On 01/09/2018 12:03 PM, Junjie Chen wrote:
The driver can suppress interrupt when VIRTIO_F_EVENT_IDX feature bit is negotiated. The driver set vring flags to 0, and MAY use used_event in available ring to advise device interrupt util reach an index specified by used_event. The device ignore the lower bit of vring flags, and send an interrupt when index reach used_event. The device can suppress notification in a manner analogous to the ways driver suppress interrupt. The device manipulates flags or avail_event in the used ring in the same way the driver manipulates flags or used_event in available ring. Signed-off-by: Junjie Chen<junjie.j.c...@intel.com> --- v7: Add vhost_need_event definition and update code for next virtio. v6: Use volatile qualifier to access avail event idx. v5: Remove updating avail event index in backend. v2-v4: Use definition of VIRTIO_F_EVENT_IDX from kernel. lib/librte_vhost/vhost.c | 2 +- lib/librte_vhost/vhost.h | 44 ++++++++++++++++++++++++++++++++++++++----- lib/librte_vhost/virtio_net.c | 6 +++--- 3 files changed, 43 insertions(+), 9 deletions(-)
Reviewed-by: Maxime Coquelin <maxime.coque...@redhat.com> Thanks, Maxime
