From patchwork Sat Aug 27 20:34:14 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 663331 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 3sM8mp0sQGz9sRB for ; Sun, 28 Aug 2016 06:35:20 +1000 (AEST) Received: from localhost ([::1]:37130 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bdkJu-0003Af-NQ for incoming@patchwork.ozlabs.org; Sat, 27 Aug 2016 16:35:14 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59682) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bdkJG-0002oP-Bp for qemu-devel@nongnu.org; Sat, 27 Aug 2016 16:34:35 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bdkJC-0007w0-5H for qemu-devel@nongnu.org; Sat, 27 Aug 2016 16:34:33 -0400 Received: from mx1.redhat.com ([209.132.183.28]:60672) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bdkJB-0007vb-Vm for qemu-devel@nongnu.org; Sat, 27 Aug 2016 16:34:30 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 488D83B716 for ; Sat, 27 Aug 2016 20:34:29 +0000 (UTC) Received: from thinkpad.redhat.com (ovpn-112-16.ams2.redhat.com [10.36.112.16]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u7RKYQqX019741; Sat, 27 Aug 2016 16:34:27 -0400 From: Laurent Vivier To: qemu-devel@nongnu.org Date: Sat, 27 Aug 2016 16:34:14 -0400 Message-Id: <1472330054-22607-1-git-send-email-lvivier@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Sat, 27 Aug 2016 20:34:29 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2] tests: fix qvirtqueue_kick 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: Laurent Vivier , stefanha@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" vq->avail.idx and vq->avail->ring[] are a 16bit values, so read and write them with readw()/writew() instead of readl()/writel(). To read/write a 16bit value with a 32bit accessor works fine on little-endian CPU but not on big endian CPU. Signed-off-by: Laurent Vivier --- v2: vq->avail->ring[] is also a 16bit value tests/libqos/virtio.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tests/libqos/virtio.c b/tests/libqos/virtio.c index d8c2970..37ff860 100644 --- a/tests/libqos/virtio.c +++ b/tests/libqos/virtio.c @@ -257,16 +257,16 @@ void qvirtqueue_kick(const QVirtioBus *bus, QVirtioDevice *d, QVirtQueue *vq, uint32_t free_head) { /* vq->avail->idx */ - uint16_t idx = readl(vq->avail + 2); + uint16_t idx = readw(vq->avail + 2); /* vq->used->flags */ uint16_t flags; /* vq->used->avail_event */ uint16_t avail_event; /* vq->avail->ring[idx % vq->size] */ - writel(vq->avail + 4 + (2 * (idx % vq->size)), free_head); + writew(vq->avail + 4 + (2 * (idx % vq->size)), free_head); /* vq->avail->idx */ - writel(vq->avail + 2, idx + 1); + writew(vq->avail + 2, idx + 1); /* Must read after idx is updated */ flags = readw(vq->avail);