From patchwork Thu May 11 12:32:41 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Coquelin X-Patchwork-Id: 761052 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3wNszg6Rpxz9ryr for ; Thu, 11 May 2017 22:36:31 +1000 (AEST) Received: from localhost ([::1]:48039 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d8nKX-0004aU-Hz for incoming@patchwork.ozlabs.org; Thu, 11 May 2017 08:36:29 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55243) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d8nHU-0002Zm-J6 for qemu-devel@nongnu.org; Thu, 11 May 2017 08:33:22 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d8nHT-0004kb-1o for qemu-devel@nongnu.org; Thu, 11 May 2017 08:33:20 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45126) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d8nHS-0004kL-Pi for qemu-devel@nongnu.org; Thu, 11 May 2017 08:33:18 -0400 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 BF1B4C057FAD; Thu, 11 May 2017 12:33:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com BF1B4C057FAD Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=maxime.coquelin@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com BF1B4C057FAD Received: from localhost.localdomain (ovpn-112-16.ams2.redhat.com [10.36.112.16]) by smtp.corp.redhat.com (Postfix) with ESMTP id 18D086046E; Thu, 11 May 2017 12:33:14 +0000 (UTC) From: Maxime Coquelin To: mst@redhat.com, peterx@redhat.com, marcandre.lureau@gmail.com, vkaplans@redhat.com, jasowang@redhat.com, wexu@redhat.com, yuanhan.liu@linux.intel.com, qemu-devel@nongnu.org, jfreiman@redhat.com Date: Thu, 11 May 2017 14:32:41 +0200 Message-Id: <20170511123246.31308-2-maxime.coquelin@redhat.com> In-Reply-To: <20170511123246.31308-1-maxime.coquelin@redhat.com> References: <20170511123246.31308-1-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 [10.5.110.32]); Thu, 11 May 2017 12:33:17 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 1/6] vhost: propagate errors in vhost_device_iotlb_miss() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Maxime Coquelin Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Some backends might want to know when things went wrong. Signed-off-by: Maxime Coquelin --- hw/virtio/vhost.c | 15 ++++++++++----- include/hw/virtio/vhost.h | 2 +- 2 files changed, 11 insertions(+), 6 deletions(-) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 0001e60..369373a 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -971,18 +971,20 @@ static int vhost_memory_region_lookup(struct vhost_dev *hdev, return -EFAULT; } -void vhost_device_iotlb_miss(struct vhost_dev *dev, uint64_t iova, int write) +int vhost_device_iotlb_miss(struct vhost_dev *dev, uint64_t iova, int write) { IOMMUTLBEntry iotlb; uint64_t uaddr, len; + int ret = -EFAULT; rcu_read_lock(); iotlb = address_space_get_iotlb_entry(dev->vdev->dma_as, iova, write); if (iotlb.target_as != NULL) { - if (vhost_memory_region_lookup(dev, iotlb.translated_addr, - &uaddr, &len)) { + ret = vhost_memory_region_lookup(dev, iotlb.translated_addr, + &uaddr, &len); + if (ret) { error_report("Fail to lookup the translated address " "%"PRIx64, iotlb.translated_addr); goto out; @@ -991,14 +993,17 @@ void vhost_device_iotlb_miss(struct vhost_dev *dev, uint64_t iova, int write) len = MIN(iotlb.addr_mask + 1, len); iova = iova & ~iotlb.addr_mask; - if (dev->vhost_ops->vhost_update_device_iotlb(dev, iova, uaddr, - len, iotlb.perm)) { + ret = dev->vhost_ops->vhost_update_device_iotlb(dev, iova, uaddr, + len, iotlb.perm); + if (ret) { error_report("Fail to update device iotlb"); goto out; } } out: rcu_read_unlock(); + + return ret; } static int vhost_virtqueue_start(struct vhost_dev *dev, diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index a450321..467dc77 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -105,5 +105,5 @@ bool vhost_has_free_slot(void); int vhost_net_set_backend(struct vhost_dev *hdev, struct vhost_vring_file *file); -void vhost_device_iotlb_miss(struct vhost_dev *dev, uint64_t iova, int write); +int vhost_device_iotlb_miss(struct vhost_dev *dev, uint64_t iova, int write); #endif