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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4FE57C4167E for ; Thu, 3 Mar 2022 21:04:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236425AbiCCVFY (ORCPT ); Thu, 3 Mar 2022 16:05:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45292 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236424AbiCCVFX (ORCPT ); Thu, 3 Mar 2022 16:05:23 -0500 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ED4E21E3C9; Thu, 3 Mar 2022 13:04:36 -0800 (PST) Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 223KVeZI007486; Thu, 3 Mar 2022 21:04:36 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=8Qnp+7u/RoRqnZq6DkTcz52CR0pJ0rkXttTIoufRqBw=; b=QHtLbtC+J27oLDc0Uf6VsFa++81nuHa9T+QneNeP5AN7kBjiJ8Lbsh4+kjapK+wBxlz5 cGceklWD84rzN/V43dyqTRnHQUJJLYxIGvyeJijva2oI2qF6t2Is7YNp0UTFv8OLEVfh GvWoSFa16TDfWmQ7J3jyQ9yUDlKfvaq2HyQP6Hus4DFyKEC2EhOXPeQfMrx5ppSjJLZk AUCVX9O2jf/Lo5gU3/jZQRgaWerFmBfkPd/D7OOaLY0csy4XJZInHgvZkV3eadsHCfAW weTg6+DxKRWgIDg++08yLxHQbJl9hF4rJwEmqMM9JJplciXzHxCaEHpRoYsjr7/ukboA Cg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 3ek4ssrhvr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 03 Mar 2022 21:04:36 +0000 Received: from m0098404.ppops.net (m0098404.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 223Kh30X023192; Thu, 3 Mar 2022 21:04:35 GMT Received: from ppma05fra.de.ibm.com (6c.4a.5195.ip4.static.sl-reverse.com [149.81.74.108]) by mx0a-001b2d01.pphosted.com with ESMTP id 3ek4ssrhv8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 03 Mar 2022 21:04:35 +0000 Received: from pps.filterd (ppma05fra.de.ibm.com [127.0.0.1]) by ppma05fra.de.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 223L3OE2011629; Thu, 3 Mar 2022 21:04:33 GMT Received: from b06avi18878370.portsmouth.uk.ibm.com (b06avi18878370.portsmouth.uk.ibm.com [9.149.26.194]) by ppma05fra.de.ibm.com with ESMTP id 3ek4ka8248-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 03 Mar 2022 21:04:32 +0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 223L4RZF42598812 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 3 Mar 2022 21:04:27 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 258AB11C064; Thu, 3 Mar 2022 21:04:27 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1418311C054; Thu, 3 Mar 2022 21:04:27 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Thu, 3 Mar 2022 21:04:27 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 4958) id 87785E041D; Thu, 3 Mar 2022 22:04:26 +0100 (CET) From: Eric Farman To: Thomas Huth , Janosch Frank , Claudio Imbrenda Cc: David Hildenbrand , kvm@vger.kernel.org, linux-s390@vger.kernel.org, Eric Farman Subject: [PATCH kvm-unit-tests v1 5/6] s390x: smp: Create and use a non-waiting CPU restart Date: Thu, 3 Mar 2022 22:04:24 +0100 Message-Id: <20220303210425.1693486-6-farman@linux.ibm.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220303210425.1693486-1-farman@linux.ibm.com> References: <20220303210425.1693486-1-farman@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: giwdTDTW5Pz5lGtP_RhZU28Vb-NATvni X-Proofpoint-GUID: LPowO8qmZTxO18F2a8lB8DoJbZRvIoG_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.64.514 definitions=2022-03-03_09,2022-02-26_01,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 mlxlogscore=999 mlxscore=0 suspectscore=0 phishscore=0 spamscore=0 impostorscore=0 priorityscore=1501 clxscore=1015 adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2203030095 Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org The kvm-unit-tests infrastructure for a CPU restart waits for the SIGP RESTART to complete. In order to test the restart itself, create a variation that does not wait, and test the state of the CPU directly. While here, add some better report prefixes/messages, to clarify which condition is being examined (similar to test_stop_store_status()). Signed-off-by: Eric Farman --- lib/s390x/smp.c | 22 ++++++++++++++++++++++ lib/s390x/smp.h | 1 + s390x/smp.c | 18 +++++++++++++++--- 3 files changed, 38 insertions(+), 3 deletions(-) diff --git a/lib/s390x/smp.c b/lib/s390x/smp.c index 84e536e8..85b046a5 100644 --- a/lib/s390x/smp.c +++ b/lib/s390x/smp.c @@ -192,6 +192,28 @@ int smp_cpu_restart(uint16_t idx) return rc; } +/* + * Functionally equivalent to smp_cpu_restart(), but without the + * elements that wait/serialize matters here in the test. + * Used to see if KVM itself is serialized correctly. + */ +int smp_cpu_restart_nowait(uint16_t idx) +{ + spin_lock(&lock); + + /* Don't suppress a CC2 with sigp_retry() */ + if (smp_sigp(idx, SIGP_RESTART, 0, NULL)) { + spin_unlock(&lock); + return -1; + } + + cpus[idx].active = true; + + spin_unlock(&lock); + + return 0; +} + int smp_cpu_start(uint16_t idx, struct psw psw) { int rc; diff --git a/lib/s390x/smp.h b/lib/s390x/smp.h index bae03dfd..24a0e2e0 100644 --- a/lib/s390x/smp.h +++ b/lib/s390x/smp.h @@ -42,6 +42,7 @@ uint16_t smp_cpu_addr(uint16_t idx); bool smp_cpu_stopped(uint16_t idx); bool smp_sense_running_status(uint16_t idx); int smp_cpu_restart(uint16_t idx); +int smp_cpu_restart_nowait(uint16_t idx); int smp_cpu_start(uint16_t idx, struct psw psw); int smp_cpu_stop(uint16_t idx); int smp_cpu_stop_nowait(uint16_t idx); diff --git a/s390x/smp.c b/s390x/smp.c index 11c2c673..03160b80 100644 --- a/s390x/smp.c +++ b/s390x/smp.c @@ -55,23 +55,35 @@ static void test_restart(void) struct cpu *cpu = smp_cpu_from_idx(1); struct lowcore *lc = cpu->lowcore; + report_prefix_push("restart"); + report_prefix_push("stopped"); + lc->restart_new_psw.mask = extract_psw_mask(); lc->restart_new_psw.addr = (unsigned long)test_func; /* Make sure cpu is stopped */ smp_cpu_stop(1); set_flag(0); - smp_cpu_restart(1); + smp_cpu_restart_nowait(1); + report(!smp_cpu_stopped(1), "cpu started"); wait_for_flag(); + report_pass("test flag"); + + report_prefix_pop(); + report_prefix_push("running"); /* * Wait until cpu 1 has set the flag because it executed the * restart function. */ set_flag(0); - smp_cpu_restart(1); + smp_cpu_restart_nowait(1); + report(!smp_cpu_stopped(1), "cpu started"); wait_for_flag(); - report_pass("restart while running"); + report_pass("test flag"); + + report_prefix_pop(); + report_prefix_pop(); } static void test_stop(void) -- 2.32.0