CoreSight October 2024

coresight@lists.linaro.org

13 participants
31 discussions

[PATCH] coresight: Fixes device's owner field for registered using coresight_init_driver()

by Junhao He

The coresight_init_driver() of the coresight-core module is called from the sub coresgiht device (such as tmc/stm/funnle/...) module. It calls amba_driver_register() and Platform_driver_register(), which are macro functions that use the coresight-core's module to initialize the caller's owner field. Therefore, when the sub coresight device calls coresight_init_driver(), an incorrect THIS_MODULE value is captured. The sub coesgiht modules can be removed while their callbacks are running, resulting in a general protection failure. Add module parameter to coresight_init_driver() so can be called with the module of the callback. Fixes: 075b7cd7ad7d ("coresight: Add helpers registering/removing both AMBA and platform drivers") Signed-off-by: Junhao He <hejunhao3(a)huawei.com> --- drivers/hwtracing/coresight/coresight-catu.c | 2 +- drivers/hwtracing/coresight/coresight-core.c | 6 +++--- drivers/hwtracing/coresight/coresight-cpu-debug.c | 3 ++- drivers/hwtracing/coresight/coresight-funnel.c | 3 ++- drivers/hwtracing/coresight/coresight-replicator.c | 3 ++- drivers/hwtracing/coresight/coresight-stm.c | 2 +- drivers/hwtracing/coresight/coresight-tmc-core.c | 2 +- drivers/hwtracing/coresight/coresight-tpiu.c | 2 +- include/linux/coresight.h | 2 +- 9 files changed, 14 insertions(+), 11 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c index bfea880d6dfb..337668f9cfd4 100644 --- a/drivers/hwtracing/coresight/coresight-catu.c +++ b/drivers/hwtracing/coresight/coresight-catu.c @@ -702,7 +702,7 @@ static int __init catu_init(void) { int ret; - ret = coresight_init_driver("catu", &catu_driver, &catu_platform_driver); + ret = coresight_init_driver("catu", &catu_driver, &catu_platform_driver, THIS_MODULE); tmc_etr_set_catu_ops(&etr_catu_buf_ops); return ret; } diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index 9fc6f6b863e0..c546a417836c 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -1399,17 +1399,17 @@ module_init(coresight_init); module_exit(coresight_exit); int coresight_init_driver(const char *drv, struct amba_driver *amba_drv, - struct platform_driver *pdev_drv) + struct platform_driver *pdev_drv, struct module *owner) { int ret; - ret = amba_driver_register(amba_drv); + ret = __amba_driver_register(amba_drv, owner); if (ret) { pr_err("%s: error registering AMBA driver\n", drv); return ret; } - ret = platform_driver_register(pdev_drv); + ret = __platform_driver_register(pdev_drv, owner); if (!ret) return 0; diff --git a/drivers/hwtracing/coresight/coresight-cpu-debug.c b/drivers/hwtracing/coresight/coresight-cpu-debug.c index 75962dae9aa1..cc599c5ef4b2 100644 --- a/drivers/hwtracing/coresight/coresight-cpu-debug.c +++ b/drivers/hwtracing/coresight/coresight-cpu-debug.c @@ -774,7 +774,8 @@ static struct platform_driver debug_platform_driver = { static int __init debug_init(void) { - return coresight_init_driver("debug", &debug_driver, &debug_platform_driver); + return coresight_init_driver("debug", &debug_driver, &debug_platform_driver, + THIS_MODULE); } static void __exit