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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8E20FC4361A for ; Fri, 4 Dec 2020 11:16:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3DBA122525 for ; Fri, 4 Dec 2020 11:16:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730019AbgLDLPp (ORCPT ); Fri, 4 Dec 2020 06:15:45 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:8657 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728701AbgLDLPn (ORCPT ); Fri, 4 Dec 2020 06:15:43 -0500 Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4CnVTh1qgxz15XYj; Fri, 4 Dec 2020 19:14:32 +0800 (CST) Received: from localhost.localdomain (10.69.192.58) by DGGEMS410-HUB.china.huawei.com (10.3.19.210) with Microsoft SMTP Server id 14.3.487.0; Fri, 4 Dec 2020 19:14:25 +0800 From: John Garry To: , , , , , , , , , , CC: , , , , , , , , , John Garry Subject: [PATCH v6 03/10] perf pmu: Add pmu_id() Date: Fri, 4 Dec 2020 19:10:09 +0800 Message-ID: <1607080216-36968-4-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1607080216-36968-1-git-send-email-john.garry@huawei.com> References: <1607080216-36968-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.69.192.58] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a function to read the PMU id sysfs entry. This is only done for uncore PMUs where this would possibly be relevant. Signed-off-by: John Garry Acked-by: Kajol Jain --- tools/perf/util/pmu.c | 18 ++++++++++++++++++ tools/perf/util/pmu.h | 1 + 2 files changed, 19 insertions(+) diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index d41caeb35cf6..cbeda45ce578 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -597,6 +597,7 @@ static struct perf_cpu_map *__pmu_cpumask(const char *path) * Uncore PMUs have a "cpumask" file under sysfs. CPU PMUs (e.g. on arm/arm64) * may have a "cpus" file. */ +#define SYS_TEMPLATE_ID "./bus/event_source/devices/%s/identifier" #define CPUS_TEMPLATE_UNCORE "%s/bus/event_source/devices/%s/cpumask" #define CPUS_TEMPLATE_CPU "%s/bus/event_source/devices/%s/cpus" @@ -635,6 +636,21 @@ static bool pmu_is_uncore(const char *name) return file_available(path); } +static char *pmu_id(const char *name) +{ + char path[PATH_MAX], *str; + size_t len; + + snprintf(path, PATH_MAX, SYS_TEMPLATE_ID, name); + + if (sysfs__read_str(path, &str, &len) < 0) + return NULL; + + str[len - 1] = 0; /* remove line feed */ + + return str; +} + /* * PMU CORE devices have different name other than cpu in sysfs on some * platforms. @@ -847,6 +863,8 @@ static struct perf_pmu *pmu_lookup(const char *name) pmu->name = strdup(name); pmu->type = type; pmu->is_uncore = pmu_is_uncore(name); + if (pmu->is_uncore) + pmu->id = pmu_id(name); pmu->max_precise = pmu_max_precise(name); pmu_add_cpu_aliases(&aliases, pmu); diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h index a64e9c9ce731..d4366e8e79df 100644 --- a/tools/perf/util/pmu.h +++ b/tools/perf/util/pmu.h @@ -30,6 +30,7 @@ struct perf_pmu_caps { struct perf_pmu { char *name; + char *id; __u32 type; bool selectable; bool is_uncore; -- 2.26.2