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 98D25A053A; Tue, 4 Aug 2020 09:25:30 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id B979D1C042; Tue, 4 Aug 2020 09:24:56 +0200 (CEST) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [205.139.110.120]) by dpdk.org (Postfix) with ESMTP id 9FFF81C036 for ; Tue, 4 Aug 2020 09:24:55 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1596525895; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=SEKOofi4qCm27Ivd9+Wz9xJhMN+2baE5fdKBe1wXMxw=; b=ES0fTWaCz6PjINOs8WjBdQlmtb8DXx/g6HtZs8GprYxXHShg7RUwNktaXFsYzSirTIYT+R 9UMYhgrWQSo+TLLf3I/Fhi19niU4ln25Yed4+nBjg6uejTs4g8mdumRrDOkPXntQVpic1e y680IGeTu6s8fcnqosznKe47Dex8W+M= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-30-IsD491aNM_K0bfgWM8JYdw-1; Tue, 04 Aug 2020 03:24:53 -0400 X-MC-Unique: IsD491aNM_K0bfgWM8JYdw-1 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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id 525FB1005510; Tue, 4 Aug 2020 07:24:52 +0000 (UTC) Received: from amorenoz.users.ipa.redhat.com (ovpn-113-91.ams2.redhat.com [10.36.113.91]) by smtp.corp.redhat.com (Postfix) with ESMTP id D54927852C; Tue, 4 Aug 2020 07:24:50 +0000 (UTC) From: Adrian Moreno To: dev@dpdk.org Cc: zhihong.wang@intel.com, chenbo.xia@intel.com, maxime.coquelin@redhat.com, Adrian Moreno Date: Tue, 4 Aug 2020 09:24:31 +0200 Message-Id: <20200804072431.86441-5-amorenoz@redhat.com> In-Reply-To: <20200804072431.86441-1-amorenoz@redhat.com> References: <20200804072431.86441-1-amorenoz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=amorenoz@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH v2 4/4] net/virtio: enable feature checking on virtio-user 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" virtio 1.0 introduced a mechanism for the driver to verify that the feature bits it sets are accepted by the device. This mechanism consists in setting the VIRTIO_STATUS_FEATURE_OK status bit and re-reading it, whitch gives a chance for the device to clear it if the the features were not accepted. This is currently being done only in modern virtio-pci devices but since the appropriate vhost-user messages have been added, it can also be done in virtio-user (vhost-user only). This patch activates this mechanism on virtio-user. Signed-off-by: Adrian Moreno --- drivers/net/virtio/virtio_ethdev.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c index dc0093bdf..9063bfeb2 100644 --- a/drivers/net/virtio/virtio_ethdev.c +++ b/drivers/net/virtio/virtio_ethdev.c @@ -1355,12 +1355,13 @@ virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features) PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64, hw->guest_features); - if (hw->modern) { - if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) { - PMD_INIT_LOG(ERR, - "VIRTIO_F_VERSION_1 features is not enabled."); - return -1; - } + if (hw->modern && !vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) { + PMD_INIT_LOG(ERR, + "VIRTIO_F_VERSION_1 features is not enabled."); + return -1; + } + + if (hw->modern || hw->virtio_user_dev) { vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK); if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) { PMD_INIT_LOG(ERR, -- 2.26.2