From patchwork Tue Sep 25 23:16:16 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614967 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 40D9C16B1 for ; Tue, 25 Sep 2018 23:20:31 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 30CBA2AB7B for ; Tue, 25 Sep 2018 23:20:31 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 23AE22AB97; Tue, 25 Sep 2018 23:20:31 +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=-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 085162AB7B for ; Tue, 25 Sep 2018 23:20:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726115AbeIZFaB (ORCPT ); Wed, 26 Sep 2018 01:30:01 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:47848 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726321AbeIZF0y (ORCPT ); Wed, 26 Sep 2018 01:26:54 -0400 Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNETn0015921 for ; Tue, 25 Sep 2018 19:17:00 -0400 Received: from e32.co.us.ibm.com (e32.co.us.ibm.com [32.97.110.150]) by mx0b-001b2d01.pphosted.com with ESMTP id 2mqtus8as7-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:17:00 -0400 Received: from localhost by e32.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) Tue, 25 Sep 2018 17:16:55 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp07028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNGqZr56098978 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:16:52 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C11BA136051; Tue, 25 Sep 2018 17:16:52 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A1CD213604F; Tue, 25 Sep 2018 17:16:49 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:16:49 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, David Hildenbrand , Tony Krowiak Subject: [PATCH v11 01/26] KVM: s390: vsie: simulate VCPU SIE entry/exit Date: Tue, 25 Sep 2018 19:16:16 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0004-0000-0000-00001491C007 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873679; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:16:59 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0005-0000-0000-000088F065B4 Message-Id: <20180925231641.4954-2-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=774 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 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 VCPU requests and VCPU blocking right now don't take care of the vSIE (as it was not necessary until now). But we want to have synchronous VCPU requests that will also be handled before running the vSIE again. So let's simulate a SIE entry of the VCPU when calling the sie during vSIE handling and check for PROG_ flags. The existing infrastructure (e.g. exit_sie()) will then detect that the SIE (in form of the vSIE) is running and properly kick the vSIE CPU, resulting in it leaving the vSIE loop and therefore the vSIE interception handler, allowing it to handle VCPU requests. E.g. if we want to modify the crycb of the VCPU and make sure that any masks also get applied to the VSIE crycb shadow (which uses masks from the VCPU crycb), we will need a way to hinder the vSIE from running and make sure to process the updated crycb before reentering the vSIE again. Signed-off-by: David Hildenbrand Signed-off-by: Tony Krowiak Reviewed-by: Pierre Morel Reviewed-by: Cornelia Huck Reviewed-by: Janosch Frank Reviewed-by: Christian Borntraeger --- arch/s390/kvm/kvm-s390.c | 9 ++++++++- arch/s390/kvm/kvm-s390.h | 1 + arch/s390/kvm/vsie.c | 21 +++++++++++++++++---- 3 files changed, 26 insertions(+), 5 deletions(-) diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index f69333fd2fa3..0b5aff0e3984 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -2768,18 +2768,25 @@ static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu) exit_sie(vcpu); } +bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu) +{ + return atomic_read(&vcpu->arch.sie_block->prog20) & + (PROG_BLOCK_SIE | PROG_REQUEST); +} + static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu) { atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20); } /* - * Kick a guest cpu out of SIE and wait until SIE is not running. + * Kick a guest cpu out of (v)SIE and wait until (v)SIE is not running. * If the CPU is not running (e.g. waiting as idle) the function will * return immediately. */ void exit_sie(struct kvm_vcpu *vcpu) { kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT); + kvm_s390_vsie_kick(vcpu); while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) cpu_relax(); } diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index 981e3ba97461..1f6e36cdce0d 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -290,6 +290,7 @@ void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu); void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu); +bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu); void exit_sie(struct kvm_vcpu *vcpu); void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu); int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index a2b28cd1e3fe..12b970701c26 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -830,7 +830,7 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) struct kvm_s390_sie_block *scb_s = &vsie_page->scb_s; struct kvm_s390_sie_block *scb_o = vsie_page->scb_o; int guest_bp_isolation; - int rc; + int rc = 0; handle_last_fault(vcpu, vsie_page); @@ -858,7 +858,18 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) guest_enter_irqoff(); local_irq_enable(); - rc = sie64a(scb_s, vcpu->run->s.regs.gprs); + /* + * Simulate a SIE entry of the VCPU (see sie64a), so VCPU blocking + * and VCPU requests also hinder the vSIE from running and lead + * to an immediate exit. kvm_s390_vsie_kick() has to be used to + * also kick the vSIE. + */ + vcpu->arch.sie_block->prog0c |= PROG_IN_SIE; + barrier(); + if (!kvm_s390_vcpu_sie_inhibited(vcpu)) + rc = sie64a(scb_s, vcpu->run->s.regs.gprs); + barrier(); + vcpu->arch.sie_block->prog0c &= ~PROG_IN_SIE; local_irq_disable(); guest_exit_irqoff(); @@ -1005,7 +1016,8 @@ static int vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) if (rc == -EAGAIN) rc = 0; if (rc || scb_s->icptcode || signal_pending(current) || - kvm_s390_vcpu_has_irq(vcpu, 0)) + kvm_s390_vcpu_has_irq(vcpu, 0) || + kvm_s390_vcpu_sie_inhibited(vcpu)) break; } @@ -1122,7 +1134,8 @@ int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu) if (unlikely(scb_addr & 0x1ffUL)) return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); - if (signal_pending(current) || kvm_s390_vcpu_has_irq(vcpu, 0)) + if (signal_pending(current) || kvm_s390_vcpu_has_irq(vcpu, 0) || + kvm_s390_vcpu_sie_inhibited(vcpu)) return 0; vsie_page = get_vsie_page(vcpu->kvm, scb_addr); From patchwork Tue Sep 25 23:16:17 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614917 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 ACA8316B1 for ; Tue, 25 Sep 2018 23:17:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 84DBF2A9A2 for ; Tue, 25 Sep 2018 23:17:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 735C72AE33; Tue, 25 Sep 2018 23:17:10 +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 0616A2ADF6 for ; Tue, 25 Sep 2018 23:17:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726474AbeIZF07 (ORCPT ); Wed, 26 Sep 2018 01:26:59 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:59566 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726333AbeIZF06 (ORCPT ); Wed, 26 Sep 2018 01:26:58 -0400 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNEVwX060566 for ; Tue, 25 Sep 2018 19:17:05 -0400 Received: from e36.co.us.ibm.com (e36.co.us.ibm.com [32.97.110.154]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mqvmhm0bn-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 25 Sep 2018 17:17:00 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNGvBm10944664 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:16:57 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2B079136053; Tue, 25 Sep 2018 17:16:57 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0827213604F; Tue, 25 Sep 2018 17:16:54 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:16:53 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, David Hildenbrand , Tony Krowiak Subject: [PATCH v11 02/26] KVM: s390: introduce and use KVM_REQ_VSIE_RESTART Date: Tue, 25 Sep 2018 19:16:17 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0020-0000-0000-00000E6CBEBA X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873679; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:17:03 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0021-0000-0000-000063285035 Message-Id: <20180925231641.4954-3-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=688 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 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 When we change the crycb (or execution controls), we also have to make sure that the vSIE shadow datastructures properly consider the changed values before rerunning the vSIE. We can achieve that by simply using a VCPU request now. This has to be a synchronous request (== handled before entering the (v)SIE again). The request will make sure that the vSIE handler is left, and that the request will be processed (NOP), therefore forcing a reload of all vSIE data (including rebuilding the crycb) when re-entering the vSIE interception handler the next time. Signed-off-by: David Hildenbrand Signed-off-by: Tony Krowiak Reviewed-by: Pierre Morel Reviewed-by: Cornelia Huck Reviewed-by: Janosch Frank Reviewed-by: Christian Borntraeger --- arch/s390/include/asm/kvm_host.h | 1 + arch/s390/kvm/kvm-s390.c | 7 ++++++- 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 29c940bf8506..75d39628f21d 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -44,6 +44,7 @@ #define KVM_REQ_ICPT_OPEREXC KVM_ARCH_REQ(2) #define KVM_REQ_START_MIGRATION KVM_ARCH_REQ(3) #define KVM_REQ_STOP_MIGRATION KVM_ARCH_REQ(4) +#define KVM_REQ_VSIE_RESTART KVM_ARCH_REQ(5) #define SIGP_CTRL_C 0x80 #define SIGP_CTRL_SCN_MASK 0x3f diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 0b5aff0e3984..876fbb2b0c04 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -844,8 +844,11 @@ void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm) kvm_s390_vcpu_block_all(kvm); - kvm_for_each_vcpu(i, vcpu, kvm) + kvm_for_each_vcpu(i, vcpu, kvm) { kvm_s390_vcpu_crypto_setup(vcpu); + /* recreate the shadow crycb by leaving the VSIE handler */ + kvm_s390_sync_request(KVM_REQ_VSIE_RESTART, vcpu); + } kvm_s390_vcpu_unblock_all(kvm); } @@ -3203,6 +3206,8 @@ static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) /* nothing to do, just clear the request */ kvm_clear_request(KVM_REQ_UNHALT, vcpu); + /* we left the vsie handler, nothing to do, just clear the request */ + kvm_clear_request(KVM_REQ_VSIE_RESTART, vcpu); return 0; } From patchwork Tue Sep 25 23:16:18 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614919 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 E5E88913 for ; Tue, 25 Sep 2018 23:17:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D52CD2A9A2 for ; Tue, 25 Sep 2018 23:17:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C86172AE29; Tue, 25 Sep 2018 23:17:12 +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 3B5952A9A2 for ; Tue, 25 Sep 2018 23:17:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726727AbeIZF1D (ORCPT ); Wed, 26 Sep 2018 01:27:03 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:46736 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726595AbeIZF1D (ORCPT ); Wed, 26 Sep 2018 01:27:03 -0400 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNEUHl144402 for ; Tue, 25 Sep 2018 19:17:09 -0400 Received: from e31.co.us.ibm.com (e31.co.us.ibm.com [32.97.110.149]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mqvmgm8jd-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:17:09 -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) Tue, 25 Sep 2018 17:17:04 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNH1DM42008654 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:17:01 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7A89B136055; Tue, 25 Sep 2018 17:17:01 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 65BC1136051; Tue, 25 Sep 2018 17:16:58 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:16:58 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 03/26] KVM: s390: refactor crypto initialization Date: Tue, 25 Sep 2018 19:16:18 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-8235-0000-0000-00000E06BFB8 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873679; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:17:07 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-8236-0000-0000-000042C5968E Message-Id: <20180925231641.4954-4-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak This patch refactors the code that initializes and sets up the crypto configuration for a guest. The following changes are implemented via this patch: 1. Introduces a flag indicating AP instructions executed on the guest shall be interpreted by the firmware. This flag is used to set a bit in the guest's state description indicating AP instructions are to be interpreted. 2. Replace code implementing AP interfaces with code supplied by the AP bus to query the AP configuration. Signed-off-by: Tony Krowiak Reviewed-by: Halil Pasic Acked-by: Christian Borntraeger Acked-by: Janosch Frank Tested-by: Michael Mueller Tested-by: Farhan Ali Reviewed-by: Cornelia Huck --- arch/s390/include/asm/kvm_host.h | 3 ++ arch/s390/kvm/kvm-s390.c | 70 +++++++++++++++----------------- 2 files changed, 36 insertions(+), 37 deletions(-) diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 75d39628f21d..79fa0a3a777f 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -187,6 +187,7 @@ struct kvm_s390_sie_block { #define ECA_AIV 0x00200000 #define ECA_VX 0x00020000 #define ECA_PROTEXCI 0x00002000 +#define ECA_APIE 0x00000008 #define ECA_SII 0x00000001 __u32 eca; /* 0x004c */ #define ICPT_INST 0x04 @@ -256,6 +257,7 @@ struct kvm_s390_sie_block { __u8 reservede4[4]; /* 0x00e4 */ __u64 tecmc; /* 0x00e8 */ __u8 reservedf0[12]; /* 0x00f0 */ +#define CRYCB_FORMAT_MASK 0x00000003 #define CRYCB_FORMAT1 0x00000001 #define CRYCB_FORMAT2 0x00000003 __u32 crycbd; /* 0x00fc */ @@ -716,6 +718,7 @@ struct kvm_s390_crypto { __u32 crycbd; __u8 aes_kw; __u8 dea_kw; + __u8 apie; }; #define APCB0_MASK_SIZE 1 diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 876fbb2b0c04..d62f6d840f8c 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -40,6 +40,7 @@ #include #include #include +#include #include "kvm-s390.h" #include "gaccess.h" @@ -1995,49 +1996,37 @@ long kvm_arch_vm_ioctl(struct file *filp, return r; } -static int kvm_s390_query_ap_config(u8 *config) -{ - u32 fcn_code = 0x04000000UL; - u32 cc = 0; - - memset(config, 0, 128); - asm volatile( - "lgr 0,%1\n" - "lgr 2,%2\n" - ".long 0xb2af0000\n" /* PQAP(QCI) */ - "0: ipm %0\n" - "srl %0,28\n" - "1:\n" - EX_TABLE(0b, 1b) - : "+r" (cc) - : "r" (fcn_code), "r" (config) - : "cc", "0", "2", "memory" - ); - - return cc; -} - static int kvm_s390_apxa_installed(void) { - u8 config[128]; - int cc; + struct ap_config_info info; - if (test_facility(12)) { - cc = kvm_s390_query_ap_config(config); - - if (cc) - pr_err("PQAP(QCI) failed with cc=%d", cc); - else - return config[0] & 0x40; + if (ap_instructions_available()) { + if (ap_qci(&info) == 0) + return info.apxa; } return 0; } +/* + * The format of the crypto control block (CRYCB) is specified in the 3 low + * order bits of the CRYCB designation (CRYCBD) field as follows: + * Format 0: Neither the message security assist extension 3 (MSAX3) nor the + * AP extended addressing (APXA) facility are installed. + * Format 1: The APXA facility is not installed but the MSAX3 facility is. + * Format 2: Both the APXA and MSAX3 facilities are installed + */ static void kvm_s390_set_crycb_format(struct kvm *kvm) { kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb; + /* Clear the CRYCB format bits - i.e., set format 0 by default */ + kvm->arch.crypto.crycbd &= ~(CRYCB_FORMAT_MASK); + + /* Check whether MSAX3 is installed */ + if (!test_kvm_facility(kvm, 76)) + return; + if (kvm_s390_apxa_installed()) kvm->arch.crypto.crycbd |= CRYCB_FORMAT2; else @@ -2055,12 +2044,12 @@ static u64 kvm_s390_get_initial_cpuid(void) static void kvm_s390_crypto_init(struct kvm *kvm) { - if (!test_kvm_facility(kvm, 76)) - return; - kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb; kvm_s390_set_crycb_format(kvm); + if (!test_kvm_facility(kvm, 76)) + return; + /* Enable AES/DEA protected key functions by default */ kvm->arch.crypto.aes_kw = 1; kvm->arch.crypto.dea_kw = 1; @@ -2586,17 +2575,24 @@ void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) { - if (!test_kvm_facility(vcpu->kvm, 76)) + /* + * If the AP instructions are not being interpreted and the MSAX3 + * facility is not configured for the guest, there is nothing to set up. + */ + if (!vcpu->kvm->arch.crypto.apie && !test_kvm_facility(vcpu->kvm, 76)) return; + vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); + if (vcpu->kvm->arch.crypto.apie) + vcpu->arch.sie_block->eca |= ECA_APIE; + + /* Set up protected key support */ if (vcpu->kvm->arch.crypto.aes_kw) vcpu->arch.sie_block->ecb3 |= ECB3_AES; if (vcpu->kvm->arch.crypto.dea_kw) vcpu->arch.sie_block->ecb3 |= ECB3_DEA; - - vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; } void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) From patchwork Tue Sep 25 23:16:19 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614965 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 D7160913 for ; Tue, 25 Sep 2018 23:20:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C666B2AB65 for ; Tue, 25 Sep 2018 23:20:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B9E562AB75; Tue, 25 Sep 2018 23:20:01 +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 E47512AB65 for ; 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 25 Sep 2018 17:17:08 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNH5Gw47251670 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:17:06 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C55BC136055; Tue, 25 Sep 2018 17:17:05 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B415B13604F; Tue, 25 Sep 2018 17:17:02 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:17:02 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 04/26] s390: vfio-ap: base implementation of VFIO AP device driver Date: Tue, 25 Sep 2018 19:16:19 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0012-0000-0000-000016BBBF9B X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:17:11 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0013-0000-0000-00005488994B Message-Id: <20180925231641.4954-5-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak Introduces a new AP device driver. This device driver is built on the VFIO mediated device framework. The framework provides sysfs interfaces that facilitate passthrough access by guests to devices installed on the linux host. The VFIO AP device driver will serve two purposes: 1. Provide the interfaces to reserve AP devices for exclusive use by KVM guests. This is accomplished by unbinding the devices to be reserved for guest usage from the zcrypt device driver and binding them to the VFIO AP device driver. 2. Implements the functions, callbacks and sysfs attribute interfaces required to create one or more VFIO mediated devices each of which will be used to configure the AP matrix for a guest and serve as a file descriptor for facilitating communication between QEMU and the VFIO AP device driver. When the VFIO AP device driver is initialized: * It registers with the AP bus for control of type 10 (CEX4 and newer) AP queue devices. This limitation was imposed due to: 1. A desire to keep the code as simple as possible; 2. Some older models are no longer supported by the kernel and others are getting close to end of service. 