From patchwork Wed Aug 18 19:40:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Poirier X-Patchwork-Id: 12445177 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9F526C4338F for ; Wed, 18 Aug 2021 19:43:37 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 65F66610A3 for ; Wed, 18 Aug 2021 19:43:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 65F66610A3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org 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=Za8xfcdNb1lN1h8xbL18Jwz04BTgchCzUckqmCjQluk=; b=PhOrS2MfiH1U+t k4fcLg+2MxCJz+DbkVifgg/H5kRz2f0mEp1DppCSihFZ+TOpqseJy1bYqNK42wQBEFVdqpAsQiuG4 8shC+N82el0chwj5RLmNPQCoIasy3i29excDtyeY9ZIkJnSrwNf4qGFJUyEBLADSKh6bzabLBZHFg LI2I7Iu107MP23b/uU1xTk6SS5jgpDHttqDCElPvl3ApKZvuy3WSq0J/H73aqhyfYBKJ+MVOlijFb eJLopppEnHP+yL8g+cf85kPaRGaSjR7Vr198P0zmYsnNHcNMccqTUUc9d927nA0eiJ/28R3G5CGcB THpd6RQ36wxHQ8bHsliA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mGRRh-006Vuh-IB; Wed, 18 Aug 2021 19:41:53 +0000 Received: from mail-pg1-x529.google.com ([2607:f8b0:4864:20::529]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mGRQN-006VTD-KQ for linux-arm-kernel@lists.infradead.org; Wed, 18 Aug 2021 19:40:35 +0000 Received: by mail-pg1-x529.google.com with SMTP id r2so3376872pgl.10 for ; Wed, 18 Aug 2021 12:40:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=BKK6GCj1XIDVJxHe90NCqlt7jeTSriotfSvfITU6TMc=; b=njjHP6W1+kWtcSSeoM4kPyPpyO7hoHKgtRt4ULCIMh7wHP0HWSk2uDVKhqhPDNZNID aOv9RWQnuvw1YoDBDN9FoCMdqCbY4XhSwSqqvj0w6Uqbgq645DjFt94FxCSSr+cGjPFS GMovPKlfdiSd784PRXgqQ8Fc+nejlhSyewqJh7lhBNNNf+nFHoyCsjCFq9kf2uoAEdrP A5mI+CSv0PjKgSBAfV1SGIRQEsGAuSBUJxcrH/9kdhK54ce5MqpcyomFMcP7mG3WZ39A QWmbSTk03jm/PrdhY7Ci3QKTMr+YmBY1Y3H4fKDTWSA9uVI2Tz/F5QaHFkL77VtWl60f 8ltw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=BKK6GCj1XIDVJxHe90NCqlt7jeTSriotfSvfITU6TMc=; b=BJ5dduUZmbk6jMh6+CkqI+ZAFab1Si/hzve1nD2cK+zdETeXQ7vIvnrSfjbSyflBfQ TsrUxxIZwKWki8sszdmUfq5XCjP5BJocLx1mECNzw9WbJErFFmuhhsFpvMiAWljOzt4q gjsWDPQfEGfsmUA99EGHBcO+ThUFBTyLPzfFpLY9NI7jyAXxkTpdlH7sX3M5xjitef3m RvQSjlVgNhw2ZMcQ7h/SxBD4lMkXSlA/4ZnkeMBBNKIBnyWm6FmaZ49291LqeOrOtYGG 5LvPJlR2Vtp5JHkeO6njcNu/1jn0D9Eoeg6uZiG09Ise5C+6PvtKQo6FV7bkY7BkifYB MueQ== X-Gm-Message-State: AOAM5309kDtaOkRwtgh3HNRDw+k9JIcQS0N9cs7ic2qqx5fnWfT5Pjs2 3m8Uc/iM7LjVbWSinVHKbdZk+IIgXqHz/Q== X-Google-Smtp-Source: ABdhPJyZ9Qz2gapwZZ6t7idoqz1dMCXz1CUskRsJOhw1Uin5E4SyezE0/9V+2OTcU9kpFWHz2X40tg== X-Received: by 2002:a63:f341:: with SMTP id t1mr10488251pgj.149.1629315630826; Wed, 18 Aug 2021 12:40:30 -0700 (PDT) Received: from p14s.cg.shawcable.net (S0106889e681aac74.cg.shawcable.net. [68.147.0.187]) by smtp.gmail.com with ESMTPSA id k12sm2960137pjg.6.2021.08.18.12.40.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Aug 2021 12:40:30 -0700 (PDT) From: Mathieu Poirier To: gregkh@linuxfoundation.