From patchwork Mon Mar 7 05:43:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Aneesh Kumar K.V" X-Patchwork-Id: 12771185 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id D118AC433EF for ; Mon, 7 Mar 2022 05:44:22 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 669A18D0003; Mon, 7 Mar 2022 00:44:22 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 618B68D0001; Mon, 7 Mar 2022 00:44:22 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4B7A68D0003; Mon, 7 Mar 2022 00:44:22 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0084.hostedemail.com [216.40.44.84]) by kanga.kvack.org (Postfix) with ESMTP id 3D02E8D0001 for ; Mon, 7 Mar 2022 00:44:22 -0500 (EST) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id DE0E5814DD6F for ; Mon, 7 Mar 2022 05:44:21 +0000 (UTC) X-FDA: 79216499922.24.9F190BA Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by imf07.hostedemail.com (Postfix) with ESMTP id 4C08340005 for ; Mon, 7 Mar 2022 05:44:21 +0000 (UTC) Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 2275TGMc018727; Mon, 7 Mar 2022 05:44:16 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=ti3f8Ky6IPa0GFH54YUCkDxcUy+GzAy2l2rTZTwg1nU=; b=ImvC1kEoukG47gXY3cWCKoCtrprpMf+74I/9FrsyHV4d63VZHTgtujl2L+MwAzhHc3g7 p1qSviHY5kHsS0tR0W/ssa3x1If5L3s+7Nz0k6FAmdvw/ltWfS1ZJrEr9csa60KdwpeS fI0MnSw/aM6GTmvCEhspY6nFDn6kZjm1bYgzMpPJA/AW6E/5idI9+T+q8gcIGhBAEE2c +ww9HFVaZizNwWkxlFNClW66CotNO93FugHfWUHSXlirAxLjKNI15y/ebys3F1TFCknq s+NCGUvji1Ay2wii8pMySG7O9t01d3mUvq91ThV1Sq+bpRBbptHKGqFDY863x//Cf3+d nA== Received: from ppma03wdc.us.ibm.com (ba.79.3fa9.ip4.static.sl-reverse.com [169.63.121.186]) by mx0b-001b2d01.pphosted.com with ESMTP id 3emtmwchjy-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 07 Mar 2022 05:44:15 +0000 Received: from pps.filterd (ppma03wdc.us.ibm.com [127.0.0.1]) by ppma03wdc.us.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 2275eEwC012510; Mon, 7 Mar 2022 05:44:15 GMT Received: from b01cxnp22035.gho.pok.ibm.com (b01cxnp22035.gho.pok.ibm.com [9.57.198.25]) by ppma03wdc.us.ibm.com with ESMTP id 3ekyg9bja1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 07 Mar 2022 05:44:15 +0000 Received: from b01ledav002.gho.pok.ibm.com (b01ledav002.gho.pok.ibm.com [9.57.199.107]) by b01cxnp22035.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 2275iEVS47382888 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 7 Mar 2022 05:44:14 GMT Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4124F12405E; Mon, 7 Mar 2022 05:44:14 +0000 (GMT) Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B8F33124052; Mon, 7 Mar 2022 05:44:10 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.43.89.15]) by b01ledav002.gho.pok.ibm.com (Postfix) with ESMTP; Mon, 7 Mar 2022 05:44:10 +0000 (GMT) From: "Aneesh Kumar K.V" To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, Mike Rapoport , Shuah Khan , linux-kselftest@vger.kernel.org, Mike Rapoport , "Aneesh Kumar K . V" Subject: [PATCH v4 2/2] selftest/vm: add helpers to detect PAGE_SIZE and PAGE_SHIFT Date: Mon, 7 Mar 2022 11:13:55 +0530 Message-Id: <20220307054355.149820-2-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220307054355.149820-1-aneesh.kumar@linux.ibm.com> References: <20220307054355.149820-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: DazFF_TSArwjCJBK-unF4_o-WT1pD-Yf X-Proofpoint-ORIG-GUID: DazFF_TSArwjCJBK-unF4_o-WT1pD-Yf 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=2022-03-07_01,2022-03-04_01,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 impostorscore=0 clxscore=1015 mlxscore=0 mlxlogscore=997 bulkscore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 phishscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2203070033 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 4C08340005 X-Rspam-User: Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b=ImvC1kEo; spf=pass (imf07.hostedemail.com: domain of aneesh.kumar@linux.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=aneesh.kumar@linux.ibm.com; dmarc=pass (policy=none) header.from=ibm.com X-Stat-Signature: fs9rsjutae1my5w9wztgmi4udpd5fc4u X-HE-Tag: 1646631861-504619 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Mike Rapoport PAGE_SIZE is not 4096 in many configurations, particularly ppc64 uses 64K pages in majority of cases. Add helpers to detect PAGE_SIZE and PAGE_SHIFT dynamically. Without this tests are broken w.r.t reading /proc/self/pagemap if (pread(pagemap_fd, ent, sizeof(ent), (uintptr_t)ptr >> (PAGE_SHIFT - 3)) != sizeof(ent)) err(2, "read pagemap"); Cc: Shuah Khan Cc: linux-kselftest@vger.kernel.org Signed-off-by: Mike Rapoport Signed-off-by: Aneesh Kumar K.V --- tools/testing/selftests/vm/gup_test.c | 3 ++- tools/testing/selftests/vm/util.h | 27 ++++++++++++++++++++++++--- 2 files changed, 26 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/vm/gup_test.c b/tools/testing/selftests/vm/gup_test.c index fe043f67798b..cda837a14736 100644 --- a/tools/testing/selftests/vm/gup_test.c +++ b/tools/testing/selftests/vm/gup_test.c @@ -10,8 +10,9 @@ #include #include "../../../../mm/gup_test.h" +#include "util.h" + #define MB (1UL << 20) -#define PAGE_SIZE sysconf(_SC_PAGESIZE) /* Just the flags we need, copied from mm.h: */ #define FOLL_WRITE 0x01 /* check pte is writable */ diff --git a/tools/testing/selftests/vm/util.h b/tools/testing/selftests/vm/util.h index 0f0a0f345d76..b27d26199334 100644 --- a/tools/testing/selftests/vm/util.h +++ b/tools/testing/selftests/vm/util.h @@ -6,11 +6,32 @@ #include #include #include +#include /* ffsl() */ +#include /* _SC_PAGESIZE */ -#define PAGE_SHIFT 12 -#define HPAGE_SHIFT 21 +static unsigned int __page_size; +static unsigned int __page_shift; -#define PAGE_SIZE (1 << PAGE_SHIFT) +static inline unsigned int page_size(void) +{ + if (!__page_size) + __page_size = sysconf(_SC_PAGESIZE); + return __page_size; +} + +static inline unsigned int page_shift(void) +{ + if (!__page_shift) + __page_shift = (ffsl(page_size()) - 1); + return __page_shift; +} + +#define PAGE_SHIFT (page_shift()) +#define PAGE_SIZE (page_size()) +/* + * On ppc64 this will only work with radix 2M hugepage size + */ +#define HPAGE_SHIFT 21 #define HPAGE_SIZE (1 << HPAGE_SHIFT) #define PAGEMAP_PRESENT(ent) (((ent) & (1ull << 63)) != 0)