From patchwork Thu Jan 24 12:59:35 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Mueller X-Patchwork-Id: 10778901 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 9C23B1515 for ; Thu, 24 Jan 2019 13:00:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 418D42EA71 for ; Thu, 24 Jan 2019 13:00:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3551E2EBE3; Thu, 24 Jan 2019 13:00:17 +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 7A1252EBDA for ; Thu, 24 Jan 2019 13:00:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728058AbfAXNAP (ORCPT ); Thu, 24 Jan 2019 08:00:15 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:48384 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728033AbfAXNAO (ORCPT ); Thu, 24 Jan 2019 08:00:14 -0500 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x0OCsZkU000931 for ; Thu, 24 Jan 2019 08:00:13 -0500 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0b-001b2d01.pphosted.com with ESMTP id 2q7bh5ftdd-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 24 Jan 2019 08:00:12 -0500 Received: from localhost by e06smtp02.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 24 Jan 2019 13:00:08 -0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x0OD06lU52428866 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 24 Jan 2019 13:00:06 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9681A52054; Thu, 24 Jan 2019 13:00:06 +0000 (GMT) Received: from s38lp84.lnxne.boe (unknown [9.152.108.100]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 4CC775206D; Thu, 24 Jan 2019 13:00:06 +0000 (GMT) From: Michael Mueller To: KVM Mailing List Cc: Linux-S390 Mailing List , linux-kernel@vger.kernel.org, Martin Schwidefsky , Heiko Carstens , Christian Borntraeger , Janosch Frank , David Hildenbrand , Cornelia Huck , Halil Pasic , Pierre Morel , Michael Mueller Subject: [PATCH v6 09/13] KVM: s390: add the GIB and its related life-cyle functions Date: Thu, 24 Jan 2019 13:59:35 +0100 X-Mailer: git-send-email 2.13.4 In-Reply-To: <20190124125939.130763-1-mimu@linux.ibm.com> References: <20190124125939.130763-1-mimu@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19012413-0008-0000-0000-000002B565B2 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19012413-0009-0000-0000-0000222199FD Message-Id: <20190124125939.130763-10-mimu@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-01-24_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=2 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=8.0.1-1810050000 definitions=main-1901240095 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The Guest Information Block (GIB) links the GISA of all guests that have adapter interrupts pending. These interrupts cannot be delivered because all vcpus of these guests are currently in WAIT state or have masked the respective Innterruption Sub Class (ISC). If enabled, a GIB alert is issued on the host to schedule these guests to run suitable vcpus to consume the pending interruptions. This mechanism allows to process adapter interrupts for currently not running guests. The GIB is created during host initialization and associated with the Adapter Interruption Facility in case an Adapter Interruption Virtualization Facility is available. The GIB initialization and thus the activation of the related code will be done in an upcoming patch of this series. Signed-off-by: Michael Mueller Reviewed-by: Janosch Frank Reviewed-by: Christian Borntraeger Reviewed-by: Cornelia Huck Reviewed-by: Pierre Morel Acked-by: Halil Pasic --- arch/s390/include/asm/kvm_host.h | 9 +++++++++ arch/s390/kvm/interrupt.c | 43 ++++++++++++++++++++++++++++++++++++++++ arch/s390/kvm/kvm-s390.c | 1 + arch/s390/kvm/kvm-s390.h | 2 ++ 4 files changed, 55 insertions(+) diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 0941571d34eb..397af0d33539 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -784,6 +784,15 @@ struct kvm_s390_gisa { }; }; +struct kvm_s390_gib { + u32 alert_list_origin; + u32 reserved01; + u8:5; + u8 nisc:3; + u8 reserved03[3]; + u32 reserved04[5]; +}; + /* * sie_page2 has to be allocated as DMA because fac_list, crycb and * gisa need 31bit addresses in the sie control block. diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index ee91d1de0036..5efcd9e2cf8f 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -7,6 +7,9 @@ * Author(s): Carsten Otte */ +#define KMSG_COMPONENT "kvm-s390" +#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt + #include #include #include @@ -31,6 +34,8 @@ #define PFAULT_DONE 0x0680 #define VIRTIO_PARAM 0x0d00 +static struct kvm_s390_gib *gib; + /* handle external calls via sigp interpretation facility */ static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id) { @@ -2914,3 +2919,41 @@ void kvm_s390_gisa_destroy(struct kvm *kvm) { kvm->arch.gisa_int.origin = NULL; } + +void kvm_s390_gib_destroy(void) +{ + if (!gib) + return; + chsc_sgib(0); + free_page((unsigned long)gib); + gib = NULL; +} + +int kvm_s390_gib_init(u8 nisc) +{ + int rc = 0; + + if (!css_general_characteristics.aiv) { + KVM_EVENT(3, "%s", "gib not initialized, no AIV facility"); + goto out; + } + + gib = (struct kvm_s390_gib *)get_zeroed_page(GFP_KERNEL | GFP_DMA); + if (!gib) { + rc = -ENOMEM; + goto out; + } + + gib->nisc = nisc; + if (chsc_sgib((u32)(u64)gib)) { + pr_err("Associating the GIB with the AIV facility failed\n"); + free_page((unsigned long)gib); + gib = NULL; + rc = -EIO; + goto out; + } + + KVM_EVENT(3, "gib 0x%pK (nisc=%d) initialized", gib, gib->nisc); +out: + return rc; +} diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 4c855cb67699..118d4c0bbb8e 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -444,6 +444,7 @@ int kvm_arch_init(void *opaque) void kvm_arch_exit(void) { + kvm_s390_gib_destroy(); debug_unregister(kvm_s390_dbf); } diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index 72ef87799593..6d9448dbd052 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -381,6 +381,8 @@ int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, void kvm_s390_gisa_init(struct kvm *kvm); void kvm_s390_gisa_clear(struct kvm *kvm); void kvm_s390_gisa_destroy(struct kvm *kvm); +int kvm_s390_gib_init(u8 nisc); +void kvm_s390_gib_destroy(void); /* implemented in guestdbg.c */ void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);