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qemu/hw/vhost_net.h

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vhost: vhost net support This adds vhost net device support in qemu. Will be tied to tap device and virtio by following patches. Raw backend is currently missing, will be worked on/submitted separately. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-03-17 19:08:17 +08:00
#ifndef VHOST_NET_H
#define VHOST_NET_H
#include "net.h"
struct vhost_net;
typedef struct vhost_net VHostNetState;
vhost: force vhost off for non-MSI guests When MSI is off, each interrupt needs to be bounced through the io thread when it's set/cleared, so vhost-net causes more context switches and higher CPU utilization than userspace virtio which handles networking in the same thread. We'll need to fix this by adding level irq support in kvm irqfd, for now disable vhost-net in these configurations. Added a vhostforce flag to force vhost-net back on. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-02-02 04:13:42 +08:00
VHostNetState *vhost_net_init(VLANClientState *backend, int devfd, bool force);
vhost: vhost net support This adds vhost net device support in qemu. Will be tied to tap device and virtio by following patches. Raw backend is currently missing, will be worked on/submitted separately. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-03-17 19:08:17 +08:00
vhost: force vhost off for non-MSI guests When MSI is off, each interrupt needs to be bounced through the io thread when it's set/cleared, so vhost-net causes more context switches and higher CPU utilization than userspace virtio which handles networking in the same thread. We'll need to fix this by adding level irq support in kvm irqfd, for now disable vhost-net in these configurations. Added a vhostforce flag to force vhost-net back on. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-02-02 04:13:42 +08:00
bool vhost_net_query(VHostNetState *net, VirtIODevice *dev);
vhost: vhost net support This adds vhost net device support in qemu. Will be tied to tap device and virtio by following patches. Raw backend is currently missing, will be worked on/submitted separately. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-03-17 19:08:17 +08:00
int vhost_net_start(VHostNetState *net, VirtIODevice *dev);
void vhost_net_stop(VHostNetState *net, VirtIODevice *dev);
void vhost_net_cleanup(VHostNetState *net);
unsigned vhost_net_get_features(VHostNetState *net, unsigned features);
void vhost_net_ack_features(VHostNetState *net, unsigned features);
#endif