debug_exit(void) diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c index 5a819c8970fb..8f451b051ddc 100644 --- a/drivers/hwtracing/coresight/coresight-funnel.c +++ b/drivers/hwtracing/coresight/coresight-funnel.c @@ -433,7 +433,8 @@ static struct amba_driver dynamic_funnel_driver = { static int __init funnel_init(void) { - return coresight_init_driver("funnel", &dynamic_funnel_driver, &funnel_driver); + return coresight_init_driver("funnel", &dynamic_funnel_driver, &funnel_driver, + THIS_MODULE); } static void __exit funnel_exit(void) diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c index 3e55be9c8418..f7607c72857c 100644 --- a/drivers/hwtracing/coresight/coresight-replicator.c +++ b/drivers/hwtracing/coresight/coresight-replicator.c @@ -438,7 +438,8 @@ static struct amba_driver dynamic_replicator_driver = { static int __init replicator_init(void) { - return coresight_init_driver("replicator", &dynamic_replicator_driver, &replicator_driver); + return coresight_init_driver("replicator", &dynamic_replicator_driver, &replicator_driver, + THIS_MODULE); } static void __exit replicator_exit(void) diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c index 117dbb484543..403eea8f95d4 100644 --- a/drivers/hwtracing/coresight/coresight-stm.c +++ b/drivers/hwtracing/coresight/coresight-stm.c @@ -1046,7 +1046,7 @@ static struct platform_driver stm_platform_driver = { static int __init stm_init(void) { - return coresight_init_driver("stm", &stm_driver, &stm_platform_driver); + return coresight_init_driver("stm", &stm_driver, &stm_platform_driver, THIS_MODULE); } static void __exit stm_exit(void) diff --git a/drivers/hwtracing/coresight/coresight-tmc-core.c b/drivers/hwtracing/coresight/coresight-tmc-core.c index b54562f392f3..e31e36635394 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-core.c +++ b/drivers/hwtracing/coresight/coresight-tmc-core.c @@ -742,7 +742,7 @@ static struct platform_driver tmc_platform_driver = { static int __init tmc_init(void) { - return coresight_init_driver("tmc", &tmc_driver, &tmc_platform_driver); + return coresight_init_driver("tmc", &tmc_driver, &tmc_platform_driver, THIS_MODULE); } static void __exit tmc_exit(void) diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c index b048e146fbb1..f9ecd05cbe5c 100644 --- a/drivers/hwtracing/coresight/coresight-tpiu.c +++ b/drivers/hwtracing/coresight/coresight-tpiu.c @@ -318,7 +318,7 @@ static struct platform_driver tpiu_platform_driver = { static int __init tpiu_init(void) { - return coresight_init_driver("tpiu", &tpiu_driver, &tpiu_platform_driver); + return coresight_init_driver("tpiu", &tpiu_driver, &tpiu_platform_driver, THIS_MODULE); } static void __exit tpiu_exit(void) diff --git a/include/linux/coresight.h b/include/linux/coresight.h index f09ace92176e..e6c26952ddc2 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -660,7 +660,7 @@ coresight_find_output_type(struct coresight_platform_data *pdata, union coresight_dev_subtype subtype); int coresight_init_driver(const char *drv, struct amba_driver *amba_drv, - struct platform_driver *pdev_drv); + struct platform_driver *pdev_drv, struct module *owner); void coresight_remove_driver(struct amba_driver *amba_drv, struct platform_driver *pdev_drv); -- 2.33.0

