From nobody Sun Sep 14 16:29:01 2025 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 62448C27C7C for ; Fri, 20 Jan 2023 14:40:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229904AbjATOkI (ORCPT ); Fri, 20 Jan 2023 09:40:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42836 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230042AbjATOkE (ORCPT ); Fri, 20 Jan 2023 09:40:04 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id C6BB96191; Fri, 20 Jan 2023 06:39:25 -0800 (PST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D4A671576; Fri, 20 Jan 2023 06:38:51 -0800 (PST) Received: from e126815.warwick.arm.com (e126815.arm.com [10.32.32.26]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 3F5FB3F67D; Fri, 20 Jan 2023 06:38:07 -0800 (PST) From: James Clark To: linux-perf-users@vger.kernel.org, tanmay@marvell.com, leo.yan@linaro.org, mike.leach@linaro.org Cc: sgoutham@marvell.com, gcherian@marvell.com, lcherian@marvell.com, bbhushan2@marvell.com, German Gomez , James Clark , Mathieu Poirier , Suzuki K Poulose , John Garry , Will Deacon , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 4/8] perf pmu: Add function to check if a pmu file exists Date: Fri, 20 Jan 2023 14:36:57 +0000 Message-Id: <20230120143702.4035046-5-james.clark@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230120143702.4035046-1-james.clark@arm.com> References: <20230120143702.4035046-1-james.clark@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: German Gomez Add a utility function perf_pmu__file_exists() to check if a given pmu file exists in the sysfs filesystem. Signed-off-by: German Gomez Signed-off-by: James Clark --- tools/perf/util/pmu.c | 10 ++++++++++ tools/perf/util/pmu.h | 2 ++ 2 files changed, 12 insertions(+) diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index 23e1d70fa343..8abf5b8439a7 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -1742,6 +1742,16 @@ int perf_pmu__scan_file(struct perf_pmu *pmu, const = char *name, const char *fmt, return ret; } =20 +bool perf_pmu__file_exists(struct perf_pmu *pmu, const char *name) +{ + char path[PATH_MAX]; + + if (!perf_pmu__pathname_scnprintf(path, sizeof(path), pmu->name, name)) + return false; + + return file_available(path); +} + static int perf_pmu__new_caps(struct list_head *list, char *name, char *va= lue) { struct perf_pmu_caps *caps =3D zalloc(sizeof(*caps)); diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h index 742d4db319a0..2bdc560f19c7 100644 --- a/tools/perf/util/pmu.h +++ b/tools/perf/util/pmu.h @@ -230,6 +230,8 @@ bool pmu_have_event(const char *pname, const char *name= ); =20 int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char= *fmt, ...) __scanf(3, 4); =20 +bool perf_pmu__file_exists(struct perf_pmu *pmu, const char *name); + int perf_pmu__test(void); =20 struct perf_event_attr *perf_pmu__get_default_config(struct perf_pmu *pmu); --=20 2.25.1