From patchwork Thu Dec 1 09:17:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nico Boehr X-Patchwork-Id: 13061096 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 4A2D3C43217 for ; Thu, 1 Dec 2022 09:17:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229701AbiLAJRv (ORCPT ); Thu, 1 Dec 2022 04:17:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50522 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229472AbiLAJRu (ORCPT ); Thu, 1 Dec 2022 04:17:50 -0500 Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7DFFC4A584 for ; Thu, 1 Dec 2022 01:17:49 -0800 (PST) Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 2B18hk1Z023154 for ; Thu, 1 Dec 2022 09:17:48 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=uZFMsWS4UXmBb15fiB+SKADQFETP/AliynsMxzffjug=; b=Bd0Ravdyw+v4QaAY7OnSky8TpZKHfyYF0AWmlMqSR+MaLRWeBfWRPOQgAyMMXR+Fb1sT RJpmQM7Ooqpduy+TS5HHZFIZMtowzmneeOwqnGtYQG19tl1c2vlZFjH+59n7NO2sEcq/ gnvdZvjd4FoSdykUR0LkbcBi8VkNkoSa4WVln2rAihPrR66Ivrhwu7HYrAA7hmL3qaVX zfzqNvYNJrYKD+6tb2TNDk/yAwoYU9LVpV8Lhs4qSgKYCMaWYSb0759TBxroDpxEg+q4 hdf9oLwrz0iRjGAKCnXzfGe4wyeVJ0KsxiEzIco3T5W8FuNVXZJX1FZJupASDChm5HZU GA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com (PPS) with ESMTPS id 3m6s0nh5yh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 01 Dec 2022 09:17:48 +0000 Received: from m0098419.ppops.net (m0098419.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 2B18tK9v008093 for ; Thu, 1 Dec 2022 09:17:48 GMT Received: from ppma02fra.de.ibm.com (47.49.7a9f.ip4.static.sl-reverse.com [159.122.73.71]) by mx0b-001b2d01.pphosted.com (PPS) with ESMTPS id 3m6s0nh5xs-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 01 Dec 2022 09:17:48 +0000 Received: from pps.filterd (ppma02fra.de.ibm.com [127.0.0.1]) by ppma02fra.de.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 2B1969am027066; Thu, 1 Dec 2022 09:17:46 GMT Received: from b06cxnps3074.portsmouth.uk.ibm.com (d06relay09.portsmouth.uk.ibm.com [9.149.109.194]) by ppma02fra.de.ibm.com with ESMTP id 3m3ae954kh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 01 Dec 2022 09:17:46 +0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 2B19Hgxr64225788 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 1 Dec 2022 09:17:42 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BCB4AA4040; Thu, 1 Dec 2022 09:17:42 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 91FC1A4057; Thu, 1 Dec 2022 09:17:42 +0000 (GMT) Received: from a46lp57.lnxne.boe (unknown [9.152.108.100]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 1 Dec 2022 09:17:42 +0000 (GMT) From: Nico Boehr To: kvm@vger.kernel.org Cc: frankja@linux.ibm.com, imbrenda@linux.ibm.com, thuth@redhat.com Subject: [kvm-unit-tests PATCH v4 2/2] s390x: add CMM test during migration Date: Thu, 1 Dec 2022 10:17:41 +0100 Message-Id: <20221201091741.3772856-3-nrb@linux.ibm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20221201091741.3772856-1-nrb@linux.ibm.com> References: <20221201091741.3772856-1-nrb@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: D3lW1S4qE1a6CYtHMszVsJimNlaSZCQ4 X-Proofpoint-ORIG-GUID: dPJYTibuzvhLbM0ewlNB29Yp_lOc8eIw X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-12-01_04,2022-11-30_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 phishscore=0 clxscore=1015 mlxscore=0 lowpriorityscore=0 adultscore=0 bulkscore=0 mlxlogscore=999 malwarescore=0 spamscore=0 priorityscore=1501 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2212010062 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add a test which modifies CMM page states while migration is in progress. Signed-off-by: Nico Boehr Reviewed-by: Thomas Huth --- s390x/Makefile | 1 + s390x/migration-during-cmm.c | 123 +++++++++++++++++++++++++++++++++++ s390x/unittests.cfg | 5 ++ 3 files changed, 129 insertions(+) create mode 100644 s390x/migration-during-cmm.c diff --git