3 weeks, 3 days

Re: [PATCH] coresight: configfs: Constify struct config_item_type

by James Clark

On 11/08/2024 10:30 am, Christophe JAILLET wrote: > 'struct config_item_type' is not modified in this driver. > > These structures are only used with config_group_init_type_name() which > takes a "const struct config_item_type *" as a 3rd argument or with > struct config_group.cg_item.ci_type which is also a "const struct > config_item_type *". > > Constifying this structure moves some data to a read-only section, so > increase overall security, especially when the structure holds some > function pointers. > > On a x86_64, with allmodconfig: > Before: > ====== > text data bss dec hex filename > 4904 1376 136 6416 1910 drivers/hwtracing/coresight/coresight-syscfg-configfs.o > > After: > ===== > text data bss dec hex filename > 5264 1120 16 6400 1900 drivers/hwtracing/coresight/coresight-syscfg-configfs.o > > Signed-off-by: Christophe JAILLET <christophe.jaillet(a)wanadoo.fr> > --- > Compile tested-only. > --- > .../hwtracing/coresight/coresight-syscfg-configfs.c | 12 ++++++------ > 1 file changed, 6 insertions(+), 6 deletions(-) > > diff --git a/drivers/hwtracing/coresight/coresight-syscfg-configfs.c b/drivers/hwtracing/coresight/coresight-syscfg-configfs.c > index 433ede94dd63..213b4159b062 100644 > --- a/drivers/hwtracing/coresight/coresight-syscfg-configfs.c > +++ b/drivers/hwtracing/coresight/coresight-syscfg-configfs.c > @@ -160,7 +160,7 @@ static struct configfs_attribute *cscfg_config_view_attrs[] = { > NULL, > }; > > -static struct config_item_type cscfg_config_view_type = { > +static const struct config_item_type cscfg_config_view_type = { > .ct_owner = THIS_MODULE, > .ct_attrs = cscfg_config_view_attrs, > }; > @@ -170,7 +170,7 @@ static struct configfs_attribute *cscfg_config_preset_attrs[] = { > NULL, > }; > > -static struct config_item_type cscfg_config_preset_type = { > +static const struct config_item_type cscfg_config_preset_type = { > .ct_owner = THIS_MODULE, > .ct_attrs = cscfg_config_preset_attrs, > }; > @@ -272,7 +272,7 @@ static struct configfs_attribute *cscfg_feature_view_attrs[] = { > NULL, > }; > > -static struct config_item_type cscfg_feature_view_type = { > +static const struct config_item_type cscfg_feature_view_type = { > .ct_owner = THIS_MODULE, > .ct_attrs = cscfg_feature_view_attrs, > }; > @@ -309,7 +309,7 @@ static struct configfs_attribute *cscfg_param_view_attrs[] = { > NULL, > }; > > -static struct config_item_type cscfg_param_view_type = { > +static const struct config_item_type cscfg_param_view_type = { > .ct_owner = THIS_MODULE, > .ct_attrs = cscfg_param_view_attrs, > }; > @@ -380,7 +380,7 @@ static struct config_group *cscfg_create_feature_group(struct cscfg_feature_desc > return &feat_view->group; > } > > -static struct config_item_type cscfg_configs_type = { > +static const struct config_item_type cscfg_configs_type = { > .ct_owner = THIS_MODULE, > }; > > @@ -414,7 +414,7 @@ void cscfg_configfs_del_config(struct cscfg_config_desc *config_desc) > } > } > > -static struct config_item_type cscfg_features_type = { > +static const struct config_item_type cscfg_features_type = { > .ct_owner = THIS_MODULE, > }; > Reviewed-by: James Clark <james.clark(a)linaro.org>

2 months, 1 week

[PATCH v1 0/2] Add Qualcomm extended CTI support

by Mao Jinlong

The QCOM extended CTI is a heavily parameterized version of ARM’s CSCTI. It allows a debugger to send to trigger events to a processor or to send a trigger event to one or more processors when a trigger event occurs on another processor on the same SoC, or even between SoCs. QCOM extended CTI supports up to 128 triggers. And some of the register offsets are changed. The commands to configure CTI triggers are the same as ARM's CTI. Mao Jinlong (2): dt-bindings: arm: Add Qualcomm extended CTI coresight: cti: Add Qualcomm extended CTI support .../bindings/arm/arm,coresight-cti.yaml | 14 ++ .../hwtracing/coresight/coresight-cti-core.c | 75 +++++++---- .../coresight/coresight-cti-platform.c | 16 ++- .../hwtracing/coresight/coresight-cti-sysfs.c | 124 ++++++++++++++---- drivers/hwtracing/coresight/coresight-cti.h | 123 +++++++++++------ 5 files changed, 253 insertions(+), 99 deletions(-) -- 2.41.0

