From patchwork Mon Jan 23 00:55:04 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shannon Zhao X-Patchwork-Id: 92177 Delivered-To: patch@linaro.org Received: by 10.140.20.99 with SMTP id 90csp1009328qgi; Sun, 22 Jan 2017 16:57:31 -0800 (PST) X-Received: by 10.55.102.17 with SMTP id a17mr7641243qkc.277.1485133051186; Sun, 22 Jan 2017 16:57:31 -0800 (PST) Return-Path: Received: from lists.gnu.org (lists.gnu.org. [2001:4830:134:3::11]) by mx.google.com with ESMTPS id e41si9694334qte.69.2017.01.22.16.57.30 for (version=TLS1 cipher=AES128-SHA bits=128/128); Sun, 22 Jan 2017 16:57:31 -0800 (PST) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) client-ip=2001:4830:134:3::11; Authentication-Results: mx.google.com; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) smtp.mailfrom=qemu-devel-bounces+patch=linaro.org@nongnu.org Received: from localhost ([::1]:38368 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cVSwq-0000EV-VN for patch@linaro.org; Sun, 22 Jan 2017 19:57:29 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35851) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cVSvU-00085Z-01 for qemu-devel@nongnu.org; Sun, 22 Jan 2017 19:56:04 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cVSvP-0004Ps-AJ for qemu-devel@nongnu.org; Sun, 22 Jan 2017 19:56:04 -0500 Received: from szxga03-in.huawei.com ([119.145.14.66]:22278) by eggs.gnu.org with esmtps (TLS1.0:RSA_ARCFOUR_SHA1:16) (Exim 4.71) (envelope-from ) id 1cVSvO-0004P5-Ml; Sun, 22 Jan 2017 19:55:59 -0500 Received: from 172.24.1.60 (EHLO SZXEML424-HUB.china.huawei.com) ([172.24.1.60]) by szxrg03-dlp.huawei.com (MOS 4.4.3-GA FastPath queued) with ESMTP id COJ19716; Mon, 23 Jan 2017 08:55:33 +0800 (CST) Received: from HGHY1Z002260041.china.huawei.com (10.177.16.142) by SZXEML424-HUB.china.huawei.com (10.82.67.153) with Microsoft SMTP Server id 14.3.235.1; Mon, 23 Jan 2017 08:55:24 +0800 From: Shannon Zhao To: Date: Mon, 23 Jan 2017 08:55:04 +0800 Message-ID: <1485132904-17632-1-git-send-email-zhaoshenglong@huawei.com> X-Mailer: git-send-email 1.9.0.msysgit.0 MIME-Version: 1.0 X-Originating-IP: [10.177.16.142] X-CFilter-Loop: Reflected X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] [fuzzy] X-Received-From: 119.145.14.66 Subject: [Qemu-devel] [PATCH V2] virtio: Fix no interrupt when not creating msi controller 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: peter.maydell@linaro.org, qemu-arm@nongnu.org, mst@redhat.com, christoffer.dall@linaro.org, pbonzini@redhat.com Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" From: Shannon Zhao For ARM virt machine, if we use virt-2.7 which will not create ITS node, the virtio-net can not recieve interrupts so it can't get ip address through dhcp. This fixes commit 83d768b(virtio: set ISR on dataplane notifications). Signed-off-by: Shannon Zhao --- V2: Factor out a common function instead of duplicating code --- hw/virtio/virtio.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) -- 2.0.4 diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index aa4f38f..00e8f74 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -1441,6 +1441,12 @@ void virtio_notify_irqfd(VirtIODevice *vdev, VirtQueue *vq) event_notifier_set(&vq->guest_notifier); } +static void virtio_irq(VirtQueue *vq) +{ + virtio_set_isr(vq->vdev, 0x1); + virtio_notify_vector(vq->vdev, vq->vector); +} + void virtio_notify(VirtIODevice *vdev, VirtQueue *vq) { if (!virtio_should_notify(vdev, vq)) { @@ -1448,8 +1454,7 @@ void virtio_notify(VirtIODevice *vdev, VirtQueue *vq) } trace_virtio_notify(vdev, vq); - virtio_set_isr(vq->vdev, 0x1); - virtio_notify_vector(vdev, vq->vector); + virtio_irq(vq); } void virtio_notify_config(VirtIODevice *vdev) @@ -2082,7 +2087,7 @@ static void virtio_queue_guest_notifier_read(EventNotifier *n) { VirtQueue *vq = container_of(n, VirtQueue, guest_notifier); if (event_notifier_test_and_clear(n)) { - virtio_notify_vector(vq->vdev, vq->vector); + virtio_irq(vq); } }