From patchwork Mon Mar 22 14:05:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudio Imbrenda X-Patchwork-Id: 12154877 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 116CCC433E5 for ; Mon, 22 Mar 2021 14:07:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D1A9E61994 for ; Mon, 22 Mar 2021 14:06:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230509AbhCVOGa (ORCPT ); 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Mon, 22 Mar 2021 14:06:01 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 45DAB4C05A; Mon, 22 Mar 2021 14:06:01 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DE26A4C04E; Mon, 22 Mar 2021 14:06:00 +0000 (GMT) Received: from ibm-vm.ibmuc.com (unknown [9.145.2.56]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 22 Mar 2021 14:06:00 +0000 (GMT) From: Claudio Imbrenda To: linux-kernel@vger.kernel.org Cc: borntraeger@de.ibm.com, frankja@linux.ibm.com, david@redhat.com, cohuck@redhat.com, kvm@vger.kernel.org, linux-s390@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH v2 2/2] s390/kvm: VSIE: fix MVPG handling for prefixing and MSO Date: Mon, 22 Mar 2021 15:05:59 +0100 Message-Id: <20210322140559.500716-3-imbrenda@linux.ibm.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210322140559.500716-1-imbrenda@linux.ibm.com> References: <20210322140559.500716-1-imbrenda@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369,18.0.761 definitions=2021-03-22_07:2021-03-22,2021-03-22 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 impostorscore=0 spamscore=0 suspectscore=0 mlxlogscore=999 priorityscore=1501 mlxscore=0 adultscore=0 bulkscore=0 malwarescore=0 lowpriorityscore=0 clxscore=1011 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103220103 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Prefixing needs to be applied to the guest real address to translate it into a guest absolute address. The value of MSO needs to be added to a guest-absolute address in order to obtain the host-virtual. Fixes: 223ea46de9e79 ("s390/kvm: VSIE: correctly handle MVPG when in VSIE") Cc: stable@vger.kernel.org Signed-off-by: Claudio Imbrenda Reported-by: Janosch Frank Reviewed-by: David Hildenbrand --- arch/s390/kvm/vsie.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index 48aab6290a77..ac86f11e46dc 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -1002,7 +1002,7 @@ static u64 vsie_get_register(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page, static int vsie_handle_mvpg(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) { struct kvm_s390_sie_block *scb_s = &vsie_page->scb_s; - unsigned long pei_dest, pei_src, src, dest, mask; + unsigned long pei_dest, pei_src, dest, src, mask, mso, prefix; u64 *pei_block = &vsie_page->scb_o->mcic; int edat, rc_dest, rc_src; union ctlreg0 cr0; @@ -1010,9 +1010,13 @@ static int vsie_handle_mvpg(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) cr0.val = vcpu->arch.sie_block->gcr[0]; edat = cr0.edat && test_kvm_facility(vcpu->kvm, 8); mask = _kvm_s390_logical_to_effective(&scb_s->gpsw, PAGE_MASK); + mso = scb_s->mso & ~(1UL << 20); + prefix = scb_s->prefix << GUEST_PREFIX_SHIFT; dest = vsie_get_register(vcpu, vsie_page, scb_s->ipb >> 16) & mask; + dest = _kvm_s390_real_to_abs(prefix, dest) + mso; src = vsie_get_register(vcpu, vsie_page, scb_s->ipb >> 20) & mask; + src = _kvm_s390_real_to_abs(prefix, src) + mso; rc_dest = kvm_s390_shadow_fault(vcpu, vsie_page->gmap, dest, &pei_dest); rc_src = kvm_s390_shadow_fault(vcpu, vsie_page->gmap, src, &pei_src);