From patchwork Wed Aug 22 16:51:57 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 10573061 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1578C920 for ; Wed, 22 Aug 2018 16:52:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0463F2BA10 for ; Wed, 22 Aug 2018 16:52:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EC2F82BA57; Wed, 22 Aug 2018 16:52:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 911472BA10 for ; Wed, 22 Aug 2018 16:52:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727478AbeHVURw (ORCPT ); Wed, 22 Aug 2018 16:17:52 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:35606 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727466AbeHVURv (ORCPT ); Wed, 22 Aug 2018 16:17:51 -0400 Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w7MGmfFW020577 for ; Wed, 22 Aug 2018 12:52:12 -0400 Received: from e06smtp05.uk.ibm.com (e06smtp05.uk.ibm.com [195.75.94.101]) by mx0a-001b2d01.pphosted.com with ESMTP id 2m19s961uf-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 22 Aug 2018 12:52:12 -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) Wed, 22 Aug 2018 17:52:06 +0100 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w7MGq55c43778142 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 22 Aug 2018 16:52:05 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E5B96AE056; Wed, 22 Aug 2018 19:51:42 +0100 (BST) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9268EAE051; Wed, 22 Aug 2018 19:51:42 +0100 (BST) Received: from morel-ThinkPad-W530.boeblingen.de.ibm.com (unknown [9.152.224.111]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 22 Aug 2018 19:51:42 +0100 (BST) From: Pierre Morel To: 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, borntraeger@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com Subject: [PATCH v2 5/5] KVM: s390: vsie: Do the CRYCB validation first Date: Wed, 22 Aug 2018 18:51:57 +0200 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1534956717-14087-1-git-send-email-pmorel@linux.ibm.com> References: <1534956717-14087-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18082216-0020-0000-0000-000002BA42AD X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18082216-0021-0000-0000-000021079A1F Message-Id: <1534956717-14087-6-git-send-email-pmorel@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-08-22_08:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=874 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808220169 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When entering the SIE the CRYCB validation better be done independently of the instruction's availability. Signed-off-by: Pierre Morel --- arch/s390/kvm/vsie.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index 7ee4329..fca25aa 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -164,17 +164,18 @@ static int shadow_crycb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) /* format-1 is supported with message-security-assist extension 3 */ if (!test_kvm_facility(vcpu->kvm, 76)) return 0; - /* we may only allow it if enabled for guest 2 */ - ecb3_flags = scb_o->ecb3 & vcpu->arch.sie_block->ecb3 & - (ECB3_AES | ECB3_DEA); - if (!ecb3_flags) - return 0; if ((crycb_addr & PAGE_MASK) != ((crycb_addr + 128) & PAGE_MASK)) return set_validity_icpt(scb_s, 0x003CU); if (!crycb_addr) return set_validity_icpt(scb_s, 0x0039U); + /* we may only allow it if enabled for guest 2 */ + ecb3_flags = scb_o->ecb3 & vcpu->arch.sie_block->ecb3 & + (ECB3_AES | ECB3_DEA); + if (!ecb3_flags) + return 0; + /* copy only the wrapping keys */ if (read_guest_real(vcpu, crycb_addr + 72, vsie_page->crycb.dea_wrapping_key_mask, 56))