3. A lack of older systems on which to test older devices. The probe and remove callbacks will be provided to support the binding/unbinding of AP queue devices to/from the VFIO AP device driver. * Creates a matrix device, /sys/devices/vfio_ap/matrix, to serve as the parent of the mediated devices created, one for each guest, and to hold the APQNs of the AP devices bound to the VFIO AP device driver. Signed-off-by: Tony Krowiak Reviewed-by: Halil Pasic Tested-by: Michael Mueller Tested-by: Farhan Ali Acked-by: David Hildenbrand Reviewed-by: Cornelia Huck --- MAINTAINERS | 10 ++ arch/s390/Kconfig | 11 ++ drivers/iommu/Kconfig | 8 ++ drivers/s390/crypto/Makefile | 4 + drivers/s390/crypto/vfio_ap_drv.c | 138 ++++++++++++++++++++++++++ drivers/s390/crypto/vfio_ap_private.h | 34 +++++++ 6 files changed, 205 insertions(+) create mode 100644 drivers/s390/crypto/vfio_ap_drv.c create mode 100644 drivers/s390/crypto/vfio_ap_private.h diff --git a/MAINTAINERS b/MAINTAINERS index e993064637ca..45cd096c0600 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12668,6 +12668,16 @@ W: http://www.ibm.com/developerworks/linux/linux390/ S: Supported F: drivers/s390/crypto/ +S390 VFIO AP DRIVER +M: Tony Krowiak +M: Pierre Morel +M: Halil Pasic +L: linux-s390@vger.kernel.org +W: http://www.ibm.com/developerworks/linux/linux390/ +S: Supported +F: drivers/s390/crypto/vfio_ap_drv.c +F: drivers/s390/crypto/vfio_ap_private.h + S390 ZFCP DRIVER M: Steffen Maier M: Benjamin Block diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 9a9c7a6fe925..8cc8f25d9576 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -773,6 +773,17 @@ config VFIO_CCW To compile this driver as a module, choose M here: the module will be called vfio_ccw. +config VFIO_AP + def_tristate n + prompt "VFIO support for AP devices" + depends on S390_AP_IOMMU && VFIO_MDEV_DEVICE && KVM + help + This driver grants access to Adjunct Processor (AP) devices + via the VFIO mediated device interface. + + To compile this driver as a module, choose M here: the module + will be called vfio_ap. + endmenu menu "Dump support" diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index c60395b7470f..83e6d993fca5 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -372,6 +372,14 @@ config S390_CCW_IOMMU Enables bits of IOMMU API required by VFIO. The iommu_ops is not implemented as it is not necessary for VFIO. +config S390_AP_IOMMU + bool "S390 AP IOMMU Support" + depends on S390 && ZCRYPT + select IOMMU_API + help + Enables bits of IOMMU API required by VFIO. The iommu_ops + is not implemented as it is not necessary for VFIO. + config MTK_IOMMU bool "MTK IOMMU Support" depends on ARM || ARM64 diff --git a/drivers/s390/crypto/Makefile b/drivers/s390/crypto/Makefile index b59af548ed1c..48e466eb19cf 100644 --- a/drivers/s390/crypto/Makefile +++ b/drivers/s390/crypto/Makefile @@ -15,3 +15,7 @@ obj-$(CONFIG_ZCRYPT) += zcrypt_pcixcc.o zcrypt_cex2a.o zcrypt_cex4.o # pkey kernel module pkey-objs := pkey_api.o obj-$(CONFIG_PKEY) += pkey.o + +# adjunct processor matrix +vfio_ap-objs := vfio_ap_drv.o +obj-$(CONFIG_VFIO_AP) += vfio_ap.o diff --git a/drivers/s390/crypto/vfio_ap_drv.c b/drivers/s390/crypto/vfio_ap_drv.c new file mode 100644 index 000000000000..ea2ae03c896e --- /dev/null +++ b/drivers/s390/crypto/vfio_ap_drv.c @@ -0,0 +1,138 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * VFIO based AP device driver + * + * Copyright IBM Corp. 2018 + * + * Author(s): Tony Krowiak + */ + +#include +#include +#include +#include +#include "vfio_ap_private.h" + +#define VFIO_AP_ROOT_NAME "vfio_ap" +#define VFIO_AP_DEV_TYPE_NAME "ap_matrix" +#define VFIO_AP_DEV_NAME "matrix" + +MODULE_AUTHOR("IBM Corporation"); +MODULE_DESCRIPTION("VFIO AP device driver, Copyright IBM Corp. 2018"); +MODULE_LICENSE("GPL v2"); + +static struct ap_driver vfio_ap_drv; + +static struct device_type vfio_ap_dev_type = { + .name = VFIO_AP_DEV_TYPE_NAME, +}; + +struct ap_matrix_dev *matrix_dev; + +/* Only type 10 adapters (CEX4 and later) are supported + * by the AP matrix device driver + */ +static struct ap_device_id ap_queue_ids[] = { + { .dev_type = AP_DEVICE_TYPE_CEX4, + .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE }, + { .dev_type = AP_DEVICE_TYPE_CEX5, + .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE }, + { .dev_type = AP_DEVICE_TYPE_CEX6, + .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE }, + { /* end of sibling */ }, +}; + +MODULE_DEVICE_TABLE(vfio_ap, ap_queue_ids); + +static int vfio_ap_queue_dev_probe(struct ap_device *apdev) +{ + return 0; +} + +static void vfio_ap_queue_dev_remove(struct ap_device *apdev) +{ + /* Nothing to do yet */ +} + +static void vfio_ap_matrix_dev_release(struct device *dev) +{ + struct ap_matrix_dev *matrix_dev = dev_get_drvdata(dev); + + kfree(matrix_dev); +} + +static int vfio_ap_matrix_dev_create(void) +{ + int ret; + struct device *root_device; + + root_device = root_device_register(VFIO_AP_ROOT_NAME); + if (IS_ERR(root_device)) + return PTR_ERR(root_device); + + matrix_dev = kzalloc(sizeof(*matrix_dev), GFP_KERNEL); + if (!matrix_dev) { + ret = -ENOMEM; + goto matrix_alloc_err; + } + + matrix_dev->device.type = &vfio_ap_dev_type; + dev_set_name(&matrix_dev->device, "%s", VFIO_AP_DEV_NAME); + matrix_dev->device.parent = root_device; + matrix_dev->device.release = vfio_ap_matrix_dev_release; + matrix_dev->device.driver = &vfio_ap_drv.driver; + + ret = device_register(&matrix_dev->device); + if (ret) + goto matrix_reg_err; + + return 0; + +matrix_reg_err: + put_device(&matrix_dev->device); +matrix_alloc_err: + root_device_unregister(root_device); + + return ret; +} + +static void vfio_ap_matrix_dev_destroy(void) +{ + device_unregister(&matrix_dev->device); + root_device_unregister(matrix_dev->device.parent); +} + +int __init vfio_ap_init(void) +{ + int ret; + + /* If there are no AP instructions, there is nothing to pass through. */ + if (!ap_instructions_available()) + return -ENODEV; + + ret = vfio_ap_matrix_dev_create(); + if (ret) + return ret; + + memset(&vfio_ap_drv, 0, sizeof(vfio_ap_drv)); + vfio_ap_drv.probe = vfio_ap_queue_dev_probe; + vfio_ap_drv.remove = vfio_ap_queue_dev_remove; + vfio_ap_drv.ids = ap_queue_ids; + + ret = ap_driver_register(&vfio_ap_drv, THIS_MODULE, VFIO_AP_DRV_NAME); + if (ret) { + vfio_ap_matrix_dev_destroy(); + return ret; + } + + return 0; +} + +void __exit vfio_ap_exit(void) +{ + ap_driver_unregister(&vfio_ap_drv); + vfio_ap_matrix_dev_destroy(); +} + +module_init(vfio_ap_init); +module_exit(vfio_ap_exit); diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h new file mode 100644 index 000000000000..6141420c8bb0 --- /dev/null +++ b/drivers/s390/crypto/vfio_ap_private.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Private data and functions for adjunct processor VFIO matrix driver. + * + * Author(s): Tony Krowiak + * + * Copyright IBM Corp. 2018 + */ + +#ifndef _VFIO_AP_PRIVATE_H_ +#define _VFIO_AP_PRIVATE_H_ + +#include +#include +#include +#include +#include + +#include "ap_bus.h" + +#define VFIO_AP_MODULE_NAME "vfio_ap" +#define VFIO_AP_DRV_NAME "vfio_ap" + +/** + * ap_matrix_dev - the AP matrix device structure + * @device: generic device structure associated with the AP matrix device + */ +struct ap_matrix_dev { + struct device device; +}; + +extern struct ap_matrix_dev *matrix_dev; + +#endif /* _VFIO_AP_PRIVATE_H_ */ From patchwork Tue Sep 25 23:16:20 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614921 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 3244216B1 for ; Tue, 25 Sep 2018 23:17:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 21F132A9A2 for ; Tue, 25 Sep 2018 23:17:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 159B32AE17; Tue, 25 Sep 2018 23:17:24 +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 395CA2A9A2 for ; 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 25 Sep 2018 17:17:13 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNHAV542270956 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:17:10 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2BD3A13605E; Tue, 25 Sep 2018 17:17:10 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0CAA713604F; Tue, 25 Sep 2018 17:17:07 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:17:06 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 05/26] s390: vfio-ap: register matrix device with VFIO mdev framework Date: Tue, 25 Sep 2018 19:16:20 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0020-0000-0000-00000E6CBEBB X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:17:16 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0021-0000-0000-000063285050 Message-Id: <20180925231641.4954-6-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak Registers the matrix device created by the VFIO AP device driver with the VFIO mediated device framework. Registering the matrix device will create the sysfs structures needed to create mediated matrix devices each of which will be used to configure the AP matrix for a guest and connect it to the VFIO AP device driver. Registering the matrix device with the VFIO mediated device framework will create the following sysfs structures: /sys/devices/vfio_ap/matrix/ ...... [mdev_supported_types] ......... [vfio_ap-passthrough] ............ create To create a mediated device for the AP matrix device, write a UUID to the create file: uuidgen > create A symbolic link to the mediated device's directory will be created in the devices subdirectory named after the generated $uuid: /sys/devices/vfio_ap/matrix/ ...... [mdev_supported_types] ......... [vfio_ap-passthrough] ............ [devices] ............... [$uuid] A symbolic link to the mediated device will also be created in the vfio_ap matrix's directory: /sys/devices/vfio_ap/matrix/[$uuid] Signed-off-by: Tony Krowiak Reviewed-by: Halil Pasic Reviewed-by: Cornelia Huck Tested-by: Michael Mueller Tested-by: Farhan Ali --- MAINTAINERS | 1 + drivers/s390/crypto/Makefile | 2 +- drivers/s390/crypto/vfio_ap_drv.c | 19 ++++ drivers/s390/crypto/vfio_ap_ops.c | 126 ++++++++++++++++++++++++++ drivers/s390/crypto/vfio_ap_private.h | 49 ++++++++++ include/uapi/linux/vfio.h | 1 + 6 files changed, 197 insertions(+), 1 deletion(-) create mode 100644 drivers/s390/crypto/vfio_ap_ops.c diff --git a/MAINTAINERS b/MAINTAINERS index 45cd096c0600..5db5b7e49d08 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12677,6 +12677,7 @@ W: http://www.ibm.com/developerworks/linux/linux390/ S: Supported F: drivers/s390/crypto/vfio_ap_drv.c F: drivers/s390/crypto/vfio_ap_private.h +F: drivers/s390/crypto/vfio_ap_ops.c S390 ZFCP DRIVER M: Steffen Maier diff --git a/drivers/s390/crypto/Makefile b/drivers/s390/crypto/Makefile index 48e466eb19cf..8d36b05a7575 100644 --- a/drivers/s390/crypto/Makefile +++ b/drivers/s390/crypto/Makefile @@ -17,5 +17,5 @@ pkey-objs := pkey_api.o obj-$(CONFIG_PKEY) += pkey.o # adjunct processor matrix -vfio_ap-objs := vfio_ap_drv.o +vfio_ap-objs := vfio_ap_drv.o vfio_ap_ops.o obj-$(CONFIG_VFIO_AP) += vfio_ap.o diff --git a/drivers/s390/crypto/vfio_ap_drv.c b/drivers/s390/crypto/vfio_ap_drv.c index ea2ae03c896e..8b51821d9bf7 100644 --- a/drivers/s390/crypto/vfio_ap_drv.c +++ b/drivers/s390/crypto/vfio_ap_drv.c @@ -76,6 +76,16 @@ static int vfio_ap_matrix_dev_create(void) goto matrix_alloc_err; } + /* Fill in config info via PQAP(QCI), if available */ + if (test_facility(12)) { + ret = ap_qci(&matrix_dev->info); + if (ret) + goto matrix_alloc_err; + } + + mutex_init(&matrix_dev->lock); + INIT_LIST_HEAD(&matrix_dev->mdev_list); + matrix_dev->device.type = &vfio_ap_dev_type; dev_set_name(&matrix_dev->device, "%s", VFIO_AP_DEV_NAME); matrix_dev->device.parent = root_device; @@ -125,11 +135,20 @@ int __init vfio_ap_init(void) return ret; } + ret = vfio_ap_mdev_register(); + if (ret) { + ap_driver_unregister(&vfio_ap_drv); + vfio_ap_matrix_dev_destroy(); + + return ret; + } + return 0; } void __exit vfio_ap_exit(void) { + vfio_ap_mdev_unregister(); ap_driver_unregister(&vfio_ap_drv); vfio_ap_matrix_dev_destroy(); } diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c new file mode 100644 index 000000000000..99ed30315f56 --- /dev/null +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -0,0 +1,126 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Adjunct processor matrix VFIO device driver callbacks. + * + * Copyright IBM Corp. 2018 + * + * Author(s): Tony Krowiak + * Halil Pasic + * Pierre Morel + */ +#include +#include +#include +#include +#include +#include + +#include "vfio_ap_private.h" + +#define VFIO_AP_MDEV_TYPE_HWVIRT "passthrough" +#define VFIO_AP_MDEV_NAME_HWVIRT "VFIO AP Passthrough Device" + +static void vfio_ap_matrix_init(struct ap_config_info *info, + struct ap_matrix *matrix) +{ + matrix->apm_max = info->apxa ? info->Na : 63; + matrix->aqm_max = info->apxa ? info->Nd : 15; + matrix->adm_max = info->apxa ? info->Nd : 15; +} + +static int vfio_ap_mdev_create(struct kobject *kobj, struct mdev_device *mdev) +{ + struct ap_matrix_mdev *matrix_mdev; + + if ((atomic_dec_if_positive(&matrix_dev->available_instances) < 0)) + return -EPERM; + + matrix_mdev = kzalloc(sizeof(*matrix_mdev), GFP_KERNEL); + if (!matrix_mdev) { + atomic_inc(&matrix_dev->available_instances); + return -ENOMEM; + } + + vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->matrix); + mdev_set_drvdata(mdev, matrix_mdev); + mutex_lock(&matrix_dev->lock); + list_add(&matrix_mdev->node, &matrix_dev->mdev_list); + mutex_unlock(&matrix_dev->lock); + + return 0; +} + +static int vfio_ap_mdev_remove(struct mdev_device *mdev) +{ + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + + mutex_lock(&matrix_dev->lock); + list_del(&matrix_mdev->node); + mutex_unlock(&matrix_dev->lock); + + kfree(matrix_mdev); + mdev_set_drvdata(mdev, NULL); + atomic_inc(&matrix_dev->available_instances); + + return 0; +} + +static ssize_t name_show(struct kobject *kobj, struct device *dev, char *buf) +{ + return sprintf(buf, "%s\n", VFIO_AP_MDEV_NAME_HWVIRT); +} + +MDEV_TYPE_ATTR_RO(name); + +static ssize_t available_instances_show(struct kobject *kobj, + struct device *dev, char *buf) +{ + return sprintf(buf, "%d\n", + atomic_read(&matrix_dev->available_instances)); +} + +MDEV_TYPE_ATTR_RO(available_instances); + +static ssize_t device_api_show(struct kobject *kobj, struct device *dev, + char *buf) +{ + return sprintf(buf, "%s\n", VFIO_DEVICE_API_AP_STRING); +} + +MDEV_TYPE_ATTR_RO(device_api); + +static struct attribute *vfio_ap_mdev_type_attrs[] = { + &mdev_type_attr_name.attr, + &mdev_type_attr_device_api.attr, + &mdev_type_attr_available_instances.attr, + NULL, +}; + +static struct attribute_group vfio_ap_mdev_hwvirt_type_group = { + .name = VFIO_AP_MDEV_TYPE_HWVIRT, + .attrs = vfio_ap_mdev_type_attrs, +}; + +static struct attribute_group *vfio_ap_mdev_type_groups[] = { + &vfio_ap_mdev_hwvirt_type_group, + NULL, +}; + +static const struct mdev_parent_ops vfio_ap_matrix_ops = { + .owner = THIS_MODULE, + .supported_type_groups = vfio_ap_mdev_type_groups, + .create = vfio_ap_mdev_create, + .remove = vfio_ap_mdev_remove, +}; + +int vfio_ap_mdev_register(void) +{ + atomic_set(&matrix_dev->available_instances, MAX_ZDEV_ENTRIES_EXT); + + return mdev_register_device(&matrix_dev->device, &vfio_ap_matrix_ops); +} + +void vfio_ap_mdev_unregister(void) +{ + mdev_unregister_device(&matrix_dev->device); +} diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h index 6141420c8bb0..9f197ffab7ad 100644 --- a/drivers/s390/crypto/vfio_ap_private.h +++ b/drivers/s390/crypto/vfio_ap_private.h @@ -3,6 +3,7 @@ * Private data and functions for adjunct processor VFIO matrix driver. * * Author(s): Tony Krowiak + * Halil Pasic * * Copyright IBM Corp. 2018 */ @@ -24,11 +25,59 @@ /** * ap_matrix_dev - the AP matrix device structure * @device: generic device structure associated with the AP matrix device + * @available_instances: number of mediated matrix devices that can be created + * @info: the struct containing the output from the PQAP(QCI) instruction + * mdev_list: the list of mediated matrix devices created + * lock: mutex for locking the AP matrix device. This lock will be + * taken every time we fiddle with state managed by the vfio_ap + * driver, be it using @mdev_list or writing the state of a + * single ap_matrix_mdev device. It's quite coarse but we don't + * expect much contention. */ struct ap_matrix_dev { struct device device; + atomic_t available_instances; + struct ap_config_info info; + struct list_head mdev_list; + struct mutex lock; }; extern struct ap_matrix_dev *matrix_dev; +/** + * The AP matrix is comprised of three bit masks identifying the adapters, + * queues (domains) and control domains that belong to an AP matrix. The bits i + * each mask, from least significant to most significant bit, correspond to IDs + * 0 to 255. When a bit is set, the corresponding ID belongs to the matrix. + * + * @apm_max: max adapter number in @apm + * @apm identifies the AP adapters in the matrix + * @aqm_max: max domain number in @aqm + * @aqm identifies the AP queues (domains) in the matrix + * @adm_max: max domain number in @adm + * @adm identifies the AP control domains in the matrix + */ +struct ap_matrix { + unsigned long apm_max; + DECLARE_BITMAP(apm, 256); + unsigned long aqm_max; + DECLARE_BITMAP(aqm, 256); + unsigned long adm_max; + DECLARE_BITMAP(adm, 256); +}; + +/** + * struct ap_matrix_mdev - the mediated matrix device structure + * @list: allows the ap_matrix_mdev struct to be added to a list + * @matrix: the adapters, usage domains and control domains assigned to the + * mediated matrix device. + */ +struct ap_matrix_mdev { + struct list_head node; + struct ap_matrix matrix; +}; + +extern int vfio_ap_mdev_register(void); +extern void vfio_ap_mdev_unregister(void); + #endif /* _VFIO_AP_PRIVATE_H_ */ diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 1aa7b82e8169..bfbe2be8f369 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -215,6 +215,7 @@ struct vfio_device_info { #define VFIO_DEVICE_API_PLATFORM_STRING "vfio-platform" #define VFIO_DEVICE_API_AMBA_STRING "vfio-amba" #define VFIO_DEVICE_API_CCW_STRING "vfio-ccw" +#define VFIO_DEVICE_API_AP_STRING "vfio-ap" /** * VFIO_DEVICE_GET_REGION_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 8, From patchwork Tue Sep 25 23:16:21 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614923 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 7CB2D16B1 for ; Tue, 25 Sep 2018 23:17:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6C69B2A9A2 for ; Tue, 25 Sep 2018 23:17:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6088E2AE17; Tue, 25 Sep 2018 23:17:25 +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 8316C2A9A2 for ; Tue, 25 Sep 2018 23:17:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727017AbeIZF1Q (ORCPT ); Wed, 26 Sep 2018 01:27:16 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:57460 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726440AbeIZF1O (ORCPT ); Wed, 26 Sep 2018 01:27:14 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNET1N073103 for ; Tue, 25 Sep 2018 19:17:21 -0400 Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mqukppnrv-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:17:20 -0400 Received: from localhost by e33.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) Tue, 25 Sep 2018 17:17:17 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNHEf621627098 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:17:14 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 85276136060; Tue, 25 Sep 2018 17:17:14 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6590713605E; Tue, 25 Sep 2018 17:17:11 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:17:11 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 06/26] s390: vfio-ap: sysfs interfaces to configure adapters Date: Tue, 25 Sep 2018 19:16:21 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0036-0000-0000-00000A3EBF05 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:17:19 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0037-0000-0000-000049117EC3 Message-Id: <20180925231641.4954-7-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak Introduces two new sysfs attributes for the VFIO mediated matrix device for assigning AP adapters to and unassigning AP adapters from a mediated matrix device. The IDs of the AP adapters assigned to the mediated matrix device will be stored in an AP mask (APM). The bits in the APM, from most significant to least significant bit, correspond to AP adapter IDs (APID) 0 to 255. On some systems, the maximum allowable adapter number may be less than 255 - depending upon the host's AP configuration - and assignment may be rejected if the input adapter ID exceeds the limit. When an adapter is assigned, the bit corresponding to the APID will be set in the APM. Likewise, when an adapter is unassigned, the bit corresponding to the APID will be cleared from the APM. In order to successfully assign an adapter, the APQNs derived from the adapter ID being assigned and the queue indexes of all domains previously assigned: 1. Must be bound to the vfio_ap device driver. 2. Must not be assigned to any other mediated matrix device If there are no domains assigned to the mdev, then there must be an AP queue bound to the vfio_ap device driver with an APQN containing the APID, otherwise all domains subsequently assigned will fail because there will be no AP queues bound with an APQN containing the adapter ID. Assigning or un-assigning an AP adapter will be rejected if a guest using the mediated matrix device is running. The relevant sysfs structures are: /sys/devices/vfio_ap/matrix/ ...... [mdev_supported_types] ......... [vfio_ap-passthrough] ............ [devices] ...............