diff options
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-etm-perf.c')
-rw-r--r-- | drivers/hwtracing/coresight/coresight-etm-perf.c | 150 |
1 files changed, 120 insertions, 30 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c index 6f398377fec9..8ebd728d3a80 100644 --- a/drivers/hwtracing/coresight/coresight-etm-perf.c +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c @@ -18,8 +18,10 @@ #include <linux/types.h> #include <linux/workqueue.h> +#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, }; @@ -196,6 +215,10 @@ static void free_event_data(struct work_struct *work) /* Free the sink buffers, if there are any */ free_sink_buffer(event_data); + /* clear any configuration we were using */ + if (event_data->cfg_hash) + cscfg_deactivate_config(event_data->cfg_hash); + for_each_cpu(cpu, mask) { struct list_head **ppath; @@ -273,7 +296,7 @@ static bool sinks_compatible(struct coresight_device *a, static void *etm_setup_aux(struct perf_event *event, void **pages, int nr_pages, bool overwrite) { - u32 id; + u32 id, cfg_hash; int cpu = event->cpu; cpumask_t *mask; struct coresight_device *sink = NULL; @@ -286,11 +309,19 @@ 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); } + /* check if user wants a coresight configuration selected */ + cfg_hash = (u32)((event->attr.config2 & GENMASK_ULL(63, 32)) >> 32); + if (cfg_hash) { + if (cscfg_activate_config(cfg_hash)) + goto err; + event_data->cfg_hash = cfg_hash; + } + mask = &event_data->mask; /* @@ -658,68 +689,127 @@ 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; @@ -748,7 +838,7 @@ int __init etm_perf_init(void) return ret; } -void __exit etm_perf_exit(void) +void etm_perf_exit(void) { perf_pmu_unregister(&etm_pmu); } |