From patchwork Tue Jan 3 16:20:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Clark X-Patchwork-Id: 13087789 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 73E7CC3DA7D for ; Tue, 3 Jan 2023 18:05:32 +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:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version: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=IBp7Fs+cJUsf1yxfDiNiP609vOwzrHFvgbG4AtmcHUY=; b=XNaWSrE92pczUp a0WNqtnKZv7Ghyp1cMWpaJBf7uB9a3KzUQxlxtAzbPkfIVaZHOEHlR4AIXdIa9SPKwn7hUSiGgK9u 7orAxptBSFAHFWx5Z2bnOPOrzQ87iL2L6qo5twHf+rj8sumCc1u3xbjpGlClvJlXGztwwcAwrbkTW TbyYChJRMrTV8XHh2RHmG+tb4SG514QrkoPvAxh0tJ6tTgTpgJmH1VthpVoGK0y0HRLvwf+mWMs5U R7WqaAPGpzAVAy195BgBL3Ad8Bxx2wXngEOh6BTePWKuowaDodW1Z5I89BE9FI48SN0Jq4iCOECum FzW+yqeCavuUY5VQRTqg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pCldd-003h9k-P8; Tue, 03 Jan 2023 18:03:50 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pCk2k-002sHL-4g for linux-arm-kernel@lists.infradead.org; Tue, 03 Jan 2023 16:21:40 +0000 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 89C221516; Tue, 3 Jan 2023 08:22:18 -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 CFA183F71A; Tue, 3 Jan 2023 08:21:33 -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 v3 4/7] perf pmu: Add function to check if a pmu file exists Date: Tue, 3 Jan 2023 16:20:38 +0000 Message-Id: <20230103162042.423694-5-james.clark@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230103162042.423694-1-james.clark@arm.com> References: <20230103162042.423694-1-james.clark@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230103_082138_284558_72EC7CCA X-CRM114-Status: GOOD ( 10.19 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 7a4e243a370d..3529556d57dc 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -1741,6 +1741,16 @@ int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt, return ret; } +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 *value) { struct perf_pmu_caps *caps = zalloc(sizeof(*caps)); diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h index 8f39e2d17fb1..c1d138fe9602 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); int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt, ...) __scanf(3, 4); +bool perf_pmu__file_exists(struct perf_pmu *pmu, const char *name); + int perf_pmu__test(void); struct perf_event_attr *perf_pmu__get_default_config(struct perf_pmu *pmu);