[$uuid] .................. assign_adapter .................. unassign_adapter To assign an adapter to the $uuid mediated matrix device's APM, write the APID to the assign_adapter file. To unassign an adapter, write the APID to the unassign_adapter file. The APID is specified using conventional semantics: If it begins with 0x the number will be parsed as a hexadecimal number; if it begins with a 0 the number will be parsed as an octal number; otherwise, it will be parsed as a decimal number. For example, to assign adapter 173 (0xad) to the mediated matrix device $uuid: echo 173 > assign_adapter or echo 0xad > assign_adapter or echo 0255 > assign_adapter To unassign adapter 173 (0xad): echo 173 > unassign_adapter or echo 0xad > unassign_adapter or echo 0255 > unassign_adapter Signed-off-by: Tony Krowiak Reviewed-by: Halil Pasic Tested-by: Michael Mueller Tested-by: Farhan Ali Tested-by: Pierre Morel Reviewed-by: Cornelia Huck --- drivers/s390/crypto/vfio_ap_ops.c | 291 ++++++++++++++++++++++++++++++ 1 file changed, 291 insertions(+) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 99ed30315f56..15c5bc02c389 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -106,9 +106,300 @@ static struct attribute_group *vfio_ap_mdev_type_groups[] = { NULL, }; +struct vfio_ap_queue_reserved { + unsigned long *apid; + unsigned long *apqi; + bool reserved; +}; + +/** + * vfio_ap_has_queue + * + * @dev: an AP queue device + * @data: a struct vfio_ap_queue_reserved reference + * + * Flags whether the AP queue device (@dev) has a queue ID containing the APQN, + * apid or apqi specified in @data: + * + * - If @data contains both an apid and apqi value, then @data will be flagged + * as reserved if the APID and APQI fields for the AP queue device matches + * + * - If @data contains only an apid value, @data will be flagged as + * reserved if the APID field in the AP queue device matches + * + * - If @data contains only an apqi value, @data will be flagged as + * reserved if the APQI field in the AP queue device matches + * + * Returns 0 to indicate the input to function succeeded. Returns -EINVAL if + * @data does not contain either an apid or apqi. + */ +static int vfio_ap_has_queue(struct device *dev, void *data) +{ + struct vfio_ap_queue_reserved *qres = data; + struct ap_queue *ap_queue = to_ap_queue(dev); + ap_qid_t qid; + unsigned long id; + + if (qres->apid && qres->apqi) { + qid = AP_MKQID(*qres->apid, *qres->apqi); + if (qid == ap_queue->qid) + qres->reserved = true; + } else if (qres->apid && !qres->apqi) { + id = AP_QID_CARD(ap_queue->qid); + if (id == *qres->apid) + qres->reserved = true; + } else if (!qres->apid && qres->apqi) { + id = AP_QID_QUEUE(ap_queue->qid); + if (id == *qres->apqi) + qres->reserved = true; + } else { + return -EINVAL; + } + + return 0; +} + +/** + * vfio_ap_verify_queue_reserved + * + * @matrix_dev: a mediated matrix device + * @apid: an AP adapter ID + * @apqi: an AP queue index + * + * Verifies that the AP queue with @apid/@apqi is reserved by the VFIO AP device + * driver according to the following rules: + * + * - If both @apid and @apqi are not NULL, then there must be an AP queue + * device bound to the vfio_ap driver with the APQN identified by @apid and + * @apqi + * + * - If only @apid is not NULL, then there must be an AP queue device bound + * to the vfio_ap driver with an APQN containing @apid + * + * - If only @apqi is not NULL, then there must be an AP queue device bound + * to the vfio_ap driver with an APQN containing @apqi + * + * Returns 0 if the AP queue is reserved; otherwise, returns -EADDRNOTAVAIL. + */ +static int vfio_ap_verify_queue_reserved(unsigned long *apid, + unsigned long *apqi) +{ + int ret; + struct vfio_ap_queue_reserved qres; + + qres.apid = apid; + qres.apqi = apqi; + qres.reserved = false; + + ret = driver_for_each_device(matrix_dev->device.driver, NULL, &qres, + vfio_ap_has_queue); + if (ret) + return ret; + + if (qres.reserved) + return 0; + + return -EADDRNOTAVAIL; +} + +static int +vfio_ap_mdev_verify_queues_reserved_for_apid(struct ap_matrix_mdev *matrix_mdev, + unsigned long apid) +{ + int ret; + unsigned long apqi; + unsigned long nbits = matrix_mdev->matrix.aqm_max + 1; + + if (find_first_bit_inv(matrix_mdev->matrix.aqm, nbits) >= nbits) + return vfio_ap_verify_queue_reserved(&apid, NULL); + + for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm, nbits) { + ret = vfio_ap_verify_queue_reserved(&apid, &apqi); + if (ret) + return ret; + } + + return 0; +} + +/** + * vfio_ap_mdev_verify_no_sharing + * + * Verifies that the APQNs derived from the cross product of the AP adapter IDs + * and AP queue indexes comprising the AP matrix are not configured for another + * mediated device. AP queue sharing is not allowed. + * + * @matrix_mdev: the mediated matrix device + * + * Returns 0 if the APQNs are not shared, otherwise; returns -EADDRINUSE. + */ +static int vfio_ap_mdev_verify_no_sharing(struct ap_matrix_mdev *matrix_mdev) +{ + struct ap_matrix_mdev *lstdev; + DECLARE_BITMAP(apm, AP_DEVICES); + DECLARE_BITMAP(aqm, AP_DOMAINS); + + list_for_each_entry(lstdev, &matrix_dev->mdev_list, node) { + if (matrix_mdev == lstdev) + continue; + + memset(apm, 0, sizeof(apm)); + memset(aqm, 0, sizeof(aqm)); + + /* + * We work on full longs, as we can only exclude the leftover + * bits in non-inverse order. The leftover is all zeros. + */ + if (!bitmap_and(apm, matrix_mdev->matrix.apm, + lstdev->matrix.apm,AP_DEVICES)) + continue; + + if (!bitmap_and(aqm, matrix_mdev->matrix.aqm, + lstdev->matrix.aqm, AP_DOMAINS)) + continue; + + return -EADDRINUSE; + } + + return 0; +} + +/** + * assign_adapter_store + * + * @dev: the matrix device + * @attr: the mediated matrix device's assign_adapter attribute + * @buf: a buffer containing the AP adapter number (APID) to + * be assigned + * @count: the number of bytes in @buf + * + * Parses the APID from @buf and sets the corresponding bit in the mediated + * matrix device's APM. + * + * Returns the number of bytes processed if the APID is valid; otherwise, + * returns one of the following errors: + * + * 1. -EINVAL + * The APID is not a valid number + * + * 2. -ENODEV + * The APID exceeds the maximum value configured for the system + * + * 3. -EADDRNOTAVAIL + * An APQN derived from the cross product of the APID being assigned + * and the APQIs previously assigned is not bound to the vfio_ap device + * driver; or, if no APQIs have yet been assigned, the APID is not + * contained in an APQN bound to the vfio_ap device driver. + * + * 4. -EADDRINUSE + * An APQN derived from the cross product of the APID being assigned + * and the APQIs previously assigned is being used by another mediated + * matrix device + */ +static ssize_t assign_adapter_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int ret; + unsigned long apid; + struct mdev_device *mdev = mdev_from_dev(dev); + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + + ret = kstrtoul(buf, 0, &apid); + if (ret) + return ret; + + if (apid > matrix_mdev->matrix.apm_max) + return -ENODEV; + + /* Set the bit in the AP mask (APM) corresponding to the AP adapter + * number (APID). The bits in the mask, from most significant to least + * significant bit, correspond to APIDs 0-255. + */ + mutex_lock(&matrix_dev->lock); + + ret = vfio_ap_mdev_verify_queues_reserved_for_apid(matrix_mdev, apid); + if (ret) + goto done; + + set_bit_inv(apid, matrix_mdev->matrix.apm); + + ret = vfio_ap_mdev_verify_no_sharing(matrix_mdev); + if (ret) + goto share_err; + + ret = count; + goto done; + +share_err: + clear_bit_inv(apid, matrix_mdev->matrix.apm); +done: + mutex_unlock(&matrix_dev->lock); + + return ret; +} +static DEVICE_ATTR_WO(assign_adapter); + +/** + * unassign_adapter_store + * + * @dev: the matrix device + * @attr: the mediated matrix device's unassign_adapter attribute + * @buf: a buffer containing the adapter number (APID) to be unassigned + * @count: the number of bytes in @buf + * + * Parses the APID from @buf and clears the corresponding bit in the mediated + * matrix device's APM. + * + * Returns the number of bytes processed if the APID is valid; otherwise, + * returns one of the following errors: + * -EINVAL if the APID is not a number + * -ENODEV if the APID it exceeds the maximum value configured for the + * system + */ +static ssize_t unassign_adapter_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int ret; + unsigned long apid; + struct mdev_device *mdev = mdev_from_dev(dev); + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + + ret = kstrtoul(buf, 0, &apid); + if (ret) + return ret; + + if (apid > matrix_mdev->matrix.apm_max) + return -ENODEV; + + mutex_lock(&matrix_dev->lock); + clear_bit_inv((unsigned long)apid, matrix_mdev->matrix.apm); + mutex_unlock(&matrix_dev->lock); + + return count; +} +DEVICE_ATTR_WO(unassign_adapter); + +static struct attribute *vfio_ap_mdev_attrs[] = { + &dev_attr_assign_adapter.attr, + &dev_attr_unassign_adapter.attr, + NULL +}; + +static struct attribute_group vfio_ap_mdev_attr_group = { + .attrs = vfio_ap_mdev_attrs +}; + +static const struct attribute_group *vfio_ap_mdev_attr_groups[] = { + &vfio_ap_mdev_attr_group, + NULL +}; + static const struct mdev_parent_ops vfio_ap_matrix_ops = { .owner = THIS_MODULE, .supported_type_groups = vfio_ap_mdev_type_groups, + .mdev_attr_groups = vfio_ap_mdev_attr_groups, .create = vfio_ap_mdev_create, .remove = vfio_ap_mdev_remove, }; From patchwork Tue Sep 25 23:16:22 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614925 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 A0681913 for ; Tue, 25 Sep 2018 23:17:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8F1CE2A9A2 for ; Tue, 25 Sep 2018 23:17:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 81A972AE17; Tue, 25 Sep 2018 23:17:32 +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 C81EA2A9A2 for ; Tue, 25 Sep 2018 23:17:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726994AbeIZF1X (ORCPT ); Wed, 26 Sep 2018 01:27:23 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:49878 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727055AbeIZF1V (ORCPT ); Wed, 26 Sep 2018 01:27:21 -0400 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNEXfR050123 for ; Tue, 25 Sep 2018 19:17:27 -0400 Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) by mx0b-001b2d01.pphosted.com with ESMTP id 2mqvvqkjmx-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:17:27 -0400 Received: from localhost by e33.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) Tue, 25 Sep 2018 17:17:22 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNHJxL42336492 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:17:19 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DFA92136051; Tue, 25 Sep 2018 17:17:18 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BEE56136065; Tue, 25 Sep 2018 17:17:15 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:17:15 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 07/26] s390: vfio-ap: sysfs interfaces to configure domains Date: Tue, 25 Sep 2018 19:16:22 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0036-0000-0000-00000A3EBF06 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:17:24 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0037-0000-0000-000049117ECD Message-Id: <20180925231641.4954-8-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak Introduces two new sysfs attributes for the VFIO mediated matrix device for assigning AP domains to and unassigning AP domains from a mediated matrix device. The IDs of the AP domains assigned to the mediated matrix device will be stored in an AP queue mask (AQM). The bits in the AQM, from most significant to least significant bit, correspond to AP queue index (APQI) 0 to 255 (note that an APQI is synonymous with with a domain ID). On some systems, the maximum allowable domain number may be less than 255 - depending upon the host's AP configuration - and assignment may be rejected if the input domain ID exceeds the limit. When a domain is assigned, the bit corresponding to the APQI will be set in the AQM. Likewise, when a domain is unassigned, the bit corresponding to the APQI will be cleared from the AQM. In order to successfully assign a domain, the APQNs derived from the domain ID being assigned and the adapter numbers of all adapters previously assigned: 1. Must be bound to the vfio_ap device driver. 2. Must not be assigned to any other mediated matrix device. If there are no adapters assigned to the mdev, then there must be an AP queue bound to the vfio_ap device driver with an APQN containing the domain ID (i.e., APQI), otherwise all adapters subsequently assigned will fail because there will be no AP queues bound with an APQN containing the APQI. Assigning or un-assigning an AP domain will also be rejected if a guest using the mediated matrix device is running. The relevant sysfs structures are: /sys/devices/vfio_ap/matrix/ ...... [mdev_supported_types] ......... [vfio_ap-passthrough] ............ [devices] ...............[$uuid] .................. assign_domain .................. unassign_domain To assign a domain to the $uuid mediated matrix device, write the domain's ID to the assign_domain file. To unassign a domain, write the domain's ID to the unassign_domain file. The ID is specified using conventional semantics: If it begins with 0x, the number will be parsed as a hexadecimal (case insensitive) number; if it begins with 0, it will be parsed as an octal number; otherwise, it will be parsed as a decimal number. For example, to assign domain 173 (0xad) to the mediated matrix device $uuid: echo 173 > assign_domain or echo 0255 > assign_domain or echo 0xad > assign_domain To unassign domain 173 (0xad): echo 173 > unassign_domain or echo 0255 > unassign_domain or echo 0xad > unassign_domain Signed-off-by: Tony Krowiak Reviewed-by: Halil Pasic Reviewed-by: Cornelia Huck Tested-by: Michael Mueller Tested-by: Farhan Ali Tested-by: Pierre Morel --- drivers/s390/crypto/vfio_ap_ops.c | 138 +++++++++++++++++++++++++++++- 1 file changed, 137 insertions(+), 1 deletion(-) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 15c5bc02c389..6f658836fb05 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -381,10 +381,146 @@ static ssize_t unassign_adapter_store(struct device *dev, } DEVICE_ATTR_WO(unassign_adapter); +static int +vfio_ap_mdev_verify_queues_reserved_for_apqi(struct ap_matrix_mdev *matrix_mdev, + unsigned long apqi) +{ + int ret; + unsigned long apid; + unsigned long nbits = matrix_mdev->matrix.apm_max + 1; + + if (find_first_bit_inv(matrix_mdev->matrix.apm, nbits) >= nbits) + return vfio_ap_verify_queue_reserved(NULL, &apqi); + + for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, nbits) { + ret = vfio_ap_verify_queue_reserved(&apid, &apqi); + if (ret) + return ret; + } + + return 0; +} + +/** + * assign_domain_store + * + * @dev: the matrix device + * @attr: the mediated matrix device's assign_domain attribute + * @buf: a buffer containing the AP queue index (APQI) of the domain to + * be assigned + * @count: the number of bytes in @buf + * + * Parses the APQI from @buf and sets the corresponding bit in the mediated + * matrix device's AQM. + * + * Returns the number of bytes processed if the APQI is valid; otherwise returns + * one of the following errors: + * + * 1. -EINVAL + * The APQI is not a valid number + * + * 2. -ENODEV + * The APQI exceeds the maximum value configured for the system + * + * 3. -EADDRNOTAVAIL + * An APQN derived from the cross product of the APQI being assigned + * and the APIDs previously assigned is not bound to the vfio_ap device + * driver; or, if no APIDs have yet been assigned, the APQI is not + * contained in an APQN bound to the vfio_ap device driver. + * + * 4. -EADDRINUSE + * An APQN derived from the cross product of the APQI being assigned + * and the APIDs previously assigned is being used by another mediated + * matrix device + */ +static ssize_t assign_domain_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int ret; + unsigned long apqi; + struct mdev_device *mdev = mdev_from_dev(dev); + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + unsigned long max_apqi = matrix_mdev->matrix.aqm_max; + + ret = kstrtoul(buf, 0, &apqi); + if (ret) + return ret; + if (apqi > max_apqi) + return -ENODEV; + + mutex_lock(&matrix_dev->lock); + + ret = vfio_ap_mdev_verify_queues_reserved_for_apqi(matrix_mdev, apqi); + if (ret) + goto done; + + set_bit_inv(apqi, matrix_mdev->matrix.aqm); + + ret = vfio_ap_mdev_verify_no_sharing(matrix_mdev); + if (ret) + goto share_err; + + ret = count; + goto done; + +share_err: + clear_bit_inv(apqi, matrix_mdev->matrix.aqm); +done: + mutex_unlock(&matrix_dev->lock); + + return ret; +} +DEVICE_ATTR_WO(assign_domain); + + +/** + * unassign_domain_store + * + * @dev: the matrix device + * @attr: the mediated matrix device's unassign_domain attribute + * @buf: a buffer containing the AP queue index (APQI) of the domain to + * be unassigned + * @count: the number of bytes in @buf + * + * Parses the APQI from @buf and clears the corresponding bit in the + * mediated matrix device's AQM. + * + * Returns the number of bytes processed if the APQI is valid; otherwise, + * returns one of the following errors: + * -EINVAL if the APQI is not a number + * -ENODEV if the APQI exceeds the maximum value configured for the system + */ +static ssize_t unassign_domain_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int ret; + unsigned long apqi; + struct mdev_device *mdev = mdev_from_dev(dev); + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + + ret = kstrtoul(buf, 0, &apqi); + if (ret) + return ret; + + if (apqi > matrix_mdev->matrix.aqm_max) + return -ENODEV; + + mutex_lock(&matrix_dev->lock); + clear_bit_inv((unsigned long)apqi, matrix_mdev->matrix.aqm); + mutex_unlock(&matrix_dev->lock); + + return count; +} +DEVICE_ATTR_WO(unassign_domain); + static struct attribute *vfio_ap_mdev_attrs[] = { &dev_attr_assign_adapter.attr, &dev_attr_unassign_adapter.attr, - NULL + &dev_attr_assign_domain.attr, + &dev_attr_unassign_domain.attr, + NULL, }; static struct attribute_group vfio_ap_mdev_attr_group = { From patchwork Tue Sep 25 23:16:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614963 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 4BC5A913 for ; Tue, 25 Sep 2018 23:19:49 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3AD682AB65 for ; 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 25 Sep 2018 17:17:26 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNHNuk46923992 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:17:23 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 31591136051; Tue, 25 Sep 2018 17:17:23 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2505B13604F; Tue, 25 Sep 2018 17:17:20 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:17:19 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 08/26] s390: vfio-ap: sysfs interfaces to configure control domains Date: Tue, 25 Sep 2018 19:16:23 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0036-0000-0000-00000A3EBF08 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:17:28 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0037-0000-0000-000049117EDA Message-Id: <20180925231641.4954-9-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak Provides the sysfs interfaces for: 1. Assigning AP control domains to the mediated matrix device 2. Unassigning AP control domains from a mediated matrix device 3. Displaying the control domains assigned to a mediated matrix device The IDs of the AP control domains assigned to the mediated matrix device are stored in an AP domain mask (ADM). The bits in the ADM, from most significant to least significant bit, correspond to AP domain numbers 0 to 255. On some systems, the maximum allowable domain number may be less than 255 - depending upon the host's AP configuration - and assignment may be rejected if the input domain ID exceeds the limit. When a control domain is assigned, the bit corresponding its domain ID will be set in the ADM. Likewise, when a domain is unassigned, the bit corresponding to its domain ID will be cleared in the ADM. The relevant sysfs structures are: /sys/devices/vfio_ap/matrix/ ...... [mdev_supported_types] ......... [vfio_ap-passthrough] ............ [devices] ...............[$uuid] .................. assign_control_domain .................. unassign_control_domain To assign a control domain to the $uuid mediated matrix device's ADM, write its domain number to the assign_control_domain file. To unassign a domain, write its domain number to the unassign_control_domain file. The domain number is specified using conventional semantics: If it begins with 0x the number will be parsed as a hexadecimal (case insensitive) number; if it begins with 0, it is parsed as an octal number; otherwise, it will be parsed as a decimal number. For example, to assign control domain 173 (0xad) to the mediated matrix device $uuid: echo 173 > assign_control_domain or echo 0255 > assign_control_domain or echo 0xad > assign_control_domain To unassign control domain 173 (0xad): echo 173 > unassign_control_domain or echo 0255 > unassign_control_domain or echo 0xad > unassign_control_domain The assignment will be rejected if the APQI exceeds the maximum value for an AP domain: * If the AP Extended Addressing (APXA) facility is installed, the max value is 255 * Else the max value is 15 Signed-off-by: Tony Krowiak Reviewed-by: Halil Pasic Reviewed-by: Cornelia Huck Tested-by: Michael Mueller Tested-by: Farhan Ali Tested-by: Pierre Morel --- drivers/s390/crypto/vfio_ap_ops.c | 112 ++++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 6f658836fb05..cd5a2aa7a51a 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -515,11 +515,123 @@ static ssize_t unassign_domain_store(struct device *dev, } DEVICE_ATTR_WO(unassign_domain); +/** + * assign_control_domain_store + * + * @dev: the matrix device + * @attr: the mediated matrix device's assign_control_domain attribute + * @buf: a buffer containing the domain ID to be assigned + * @count: the number of bytes in @buf + * + * Parses the domain ID from @buf and sets the corresponding bit in the mediated + * matrix device's ADM. + * + * Returns the number of bytes processed if the domain ID is valid; otherwise, + * returns one of the following errors: + * -EINVAL if the ID is not a number + * -ENODEV if the ID exceeds the maximum value configured for the system + */ +static ssize_t assign_control_domain_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int ret; + unsigned long id; + struct mdev_device *mdev = mdev_from_dev(dev); + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + + ret = kstrtoul(buf, 0, &id); + if (ret) + return ret; + + if (id > matrix_mdev->matrix.adm_max) + return -ENODEV; + + /* Set the bit in the ADM (bitmask) corresponding to the AP control + * domain number (id). The bits in the mask, from most significant to + * least significant, correspond to IDs 0 up to the one less than the + * number of control domains that can be assigned. + */ + mutex_lock(&matrix_dev->lock); + set_bit_inv(id, matrix_mdev->matrix.adm); + mutex_unlock(&matrix_dev->lock); + + return count; +} +DEVICE_ATTR_WO(assign_control_domain); + +/** + * unassign_control_domain_store + * + * @dev: the matrix device + * @attr: the mediated matrix device's unassign_control_domain attribute + * @buf: a buffer containing the domain ID to be unassigned + * @count: the number of bytes in @buf + * + * Parses the domain ID from @buf and clears the corresponding bit in the + * mediated matrix device's ADM. + * + * Returns the number of bytes processed if the domain ID is valid; otherwise, + * returns one of the following errors: + * -EINVAL if the ID is not a number + * -ENODEV if the ID exceeds the maximum value configured for the system + */ +static ssize_t unassign_control_domain_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int ret; + unsigned long domid; + struct mdev_device *mdev = mdev_from_dev(dev); + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + unsigned long max_domid = matrix_mdev->matrix.adm_max; + + ret = kstrtoul(buf, 0, &domid); + if (ret) + return ret; + if (domid > max_domid) + return -ENODEV; + + mutex_lock(&matrix_dev->lock); + clear_bit_inv(domid, matrix_mdev->matrix.adm); + mutex_unlock(&matrix_dev->lock); + + return count; +} +DEVICE_ATTR_WO(unassign_control_domain); + +static ssize_t control_domains_show(struct device *dev, + struct device_attribute *dev_attr, + char *buf) +{ + unsigned long id; + int nchars = 0; + int n; + char *bufpos = buf; + struct mdev_device *mdev = mdev_from_dev(dev); + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + unsigned long max_domid = matrix_mdev->matrix.adm_max; + + mutex_lock(&matrix_dev->lock); + for_each_set_bit_inv(id, matrix_mdev->matrix.adm, max_domid + 1) { + n = sprintf(bufpos, "%04lx\n", id); + bufpos += n; + nchars += n; + } + mutex_unlock(&matrix_dev->lock); + + return nchars; +} +DEVICE_ATTR_RO(control_domains); + static struct attribute *vfio_ap_mdev_attrs[] = { &dev_attr_assign_adapter.attr, &dev_attr_unassign_adapter.attr, &dev_attr_assign_domain.attr, &dev_attr_unassign_domain.attr, + &dev_attr_assign_control_domain.attr, + &dev_attr_unassign_control_domain.attr, + &dev_attr_control_domains.attr, NULL, }; From patchwork Tue Sep 25 23:16:24 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614927 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 B4321913 for ; Tue, 25 Sep 2018 23:17:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A3B852AE17 for ; Tue, 25 Sep 2018 23:17:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 95EFE2AE29; Tue, 25 Sep 2018 23:17:42 +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 201B22A9A2 for ; Tue, 25 Sep 2018 23:17:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727182AbeIZF13 (ORCPT ); Wed, 26 Sep 2018 01:27:29 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:34346 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727057AbeIZF12 (ORCPT ); Wed, 26 Sep 2018 01:27:28 -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 w8PNEUx2040720 for ; Tue, 25 Sep 2018 19:17:34 -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 2mqwvv1abg-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:17:34 -0400 Received: from localhost by e31.