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 04/11] coresight: etm-perf: Update to handle configuration selection Date: Wed, 18 Aug 2021 13:40:15 -0600 Message-Id: <20210818194022.379573-5-mathieu.poirier@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210818194022.379573-1-mathieu.poirier@linaro.org> References: <20210818194022.379573-1-mathieu.poirier@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210818_124031_771325_CD7369A5 X-CRM114-Status: GOOD ( 32.87 ) 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: Mike Leach Loaded coresight configurations are registered in the cs_etm\events sub directory. This extends the etm-perf code to handle these registrations, and the cs_syscfg driver to perform the registration on load. Signed-off-by: Mike Leach Link: https://lore.kernel.org/r/20210723165444.1048-5-mike.leach@linaro.org Signed-off-by: Mathieu Poirier --- .../hwtracing/coresight/coresight-config.h | 2 + .../hwtracing/coresight/coresight-etm-perf.c | 134 ++++++++++++++---- .../hwtracing/coresight/coresight-etm-perf.h | 8 ++ .../hwtracing/coresight/coresight-syscfg.c | 11 ++ 4 files changed, 127 insertions(+), 28 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-config.h b/drivers/hwtracing/coresight/coresight-config.h index 5a39cbbc38a4..0667581822c1 100644 --- a/drivers/hwtracing/coresight/coresight-config.h +++ b/drivers/hwtracing/coresight/coresight-config.h @@ -126,6 +126,7 @@ struct cscfg_feature_desc { * @nr_presets: Number of sets of presets supplied by this configuration. * @nr_total_params: Sum of all parameters declared by used features * @presets: Array of preset values. + * @event_ea: Extended attribute for perf event value * */ struct cscfg_config_desc { @@ -137,6 +138,7 @@ struct cscfg_config_desc { int nr_presets; int nr_total_params; const u64 *presets; /* nr_presets * nr_total_params */ + struct dev_ext_attribute *event_ea; }; /** diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c index b582e92cdea4..e42ab919ddc3 100644 --- a/drivers/hwtracing/coresight/coresight-etm-perf.c +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c @@ -18,8 +18,10 @@ #include #include +#include "coresight-config.h" #include "coresight-etm-perf.h" #include "coresight-priv.h" +#include "coresight-syscfg.h" static struct pmu etm_pmu; static bool etm_perf_up; @@ -57,8 +59,13 @@ PMU_FORMAT_ATTR(contextid1, "config:" __stringify(ETM_OPT_CTXTID)); PMU_FORMAT_ATTR(contextid2, "config:" __stringify(ETM_OPT_CTXTID2)); PMU_FORMAT_ATTR(timestamp, "config:" __stringify(ETM_OPT_TS)); PMU_FORMAT_ATTR(retstack, "config:" __stringify(ETM_OPT_RETSTK)); +/* preset - if sink ID is used as a configuration selector */ +PMU_FORMAT_ATTR(preset, "config:0-3"); /* Sink ID - same for all ETMs */ PMU_FORMAT_ATTR(sinkid, "config2:0-31"); +/* config ID - set if a system configuration is selected */ +PMU_FORMAT_ATTR(configid, "config2:32-63"); + /* * contextid always traces the "PID". The PID is in CONTEXTIDR_EL1 @@ -88,6 +95,8 @@ static struct attribute *etm_config_formats_attr[] = { &format_attr_timestamp.attr, &format_attr_retstack.attr, &format_attr_sinkid.attr, + &format_attr_preset.attr, + &format_attr_configid.attr, NULL, }; @@ -105,9 +114,19 @@ static const struct attribute_group etm_pmu_sinks_group = { .attrs = etm_config_sinks_attr, }; +static struct attribute *etm_config_events_attr[] = { + NULL, +}; + +static const struct attribute_group etm_pmu_events_group = { + .name = "events", + .attrs = etm_config_events_attr, +}; + static const struct attribute_group *etm_pmu_attr_groups[] = { &etm_pmu_format_group, &etm_pmu_sinks_group, + &etm_pmu_events_group, NULL, }; @@ -286,7 +305,7 @@ static void *etm_setup_aux(struct perf_event *event, void **pages, INIT_WORK(&event_data->work, free_event_data); /* First get the selected sink from user space. */ - if (event->attr.config2) { + if (event->attr.config2 & GENMASK_ULL(31, 0)) { id = (u32)event->attr.config2; sink = user_sink = coresight_get_sink_by_id(id); } @@ -658,68 +677,127 @@ static ssize_t etm_perf_sink_name_show(struct device *dev, return scnprintf(buf, PAGE_SIZE, "0x%lx\n", (unsigned long)(ea->var)); } -int etm_perf_add_symlink_sink(struct coresight_device *csdev) +static struct dev_ext_attribute * +etm_perf_add_symlink_group(struct device *dev, const char *name, const char *group_name) { - int ret; + struct dev_ext_attribute *ea; unsigned long hash; - const char *name; + int ret; struct device *pmu_dev = etm_pmu.dev; - struct device *dev = &csdev->dev; - struct dev_ext_attribute *ea; - - if (csdev->type != CORESIGHT_DEV_TYPE_SINK && - csdev->type != CORESIGHT_DEV_TYPE_LINKSINK) - return -EINVAL; - - if (csdev->ea != NULL) - return -EINVAL; if (!etm_perf_up) - return -EPROBE_DEFER; + return ERR_PTR(-EPROBE_DEFER); ea = devm_kzalloc(dev, sizeof(*ea), GFP_KERNEL); if (!ea) - return -ENOMEM; + return ERR_PTR(-ENOMEM); - name = dev_name(dev); - /* See function coresight_get_sink_by_id() to know where this is used */ + /* + * If this function is called adding a sink then the hash is used for + * sink selection - see function coresight_get_sink_by_id(). + * If adding a configuration then the hash is used for selection in + * cscfg_activate_config() + */ hash = hashlen_hash(hashlen_string(NULL, name)); sysfs_attr_init(&ea->attr.attr); ea->attr.attr.name = devm_kstrdup(dev, name, GFP_KERNEL); if (!ea->attr.attr.name) - return -ENOMEM; + return ERR_PTR(-ENOMEM); ea->attr.attr.mode = 0444; - ea->attr.show = etm_perf_sink_name_show; ea->var = (unsigned long *)hash; ret = sysfs_add_file_to_group(&pmu_dev->kobj, - &ea->attr.attr, "sinks"); + &ea->attr.attr, group_name); - if (!ret) - csdev->ea = ea; + return ret ? ERR_PTR(ret) : ea; +} - return ret; +int etm_perf_add_symlink_sink(struct coresight_device *csdev) +{ + const char *name; + struct device *dev = &csdev->dev; + int err = 0; + + if (csdev->type != CORESIGHT_DEV_TYPE_SINK && + csdev->type != CORESIGHT_DEV_TYPE_LINKSINK) + return -EINVAL; + + if (csdev->ea != NULL) + return -EINVAL; + + name = dev_name(dev); + csdev->ea = etm_perf_add_symlink_group(dev, name, "sinks"); + if (IS_ERR(csdev->ea)) { + err = PTR_ERR(csdev->ea); + csdev->ea = NULL; + } else + csdev->ea->attr.show = etm_perf_sink_name_show; + + return err; } -void etm_perf_del_symlink_sink(struct coresight_device *csdev) +static void etm_perf_del_symlink_group(struct dev_ext_attribute *ea, const char *group_name) { struct device *pmu_dev = etm_pmu.dev; - struct dev_ext_attribute *ea = csdev->ea; + sysfs_remove_file_from_group(&pmu_dev->kobj, + &ea->attr.attr, group_name); +} + +void etm_perf_del_symlink_sink(struct coresight_device *csdev) +{ if (csdev->type != CORESIGHT_DEV_TYPE_SINK && csdev->type != CORESIGHT_DEV_TYPE_LINKSINK) return; - if (!ea) + if (!csdev->ea) return; - sysfs_remove_file_from_group(&pmu_dev->kobj, - &ea->attr.attr, "sinks"); + etm_perf_del_symlink_group(csdev->ea, "sinks"); csdev->ea = NULL; } +static ssize_t