From nobody Tue May 7 10:30:28 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1499071964116958.0124996689599; Mon, 3 Jul 2017 01:52:44 -0700 (PDT) Received: from localhost ([::1]:33456 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dRx62-0006Kr-Oz for importer@patchew.org; Mon, 03 Jul 2017 04:52:42 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39040) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dRx4k-0005cS-Cy for qemu-devel@nongnu.org; Mon, 03 Jul 2017 04:51:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dRx4h-0004Od-Bk for qemu-devel@nongnu.org; Mon, 03 Jul 2017 04:51:22 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:49176 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dRx4h-0004Ng-5e for qemu-devel@nongnu.org; Mon, 03 Jul 2017 04:51:19 -0400 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v638n1W1031418 for ; Mon, 3 Jul 2017 04:51:18 -0400 Received: from e06smtp11.uk.ibm.com (e06smtp11.uk.ibm.com [195.75.94.107]) by mx0b-001b2d01.pphosted.com with ESMTP id 2bexvwkxm2-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 03 Jul 2017 04:51:18 -0400 Received: from localhost by e06smtp11.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Mon, 3 Jul 2017 09:51:13 +0100 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v638pDvP33095734; Mon, 3 Jul 2017 08:51:13 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5205D42045; Mon, 3 Jul 2017 09:48:45 +0100 (BST) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 40BF24203F; Mon, 3 Jul 2017 09:48:45 +0100 (BST) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Mon, 3 Jul 2017 09:48:45 +0100 (BST) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 5569) id 9AA6D20F67C; Mon, 3 Jul 2017 10:51:12 +0200 (CEST) From: QingFeng Hao To: qemu-devel@nongnu.org, qemu-block@nongnu.org Date: Mon, 3 Jul 2017 10:51:07 +0200 X-Mailer: git-send-email 2.11.2 In-Reply-To: <20170703085107.16547-1-haoqf@linux.vnet.ibm.com> References: <20170703085107.16547-1-haoqf@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17070308-0040-0000-0000-000003D9B61E X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17070308-0041-0000-0000-000020740EAD Message-Id: <20170703085107.16547-2-haoqf@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-07-03_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1707030147 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH v2 1/1] virtio-scsi-ccw: use ioeventfd even when KVM is disabled X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, zyimin@linux.vnet.ibm.com, famz@redhat.com, QingFeng Hao , peterx@redhat.com, borntraeger@de.ibm.com, stefanha@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" This patch is based on a similar patch from Stefan Hajnoczi - commit c324fd0a39c (" virtio-pci: use ioeventfd even when KVM is disabled) Do not check kvm_eventfds_enabled() when KVM is disabled since it always returns 0. Since commit 8c56c1a592b5092d91da8d8943c17777d6462a6f ("memory: emulate ioeventfd") it has been possible to use ioeventfds in qtest or TCG mode. This patch makes -device virtio-scsi-ccw,iothread=3Diothread0 work even when KVM is disabled. I have tested that virtio-scsi-ccw works under tcg both with and without iothread. This patch fixes qemu-iotests 068, which was accidentally merged early despite the dependency on ioeventfd. Signed-off-by: QingFeng Hao --- hw/s390x/virtio-ccw.c | 2 +- target/s390x/kvm.c | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 90d37cb9ff..35896eb007 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -711,7 +711,7 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *= dev, Error **errp) sch->cssid, sch->ssid, sch->schid, sch->devno, ccw_dev->devno.valid ? "user-configured" : "auto-configured"); =20 - if (!kvm_eventfds_enabled()) { + if (kvm_enabled() && !kvm_eventfds_enabled()) { dev->flags &=3D ~VIRTIO_CCW_FLAG_USE_IOEVENTFD; } =20 diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c index a3d00196f4..c37f9c3b9e 100644 --- a/target/s390x/kvm.c +++ b/target/s390x/kvm.c @@ -2220,6 +2220,9 @@ int kvm_s390_assign_subch_ioeventfd(EventNotifier *no= tifier, uint32_t sch, .addr =3D sch, .len =3D 8, }; + if (!kvm_enabled()) { + return 0; + } if (!kvm_check_extension(kvm_state, KVM_CAP_IOEVENTFD)) { return -ENOSYS; } --=20 2.11.2