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 25 Sep 2018 17:17:32 -0600 Received: from b03cxnp07029.gho.boulder.ibm.com (9.17.130.16) by e31.co.us.ibm.com (192.168.1.131) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 25 Sep 2018 17:17:30 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNHRH830539780 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:17:27 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6998713605E; Tue, 25 Sep 2018 17:17:27 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6BE6C13604F; Tue, 25 Sep 2018 17:17:24 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:17:24 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 09/26] s390: vfio-ap: sysfs interface to view matrix mdev matrix Date: Tue, 25 Sep 2018 19:16:24 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-8235-0000-0000-00000E06BFC0 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873679; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:17:32 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-8236-0000-0000-000042C596C9 Message-Id: <20180925231641.4954-10-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak Provides a sysfs interface to view the AP matrix configured for the mediated matrix device. The relevant sysfs structures are: /sys/devices/vfio_ap/matrix/ ...... [mdev_supported_types] ......... [vfio_ap-passthrough] ............ [devices] ...............[$uuid] .................. matrix To view the matrix configured for the mediated matrix device, print the matrix file: cat matrix Below are examples of the output from the above command: Example 1: Adapters and domains assigned Assignments: Adapters 5 and 6 Domains 4 and 71 (0x47) Output 05.0004 05.0047 06.0004 06.0047 Examples 2: Only adapters assigned Assignments: Adapters 5 and 6 Output: 05. 06. Examples 3: Only domains assigned Assignments: Domains 4 and 71 (0x47) Output: .0004 .0047 Signed-off-by: Tony Krowiak Reviewed-by: Halil Pasic Reviewed-by: Cornelia Huck Tested-by: Michael Mueller Tested-by: Farhan Ali Tested-by: Pierre Morel --- drivers/s390/crypto/vfio_ap_ops.c | 51 +++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index cd5a2aa7a51a..61a5fa7ad40d 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -624,6 +624,56 @@ static ssize_t control_domains_show(struct device *dev, } DEVICE_ATTR_RO(control_domains); +static ssize_t matrix_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct mdev_device *mdev = mdev_from_dev(dev); + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + char *bufpos = buf; + unsigned long apid; + unsigned long apqi; + unsigned long apid1; + unsigned long apqi1; + unsigned long napm_bits = matrix_mdev->matrix.apm_max + 1; + unsigned long naqm_bits = matrix_mdev->matrix.aqm_max + 1; + int nchars = 0; + int n; + + apid1 = find_first_bit_inv(matrix_mdev->matrix.apm, napm_bits); + apqi1 = find_first_bit_inv(matrix_mdev->matrix.aqm, naqm_bits); + + mutex_lock(&matrix_dev->lock); + + if ((apid1 < napm_bits) && (apqi1 < naqm_bits)) { + for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, napm_bits) { + for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm, + naqm_bits) { + n = sprintf(bufpos, "%02lx.%04lx\n", apid, + apqi); + bufpos += n; + nchars += n; + } + } + } else if (apid1 < napm_bits) { + for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, napm_bits) { + n = sprintf(bufpos, "%02lx.\n", apid); + bufpos += n; + nchars += n; + } + } else if (apqi1 < naqm_bits) { + for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm, naqm_bits) { + n = sprintf(bufpos, ".%04lx\n", apqi); + bufpos += n; + nchars += n; + } + } + + mutex_unlock(&matrix_dev->lock); + + return nchars; +} +DEVICE_ATTR_RO(matrix); + static struct attribute *vfio_ap_mdev_attrs[] = { &dev_attr_assign_adapter.attr, &dev_attr_unassign_adapter.attr, @@ -632,6 +682,7 @@ static struct attribute *vfio_ap_mdev_attrs[] = { &dev_attr_assign_control_domain.attr, &dev_attr_unassign_control_domain.attr, &dev_attr_control_domains.attr, + &dev_attr_matrix.attr, NULL, }; From patchwork Tue Sep 25 23:16:25 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614929 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 D005B180E for ; Tue, 25 Sep 2018 23:17:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C06EF2A9A2 for ; Tue, 25 Sep 2018 23:17:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B078A2AE33; Tue, 25 Sep 2018 23:17:42 +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 577E62ADF6 for ; Tue, 25 Sep 2018 23:17:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727203AbeIZF1e (ORCPT ); Wed, 26 Sep 2018 01:27:34 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:54352 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726319AbeIZF1e (ORCPT ); Wed, 26 Sep 2018 01:27:34 -0400 Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNEUKs022207 for ; Tue, 25 Sep 2018 19:17:40 -0400 Received: from e35.co.us.ibm.com (e35.co.us.ibm.com [32.97.110.153]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mqtmp9eku-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:17:39 -0400 Received: from localhost by e35.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) Tue, 25 Sep 2018 17:17:34 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp07028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNHVjt63569956 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:17:31 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A2A37136051; Tue, 25 Sep 2018 17:17:31 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A400613604F; Tue, 25 Sep 2018 17:17:28 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:17:28 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 10/26] KVM: s390: interfaces to clear CRYCB masks Date: Tue, 25 Sep 2018 19:16:25 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0012-0000-0000-000016BBBFA5 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:17:37 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0013-0000-0000-00005488998D Message-Id: <20180925231641.4954-11-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=974 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak Introduces a new KVM function to clear the APCB0 and APCB1 in the guest's CRYCB. This effectively clears all bits of the APM, AQM and ADM masks configured for the guest. The VCPUs are taken out of SIE to ensure the VCPUs do not get out of sync. Signed-off-by: Tony Krowiak Acked-by: Halil Pasic Tested-by: Michael Mueller Tested-by: Farhan Ali Tested-by: Pierre Morel Reviewed-by: Cornelia Huck --- arch/s390/include/asm/kvm_host.h | 2 ++ arch/s390/kvm/kvm-s390.c | 15 +++++++++++++++ 2 files changed, 17 insertions(+) diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 79fa0a3a777f..0a78036a802b 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -859,6 +859,8 @@ 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 d62f6d840f8c..75aa5aa4a926 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); + static u64 kvm_s390_get_initial_cpuid(void) { struct cpuid cpuid; From patchwork Tue Sep 25 23:16:26 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614961 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 51F25913 for ; Tue, 25 Sep 2018 23:19:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 426442AB65 for ; Tue, 25 Sep 2018 23:19:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 361BA2AB75; Tue, 25 Sep 2018 23:19:41 +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 6B0722AB65 for ; Tue, 25 Sep 2018 23:19:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727241AbeIZF1j (ORCPT ); Wed, 26 Sep 2018 01:27:39 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:34626 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727238AbeIZF1h (ORCPT ); Wed, 26 Sep 2018 01:27:37 -0400 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNEUVv060367 for ; Tue, 25 Sep 2018 19:17:43 -0400 Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mqvmhm11q-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:17:43 -0400 Received: from localhost by e33.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 25 Sep 2018 17:17:42 -0600 Received: from b03cxnp08028.gho.boulder.ibm.com (9.17.130.20) by e33.co.us.ibm.com (192.168.1.133) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 25 Sep 2018 17:17:39 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNHagj22478860 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:17:36 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F0218136051; Tue, 25 Sep 2018 17:17:35 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DE19213604F; Tue, 25 Sep 2018 17:17:32 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:17:32 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 11/26] s390: vfio-ap: implement mediated device open callback Date: Tue, 25 Sep 2018 19:16:26 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0036-0000-0000-00000A3EBF10 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:17:41 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0037-0000-0000-000049117EFA Message-Id: <20180925231641.4954-12-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak Implements the open callback on the mediated matrix device. The function registers a group notifier to receive notification of the VFIO_GROUP_NOTIFY_SET_KVM event. When notified, the vfio_ap device driver will get access to the guest's kvm structure. The open callback must ensure that only one mediated device shall be opened per guest. Signed-off-by: Tony Krowiak Acked-by: Halil Pasic Tested-by: Michael Mueller Tested-by: Farhan Ali Tested-by: Pierre Morel Acked-by: Pierre Morel Reviewed-by: Cornelia Huck --- arch/s390/include/asm/kvm_host.h | 1 + drivers/s390/crypto/vfio_ap_ops.c | 159 ++++++++++++++++++++++++++ drivers/s390/crypto/vfio_ap_private.h | 5 + 3 files changed, 165 insertions(+) diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 0a78036a802b..36d35313e840 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -258,6 +258,7 @@ struct kvm_s390_sie_block { __u64 tecmc; /* 0x00e8 */ __u8 reservedf0[12]; /* 0x00f0 */ #define CRYCB_FORMAT_MASK 0x00000003 +#define CRYCB_FORMAT0 0x00000000 #define CRYCB_FORMAT1 0x00000001 #define CRYCB_FORMAT2 0x00000003 __u32 crycbd; /* 0x00fc */ diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 61a5fa7ad40d..89fbcde8dc98 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -13,6 +13,10 @@ #include #include #include +#include +#include +#include +#include #include #include "vfio_ap_private.h" @@ -54,6 +58,9 @@ static int vfio_ap_mdev_remove(struct mdev_device *mdev) { struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + if (matrix_mdev->kvm) + return -EBUSY; + mutex_lock(&matrix_dev->lock); list_del(&matrix_mdev->node); mutex_unlock(&matrix_dev->lock); @@ -305,6 +312,10 @@ static ssize_t assign_adapter_store(struct device *dev, struct mdev_device *mdev = mdev_from_dev(dev); struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + /* If the guest is running, disallow assignment of adapter */ + if (matrix_mdev->kvm) + return -EBUSY; + ret = kstrtoul(buf, 0, &apid); if (ret) return ret; @@ -366,6 +377,10 @@ static ssize_t unassign_adapter_store(struct device *dev, struct mdev_device *mdev = mdev_from_dev(dev); struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + /* If the guest is running, disallow un-assignment of adapter */ + if (matrix_mdev->kvm) + return -EBUSY; + ret = kstrtoul(buf, 0, &apid); if (ret) return ret; @@ -443,6 +458,10 @@ static ssize_t assign_domain_store(struct device *dev, struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); unsigned long max_apqi = matrix_mdev->matrix.aqm_max; + /* If the guest is running, disallow assignment of domain */ + if (matrix_mdev->kvm) + return -EBUSY; + ret = kstrtoul(buf, 0, &apqi); if (ret) return ret; @@ -500,6 +519,10 @@ static ssize_t unassign_domain_store(struct device *dev, struct mdev_device *mdev = mdev_from_dev(dev); struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + /* If the guest is running, disallow un-assignment of domain */ + if (matrix_mdev->kvm) + return -EBUSY; + ret = kstrtoul(buf, 0, &apqi); if (ret) return ret; @@ -540,6 +563,10 @@ static ssize_t assign_control_domain_store(struct device *dev, struct mdev_device *mdev = mdev_from_dev(dev); struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + /* If the guest is running, disallow assignment of control domain */ + if (matrix_mdev->kvm) + return -EBUSY; + ret = kstrtoul(buf, 0, &id); if (ret) return ret; @@ -586,6 +613,10 @@ static ssize_t unassign_control_domain_store(struct device *dev, struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); unsigned long max_domid = matrix_mdev->matrix.adm_max; + /* If the guest is running, disallow un-assignment of control domain */ + if (matrix_mdev->kvm) + return -EBUSY; + ret = kstrtoul(buf, 0, &domid); if (ret) return ret; @@ -695,12 +726,140 @@ static const struct attribute_group *vfio_ap_mdev_attr_groups[] = { NULL }; +static void vfio_ap_mdev_copy_masks(struct ap_matrix_mdev *matrix_mdev) +{ + int nbytes; + unsigned long *apm, *aqm, *adm; + struct kvm_s390_crypto_cb *crycb = matrix_mdev->kvm->arch.crypto.crycb; + + switch (matrix_mdev->kvm->arch.crypto.crycbd & CRYCB_FORMAT_MASK) { + case CRYCB_FORMAT2: + apm = (unsigned long *)crycb->apcb1.apm; + aqm = (unsigned long *)crycb->apcb1.aqm; + adm = (unsigned long *)crycb->apcb1.adm; + break; + case CRYCB_FORMAT1: + case CRYCB_FORMAT0: + default: + apm = (unsigned long *)crycb->apcb0.apm; + aqm = (unsigned long *)crycb->apcb0.aqm; + adm = (unsigned long *)crycb->apcb0.adm; + break; + } + + nbytes = DIV_ROUND_UP(matrix_mdev->matrix.apm_max + 1, BITS_PER_BYTE); + memcpy(apm, matrix_mdev->matrix.apm, nbytes); + nbytes = DIV_ROUND_UP(matrix_mdev->matrix.aqm_max + 1, BITS_PER_BYTE); + memcpy(aqm, matrix_mdev->matrix.aqm, nbytes); + nbytes = DIV_ROUND_UP(matrix_mdev->matrix.adm_max + 1, BITS_PER_BYTE); + memcpy(adm, matrix_mdev->matrix.adm, nbytes); +} + +/** + * vfio_ap_mdev_set_kvm + * + * @matrix_mdev: a mediated matrix device + * @kvm: reference to KVM instance + * + * Verifies no other mediated matrix device has @kvm and sets a reference to + * it in @matrix_mdev->kvm. + * + * Return 0 if no other mediated matrix device has a reference to @kvm; + * otherwise, returns an -EPERM. + */ +static int vfio_ap_mdev_set_kvm(struct ap_matrix_mdev *matrix_mdev, + struct kvm *kvm) +{ + struct ap_matrix_mdev *m; + + mutex_lock(&matrix_dev->lock); + + list_for_each_entry(m, &matrix_dev->mdev_list, node) { + if ((m != matrix_mdev) && (m->kvm == kvm)) { + mutex_unlock(&matrix_dev->lock); + return -EPERM; + } + } + + matrix_mdev->kvm = kvm; + mutex_unlock(&matrix_dev->lock); + + return 0; +} + +static int vfio_ap_mdev_group_notifier(struct notifier_block *nb, + unsigned long action, void *data) +{ + int ret; + struct ap_matrix_mdev *matrix_mdev; + + if (action != VFIO_GROUP_NOTIFY_SET_KVM) + return NOTIFY_OK; + + matrix_mdev = container_of(nb, struct ap_matrix_mdev, group_notifier); + + if (!data) { + matrix_mdev->kvm = NULL; + return NOTIFY_OK; + } + + ret = vfio_ap_mdev_set_kvm(matrix_mdev, data); + if (ret) + return NOTIFY_DONE; + + /* If there is no CRYCB pointer, then we can't copy the masks */ + if (!matrix_mdev->kvm->arch.crypto.crycbd) + return NOTIFY_DONE; + + vfio_ap_mdev_copy_masks(matrix_mdev); + + return NOTIFY_OK; +} + +static int vfio_ap_mdev_open(struct mdev_device *mdev) +{ + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + unsigned long events; + int ret; + + + if (!try_module_get(THIS_MODULE)) + return -ENODEV; + + matrix_mdev->group_notifier.notifier_call = vfio_ap_mdev_group_notifier; + events = VFIO_GROUP_NOTIFY_SET_KVM; + + ret = vfio_register_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY, + &events, &matrix_mdev->group_notifier); + if (ret) { + module_put(THIS_MODULE); + return ret; + } + + return 0; +} + +static void vfio_ap_mdev_release(struct mdev_device *mdev) +{ + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + + if (matrix_mdev->kvm) + kvm_arch_crypto_clear_masks(matrix_mdev->kvm); + + vfio_unregister_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY, + &matrix_mdev->group_notifier); + matrix_mdev->kvm = NULL; + module_put(THIS_MODULE); +} + static const struct mdev_parent_ops vfio_ap_matrix_ops = { .owner = THIS_MODULE, .supported_type_groups = vfio_ap_mdev_type_groups, .mdev_attr_groups = vfio_ap_mdev_attr_groups, .create = vfio_ap_mdev_create, .remove = vfio_ap_mdev_remove, + .open = vfio_ap_mdev_open, + .release = vfio_ap_mdev_release, }; int vfio_ap_mdev_register(void) diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h index 9f197ffab7ad..5675492233c7 100644 --- a/drivers/s390/crypto/vfio_ap_private.h +++ b/drivers/s390/crypto/vfio_ap_private.h @@ -71,10 +71,15 @@ struct ap_matrix { * @list: allows the ap_matrix_mdev struct to be added to a list * @matrix: the adapters, usage domains and control domains assigned to the * mediated matrix device. + * @group_notifier: notifier block used for specifying callback function for + * handling the VFIO_GROUP_NOTIFY_SET_KVM event + * @kvm: the struct holding guest's state */ struct ap_matrix_mdev { struct list_head node; struct ap_matrix matrix; + struct notifier_block group_notifier; + struct kvm *kvm; }; extern int vfio_ap_mdev_register(void); From patchwork Tue Sep 25 23:16:27 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614931 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 BD60E913 for ; Tue, 25 Sep 2018 23:17:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AF0D82A9A2 for ; Tue, 25 Sep 2018 23:17:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A1CE42AE17; Tue, 25 Sep 2018 23:17:52 +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 3C9402A9A2 for ; 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 25 Sep 2018 17:17:43 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNHekh15138900 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:17:40 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 33EBE136053; Tue, 25 Sep 2018 17:17:40 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 362C4136055; Tue, 25 Sep 2018 17:17:37 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:17:37 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 12/26] s390: vfio-ap: implement VFIO_DEVICE_GET_INFO ioctl Date: Tue, 25 Sep 2018 19:16:27 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0016-0000-0000-00000934C207 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:17:45 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0017-0000-0000-0000407B9601 Message-Id: <20180925231641.4954-13-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak Adds support for the VFIO_DEVICE_GET_INFO ioctl to the VFIO AP Matrix device driver. This is a minimal implementation, as vfio-ap does not use I/O regions. Signed-off-by: Tony Krowiak Reviewed-by: Pierre Morel Reviewed-by: Cornelia Huck Acked-by: Halil Pasic Tested-by: Michael Mueller Tested-by: Farhan Ali Tested-by: Pierre Morel --- drivers/s390/crypto/vfio_ap_ops.c | 38 +++++++++++++++++++++++++++++++ include/uapi/linux/vfio.h | 1 + 2 files changed, 39 insertions(+) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 89fbcde8dc98..b4f67d547493 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -852,6 +852,43 @@ static void vfio_ap_mdev_release(struct mdev_device *mdev) module_put(THIS_MODULE); } +static int vfio_ap_mdev_get_device_info(unsigned long arg) +{ + unsigned long minsz; + struct vfio_device_info info; + + minsz = offsetofend(struct vfio_device_info, num_irqs); + + if (copy_from_user(&info, (void __user *)arg, minsz)) + return -EFAULT; + + if (info.argsz < minsz) + return -EINVAL; + + info.flags = VFIO_DEVICE_FLAGS_AP; + info.num_regions = 0; + info.num_irqs = 0; + + return copy_to_user((void __user *)arg, &info, minsz); +} + +static ssize_t vfio_ap_mdev_ioctl(struct mdev_device *mdev, + unsigned int cmd, unsigned long arg) +{ + int ret; + + switch (cmd) { + case VFIO_DEVICE_GET_INFO: + ret = vfio_ap_mdev_get_device_info(arg); + break; + default: + ret = -EOPNOTSUPP; + break; + } + + return ret; +} + static const struct mdev_parent_ops vfio_ap_matrix_ops = { .owner = THIS_MODULE, .supported_type_groups = vfio_ap_mdev_type_groups, @@ -860,6 +897,7 @@ static const struct mdev_parent_ops vfio_ap_matrix_ops = { .remove = vfio_ap_mdev_remove, .open = vfio_ap_mdev_open, .release = vfio_ap_mdev_release, + .ioctl = vfio_ap_mdev_ioctl, }; int vfio_ap_mdev_register(void) diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index bfbe2be8f369..f378b9802d8b 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -200,6 +200,7 @@ struct vfio_device_info { #define VFIO_DEVICE_FLAGS_PLATFORM (1 << 2) /* vfio-platform device */ #define VFIO_DEVICE_FLAGS_AMBA (1 << 3) /* vfio-amba device */ #define VFIO_DEVICE_FLAGS_CCW (1 << 4) /* vfio-ccw device */ +#define VFIO_DEVICE_FLAGS_AP (1 << 5) /* vfio-ap device */ __u32 num_regions; /* Max region index + 1 */ __u32 num_irqs; /* Max IRQ index + 1 */ }; From patchwork Tue Sep 25 23:16:28 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614933 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 63D98913 for ; Tue, 25 Sep 2018 23:17:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 53BAB2A9A2 for ; Tue, 25 Sep 2018 23:17:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 47EAF2AE17; Tue, 25 Sep 2018 23:17:55 +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 DD71B2A9A2 for ; Tue, 25 Sep 2018 23:17:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727298AbeIZF1q (ORCPT ); Wed, 26 Sep 2018 01:27:46 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:59448 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727294AbeIZF1p (ORCPT ); Wed, 26 Sep 2018 01:27:45 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNEUug073121 for ; Tue, 25 Sep 2018 19:17:52 -0400 Received: from e35.co.us.ibm.com (e35.co.us.ibm.com [32.97.110.153]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mqukppp60-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:17:52 -0400 Received: from localhost by e35.