diff options
11 files changed, 129 insertions, 2 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-cti b/Documentation/ABI/testing/sysfs-bus-coresight-devices-cti index a97b70f588da..a2aef7f5a6d7 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-cti +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-cti @@ -239,3 +239,9 @@ Date: March 2020 KernelVersion: 5.7 Contact: Mike Leach or Mathieu Poirier Description: (Write) Clear all channel / trigger programming. + +What: /sys/bus/coresight/devices/<cti-name>/label +Date: Aug 2025 +KernelVersion 6.18 +Contact: Mao Jinlong <quic_jinlmao@quicinc.com> +Description: (Read) Show hardware context information of device. diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-dummy-source b/Documentation/ABI/testing/sysfs-bus-coresight-devices-dummy-source index 0830661ef656..321e3ee1fc9d 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-dummy-source +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-dummy-source @@ -13,3 +13,9 @@ KernelVersion: 6.14 Contact: Mao Jinlong <quic_jinlmao@quicinc.com> Description: (R) Show the trace ID that will appear in the trace stream coming from this trace entity. + +What: /sys/bus/coresight/devices/dummy_source<N>/label +Date: Aug 2025 +KernelVersion 6.18 +Contact: Mao Jinlong <quic_jinlmao@quicinc.com> +Description: (Read) Show hardware context information of device. diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etb10 b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etb10 index 9a383f6a74eb..f30526949687 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etb10 +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etb10 @@ -19,6 +19,12 @@ Description: (RW) Disables write access to the Trace RAM by stopping the into the Trace RAM following the trigger event is equal to the value stored in this register+1 (from ARM ETB-TRM). +What: /sys/bus/coresight/devices/<memory_map>.etb/label +Date: Aug 2025 +KernelVersion 6.18 +Contact: Mao Jinlong <quic_jinlmao@quicinc.com> +Description: (Read) Show hardware context information of device. + What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/rdp Date: March 2016 KernelVersion: 4.7 diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x index 271b57c571aa..245c322c91f1 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x @@ -251,6 +251,12 @@ KernelVersion: 4.4 Contact: Mathieu Poirier <mathieu.poirier@linaro.org> Description: (RO) Holds the cpu number this tracer is affined to. +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/label +Date: Aug 2025 +KernelVersion 6.18 +Contact: Mao Jinlong <quic_jinlmao@quicinc.com> +Description: (Read) Show hardware context information of device. + What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/mgmt/etmccr Date: September 2015 KernelVersion: 4.4 diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x index a0425d70d009..6f19a6a5f2e1 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x @@ -329,6 +329,12 @@ Contact: Mathieu Poirier <mathieu.poirier@linaro.org> Description: (RW) Access the selected single show PE comparator control register. +What: /sys/bus/coresight/devices/etm<N>/label +Date: Aug 2025 +KernelVersion 6.18 +Contact: Mao Jinlong <quic_jinlmao@quicinc.com> +Description: (Read) Show hardware context information of device. + What: /sys/bus/coresight/devices/etm<N>/mgmt/trcoslsr Date: April 2015 KernelVersion: 4.01 diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-funnel b/Documentation/ABI/testing/sysfs-bus-coresight-devices-funnel index d75acda5e1b3..86938e9bbcde 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-funnel +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-funnel @@ -10,3 +10,9 @@ Date: November 2014 KernelVersion: 3.19 Contact: Mathieu Poirier <mathieu.poirier@linaro.org> Description: (RW) Defines input port priority order. + +What: /sys/bus/coresight/devices/<memory_map>.funnel/label +Date: Aug 2025 +KernelVersion 6.18 +Contact: Mao Jinlong <quic_jinlmao@quicinc.com> +Description: (Read) Show hardware context information of device. diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-stm b/Documentation/ABI/testing/sysfs-bus-coresight-devices-stm index 53e1f4815d64..848e2ffc1480 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-stm +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-stm @@ -51,3 +51,9 @@ KernelVersion: 4.7 Contact: Mathieu Poirier <mathieu.poirier@linaro.org> Description: (RW) Holds the trace ID that will appear in the trace stream coming from this trace entity. + +What: /sys/bus/coresight/devices/<memory_map>.stm/label +Date: Aug 2025 +KernelVersion 6.18 +Contact: Mao Jinlong <quic_jinlmao@quicinc.com> +Description: (Read) Show hardware context