From patchwork Mon Nov 19 17:25:33 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Mueller X-Patchwork-Id: 10688985 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 BBF8214DB for ; Mon, 19 Nov 2018 17:26:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9F66C29699 for ; Mon, 19 Nov 2018 17:26:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9406B296D0; Mon, 19 Nov 2018 17:26:10 +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 3F98E29699 for ; Mon, 19 Nov 2018 17:26:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404530AbeKTDuc (ORCPT ); Mon, 19 Nov 2018 22:50:32 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:45240 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2404559AbeKTDuc (ORCPT ); Mon, 19 Nov 2018 22:50:32 -0500 Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id wAJHPJYX118783 for ; Mon, 19 Nov 2018 12:26:07 -0500 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 2nv1b70p78-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 19 Nov 2018 12:26:07 -0500 Received: from localhost by e06smtp03.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) Mon, 19 Nov 2018 17:26:02 -0000 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id wAJHQ1Lw1442294 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 19 Nov 2018 17:26:01 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F010F4C04E; Mon, 19 Nov 2018 17:26:00 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8235F4C05E; Mon, 19 Nov 2018 17:26:00 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 19 Nov 2018 17:26:00 +0000 (GMT) From: Michael Mueller To: kvm@vger.kernel.org, linux-s390@vger.kernel.org Cc: Martin Schwidefsky , Heiko Carstens , Christian Borntraeger , Janosch Frank , David Hildenbrand , Cornelia Huck , Michael Mueller , Halil Pasic , Pierre Morel Subject: [PATCH v2 09/12] KVM: s390: add function process_gib_alert_list() Date: Mon, 19 Nov 2018 18:25:33 +0100 X-Mailer: git-send-email 2.16.4 In-Reply-To: <20181119172536.52649-1-mimu@linux.ibm.com> References: <20181119172536.52649-1-mimu@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18111917-0012-0000-0000-000002CCD82C X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18111917-0013-0000-0000-00002101FD4A Message-Id: <20181119172536.52649-10-mimu@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-11-19_06:,, 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=803 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1811190159 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 processes a gib alert list. It is required to run when either a gib alert interruption has been received or a gisa that might be in the alert list is cleared or dropped. Signed-off-by: Michael Mueller --- arch/s390/kvm/interrupt.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index 8676596f6b5c..443d1804d611 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -2910,6 +2910,34 @@ static void nullify_gisa(struct kvm_s390_gisa *gisa) gisa->next_alert = (u32)(u64)gisa; } +/* + * Before processing, the gib alert list needs to be cut-off from + * the gib by means of function unlink_gib_alert_list(). If non NULL, + * the list is processed from its latest to oldest entry. + * + * Processing an gisa entry needs to wake-up a vcpu of the kvm this gisa + * belongs to. Thus, the pending guest interruption will be processed + * in SIE context. + */ +static void __maybe_unused process_gib_alert_list(void) +{ + struct kvm_s390_gisa *gisa = unlink_gib_alert_list(); + struct kvm_s390_gisa *next_alert; + struct kvm_vcpu *vcpu; + struct kvm *kvm; + + for (; gisa; gisa = next_alert) { + next_alert = (struct kvm_s390_gisa *)(u64)gisa->next_alert; + /* unlink from alert list */ + gisa->next_alert = (u32)(u64)gisa; + /* wake-up a vcpu of the kvm this gisa belongs to */ + kvm = container_of(gisa, struct sie_page2, gisa)->kvm; + vcpu = __find_vcpu_for_floating_irq(kvm); + if (vcpu) + kvm_s390_vcpu_wakeup(vcpu); + } +} + void kvm_s390_gisa_clear(struct kvm *kvm) { if (kvm->arch.gisa) {