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) Tue, 25 Sep 2018 17:17:47 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNHisV37552336 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:17:44 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6D85A136066; Tue, 25 Sep 2018 17:17:44 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6CB11136065; Tue, 25 Sep 2018 17:17:41 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:17:41 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 13/26] s390: vfio-ap: zeroize the AP queues Date: Tue, 25 Sep 2018 19:16:28 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0012-0000-0000-000016BBBFA7 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:17:49 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0013-0000-0000-0000548899A6 Message-Id: <20180925231641.4954-14-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak Let's call PAPQ(ZAPQ) to zeroize a queue for each queue configured for a mediated matrix device when it is released. Zeroizing a queue resets the queue, clears all pending messages for the queue entries and disables adapter interruptions associated with the queue. Signed-off-by: Tony Krowiak Reviewed-by: Halil Pasic Tested-by: Michael Mueller Tested-by: Farhan Ali Reviewed-by: Cornelia Huck --- drivers/s390/crypto/vfio_ap_ops.c | 44 +++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index b4f67d547493..1943e47d7d78 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -816,6 +816,49 @@ static int vfio_ap_mdev_group_notifier(struct notifier_block *nb, return NOTIFY_OK; } +static int vfio_ap_mdev_reset_queue(unsigned int apid, unsigned int apqi, + unsigned int retry) +{ + struct ap_queue_status status; + + do { + status = ap_zapq(AP_MKQID(apid, apqi)); + switch (status.response_code) { + case AP_RESPONSE_NORMAL: + return 0; + case AP_RESPONSE_RESET_IN_PROGRESS: + case AP_RESPONSE_BUSY: + msleep(20); + break; + default: + /* things are really broken, give up */ + return -EIO; + } + } while (retry--); + + return -EBUSY; +} + +static int vfio_ap_mdev_reset_queues(struct mdev_device *mdev) +{ + int ret; + int rc = 0; + unsigned long apid, apqi; + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + + for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, + matrix_mdev->matrix.apm_max + 1) { + for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm, + matrix_mdev->matrix.aqm_max + 1) { + ret = vfio_ap_mdev_reset_queue(apid, apqi, 1); + if (ret) + rc = ret; + } + } + + return rc; +} + static int vfio_ap_mdev_open(struct mdev_device *mdev) { struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); @@ -846,6 +889,7 @@ static void vfio_ap_mdev_release(struct mdev_device *mdev) if (matrix_mdev->kvm) kvm_arch_crypto_clear_masks(matrix_mdev->kvm); + vfio_ap_mdev_reset_queues(mdev); vfio_unregister_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY, &matrix_mdev->group_notifier); matrix_mdev->kvm = NULL; From patchwork Tue Sep 25 23:16:29 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614935 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 A9AAD16B1 for ; Tue, 25 Sep 2018 23:18:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9B0DD2A9A2 for ; Tue, 25 Sep 2018 23:18:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8F2D02AE17; Tue, 25 Sep 2018 23:18:00 +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 361052A9A2 for ; Tue, 25 Sep 2018 23:18:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727330AbeIZF1v (ORCPT ); Wed, 26 Sep 2018 01:27:51 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:49292 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727232AbeIZF1v (ORCPT ); Wed, 26 Sep 2018 01:27:51 -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 w8PNEU8m108504 for ; Tue, 25 Sep 2018 19:17:57 -0400 Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mqwqd9khx-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:17:57 -0400 Received: from localhost by e33.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 25 Sep 2018 17:17:56 -0600 Received: from b03cxnp08028.gho.boulder.ibm.com (9.17.130.20) by e33.co.us.ibm.com (192.168.1.133) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 25 Sep 2018 17:17:51 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNHmjh20709554 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:17:48 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A7749136059; Tue, 25 Sep 2018 17:17:48 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A7080136053; Tue, 25 Sep 2018 17:17:45 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:17:45 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 14/26] s390: vfio-ap: implement VFIO_DEVICE_RESET ioctl Date: Tue, 25 Sep 2018 19:16:29 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0036-0000-0000-00000A3EBF15 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:17:54 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0037-0000-0000-000049117F1A Message-Id: <20180925231641.4954-15-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=979 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak Implements the VFIO_DEVICE_RESET ioctl. This ioctl zeroizes all of the AP queues assigned to the guest. Signed-off-by: Tony Krowiak Reviewed-by: Halil Pasic Reviewed-by: Pierre Morel Reviewed-by: Cornelia Huck Tested-by: Michael Mueller Tested-by: Farhan Ali Tested-by: Pierre Morel --- drivers/s390/crypto/vfio_ap_ops.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 1943e47d7d78..5975d7b999e9 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -909,7 +909,7 @@ static int vfio_ap_mdev_get_device_info(unsigned long arg) if (info.argsz < minsz) return -EINVAL; - info.flags = VFIO_DEVICE_FLAGS_AP; + info.flags = VFIO_DEVICE_FLAGS_AP | VFIO_DEVICE_FLAGS_RESET; info.num_regions = 0; info.num_irqs = 0; @@ -925,6 +925,9 @@ static ssize_t vfio_ap_mdev_ioctl(struct mdev_device *mdev, case VFIO_DEVICE_GET_INFO: ret = vfio_ap_mdev_get_device_info(arg); break; + case VFIO_DEVICE_RESET: + ret = vfio_ap_mdev_reset_queues(mdev); + break; default: ret = -EOPNOTSUPP; break; From patchwork Tue Sep 25 23:16:30 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614959 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 17AB5913 for ; Tue, 25 Sep 2018 23:19:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0989F2AB65 for ; Tue, 25 Sep 2018 23:19:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F1F672AB75; Tue, 25 Sep 2018 23:19:27 +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 A13BF2AB65 for ; Tue, 25 Sep 2018 23:19:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727356AbeIZF1z (ORCPT ); Wed, 26 Sep 2018 01:27:55 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:55354 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727262AbeIZF1y (ORCPT ); Wed, 26 Sep 2018 01:27:54 -0400 Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNEWF7022460 for ; Tue, 25 Sep 2018 19:18:00 -0400 Received: from e35.co.us.ibm.com (e35.co.us.ibm.com [32.97.110.153]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mqtmp9eug-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:17:59 -0400 Received: from localhost by e35.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) Tue, 25 Sep 2018 17:17:56 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNHrMV41091236 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:17:53 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 04965136051; Tue, 25 Sep 2018 17:17:53 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E218A136053; Tue, 25 Sep 2018 17:17:49 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:17:49 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Pierre Morel , Tony Krowiak Subject: [PATCH v11 15/26] KVM: s390: Clear Crypto Control Block when using vSIE Date: Tue, 25 Sep 2018 19:16:30 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0012-0000-0000-000016BBBFAB X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:17:58 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0013-0000-0000-0000548899BE Message-Id: <20180925231641.4954-16-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=708 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pierre Morel When we clear the Crypto Control Block (CRYCB) used by a guest level 2, the vSIE shadow CRYCB for guest level 3 must be updated before the guest uses it. We achieve this by using the KVM_REQ_VSIE_RESTART synchronous request for each vCPU belonging to the guest to force the reload of the shadow CRYCB before rerunning the guest level 3. Signed-off-by: Pierre Morel Signed-off-by: Tony Krowiak --- arch/s390/kvm/kvm-s390.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 75aa5aa4a926..c94ef2d0dbe4 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -2043,6 +2043,8 @@ void kvm_arch_crypto_clear_masks(struct kvm *kvm) memset(&kvm->arch.crypto.crycb->apcb1, 0, sizeof(kvm->arch.crypto.crycb->apcb1)); + /* recreate the shadow crycb for each vcpu */ + kvm_s390_sync_request_broadcast(kvm, KVM_REQ_VSIE_RESTART); kvm_s390_vcpu_unblock_all(kvm); mutex_unlock(&kvm->lock); } From patchwork Tue Sep 25 23:16:31 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614957 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 CF8B416B1 for ; Tue, 25 Sep 2018 23:19:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C05F52AB65 for ; Tue, 25 Sep 2018 23:19:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B3D492AB75; Tue, 25 Sep 2018 23:19:26 +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 5812E2AB6E for ; Tue, 25 Sep 2018 23:19:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727421AbeIZF3T (ORCPT ); Wed, 26 Sep 2018 01:29:19 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:36042 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727352AbeIZF2A (ORCPT ); Wed, 26 Sep 2018 01:28:00 -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 w8PNEU1f040670 for ; Tue, 25 Sep 2018 19:18:06 -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 2mqwvv1ar4-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:18:05 -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) Tue, 25 Sep 2018 17:18:00 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNHvEc32243846 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:17:57 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5D290136053; Tue, 25 Sep 2018 17:17:57 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3E25C13605D; Tue, 25 Sep 2018 17:17:54 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:17:54 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Pierre Morel , Tony Krowiak Subject: [PATCH v11 16/26] KVM: s390: vsie: Do the CRYCB validation first Date: Tue, 25 Sep 2018 19:16:31 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-8235-0000-0000-00000E06BFCC X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873679; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:18:03 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-8236-0000-0000-000042C5970E Message-Id: <20180925231641.4954-17-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pierre Morel We need to handle the validity checks for the crycb, no matter what the settings for the keywrappings are. So lets move the keywrapping checks after we have done the validy checks. Signed-off-by: Pierre Morel Signed-off-by: Tony Krowiak Reviewed-by: Janosch Frank Reviewed-by: David Hildenbrand --- 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 12b970701c26..38ea5da4e642 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -161,17 +161,18 @@ 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); else 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)) From patchwork Tue Sep 25 23:16:32 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614937 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 34FB816B1 for ; Tue, 25 Sep 2018 23:18:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 236E32A0E3 for ; Tue, 25 Sep 2018 23:18:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 150B62A14C; Tue, 25 Sep 2018 23:18:13 +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 A9F002A0E3 for ; Tue, 25 Sep 2018 23:18:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727399AbeIZF2E (ORCPT ); Wed, 26 Sep 2018 01:28:04 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:60574 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727265AbeIZF2E (ORCPT ); Wed, 26 Sep 2018 01:28:04 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNETKx073110 for ; Tue, 25 Sep 2018 19:18:10 -0400 Received: from e31.co.us.ibm.com (e31.co.us.ibm.com [32.97.110.149]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mqukpppg9-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:18:09 -0400 Received: from localhost by e31.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 25 Sep 2018 17:18:09 -0600 Received: from b03cxnp08026.gho.boulder.ibm.com (9.17.130.18) by e31.co.us.ibm.com (192.168.1.131) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 25 Sep 2018 17:18:04 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNI1MT18219198 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:18:01 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B9CB313604F; Tue, 25 Sep 2018 17:18:01 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 97144136051; Tue, 25 Sep 2018 17:17:58 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:17:58 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Pierre Morel , Tony Krowiak Subject: [PATCH v11 17/26] KVM: s390: vsie: Make use of CRYCB FORMAT2 clear Date: Tue, 25 Sep 2018 19:16:32 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-8235-0000-0000-00000E06BFD0 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093643; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:18:07 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-8236-0000-0000-000042C59715 Message-Id: <20180925231641.4954-18-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=800 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pierre Morel The comment preceding the shadow_crycb function is misleading, we effectively accept FORMAT2 CRYCB in the guest. When using FORMAT2 in the host we do not need to or with FORMAT1. Signed-off-by: Pierre Morel Signed-off-by: Tony Krowiak Reviewed-by: Janosch Frank Reviewed-by: David Hildenbrand --- arch/s390/kvm/vsie.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index 38ea5da4e642..e0e6fbfa88f4 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -140,7 +140,8 @@ static int prepare_cpuflags(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) * Create a shadow copy of the crycb block and setup key wrapping, if * requested for guest 3 and enabled for guest 2. * - * We only accept format-1 (no AP in g2), but convert it into format-2 + * We accept format-1 or format-2, but we treat it as a format-1 (no AP in g2), + * and we convert it into format-2 in the shadow CRYCB. * There is nothing to do for format-0. * * Returns: - 0 if shadowed or nothing to do @@ -179,8 +180,7 @@ static int shadow_crycb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) return set_validity_icpt(scb_s, 0x0035U); scb_s->ecb3 |= ecb3_flags; - scb_s->crycbd = ((__u32)(__u64) &vsie_page->crycb) | CRYCB_FORMAT1 | - CRYCB_FORMAT2; + scb_s->crycbd = ((__u32)(__u64) &vsie_page->crycb) | CRYCB_FORMAT2; /* xor both blocks in one run */ b1 = (unsigned long *) vsie_page->crycb.dea_wrapping_key_mask; From patchwork Tue Sep 25 23:16:33 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614955 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 0ADA7913 for ; Tue, 25 Sep 2018 23:19:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EF4932AB65 for ; Tue, 25 Sep 2018 23:19:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E2EAF2AB75; Tue, 25 Sep 2018 23:19:20 +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 4CA362AB65 for ; Tue, 25 Sep 2018 23:19:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727334AbeIZF3M (ORCPT ); Wed, 26 Sep 2018 01:29:12 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:36646 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727421AbeIZF2I (ORCPT ); Wed, 26 Sep 2018 01:28:08 -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 w8PNEUww040706 for ; Tue, 25 Sep 2018 19:18:14 -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 2mqwvv1awa-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:18:14 -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) Tue, 25 Sep 2018 17:18:09 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp07028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNI6n356099018 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:18:06 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 25EB5136055; Tue, 25 Sep 2018 17:18:06 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 023AC136051; Tue, 25 Sep 2018 17:18:03 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:18:02 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Pierre Morel , Tony Krowiak Subject: [PATCH v11 18/26] KVM: s390: vsie: Allow CRYCB FORMAT-2 Date: Tue, 25 Sep 2018 19:16:33 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-8235-0000-0000-00000E06BFD2 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093643; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:18:12 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-8236-0000-0000-000042C5971F Message-Id: <20180925231641.4954-19-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pierre Morel When the guest and the host both use CRYCB FORMAT-2, we copy the guest's FORMAT-1 APCB to a FORMAT-1 shadow APCB. This patch also cleans up the shadow_crycb() function. Signed-off-by: Pierre Morel Signed-off-by: Tony Krowiak --- arch/s390/kvm/vsie.c | 114 +++++++++++++++++++++++++++++++++++++++---- 1 file changed, 104 insertions(+), 10 deletions(-) diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index e0e6fbfa88f4..3a932781e0b0 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -136,14 +136,81 @@ static int prepare_cpuflags(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) return 0; } -/* +/** + * setup_apcb11 - Copy the FORMAT1 APCB from the guest to the shadow CRYCB + * @vcpu: pointer to the virtual CPU + * @apcb_s: pointer to start of apcb in the shadow crycb + * @apcb_o: pointer to start of original guest apcb + * @apcb_h: pointer to start of apcb in the host + * + * Returns 0 and -EFAULT on error reading guest apcb + */ +static int setup_apcb11(struct kvm_vcpu *vcpu, unsigned long *apcb_s, + unsigned long apcb_o, + unsigned long *apcb_h) +{ + if (read_guest_real(vcpu, apcb_o, apcb_s, + sizeof(struct kvm_s390_apcb1))) + return -EFAULT; + + bitmap_and(apcb_s, apcb_s, apcb_h, sizeof(struct kvm_s390_apcb1)); + + return 0; +} + +/** + * setup_apcb - Create a shadow copy of the apcb. + * @vcpu: pointer to the virtual CPU + * @crycb_s: pointer to shadow crycb + * @crycb_o: pointer to original guest crycb + * @crycb_h: pointer to the host crycb + * @fmt_o: format of the original guest crycb. + * @fmt_h: format of the host crycb. + * + * Checks the compatibility between the guest and host crycb and calls the + * appropriate copy function. + * + * Return 0 or an error number if the guest and host crycb are incompatible. + */ +static int setup_apcb(struct kvm_vcpu *vcpu, struct kvm_s390_crypto_cb *crycb_s, + const u32 crycb_o, + struct kvm_s390_crypto_cb *crycb_h, + int fmt_o, int fmt_h) +{ + struct kvm_s390_crypto_cb *crycb; + + crycb = (struct kvm_s390_crypto_cb *) (unsigned long)crycb_o; + + switch (fmt_o) { + case CRYCB_FORMAT2: + if ((crycb_o & PAGE_MASK) != ((crycb_o + 256) & PAGE_MASK)) + return -EACCES; + if (fmt_h != CRYCB_FORMAT2) + return -EINVAL; + return setup_apcb11(vcpu, (unsigned long *)&crycb_s->apcb1, + (unsigned long) &crycb->apcb1, + (unsigned long *)&crycb_h->apcb1); + } + return -EINVAL; +} + +/** + * shadow_crycb - Create a shadow copy of the crycb block + * @vcpu: a pointer to the virtual CPU + * @vsie_page: a pointer to internal date used for the vSIE + * * Create a shadow copy of the crycb block and setup key wrapping, if * requested for guest 3 and enabled for guest 2. * - * We accept format-1 or format-2, but we treat it as a format-1 (no AP in g2), - * and we convert it into format-2 in the shadow CRYCB. + * We accept format-1 or format-2, but we convert format-1 into format-2 + * in the shadow CRYCB. + * Using format-2 enables the firmware to choose the right format when + * scheduling the SIE. * There is nothing to do for format-0. * + * This function centralize the issuing of set_validity_icpt() for all + * the subfunctions working on the crycb. + * * Returns: - 0 if shadowed or nothing to do * - > 0 if control has to be given to guest 2 */ @@ -155,24 +222,42 @@ static int shadow_crycb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) const u32 crycb_addr = crycbd_o & 0x7ffffff8U; unsigned long *b1, *b2; u8 ecb3_flags; + int apie_h; + int key_msk = test_kvm_facility(vcpu->kvm, 76); + int fmt_o = crycbd_o & CRYCB_FORMAT_MASK; + int fmt_h = vcpu->arch.sie_block->crycbd & CRYCB_FORMAT_MASK; + int ret = 0; scb_s->crycbd = 0; if (!