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[209.132.180.67]) by mx.google.com with ESMTP id ql2si40239361pbc.204.2015.04.29.10.19.06; Wed, 29 Apr 2015 10:19:07 -0700 (PDT) Received-SPF: none (google.com: linux-kernel-owner@vger.kernel.org does not designate permitted sender hosts) client-ip=209.132.180.67; Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966441AbbD2RTB (ORCPT + 28 others); Wed, 29 Apr 2015 13:19:01 -0400 Received: from mail-pd0-f173.google.com ([209.85.192.173]:35530 "EHLO mail-pd0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966409AbbD2RQ5 (ORCPT ); Wed, 29 Apr 2015 13:16:57 -0400 Received: by pdbqd1 with SMTP id qd1so33944862pdb.2 for ; Wed, 29 Apr 2015 10:16:56 -0700 (PDT) X-Received: by 10.70.32.164 with SMTP id k4mr206485pdi.138.1430327816723; Wed, 29 Apr 2015 10:16:56 -0700 (PDT) Received: from t430.cg.shawcable.net ([184.64.168.246]) by mx.google.com with ESMTPSA id ol3sm17067460pbb.70.2015.04.29.10.16.55 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 29 Apr 2015 10:16:56 -0700 (PDT) From: Mathieu Poirier To: gregkh@linuxfoundation.org Cc: linux-arm-kernel@lists.infradead.org, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, kaixu.xia@linaro.org, zhang.chunyan@linaro.org, mathieu.poirier@linaro.org Subject: [PATCH v2 06/11] coresight-etm4x: Controls pertaining to the address comparator functions Date: Wed, 29 Apr 2015 11:16:30 -0600 Message-Id: <1430327795-10710-7-git-send-email-mathieu.poirier@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1430327795-10710-1-git-send-email-mathieu.poirier@linaro.org> References: <1430327795-10710-1-git-send-email-mathieu.poirier@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: list List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: mathieu.poirier@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.217.181 as permitted sender) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , From: Pratik Patel Adding sysfs entries to control the various mode the address comparator registers can enact, i.e, start/top, single, and range. Also supplementing with address comparator types configuration registers access, mandatory to complete the configuration of the comparator functions. Signed-off-by: Pratik Patel Signed-off-by: Mathieu Poirier --- .../ABI/testing/sysfs-bus-coresight-devices-etm4x | 25 ++ drivers/hwtracing/coresight/coresight-etm4x.c | 423 +++++++++++++++++++++ 2 files changed, 448 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x index d7409c3d58e6..8cdc4ad10bd6 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x @@ -166,3 +166,28 @@ KernelVersion: 4.01 Contact: Mathieu Poirier Description: (RW) In non-secure state, each bit controls whether instruction tracing is enabled for the corresponding exception level. + +What: /sys/bus/coresight/devices/.etm/addr_idx +Date: April 2015 +KernelVersion: 4.01 +Contact: Mathieu Poirier +Description: (RW) Select which address comparator or pair (of comparators) to + work with. + +What: /sys/bus/coresight/devices/.etm/addr_instdatatype +Date: April 2015 +KernelVersion: 4.01 +Contact: Mathieu Poirier +Description: (RW) Controls what type of comparison the trace unit performs. + +What: /sys/bus/coresight/devices/.etm/addr_single +Date: April 2015 +KernelVersion: 4.01 +Contact: Mathieu Poirier +Description: (RW) Used to setup single address comparator values. + +What: /sys/bus/coresight/devices/.etm/addr_range +Date: April 2015 +KernelVersion: 4.01 +Contact: Mathieu Poirier +Description: (RW) Used to setup address range comparator values. diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c index 9f2a13dd1280..47cc68b8cc43 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.c +++ b/drivers/hwtracing/coresight/coresight-etm4x.c @@ -1027,6 +1027,421 @@ static ssize_t ns_exlevel_vinst_store(struct device *dev, } static DEVICE_ATTR_RW(ns_exlevel_vinst); +static ssize_t addr_idx_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + val = drvdata->addr_idx; + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t addr_idx_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->nr_addr_cmp * 2) + return -EINVAL; + + /* + * Use spinlock to ensure index doesn't change while it gets + * dereferenced multiple times within a spinlock block elsewhere. + */ + spin_lock(&drvdata->spinlock); + drvdata->addr_idx = val; + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(addr_idx); + +static ssize_t addr_instdatatype_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + ssize_t len; + u8 