From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 825B31B1EE for ; Sun, 24 Sep 2017 18:20:25 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id D5BE54DD4B; Sun, 24 Sep 2017 16:20:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com D5BE54DD4B Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=maxime.coquelin@redhat.com Received: from localhost.localdomain (ovpn-112-17.ams2.redhat.com [10.36.112.17]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4DC1C69FB8; Sun, 24 Sep 2017 16:20:22 +0000 (UTC) From: Maxime Coquelin To: dev@dpdk.org, remy.horton@intel.com, tiwei.bie@intel.com, yliu@fridaylinux.org Cc: mst@redhat.com, jfreiman@redhat.com, vkaplans@redhat.com, jasowang@redhat.com, Maxime Coquelin Date: Sun, 24 Sep 2017 18:19:13 +0200 Message-Id: <20170924161921.30010-12-maxime.coquelin@redhat.com> In-Reply-To: <20170924161921.30010-1-maxime.coquelin@redhat.com> References: <20170924161921.30010-1-maxime.coquelin@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Sun, 24 Sep 2017 16:20:25 +0000 (UTC) Subject: [dpdk-dev] [PATCH v2 11/19] vhost: introduce guest IOVA to backend VA helper 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: , X-List-Received-Date: Sun, 24 Sep 2017 16:20:25 -0000 This patch introduces vhost_iova_to_vva() function to translate guest's IO virtual addresses to backend's virtual addresses. When IOMMU is enabled, the IOTLB cache is queried to get the translation. If missing from the IOTLB cache, an IOTLB_MISS request is sent to Qemu, and IOTLB cache is queried again on IOTLB event notification. When IOMMU is disabled, the passed address is a guest's physical address, so the legacy rte_vhost_gpa_to_vva() API is used. Signed-off-by: Maxime Coquelin --- lib/librte_vhost/vhost.c | 24 ++++++++++++++++++++++++ lib/librte_vhost/vhost.h | 13 +++++++++++++ 2 files changed, 37 insertions(+) diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c index 2493a7992..6f243534e 100644 --- a/lib/librte_vhost/vhost.c +++ b/lib/librte_vhost/vhost.c @@ -47,12 +47,36 @@ #include #include #include +#include #include "iotlb.h" #include "vhost.h" +#include "vhost_user.h" struct virtio_net *vhost_devices[MAX_VHOST_DEVICE]; +uint64_t __vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq, + uint64_t iova, uint64_t size, uint8_t perm) +{ + uint64_t vva, tmp_size; + + if (unlikely(!size)) + return 0; + + tmp_size = size; + + vva = vhost_user_iotlb_cache_find(vq, iova, &tmp_size, perm); + if (tmp_size == size) + return vva; + + if (!vhost_user_iotlb_pending_miss(vq, iova + tmp_size, perm)) { + vhost_user_iotlb_pending_insert(vq, iova + tmp_size, perm); + vhost_user_iotlb_miss(dev, iova + tmp_size, perm); + } + + return 0; +} + struct virtio_net * get_device(int vid) { diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h index 8131bef9c..79351c66f 100644 --- a/lib/librte_vhost/vhost.h +++ b/lib/librte_vhost/vhost.h @@ -375,4 +375,17 @@ struct vhost_device_ops const *vhost_driver_callback_get(const char *path); */ 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); + +static __rte_always_inline uint64_t +vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq, + uint64_t iova, uint64_t size, uint8_t perm) +{ + if (!(dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))) + return rte_vhost_gpa_to_vva(dev->mem, iova); + + return __vhost_iova_to_vva(dev, vq, iova, size, perm); +} + #endif /* _VHOST_NET_CDEV_H_ */ -- 2.13.5