From patchwork Thu Jan 19 15:43:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Clark X-Patchwork-Id: 13108309 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 6A256C46467 for ; Thu, 19 Jan 2023 15:48:48 +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=zMfg2EWsmfuYK6M6VgCli6Uu9UTIVIzZNGjewxT9E84=; b=QQMpqPzVgcL82l WAuyJmF+8gGBBw2+cns9QkO2LMjzepU3403vvcjbosCioKGt9B6HvZ4I1g6eIGQTV7k033ziZ2pft 6+O/8XkofzhNKKOx3ERoxJ6VWwrW1h2PH2OOG/4fnk/Fwcl+3guHOy9VEG1a9xb8rmygoMHgwn7N2 3So6ulJuJHg4kOnCnUhu1EsXyMjPNitxuLApHKHmnsr3L4OT0SVR5OFQfEv2G05gh1BOOVwEXo8OW lSYLlglMhHHlE0PiszFy40GLTp5W7C6QMURIM8O8/iqsqyq+44K5gTssnNDxUYgkwpZWY84/kG6XE glbbxwhZkY8ylhHj2aUQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pIX8h-005jiD-C1; Thu, 19 Jan 2023 15:47:43 +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 1pIX7L-005j4m-HX for linux-arm-kernel@lists.infradead.org; Thu, 19 Jan 2023 15:46:21 +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 BC8E71BA8; Thu, 19 Jan 2023 07:46:58 -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 1FFD23F445; Thu, 19 Jan 2023 07:46:14 -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 v4 6/8] perf cs_etm: Record ts_source in AUXTRACE_INFO for ETMv4 and ETE Date: Thu, 19 Jan 2023 15:43:05 +0000 Message-Id: <20230119154308.3815108-7-james.clark@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230119154308.3815108-1-james.clark@arm.com> References: <20230119154308.3815108-1-james.clark@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230119_074619_767153_858B872C X-CRM114-Status: GOOD ( 15.62 ) 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 Read the value of ts_source exposed by the driver and store it in the ETMv4 and ETE header. If the interface doesn't exist (such as in older Kernels), defaults to a safe value of -1. Signed-off-by: German Gomez Signed-off-by: James Clark --- tools/perf/arch/arm/util/cs-etm.c | 48 +++++++++++++++++++++++++++++++ tools/perf/util/cs-etm-base.c | 2 ++ tools/perf/util/cs-etm.h | 2 ++ 3 files changed, 52 insertions(+) diff --git a/tools/perf/arch/arm/util/cs-etm.c b/tools/perf/arch/arm/util/cs-etm.c index b526ffe550a5..481e170cd3f1 100644 --- a/tools/perf/arch/arm/util/cs-etm.c +++ b/tools/perf/arch/arm/util/cs-etm.c @@ -53,6 +53,7 @@ static const char * const metadata_etmv4_ro[] = { [CS_ETMV4_TRCIDR2] = "trcidr/trcidr2", [CS_ETMV4_TRCIDR8] = "trcidr/trcidr8", [CS_ETMV4_TRCAUTHSTATUS] = "mgmt/trcauthstatus", + [CS_ETMV4_TS_SOURCE] = "ts_source", }; static const char * const metadata_ete_ro[] = { @@ -62,6 +63,7 @@ static const char * const metadata_ete_ro[] = { [CS_ETE_TRCIDR8] = "trcidr/trcidr8", [CS_ETE_TRCAUTHSTATUS] = "mgmt/trcauthstatus", [CS_ETE_TRCDEVARCH] = "mgmt/trcdevarch", + [CS_ETE_TS_SOURCE] = "ts_source", }; static bool cs_etm_is_etmv4(struct auxtrace_record *itr, int cpu); @@ -613,6 +615,32 @@ static int cs_etm_get_ro(struct perf_pmu *pmu, int cpu, const char *path) return val; } +static int cs_etm_get_ro_signed(struct perf_pmu *pmu, int cpu, const char *path) +{ + char pmu_path[PATH_MAX]; + int scan; + int val = 0; + + /* Get RO metadata from sysfs */ + snprintf(pmu_path, PATH_MAX, "cpu%d/%s", cpu, path); + + scan = perf_pmu__scan_file(pmu, pmu_path, "%d", &val); + if (scan != 1) + pr_err("%s: error reading: %s\n", __func__, pmu_path); + + return val; +} + +static bool cs_etm_pmu_path_exists(struct perf_pmu *pmu, int cpu, const char *path) +{ + char pmu_path[PATH_MAX]; + + /* Get RO metadata from sysfs */ + snprintf(pmu_path, PATH_MAX, "cpu%d/%s", cpu, path); + + return perf_pmu__file_exists(pmu, pmu_path); +} + #define TRCDEVARCH_ARCHPART_SHIFT 0 #define TRCDEVARCH_ARCHPART_MASK GENMASK(11, 0) #define TRCDEVARCH_ARCHPART(x) (((x) & TRCDEVARCH_ARCHPART_MASK) >> TRCDEVARCH_ARCHPART_SHIFT) @@ -654,6 +682,16 @@ static void cs_etm_save_etmv4_header(__u64 data[], struct auxtrace_record *itr, metadata_etmv4_ro[CS_ETMV4_TRCIDR8]); data[CS_ETMV4_TRCAUTHSTATUS] = cs_etm_get_ro(cs_etm_pmu, cpu, metadata_etmv4_ro[CS_ETMV4_TRCAUTHSTATUS]); + + /* Kernels older than 5.19 may not expose ts_source */ + if (cs_etm_pmu_path_exists(cs_etm_pmu, cpu, metadata_etmv4_ro[CS_ETMV4_TS_SOURCE])) + data[CS_ETMV4_TS_SOURCE] = (__u64) cs_etm_get_ro_signed(cs_etm_pmu, cpu, + metadata_etmv4_ro[CS_ETMV4_TS_SOURCE]); + else { + pr_warning("[%03d] pmu file 'ts_source' not found. Fallback to safe value (-1)\n", + cpu); + data[CS_ETMV4_TS_SOURCE] = (__u64) -1; + } } static void cs_etm_save_ete_header(__u64 data[], struct auxtrace_record *itr, int cpu) @@ -679,6 +717,16 @@ static void cs_etm_save_ete_header(__u64 data[], struct auxtrace_record *itr, in /* ETE uses the same registers as ETMv4 plus TRCDEVARCH */ data[CS_ETE_TRCDEVARCH] = cs_etm_get_ro(cs_etm_pmu, cpu, metadata_ete_ro[CS_ETE_TRCDEVARCH]); + + /* Kernels older than 5.19 may not expose ts_source */ + if (cs_etm_pmu_path_exists(cs_etm_pmu, cpu, metadata_ete_ro[CS_ETE_TS_SOURCE])) + data[CS_ETE_TS_SOURCE] = (__u64) cs_etm_get_ro_signed(cs_etm_pmu, cpu, + metadata_ete_ro[CS_ETE_TS_SOURCE]); + else { + pr_warning("[%03d] pmu file 'ts_source' not found. Fallback to safe value (-1)\n", + cpu); + data[CS_ETE_TS_SOURCE] = (__u64) -1; + } } static void cs_etm_get_metadata(int cpu, u32 *offset, diff --git a/tools/perf/util/cs-etm-base.c b/tools/perf/util/cs-etm-base.c index 282042c6e944..5f48b756c4cf 100644 --- a/tools/perf/util/cs-etm-base.c +++ b/tools/perf/util/cs-etm-base.c @@ -36,6 +36,7 @@ static const char * const cs_etmv4_priv_fmts[] = { [CS_ETMV4_TRCIDR2] = " TRCIDR2 %llx\n", [CS_ETMV4_TRCIDR8] = " TRCIDR8 %llx\n", [CS_ETMV4_TRCAUTHSTATUS] = " TRCAUTHSTATUS %llx\n", + [CS_ETMV4_TS_SOURCE] = " TS_SOURCE %lld\n", }; static const char * const cs_ete_priv_fmts[] = { @@ -50,6 +51,7 @@ static const char * const cs_ete_priv_fmts[] = { [CS_ETE_TRCIDR8] = " TRCIDR8 %llx\n", [CS_ETE_TRCAUTHSTATUS] = " TRCAUTHSTATUS %llx\n", [CS_ETE_TRCDEVARCH] = " TRCDEVARCH %llx\n", + [CS_ETE_TS_SOURCE] = " TS_SOURCE %lld\n", }; static const char * const param_unk_fmt = diff --git a/tools/perf/util/cs-etm.h b/tools/perf/util/cs-etm.h index c5925428afa9..ad790930bcbc 100644 --- a/tools/perf/util/cs-etm.h +++ b/tools/perf/util/cs-etm.h @@ -71,6 +71,7 @@ enum { CS_ETMV4_TRCIDR2, CS_ETMV4_TRCIDR8, CS_ETMV4_TRCAUTHSTATUS, + CS_ETMV4_TS_SOURCE, CS_ETMV4_PRIV_MAX, }; @@ -92,6 +93,7 @@ enum { CS_ETE_TRCIDR8, CS_ETE_TRCAUTHSTATUS, CS_ETE_TRCDEVARCH, + CS_ETE_TS_SOURCE, CS_ETE_PRIV_MAX };