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 89C79C74A5B for ; Mon, 27 Mar 2023 02:46:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231971AbjC0Cqc (ORCPT ); Sun, 26 Mar 2023 22:46:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57472 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231928AbjC0Cq3 (ORCPT ); Sun, 26 Mar 2023 22:46:29 -0400 Received: from out30-100.freemail.mail.aliyun.com (out30-100.freemail.mail.aliyun.com [115.124.30.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 42A8444BD; Sun, 26 Mar 2023 19:46:27 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R191e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046049;MF=renyu.zj@linux.alibaba.com;NM=1;PH=DS;RN=17;SR=0;TI=SMTPD_---0VeeqFPR_1679885183; Received: from srmbuffer011165236051.sqa.net(mailfrom:renyu.zj@linux.alibaba.com fp:SMTPD_---0VeeqFPR_1679885183) by smtp.aliyun-inc.com; Mon, 27 Mar 2023 10:46:24 +0800 From: Jing Zhang To: John Garry , Ian Rogers , Will Deacon , James Clark , Mike Leach , Leo Yan , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Adrian Hunter Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, Shuai Xue , Zhuo Song , Jing Zhang Subject: [PATCH RFC 1/4] driver/perf: Add identifier sysfs file for CMN Date: Mon, 27 Mar 2023 10:46:09 +0800 Message-Id: <1679885172-95021-2-git-send-email-renyu.zj@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1679885172-95021-1-git-send-email-renyu.zj@linux.alibaba.com> References: <1679885172-95021-1-git-send-email-renyu.zj@linux.alibaba.com> Precedence: bulk List-ID: X-Mailing-List: linux-perf-users@vger.kernel.org To allow userspace to identify the specific implementation of the device, add an "identifier" sysfs file. The perf tool can match the arm CMN metric through the identifier. Signed-off-by: Jing Zhang --- drivers/perf/arm-cmn.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c index c968986..0c138ad 100644 --- a/drivers/perf/arm-cmn.c +++ b/drivers/perf/arm-cmn.c @@ -1168,10 +1168,53 @@ static ssize_t arm_cmn_cpumask_show(struct device *dev, .attrs = arm_cmn_cpumask_attrs, }; +static ssize_t arm_cmn_identifier_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct arm_cmn *cmn = to_cmn(dev_get_drvdata(dev)); + if (cmn->model == CMN700) { + return sysfs_emit(buf, "%s\n", "CMN700"); + } + else if (cmn->model == CMN650) { + return sysfs_emit(buf, "%s\n", "CMN650"); + } + else if (cmn->model == CMN600) { + return sysfs_emit(buf, "%s\n", "CMN600"); + } + else if (cmn->model == CI700) { + return sysfs_emit(buf, "%s\n", "CI700"); + } + return sysfs_emit(buf, "%s\n", "UNKNOWN"); +} + +static umode_t arm_cmn_identifier_attr_visible(struct kobject *kobj, + struct attribute *attr, int n) +{ + struct device *dev = kobj_to_dev(kobj); + struct arm_cmn *cmn = to_cmn(dev_get_drvdata(dev)); + if (cmn->model <= 0) + return 0; + return attr->mode; +}; + +static struct device_attribute arm_cmn_identifier_attr = +__ATTR(identifier, 0444, arm_cmn_identifier_show, NULL); + +static struct attribute *arm_cmn_identifier_attrs[] = { + &arm_cmn_identifier_attr.attr, + NULL, +}; + +static struct attribute_group arm_cmn_identifier_attr_group = { + .attrs = arm_cmn_identifier_attrs, + .is_visible = arm_cmn_identifier_attr_visible, +}; + static const struct attribute_group *arm_cmn_attr_groups[] = { &arm_cmn_event_attrs_group, &arm_cmn_format_attrs_group, &arm_cmn_cpumask_attr_group, + &arm_cmn_identifier_attr_group, NULL }; -- 1.8.3.1