a/s390x/Makefile b/s390x/Makefile index 401cb6371cee..64c7c04409ae 100644 --- a/s390x/Makefile +++ b/s390x/Makefile @@ -39,6 +39,7 @@ tests += $(TEST_DIR)/panic-loop-extint.elf tests += $(TEST_DIR)/panic-loop-pgm.elf tests += $(TEST_DIR)/migration-sck.elf tests += $(TEST_DIR)/exittime.elf +tests += $(TEST_DIR)/migration-during-cmm.elf pv-tests += $(TEST_DIR)/pv-diags.elf diff --git a/s390x/migration-during-cmm.c b/s390x/migration-during-cmm.c new file mode 100644 index 000000000000..7e1f9590ae50 --- /dev/null +++ b/s390x/migration-during-cmm.c @@ -0,0 +1,123 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Perform CMMA actions while migrating. + * + * Copyright IBM Corp. 2022 + * + * Authors: + * Nico Boehr + */ + +#include +#include +#include +#include + +#define NUM_PAGES 128 + +/* + * Allocate 3 pages more than we need so we can start at different offsets. + * This ensures page states change on every loop iteration. + */ +static uint8_t pagebuf[(NUM_PAGES + 3) * PAGE_SIZE] __attribute__((aligned(PAGE_SIZE))); + +static unsigned int thread_iters; +static int thread_should_exit; +static int thread_exited; +struct cmm_verify_result result; + +static void test_cmm_during_migration(void) +{ + uint8_t *pagebuf_start; + /* + * The second CPU must not print to the console, otherwise it will race with + * the primary CPU on the SCLP buffer. + */ + while (!READ_ONCE(thread_should_exit)) { + /* + * Start on a offset different from the last iteration so page states change with + * every iteration. This is why pagebuf has 3 extra pages. + */ + pagebuf_start = pagebuf + (thread_iters % 4) * PAGE_SIZE; + cmm_set_page_states(pagebuf_start, NUM_PAGES); + + /* + * Always increment even if the verify fails. This ensures primary CPU knows where + * we left off and can do an additional verify round after migration finished. + */ + thread_iters++; + + result = cmm_verify_page_states(pagebuf_start, NUM_PAGES); + if (result.verify_failed) + break; + } + + WRITE_ONCE(thread_exited, 1); +} + +static void migrate_once(void) +{ + static bool migrated; + + if (migrated) + return; + + migrated = true; + puts("Please migrate me, then press return\n"); + (void)getchar(); +} + +int main(void) +{ + bool has_essa = check_essa_available(); + + report_prefix_push("migration-during-cmm"); + if (!has_essa) { + report_skip("ESSA is not available"); + goto error; + } + + if (smp_query_num_cpus() == 1) { + report_skip("need at least 2 cpus for this test"); + goto error; + } + + smp_cpu_setup(1, PSW_WITH_CUR_MASK(test_cmm_during_migration)); + + migrate_once(); + + WRITE_ONCE(thread_should_exit, 1); + + while (!thread_exited) + mb(); + + report_info("thread completed %u iterations", thread_iters); + + report_prefix_push("during migration"); + cmm_report_verify(&result); + report_prefix_pop(); + + /* + * Verification of page states occurs on the thread. We don't know if we + * were still migrating during the verification. + * To be sure, make another verification round after the migration + * finished to catch page states which might not have been migrated + * correctly. + */ + report_prefix_push("after migration"); + assert(thread_iters > 0); + result = cmm_verify_page_states(pagebuf + ((thread_iters - 1) % 4) * PAGE_SIZE, NUM_PAGES); + cmm_report_verify(&result); + report_prefix_pop(); + +error: + /* + * If we just exit and don't ask migrate_cmd to migrate us, it + * will just hang forever. Hence, also ask for migration when we + * skip this test altogether. + */ + migrate_once(); + + report_prefix_pop(); + return report_summary(); +} diff --git a/s390x/unittests.cfg b/s390x/unittests.cfg index 3caf81eda396..f6889bd4da01 100644 --- a/s390x/unittests.cfg +++ b/s390x/unittests.cfg @@ -208,3 +208,8 @@ groups = migration [exittime] file = exittime.elf smp = 2 + +[migration-during-cmm] +file = migration-during-cmm.elf +groups = migration +smp = 2