5 months, 1 week

[PATCH v5 0/4] source filtering for multi-port output

by Tao Zhang

In our hardware design, by combining a funnel and a replicator, it implement a hardware device with one-to-one correspondence between output ports and input ports. The programming usage on this device is the same as funnel. The software uses a funnel and a static replicator to implement the driver of this device. Since original funnels only support a single output connection and original replicator only support a single input connection, the code needs to be modified to support this new feature. The following is a typical topology diagram of multi-port output mechanism. |----------| |---------| |----------| |---------| | TPDM 0 | | Source0 | | Source 1 | | TPDM 1 | |----------| |---------| |----------| |---------| | | | | | | | | | --------- | | | | | | | | | | | | | | | \-------------/ ---------------------- | \ Funnel 0 / | | ----------- | ------------------------------ | | | | | | \------------------/ \ Funnel 1 / ----| \--------------/ | | |----> Combine a funnel and a | | static replicator /-----------------\ | / replicator 0 \ ----| /---------------------\ | | | | | |-----------| | |---------| | | |TPDM0 |TPDM1 | \-----------------/ | \ TPDA 0 / | \-------------/ | | | | |Source0/1 | \-------------------------------/ \ Funnel 2 / \---------------------------/ Changes in V5: 1. Replace "filter-src" with "filter-source" in the dt-binding document. -- Suzuki K Poulose 2. Optimize the comments of the patch "coresight: Add support for trace filtering by source" due to bad example. -- Suzuki K Poulose 3. Correct spelling errors in the patch "coresight: Add support for trace filtering by source". -- Suzuki K Poulose 4. Optimize the function "coresight_blocks_source". -- Suzuki K Poulose 5. Add { } in the function "of_coresight_parse_endpoint". -- Suzuki K Poulose 6. Adjust the order of the patches. -- Suzuki K Poulose 7. Adjust the alignment in "coresight-platform.c". -- Suzuki K Poulose Changes in V4: 1. Use "coresight_get_source(path)" in the function "coresight_disable_path_from" instead of explicitly passing the source. -- Suzuki K Poulose 2. Optimize the order of the input parameters for "_coresight_build_path". -- Suzuki K Poulose 3. Reuse the method "coresight_block_source" in "_coresight_build_path". -- Suzuki K Poulose 4. Remove the unnecessary () in "coresight_build_path". -- Suzuki K Poulose 5. Add a helper to check if a device is SOURCE. -- Suzuki K Poulose 6. Adjust the posistion of setting "still_orphan" in "coresight_build_path". -- Suzuki K Poulose Changes in V3: 1. Rename the function "coresight_source_filter" to "coresight_block_source". And refine this function. -- Suzuki K Poulose 2. Rename the parameters of the function "coresight_find_out_connection" to avoid confusion. -- Suzuki K Poulose 3. Get the source of path in "coresight_enable_path" and "coresight_disable_path". -- Suzuki K Poulose 4. Fix filter source device before skip the port in "coresight_orphan_match". -- Suzuki K Poulose 5. Make sure the device still orphan if whter is a filter source firmware node but the filter source device is null. -- Suzuki K Poulose 6. Walk through the entire coresight bus and fixup the "filter_src_dev" if the source is being removed. -- Suzuki K Poulose 7. Refine the commit description of patch#2. -- Suzuki K Poulose 8. Fix the warning reported by kernel test robot. -- kernel test robot. 9. Use the source device directly if the port has a hardcoded filter in "tpda_get_element_size". -- Suzuki K Poulose Changes in V2: 1. Change the reference for endpoint property in dt-binding. -- Krzysztof Kozlowski 2. Change the property name "filter_src" to "filter-src". -- Krzysztof Kozlowski 3. Fix the errors in running 'make dt_binding_check'. -- Rob Herring 4. Pass in the source parameter instead of path. -- Suzuki K Poulose 5. Reset the "filter_src_dev" if the "src" csdev is being removed. -- Suzuki K Poulose 6. Add a warning if the "filter_src_dev" is of not the type DEV_TYPE_SOURCE. -- Suzuki K Poulose 7. Optimize the procedure for handling all possible cases. -- Suzuki K Poulose Changes in V1: 1. Add a static replicator connect to a funnel to implement the correspondence between the output ports and the input ports on funnels. -- Suzuki K Poulose 2. Add filter_src_dev and filter_src_dev phandle to "coresight_connection" struct, and populate them if there is one. -- Suzuki K Poulose 3. To look at the phandle and then fixup/remove the filter_src device in fixup/remove connections. -- Suzuki K Poulose 4. When TPDA reads DSB/CMB element size, it is implemented by looking up filter src device in the connections. -- Suzuki K Poulose Tao Zhang (4): dt-bindings: arm: qcom,coresight-static-replicator: Add property for source filtering coresight: Add a helper to check if a device is source coresight: Add support for trace filtering by source coresight-tpda: Optimize the function of reading element size .../arm/arm,coresight-static-replicator.yaml | 19 ++- drivers/hwtracing/coresight/coresight-core.c | 113 +++++++++++++++--- .../hwtracing/coresight/coresight-platform.c | 18 +++ drivers/hwtracing/coresight/coresight-tpda.c | 13 +- include/linux/coresight.h | 12 +- 5 files changed, 152 insertions(+), 23 deletions(-) -- 2.17.1

