From patchwork Wed Nov 28 10:19:38 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Mueller X-Patchwork-Id: 10702271 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 DA69215A7 for ; Wed, 28 Nov 2018 10:20:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CCBAE2CF79 for ; Wed, 28 Nov 2018 10:20:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C10BC2CFAA; Wed, 28 Nov 2018 10:20:21 +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 6658E2CF9E for ; Wed, 28 Nov 2018 10:20:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728556AbeK1VV2 (ORCPT ); Wed, 28 Nov 2018 16:21:28 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:58004 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728541AbeK1VV1 (ORCPT ); Wed, 28 Nov 2018 16:21:27 -0500 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 wASAJIes019856 for ; Wed, 28 Nov 2018 05:20:18 -0500 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0b-001b2d01.pphosted.com with ESMTP id 2p1nr90a7h-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 28 Nov 2018 05:20:17 -0500 Received: from localhost by e06smtp01.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 28 Nov 2018 10:20:13 -0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id wASAKCsk51183784 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 28 Nov 2018 10:20:12 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 13AC452059; Wed, 28 Nov 2018 10:20:12 +0000 (GMT) Received: from s38lp84.lnxne.boe (unknown [9.152.108.100]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id B9C2752052; Wed, 28 Nov 2018 10:20:11 +0000 (GMT) From: Michael Mueller To: KVM Mailing List , Linux-S390 Mailing List Cc: Martin Schwidefsky , Heiko Carstens , Christian Borntraeger , Janosch Frank , David Hildenbrand , Cornelia Huck , Halil Pasic , Pierre Morel , Michael Mueller Subject: [PATCH v3 07/12] KVM: s390: factor out __find_vcpu_for_floating_irq() Date: Wed, 28 Nov 2018 11:19:38 +0100 X-Mailer: git-send-email 2.13.4 In-Reply-To: <20181128101943.155542-1-mimu@linux.ibm.com> References: <20181128101943.155542-1-mimu@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18112810-4275-0000-0000-000002E7EAD9 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18112810-4276-0000-0000-000037F52A8E Message-Id: <20181128101943.155542-8-mimu@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-11-28_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=795 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1811280093 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This function will be used as well to find a suitable vcpu to wakeup in GIB alert interruption context. Signed-off-by: Michael Mueller Reviewed-by: Cornelia Huck Reviewed-by: Pierre Morel Reviewed-by: David Hildenbrand --- arch/s390/kvm/interrupt.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index 97e5da9a0814..251d01f1e9bf 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -1723,18 +1723,14 @@ static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) return 0; } -/* - * Find a destination VCPU for a floating irq and kick it. - */ -static void __floating_irq_kick(struct kvm *kvm, u64 type) +static struct kvm_vcpu *__find_vcpu_for_floating_irq(struct kvm *kvm) { struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; - struct kvm_vcpu *dst_vcpu; int sigcpu, online_vcpus, nr_tries = 0; online_vcpus = atomic_read(&kvm->online_vcpus); if (!online_vcpus) - return; + return NULL; /* find idle VCPUs first, then round robin */ sigcpu = find_first_bit(fi->idle_mask, online_vcpus); @@ -1744,10 +1740,22 @@ static void __floating_irq_kick(struct kvm *kvm, u64 type) fi->next_rr_cpu = (fi->next_rr_cpu + 1) % online_vcpus; /* avoid endless loops if all vcpus are stopped */ if (nr_tries++ >= online_vcpus) - return; + return NULL; } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu))); } - dst_vcpu = kvm_get_vcpu(kvm, sigcpu); + return kvm_get_vcpu(kvm, sigcpu); +} + +/* + * Find a destination VCPU for a floating irq and kick it. + */ +static void __floating_irq_kick(struct kvm *kvm, u64 type) +{ + struct kvm_vcpu *dst_vcpu; + + dst_vcpu = __find_vcpu_for_floating_irq(kvm); + if (!dst_vcpu) + return; /* make the VCPU drop out of the SIE, or wake it up if sleeping */ switch (type) {