From patchwork Thu Oct 24 07:43:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ganesh Goudar X-Patchwork-Id: 1182672 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 46zKGc6cvDz9sPc for ; Thu, 24 Oct 2019 18:52:40 +1100 (AEDT) Received: from localhost ([::1]:34460 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iNXvC-0001ch-Ed for incoming@patchwork.ozlabs.org; Thu, 24 Oct 2019 03:52:38 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60935) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iNXmv-0006Qd-HW for qemu-devel@nongnu.org; Thu, 24 Oct 2019 03:44:07 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iNXms-0007Xc-AM for qemu-devel@nongnu.org; Thu, 24 Oct 2019 03:44:04 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:4756) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iNXmq-0007Wt-W2 for qemu-devel@nongnu.org; Thu, 24 Oct 2019 03:44:02 -0400 Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x9O7gl1a097487 for ; Thu, 24 Oct 2019 03:43:59 -0400 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 2vu6twa0hm-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 24 Oct 2019 03:43:59 -0400 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) Thu, 24 Oct 2019 08:43:52 +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 x9O7hpXR19267728 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 24 Oct 2019 07:43:51 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 58D4942042; Thu, 24 Oct 2019 07:43:51 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4BF014203F; Thu, 24 Oct 2019 07:43:49 +0000 (GMT) Received: from localhost.localdomain.com (unknown [9.85.73.55]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 24 Oct 2019 07:43:49 +0000 (GMT) From: Ganesh Goudar To: aik@ozlabs.ru, qemu-ppc@nongnu.org, qemu-devel@nongnu.org, david@gibson.dropbear.id.au Subject: [PATCH v17 1/7] Wrapper function to wait on condition for the main loop mutex Date: Thu, 24 Oct 2019 13:13:01 +0530 X-Mailer: git-send-email 2.17.2 In-Reply-To: <20191024074307.22821-1-ganeshgr@linux.ibm.com> References: <20191024074307.22821-1-ganeshgr@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19102407-0012-0000-0000-0000035CA6BE X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19102407-0013-0000-0000-00002197D815 Message-Id: <20191024074307.22821-2-ganeshgr@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-24_05:, , 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=903 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910240074 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.156.1 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: paulus@ozlabs.org, arawinda.p@gmail.com, groug@kaod.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Aravinda Prasad Introduce a wrapper function to wait on condition for the main loop mutex. This function atomically releases the main loop mutex and causes the calling thread to block on the condition. This wrapper is required because qemu_global_mutex is a static variable. Signed-off-by: Aravinda Prasad Reviewed-by: David Gibson Reviewed-by: Greg Kurz --- cpus.c | 5 +++++ include/qemu/main-loop.h | 8 ++++++++ 2 files changed, 13 insertions(+) diff --git a/cpus.c b/cpus.c index fabbeca6f4..3c8e423f74 100644 --- a/cpus.c +++ b/cpus.c @@ -1897,6 +1897,11 @@ void qemu_mutex_unlock_iothread(void) qemu_mutex_unlock(&qemu_global_mutex); } +void qemu_cond_wait_iothread(QemuCond *cond) +{ + qemu_cond_wait(cond, &qemu_global_mutex); +} + static bool all_vcpus_paused(void) { CPUState *cpu; diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h index f6ba78ea73..a6d20b0719 100644 --- a/include/qemu/main-loop.h +++ b/include/qemu/main-loop.h @@ -295,6 +295,14 @@ void qemu_mutex_lock_iothread_impl(const char *file, int line); */ void qemu_mutex_unlock_iothread(void); +/* + * qemu_cond_wait_iothread: Wait on condition for the main loop mutex + * + * This function atomically releases the main loop mutex and causes + * the calling thread to block on the condition. + */ +void qemu_cond_wait_iothread(QemuCond *cond); + /* internal interfaces */ void qemu_fd_register(int fd);