(crycbd_o & vcpu->arch.sie_block->crycbd & CRYCB_FORMAT1)) return 0; - /* format-1 is supported with message-security-assist extension 3 */ - if (!test_kvm_facility(vcpu->kvm, 76)) + + apie_h = vcpu->arch.sie_block->eca & ECA_APIE; + if (!apie_h && !key_msk) return 0; - if ((crycb_addr & PAGE_MASK) != ((crycb_addr + 128) & PAGE_MASK)) - return set_validity_icpt(scb_s, 0x003CU); - else if (!crycb_addr) + if (!crycb_addr) return set_validity_icpt(scb_s, 0x0039U); + if (fmt_o == CRYCB_FORMAT1) + if ((crycb_addr & PAGE_MASK) != + ((crycb_addr + 128) & PAGE_MASK)) + return set_validity_icpt(scb_s, 0x003CU); + + if (apie_h && (scb_o->eca & ECA_APIE)) { + ret = setup_apcb(vcpu, &vsie_page->crycb, crycb_addr, + vcpu->kvm->arch.crypto.crycb, + fmt_o, fmt_h); + if (ret) + goto end; + scb_s->eca |= scb_o->eca & ECA_APIE; + } + /* 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; + goto end; /* copy only the wrapping keys */ if (read_guest_real(vcpu, crycb_addr + 72, @@ -180,7 +265,6 @@ static int shadow_crycb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) return set_validity_icpt(scb_s, 0x0035U); scb_s->ecb3 |= ecb3_flags; - scb_s->crycbd = ((__u32)(__u64) &vsie_page->crycb) | CRYCB_FORMAT2; /* xor both blocks in one run */ b1 = (unsigned long *) vsie_page->crycb.dea_wrapping_key_mask; @@ -188,6 +272,16 @@ static int shadow_crycb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) vcpu->kvm->arch.crypto.crycb->dea_wrapping_key_mask; /* as 56%8 == 0, bitmap_xor won't overwrite any data */ bitmap_xor(b1, b1, b2, BITS_PER_BYTE * 56); +end: + switch (ret) { + case -EINVAL: + return set_validity_icpt(scb_s, 0x0020U); + case -EFAULT: + return set_validity_icpt(scb_s, 0x0035U); + case -EACCES: + return set_validity_icpt(scb_s, 0x003CU); + } + scb_s->crycbd = ((__u32)(__u64) &vsie_page->crycb) | CRYCB_FORMAT2; return 0; } From patchwork Tue Sep 25 23:16:34 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614939 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 3B03B913 for ; Tue, 25 Sep 2018 23:18:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2B4502A333 for ; Tue, 25 Sep 2018 23:18:23 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1BF7C2A34A; Tue, 25 Sep 2018 23:18:23 +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 B73FE2A333 for ; 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 25 Sep 2018 17:18:13 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08027.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNIAvr43057174 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:18:10 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7A932136051; Tue, 25 Sep 2018 17:18:10 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5F76713604F; Tue, 25 Sep 2018 17:18:07 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:18:07 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Pierre Morel , Tony Krowiak Subject: [PATCH v11 19/26] KVM: s390: vsie: allow CRYCB FORMAT-1 Date: Tue, 25 Sep 2018 19:16:34 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0004-0000-0000-00001491C01B X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:18:16 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0005-0000-0000-000088F06667 Message-Id: <20180925231641.4954-20-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=823 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pierre Morel When the host and guest both use a FORMAT-1 CRYCB, we copy the guest's FORMAT-0 APCB to a shadow CRYCB for use by vSIE. Signed-off-by: Pierre Morel Signed-off-by: Tony Krowiak --- arch/s390/kvm/vsie.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index 3a932781e0b0..0a26814c6efe 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -136,6 +136,19 @@ static int prepare_cpuflags(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) return 0; } +/* Copy to APCB FORMAT0 from APCB FORMAT0 */ +static int setup_apcb00(struct kvm_vcpu *vcpu, unsigned long *apcb_s, + unsigned long apcb_o, unsigned long *apcb_h) +{ + if (read_guest_real(vcpu, apcb_o, apcb_s, + sizeof(struct kvm_s390_apcb0))) + return -EFAULT; + + bitmap_and(apcb_s, apcb_s, apcb_h, sizeof(struct kvm_s390_apcb0)); + + return 0; +} + /** * setup_apcb11 - Copy the FORMAT1 APCB from the guest to the shadow CRYCB * @vcpu: pointer to the virtual CPU @@ -190,6 +203,12 @@ static int setup_apcb(struct kvm_vcpu *vcpu, struct kvm_s390_crypto_cb *crycb_s, return setup_apcb11(vcpu, (unsigned long *)&crycb_s->apcb1, (unsigned long) &crycb->apcb1, (unsigned long *)&crycb_h->apcb1); + case CRYCB_FORMAT1: + if (fmt_h != CRYCB_FORMAT1) + return -EINVAL; + return setup_apcb00(vcpu, (unsigned long *) &crycb_s->apcb0, + (unsigned long) &crycb->apcb0, + (unsigned long *) &crycb_h->apcb0); } return -EINVAL; } From patchwork Tue Sep 25 23:16:35 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614953 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 36CDE16B1 for ; Tue, 25 Sep 2018 23:19:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 290822AB65 for ; Tue, 25 Sep 2018 23:19:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1C6002AB75; Tue, 25 Sep 2018 23:19:15 +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 B406B2AB65 for ; Tue, 25 Sep 2018 23:19:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727477AbeIZF2S (ORCPT ); Wed, 26 Sep 2018 01:28:18 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:56856 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727447AbeIZF2S (ORCPT ); Wed, 26 Sep 2018 01:28:18 -0400 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNEWRG050658 for ; Tue, 25 Sep 2018 19:18:23 -0400 Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) by mx0b-001b2d01.pphosted.com with ESMTP id 2mqtauhxrq-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:18:23 -0400 Received: from localhost by e33.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) Tue, 25 Sep 2018 17:18:19 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNIGj726476566 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:18:16 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4020A13605D; Tue, 25 Sep 2018 17:18:16 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BCC8B136059; Tue, 25 Sep 2018 17:18:11 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:18:11 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Pierre Morel , Tony Krowiak Subject: [PATCH v11 20/26] KVM: s390: vsie: allow CRYCB FORMAT-0 Date: Tue, 25 Sep 2018 19:16:35 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0036-0000-0000-00000A3EBF1F X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093642; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:18:21 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0037-0000-0000-000049117F52 Message-Id: <20180925231641.4954-21-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=907 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pierre Morel When the host and the guest both use a FORMAT-0 CRYCB, we copy the guest's FORMAT-0 APCB to a shadow CRYCB for use by vSIE. Signed-off-by: Pierre Morel Signed-off-by: Tony Krowiak --- arch/s390/kvm/vsie.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index 0a26814c6efe..67a5536637bb 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -136,7 +136,15 @@ static int prepare_cpuflags(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) return 0; } -/* Copy to APCB FORMAT0 from APCB FORMAT0 */ +/** + * setup_apcb00 - Copy to APCB FORMAT0 from APCB FORMAT0 + * @vcpu: pointer to the virtual CPU + * @apcb_s: pointer to start of apcb in the shadow crycb + * @apcb_o: pointer to start of original apcb in the guest2 + * @apcb_h: pointer to start of apcb in the guest1 + * + * Returns 0 and -EFAULT on error reading guest apcb + */ static int setup_apcb00(struct kvm_vcpu *vcpu, unsigned long *apcb_s, unsigned long apcb_o, unsigned long *apcb_h) { @@ -209,6 +217,14 @@ static int setup_apcb(struct kvm_vcpu *vcpu, struct kvm_s390_crypto_cb *crycb_s, return setup_apcb00(vcpu, (unsigned long *) &crycb_s->apcb0, (unsigned long) &crycb->apcb0, (unsigned long *) &crycb_h->apcb0); + case CRYCB_FORMAT0: + if ((crycb_o & PAGE_MASK) != ((crycb_o + 32) & PAGE_MASK)) + return -EACCES; + if (fmt_h != CRYCB_FORMAT0) + return -EINVAL; + return setup_apcb00(vcpu, (unsigned long *) &crycb_s->apcb0, + (unsigned long) &crycb->apcb0, + (unsigned long *) &crycb_h->apcb0); } return -EINVAL; } @@ -248,8 +264,6 @@ static int shadow_crycb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) int ret = 0; scb_s->crycbd = 0; - if (!(crycbd_o & vcpu->arch.sie_block->crycbd & CRYCB_FORMAT1)) - return 0; apie_h = vcpu->arch.sie_block->eca & ECA_APIE; if (!apie_h && !key_msk) From patchwork Tue Sep 25 23:16:36 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614951 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 29E1B16B1 for ; Tue, 25 Sep 2018 23:19:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 19E462AB65 for ; Tue, 25 Sep 2018 23:19:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0D54C2AB75; Tue, 25 Sep 2018 23:19:13 +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 AD2DF2AB65 for ; Tue, 25 Sep 2018 23:19:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727471AbeIZF2W (ORCPT ); Wed, 26 Sep 2018 01:28:22 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:44794 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727490AbeIZF2V (ORCPT ); Wed, 26 Sep 2018 01:28:21 -0400 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNET1d100928 for ; Tue, 25 Sep 2018 19:18:27 -0400 Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mqujyy297-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:18:27 -0400 Received: from localhost by e33.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) Tue, 25 Sep 2018 17:18:23 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08027.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNIK0351708124 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:18:20 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 91155136053; Tue, 25 Sep 2018 17:18:20 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7A3A713605D; Tue, 25 Sep 2018 17:18:17 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:18:17 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Pierre Morel , Tony Krowiak Subject: [PATCH v11 21/26] KVM: s390: vsie: allow guest FORMAT-0 CRYCB on host FORMAT-1 Date: Tue, 25 Sep 2018 19:16:36 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0036-0000-0000-00000A3EBF20 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093643; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:18:25 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0037-0000-0000-000049117F55 Message-Id: <20180925231641.4954-22-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pierre Morel When the guest schedules a SIE with a FORMAT-0 CRYCB, we are able to schedule it in the host with a FORMAT-1 CRYCB if the host uses FORMAT-1 or FORMAT-0. Signed-off-by: Pierre Morel Signed-off-by: Tony Krowiak --- arch/s390/kvm/vsie.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index 67a5536637bb..90ae31072991 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -220,11 +220,17 @@ static int setup_apcb(struct kvm_vcpu *vcpu, struct kvm_s390_crypto_cb *crycb_s, case CRYCB_FORMAT0: if ((crycb_o & PAGE_MASK) != ((crycb_o + 32) & PAGE_MASK)) return -EACCES; - if (fmt_h != CRYCB_FORMAT0) + + switch (fmt_h) { + case CRYCB_FORMAT2: return -EINVAL; - return setup_apcb00(vcpu, (unsigned long *) &crycb_s->apcb0, - (unsigned long) &crycb->apcb0, - (unsigned long *) &crycb_h->apcb0); + case CRYCB_FORMAT1: + case CRYCB_FORMAT0: + return setup_apcb00(vcpu, + (unsigned long *) &crycb_s->apcb0, + (unsigned long) &crycb->apcb0, + (unsigned long *) &crycb_h->apcb0); + } } return -EINVAL; } From patchwork Tue Sep 25 23:16:37 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614941 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 62B7D913 for ; Tue, 25 Sep 2018 23:18:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5339F2AB65 for ; Tue, 25 Sep 2018 23:18:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 476E32AB75; Tue, 25 Sep 2018 23:18:35 +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 D36282AB65 for ; Tue, 25 Sep 2018 23:18:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727518AbeIZF21 (ORCPT ); Wed, 26 Sep 2018 01:28:27 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:45082 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727512AbeIZF20 (ORCPT ); Wed, 26 Sep 2018 01:28:26 -0400 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNEURg101033 for ; Tue, 25 Sep 2018 19:18:32 -0400 Received: from e35.co.us.ibm.com (e35.co.us.ibm.com [32.97.110.153]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mqujyy2bs-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:18:32 -0400 Received: from localhost by e35.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) Tue, 25 Sep 2018 17:18:28 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08027.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNIPtw48431170 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:18:25 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EC07113604F; Tue, 25 Sep 2018 17:18:24 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CB33A136055; Tue, 25 Sep 2018 17:18:21 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:18:21 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Pierre Morel , Tony Krowiak Subject: [PATCH v11 22/26] KVM: s390: vsie: allow guest FORMAT-1 CRYCB on host FORMAT-2 Date: Tue, 25 Sep 2018 19:16:37 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0012-0000-0000-000016BBBFB1 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093643; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:18:30 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0013-0000-0000-0000548899FA Message-Id: <20180925231641.4954-23-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pierre Morel When the guest schedules a SIE with a CRYCB FORMAT-1 CRYCB, we are able to schedule it in the host with a FORMAT-2 CRYCB if the host uses FORMAT-2. Signed-off-by: Pierre Morel Signed-off-by: Tony Krowiak --- arch/s390/kvm/vsie.c | 33 ++++++++++++++++++++++++++++----- 1 file changed, 28 insertions(+), 5 deletions(-) diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index 90ae31072991..ca6466304731 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -135,6 +135,22 @@ static int prepare_cpuflags(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) atomic_set(&scb_s->cpuflags, newflags); return 0; } +/* Copy to APCB FORMAT1 from APCB FORMAT0 */ +static int setup_apcb10(struct kvm_vcpu *vcpu, struct kvm_s390_apcb1 *apcb_s, + unsigned long apcb_o, struct kvm_s390_apcb1 *apcb_h) +{ + struct kvm_s390_apcb0 tmp; + + if (read_guest_real(vcpu, apcb_o, &tmp, sizeof(struct kvm_s390_apcb0))) + return -EFAULT; + + apcb_s->apm[0] = apcb_h->apm[0] & tmp.apm[0]; + apcb_s->aqm[0] = apcb_h->aqm[0] & tmp.aqm[0] & 0xffff000000000000UL; + apcb_s->adm[0] = apcb_h->adm[0] & tmp.adm[0] & 0xffff000000000000UL; + + return 0; + +} /** * setup_apcb00 - Copy to APCB FORMAT0 from APCB FORMAT0 @@ -212,11 +228,18 @@ static int setup_apcb(struct kvm_vcpu *vcpu, struct kvm_s390_crypto_cb *crycb_s, (unsigned long) &crycb->apcb1, (unsigned long *)&crycb_h->apcb1); case CRYCB_FORMAT1: - if (fmt_h != CRYCB_FORMAT1) - return -EINVAL; - return setup_apcb00(vcpu, (unsigned long *) &crycb_s->apcb0, - (unsigned long) &crycb->apcb0, - (unsigned long *) &crycb_h->apcb0); + switch (fmt_h) { + case CRYCB_FORMAT2: + return setup_apcb10(vcpu, &crycb_s->apcb1, + (unsigned long) &crycb->apcb0, + &crycb_h->apcb1); + case CRYCB_FORMAT1: + return setup_apcb00(vcpu, + (unsigned long *) &crycb_s->apcb0, + (unsigned long) &crycb->apcb0, + (unsigned long *) &crycb_h->apcb0); + } + break; case CRYCB_FORMAT0: if ((crycb_o & PAGE_MASK) != ((crycb_o + 32) & PAGE_MASK)) return -EACCES; From patchwork Tue Sep 25 23:16:38 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614943 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 390DC913 for ; Tue, 25 Sep 2018 23:18:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2A7442AB65 for ; Tue, 25 Sep 2018 23:18:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1ED792AB75; Tue, 25 Sep 2018 23:18:44 +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 C35CA2AB65 for ; Tue, 25 Sep 2018 23:18:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727553AbeIZF2d (ORCPT ); Wed, 26 Sep 2018 01:28:33 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:54354 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727536AbeIZF2a (ORCPT ); Wed, 26 Sep 2018 01:28:30 -0400 Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNETAv015962 for ; Tue, 25 Sep 2018 19:18:36 -0400 Received: from e35.co.us.ibm.com (e35.co.us.ibm.com [32.97.110.153]) by mx0b-001b2d01.pphosted.com with ESMTP id 2mqtus8cc7-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:18:36 -0400 Received: from localhost by e35.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) Tue, 25 Sep 2018 17:18:32 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNITDt26149036 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:18:29 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4DB90136053; Tue, 25 Sep 2018 17:18:29 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 31A7213604F; Tue, 25 Sep 2018 17:18:26 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:18:26 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Pierre Morel , Tony Krowiak Subject: [PATCH v11 23/26] KVM: s390: vsie: allow guest FORMAT-0 CRYCB on host FORMAT-2 Date: Tue, 25 Sep 2018 19:16:38 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0012-0000-0000-000016BBBFB2 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093643; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:18:34 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0013-0000-0000-0000548899FE Message-Id: <20180925231641.4954-24-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pierre Morel When the guest schedules a SIE with a FORMAT-0 CRYCB, we are able to schedule it in the host with a FORMAT-2 CRYCB if the host uses FORMAT-2 Signed-off-by: Pierre Morel Signed-off-by: Tony Krowiak --- arch/s390/kvm/vsie.