6 months

[PATCH v1 RESEND 0/3] Add support to configure TPDM MCMB subunit

by Mao Jinlong

Introduction of TPDM MCMB(Multi-lane Continuous Multi Bit) subunit MCMB (Multi-lane CMB) is a special form of CMB dataset type. MCMB subunit has the same number and usage of registers as CMB subunit. Just like the CMB subunit, the MCMB subunit must be configured prior to enablement. This series adds support for TPDM to configure the MCMB subunit. Once this series patches are applied properly, the new tpdm nodes for should be observed at the tpdm path /sys/bus/coresight/devices/tpdm* which supports MCMB subunit. All sysfs files of CMB subunit TPDM are included in MCMB subunit TPDM. On this basis, MCMB subunit TPDM will have new sysfs files to select and enable the lane. Mao Jinlong (1): coresight-tpdm: Add MCMB dataset support Tao Zhang (2): coresight-tpdm: Add support to select lane coresight-tpdm: Add support to enable the lane for MCMB TPDM .../testing/sysfs-bus-coresight-devices-tpdm | 15 +++ drivers/hwtracing/coresight/coresight-tpda.c | 5 +- drivers/hwtracing/coresight/coresight-tpdm.c | 121 +++++++++++++++++- drivers/hwtracing/coresight/coresight-tpdm.h | 32 ++++- 4 files changed, 164 insertions(+), 9 deletions(-) -- 2.46.0

6 months, 3 weeks

[PATCH v10 0/8] Coresight for Kernel panic and watchdog reset

by Linu Cherian

This patch series is rebased on coresight-next-v6.12. Changelog from v9: * Add common helper function of_tmc_get_reserved_resource_by_name for better code reuse * Reserved buffer validity and crashdata validity has been separated to avoid interdependence * New fields added to crash metadata: version, ffcr, ffsr, mode * Version checks added for metadata validation * Special file /dev/crash_tmc_xxx would be available only when crash metadata is valid * Removed READ_CRASHDATA mode meant for special casing crashdata reads. Instead, dedicated read function added for crashdata reads from reserved buffer which is common for both ETR and ETF sinks as well. * Documentation added to Documentation/tracing/coresight/panic.rst Changelog from v8: * Added missing exit path on error in __tmc_probe. * Few whitespace fixes, checkpatch fixes. * With perf sessions honouring stop_on_flush sysfs attribute, removed redundant variable stop_on_flush_en. Changelog from v7: * Fixed breakage on perf test -vvvv "arm coresight". No issues seen with and without "resrv" buffer mode * Moved the crashdev registration into a separate function. * Removed redundant variable in tmc_etr_setup_crashdata_buf * Avoided a redundant memcpy in tmc_panic_sync_etf. * Tested kernel panic with trace session started uisng perf. Please see the title "Perf based testing" below for details. For this, stop_on_flush sysfs attribute is taken into consideration while starting perf sessions as well. Changelog from v6: * Added special device files for reading crashdata, so that read_prevboot mode flag is removed. * Added new sysfs TMC device attribute, stop_on_flush. Stop on flush trigger event is disabled by default. User need to explicitly enable this from sysfs for panic stop to work. * Address parameter for panicstop ETM configuration is chosen as kernel "panic" address by default. * Added missing tmc_wait_for_tmcready during panic handling * Few other misc code rearrangements. Changelog from v5: * Fixed issues reported by CONFIG_DEBUG_ATOMIC_SLEEP * Fixed a memory leak while reading data from /dev/tmc_etrx in READ_PREVBOOT mode * Tested reading trace data from crashdump kernel Changelog from v4: * Device tree binding - Description is made more explicit on the usage of reserved memory region - Mismatch in memory region names in dts binding and driver fixed - Removed "mem" suffix from the memory region names * Rename "struct tmc_register_snapshot" -> "struct tmc_crash_metadata", since it contains more than register snapshot. Related variables are named accordingly. * Rename struct tmc_drvdata members resrv_buf -> crash_tbuf metadata -> crash_mdata * Size field in metadata refers to RSZ register and hence indicates the size in 32 bit words. ETR metadata follows this convention, the same has been extended to ETF metadata as well. * Added crc32 for more robust metadata and tracedata validation. * Added/modified dev_dbg messages during metadata validation * Fixed a typo in patch 5 commit description Changelog from v3: * Converted the Coresight ETM driver change to a named configuration. RFC tag has been removed with this change. * Fixed yaml issues reported by "make dt_binding_check" * Added names for reserved memory regions 0 and 1 * Added prevalidation checks for metadata processing * Fixed a regression introduced in RFC v3 - TMC Status register was getting saved wrongly * Reverted memremap attribute changes from _WB to _WC to match with the dma map attributes * Introduced reserved buffer mode specific .sync op. This fixes a possible crash when reserved buffer mode was used in normal trace capture, due to unwanted dma maintenance operations. *** SUBJECT HERE *** *** BLURB HERE *** Linu Cherian (8): dt-bindings: arm: coresight-tmc: Add "memory-region" property coresight: tmc-etr: Add support to use reserved trace memory coresight: core: Add provision for panic callbacks coresight: tmc: Enable panic sync handling coresight: tmc: Add support for reading crash data coresight: tmc: Stop trace capture on FlIn coresight: config: Add preloaded configuration Documentation: coresight: Panic support .../bindings/arm/arm,coresight-tmc.yaml | 26 ++ Documentation/trace/coresight/panic.rst | 356 ++++++++++++++++++ drivers/hwtracing/coresight/Makefile | 2 +- .../coresight/coresight-cfg-preload.c | 2 + .../coresight/coresight-cfg-preload.h | 2 + .../hwtracing/coresight/coresight-cfg-pstop.c | 83 ++++ drivers/hwtracing/coresight/coresight-core.c | 42 +++ .../hwtracing/coresight/coresight-tmc-core.c | 296 ++++++++++++++- .../hwtracing/coresight/coresight-tmc-etf.c | 124 +++++- .../hwtracing/coresight/coresight-tmc-etr.c | 231 +++++++++++- drivers/hwtracing/coresight/coresight-tmc.h | 106 ++++++ include/linux/coresight.h | 24 ++ 12 files changed, 1282 insertions(+), 12 deletions(-) create mode 100644 Documentation/trace/coresight/panic.rst create mode 100644 drivers/hwtracing/coresight/coresight-cfg-pstop.c -- 2.34.1

