From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by dpdk.org (Postfix) with ESMTP id 320ED1DBE; Wed, 5 Sep 2018 01:58:09 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 04 Sep 2018 16:58:08 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.53,331,1531810800"; d="scan'208";a="70363112" Received: from btwcube1.sh.intel.com ([10.67.104.194]) by orsmga007.jf.intel.com with ESMTP; 04 Sep 2018 16:56:51 -0700 From: Tiwei Bie To: maxime.coquelin@redhat.com, zhihong.wang@intel.com, dev@dpdk.org Cc: stable@dpdk.org Date: Wed, 5 Sep 2018 07:55:55 +0800 Message-Id: <20180904235555.31839-1-tiwei.bie@intel.com> X-Mailer: git-send-email 2.18.0 Subject: [dpdk-stable] [PATCH] vhost: fix vhost interrupt support X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 04 Sep 2018 23:58:11 -0000 When VIRTIO_RING_F_EVENT_IDX is negotiated, we need to update the avail event to enable the notification. Fixes: 3f8ff12821e4 ("vhost: support interrupt mode") Cc: stable@dpdk.org Signed-off-by: Tiwei Bie --- lib/librte_vhost/Makefile | 1 + lib/librte_vhost/vhost.c | 18 ++++++++++++------ lib/librte_vhost/vhost.h | 2 ++ 3 files changed, 15 insertions(+), 6 deletions(-) diff --git a/lib/librte_vhost/Makefile b/lib/librte_vhost/Makefile index de431fbb7..531cf4832 100644 --- a/lib/librte_vhost/Makefile +++ b/lib/librte_vhost/Makefile @@ -13,6 +13,7 @@ LIBABIVER := 4 CFLAGS += -DALLOW_EXPERIMENTAL_API CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR) -O3 -D_FILE_OFFSET_BITS=64 CFLAGS += -I vhost_user +CFLAGS += -fno-strict-aliasing LDLIBS += -lpthread ifeq ($(CONFIG_RTE_LIBRTE_VHOST_NUMA),y) diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c index 3c9be10a0..88b1781d5 100644 --- a/lib/librte_vhost/vhost.c +++ b/lib/librte_vhost/vhost.c @@ -646,12 +646,18 @@ rte_vhost_avail_entries(int vid, uint16_t queue_id) } static inline void -vhost_enable_notify_split(struct vhost_virtqueue *vq, int enable) +vhost_enable_notify_split(struct virtio_net *dev, + struct vhost_virtqueue *vq, int enable) { - if (enable) - vq->used->flags &= ~VRING_USED_F_NO_NOTIFY; - else - vq->used->flags |= VRING_USED_F_NO_NOTIFY; + if (!(dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))) { + if (enable) + vq->used->flags &= ~VRING_USED_F_NO_NOTIFY; + else + vq->used->flags |= VRING_USED_F_NO_NOTIFY; + } else { + if (enable) + vhost_avail_event(vq) = vq->last_avail_idx; + } } static inline void @@ -689,7 +695,7 @@ rte_vhost_enable_guest_notification(int vid, uint16_t queue_id, int enable) if (vq_is_packed(dev)) vhost_enable_notify_packed(dev, vq, enable); else - vhost_enable_notify_split(vq, enable); + vhost_enable_notify_split(dev, vq, enable); return 0; } diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h index 760a09c0d..25ffd7614 100644 --- a/lib/librte_vhost/vhost.h +++ b/lib/librte_vhost/vhost.h @@ -648,6 +648,8 @@ vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq, return __vhost_iova_to_vva(dev, vq, iova, len, perm); } +#define vhost_avail_event(vr) \ + (*(volatile uint16_t*)&(vr)->used->ring[(vr)->size]) #define vhost_used_event(vr) \ (*(volatile uint16_t*)&(vr)->avail->ring[(vr)->size]) -- 2.18.0