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index ca6466304731..9117891651c6 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -246,7 +246,9 @@ static int setup_apcb(struct kvm_vcpu *vcpu, struct kvm_s390_crypto_cb *crycb_s, switch (fmt_h) { case CRYCB_FORMAT2: - return -EINVAL; + return setup_apcb10(vcpu, &crycb_s->apcb1, + (unsigned long) &crycb->apcb0, + &crycb_h->apcb1); case CRYCB_FORMAT1: case CRYCB_FORMAT0: return setup_apcb00(vcpu, From patchwork Tue Sep 25 23:16:39 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614945 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 0810016B1 for ; Tue, 25 Sep 2018 23:18:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ED5242AB65 for ; Tue, 25 Sep 2018 23:18:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E19D32AB75; Tue, 25 Sep 2018 23:18:44 +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 655082AB65 for ; 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 25 Sep 2018 17:18:36 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp07028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNIXLD63635656 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:18:33 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8DDBB136051; Tue, 25 Sep 2018 17:18:33 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 88DEB13605D; Tue, 25 Sep 2018 17:18:30 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:18:30 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 24/26] KVM: s390: device attrs to enable/disable AP interpretation Date: Tue, 25 Sep 2018 19:16:39 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0012-0000-0000-000016BBBFB4 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093643; UDB=6.00565266; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:18:39 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0013-0000-0000-000054889A06 Message-Id: <20180925231641.4954-25-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak Introduces two new VM crypto device attributes (KVM_S390_VM_CRYPTO) to enable or disable AP instruction interpretation from userspace via the KVM_SET_DEVICE_ATTR ioctl: * The KVM_S390_VM_CRYPTO_ENABLE_APIE attribute enables hardware interpretation of AP instructions executed on the guest. * The KVM_S390_VM_CRYPTO_DISABLE_APIE attribute disables hardware interpretation of AP instructions executed on the guest. In this case the instructions will be intercepted and pass through to the guest. Signed-off-by: Tony Krowiak Reviewed-by: Cornelia Huck --- arch/s390/include/uapi/asm/kvm.h | 2 ++ arch/s390/kvm/kvm-s390.c | 31 ++++++++++++++++++++++++++++--- 2 files changed, 30 insertions(+), 3 deletions(-) diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h index 9a50f02b9894..16511d97e8dc 100644 --- a/arch/s390/include/uapi/asm/kvm.h +++ b/arch/s390/include/uapi/asm/kvm.h @@ -160,6 +160,8 @@ struct kvm_s390_vm_cpu_subfunc { #define KVM_S390_VM_CRYPTO_ENABLE_DEA_KW 1 #define KVM_S390_VM_CRYPTO_DISABLE_AES_KW 2 #define KVM_S390_VM_CRYPTO_DISABLE_DEA_KW 3 +#define KVM_S390_VM_CRYPTO_ENABLE_APIE 4 +#define KVM_S390_VM_CRYPTO_DISABLE_APIE 5 /* kvm attributes for migration mode */ #define KVM_S390_VM_MIGRATION_STOP 0 diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index c94ef2d0dbe4..81fd82f7626d 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -856,12 +856,11 @@ void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm) static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) { - if (!test_kvm_facility(kvm, 76)) - return -EINVAL; - mutex_lock(&kvm->lock); switch (attr->attr) { case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: + if (!test_kvm_facility(kvm, 76)) + return -EINVAL; get_random_bytes( kvm->arch.crypto.crycb->aes_wrapping_key_mask, sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); @@ -869,6 +868,8 @@ static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support"); break; case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: + if (!test_kvm_facility(kvm, 76)) + return -EINVAL; get_random_bytes( kvm->arch.crypto.crycb->dea_wrapping_key_mask, sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); @@ -876,17 +877,35 @@ static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support"); break; case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: + if (!test_kvm_facility(kvm, 76)) + return -EINVAL; kvm->arch.crypto.aes_kw = 0; memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0, sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support"); break; case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: + if (!test_kvm_facility(kvm, 76)) + return -EINVAL; kvm->arch.crypto.dea_kw = 0; memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0, sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support"); break; + case KVM_S390_VM_CRYPTO_ENABLE_APIE: + if (!ap_instructions_available()) { + mutex_unlock(&kvm->lock); + return -EOPNOTSUPP; + } + kvm->arch.crypto.apie = 1; + break; + case KVM_S390_VM_CRYPTO_DISABLE_APIE: + if (!ap_instructions_available()) { + mutex_unlock(&kvm->lock); + return -EOPNOTSUPP; + } + kvm->arch.crypto.apie = 0; + break; default: mutex_unlock(&kvm->lock); return -ENXIO; @@ -1495,6 +1514,10 @@ static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: ret = 0; break; + case KVM_S390_VM_CRYPTO_ENABLE_APIE: + case KVM_S390_VM_CRYPTO_DISABLE_APIE: + ret = ap_instructions_available() ? 0 : -ENXIO; + break; default: ret = -ENXIO; break; @@ -2062,6 +2085,7 @@ static u64 kvm_s390_get_initial_cpuid(void) static void kvm_s390_crypto_init(struct kvm *kvm) { kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb; + kvm->arch.crypto.apie = 0; kvm_s390_set_crycb_format(kvm); if (!test_kvm_facility(kvm, 76)) @@ -2601,6 +2625,7 @@ static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); + vcpu->arch.sie_block->eca &= ~ECA_APIE; if (vcpu->kvm->arch.crypto.apie) vcpu->arch.sie_block->eca |= ECA_APIE; From patchwork Tue Sep 25 23:16:40 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614949 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 720E3913 for ; Tue, 25 Sep 2018 23:19:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 635D82AB65 for ; Tue, 25 Sep 2018 23:19:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 570A42AB75; Tue, 25 Sep 2018 23:19:04 +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 E18C72AB65 for ; Tue, 25 Sep 2018 23:19:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727615AbeIZF2z (ORCPT ); Wed, 26 Sep 2018 01:28:55 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:36786 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727583AbeIZF2k (ORCPT ); Wed, 26 Sep 2018 01:28:40 -0400 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNEVj8066595 for ; Tue, 25 Sep 2018 19:18:46 -0400 Received: from e31.co.us.ibm.com (e31.co.us.ibm.com [32.97.110.149]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mqtj4h8c7-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:18:46 -0400 Received: from localhost by e31.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 25 Sep 2018 17:18:45 -0600 Received: from b03cxnp08026.gho.boulder.ibm.com (9.17.130.18) by e31.co.us.ibm.com (192.168.1.131) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 25 Sep 2018 17:18:41 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNIbhr42598558 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:18:37 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C648A136055; Tue, 25 Sep 2018 17:18:37 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C6E9D13604F; Tue, 25 Sep 2018 17:18:34 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:18:34 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 25/26] KVM: s390: CPU model support for AP virtualization Date: Tue, 25 Sep 2018 19:16:40 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-8235-0000-0000-00000E06BFD7 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093643; UDB=6.00565267; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:18:43 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-8236-0000-0000-000042C59767 Message-Id: <20180925231641.4954-26-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak Introduces two new CPU model facilities to support AP virtualization for KVM guests: 1. AP Query Configuration Information (QCI) facility is installed. This is indicated by setting facilities bit 12 for the guest. The kernel will not enable this facility for the guest if it is not set on the host. If this facility is not set for the KVM guest, then only APQNs with an APQI less than 16 will be used by a Linux guest regardless of the matrix configuration for the virtual machine. This is a limitation of the Linux AP bus. 2. AP Facilities Test facility (APFT) is installed. This is indicated by setting facilities bit 15 for the guest. The kernel will not enable this facility for the guest if it is not set on the host. If this facility is not set for the KVM guest, then no AP devices will be available to the guest regardless of the guest's matrix configuration for the virtual machine. This is a limitation of the Linux AP bus. Signed-off-by: Tony Krowiak Reviewed-by: Christian Borntraeger Reviewed-by: Halil Pasic Reviewed-by: David Hildenbrand Tested-by: Michael Mueller Tested-by: Farhan Ali Acked-by: Cornelia Huck --- arch/s390/kvm/kvm-s390.c | 1 + arch/s390/tools/gen_facilities.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 81fd82f7626d..444965e78010 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -371,6 +371,7 @@ static void kvm_s390_cpu_feat_init(void) if (MACHINE_HAS_ESOP) allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP); + /* * We need SIE support, ESOP (PROT_READ protection for gmap_shadow), * 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing). diff --git a/arch/s390/tools/gen_facilities.c b/arch/s390/tools/gen_facilities.c index 0c85aedcf9b3..fd788e0f2e5b 100644 --- a/arch/s390/tools/gen_facilities.c +++ b/arch/s390/tools/gen_facilities.c @@ -106,6 +106,8 @@ static struct facility_def facility_defs[] = { .name = "FACILITIES_KVM_CPUMODEL", .bits = (int[]){ + 12, /* AP Query Configuration Information */ + 15, /* AP Facilities Test */ 156, /* etoken facility */ -1 /* END */ } From patchwork Tue Sep 25 23:16:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Krowiak X-Patchwork-Id: 10614947 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 36B5E16B1 for ; Tue, 25 Sep 2018 23:18:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 23E292AB65 for ; Tue, 25 Sep 2018 23:18:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 16D212AB75; Tue, 25 Sep 2018 23:18:55 +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 158082AB65 for ; Tue, 25 Sep 2018 23:18:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727589AbeIZF2o (ORCPT ); Wed, 26 Sep 2018 01:28:44 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:58840 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727617AbeIZF2o (ORCPT ); Wed, 26 Sep 2018 01:28:44 -0400 Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8PNEW1B022464 for ; Tue, 25 Sep 2018 19:18:49 -0400 Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mqtmp9frn-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 25 Sep 2018 19:18:49 -0400 Received: from localhost by e33.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) Tue, 25 Sep 2018 17:18:45 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp07028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8PNIgnX55705832 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 25 Sep 2018 16:18:42 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 43955136066; Tue, 25 Sep 2018 17:18:42 -0600 (MDT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0BFB8136051; Tue, 25 Sep 2018 17:18:39 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.192.224]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 25 Sep 2018 17:18:38 -0600 (MDT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.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, akrowiak@linux.vnet.ibm.com, frankja@linux.ibm.com, Tony Krowiak Subject: [PATCH v11 26/26] s390: doc: detailed specifications for AP virtualization Date: Tue, 25 Sep 2018 19:16:41 -0400 X-Mailer: git-send-email 2.19.0.221.g150f307 In-Reply-To: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> References: <20180925231641.4954-1-akrowiak@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18092523-0036-0000-0000-00000A3EBF22 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009771; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000267; SDB=6.01093643; UDB=6.00565267; IPR=6.00873680; MB=3.00023503; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-25 23:18:47 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18092523-0037-0000-0000-000049117F75 Message-Id: <20180925231641.4954-27-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-25_12:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809250227 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tony Krowiak This patch provides documentation describing the AP architecture and design concepts behind the virtualization of AP devices. It also includes an example of how to configure AP devices for exclusive use of KVM guests. Signed-off-by: Tony Krowiak Reviewed-by: Halil Pasic Signed-off-by: Tony Krowiak --- Documentation/s390/vfio-ap.txt | 782 +++++++++++++++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 783 insertions(+) create mode 100644 Documentation/s390/vfio-ap.txt diff --git a/Documentation/s390/vfio-ap.txt b/Documentation/s390/vfio-ap.txt new file mode 100644 index 000000000000..bec67eb7141c --- /dev/null +++ b/Documentation/s390/vfio-ap.txt @@ -0,0 +1,782 @@ +Introduction: +============ +The Adjunct Processor (AP) facility is an IBM Z cryptographic facility comprised +of three AP instructions and from 1 up to 256 PCIe cryptographic adapter cards. +The AP devices provide cryptographic functions to all CPUs assigned to a +linux system running in an IBM Z system LPAR. + +The AP adapter cards are exposed via the AP bus. The motivation for vfio-ap +is to make AP cards available to KVM guests using the VFIO mediated device +framework. This implementation relies considerably on the s390 virtualization +facilities which do most of the hard work of providing direct access to AP +devices. + +AP Architectural Overview: +========================= +To facilitate the comprehension of the design, let's start with some +definitions: + +* AP adapter + + An AP adapter is an IBM Z adapter card that can perform cryptographic + functions. There can be from 0 to 256 adapters assigned to an LPAR. Adapters + assigned to the LPAR in which a linux host is running will be available to + the linux host. Each adapter is identified by a number from 0 to 255; however, + the maximum adapter number is determined by machine model and/or adapter type. + When installed, an AP adapter is accessed by AP instructions executed by any + CPU. + + The AP adapter cards are assigned to a given LPAR via the system's Activation + Profile which can be edited via the HMC. When the linux host system is IPL'd + in the LPAR, the AP bus detects the AP adapter cards assigned to the LPAR and + creates a sysfs device for each assigned adapter. For example, if AP adapters + 4 and 10 (0x0a) are assigned to the LPAR, the AP bus will create the following + sysfs device entries: + + /sys/devices/ap/card04 + /sys/devices/ap/card0a + + Symbolic links to these devices will also be created in the AP bus devices + sub-directory: + + /sys/bus/ap/devices/[card04] + /sys/bus/ap/devices/[card04] + +* AP domain + + An adapter is partitioned into domains. An adapter can hold up to 256 domains + depending upon the adapter type and hardware configuration. A domain is + identified by a number from 0 to 255; however, the maximum domain number is + determined by machine model and/or adapter type.. A domain can be thought of + as a set of hardware registers and memory used for processing AP commands. A + domain can be configured with a secure private key used for clear key + encryption. A domain is classified in one of two ways depending upon how it + may be accessed: + + * Usage domains are domains that are targeted by an AP instruction to + process an AP command. + + * Control domains are domains that are changed by an AP command sent to a + usage domain; for example, to set the secure private key for the control + domain. + + The AP usage and control domains are assigned to a given LPAR via the system's + Activation Profile which can be edited via the HMC. When a linux host system + is IPL'd in the LPAR, the AP bus module detects the AP usage and control + domains assigned to the LPAR. The domain number of each usage domain and + adapter number of each AP adapter are combined to create AP queue devices + (see AP Queue section below). The domain number of each control domain will be + represented in a bitmask and stored in a sysfs file + /sys/bus/ap/ap_control_domain_mask. The bits in the mask, from most to least + significant bit, correspond to domains 0-255. + +* AP Queue + + An AP queue is the means by which an AP command is sent to a usage domain + inside a specific adapter. An AP queue is identified by a tuple + comprised of an AP adapter ID (APID) and an AP queue index (APQI). The + APQI corresponds to a given usage domain number within the adapter. This tuple + forms an AP Queue Number (APQN) uniquely identifying an AP queue. AP + instructions include a field containing the APQN to identify the AP queue to + which the AP command is to be sent for processing. + + The AP bus will create a sysfs device for each APQN that can be derived from + the cross product of the AP adapter and usage domain numbers detected when the + AP bus module is loaded. For example, if adapters 4 and 10 (0x0a) and usage + domains 6 and 71 (0x47) are assigned to the LPAR, the AP bus will create the + following sysfs entries: + + /sys/devices/ap/card04/04.0006 + /sys/devices/ap/card04/04.0047 + /sys/devices/ap/card0a/0a.0006 + /sys/devices/ap/card0a/0a.0047 + + The following symbolic links to these devices will be created in the AP bus + devices subdirectory: + + /sys/bus/ap/devices/[04.0006] + /sys/bus/ap/devices/[04.0047] + /sys/bus/ap/devices/[0a.0006] + /sys/bus/ap/devices/[0a.0047] + +* AP Instructions: + + There are three AP instructions: + + * NQAP: to enqueue an AP command-request message to a queue + * DQAP: to dequeue an AP command-reply message from a queue + * PQAP: to administer the queues + + AP instructions identify the domain that is targeted to process the AP + command; this must be one of the usage domains. An AP command may modify a + domain that is not one of the usage domains, but the modified domain + must be one of the control domains. + +AP and SIE: +========== +Let's now take a look at how AP instructions executed on a guest are interpreted +by the hardware. + +A satellite control block called the Crypto Control Block (CRYCB) is attached to +our main hardware virtualization control block. The CRYCB contains three fields +to identify the adapters, usage domains and control domains assigned to the KVM +guest: + +* The AP Mask (APM) field is a bit mask that identifies the AP adapters assigned + to the KVM guest. Each bit in the mask, from most significant to least + significant bit, corresponds to an APID from 0-255. If a bit is set, the + corresponding adapter is valid for use by the KVM guest. + +* The AP Queue Mask (AQM) field is a bit mask identifying the AP usage domains + assigned to the KVM guest. Each bit in the mask, from most significant to + least significant bit, corresponds to an AP queue index (APQI) from 0-255. If + a bit is set, the corresponding queue is valid for use by the KVM guest. + +* The AP Domain Mask field is a bit mask that identifies the AP control domains + assigned to the KVM guest. The ADM bit mask controls which domains can be + changed by an AP command-request message sent to a usage domain from the + guest. Each bit in the mask, from least significant to most significant bit, + corresponds to a domain from 0-255. If a bit is set, the corresponding domain + can be modified by an AP command-request message sent to a usage domain. + +If you recall from the description of an AP Queue, AP instructions include +an APQN to identify the AP queue to which an AP command-request message is to be +sent (NQAP and PQAP instructions), or from which a command-reply message is to +be received (DQAP instruction). The validity of an APQN is defined by the matrix +calculated from the APM and AQM; it is the cross product of all assigned adapter +numbers (APM) with all assigned queue indexes (AQM). For example, if adapters 1 +and 2 and usage domains 5 and 6 are assigned to a guest, the APQNs (1,5), (1,6), +(2,5) and (2,6) will be valid for the guest. + +The APQNs can provide secure key functionality - i.e., a private key is stored +on the adapter card for each of its domains - so each APQN must be assigned to +at most one guest or to the linux host. + + Example 1: Valid configuration: + ------------------------------ + Guest1: adapters 1,2 domains 5,6 + Guest2: adapter 1,2 domain 7 + + This is valid because both guests have a unique set of APQNs: + Guest1 has APQNs (1,5), (1,6), (2,5), (2,6); + Guest2 has APQNs (1,7), (2,7) + + Example 2: Valid configuration: + ------------------------------ + Guest1: adapters 1,2 domains 5,6 + Guest2: adapters 3,4 domains 5,6 + + This is also valid because both guests have a unique set of APQNs: + Guest1 has APQNs (1,5), (1,6), (2,5), (2,6); + Guest2 has APQNs (3,5), (3,6), (4,5), (4,6) + + Example 3: Invalid configuration: + -------------------------------- + Guest1: adapters 1,2 domains 5,6 + Guest2: adapter 1 domains 6,7 + + This is an invalid configuration because both guests have access to + APQN (1,6). + +The Design: +=========== +The design introduces three new objects: + +1. AP matrix device +2. VFIO AP device driver (vfio_ap.ko) +3. VFIO AP mediated matrix pass-through device + +The VFIO AP device driver +------------------------- +The VFIO AP (vfio_ap) device driver serves the following purposes: + +1. Provides the interfaces to secure APQNs for exclusive use of KVM guests. + +2. Sets up the VFIO mediated device interfaces to manage a mediated matrix + device and creates the sysfs interfaces for assigning adapters, usage + domains, and control domains comprising the matrix for a KVM guest. + +3. Configures the APM, AQM and ADM in the CRYCB referenced by a KVM guest's + SIE state description to grant the guest access to a matrix of AP devices + +Reserve APQNs for exclusive use of KVM guests +--------------------------------------------- +The following block diagram illustrates the mechanism by which APQNs are +reserved: + + +------------------+ + 7 remove | | + +--------------------> cex4queue driver | + | | | + | +------------------+ + | + | + | +------------------+ +-----------------+ + | 5 register driver | | 3 create | | + | +----------------> Device core +----------> matrix device | + | | | | | | + | | +--------^---------+ +-----------------+ + | | | + | | +-------------------+ + | | +-----------------------------------+ | + | | | 4 register AP driver | | 2 register device + | | | | | ++--------+---+-v---+ +--------+-------+-+ +| | | | +| ap_bus +--------------------- > vfio_ap driver | +| | 8 probe | | ++--------^---------+ +--^--^------------+ +6 edit | | | + apmask | +-----------------------------+ | 9 mdev create + aqmask | | 1 modprobe | ++--------+-----+---+ +----------------+-+ +------------------+ +| | | |8 create | mediated | +| admin | | VFIO device core |---------> matrix | +| + | | | device | ++------+-+---------+ +--------^---------+ +--------^---------+ + | | | | + | | 9 create vfio_ap-passthrough | | + | +------------------------------+ | + +-------------------------------------------------------------+ + 10 assign adapter/domain/control domain + +The process for reserving an AP queue for use by a KVM guest is: + +1. The administrator loads the vfio_ap device driver +2. The vfio-ap driver during its initialization will register a single 'matrix' + device with the device core. This will serve as the parent device for + all mediated matrix devices used to configure an AP matrix for a guest. +3. The /sys/devices/vfio_ap/matrix device is created by the device core +4 The vfio_ap device