From nobody Thu Nov 6 06:39:50 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1536783125117920.8582149268095; Wed, 12 Sep 2018 13:12:05 -0700 (PDT) Received: from localhost ([::1]:38246 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g0BUZ-0000F5-Hy for importer@patchew.org; Wed, 12 Sep 2018 16:12:03 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51924) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g0BRV-0006jO-OO for qemu-devel@nongnu.org; Wed, 12 Sep 2018 16:08:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1g0BRR-00025i-9C for qemu-devel@nongnu.org; Wed, 12 Sep 2018 16:08:53 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:38744 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1g0BRP-00024X-Tl for qemu-devel@nongnu.org; Wed, 12 Sep 2018 16:08:49 -0400 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8CJwmMA117383 for ; Wed, 12 Sep 2018 16:08:47 -0400 Received: from e31.co.us.ibm.com (e31.co.us.ibm.com [32.97.110.149]) by mx0b-001b2d01.pphosted.com with ESMTP id 2mf68egda4-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 12 Sep 2018 16:08:46 -0400 Received: from localhost by e31.co.us.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, 12 Sep 2018 14:08:40 -0600 Received: from b03ledav001.gho.boulder.ibm.com (b03ledav001.gho.boulder.ibm.com [9.17.130.232]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8CK8b2L42467474 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 12 Sep 2018 13:08:37 -0700 Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D67ED6E052; Wed, 12 Sep 2018 14:08:37 -0600 (MDT) Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5D2ED6E054; Wed, 12 Sep 2018 14:08:35 -0600 (MDT) Received: from localhost.localdomain (unknown [9.80.213.181]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTPS; Wed, 12 Sep 2018 14:08:35 -0600 (MDT) From: Tony Krowiak To: qemu-devel@nongnu.org Date: Wed, 12 Sep 2018 16:08:17 -0400 X-Mailer: git-send-email 1.7.1 In-Reply-To: <1536782900-17656-1-git-send-email-akrowiak@linux.vnet.ibm.com> References: <1536782900-17656-1-git-send-email-akrowiak@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18091220-8235-0000-0000-00000DFE3415 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009709; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01087379; UDB=6.00561493; IPR=6.00867391; MB=3.00023257; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-12 20:08:44 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18091220-8236-0000-0000-0000429E6015 Message-Id: <1536782900-17656-4-git-send-email-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-09-12_10:, , 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=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809120198 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH v8 3/6] s390x/kvm: enable/disable AP instruction interpretation for guest X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, akrowiak@linux.vnet.ibm.com, cohuck@redhat.com, david@redhat.com, pmorel@linux.vnet.ibm.com, fiuczy@linux.ibm.com, eskultet@redhat.com, agraf@suse.de, borntraeger@de.ibm.com, jjherne@linux.vnet.ibm.com, mimu@linux.ibm.com, Tony Krowiak , heiko.carstens@de.ibm.com, eric.auger@redhat.com, alex.williamson@redhat.com, bjsdjshi@linux.vnet.ibm.com, rth@twiddle.net, mjrosato@linux.vnet.ibm.com, pasic@linux.vnet.ibm.com, alifm@linux.vnet.ibm.com, qemu-s390x@nongnu.org, schwidefsky@de.ibm.com, pbonzini@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Tony Krowiak Let's use the KVM_SET_DEVICE_ATTR ioctl to enable or disable hardware interpretation of AP instructions executed on the guest. If the S390_FEAT_AP feature is installed, AP instructions will be interpreted by default; otherwise, they will be intercepted. This attribute setting may be overridden by a device. For example, a device may want to provide AP instructions to the guest (i.e., S390_FEAT_AP turned on), but it may want to emulate them. In this case, the AP instructions executed on the guest must be intercepted; so when the device is realized, it must disable interpretation. Signed-off-by: Tony Krowiak --- target/s390x/kvm.c | 16 ++++++++++++++++ 1 files changed, 16 insertions(+), 0 deletions(-) diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c index c4bd84d..28a3900 100644 --- a/target/s390x/kvm.c +++ b/target/s390x/kvm.c @@ -2297,6 +2297,19 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *model= , Error **errp) S390_FEAT_MAX); } =20 +static void kvm_s390_configure_apie(int interpret) +{ + uint64_t attr =3D KVM_S390_VM_CRYPTO_DISABLE_APIE; + + if (interpret) { + attr =3D KVM_S390_VM_CRYPTO_ENABLE_APIE; + } + + if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) { + kvm_s390_set_attr(attr); + } +} + void kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp) { struct kvm_s390_vm_cpu_processor prop =3D { @@ -2346,6 +2359,9 @@ void kvm_s390_apply_cpu_model(const S390CPUModel *mod= el, Error **errp) if (test_bit(S390_FEAT_CMM, model->features)) { kvm_s390_enable_cmma(); } + + /* configure hardware interpretation of AP instructions */ + kvm_s390_configure_apie(test_bit(S390_FEAT_AP, model->features)); } =20 void kvm_s390_restart_interrupt(S390CPU *cpu) --=20 1.7.1