information of device. diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc index 339cec3b2f1a..55e298b9c4a4 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc @@ -107,3 +107,9 @@ Contact: Anshuman Khandual <anshuman.khandual@arm.com> Description: (RW) Current Coresight TMC-ETR buffer mode selected. But user could only provide a mode which is supported for a given ETR device. This file is available only for TMC ETR devices. + +What: /sys/bus/coresight/devices/<memory_map>.tmc/label +Date: Aug 2025 +KernelVersion 6.18 +Contact: Mao Jinlong <quic_jinlmao@quicinc.com> +Description: (Read) Show hardware context information of device. diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm index a341b08ae70b..98f1c6545027 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm @@ -272,3 +272,9 @@ KernelVersion 6.15 Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang (QUIC) <quic_taozha@quicinc.com> Description: (RW) Set/Get the enablement of the individual lane. + +What: /sys/bus/coresight/devices/<tpdm-name>/label +Date: Aug 2025 +KernelVersion 6.18 +Contact: Mao Jinlong <quic_jinlmao@quicinc.com> +Description: (Read) Show hardware context information of device. diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-trbe b/Documentation/ABI/testing/sysfs-bus-coresight-devices-trbe index ad3bbc6fa751..8a4b749ed26e 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-trbe +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-trbe @@ -12,3 +12,9 @@ Contact: Anshuman Khandual <anshuman.khandual@arm.com> Description: (Read) Shows if TRBE updates in the memory are with access and dirty flag updates as well. This value is fetched from the TRBIDR register. + +What: /sys/bus/coresight/devices/trbe<cpu>/label +Date: Aug 2025 +KernelVersion 6.18 +Contact: Mao Jinlong <quic_jinlmao@quicinc.com> +Description: (Read) Show hardware context information of device. diff --git a/drivers/hwtracing/coresight/coresight-sysfs.c b/drivers/hwtracing/coresight/coresight-sysfs.c index feadaf065b53..5e52324aa9ac 100644 --- a/drivers/hwtracing/coresight/coresight-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-sysfs.c @@ -7,6 +7,7 @@ #include <linux/device.h> #include <linux/idr.h> #include <linux/kernel.h> +#include <linux/property.h> #include "coresight-priv.h" #include "coresight-trace-id.h" @@ -371,17 +372,81 @@ static ssize_t enable_source_store(struct device *dev, } static DEVICE_ATTR_RW(enable_source); +static ssize_t label_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + + const char *str; + int ret; + + ret = fwnode_property_read_string(dev_fwnode(dev), "label", &str); + if (ret == 0) + return sysfs_emit(buf, "%s\n", str); + else + return ret; +} +static DEVICE_ATTR_RO(label); + +static umode_t label_is_visible(struct kobject *kobj, + struct attribute *attr, int n) +{ + struct device *dev = kobj_to_dev(kobj); + + if (attr == &dev_attr_label.attr) { + if (fwnode_property_present(dev_fwnode(dev), "label")) + return attr->mode; + else + return 0; + } + + return attr->mode; +} + static struct attribute *coresight_sink_attrs[] = { &dev_attr_enable_sink.attr, + &dev_attr_label.attr, NULL, }; -ATTRIBUTE_GROUPS(coresight_sink); + +static struct attribute_group coresight_sink_group = { + .attrs = coresight_sink_attrs, + .is_visible = label_is_visible, +}; +__ATTRIBUTE_GROUPS(coresight_sink); static struct attribute *coresight_source_attrs[] = { &dev_attr_enable_source.attr, + &dev_attr_label.attr, NULL, }; -ATTRIBUTE_GROUPS(coresight_source); + +static struct attribute_group coresight_source_group = { + .attrs = coresight_source_attrs, + .is_visible = label_is_visible, +}; +__ATTRIBUTE_GROUPS(coresight_source); + +static struct attribute *coresight_link_attrs[] = { + &dev_attr_label.attr, + NULL, +}; + +static struct attribute_group coresight_link_group = { + .attrs = coresight_link_attrs, + .is_visible = label_is_visible, +}; +__ATTRIBUTE_GROUPS(coresight_link); + +static struct attribute *coresight_helper_attrs[] = { + &dev_attr_label.attr, + NULL, +}; + +static struct attribute_group coresight_helper_group = { + .attrs = coresight_helper_attrs, + .is_visible = label_is_visible, +}; +__ATTRIBUTE_GROUPS(coresight_helper); const struct device_type coresight_dev_type[] = { [CORESIGHT_DEV_TYPE_SINK] = { @@ -390,6 +455,7 @@ const struct device_type coresight_dev_type[] = { }, [CORESIGHT_DEV_TYPE_LINK] = { .name = "link", + .groups = coresight_link_groups, }, [CORESIGHT_DEV_TYPE_LINKSINK] = { .name = "linksink", @@ -401,6 +467,7 @@ const struct device_type coresight_dev_type[] = { }, [CORESIGHT_DEV_TYPE_HELPER] = { .name = "helper", + .groups = coresight_helper_groups, } }; /* Ensure the enum matches the names and groups */ |