From patchwork Tue Jun 21 13:13:19 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Borntraeger X-Patchwork-Id: 9190867 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 1B9466075A for ; Tue, 21 Jun 2016 15:49:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0AA76281F9 for ; Tue, 21 Jun 2016 15:49:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F369F282ED; Tue, 21 Jun 2016 15:49:31 +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=-6.9 required=2.0 tests=BAYES_00,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 7BACD281F9 for ; Tue, 21 Jun 2016 15:49:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751892AbcFUPrr (ORCPT ); Tue, 21 Jun 2016 11:47:47 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:64535 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751357AbcFUPrn (ORCPT ); Tue, 21 Jun 2016 11:47:43 -0400 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id u5LDADwj040148 for ; Tue, 21 Jun 2016 09:13:19 -0400 Received: from e06smtp13.uk.ibm.com (e06smtp13.uk.ibm.com [195.75.94.109]) by mx0b-001b2d01.pphosted.com with ESMTP id 23n2ekuqxk-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 21 Jun 2016 09:13:19 -0400 Received: from localhost by e06smtp13.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 21 Jun 2016 14:13:15 +0100 X-IBM-Helo: d06dlp02.portsmouth.uk.ibm.com X-IBM-MailFrom: borntraeger@de.ibm.com X-IBM-RcptTo: kvm@vger.kernel.org;linux-s390@vger.kernel.org Received: from b06cxnps4074.portsmouth.uk.ibm.com (d06relay11.portsmouth.uk.ibm.com [9.149.109.196]) by d06dlp02.portsmouth.uk.ibm.com (Postfix) with ESMTP id 98C45219006A; Tue, 21 Jun 2016 14:12:45 +0100 (BST) Received: from d06av08.portsmouth.uk.ibm.com (d06av08.portsmouth.uk.ibm.com [9.149.37.249]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u5LDDErF51052712; Tue, 21 Jun 2016 13:13:14 GMT Received: from d06av08.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av08.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u5LDDDHT022358; Tue, 21 Jun 2016 07:13:14 -0600 Received: from tuxmaker.boeblingen.de.ibm.com (tuxmaker.boeblingen.de.ibm.com [9.152.85.9]) by d06av08.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u5LDDDcu022338 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 21 Jun 2016 07:13:13 -0600 Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 25651) id 9B6A120F542; Tue, 21 Jun 2016 15:13:13 +0200 (CEST) From: Christian Borntraeger To: Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= Cc: KVM , Cornelia Huck , linux-s390 , Christian Borntraeger , David Hildenbrand , Martin Schwidefsky Subject: [GIT PULL 41/51] KVM: s390: vsie: support guest-storage-limit-suppression Date: Tue, 21 Jun 2016 15:13:19 +0200 X-Mailer: git-send-email 2.5.5 In-Reply-To: <1466514809-146638-1-git-send-email-borntraeger@de.ibm.com> References: <1466514809-146638-1-git-send-email-borntraeger@de.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16062113-0012-0000-0000-00000423942A X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16062113-0013-0000-0000-00001465FDF8 Message-Id: <1466514809-146638-42-git-send-email-borntraeger@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-06-21_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1604210000 definitions=main-1606210152 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: David Hildenbrand We can easily forward guest-storage-limit-suppression if available. One thing to care about is keeping the prefix properly mapped when gsls in toggled on/off or the mso changes in between. Therefore we better remap the prefix on any mso changes just like we already do with the prefix. Acked-by: Christian Borntraeger Signed-off-by: David Hildenbrand Signed-off-by: Christian Borntraeger --- arch/s390/include/uapi/asm/kvm.h | 1 + arch/s390/kvm/kvm-s390.c | 2 ++ arch/s390/kvm/vsie.c | 7 +++++-- 3 files changed, 8 insertions(+), 2 deletions(-) diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h index 98526ac..9ed0747 100644 --- a/arch/s390/include/uapi/asm/kvm.h +++ b/arch/s390/include/uapi/asm/kvm.h @@ -102,6 +102,7 @@ struct kvm_s390_vm_cpu_machine { #define KVM_S390_VM_CPU_FEAT_64BSCAO 2 #define KVM_S390_VM_CPU_FEAT_SIIF 3 #define KVM_S390_VM_CPU_FEAT_GPERE 4 +#define KVM_S390_VM_CPU_FEAT_GSLS 5 struct kvm_s390_vm_cpu_feat { __u64 feat[16]; }; diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 1757528..ce9813a 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -271,6 +271,8 @@ static void kvm_s390_cpu_feat_init(void) allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF); if (sclp.has_gpere) allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GPERE); + if (sclp.has_gsls) + allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS); } int kvm_arch_init(void *opaque) diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index b8792ef..ea65bf2 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -109,6 +109,8 @@ static int prepare_cpuflags(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) } if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_GPERE)) newflags |= cpuflags & CPUSTAT_P; + if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_GSLS)) + newflags |= cpuflags & CPUSTAT_SM; atomic_set(&scb_s->cpuflags, newflags); return 0; @@ -242,7 +244,7 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) struct kvm_s390_sie_block *scb_o = vsie_page->scb_o; struct kvm_s390_sie_block *scb_s = &vsie_page->scb_s; bool had_tx = scb_s->ecb & 0x10U; - unsigned long new_mso; + unsigned long new_mso = 0; int rc; /* make sure we don't have any leftovers when reusing the scb */ @@ -284,7 +286,8 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) scb_s->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; scb_s->icpua = scb_o->icpua; - new_mso = scb_o->mso & 0xfffffffffff00000UL; + if (!(atomic_read(&scb_s->cpuflags) & CPUSTAT_SM)) + new_mso = scb_o->mso & 0xfffffffffff00000UL; /* if the hva of the prefix changes, we have to remap the prefix */ if (scb_s->mso != new_mso || scb_s->prefix != scb_o->prefix) prefix_unmapped(vsie_page);