From patchwork Thu Aug 31 09:50:21 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Coquelin X-Patchwork-Id: 28139 X-Patchwork-Delegate: yuanhan.liu@linux.intel.com Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id DACD67CF6; Thu, 31 Aug 2017 11:52:48 +0200 (CEST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id A33EE7CE7 for ; Thu, 31 Aug 2017 11:52:47 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 02DFE46289; Thu, 31 Aug 2017 09:52:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 02DFE46289 Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=maxime.coquelin@redhat.com Received: from localhost.localdomain (ovpn-112-32.ams2.redhat.com [10.36.112.32]) by smtp.corp.redhat.com (Postfix) with ESMTP id 20032841B0; Thu, 31 Aug 2017 09:52:43 +0000 (UTC) From: Maxime Coquelin To: dev@dpdk.org, yliu@fridaylinux.org, jfreiman@redhat.com, tiwei.bie@intel.com Cc: mst@redhat.com, vkaplans@redhat.com, jasowang@redhat.com, Maxime Coquelin Date: Thu, 31 Aug 2017 11:50:21 +0200 Message-Id: <20170831095023.21037-20-maxime.coquelin@redhat.com> In-Reply-To: <20170831095023.21037-1-maxime.coquelin@redhat.com> References: <20170831095023.21037-1-maxime.coquelin@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Thu, 31 Aug 2017 09:52:47 +0000 (UTC) Subject: [dpdk-dev] [PATCH 19/21] vhost: iommu: Invalidate vring in case of matching IOTLB invalidate X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" As soon as a page used by a ring is invalidated, the access_ok flag is cleared, so that processing threads try to map them again. Signed-off-by: Maxime Coquelin --- lib/librte_vhost/vhost.c | 17 +++++++++++++++++ lib/librte_vhost/vhost.h | 1 + lib/librte_vhost/vhost_user.c | 38 +++++++++++++++++++++++++++++++++----- 3 files changed, 51 insertions(+), 5 deletions(-) diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c index ed9292313..4bf22d6e2 100644 --- a/lib/librte_vhost/vhost.c +++ b/lib/librte_vhost/vhost.c @@ -261,6 +261,23 @@ vring_translate(struct virtio_net *dev, struct vhost_virtqueue *vq) return 0; } +void vring_invalidate(struct virtio_net *dev, struct vhost_virtqueue *vq) +{ + int vid = dev->vid; + + /* Ensure no thread is using the vrings */ + put_device(vid); + dev = get_device_wr(vid); + + vq->access_ok = 0; + vq->desc = NULL; + vq->avail = NULL; + vq->used = NULL; + + put_device_wr(vid); + get_device(vid); +} + static void init_vring_queue(struct virtio_net *dev, uint32_t vring_idx) { diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h index f84718ed1..98f9ccaf0 100644 --- a/lib/librte_vhost/vhost.h +++ b/lib/librte_vhost/vhost.h @@ -357,5 +357,6 @@ void vhost_backend_cleanup(struct virtio_net *dev); uint64_t vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq, uint64_t iova, uint64_t size, uint8_t perm); int vring_translate(struct virtio_net *dev, struct vhost_virtqueue *vq); +void vring_invalidate(struct virtio_net *dev, struct vhost_virtqueue *vq); #endif /* _VHOST_NET_CDEV_H_ */ diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c index 650981e2d..4df24ef82 100644 --- a/lib/librte_vhost/vhost_user.c +++ b/lib/librte_vhost/vhost_user.c @@ -351,11 +351,7 @@ vhost_user_set_vring_addr(struct virtio_net *dev, VhostUserMsg *msg) */ memcpy(&vq->ring_addrs, addr, sizeof(*addr)); - vq->desc = NULL; - vq->avail = NULL; - vq->used = NULL; - - vq->access_ok = 0; + vring_invalidate(dev, vq); return 0; } @@ -969,6 +965,35 @@ is_vring_iotlb_update(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg) } static int +is_vring_iotlb_invalidate(struct vhost_virtqueue *vq, + struct vhost_iotlb_msg *imsg) +{ + uint64_t istart, iend, vstart, vend; + + istart = imsg->iova; + iend = istart + imsg->size - 1; + + vstart = (uint64_t)vq->desc; + vend = vstart + sizeof(struct vring_desc) * vq->size - 1; + if (vstart <= iend && istart <= vend) + return 1; + + vstart = (uint64_t)vq->avail; + vend = vstart + sizeof(struct vring_avail); + vend += sizeof(uint16_t) * vq->size - 1; + if (vstart <= iend && istart <= vend) + return 1; + + vstart = (uint64_t)vq->used; + vend = vstart + sizeof(struct vring_used); + vend += sizeof(struct vring_used_elem) * vq->size - 1; + if (vstart <= iend && istart <= vend) + return 1; + + return 0; +} + +static int vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg) { struct virtio_net *dev = *pdev; @@ -998,6 +1023,9 @@ vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg) vhost_user_iotlb_cache_remove(vq, imsg->iova, imsg->size); + + if (is_vring_iotlb_invalidate(vq, imsg)) + vring_invalidate(dev, vq); } break; default: