From patchwork Thu Dec 22 16:03:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Clark X-Patchwork-Id: 13080185 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 E0F3FC4332F for ; Thu, 22 Dec 2022 16:17:46 +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=Fu16hUOEzzpSoZc3SDDwHx7/k1BVUU05u29eH/bz7RQ=; b=KL/axuSTA801rt nfj3R0yk8QB0tmjC9wEvdDwrB+65WswtVF09GYoDTxwH45gmiWPLXI0W0Z2vw36cQN4UBV4bSaUMu zSV+ABo2cDKtD8O71xNr1UC9vxAuqURsl4FA6bzce2ZcpUOZxzCPggrqTntMllGUPa3S+eFXVBu4k qdy5xK8aQbqe0hG41fCMlpMY4+V2r1Tu67e8Q/kW5VXpmm8sMaS4pZjO9tAml3v/olOUBeCWtrs1U By1q0LTArihHpVKQKoNizUkbk9WkA1YOBCSUByOxvzsJAACLcL6SAmszXFBGu2V/OHaGpp0fS/JcQ 6NlsFLda2hKMkbqY/XAA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1p8OFF-00DwNn-Iy; Thu, 22 Dec 2022 16:16:34 +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 1p8O6Z-00DrRo-Fj for linux-arm-kernel@lists.infradead.org; Thu, 22 Dec 2022 16:07:37 +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 C268A152B; Thu, 22 Dec 2022 08:08:14 -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 AA8C43FAFB; Thu, 22 Dec 2022 08:07:30 -0800 (PST) From: James Clark To: linux-perf-users@vger.kernel.org, tanmay@marvell.com Cc: sgoutham@marvell.com, gcherian@marvell.com, lcherian@marvell.com, bbhushan2@marvell.com, German Gomez , James Clark , Mathieu Poirier , Suzuki K Poulose , Mike Leach , Leo Yan , 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 v2 4/7] perf pmu: Add function to check if a pmu file exists Date: Thu, 22 Dec 2022 16:03:24 +0000 Message-Id: <20221222160328.3639989-5-james.clark@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221222160328.3639989-1-james.clark@arm.com> References: <20221222160328.3639989-1-james.clark@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221222_080735_632068_7A6E1CD2 X-CRM114-Status: GOOD ( 10.43 ) 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 | 14 ++++++++++++++ tools/perf/util/pmu.h | 2 ++ 2 files changed, 16 insertions(+) diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index 15b852b3c401..b72b2d892949 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -1739,6 +1739,20 @@ 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]; + struct stat statbuf; + + if (!perf_pmu__pathname_scnprintf(path, PATH_MAX, pmu->name, name)) + return false; + + if (!file_available(path)) + return false; + + return stat(path, &statbuf) == 0; +} + 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);