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vhost-user: add multi queue support

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Based on patch by Nikolay Nikolaev:
Vhost-user will implement the multi queue support in a similar way
to what vhost already has - a separate thread for each queue.
To enable the multi queue functionality - a new command line parameter
"queues" is introduced for the vhost-user netdev.

Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Ouyang Changchun 2015-05-28 09:23:06 +08:00 • committed by Michael S. Tsirkin
parent 019a3edbb2
commit 830d70db69
6 changed files with 49 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

11
hw/virtio/vhost-user.c
View file

@ -210,7 +210,12 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
break;
case VHOST_SET_OWNER:
break;
case VHOST_RESET_OWNER:
memcpy(&msg.state, arg, sizeof(struct vhost_vring_state));
msg.state.index += dev->vq_index;
msg.size = sizeof(m.state);
break;
case VHOST_SET_MEM_TABLE:
@ -253,17 +258,20 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
case VHOST_SET_VRING_NUM:
case VHOST_SET_VRING_BASE:
memcpy(&msg.state, arg, sizeof(struct vhost_vring_state));
msg.state.index += dev->vq_index;
msg.size = sizeof(m.state);
break;
case VHOST_GET_VRING_BASE:
memcpy(&msg.state, arg, sizeof(struct vhost_vring_state));
msg.state.index += dev->vq_index;
msg.size = sizeof(m.state);
need_reply = 1;
break;
case VHOST_SET_VRING_ADDR:
memcpy(&msg.addr, arg, sizeof(struct vhost_vring_addr));
msg.addr.index += dev->vq_index;
msg.size = sizeof(m.addr);
break;
@ -271,7 +279,7 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
case VHOST_SET_VRING_CALL:
case VHOST_SET_VRING_ERR:
file = arg;
msg.u64 = file->index & VHOST_USER_VRING_IDX_MASK;
msg.u64 = (file->index + dev->vq_index) & VHOST_USER_VRING_IDX_MASK;
msg.size = sizeof(m.u64);
if (ioeventfd_enabled() && file->fd > 0) {
fds[fd_num++] = file->fd;
@ -313,6 +321,7 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
error_report("Received bad msg size.");
return -1;
}
msg.state.index -= dev->vq_index;
memcpy(arg, &msg.state, sizeof(struct vhost_vring_state));
break;
default: