From nobody Tue Feb 10 21:40:52 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; 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 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1505729851080221.7759809712228; Mon, 18 Sep 2017 03:17:31 -0700 (PDT) Received: from localhost ([::1]:35584 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dtt7K-0005f1-5m for importer@patchew.org; Mon, 18 Sep 2017 06:17:30 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40966) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dtt4d-0003NZ-Ck for qemu-devel@nongnu.org; Mon, 18 Sep 2017 06:14:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dtt4c-0002sM-Hp for qemu-devel@nongnu.org; Mon, 18 Sep 2017 06:14:43 -0400 Received: from mx1.redhat.com ([209.132.183.28]:44332) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dtt4c-0002sG-Cl for qemu-devel@nongnu.org; Mon, 18 Sep 2017 06:14:42 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7BDE3C0587D4 for ; Mon, 18 Sep 2017 10:14:41 +0000 (UTC) Received: from mmorsy.remote.csb (unknown [10.40.205.53]) by smtp.corp.redhat.com (Postfix) with ESMTP id 247265D6A8; Mon, 18 Sep 2017 10:14:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 7BDE3C0587D4 Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=mgamal@redhat.com From: Mohammed Gamal To: qemu-devel@nongnu.org Date: Mon, 18 Sep 2017 12:14:09 +0200 Message-Id: <1505729649-11943-3-git-send-email-mgamal@redhat.com> In-Reply-To: <1505729649-11943-1-git-send-email-mgamal@redhat.com> References: <1505729649-11943-1-git-send-email-mgamal@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Mon, 18 Sep 2017 10:14:41 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v3 2/2] x86_iommu: check if machine has PCI bus 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: thuth@redhat.com, ehabkost@redhat.com, mst@redhat.com, peterx@redhat.com, pbonzini@redhat.com, Mohammed Gamal Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Starting qemu with qemu-system-x86_64 -S -M isapc -device {amd|intel}-iommu leads to a segfault. The code assume PCI bus is present and tries to access the bus structure without checking. Since Intel VT-d and AMDVI should only work with PCI, add a check for PCI bus and return error if not present. Signed-off-by: Mohammed Gamal --- hw/i386/x86-iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c index d43b08a..00f70bb 100644 --- a/hw/i386/x86-iommu.c +++ b/hw/i386/x86-iommu.c @@ -87,7 +87,7 @@ static void x86_iommu_realize(DeviceState *dev, Error **e= rrp) PCMachineState *pcms =3D PC_MACHINE(ms); QLIST_INIT(&x86_iommu->iec_notifiers); =20 - if (!pcms) { + if (!pcms || !pcms->bus) { error_setg(errp, "Machine-type '%s' not supported by IOMMU", mc->name); return; --=20 1.8.3.1