From nobody Wed Nov 12 16:42:14 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1571467624; cv=none; d=zoho.com; s=zohoarc; b=ap24xturF3GpycBhbx5XkDFuDa0aNHkopjk3wPR5mBYNFiYEa13gq7FCUEK/d+RzkZL9SE774SkVmdWIVh2GXU9IgVcHExvLnJ/a7Sg1zikOQw94Yy8n1jevyynayOCqC8quiyqmhD0XeWEkmULq4dmI+i3GPjuY86yw2Pt3IVk= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1571467624; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=m6yCNc191CsZONjFSTfv9hahLOru1hJ/EQLhUd1GP94=; b=awYGUS4kVTZ/A1dCxzvGR4TgvQVnj6LCcgB+er1JKB/lzhgA+YaNXYNUl6r+tTAXsrtY4vB2p2pjx4wAGfI4jEarEM8xY/mhUiF4oOAKWbLljJ7iJazjJpBxi+/Q7++ZGfcsY33r/drU3kmGX7GNVEIWogoLpQSiTLFgn6WjbMA= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1571467624739685.3698916346639; Fri, 18 Oct 2019 23:47:04 -0700 (PDT) Received: from localhost ([::1]:49960 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iLiVx-0002Pb-9D for importer@patchew.org; Sat, 19 Oct 2019 02:47:01 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59808) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iLiOS-0003Jv-Pg for qemu-devel@nongnu.org; Sat, 19 Oct 2019 02:39:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iLiOR-0003qP-Nl for qemu-devel@nongnu.org; Sat, 19 Oct 2019 02:39:16 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39774) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iLiOP-0003mb-ER; Sat, 19 Oct 2019 02:39:13 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id AADD158; Sat, 19 Oct 2019 06:39:11 +0000 (UTC) Received: from localhost (ovpn-116-50.ams2.redhat.com [10.36.116.50]) by smtp.corp.redhat.com (Postfix) with ESMTP id C9EE519C7F; Sat, 19 Oct 2019 06:39:01 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PATCH v3 07/16] libqos: enforce Device Initialization order Date: Sat, 19 Oct 2019 07:38:01 +0100 Message-Id: <20191019063810.6944-8-stefanha@redhat.com> In-Reply-To: <20191019063810.6944-1-stefanha@redhat.com> References: <20191019063810.6944-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Sat, 19 Oct 2019 06:39:11 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fam Zheng , Laurent Vivier , Thomas Huth , qemu-block@nongnu.org, slp@redhat.com, "Michael S. Tsirkin" , Stefan Hajnoczi , Paolo Bonzini Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" According to VIRTIO 1.1 "3.1.1 Driver Requirements: Device Initialization", configuration space and virtqueues cannot be accessed before features have been negotiated. Enforce this requirement. Signed-off-by: Stefan Hajnoczi --- tests/libqos/virtio.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/tests/libqos/virtio.c b/tests/libqos/virtio.c index 4f7e6bb8a1..2593996c98 100644 --- a/tests/libqos/virtio.c +++ b/tests/libqos/virtio.c @@ -13,23 +13,33 @@ #include "standard-headers/linux/virtio_config.h" #include "standard-headers/linux/virtio_ring.h" =20 +/* Features must be negotiated before config space or virtqueue access */ +static void check_features_negotiated(QVirtioDevice *d) +{ + g_assert_cmphex(d->features, !=3D, 0); +} + uint8_t qvirtio_config_readb(QVirtioDevice *d, uint64_t addr) { + check_features_negotiated(d); return d->bus->config_readb(d, addr); } =20 uint16_t qvirtio_config_readw(QVirtioDevice *d, uint64_t addr) { + check_features_negotiated(d); return d->bus->config_readw(d, addr); } =20 uint32_t qvirtio_config_readl(QVirtioDevice *d, uint64_t addr) { + check_features_negotiated(d); return d->bus->config_readl(d, addr); } =20 uint64_t qvirtio_config_readq(QVirtioDevice *d, uint64_t addr) { + check_features_negotiated(d); return d->bus->config_readq(d, addr); } =20 @@ -47,6 +57,7 @@ void qvirtio_set_features(QVirtioDevice *d, uint64_t feat= ures) QVirtQueue *qvirtqueue_setup(QVirtioDevice *d, QGuestAllocator *alloc, uint16_t index) { + check_features_negotiated(d); return d->bus->virtqueue_setup(d, alloc, index); } =20 --=20 2.21.0