From patchwork Tue Jul 4 08:32:31 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hao QingFeng X-Patchwork-Id: 9824321 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E853060237 for ; Tue, 4 Jul 2017 08:35:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D773127FB1 for ; Tue, 4 Jul 2017 08:35:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C9F492811A; Tue, 4 Jul 2017 08:35:33 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B270D27FB1 for ; Tue, 4 Jul 2017 08:35:32 +0000 (UTC) Received: from localhost ([::1]:39442 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dSJIx-0006Yh-Vy for patchwork-qemu-devel@patchwork.kernel.org; Tue, 04 Jul 2017 04:35:32 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38671) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dSJGK-0004h3-6C for qemu-devel@nongnu.org; Tue, 04 Jul 2017 04:32:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dSJGG-0004c1-88 for qemu-devel@nongnu.org; Tue, 04 Jul 2017 04:32:48 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:34156 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 1dSJGG-0004bX-1W for qemu-devel@nongnu.org; Tue, 04 Jul 2017 04:32:44 -0400 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v648TDvP082806 for ; Tue, 4 Jul 2017 04:32:42 -0400 Received: from e06smtp10.uk.ibm.com (e06smtp10.uk.ibm.com [195.75.94.106]) by mx0b-001b2d01.pphosted.com with ESMTP id 2bg6gcv39e-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 04 Jul 2017 04:32:42 -0400 Received: from localhost by e06smtp10.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 4 Jul 2017 09:32:36 +0100 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v648WaOa39125228; Tue, 4 Jul 2017 08:32:36 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E729352041; Tue, 4 Jul 2017 08:29:02 +0100 (BST) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTPS id DFEB15204C; Tue, 4 Jul 2017 08:29:02 +0100 (BST) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 5569) id D071720F67C; Tue, 4 Jul 2017 10:32:35 +0200 (CEST) From: QingFeng Hao To: qemu-devel@nongnu.org, qemu-block@nongnu.org Date: Tue, 4 Jul 2017 10:32:31 +0200 X-Mailer: git-send-email 2.11.2 In-Reply-To: <20170704083231.98056-1-haoqf@linux.vnet.ibm.com> References: <20170704083231.98056-1-haoqf@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17070408-0040-0000-0000-000003BAC414 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17070408-0041-0000-0000-000025B52247 Message-Id: <20170704083231.98056-2-haoqf@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-07-04_04:, , 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-1707040147 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 v3 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, cohuck@kernel.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP 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=iothread0 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 Reviewed-by: Cornelia Huck --- hw/s390x/virtio-ccw.c | 2 +- target/s390x/cpu.h | 6 +++++- 2 files changed, 6 insertions(+), 2 deletions(-) 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"); - if (!kvm_eventfds_enabled()) { + if (kvm_enabled() && !kvm_eventfds_enabled()) { dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD; } diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h index 9faca04b52..bdb9bdbc9d 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -1264,7 +1264,11 @@ static inline int s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch_id, int vq, bool assign) { - return kvm_s390_assign_subch_ioeventfd(notifier, sch_id, vq, assign); + if (kvm_enabled()) { + return kvm_s390_assign_subch_ioeventfd(notifier, sch_id, vq, assign); + } else { + return 0; + } } static inline void s390_crypto_reset(void)