From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 4E80BA2E1B for ; Tue, 3 Sep 2019 09:37:03 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id E4CA11E871; Tue, 3 Sep 2019 09:37:02 +0200 (CEST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 708F91C43C; Tue, 3 Sep 2019 09:37:01 +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 B1C8B85360; Tue, 3 Sep 2019 07:37:00 +0000 (UTC) Received: from [10.36.112.25] (ovpn-112-25.ams2.redhat.com [10.36.112.25]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 759EE6012A; Tue, 3 Sep 2019 07:36:56 +0000 (UTC) To: Tiwei Bie Cc: zhihong.wang@intel.com, amorenoz@redhat.com, xiao.w.wang@intel.com, dev@dpdk.org, jfreimann@redhat.com, stable@dpdk.org References: <20190829080000.20806-1-maxime.coquelin@redhat.com> <20190829080000.20806-15-maxime.coquelin@redhat.com> <20190903050237.GA26808@___> From: Maxime Coquelin Openpgp: preference=signencrypt Autocrypt: addr=maxime.coquelin@redhat.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190903050237.GA26808@___> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit 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 [10.5.110.25]); Tue, 03 Sep 2019 07:37:00 +0000 (UTC) Subject: Re: [dpdk-dev] [PATCH 14/15] net/virtio: add vDPA op to get notification area 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" On 9/3/19 7:02 AM, Tiwei Bie wrote: > On Thu, Aug 29, 2019 at 09:59:59AM +0200, Maxime Coquelin wrote: >> This patch implements the vDPA .get_notify_area() >> callback. >> >> Signed-off-by: Maxime Coquelin >> --- >> drivers/net/virtio/virtio_vdpa.c | 33 ++++++++++++++++++++++++++++++++ >> 1 file changed, 33 insertions(+) >> >> diff --git a/drivers/net/virtio/virtio_vdpa.c b/drivers/net/virtio/virtio_vdpa.c >> index e0b2f99ba..e681f527a 100644 >> --- a/drivers/net/virtio/virtio_vdpa.c >> +++ b/drivers/net/virtio/virtio_vdpa.c >> @@ -707,6 +707,38 @@ virtio_vdpa_get_vfio_device_fd(int vid) >> return list->dev->vfio_dev_fd; >> } >> >> +static int >> +virtio_vdpa_get_notify_area(int vid, int qid, uint64_t *offset, uint64_t *size) >> +{ >> + int did; >> + struct internal_list *list; >> + struct virtio_vdpa_device *dev; >> + struct vfio_region_info reg = { .argsz = sizeof(reg) }; >> + int ret; >> + >> + did = rte_vhost_get_vdpa_device_id(vid); >> + list = find_internal_resource_by_did(did); >> + if (list == NULL) { >> + DRV_LOG(ERR, "Invalid device id: %d", did); >> + return -1; >> + } >> + >> + dev = list->dev; >> + >> + reg.index = dev->hw.notify_region; >> + ret = ioctl(dev->vfio_dev_fd, VFIO_DEVICE_GET_REGION_INFO, ®); >> + if (ret) { >> + DRV_LOG(ERR, "Get not get device region info: %s", >> + strerror(errno)); >> + return -1; >> + } >> + >> + *offset = dev->vqs[qid].notify_addr - dev->hw.notify_base + reg.offset; >> + *size = 0x1000; > > It would be better to check whether the size is no less > than 0x1000, otherwise it's possible to give guest the > access to other registers of the vdpa device. Correct, if offset is not page-aligned, then it would mean one page may be mapped while not needed. I took the ifcvf driver as example and forgot to fix it. (Maybe it should also be fixed in ifcvf driver?) Thanks, Maxime > Regards, > Tiwei > >> + >> + return 0; >> +} >> + >> static struct rte_vdpa_dev_ops virtio_vdpa_ops = { >> .get_queue_num = virtio_vdpa_get_queue_num, >> .get_features = virtio_vdpa_get_features, >> @@ -716,6 +748,7 @@ static struct rte_vdpa_dev_ops virtio_vdpa_ops = { >> .set_features = virtio_vdpa_set_features, >> .get_vfio_group_fd = virtio_vdpa_get_vfio_group_fd, >> .get_vfio_device_fd = virtio_vdpa_get_vfio_device_fd, >> + .get_notify_area = virtio_vdpa_get_notify_area, >> }; >> >> static inline int >> -- >> 2.21.0 >>