;
+ */
dev->device_features |= dev->frontend_features;
- dev->device_features &= VIRTIO_USER_SUPPORTED_FEATURES;
- dev->unsupported_features |= ~VIRTIO_USER_SUPPORTED_FEATURES;
+ dev->device_features &= ~dev->unsupported_features;
if (rte_mem_event_callback_register(VIRTIO_USER_MEM_EVENT_CLB_NAME,
virtio_user_mem_event_cb, dev)) {