From nobody Mon Feb 9 21:18:53 2026 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 F2AFAC77B7C for ; Fri, 26 May 2023 21:54:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244140AbjEZVyn (ORCPT ); Fri, 26 May 2023 17:54:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243817AbjEZVyb (ORCPT ); Fri, 26 May 2023 17:54:31 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 857ADE4C for ; Fri, 26 May 2023 14:54:26 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id 3f1490d57ef6-ba8c3186735so2605244276.3 for ; Fri, 26 May 2023 14:54:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1685138065; x=1687730065; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=zl5H/LAaMs6H1Jjaws3sJN4knTClvax7RvoNDB4HmA4=; b=lkHeOxJXxITrtWC/Otgvuj9osz7kLh5qCEQEF4jM+7E0xr2PpA+cOLlZ9b5Zyiw2P2 vAM/ZhA1uVAMDxMCpPMV6dcien+7D8BM/xk665SM5OmYVqMbSjf9RPqOsQYL8e4Znqe8 Rah+SvNQxwtRUgbCM80haR4iLZ7L1oNvi7WXO61FLRifnetM4F7pxAb+K3HI0JCt1EVB Bobn3+3JPiDocFSoyZcej7VImVFmRSS4ZYOOP+owc3u5eF32Y/8J+5K21zy0BN/C/jxR hms9z9Dglo/Flf37yW09lDCcRBJ521AFqIPTPDNI4nq4H//bTKrg7NRLKlxNOwP0Ldpu 0CSA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685138065; x=1687730065; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=zl5H/LAaMs6H1Jjaws3sJN4knTClvax7RvoNDB4HmA4=; b=PiGhhW8eIIKQp5KPwuWkO2yYcjLj6QH4ZOHmYAhkoeAxfGOolt9ag5FG+1KAaIG6T3 j30LEp+5NBg/d8EVPUw0bnXghgTEMkVKaEz4AYr/pRYdMdy92qOpZ/8872UoiBCask1L EV3Hn9GNYwe3XXmG8SwaAHzVoseuQkqb963At08VoL/V12mT6ZVXdeVFFcW9PqS7Lmr7 v7EcNXjVgjcbJITiWS/2u2PBOViYvLOnimBmG/2JRg+SGAilttbiiiUPYY37liKjv5yu sCuj+ot/qr5RhQWYbY4l3Zs6JTPVhceb3CpCL0ca3gyKvneMRzVhOKG6DwMoItdzRM8B yuCQ== X-Gm-Message-State: AC+VfDz1qxCRVLKWcRbA8xXv+/jpXR8Vbehv+8q1NjZ2iwDJ3NaP+WER cWkqO4Hvwgf4r2w69adoIp31EWhmpmnv X-Google-Smtp-Source: ACHHUZ6Yw0OVQSwW5J0Snbt6TPuLc2in9MIppxGHwbx359iQrDoRDhBWkjN3g+LvKkjO3+0H/mlYB2Ay03zj X-Received: from irogers.svl.corp.google.com ([2620:15c:2d4:203:3b4e:312c:644:a642]) (user=irogers job=sendgmr) by 2002:a25:9191:0:b0:bab:a1e6:c87d with SMTP id w17-20020a259191000000b00baba1e6c87dmr1249182ybl.4.1685138065583; Fri, 26 May 2023 14:54:25 -0700 (PDT) Date: Fri, 26 May 2023 14:53:40 -0700 In-Reply-To: <20230526215410.2435674-1-irogers@google.com> Message-Id: <20230526215410.2435674-6-irogers@google.com> Mime-Version: 1.0 References: <20230526215410.2435674-1-irogers@google.com> X-Mailer: git-send-email 2.41.0.rc0.172.g3f132b7071-goog Subject: [PATCH v4 05/35] perf pmu: Detect ARM and hybrid PMUs with sysfs From: Ian Rogers To: Suzuki K Poulose , Mike Leach , Leo Yan , John Garry , Will Deacon , James Clark , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Ian Rogers , Adrian Hunter , Kajol Jain , Jing Zhang , Kan Liang , Zhengjun Xing , Ravi Bangoria , Madhavan Srinivasan , Athira Rajeev , Ming Wang , Huacai Chen , Sandipan Das , Dmitrii Dolgov <9erthalion6@gmail.com>, Sean Christopherson , Ali Saidi , Rob Herring , Thomas Richter , Kang Minchul , linux-kernel@vger.kernel.org, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" is_arm_pmu_core detects a core PMU via the presence of a "cpus" file rather than a "cpumask" file. This pattern holds for hybrid PMUs so rename the function and remove redundant perf_pmu__is_hybrid tests. Add a new helper is_pmu_hybrid