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[PATCH 14/16] virtio-net: support queue_enable for vhost-user
From: |
Kangjie Xu |
Subject: |
[PATCH 14/16] virtio-net: support queue_enable for vhost-user |
Date: |
Mon, 18 Jul 2022 19:17:11 +0800 |
Support queue enable in vhost-user scenario. It will be called when
a vq reset operation is performed and the vq will be restared.
It should be noted that we can restart the vq when the vhost has
already started. When launching a new vhost-user device, the vhost
is not started and all vqs are not initalized until
VIRTIO_PCI_COMMON_STATUS is written. Thus, we should use vhost_started
to differentiate the two cases: vq reset and device start.
Signed-off-by: Kangjie Xu <kangjie.xu@linux.alibaba.com>
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
---
hw/net/virtio-net.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 8396e21a67..2c26e2ef73 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -544,6 +544,25 @@ static void virtio_net_queue_reset(VirtIODevice *vdev,
uint32_t queue_index)
assert(!virtio_net_get_subqueue(nc)->async_tx.elem);
}
+static void virtio_net_queue_enable(VirtIODevice *vdev, uint32_t queue_index)
+{
+ VirtIONet *n = VIRTIO_NET(vdev);
+ NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(queue_index));
+ int r;
+
+ if (!nc->peer || !vdev->vhost_started) {
+ return;
+ }
+
+ if (nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_USER) {
+ r = vhost_virtqueue_restart(vdev, nc, queue_index);
+ if (r < 0) {
+ error_report("unable to restart vhost net virtqueue: %d, "
+ "when resetting the queue", queue_index);
+ }
+ }
+}
+
static void virtio_net_reset(VirtIODevice *vdev)
{
VirtIONet *n = VIRTIO_NET(vdev);
@@ -3781,6 +3800,7 @@ static void virtio_net_class_init(ObjectClass *klass,
void *data)
vdc->bad_features = virtio_net_bad_features;
vdc->reset = virtio_net_reset;
vdc->queue_reset = virtio_net_queue_reset;
+ vdc->queue_enable = virtio_net_queue_enable;
vdc->set_status = virtio_net_set_status;
vdc->guest_notifier_mask = virtio_net_guest_notifier_mask;
vdc->guest_notifier_pending = virtio_net_guest_notifier_pending;
--
2.32.0
- Re: [PATCH 06/16] virtio-pci: support queue reset, (continued)
[PATCH 14/16] virtio-net: support queue_enable for vhost-user,
Kangjie Xu <=
[PATCH 02/16] virtio: add VIRTIO_F_RING_RESET, Kangjie Xu, 2022/07/18
Re: [PATCH 00/16] Support VIRTIO_F_RING_RESET for virtio-net and vhost-user in virtio pci, Kangjie Xu, 2022/07/24