etm_perf_cscfg_event_show(struct device *dev, + struct device_attribute *dattr, + char *buf) +{ + struct dev_ext_attribute *ea; + + ea = container_of(dattr, struct dev_ext_attribute, attr); + return scnprintf(buf, PAGE_SIZE, "configid=0x%lx\n", (unsigned long)(ea->var)); +} + +int etm_perf_add_symlink_cscfg(struct device *dev, struct cscfg_config_desc *config_desc) +{ + int err = 0; + + if (config_desc->event_ea != NULL) + return 0; + + config_desc->event_ea = etm_perf_add_symlink_group(dev, config_desc->name, "events"); + + /* set the show function to the custom cscfg event */ + if (!IS_ERR(config_desc->event_ea)) + config_desc->event_ea->attr.show = etm_perf_cscfg_event_show; + else { + err = PTR_ERR(config_desc->event_ea); + config_desc->event_ea = NULL; + } + + return err; +} + +void etm_perf_del_symlink_cscfg(struct cscfg_config_desc *config_desc) +{ + if (!config_desc->event_ea) + return; + + etm_perf_del_symlink_group(config_desc->event_ea, "events"); + config_desc->event_ea = NULL; +} + int __init etm_perf_init(void) { int ret; diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.h b/drivers/hwtracing/coresight/coresight-etm-perf.h index 29d90dfeba31..ba617fe2217e 100644 --- a/drivers/hwtracing/coresight/coresight-etm-perf.h +++ b/drivers/hwtracing/coresight/coresight-etm-perf.h @@ -11,6 +11,7 @@ #include "coresight-priv.h" struct coresight_device; +struct cscfg_config_desc; /* * In both ETMv3 and v4 the maximum number of address comparator implentable @@ -69,6 +70,9 @@ static inline void *etm_perf_sink_config(struct perf_output_handle *handle) return data->snk_config; return NULL; } +int etm_perf_add_symlink_cscfg(struct device *dev, + struct cscfg_config_desc *config_desc); +void etm_perf_del_symlink_cscfg(struct cscfg_config_desc *config_desc); #else static inline int etm_perf_symlink(struct coresight_device *csdev, bool link) { return -EINVAL; } @@ -79,6 +83,10 @@ static inline void *etm_perf_sink_config(struct perf_output_handle *handle) { return NULL; } +int etm_perf_add_symlink_cscfg(struct device *dev, + struct cscfg_config_desc *config_desc) +{ return -EINVAL; } +void etm_perf_del_symlink_cscfg(struct cscfg_config_desc *config_desc) {} #endif /* CONFIG_CORESIGHT */ diff --git a/drivers/hwtracing/coresight/coresight-syscfg.c b/drivers/hwtracing/coresight/coresight-syscfg.c index 5e4bd86f369e..b93f2b4a777e 100644 --- a/drivers/hwtracing/coresight/coresight-syscfg.c +++ b/drivers/hwtracing/coresight/coresight-syscfg.c @@ -7,6 +7,7 @@ #include #include "coresight-config.h" +#include "coresight-etm-perf.h" #include "coresight-syscfg.h" /* @@ -275,6 +276,11 @@ static int cscfg_load_config(struct cscfg_config_desc *config_desc) if (err) return err; + /* add config to perf fs to allow selection */ + err = etm_perf_add_symlink_cscfg(cscfg_device(), config_desc); + if (err) + return err; + list_add(&config_desc->item, &cscfg_mgr->config_desc_list); return 0; } @@ -508,7 +514,12 @@ static int cscfg_create_device(void) static void cscfg_clear_device(void) { + struct cscfg_config_desc *cfg_desc; + mutex_lock(&cscfg_mutex); + list_for_each_entry(cfg_desc, &cscfg_mgr->config_desc_list, item) { + etm_perf_del_symlink_cscfg(cfg_desc); + } device_unregister(cscfg_device()); mutex_unlock(&cscfg_mutex); }