net/virtio-user: support to report net status

Originally, we did not report support of VIRTIO_NET_F_STATUS.
This feature is not reported by vhost backend, instead, it
is added/removed by QEMU in virtio PCI case.

We report the support of this feature so that following patch
will depend on this feature to enable LSC interrupt.

Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>
Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>

diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c
index 8471975..6871cd4 100644 (file)
--- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
+++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
@@ -139,6 +139,7 @@ virtio_user_start_device(struct virtio_user_dev *dev)
        features &= ~(1ull << VIRTIO_NET_F_MAC);
        /* Strip VIRTIO_NET_F_CTRL_VQ, as devices do not really need to know */
        features &= ~(1ull << VIRTIO_NET_F_CTRL_VQ);
+       features &= ~(1ull << VIRTIO_NET_F_STATUS);
        ret = dev->ops->send_request(dev, VHOST_USER_SET_FEATURES, &features);
        if (ret < 0)
                goto error;
@@ -358,6 +359,9 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
                dev->device_features &= ~(1ull << VIRTIO_NET_F_CTRL_MAC_ADDR);
        }
 
+       /* The backend will not report this feature, we add it explicitly */
+       dev->device_features |= (1ull << VIRTIO_NET_F_STATUS);
+
        return 0;
 }
 

diff --git a/drivers/net/virtio/virtio_user_ethdev.c b/drivers/net/virtio/virtio_user_ethdev.c
index 9dd55fa..7da9f6f 100644 (file)
--- a/drivers/net/virtio/virtio_user_ethdev.c
+++ b/drivers/net/virtio/virtio_user_ethdev.c
@@ -135,17 +135,17 @@ virtio_user_set_features(struct virtio_hw *hw, uint64_t features)
 static uint8_t
 virtio_user_get_isr(struct virtio_hw *hw __rte_unused)
 {
-       /* When config interrupt happens, driver calls this function to query
-        * what kinds of change happen. Interrupt mode not supported for now.
+       /* rxq interrupts and config interrupt are separated in virtio-user,
+        * here we only report config change.
         */
-       return 0;
+       return VIRTIO_PCI_ISR_CONFIG;
 }
 
 static uint16_t
 virtio_user_set_config_irq(struct virtio_hw *hw __rte_unused,
                    uint16_t vec __rte_unused)
 {
-       return VIRTIO_MSI_NO_VECTOR;
+       return 0;
 }
 
 static uint16_t