From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A9A9BC33CB1 for ; Fri, 17 Jan 2020 09:41:20 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 7D77820842 for ; Fri, 17 Jan 2020 09:41:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7D77820842 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:54510 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1isO7z-00009K-9X for qemu-devel@archiver.kernel.org; Fri, 17 Jan 2020 04:41:19 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:49473) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1isO67-0006vD-Ld for qemu-devel@nongnu.org; Fri, 17 Jan 2020 04:39:27 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1isO64-0006wZ-6B for qemu-devel@nongnu.org; Fri, 17 Jan 2020 04:39:23 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:4974) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1isO63-0006vj-Ub for qemu-devel@nongnu.org; Fri, 17 Jan 2020 04:39:20 -0500 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 00H9b8i3056777 for ; Fri, 17 Jan 2020 04:39:18 -0500 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0a-001b2d01.pphosted.com with ESMTP id 2xk0qsxsmy-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 17 Jan 2020 04:39:18 -0500 Received: from localhost by e06smtp04.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) Fri, 17 Jan 2020 09:39:12 -0000 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 00H9dBNp37028226 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 17 Jan 2020 09:39:11 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7714AAE045; Fri, 17 Jan 2020 09:39:11 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E6089AE055; Fri, 17 Jan 2020 09:39:09 +0000 (GMT) Received: from localhost.in.ibm.com (unknown [9.124.35.97]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 17 Jan 2020 09:39:09 +0000 (GMT) From: Ganesh Goudar To: aik@ozlabs.ru, qemu-ppc@nongnu.org, qemu-devel@nongnu.org, david@gibson.dropbear.id.au Subject: [PATCH v20 1/7] Wrapper function to wait on condition for the main loop mutex Date: Fri, 17 Jan 2020 15:08:49 +0530 X-Mailer: git-send-email 2.17.2 In-Reply-To: <20200117093855.19074-1-ganeshgr@linux.ibm.com> References: <20200117093855.19074-1-ganeshgr@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 20011709-0016-0000-0000-000002DE32F9 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20011709-0017-0000-0000-00003340CE2C Message-Id: <20200117093855.19074-2-ganeshgr@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-01-17_02:2020-01-16, 2020-01-17 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 suspectscore=0 mlxlogscore=788 impostorscore=0 adultscore=0 mlxscore=0 priorityscore=1501 bulkscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-2001170074 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, Ganesh Goudar , Aravinda Prasad , groug@kaod.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.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 Signed-off-by: Ganesh Goudar 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 be2d655f37..c06a2ad20b 100644 --- a/cpus.c +++ b/cpus.c @@ -1839,6 +1839,11 @@ 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); -- 2.17.2