driver will register with the AP bus for AP queue devices + of type 10 and higher (CEX4 and newer). The driver will provide the vfio_ap + driver's probe and remove callback interfaces. Devices older than CEX4 queues + are not supported to simplify the implementation by not needlessly + complicating the design by supporting older devices that will go out of + service in the relatively near future, and for which there are few older + systems around on which to test. +5. The AP bus registers the vfio_ap device driver with the device core +6. The administrator edits the AP adapter and queue masks to reserve AP queues + for use by the vfio_ap device driver. +7. The AP bus removes the AP queues reserved for the vfio_ap driver from the + default zcrypt cex4queue driver. +8. The AP bus probes the vfio_ap device driver to bind the queues reserved for + it. +9. The administrator creates a passthrough type mediated matrix device to be + used by a guest +10 The administrator assigns the adapters, usage domains and control domains + to be exclusively used by a guest. + +Set up the VFIO mediated device interfaces +------------------------------------------ +The VFIO AP device driver utilizes the common interface of the VFIO mediated +device core driver to: +* Register an AP mediated bus driver to add a mediated matrix device to and + remove it from a VFIO group. +* Create and destroy a mediated matrix device +* Add a mediated matrix device to and remove it from the AP mediated bus driver +* Add a mediated matrix device to and remove it from an IOMMU group + +The following high-level block diagram shows the main components and interfaces +of the VFIO AP mediated matrix device driver: + + +-------------+ + | | + | +---------+ | mdev_register_driver() +--------------+ + | | Mdev | +<-----------------------+ | + | | bus | | | vfio_mdev.ko | + | | driver | +----------------------->+ |<-> VFIO user + | +---------+ | probe()/remove() +--------------+ APIs + | | + | MDEV CORE | + | MODULE | + | mdev.ko | + | +---------+ | mdev_register_device() +--------------+ + | |Physical | +<-----------------------+ | + | | device | | | vfio_ap.ko |<-> matrix + | |interface| +----------------------->+ | device + | +---------+ | callback +--------------+ + +-------------+ + +During initialization of the vfio_ap module, the matrix device is registered +with an 'mdev_parent_ops' structure that provides the sysfs attribute +structures, mdev functions and callback interfaces for managing the mediated +matrix device. + +* sysfs attribute structures: + * supported_type_groups + The VFIO mediated device framework supports creation of user-defined + mediated device types. These mediated device types are specified + via the 'supported_type_groups' structure when a device is registered + with the mediated device framework. The registration process creates the + sysfs structures for each mediated device type specified in the + 'mdev_supported_types' sub-directory of the device being registered. Along + with the device type, the sysfs attributes of the mediated device type are + provided. + + The VFIO AP device driver will register one mediated device type for + passthrough devices: + /sys/devices/vfio_ap/matrix/mdev_supported_types/vfio_ap-passthrough + Only the read-only attributes required by the VFIO mdev framework will + be provided: + ... name + ... device_api + ... available_instances + ... device_api + Where: + * name: specifies the name of the mediated device type + * device_api: the mediated device type's API + * available_instances: the number of mediated matrix passthrough devices + that can be created + * device_api: specifies the VFIO API + * mdev_attr_groups + This attribute group identifies the user-defined sysfs attributes of the + mediated device. When a device is registered with the VFIO mediated device + framework, the sysfs attribute files identified in the 'mdev_attr_groups' + structure will be created in the mediated matrix device's directory. The + sysfs attributes for a mediated matrix device are: + * assign_adapter: + * unassign_adapter: + Write-only attributes for assigning/unassigning an AP adapter to/from the + mediated matrix device. To assign/unassign an adapter, the APID of the + adapter is echoed to the respective attribute file. + * assign_domain: + * unassign_domain: + Write-only attributes for assigning/unassigning an AP usage domain to/from + the mediated matrix device. To assign/unassign a domain, the domain + number of the the usage domain is echoed to the respective attribute + file. + * matrix: + A read-only file for displaying the APQNs derived from the cross product + of the adapter and domain numbers assigned to the mediated matrix device. + * assign_control_domain: + * unassign_control_domain: + Write-only attributes for assigning/unassigning an AP control domain + to/from the mediated matrix device. To assign/unassign a control domain, + the ID of the domain to be assigned/unassigned is echoed to the respective + attribute file. + * control_domains: + A read-only file for displaying the control domain numbers assigned to the + mediated matrix device. + +* functions: + * create: + allocates the ap_matrix_mdev structure used by the vfio_ap driver to: + * Store the reference to the KVM structure for the guest using the mdev + * Store the AP matrix configuration for the adapters, domains, and control + domains assigned via the corresponding sysfs attributes files + * remove: + deallocates the mediated matrix device's ap_matrix_mdev structure. This will + be allowed only if a running guest is not using the mdev. + +* callback interfaces + * open: + The vfio_ap driver uses this callback to register a + VFIO_GROUP_NOTIFY_SET_KVM notifier callback function for the mdev matrix + device. The open is invoked when QEMU connects the VFIO iommu group + for the mdev matrix device to the MDEV bus. Access to the KVM structure used + to configure the KVM guest is provided via this callback. The KVM structure, + is used to configure the guest's access to the AP matrix defined via the + mediated matrix device's sysfs attribute files. + * release: + unregisters the VFIO_GROUP_NOTIFY_SET_KVM notifier callback function for the + mdev matrix device and deconfigures the guest's AP matrix. + +Configure the APM, AQM and ADM in the CRYCB: +------------------------------------------- +Configuring the AP matrix for a KVM guest will be performed when the +VFIO_GROUP_NOTIFY_SET_KVM notifier callback is invoked. The notifier +function is called when QEMU connects to KVM. The guest's AP matrix is +configured via it's CRYCB by: +* Setting the bits in the APM corresponding to the APIDs assigned to the + mediated matrix device via its 'assign_adapter' interface. +* Setting the bits in the AQM corresponding to the domains assigned to the + mediated matrix device via its 'assign_domain' interface. +* Setting the bits in the ADM corresponding to the domain dIDs assigned to the + mediated matrix device via its 'assign_control_domains' interface. + +The CPU model features for AP +----------------------------- +The AP stack relies on the presence of the AP instructions as well as two +facilities: The AP Facilities Test (APFT) facility; and the AP Query +Configuration Information (QCI) facility. These features/facilities are made +available to a KVM guest via the following CPU model features: + +1. ap: Indicates whether the AP instructions are installed on the guest. This + feature will be enabled by KVM only if the AP instructions are installed + on the host. + +2. apft: Indicates the APFT facility is available on the guest. This facility + can be made available to the guest only if it is available on the host (i.e., + facility bit 15 is set). + +3. apqci: Indicates the AP QCI facility is available on the guest. This facility + can be made available to the guest only if it is available on the host (i.e., + facility bit 12 is set). + +Note: If the user chooses to specify a CPU model different than the 'host' +model to QEMU, the CPU model features and facilities need to be turned on +explicitly; for example: + + /usr/bin/qemu-system-s390x ... -cpu z13,ap=on,apqci=on,apft=on + +A guest can be precluded from using AP features/facilities by turning them off +explicitly; for example: + + /usr/bin/qemu-system-s390x ... -cpu host,ap=off,apqci=off,apft=off + +Note: If the APFT facility is turned off (apft=off) for the guest, the guest +will not see any AP devices. The zcrypt device drivers that register for type 10 +and newer AP devices - i.e., the cex4card and cex4queue device drivers - need +the APFT facility to ascertain the facilities installed on a given AP device. If +the APFT facility is not installed on the guest, then the probe of device +drivers will fail since only type 10 and newer devices can be configured for +guest use. + +Example: +======= +Let's now provide an example to illustrate how KVM guests may be given +access to AP facilities. For this example, we will show how to configure +three guests such that executing the lszcrypt command on the guests would +look like this: + +Guest1 +------ +CARD.DOMAIN TYPE MODE +------------------------------ +05 CEX5C CCA-Coproc +05.0004 CEX5C CCA-Coproc +05.00ab CEX5C CCA-Coproc +06 CEX5A Accelerator +06.0004 CEX5A Accelerator +06.00ab CEX5C CCA-Coproc + +Guest2 +------ +CARD.DOMAIN TYPE MODE +------------------------------ +05 CEX5A Accelerator +05.0047 CEX5A Accelerator +05.00ff CEX5A Accelerator (5,4), (5,171), (6,4), (6,171), + +Guest2 +------ +CARD.DOMAIN TYPE MODE +------------------------------ +06 CEX5A Accelerator +06.0047 CEX5A Accelerator +06.00ff CEX5A Accelerator + +These are the steps: + +1. Install the vfio_ap module on the linux host. The dependency chain for the + vfio_ap module is: + * iommu + * s390 + * zcrypt + * vfio + * vfio_mdev + * vfio_mdev_device + * KVM + + To build the vfio_ap module, the kernel build must be configured with the + following Kconfig elements selected: + * IOMMU_SUPPORT + * S390 + * ZCRYPT + * S390_AP_IOMMU + * VFIO + * VFIO_MDEV + * VFIO_MDEV_DEVICE + * KVM + + If using make menuconfig select the following to build the vfio_ap module: + -> Device Drivers + -> IOMMU Hardware Support + select S390 AP IOMMU Support + -> VFIO Non-Privileged userspace driver framework + -> Mediated device driver frramework + -> VFIO driver for Mediated devices + -> I/O subsystem + -> VFIO support for AP devices + +2. Secure the AP queues to be used by the three guests so that the host can not + access them. To secure them, there are two sysfs files that specify + bitmasks marking a subset of the APQN range as 'usable by the default AP + queue device drivers' or 'not usable by the default device drivers' and thus + available for use by the vfio_ap device driver'. The sysfs files containing + the sysfs locations of the masks are: + + /sys/bus/ap/apmask + /sys/bus/ap/aqmask + + The 'apmask' is a 256-bit mask that identifies a set of AP adapter IDs + (APID). Each bit in the mask, from most significant to least significant bit, + corresponds to an APID from 0-255. If a bit is set, the APID is marked as + usable only by the default AP queue device drivers; otherwise, the APID is + usable by the vfio_ap device driver. + + The 'aqmask' is a 256-bit mask that identifies a set of AP queue indexes + (APQI). Each bit in the mask, from most significant to least significant bit, + corresponds to an APQI from 0-255. If a bit is set, the APQI is marked as + usable only by the default AP queue device drivers; otherwise, the APQI is + usable by the vfio_ap device driver. + + The APQN of each AP queue device assigned to the linux host is checked by the + AP bus against the set of APQNs derived from the cross product of APIDs + and APQIs marked as usable only by the default AP queue device drivers. If a + match is detected, only the default AP queue device drivers will be probed; + otherwise, the vfio_ap device driver will be probed. + + By default, the two masks are set to reserve all APQNs for use by the default + AP queue device drivers. There are two ways the default masks can be changed: + + 1. The masks can be changed at boot time with the kernel command line + like this: + + ap.apmask=0xffff ap.aqmask=0x40 + + This would give these two pools: + + default drivers pool: adapter 0-15, domain 1 + alternate drivers pool: adapter 16-255, domains 2-255 + + 2. The sysfs mask files can also be edited by echoing a string into the + respective file in one of two formats: + + * An absolute hex string starting with 0x - like "0x12345678" - sets + the mask. If the given string is shorter than the mask, it is padded + with 0s on the right. If the string is longer than the mask, the + operation is terminated with an error (EINVAL). + + * A plus ('+') or minus ('-') followed by a numerical value. Valid + examples are "+1", "-13", "+0x41", "-0xff" and even "+0" and "-0". Only + the corresponding bit in the mask is switched on ('+') or off ('-'). The + values may also be specified in a comma-separated list to switch more + than one bit on or off. + + To secure the AP queues 05.0004, 05.0047, 05.00ab, 05.00ff, 06.0004, 06.0047, + 06.00ab, and 06.00ff for use by the vfio_ap device driver, the corresponding + APQNs must be removed from the masks as follows: + + echo -5,-6 > /sys/bus/ap/apmask + + echo -4,-0x47,-0xab,-0xff > /sys/bus/ap/aqmask + + This will result in AP queues 05.0004, 05.0047, 05.00ab, 05.00ff, 06.0004, + 06.0047, 06.00ab, and 06.00ff getting bound to the vfio_ap device driver. The + sysfs directory for the vfio_ap device driver will now contain symbolic links + to the AP queue devices bound to it: + + /sys/bus/ap + ... [drivers] + ...... [vfio_ap] + ......... [05.0004] + ......... [05.0047] + ......... [05.00ab] + ......... [05.00ff] + ......... [06.0004] + ......... [06.0047] + ......... [06.00ab] + ......... [06.00ff] + + Keep in mind that only type 10 and newer adapters (i.e., CEX4 and later) + can be bound to the vfio_ap device driver. The reason for this is to + simplify the implementation by not needlessly complicating the design by + supporting older devices that will go out of service in the relatively near + future and for which there are few older systems on which to test. + + The administrator, therefore, must take care to secure only AP queues that + can be bound to the vfio_ap device driver. The device type for a given AP + queue device can be read from the parent card's sysfs directory. For example, + to see the hardware type of the queue 05.0004: + + cat /sys/bus/ap/devices/card05/hwtype + + The hwtype must be 10 or higher (CEX4 or newer) in order to be bound to the + vfio_ap device driver. + +3. Create the mediated devices needed to configure the AP matrixes for the + three guests and to provide an interface to the vfio_ap driver for + use by the guests: + + /sys/devices/vfio_ap/matrix/ + --- [mdev_supported_types] + ------ [vfio_ap-passthrough] (passthrough mediated matrix device type) + --------- create + --------- [devices] + + To create the mediated devices for the three guests: + + uuidgen > create + uuidgen > create + uuidgen > create + + or + + echo $uuid1 > create + echo $uuid2 > create + echo $uuid3 > create + + This will create three mediated devices in the [devices] subdirectory named + after the UUID written to the create attribute file. We call them $uuid1, + $uuid2 and $uuid3 and this is the sysfs directory structure after creation: + + /sys/devices/vfio_ap/matrix/ + --- [mdev_supported_types] + ------ [vfio_ap-passthrough] + --------- [devices] + ------------ [$uuid1] + --------------- assign_adapter + --------------- assign_control_domain + --------------- assign_domain + --------------- matrix + --------------- unassign_adapter + --------------- unassign_control_domain + --------------- unassign_domain + + ------------ [$uuid2] + --------------- assign_adapter + --------------- assign_control_domain + --------------- assign_domain + --------------- matrix + --------------- unassign_adapter + ----------------unassign_control_domain + ----------------unassign_domain + + ------------ [$uuid3] + --------------- assign_adapter + --------------- assign_control_domain + --------------- assign_domain + --------------- matrix + --------------- unassign_adapter + ----------------unassign_control_domain + ----------------unassign_domain + +4. The administrator now needs to configure the matrixes for the mediated + devices $uuid1 (for Guest1), $uuid2 (for Guest2) and $uuid3 (for Guest3). + + This is how the matrix is configured for Guest1: + + echo 5 > assign_adapter + echo 6 > assign_adapter + echo 4 > assign_domain + echo 0xab > assign_domain + + Control domains can similarly be assigned using the assign_control_domain + sysfs file. + + If a mistake is made configuring an adapter, domain or control domain, + you can use the unassign_xxx files to unassign the adapter, domain or + control domain. + + To display the matrix configuration for Guest1: + + cat matrix + + This is how the matrix is configured for Guest2: + + echo 5 > assign_adapter + echo 0x47 > assign_domain + echo 0xff > assign_domain + + This is how the matrix is configured for Guest3: + + echo 6 > assign_adapter + echo 0x47 > assign_domain + echo 0xff > assign_domain + + In order to successfully assign an adapter: + + * The adapter number specified must represent a value from 0 up to the + maximum adapter number configured for the system. If an adapter number + higher than the maximum is specified, the operation will terminate with + an error (ENODEV). + + * All APQNs that can be derived from the adapter ID and the IDs of + the previously assigned domains must be bound to the vfio_ap device + driver. If no domains have yet been assigned, then there must be at least + one APQN with the specified APID bound to the vfio_ap driver. If no such + APQNs are bound to the driver, the operation will terminate with an + error (EADDRNOTAVAIL). + + No APQN that can be derived from the adapter ID and the IDs of the + previously assigned domains can be assigned to another mediated matrix + device. If an APQN is assigned to another mediated matrix device, the + operation will terminate with an error (EADDRINUSE). + + In order to successfully assign a domain: + + * The domain number specified must represent a value from 0 up to the + maximum domain number configured for the system. If a domain number + higher than the maximum is specified, the operation will terminate with + an error (ENODEV). + + * All APQNs that can be derived from the domain ID and the IDs of + the previously assigned adapters must be bound to the vfio_ap device + driver. If no domains have yet been assigned, then there must be at least + one APQN with the specified APQI bound to the vfio_ap driver. If no such + APQNs are bound to the driver, the operation will terminate with an + error (EADDRNOTAVAIL). + + No APQN that can be derived from the domain ID and the IDs of the + previously assigned adapters can be assigned to another mediated matrix + device. If an APQN is assigned to another mediated matrix device, the + operation will terminate with an error (EADDRINUSE). + + In order to successfully assign a control domain, the domain number + specified must represent a value from 0 up to the maximum domain number + configured for the system. If a control domain number higher than the maximum + is specified, the operation will terminate with an error (ENODEV). + +5. Start Guest1: + + /usr/bin/qemu-system-s390x ... -cpu host,ap=on,apqci=on,apft=on \ + -device vfio-ap,sysfsdev=/sys/devices/vfio_ap/matrix/$uuid1 ... + +7. Start Guest2: + + /usr/bin/qemu-system-s390x ... -cpu host,ap=on,apqci=on,apft=on \ + -device vfio-ap,sysfsdev=/sys/devices/vfio_ap/matrix/$uuid2 ... + +7. Start Guest3: + + /usr/bin/qemu-system-s390x ... -cpu host,ap=on,apqci=on,apft=on \ + -device vfio-ap,sysfsdev=/sys/devices/vfio_ap/matrix/$uuid3 ... + +When the guest is shut down, the mediated matrix devices may be removed. + +Using our example again, to remove the mediated matrix device $uuid1: + + /sys/devices/vfio_ap/matrix/ + --- [mdev_supported_types] + ------ [vfio_ap-passthrough] + --------- [devices] + ------------ [$uuid1] + --------------- remove + + + echo 1 > remove + + This will remove all of the mdev matrix device's sysfs structures including + the mdev device itself. To recreate and reconfigure the mdev matrix device, + all of the steps starting with step 3 will have to be performed again. Note + that the remove will fail if a guest using the mdev is still running. + + It is not necessary to remove an mdev matrix device, but one may want to + remove it if no guest will use it during the remaining lifetime of the linux + host. If the mdev matrix device is removed, one may want to also reconfigure + the pool of adapters and queues reserved for use by the default drivers. + +Limitations +=========== +* The KVM/kernel interfaces do not provide a way to prevent restoring an APQN + to the default drivers pool of a queue that is still assigned to a mediated + device in use by a guest. It is incumbent upon the administrator to + ensure there is no mediated device in use by a guest to which the APQN is + assigned lest the host be given access to the private data of the AP queue + device such as a private key configured specifically for the guest. + +* Dynamically modifying the AP matrix for a running guest (which would amount to + hot(un)plug of AP devices for the guest) is currently not supported + +* Live guest migration is not supported for guests using AP devices. diff --git a/MAINTAINERS b/MAINTAINERS index 5db5b7e49d08..1610fb26bdac 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12678,6 +12678,7 @@ S: Supported F: drivers/s390/crypto/vfio_ap_drv.c F: drivers/s390/crypto/vfio_ap_private.h F: drivers/s390/crypto/vfio_ap_ops.c +F: Documentation/s390/vfio-ap.txt S390 ZFCP DRIVER M: Steffen Maier