From patchwork Thu Apr 27 05:18:22 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nikunj A. Dadhania" X-Patchwork-Id: 9702371 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 0F002602CC for ; Thu, 27 Apr 2017 05:23:31 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F3060285EB for ; Thu, 27 Apr 2017 05:23:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E318628602; Thu, 27 Apr 2017 05:23:30 +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=-6.4 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RCVD_IN_SORBS_SPAM 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 A0D9B285EB for ; Thu, 27 Apr 2017 05:23:30 +0000 (UTC) Received: from localhost ([::1]:58778 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3btp-0003Zt-T8 for patchwork-qemu-devel@patchwork.kernel.org; Thu, 27 Apr 2017 01:23:29 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56598) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3bqB-0000rJ-IK for qemu-devel@nongnu.org; Thu, 27 Apr 2017 01:19:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3bq9-0002ZG-UR for qemu-devel@nongnu.org; Thu, 27 Apr 2017 01:19:43 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:38742 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 1d3bq9-0002Z9-O8 for qemu-devel@nongnu.org; Thu, 27 Apr 2017 01:19:41 -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 v3R5IbcW139678 for ; Thu, 27 Apr 2017 01:19:36 -0400 Received: from e23smtp03.au.ibm.com (e23smtp03.au.ibm.com [202.81.31.145]) by mx0b-001b2d01.pphosted.com with ESMTP id 2a3a4e0g6s-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 27 Apr 2017 01:19:36 -0400 Received: from localhost by e23smtp03.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Thu, 27 Apr 2017 15:19:30 +1000 Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by d23relay10.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v3R5JMM61048840; Thu, 27 Apr 2017 15:19:30 +1000 Received: from d23av03.au.ibm.com (localhost [127.0.0.1]) by d23av03.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id v3R5IqrZ003709; Thu, 27 Apr 2017 15:18:53 +1000 Received: from abhimanyu.ibmmodules.com ([9.85.81.18]) by d23av03.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id v3R5IfnB002984; Thu, 27 Apr 2017 15:18:50 +1000 From: Nikunj A Dadhania To: qemu-ppc@nongnu.org, david@gibson.dropbear.id.au Date: Thu, 27 Apr 2017 10:48:22 +0530 X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170427051824.30194-1-nikunj@linux.vnet.ibm.com> References: <20170427051824.30194-1-nikunj@linux.vnet.ibm.com> X-TM-AS-MML: disable x-cbid: 17042705-0008-0000-0000-00000125EA15 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17042705-0009-0000-0000-00000953B516 Message-Id: <20170427051824.30194-5-nikunj@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-04-27_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-1704270085 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 4/6] cpus: Fix CPU unplug for MTTCG 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: bharata@linux.vnet.ibm.com, alex.bennee@linaro.org, qemu-devel@nongnu.org, nikunj@linux.vnet.ibm.com, rth@twiddle.net Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Bharata B Rao Ensure that the unplugged CPU thread is destroyed and the waiting thread is notified about it. This is needed for CPU unplug to work correctly in MTTCG mode. Signed-off-by: Bharata B Rao Signed-off-by: Nikunj A Dadhania --- cpus.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/cpus.c b/cpus.c index 740b8dc..79f780b 100644 --- a/cpus.c +++ b/cpus.c @@ -1483,6 +1483,12 @@ static void *qemu_tcg_cpu_thread_fn(void *arg) /* Ignore everything else? */ break; } + } else if (cpu->unplug) { + qemu_tcg_destroy_vcpu(cpu); + cpu->created = false; + qemu_cond_signal(&qemu_cpu_cond); + qemu_mutex_unlock_iothread(); + return NULL; } atomic_mb_set(&cpu->exit_request, 0);