From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A76B7C46470 for ; Wed, 8 Aug 2018 14:47:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5500421718 for ; Wed, 8 Aug 2018 14:47:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5500421718 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.vnet.ibm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729280AbeHHRHG (ORCPT ); Wed, 8 Aug 2018 13:07:06 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:35518 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727710AbeHHREw (ORCPT ); Wed, 8 Aug 2018 13:04:52 -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 w78EiKnQ016391 for ; Wed, 8 Aug 2018 10:44:53 -0400 Received: from e16.ny.us.ibm.com (e16.ny.us.ibm.com [129.33.205.206]) by mx0a-001b2d01.pphosted.com with ESMTP id 2kr1ew3b81-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 08 Aug 2018 10:44:53 -0400 Received: from localhost by e16.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 8 Aug 2018 10:44:49 -0400 Received: from b01ledav001.gho.pok.ibm.com (b01ledav001.gho.pok.ibm.com [9.57.199.106]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w78EilvA52363400 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 8 Aug 2018 14:44:47 GMT Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3E2C028058; Wed, 8 Aug 2018 10:43:36 -0400 (EDT) Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1F75528059; Wed, 8 Aug 2018 10:43:35 -0400 (EDT) Received: from localhost.localdomain (unknown [9.85.187.56]) by b01ledav001.gho.pok.ibm.com (Postfix) with ESMTPS; Wed, 8 Aug 2018 10:43:35 -0400 (EDT) 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 v8 07/22] KVM: s390: refactor crypto initialization Date: Wed, 8 Aug 2018 10:44:17 -0400 X-Mailer: git-send-email 1.7.1 In-Reply-To: <1533739472-7172-1-git-send-email-akrowiak@linux.vnet.ibm.com> References: <1533739472-7172-1-git-send-email-akrowiak@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18080814-0072-0000-0000-0000038D7541 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009507; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01070983; UDB=6.00551366; IPR=6.00850513; MB=3.00022589; MTD=3.00000008; XFM=3.00000015; UTC=2018-08-08 14:44:52 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18080814-0073-0000-0000-0000490268CB Message-Id: <1533739472-7172-8-git-send-email-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-08-08_05:,, 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-1808080153 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Prior to the introduction of AP device virtualization, it was not necessary to provide guest access to the CRYCB unless the MSA extension 3 (MSAX3) facility was installed on the host system. With the introduction of AP device virtualization, the CRYCB must be made accessible to the guest if the AP instructions are installed on the host and are to be provided to the guest. 2. Introduces a flag indicating AP instructions executed on the guest shall be interpreted by the firmware. It is initialized to indicate AP instructions are to be to be interpreted and is used to set the SIE bit for each vcpu during vcpu setup. Signed-off-by: Tony Krowiak Reviewed-by: Halil Pasic Acked-by: Christian Borntraeger Tested-by: Michael Mueller Tested-by: Farhan Ali Signed-off-by: Christian Borntraeger --- arch/s390/include/asm/kvm_host.h | 3 + arch/s390/include/uapi/asm/kvm.h | 1 + arch/s390/kvm/kvm-s390.c | 86 ++++++++++++++++++++------------------ 3 files changed, 49 insertions(+), 41 deletions(-) diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index af39561..0c13f61 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 */ @@ -714,6 +716,7 @@ struct kvm_s390_crypto { __u32 crycbd; __u8 aes_kw; __u8 dea_kw; + __u8 apie; }; #define APCB0_MASK_SIZE 1 diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h index 4cdaa55..a580dec 100644 --- a/arch/s390/include/uapi/asm/kvm.h +++ b/arch/s390/include/uapi/asm/kvm.h @@ -130,6 +130,7 @@ struct kvm_s390_vm_cpu_machine { #define KVM_S390_VM_CPU_FEAT_PFMFI 11 #define KVM_S390_VM_CPU_FEAT_SIGPIF 12 #define KVM_S390_VM_CPU_FEAT_KSS 13 +#define KVM_S390_VM_CPU_FEAT_AP 14 struct kvm_s390_vm_cpu_feat { __u64 feat[16]; }; diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 19f4f44..f96a443 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" @@ -1881,49 +1882,37 @@ 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() == 0) { + 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 @@ -1941,11 +1930,13 @@ 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); + /* Default setting indicating SIE shall interpret AP instructions */ + kvm->arch.crypto.apie = 1; + + if (!test_kvm_facility(kvm, 76)) + return; /* Enable AES/DEA protected key functions by default */ kvm->arch.crypto.aes_kw = 1; @@ -2474,17 +2465,30 @@ 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 neither the AP instructions nor the MSAX3 facility are installed + * on the host, then there is no need for a CRYCB in SIE because the + * they will not be installed on the guest either. + */ + if (ap_instructions_available() && !test_facility(76)) return; - vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); + vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; + + vcpu->arch.sie_block->eca &= ~ECA_APIE; + if (vcpu->kvm->arch.crypto.apie && + test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_AP)) + vcpu->arch.sie_block->eca |= ECA_APIE; - 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; + /* If MSAX3 is installed on the guest, set up protected key support */ + if (test_kvm_facility(vcpu->kvm, 76)) { + vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); - vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; + 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; + } } void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) -- 1.7.1