From patchwork Mon Mar 27 02:46:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jing Zhang X-Patchwork-Id: 13188504 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 EE0B6C74A5B for ; Mon, 27 Mar 2023 02:47:23 +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=jcqOWs8DnMGdiXSgMrRPCscpXvFFs3mMlr7huXwcKow=; b=p0guYKlTFKVolG FG7m5APKCndiDv1Q9bQ6d62MfWrctiiFXK+y1+X8X3+SkJ7XHcwc6EdxWZ6+5w7JOfxh0aPj2oM9+ 6mYz1CSDzhxOgc2H0azPuqvlNw91imVGRC7lb+OMiOZDahfZ1jnRMfOOLv70oUZQrVrRqThpXpGuz 5ZfIk3O1uxEwpFukFQ6kdgmALU8WN90X/Y6AizkcZRNX0rTSDONO1GqkKLS2tNlyyixMAOS38sVK7 up+ZlFSI6IgsXhVLk2fOsFfP6yfhv1hK4m1C1VzAbUEhK4Uos6iIiZ3bCmxQ8xE3T1yi2U9gq0IAn hejZJYWijQdGABGzUneA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pgcsY-009YwZ-1x; Mon, 27 Mar 2023 02:46:38 +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 1pgcsT-009Ysf-2N for linux-arm-kernel@lists.infradead.org; Mon, 27 Mar 2023 02:46:35 +0000 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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230326_194633_946346_799502E1 X-CRM114-Status: GOOD ( 12.24 ) 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 | 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 };