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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 AC3D9C4321D for ; Mon, 20 Aug 2018 20:42:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 07B9E208CC for ; Mon, 20 Aug 2018 20:42:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 07B9E208CC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726729AbeHTX7N (ORCPT ); Mon, 20 Aug 2018 19:59:13 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:49776 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726237AbeHTX7N (ORCPT ); Mon, 20 Aug 2018 19:59:13 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E485A7D84D; Mon, 20 Aug 2018 20:42:05 +0000 (UTC) Received: from [10.36.116.37] (ovpn-116-37.ams2.redhat.com [10.36.116.37]) by smtp.corp.redhat.com (Postfix) with ESMTP id C82BA2026D66; Mon, 20 Aug 2018 20:41:58 +0000 (UTC) Subject: Re: [PATCH v9 07/22] KVM: s390: refactor crypto initialization To: Tony Krowiak , Tony Krowiak , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.com, kwankhede@nvidia.com, bjsdjshi@linux.vnet.ibm.com, pbonzini@redhat.com, alex.williamson@redhat.com, pmorel@linux.vnet.ibm.com, alifm@linux.vnet.ibm.com, mjrosato@linux.vnet.ibm.com, jjherne@linux.vnet.ibm.com, thuth@redhat.com, pasic@linux.vnet.ibm.com, berrange@redhat.com, fiuczy@linux.vnet.ibm.com, buendgen@de.ibm.com, frankja@linux.ibm.com References: <1534196899-16987-1-git-send-email-akrowiak@linux.vnet.ibm.com> <1534196899-16987-8-git-send-email-akrowiak@linux.vnet.ibm.com> <1ba9032d-963a-6ce1-0d10-11bebbaa315f@redhat.com> <9c44d7b2-792a-192d-83be-1fd636a2cd2f@linux.ibm.com> From: David Hildenbrand Openpgp: preference=signencrypt Autocrypt: addr=david@redhat.com; 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Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <9c44d7b2-792a-192d-83be-1fd636a2cd2f@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Mon, 20 Aug 2018 20:42:06 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Mon, 20 Aug 2018 20:42:06 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'david@redhat.com' RCPT:'' Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >> >>> + if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_AP)) >>> + vcpu->arch.sie_block->eca |= ECA_APIE; >>> >>> - vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; >>> + /* If MSAX3 is installed on the guest, set up protected key support */ >>> + if (test_kvm_facility(vcpu->kvm, 76)) { >>> + if (vcpu->kvm->arch.crypto.aes_kw) >>> + vcpu->arch.sie_block->ecb3 |= ECB3_AES; >>> + if (vcpu->kvm->arch.crypto.dea_kw) >>> + vcpu->arch.sie_block->ecb3 |= ECB3_DEA; >>> + } >> As the feature can never change, and aes_kw/dea_kw are only set to 1 in >> case we have test_kvm_facility(vcpu->kvm, 76), this change is not needed. >> >> I think this function can be pretty much left alone. Just add the >> KVM_S390_VM_CPU_FEAT_AP handling. > > I disagree, what about the case where the KVM_S390_VM_CPU_FEAT_AP is > configured for the guest but the MSAX3 facility (76) is not? Then aes_kw/dea_kw can never be set. kvm_s390_vm_set_crypto() and kvm_s390_crypto_init() correctly test for facility 76. Or am I missing a case? > >> >>> } >>> >>> void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) >>> >> > -- Thanks, David / dhildenb