From patchwork Mon Apr 24 09:44:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jing Zhang X-Patchwork-Id: 13221951 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 86288C77B61 for ; Mon, 24 Apr 2023 09:45:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=xfJXwO+KIU0NAzLQ0KILO1oChh/CyMgRWQyd+boaolg=; b=Yt4MKTvhSMIGXc 2iNK+MWbRUr2jF9SorglQmeER+tOeI8tU844x00s4vVPBQL2LrkyWXgBPC/LbOuNQi8VAYJWG2dTp DxhbAnkrqTAFLXQEC0e+zRYbN0n1HiUh0Y1gSUhHVLGcZLmzK7KBxedQAc8YasH8R+kwFdx0kpa3N Nu1egH3YCDQDVDYAnqEtZjil8EXvI1N7NbTX68ESnKo+xVVcTnmcCa3j725iJxsCXrTtHoJk8pNFN mr4AAA7xCGHzJmH8B6kGfIFXJ3Qbpp40LvaVjSl2YcR7vOjbr8UY8LAdQIyeh00EQYNrnYBurRNkO v2CtHKWqUhz+M+NkfW+w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pqskS-00Fqhk-2c; Mon, 24 Apr 2023 09:44:40 +0000 Received: from out30-100.freemail.mail.aliyun.com ([115.124.30.100]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pqskP-00FqfJ-2o for linux-arm-kernel@lists.infradead.org; Mon, 24 Apr 2023 09:44:39 +0000 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R151e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045192;MF=renyu.zj@linux.alibaba.com;NM=1;PH=DS;RN=18;SR=0;TI=SMTPD_---0VgsU8jM_1682329469; Received: from srmbuffer011165236051.sqa.net(mailfrom:renyu.zj@linux.alibaba.com fp:SMTPD_---0VgsU8jM_1682329469) by smtp.aliyun-inc.com; Mon, 24 Apr 2023 17:44:29 +0800 From: Jing Zhang To: John Garry , Ian Rogers , Will Deacon , Shuai Xue Cc: James Clark , Mike Leach , Leo Yan , Mark Rutland , Ilkka Koskinen , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Adrian Hunter , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, Zhuo Song , Jing Zhang Subject: [PATCH v2 1/5] driver/perf: Add identifier sysfs file for CMN Date: Mon, 24 Apr 2023 17:44:12 +0800 Message-Id: <1682329456-19418-2-git-send-email-renyu.zj@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1682329456-19418-1-git-send-email-renyu.zj@linux.alibaba.com> References: <1682329456-19418-1-git-send-email-renyu.zj@linux.alibaba.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230424_024438_096481_06143473 X-CRM114-Status: GOOD ( 14.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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 | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c index c968986..f425610 100644 --- a/drivers/perf/arm-cmn.c +++ b/drivers/perf/arm-cmn.c @@ -334,6 +334,7 @@ struct arm_cmn { struct pmu pmu; struct dentry *debug; + const char *identifier; }; #define to_cmn(p) container_of(p, struct arm_cmn, pmu) @@ -1168,10 +1169,41 @@ 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)); + + return sysfs_emit(buf, "%s\n", cmn->identifier); +} + +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->identifier == NULL) + 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 }; @@ -2241,6 +2273,22 @@ static int arm_cmn600_of_probe(struct device_node *np) return of_property_read_u32(np, "arm,root-node", &rootnode) ?: rootnode; } +const char *arm_cmn_identifier(unsigned long model) +{ + switch (model) { + case CMN600: + return "cmn600"; + case CMN650: + return "cmn650"; + case CMN700: + return "cmn700"; + case CI700: + return "ci700"; + default: + return NULL; + } +} + static int arm_cmn_probe(struct platform_device *pdev) { struct arm_cmn *cmn; @@ -2254,6 +2302,7 @@ static int arm_cmn_probe(struct platform_device *pdev) cmn->dev = &pdev->dev; cmn->model = (unsigned long)device_get_match_data(cmn->dev); + cmn->identifier = arm_cmn_identifier(cmn->model); platform_set_drvdata(pdev, cmn); if (cmn->model == CMN600 && has_acpi_companion(cmn->dev)) {