From nobody Mon Apr 29 02:16:34 2024 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 1505420555119427.33502589547584; Thu, 14 Sep 2017 13:22:35 -0700 (PDT) Received: from localhost ([::1]:49886 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dsaeg-0006bk-4m for importer@patchew.org; Thu, 14 Sep 2017 16:22:34 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41123) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dsaA0-0006oh-Cu for qemu-devel@nongnu.org; Thu, 14 Sep 2017 15:50:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dsa9v-0008AM-B9 for qemu-devel@nongnu.org; Thu, 14 Sep 2017 15:50:52 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43062) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dsa9u-00089a-So for qemu-devel@nongnu.org; Thu, 14 Sep 2017 15:50:47 -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 17BA8883AE for ; Thu, 14 Sep 2017 19:50:45 +0000 (UTC) Received: from mmorsy.remote.csb (ovpn-204-57.brq.redhat.com [10.40.204.57]) by smtp.corp.redhat.com (Postfix) with ESMTP id B7C535D75C; Thu, 14 Sep 2017 19:50:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 17BA8883AE Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=mgamal@redhat.com From: Mohammed Gamal To: qemu-devel@nongnu.org Date: Thu, 14 Sep 2017 21:50:19 +0200 Message-Id: <1505418619-16284-1-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 [10.5.110.26]); Thu, 14 Sep 2017 19:50:45 +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 X-Mailman-Approved-At: Thu, 14 Sep 2017 16:21:00 -0400 Subject: [Qemu-devel] [PATCH] amd_iommu: Return error on machines with no PCI 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: pbonzini@redhat.com, thuth@redhat.com, Mohammed Gamal , ehabkost@redhat.com, mst@redhat.com 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 the following command line causes a segfault qemu-system-x86_64 -S -machine isapc,accel=3Dkvm -device amd-iommu This is due to the fact that the machine type 'isapc' doesn't have a PCI bus, while amd_iommu doesn't check if the machine has PCI support and subsequently does a null-pointer access. AMD IOMMU shouldn't even work if the target machine doesn't have PCI. Add a check for PCI on the given machine type and return an error if PCI is not supported. Signed-off-by: Mohammed Gamal --- hw/i386/amd_iommu.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c index 334938a..9a667b7 100644 --- a/hw/i386/amd_iommu.c +++ b/hw/i386/amd_iommu.c @@ -1153,6 +1153,13 @@ static void amdvi_realize(DeviceState *dev, Error **= err) } =20 bus =3D pcms->bus; + + if (!bus) { + error_setg(err, "Machine-type '%s' does not support PCI", + mc->name); + return; + } + s->iotlb =3D g_hash_table_new_full(amdvi_uint64_hash, amdvi_uint64_equal, g_free, g_free); =20 --=20 1.8.3.1