val, idx; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + spin_lock(&drvdata->spinlock); + idx = drvdata->addr_idx; + val = BMVAL(drvdata->addr_acc[idx], 0, 1); + len = scnprintf(buf, PAGE_SIZE, "%s\n", + val == ETM_INSTR_ADDR ? "instr" : + (val == ETM_DATA_LOAD_ADDR ? "data_load" : + (val == ETM_DATA_STORE_ADDR ? "data_store" : + "data_load_store"))); + spin_unlock(&drvdata->spinlock); + return len; +} + +static ssize_t addr_instdatatype_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + u8 idx; + char str[20] = ""; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (strlen(buf) >= 20) + return -EINVAL; + if (sscanf(buf, "%s", str) != 1) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + idx = drvdata->addr_idx; + if (!strcmp(str, "instr")) + /* TYPE, bits[1:0] */ + drvdata->addr_acc[idx] &= ~(BIT(0) | BIT(1)); + + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(addr_instdatatype); + +static ssize_t addr_single_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + idx = drvdata->addr_idx; + spin_lock(&drvdata->spinlock); + if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || + drvdata->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) { + spin_unlock(&drvdata->spinlock); + return -EPERM; + } + val = (unsigned long)drvdata->addr_val[idx]; + spin_unlock(&drvdata->spinlock); + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t addr_single_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + idx = drvdata->addr_idx; + if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || + drvdata->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) { + spin_unlock(&drvdata->spinlock); + return -EPERM; + } + + drvdata->addr_val[idx] = (u64)val; + drvdata->addr_type[idx] = ETM_ADDR_TYPE_SINGLE; + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(addr_single); + +static ssize_t addr_range_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + u8 idx; + unsigned long val1, val2; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + spin_lock(&drvdata->spinlock); + idx = drvdata->addr_idx; + if (idx % 2 != 0) { + spin_unlock(&drvdata->spinlock); + return -EPERM; + } + if (!((drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE && + drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) || + (drvdata->addr_type[idx] == ETM_ADDR_TYPE_RANGE && + drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) { + spin_unlock(&drvdata->spinlock); + return -EPERM; + } + + val1 = (unsigned long)drvdata->addr_val[idx]; + val2 = (unsigned long)drvdata->addr_val[idx + 1]; + spin_unlock(&drvdata->spinlock); + return scnprintf(buf, PAGE_SIZE, "%#lx %#lx\n", val1, val2); +} + +static ssize_t addr_range_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + u8 idx; + unsigned long val1, val2; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (sscanf(buf, "%lx %lx", &val1, &val2) != 2) + return -EINVAL; + /* lower address comparator cannot have a higher address value */ + if (val1 > val2) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + idx = drvdata->addr_idx; + if (idx % 2 != 0) { + spin_unlock(&drvdata->spinlock); + return -EPERM; + } + + if (!((drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE && + drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) || + (drvdata->addr_type[idx] == ETM_ADDR_TYPE_RANGE && + drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) { + spin_unlock(&drvdata->spinlock); + return -EPERM; + } + + drvdata->addr_val[idx] = (u64)val1; + drvdata->addr_type[idx] = ETM_ADDR_TYPE_RANGE; + drvdata->addr_val[idx + 1] = (u64)val2; + drvdata->addr_type[idx + 1] = ETM_ADDR_TYPE_RANGE; + /* + * Program include or exclude control bits for vinst or vdata + * whenever we change addr comparators to ETM_ADDR_TYPE_RANGE + */ + if (drvdata->mode & ETM_MODE_EXCLUDE) + etm4_set_mode_exclude(drvdata, true); + else + etm4_set_mode_exclude(drvdata, false); + + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(addr_range); + +static ssize_t addr_start_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + spin_lock(&drvdata->spinlock); + idx = drvdata->addr_idx; + + if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || + drvdata->addr_type[idx] == ETM_ADDR_TYPE_START)) { + spin_unlock(&drvdata->spinlock); + return -EPERM; + } + + val = (unsigned long)drvdata->addr_val[idx]; + spin_unlock(&drvdata->spinlock); + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t addr_start_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + idx = drvdata->addr_idx; + if (!drvdata->nr_addr_cmp) { + spin_unlock(&drvdata->spinlock); + return -EINVAL; + } + if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || + drvdata->addr_type[idx] == ETM_ADDR_TYPE_START)) { + spin_unlock(&drvdata->spinlock); + return -EPERM; + } + + drvdata->addr_val[idx] = (u64)val; + drvdata->addr_type[idx] = ETM_ADDR_TYPE_START; + drvdata->vissctlr |= BIT(idx); + /* SSSTATUS, bit[9] - turn on start/stop logic */ + drvdata->vinst_ctrl |= BIT(9); + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(addr_start); + +static ssize_t addr_stop_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + spin_lock(&drvdata->spinlock); + idx = drvdata->addr_idx; + + if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || + drvdata->addr_type[idx] == ETM_ADDR_TYPE_STOP)) { + spin_unlock(&drvdata->spinlock); + return -EPERM; + } + + val = (unsigned long)drvdata->addr_val[idx]; + spin_unlock(&drvdata->spinlock); + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t addr_stop_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + idx = drvdata->addr_idx; + if (!drvdata->nr_addr_cmp) { + spin_unlock(&drvdata->spinlock); + return -EINVAL; + } + if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || + drvdata->addr_type[idx] == ETM_ADDR_TYPE_STOP)) { + spin_unlock(&drvdata->spinlock); + return -EPERM; + } + + drvdata->addr_val[idx] = (u64)val; + drvdata->addr_type[idx] = ETM_ADDR_TYPE_STOP; + drvdata->vissctlr |= BIT(idx + 16); + /* SSSTATUS, bit[9] - turn on start/stop logic */ + drvdata->vinst_ctrl |= BIT(9); + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(addr_stop); + +static ssize_t addr_ctxtype_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + ssize_t len; + u8 idx, val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + spin_lock(&drvdata->spinlock); + idx = drvdata->addr_idx; + /* CONTEXTTYPE, bits[3:2] */ + val = BMVAL(drvdata->addr_acc[idx], 2, 3); + len = scnprintf(buf, PAGE_SIZE, "%s\n", val == ETM_CTX_NONE ? "none" : + (val == ETM_CTX_CTXID ? "ctxid" : + (val == ETM_CTX_VMID ? "vmid" : "all"))); + spin_unlock(&drvdata->spinlock); + return len; +} + +static ssize_t addr_ctxtype_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + u8 idx; + char str[10] = ""; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (strlen(buf) >= 10) + return -EINVAL; + if (sscanf(buf, "%s", str) != 1) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + idx = drvdata->addr_idx; + if (!strcmp(str, "none")) + /* start by clearing context type bits */ + drvdata->addr_acc[idx] &= ~(BIT(2) | BIT(3)); + else if (!strcmp(str, "ctxid")) { + /* 0b01 The trace unit performs a Context ID */ + if (drvdata->numcidc) { + drvdata->addr_acc[idx] |= BIT(2); + drvdata->addr_acc[idx] &= ~BIT(3); + } + } else if (!strcmp(str, "vmid")) { + /* 0b10 The trace unit performs a VMID */ + if (drvdata->numvmidc) { + drvdata->addr_acc[idx] &= ~BIT(2); + drvdata->addr_acc[idx] |= BIT(3); + } + } else if (!strcmp(str, "all")) { + /* + * 0b11 The trace unit performs a Context ID + * comparison and a VMID + */ + if (drvdata->numcidc) + drvdata->addr_acc[idx] |= BIT(2); + if (drvdata->numvmidc) + drvdata->addr_acc[idx] |= BIT(3); + } + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(addr_ctxtype); + +static ssize_t addr_context_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + spin_lock(&drvdata->spinlock); + idx = drvdata->addr_idx; + /* context ID comparator bits[6:4] */ + val = BMVAL(drvdata->addr_acc[idx], 4, 6); + spin_unlock(&drvdata->spinlock); + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t addr_context_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + if ((drvdata->numcidc <= 1) && (drvdata->numvmidc <= 1)) + return -EINVAL; + if (val >= (drvdata->numcidc >= drvdata->numvmidc ? + drvdata->numcidc : drvdata->numvmidc)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + idx = drvdata->addr_idx; + /* clear context ID comparator bits[6:4] */ + drvdata->addr_acc[idx] &= ~(BIT(4) | BIT(5) | BIT(6)); + drvdata->addr_acc[idx] |= (val << 4); + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(addr_context); + static ssize_t status_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -1191,6 +1606,14 @@ static struct attribute *coresight_etmv4_attrs[] = { &dev_attr_event_vinst.attr, &dev_attr_s_exlevel_vinst.attr, &dev_attr_ns_exlevel_vinst.attr, + &dev_attr_addr_idx.attr, + &dev_attr_addr_instdatatype.attr, + &dev_attr_addr_single.attr, + &dev_attr_addr_range.attr, + &dev_attr_addr_start.attr, + &dev_attr_addr_stop.attr, + &dev_attr_addr_ctxtype.attr, + &dev_attr_addr_context.attr, &dev_attr_status.attr, &dev_attr_mgmt.attr, &dev_attr_trcidr.attr,