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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14E29C4332F for ; Tue, 7 Dec 2021 20:59:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238079AbhLGVD0 (ORCPT ); Tue, 7 Dec 2021 16:03:26 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:1074 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S237048AbhLGVDJ (ORCPT ); Tue, 7 Dec 2021 16:03:09 -0500 Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 1B7Jei1Y031728; Tue, 7 Dec 2021 20:59:38 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=KqnYjCwgg5VlQRdEeX/AoA0TiMmXw8n0VYrf/UIT3Xc=; b=pU1mgoR/W9x4wlx1GGwA1XhYFdefUNXl6K4+nUk6f5N622c/vs5BnpYzccJOGFiSMC2I +GSvBMSkDVOAeZnZyI8l1eiCoMhX7KhYQBlAM91+EPCcCHz4rk0SKyVdm9yhF6jLGY3j 9yFT50nho93qCQ+LsTwAPRgMt1FH9GCstogOikCHl1XPsgdyJwXrvQ8JnZ3texD7b+kz oB0U8hKf0BtVoRLsXOsFddaGHCI8m7uFGb+KhQPBVxN+1mp15LkfTUwlCsHziktx8Zje Dr4y0xD3nKnclKfMGtU5Tb++I6CviwkNGmX+J6b4F3S2eTX2M5PG/g5VMtIg/ntvEYHn Tg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com with ESMTP id 3ctcdbuhf6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 07 Dec 2021 20:59:37 +0000 Received: from m0098416.ppops.net (m0098416.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 1B7KnCYq029886; Tue, 7 Dec 2021 20:59:37 GMT Received: from ppma05wdc.us.ibm.com (1b.90.2fa9.ip4.static.sl-reverse.com [169.47.144.27]) by mx0b-001b2d01.pphosted.com with ESMTP id 3ctcdbuhet-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 07 Dec 2021 20:59:37 +0000 Received: from pps.filterd (ppma05wdc.us.ibm.com [127.0.0.1]) by ppma05wdc.us.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 1B7Kvon8031438; Tue, 7 Dec 2021 20:59:36 GMT Received: from b01cxnp22036.gho.pok.ibm.com (b01cxnp22036.gho.pok.ibm.com [9.57.198.26]) by ppma05wdc.us.ibm.com with ESMTP id 3cqyyammwb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 07 Dec 2021 20:59:36 +0000 Received: from b01ledav005.gho.pok.ibm.com (b01ledav005.gho.pok.ibm.com [9.57.199.110]) by b01cxnp22036.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 1B7KxZmx19399188 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 7 Dec 2021 20:59:35 GMT Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 25850AE064; Tue, 7 Dec 2021 20:59:35 +0000 (GMT) Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 35337AE071; Tue, 7 Dec 2021 20:59:30 +0000 (GMT) Received: from li-c92d2ccc-254b-11b2-a85c-a700b5bfb098.ibm.com.com (unknown [9.211.152.43]) by b01ledav005.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 7 Dec 2021 20:59:29 +0000 (GMT) From: Matthew Rosato To: linux-s390@vger.kernel.org Cc: alex.williamson@redhat.com, cohuck@redhat.com, schnelle@linux.ibm.com, farman@linux.ibm.com, pmorel@linux.ibm.com, borntraeger@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, gerald.schaefer@linux.ibm.com, agordeev@linux.ibm.com, frankja@linux.ibm.com, david@redhat.com, imbrenda@linux.ibm.com, vneethv@linux.ibm.com, oberpar@linux.ibm.com, freude@linux.ibm.com, thuth@redhat.com, pasic@linux.ibm.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 19/32] KVM: s390: mechanism to enable guest zPCI Interpretation Date: Tue, 7 Dec 2021 15:57:30 -0500 Message-Id: <20211207205743.150299-20-mjrosato@linux.ibm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20211207205743.150299-1-mjrosato@linux.ibm.com> References: <20211207205743.150299-1-mjrosato@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: YhWRzFrtjtLFQrcynYxssVdHKJlhqEch X-Proofpoint-ORIG-GUID: jWHUr22hVYDLfYXz2VPBOTKBULDyOhYS X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2021-12-07_08,2021-12-06_02,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 