6 months, 3 weeks

[PATCH v4 0/4] source filtering for multi-port output

by Tao Zhang

In our hardware design, by combining a funnel and a replicator, it implement a hardware device with one-to-one correspondence between output ports and input ports. The programming usage on this device is the same as funnel. The software uses a funnel and a static replicator to implement the driver of this device. Since original funnels only support a single output connection and original replicator only support a single input connection, the code needs to be modified to support this new feature. The following is a typical topology diagram of multi-port output mechanism. |----------| |---------| |----------| |---------| | TPDM 0 | | Source0 | | Source 1 | | TPDM 1 | |----------| |---------| |----------| |---------| | | | | | | | | | --------- | | | | | | | | | | | | | | | \-------------/ ---------------------- | \ Funnel 0 / | | ----------- | ------------------------------ | | | | | | \------------------/ \ Funnel 1 / ----| \--------------/ | | |----> Combine a funnel and a | | static replicator /-----------------\ | / replicator 0 \ ----| /---------------------\ | | | | | |-----------| | |---------| | | |TPDM0 |TPDM1 | \-----------------/ | \ TPDA 0 / | \-------------/ | | | | |Source0/1 | \-------------------------------/ \ Funnel 2 / \---------------------------/ Changes in V4: 1. Use "coresight_get_source(path)" in the function "coresight_disable_path_from" instead of explicitly passing the source. -- Suzuki K Poulose 2. Optimize the order of the input parameters for "_coresight_build_path". -- Suzuki K Poulose 3. Reuse the method "coresight_block_source" in "_coresight_build_path". -- Suzuki K Poulose 4. Remove the unnecessary () in "coresight_build_path". -- Suzuki K Poulose 5. Add a helper to check if a device is SOURCE. -- Suzuki K Poulose 6. Adjust the posistion of setting "still_orphan" in "coresight_build_path". -- Suzuki K Poulose Changes in V3: 1. Rename the function "coresight_source_filter" to "coresight_block_source". And refine this function. -- Suzuki K Poulose 2. Rename the parameters of the function "coresight_find_out_connection" to avoid confusion. -- Suzuki K Poulose 3. Get the source of path in "coresight_enable_path" and "coresight_disable_path". -- Suzuki K Poulose 4. Fix filter source device before skip the port in "coresight_orphan_match". -- Suzuki K Poulose 5. Make sure the device still orphan if whter is a filter source firmware node but the filter source device is null. -- Suzuki K Poulose 6. Walk through the entire coresight bus and fixup the "filter_src_dev" if the source is being removed. -- Suzuki K Poulose 7. Refine the commit description of patch#2. -- Suzuki K Poulose 8. Fix the warning reported by kernel test robot. -- kernel test robot. 9. Use the source device directly if the port has a hardcoded filter in "tpda_get_element_size". -- Suzuki K Poulose Changes in V2: 1. Change the reference for endpoint property in dt-binding. -- Krzysztof Kozlowski 2. Change the property name "filter_src" to "filter-src". -- Krzysztof Kozlowski 3. Fix the errors in running 'make dt_binding_check'. -- Rob Herring 4. Pass in the source parameter instead of path. -- Suzuki K Poulose 5. Reset the "filter_src_dev" if the "src" csdev is being removed. -- Suzuki K Poulose 6. Add a warning if the "filter_src_dev" is of not the type DEV_TYPE_SOURCE. -- Suzuki K Poulose 7. Optimize the procedure for handling all possible cases. -- Suzuki K Poulose Changes in V1: 1. Add a static replicator connect to a funnel to implement the correspondence between the output ports and the input ports on funnels. -- Suzuki K Poulose 2. Add filter_src_dev and filter_src_dev phandle to "coresight_connection" struct, and populate them if there is one. -- Suzuki K Poulose 3. To look at the phandle and then fixup/remove the filter_src device in fixup/remove connections. -- Suzuki K Poulose 4. When TPDA reads DSB/CMB element size, it is implemented by looking up filter src device in the connections. -- Suzuki K Poulose Tao Zhang (4): dt-bindings: arm: qcom,coresight-static-replicator: Add property for source filtering coresight: Add support for trace filtering by source coresight: Add a helper to check if a device is source coresight-tpda: Optimize the function of reading element size .../arm/arm,coresight-static-replicator.yaml | 19 ++- drivers/hwtracing/coresight/coresight-core.c | 116 +++++++++++++++--- .../hwtracing/coresight/coresight-platform.c | 18 +++ drivers/hwtracing/coresight/coresight-tpda.c | 13 +- include/linux/coresight.h | 12 +- 5 files changed, 155 insertions(+), 23 deletions(-) -- 2.17.1

