From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 50B08C43387 for ; Wed, 19 Dec 2018 19:20:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2B2282080D for ; Wed, 19 Dec 2018 19:20:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729184AbeLSTSK (ORCPT ); Wed, 19 Dec 2018 14:18:10 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:43940 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727852AbeLSTSI (ORCPT ); Wed, 19 Dec 2018 14:18:08 -0500 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id wBJIwgAP078276 for ; Wed, 19 Dec 2018 14:18:07 -0500 Received: from e06smtp07.uk.ibm.com (e06smtp07.uk.ibm.com [195.75.94.103]) by mx0b-001b2d01.pphosted.com with ESMTP id 2pftcmdeqe-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 19 Dec 2018 14:18:06 -0500 Received: from localhost by e06smtp07.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 19 Dec 2018 19:18:03 -0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id wBJJI1ge5439836 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 19 Dec 2018 19:18:01 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2FFAF5204F; Wed, 19 Dec 2018 19:18:01 +0000 (GMT) Received: from s38lp84.lnxne.boe (unknown [9.152.108.100]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id C921F5204E; Wed, 19 Dec 2018 19:18:00 +0000 (GMT) From: Michael Mueller To: KVM Mailing List Cc: Linux-S390 Mailing List , linux-kernel@vger.kernel.org, kvm390-list@tuxmaker.boeblingen.de.ibm.com, Martin Schwidefsky , Heiko Carstens , Christian Borntraeger , Janosch Frank , David Hildenbrand , Cornelia Huck , Halil Pasic , Pierre Morel , Michael Mueller Subject: [PATCH v5 01/15] KVM: s390: unregister debug feature on failing arch init Date: Wed, 19 Dec 2018 20:17:42 +0100 X-Mailer: git-send-email 2.13.4 In-Reply-To: <20181219191756.57973-1-mimu@linux.ibm.com> References: <20181219191756.57973-1-mimu@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18121919-0028-0000-0000-0000032CDB59 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18121919-0029-0000-0000-000023E93E4C Message-Id: <20181219191756.57973-2-mimu@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-12-19_10:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1812190150 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Make sure the debug feature and its allocated resources get released upon unsuccessful architecture initialization. A related indication of the issue will be reported as kernel message. Signed-off-by: Michael Mueller Reviewed-by: Cornelia Huck Reviewed-by: Pierre Morel Reviewed-by: David Hildenbrand Message-Id: <20181130143215.69496-2-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger --- Documentation/kmsg/s390/kvm | 12 ++++++++++++ arch/s390/kvm/kvm-s390.c | 17 ++++++++++++++--- 2 files changed, 26 insertions(+), 3 deletions(-) create mode 100644 Documentation/kmsg/s390/kvm diff --git a/Documentation/kmsg/s390/kvm b/Documentation/kmsg/s390/kvm new file mode 100644 index 000000000000..76ffe2012254 --- /dev/null +++ b/Documentation/kmsg/s390/kvm @@ -0,0 +1,12 @@ +/*? + * Text: "Failed to register FLIC rc=%d\n" + * Severity: Error + * Parameter: + * @1: return code of the FLIC registration call + * Description: + * The registration of the FLIC (Floating Interrupt Controller Interface) + * was not successful. + * User action: + * If this problem persists after a reload of the kvm kernel module, gather + * Linux debug data and contact your support organization. + */ diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index fe24150ff666..d8d8e0788157 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -417,19 +417,30 @@ static void kvm_s390_cpu_feat_init(void) int kvm_arch_init(void *opaque) { + int rc; + kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long)); if (!kvm_s390_dbf) return -ENOMEM; if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) { - debug_unregister(kvm_s390_dbf); - return -ENOMEM; + rc = -ENOMEM; + goto out_debug_unreg; } kvm_s390_cpu_feat_init(); /* Register floating interrupt controller interface. */ - return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); + rc = kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); + if (rc) { + pr_err("Failed to register FLIC rc=%d\n", rc); + goto out_debug_unreg; + } + return 0; + +out_debug_unreg: + debug_unregister(kvm_s390_dbf); + return rc; } void kvm_arch_exit(void) -- 2.13.4