similar to is_pmu_core. Signed-off-by: Ian Rogers Reviewed-by: Kan Liang --- tools/perf/util/pmu.c | 29 ++++++++++++++++++----------- tools/perf/util/pmu.h | 1 + 2 files changed, 19 insertions(+), 11 deletions(-) diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index f4f0afbc391c..7392cec725bf 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -643,12 +643,14 @@ static char *pmu_id(const char *name) return str; } =20 -/* - * PMU CORE devices have different name other than cpu in sysfs on some - * platforms. - * Looking for possible sysfs files to identify the arm core device. +/** + * is_sysfs_pmu_core() - PMU CORE devices have different name other than c= pu in + * sysfs on some platforms like ARM or Intel hybrid. Looking for + * possible the cpus file in sysfs files to identify whether this = is a + * core device. + * @name: The PMU name such as "cpu_atom". */ -static int is_arm_pmu_core(const char *name) +static int is_sysfs_pmu_core(const char *name) { char path[PATH_MAX]; =20 @@ -814,7 +816,7 @@ void pmu_add_cpu_aliases_table(struct list_head *head, = struct perf_pmu *pmu, struct pmu_add_cpu_aliases_map_data data =3D { .head =3D head, .name =3D pmu->name, - .cpu_name =3D is_arm_pmu_core(pmu->name) ? pmu->name : "cpu", + .cpu_name =3D is_sysfs_pmu_core(pmu->name) ? pmu->name : "cpu", .pmu =3D pmu, }; =20 @@ -1647,22 +1649,27 @@ static int cmp_sevent(const void *a, const void *b) =20 bool is_pmu_core(const char *name) { - return !strcmp(name, "cpu") || is_arm_pmu_core(name); + return !strcmp(name, "cpu") || is_sysfs_pmu_core(name); +} + +bool is_pmu_hybrid(const char *name) +{ + return !strcmp(name, "cpu_atom") || !strcmp(name, "cpu_core"); } =20 bool perf_pmu__supports_legacy_cache(const struct perf_pmu *pmu) { - return is_pmu_core(pmu->name) || perf_pmu__is_hybrid(pmu->name); + return is_pmu_core(pmu->name); } =20 bool perf_pmu__supports_wildcard_numeric(const struct perf_pmu *pmu) { - return is_pmu_core(pmu->name) || perf_pmu__is_hybrid(pmu->name); + return is_pmu_core(pmu->name); } =20 bool perf_pmu__auto_merge_stats(const struct perf_pmu *pmu) { - return !perf_pmu__is_hybrid(pmu->name); + return !is_pmu_hybrid(pmu->name); } =20 static bool pmu_alias_is_duplicate(struct sevent *alias_a, @@ -1716,7 +1723,7 @@ void print_pmu_events(const struct print_callbacks *p= rint_cb, void *print_state) pmu =3D NULL; j =3D 0; while ((pmu =3D perf_pmu__scan(pmu)) !=3D NULL) { - bool is_cpu =3D is_pmu_core(pmu->name) || perf_pmu__is_hybrid(pmu->name); + bool is_cpu =3D is_pmu_core(pmu->name); =20 list_for_each_entry(event, &pmu->aliases, list) { aliases[j].event =3D event; diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h index 0e0cb6283594..f50919f1b34c 100644 --- a/tools/perf/util/pmu.h +++ b/tools/perf/util/pmu.h @@ -220,6 +220,7 @@ void perf_pmu__del_formats(struct list_head *formats); struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu); =20 bool is_pmu_core(const char *name); +bool is_pmu_hybrid(const char *name); bool perf_pmu__supports_legacy_cache(const struct perf_pmu *pmu); bool perf_pmu__supports_wildcard_numeric(const struct perf_pmu *pmu); bool perf_pmu__auto_merge_stats(const struct perf_pmu *pmu); --=20 2.41.0.rc0.172.g3f132b7071-goog