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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 AD822C35247 for ; Tue, 4 Feb 2020 21:13:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7B6AE2082E for ; Tue, 4 Feb 2020 21:13:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727494AbgBDVN0 (ORCPT ); Tue, 4 Feb 2020 16:13:26 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:36234 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727389AbgBDVN0 (ORCPT ); Tue, 4 Feb 2020 16:13:26 -0500 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 014L7E0e145612 for ; Tue, 4 Feb 2020 16:13:25 -0500 Received: from e06smtp05.uk.ibm.com (e06smtp05.uk.ibm.com [195.75.94.101]) by mx0a-001b2d01.pphosted.com with ESMTP id 2xydyxn55s-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 04 Feb 2020 16:13:25 -0500 Received: from localhost by e06smtp05.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) Tue, 4 Feb 2020 21:13:21 -0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 014LDKxH51445838 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 4 Feb 2020 21:13:20 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 02445A405F; Tue, 4 Feb 2020 21:13:20 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 84B46A4054; Tue, 4 Feb 2020 21:13:19 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.145.174.10]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 4 Feb 2020 21:13:19 +0000 (GMT) Subject: Re: [RFCv2 08/37] KVM: s390: protvirt: Add initial lifecycle handling To: Cornelia Huck Cc: Janosch Frank , KVM , David Hildenbrand , Thomas Huth , Ulrich Weigand , Claudio Imbrenda , Andrea Arcangeli References: <20200203131957.383915-1-borntraeger@de.ibm.com> <20200203131957.383915-9-borntraeger@de.ibm.com> <20200204172718.4780f011.cohuck@redhat.com> From: Christian Borntraeger Autocrypt: addr=borntraeger@de.ibm.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0 MIME-Version: 1.0 In-Reply-To: <20200204172718.4780f011.cohuck@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 20020421-0020-0000-0000-000003A6FF9F X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20020421-0021-0000-0000-000021FEC746 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-02-04_08:2020-02-04,2020-02-04 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxscore=0 phishscore=0 mlxlogscore=999 adultscore=0 bulkscore=0 suspectscore=0 clxscore=1015 impostorscore=0 lowpriorityscore=0 spamscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1911200001 definitions=main-2002040145 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 04.02.20 17:27, Cornelia Huck wrote: >> +struct uv_cb_cgc { > > Given that we now have a bunch of structs of the form uv_cb_TLA, can we > add a comment to each for what uv call they are? ack. > >> + struct uv_cb_header header; >> + u64 reserved08[2]; >> + u64 guest_handle; >> + u64 conf_base_stor_origin; >> + u64 conf_var_stor_origin; >> + u64 reserved30; >> + u64 guest_stor_origin; >> + u64 guest_stor_len; >> + u64 guest_sca; >> + u64 guest_asce; >> + u64 reserved60[5]; >> +} __packed __aligned(8); > > (...) > >> +#ifdef CONFIG_KVM_S390_PROTECTED_VIRTUALIZATION_HOST >> +static int kvm_s390_handle_pv(struct kvm *kvm, struct kvm_pv_cmd *cmd) >> +{ >> + int r = 0; >> + void __user *argp = (void __user *)cmd->data; >> + >> + switch (cmd->cmd) { >> + case KVM_PV_VM_CREATE: { >> + r = -EINVAL; >> + if (kvm_s390_pv_is_protected(kvm)) >> + break; >> + >> + r = kvm_s390_pv_alloc_vm(kvm); >> + if (r) >> + break; >> + >> + mutex_lock(&kvm->lock); >> + kvm_s390_vcpu_block_all(kvm); >> + /* FMT 4 SIE needs esca */ >> + r = sca_switch_to_extended(kvm); >> + if (!r) >> + r = kvm_s390_pv_create_vm(kvm); > > If sca_switch_to_extended() fails, you don't call > kvm_s390_pv_dealloc_vm(). Also, kvm_s390_pv_create_vm() _does_ call > _dealloc_vm() on failure, which seems a bit surprising. I'd probably > move the _dealloc_vm() out of the error path of _create_vm() and call > it here for r != 0. Indeed this is fishy. Will fix. I might also want to split this patch into an ultravisor related part and a kvm user interface part. then this would have been more obvious and it could be easier to try Davids proposal regarding enable/disable. Its not that easyto split though, not sure if this works out. > >> + kvm_s390_vcpu_unblock_all(kvm); >> + mutex_unlock(&kvm->lock); >> + break; >> + } > > (...) >