From nobody Sun Feb 8 21:29:26 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.zoho.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 1490053360501514.2032294375927; Mon, 20 Mar 2017 16:42:40 -0700 (PDT) Received: from localhost ([::1]:35660 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cq6wh-0003vM-5f for importer@patchew.org; Mon, 20 Mar 2017 19:42:39 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41536) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cq6Qx-0001xo-77 for qemu-devel@nongnu.org; Mon, 20 Mar 2017 19:10:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cq6Qr-0005AG-8V for qemu-devel@nongnu.org; Mon, 20 Mar 2017 19:09:51 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:44769) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cq6Qq-00058r-Tu for qemu-devel@nongnu.org; Mon, 20 Mar 2017 19:09:45 -0400 Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v2KN8X6S109608 for ; Mon, 20 Mar 2017 19:09:43 -0400 Received: from e13.ny.us.ibm.com (e13.ny.us.ibm.com [129.33.205.203]) by mx0a-001b2d01.pphosted.com with ESMTP id 29ak40pc7w-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 20 Mar 2017 19:09:43 -0400 Received: from localhost by e13.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Mon, 20 Mar 2017 19:09:40 -0400 Received: from b01ledav005.gho.pok.ibm.com (b01ledav005.gho.pok.ibm.com [9.57.199.110]) by b01cxnp23032.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v2KN9dTk40829080; Mon, 20 Mar 2017 23:09:39 GMT Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 885FCAE04E; Mon, 20 Mar 2017 19:09:31 -0400 (EDT) Received: from localhost (unknown [9.53.92.194]) by b01ledav005.gho.pok.ibm.com (Postfix) with ESMTP id 7749CAE04B; Mon, 20 Mar 2017 19:09:31 -0400 (EDT) From: Michael Roth To: qemu-devel@nongnu.org Date: Mon, 20 Mar 2017 18:08:24 -0500 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1490051325-3770-1-git-send-email-mdroth@linux.vnet.ibm.com> References: <1490051325-3770-1-git-send-email-mdroth@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17032023-0008-0000-0000-000001CF402C X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00006819; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000206; SDB=6.00836553; UDB=6.00411161; IPR=6.00614322; BA=6.00005224; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00014732; XFM=3.00000013; UTC=2017-03-20 23:09:41 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17032023-0009-0000-0000-000033FD6303 Message-Id: <1490051325-3770-61-git-send-email-mdroth@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-03-20_16:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=1 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1702020001 definitions=main-1703200196 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.156.1 Subject: [Qemu-devel] [PATCH 60/81] s390x/kvm: fix small race reboot vs. cmma 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: Christian Borntraeger , qemu-stable@nongnu.org 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" From: Christian Borntraeger Right now we reset all devices before we reset the cmma states. This can result in the host kernel discarding guest pages that were previously in the unused state but already contain a bios or a -kernel file before the cmma reset has finished. This race results in random guest crashes or hangs during very early reboot. Fixes: 1cd4e0f6f0a6 ("s390x/cmma: clean up cmma reset") Cc: qemu-stable@nongnu.org Signed-off-by: Christian Borntraeger (cherry picked from commit 1a0e4c8b02ea510508970c333ee610a90b921cbb) Signed-off-by: Michael Roth --- hw/s390x/s390-virtio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/s390x/s390-virtio.c b/hw/s390x/s390-virtio.c index 0a96347..7a3a7fe 100644 --- a/hw/s390x/s390-virtio.c +++ b/hw/s390x/s390-virtio.c @@ -204,8 +204,8 @@ void s390_machine_reset(void) { S390CPU *ipl_cpu =3D S390_CPU(qemu_get_cpu(0)); =20 - qemu_devices_reset(); s390_cmma_reset(); + qemu_devices_reset(); s390_crypto_reset(); =20 /* all cpus are stopped - configure and start the ipl cpu only */ --=20 2.7.4