impostorscore=0 mlxscore=0 clxscore=1015 mlxlogscore=999 adultscore=0 malwarescore=0 suspectscore=0 spamscore=0 bulkscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2112070126 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The guest must have access to certain facilities in order to allow interpretive execution of zPCI instructions and adapter event notifications. However, there are some cases where a guest might disable interpretation -- provide a mechanism via which we can defer enabling the associated zPCI interpretation facilities until the guest indicates it wishes to use them. Signed-off-by: Matthew Rosato --- arch/s390/include/asm/kvm_host.h | 4 +++ arch/s390/kvm/kvm-s390.c | 43 ++++++++++++++++++++++++++++++++ arch/s390/kvm/kvm-s390.h | 10 ++++++++ 3 files changed, 57 insertions(+) diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 3f147b8d050b..38982c1de413 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -252,7 +252,10 @@ struct kvm_s390_sie_block { #define ECB2_IEP 0x20 #define ECB2_PFMFI 0x08 #define ECB2_ESCA 0x04 +#define ECB2_ZPCI_LSI 0x02 __u8 ecb2; /* 0x0062 */ +#define ECB3_AISI 0x20 +#define ECB3_AISII 0x10 #define ECB3_DEA 0x08 #define ECB3_AES 0x04 #define ECB3_RI 0x01 @@ -938,6 +941,7 @@ struct kvm_arch{ int use_cmma; int use_pfmfi; int use_skf; + int use_zpci_interp; int user_cpu_state_ctrl; int user_sigp; int user_stsi; diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index a680f2a02b67..361d742cdf0d 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -1023,6 +1023,47 @@ static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) return 0; } +static void kvm_s390_vcpu_pci_setup(struct kvm_vcpu *vcpu) +{ + /* + * If the facilities aren't available for PCI interpretation and + * interrupt forwarding, we shouldn't be here. + */ + if (!vcpu->kvm->arch.use_zpci_interp) + return; + + vcpu->arch.sie_block->ecb2 |= ECB2_ZPCI_LSI; + vcpu->arch.sie_block->ecb3 |= ECB3_AISII + ECB3_AISI; +} + +void kvm_s390_vcpu_pci_enable_interp(struct kvm *kvm) +{ + struct kvm_vcpu *vcpu; + int i; + + /* + * If host facilities are available, turn on interpretation for the + * life of this guest + */ + if (!test_facility(69) || !test_facility(70) || !test_facility(71) || + !test_facility(72)) + return; + + mutex_lock(&kvm->lock); + + kvm->arch.use_zpci_interp = 1; + + kvm_s390_vcpu_block_all(kvm); + + kvm_for_each_vcpu(i, vcpu, kvm) { + kvm_s390_vcpu_pci_setup(vcpu); + kvm_s390_sync_request(KVM_REQ_VSIE_RESTART, vcpu); + } + + kvm_s390_vcpu_unblock_all(kvm); + mutex_unlock(&kvm->lock); +} + static void kvm_s390_sync_request_broadcast(struct kvm *kvm, int req) { int cx; @@ -3288,6 +3329,8 @@ static int kvm_s390_vcpu_setup(struct kvm_vcpu *vcpu) kvm_s390_vcpu_crypto_setup(vcpu); + kvm_s390_vcpu_pci_setup(vcpu); + mutex_lock(&vcpu->kvm->lock); if (kvm_s390_pv_is_protected(vcpu->kvm)) { rc = kvm_s390_pv_create_cpu(vcpu, &uvrc, &uvrrc); diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index c07a050d757d..a2eccb8b977e 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -481,6 +481,16 @@ void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu, */ void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm); +/** + * kvm_s390_vcpu_pci_enable_interp + * + * Set the associated PCI attributes for each vcpu to allow for zPCI Load/Store + * interpretation as well as adapter interruption forwarding. + * + * @kvm: the KVM guest + */ +void kvm_s390_vcpu_pci_enable_interp(struct kvm *kvm); + /** * diag9c_forwarding_hz * -- 2.27.0