From patchwork Wed Apr 22 22:40:44 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Poirier X-Patchwork-Id: 6258851 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id E25D2BF4A6 for ; Wed, 22 Apr 2015 22:44:20 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EE27F20377 for ; Wed, 22 Apr 2015 22:44:19 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DBBEF20383 for ; Wed, 22 Apr 2015 22:44:18 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Yl3LO-0001GM-AH; Wed, 22 Apr 2015 22:42:10 +0000 Received: from mail-pd0-f173.google.com ([209.85.192.173]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Yl3Ko-00014G-IQ for linux-arm-kernel@lists.infradead.org; Wed, 22 Apr 2015 22:41:39 +0000 Received: by pdbqa5 with SMTP id qa5so809786pdb.1 for ; Wed, 22 Apr 2015 15:41:15 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=4g2QqMHojGptS8xXtK7pXWs3S4NZF6vynmmyzQ7hoL4=; b=WDrHDML2T14vIn0Ulf5fhcaC+SSjj1oCbCdKJcMjlFBQmdmRMh8SgxDoV+ortd0EAG X4bD70NVskFmDlwbBNn724cCUoSoUXzevppDkJ34SUnXeIuvGcosYk+Jm9QlLOHSZ9q6 gw8Od1jU9FSP0g1L9/53T/Y4uS1R0P5qbIg+bfPR1Fmc8bUxDovTi6VtwJ4K09lxBomj DJT/r8rGev8Wric9UNMYEfMmkkHB5bf6blS1IXNM+fo1ivjzK3SQ+hlRrsIRL9Ndgl8+ 3lUv1VXeoz4xoSq0Dgt6P969SNDTsko6mK+WfdHVTGS1o1PXGxSmWtPjaXDc+W5qFK4I UTuw== X-Gm-Message-State: ALoCoQk+vIBfTGlWkp/WRZi6QHHCra2sp0OGYDma5FtPRb9qoFjok2IfIMajs1QoJpup98ZkMwqT X-Received: by 10.70.128.36 with SMTP id nl4mr51423083pdb.43.1429742475134; Wed, 22 Apr 2015 15:41:15 -0700 (PDT) Received: from t430.cg.shawcable.net ([184.64.168.246]) by mx.google.com with ESMTPSA id f1sm6074250pds.62.2015.04.22.15.41.13 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 22 Apr 2015 15:41:14 -0700 (PDT) From: Mathieu Poirier To: gregkh@linuxfoundation.org Subject: [PATCH 04/11] coresight-etm4x: Controls pertaining to various configuration options Date: Wed, 22 Apr 2015 16:40:44 -0600 Message-Id: <1429742451-11465-5-git-send-email-mathieu.poirier@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1429742451-11465-1-git-send-email-mathieu.poirier@linaro.org> References: <1429742451-11465-1-git-send-email-mathieu.poirier@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150422_154134_718017_3BB4ECD2 X-CRM114-Status: GOOD ( 12.54 ) X-Spam-Score: -1.0 (-) Cc: mathieu.poirier@linaro.org, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, zhang.chunyan@linaro.org, linux-arm-kernel@lists.infradead.org, kaixu.xia@linaro.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pratik Patel Adding sysfs entries to configure: . global timestamp. . how often trace synchronisation occur. . the threashold value for cycle counting. . branch and broadcasting regions. Signed-off-by: Pratik Patel Signed-off-by: Mathieu Poirier --- .../ABI/testing/sysfs-bus-coresight-devices-etm4x | 28 ++++- drivers/hwtracing/coresight/coresight-etm4x.c | 124 +++++++++++++++++++++ 2 files changed, 151 insertions(+), 1 deletion(-) diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x index 9caf70382088..2aeae2976c10 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x @@ -119,4 +119,30 @@ What: /sys/bus/coresight/devices/.etm/event_instren Date: April 2015 KernelVersion: 4.01 Contact: Mathieu Poirier -Description: (RW) Controls the behavior of the events in bank 0 to 3. +Description: (RW) Controls the behavior of the events in bank 0 to 3 + +What: /sys/bus/coresight/devices/.etm/event_ts +Date: April 2015 +KernelVersion: 4.01 +Contact: Mathieu Poirier +Description: (RW) Controls the insertion of global timestamps in the trace + streams. + +What: /sys/bus/coresight/devices/.etm/syncfreq +Date: April 2015 +KernelVersion: 4.01 +Contact: Mathieu Poirier +Description: (RW) Controls how often trace synchronization requests occur. + +What: /sys/bus/coresight/devices/.etm/cyc_threshold +Date: April 2015 +KernelVersion: 4.01 +Contact: Mathieu Poirier +Description: (RW) Sets the threshold value for cycle counting. + +What: /sys/bus/coresight/devices/.etm/bb_ctrl +Date: April 2015 +KernelVersion: 4.01 +Contact: Mathieu Poirier +Description: (RW) Controls which regions in the memory map are enabled to + use branch broadcasting. diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c index 73408c296699..dfe6a4cad43c 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.c +++ b/drivers/hwtracing/coresight/coresight-etm4x.c @@ -812,6 +812,126 @@ static ssize_t event_instren_store(struct device *dev, } static DEVICE_ATTR_RW(event_instren); +static ssize_t event_ts_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + val = drvdata->ts_ctrl; + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t event_ts_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + if (!drvdata->ts_size) + return -EINVAL; + + drvdata->ts_ctrl = val & ETMv4_EVENT_MASK; + return size; +} +static DEVICE_ATTR_RW(event_ts); + +static ssize_t syncfreq_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + val = drvdata->syncfreq; + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t syncfreq_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + if (drvdata->syncpr == true) + return -EINVAL; + + drvdata->syncfreq = val & ETMv4_SYNC_MASK; + return size; +} +static DEVICE_ATTR_RW(syncfreq); + +static ssize_t cyc_threshold_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + val = drvdata->ccctlr; + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t cyc_threshold_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + if (val < drvdata->ccitmin) + return -EINVAL; + + drvdata->ccctlr = val & ETM_CYC_THRESHOLD_MASK; + return size; +} +static DEVICE_ATTR_RW(cyc_threshold); + +static ssize_t bb_ctrl_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + val = drvdata->bb_ctrl; + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t bb_ctrl_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + if (drvdata->trcbb == false) + return -EINVAL; + if (!drvdata->nr_addr_cmp) + return -EINVAL; + /* + * Bit[7:0] selects which address range comparator is used for + * branch broadcast control. + */ + if (BMVAL(val, 0, 7) > drvdata->nr_addr_cmp) + return -EINVAL; + + drvdata->bb_ctrl = val; + return size; +} +static DEVICE_ATTR_RW(bb_ctrl); + static ssize_t status_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -969,6 +1089,10 @@ static struct attribute *coresight_etmv4_attrs[] = { &dev_attr_pe.attr, &dev_attr_event.attr, &dev_attr_event_instren.attr, + &dev_attr_event_ts.attr, + &dev_attr_syncfreq.attr, + &dev_attr_cyc_threshold.attr, + &dev_attr_bb_ctrl.attr, &dev_attr_status.attr, &dev_attr_mgmt.attr, &dev_attr_trcidr.attr,