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=-6.8 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 D82F1ECE561 for ; Mon, 24 Sep 2018 11:50:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 81D9D2145D for ; Mon, 24 Sep 2018 11:50:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 81D9D2145D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728737AbeIXRwa (ORCPT ); Mon, 24 Sep 2018 13:52:30 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:51298 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728007AbeIXRwa (ORCPT ); Mon, 24 Sep 2018 13:52:30 -0400 Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8OBdX8M131239 for ; Mon, 24 Sep 2018 07:50:46 -0400 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mpw7engdb-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 24 Sep 2018 07:50:46 -0400 Received: from localhost by e06smtp01.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, 24 Sep 2018 12:50:39 +0100 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8OBob6i53608564 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 24 Sep 2018 11:50:37 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8EBF5AE053; Mon, 24 Sep 2018 14:49:39 +0100 (BST) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9FC67AE058; Mon, 24 Sep 2018 14:49:38 +0100 (BST) Received: from oc0155643701.ibm.com (unknown [9.152.224.150]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 24 Sep 2018 14:49:38 +0100 (BST) Subject: Re: [PATCH v10 10/26] KVM: s390: interfaces to clear CRYCB masks To: Cornelia Huck , Tony Krowiak Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, kwankhede@nvidia.com, bjsdjshi@linux.vnet.ibm.com, pbonzini@redhat.com, alex.williamson@redhat.com, pmorel@linux.vnet.ibm.com, alifm@linux.vnet.ibm.com, mjrosato@linux.vnet.ibm.com, jjherne@linux.vnet.ibm.com, thuth@redhat.com, pasic@linux.vnet.ibm.com, berrange@redhat.com, fiuczy@linux.vnet.ibm.com, buendgen@de.ibm.com, frankja@linux.ibm.com, Tony Krowiak References: <1536781396-13601-1-git-send-email-akrowiak@linux.vnet.ibm.com> <1536781396-13601-11-git-send-email-akrowiak@linux.vnet.ibm.com> <20180924130153.766eaec7.cohuck@redhat.com> From: Halil Pasic Openpgp: preference=signencrypt Autocrypt: addr=pasic@linux.ibm.com; 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Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20180924130153.766eaec7.cohuck@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 18092411-4275-0000-0000-000002BED5D3 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092411-4276-0000-0000-000037C8E2C4 Message-Id: <42b23a01-bee1-0c87-3f81-320c40bcb7c9@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-24_07:,, 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=932 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809240119 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/24/2018 01:01 PM, Cornelia Huck wrote: > On Wed, 12 Sep 2018 15:43:00 -0400 > Tony Krowiak wrote: > >> From: Tony Krowiak >> >> Introduces two new KVM interface to clear the APM, AQM and ADM masks in >> the guest's CRYCB. The VCPUs are taken out of SIE to ensure the VCPUs do >> not get out of sync. > > Hm, that patch description does not quite match what the patch actually > does... > You mean it is not obvious where the masks get cleared? Well the APCB is defined to contain exactly the three masks. As far as I can tell the patch description is correct. Regards, Halil >> >> Signed-off-by: Tony Krowiak >> Acked-by: Halil Pasic >> Tested-by: Michael Mueller >> Tested-by: Farhan Ali >> Tested-by: Pierre Morel >> Signed-off-by: Christian Borntraeger >> --- >> arch/s390/include/asm/kvm_host.h | 2 ++ >> arch/s390/kvm/kvm-s390.c | 15 +++++++++++++++ >> 2 files changed, 17 insertions(+), 0 deletions(-) >> >> diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h >> index 423cce7..1e758fe 100644 >> --- a/arch/s390/include/asm/kvm_host.h >> +++ b/arch/s390/include/asm/kvm_host.h >> @@ -858,6 +858,8 @@ void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, >> void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, >> struct kvm_async_pf *work); >> >> +void kvm_arch_crypto_clear_masks(struct kvm *kvm); >> + >> extern int sie64a(struct kvm_s390_sie_block *, u64 *); >> extern char sie_exit; >> >> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c >> index d717041..ac4c93f 100644 >> --- a/arch/s390/kvm/kvm-s390.c >> +++ b/arch/s390/kvm/kvm-s390.c >> @@ -2033,6 +2033,21 @@ static void kvm_s390_set_crycb_format(struct kvm *kvm) >> kvm->arch.crypto.crycbd |= CRYCB_FORMAT1; >> } >> >> +void kvm_arch_crypto_clear_masks(struct kvm *kvm) >> +{ >> + mutex_lock(&kvm->lock); >> + kvm_s390_vcpu_block_all(kvm); >> + >> + memset(&kvm->arch.crypto.crycb->apcb0, 0, >> + sizeof(kvm->arch.crypto.crycb->apcb0)); >> + memset(&kvm->arch.crypto.crycb->apcb1, 0, >> + sizeof(kvm->arch.crypto.crycb->apcb1)); >> + >> + kvm_s390_vcpu_unblock_all(kvm); >> + mutex_unlock(&kvm->lock); >> +} >> +EXPORT_SYMBOL_GPL(kvm_arch_crypto_clear_masks); > > ...although this function looks fine. > >> + >> static u64 kvm_s390_get_initial_cpuid(void) >> { >> struct cpuid cpuid; >