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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 54AA0C43219 for ; Mon, 29 Apr 2019 07:10:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1A3F72053B for ; Mon, 29 Apr 2019 07:10:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727397AbfD2HKZ (ORCPT ); Mon, 29 Apr 2019 03:10:25 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:49682 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726846AbfD2HKY (ORCPT ); Mon, 29 Apr 2019 03:10:24 -0400 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x3T76TkL079057 for ; Mon, 29 Apr 2019 03:10:23 -0400 Received: from e06smtp05.uk.ibm.com (e06smtp05.uk.ibm.com [195.75.94.101]) by mx0a-001b2d01.pphosted.com with ESMTP id 2s5t1aw8qk-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 29 Apr 2019 03:10:23 -0400 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) Mon, 29 Apr 2019 08:10:19 +0100 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x3T7AHVi33357914 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 29 Apr 2019 07:10:17 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8E7895204F; Mon, 29 Apr 2019 07:10:17 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.152.224.49]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 3B62752050; Mon, 29 Apr 2019 07:10:17 +0000 (GMT) Subject: Re: [PATCH] KVM: s390: vsie: Do not shadow CRYCB when no AP and no keys To: Pierre Morel , david@redhat.com Cc: linux-kernel@vger.kernel.org, cohuck@redhat.com, linux-s390@vger.kernel.org, kvm@vger.kernel.org, frankja@linux.ibm.com, akrowiak@linux.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com References: <1556269010-22258-1-git-send-email-pmorel@linux.ibm.com> From: Christian Borntraeger Openpgp: preference=signencrypt Autocrypt: addr=borntraeger@de.ibm.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <1556269010-22258-1-git-send-email-pmorel@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 19042907-0020-0000-0000-000003375C30 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19042907-0021-0000-0000-00002189D358 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-04-29_04:,, 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=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=964 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904290053 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 26.04.19 10:56, Pierre Morel wrote: > When the guest do not have AP instructions nor Key management > we should return without shadowing the CRYCB. > > We did not check correctly in the past. > > Fixes: b10bd9a256ae ("s390: vsie: Use effective CRYCBD.31 to check CRYCBD > validity") > Fixes: 6ee74098201b ("KVM: s390: vsie: allow CRYCB FORMAT-0") > > Signed-off-by: Pierre Morel > Reported-by: Christian Borntraeger > --- > arch/s390/kvm/vsie.c | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c > index c6983d9..ac411e9 100644 > --- a/arch/s390/kvm/vsie.c > +++ b/arch/s390/kvm/vsie.c > @@ -290,6 +290,7 @@ static int shadow_crycb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) > u8 ecb3_flags; > u32 ecd_flags; > int apie_h; > + int apie_s; > int key_msk = test_kvm_facility(vcpu->kvm, 76); > int fmt_o = crycbd_o & CRYCB_FORMAT_MASK; > int fmt_h = vcpu->arch.sie_block->crycbd & CRYCB_FORMAT_MASK; > @@ -298,7 +299,8 @@ static int shadow_crycb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) > scb_s->crycbd = 0; > > apie_h = vcpu->arch.sie_block->eca & ECA_APIE; > - if (!apie_h && (!key_msk || fmt_o == CRYCB_FORMAT0)) > + apie_s = apie_h & scb_o->eca; > + if (!apie_s && (!key_msk || (fmt_o == CRYCB_FORMAT0))) > return 0; > > if (!crycb_addr) > @@ -309,7 +311,7 @@ static int shadow_crycb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) > ((crycb_addr + 128) & PAGE_MASK)) > return set_validity_icpt(scb_s, 0x003CU); > > - if (apie_h && (scb_o->eca & ECA_APIE)) { > + if (apie_s) { > ret = setup_apcb(vcpu, &vsie_page->crycb, crycb_addr, > vcpu->kvm->arch.crypto.crycb, > fmt_o, fmt_h); > thanks applied.