7 months

[PATCH v2] coresight: etm4x: Fix PID tracing when perf is run in an init PID namespace

by Julien Meunier

The previous implementation limited the tracing capabilities when perf was run in the init PID namespace, making it impossible to trace applications in non-init PID namespaces. This update improves the tracing process by verifying the event owner. This allows us to determine whether the user has the necessary permissions to trace the application. Cc: stable(a)vger.kernel.org Fixes: aab473867fed ("coresight: etm4x: Don't trace PID for non-root PID namespace") Signed-off-by: Julien Meunier <julien.meunier(a)nokia.com> --- Changes in v2: * Update comments --- drivers/hwtracing/coresight/coresight-etm4x-core.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c index 66d44a404ad0..cf41c42399e1 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c @@ -693,9 +693,9 @@ static int etm4_parse_event_config(struct coresight_device *csdev, config->cfg |= TRCCONFIGR_TS; } - /* Only trace contextID when runs in root PID namespace */ + /* Only trace contextID when the event owner is in root PID namespace */ if ((attr->config & BIT(ETM_OPT_CTXTID)) && - task_is_in_init_pid_ns(current)) + task_is_in_init_pid_ns(event->owner)) /* bit[6], Context ID tracing bit */ config->cfg |= TRCCONFIGR_CID; @@ -709,8 +709,8 @@ static int etm4_parse_event_config(struct coresight_device *csdev, ret = -EINVAL; goto out; } - /* Only trace virtual contextID when runs in root PID namespace */ - if (task_is_in_init_pid_ns(current)) + /* Only trace virtual contextID when the event owner is in root PID namespace */ + if (task_is_in_init_pid_ns(event->owner)) config->cfg |= TRCCONFIGR_VMID | TRCCONFIGR_VMIDOPT; } -- 2.34.1

7 months

OpenCSD v1.5.5 release

by Mike Leach

Version v1.5.5 is now released. Update:- Add build support for MacOS Bugfix:- Fix object cleanup in decode tree. -- Mike Leach Principal Engineer, ARM Ltd. Manchester Design Centre. UK

7 months

Re: [PATCH v4 0/2] coresight: core: Add device name support

by Mike Leach

Hi Jinlong I was suggesting using the label property - see p44, table 4.3 of the devicetree specification. e.g. node_name@node_address { label = "text description of this device instance"; } Then use the normal of_xxxx functions to extract the string value from "label". Regards Mike On Fri, 18 Oct 2024 at 09:42, Jinlong Mao <quic_jinlmao(a)quicinc.com> wrote: > > > > On 2024/7/31 23:15, Mike Leach wrote: > > Hi, > > > > 1) As per Krzysztof comment - use the standard "label" property > > > > 2) Do not use the label string as the node name - there is no > > guarantee of uniqueness which will cause issues. Please add the label > > as a sysfs file to the standard node. > > This uses the existing standard names, allowing any scripting based on > > this to continue to work, and will not cause issues with uniqueness > > > > e.g. > > This will allow : > > > > cat cti_cpu0/label > > > > to extract the additional hardware context information that you need. > > > > Thanks > > > > Mike > > Hi Mike, > > I tried to get the label in the driver code. But I don't find any > function for it. Do you know the function to get the label of the device > tree node ? > > label: node_name@node_address > > Thanks > Jinlong Mao > > > > > > > On Wed, 3 Jul 2024 at 13:24, Mao Jinlong <quic_jinlmao(a)quicinc.com> wrote: > >> > >> With current design, the name of the non-cpu bounded coresight > >> component is the device type with the number. And with 'ls' command > >> we can get the register address of the component. But from these > >> information, we can't know what the HW or system the component belongs > >> to. Add device-name in DT to support it. > >> > >> cti_sys0 -> ../../../devices/platform/soc(a)0/138f0000.cti/cti_sys0 > >> cti_sys1 -> ../../../devices/platform/soc(a)0/13900000.cti/cti_sys1 > >> tpdm0 -> ../../../devices/platform/soc(a)0/10b0d000.tpdm/tpdm0 > >> tpdm1 -> ../../../devices/platform/soc(a)0/10c28000.tpdm/tpdm1 > >> tpdm2 -> ../../../devices/platform/soc(a)0/10c29000.tpdm/tpdm2 > >> > >> Change since V3: > >> 1. Change device-name to arm,cs-dev-name. > >> 2. Add arm,cs-dev-name to only CTI and sources' dt-binding. > >> > >> Change since V2: > >> 1. Fix the error in coresight core. > >> drivers/hwtracing/coresight/coresight-core.c:1775:7: error: assigning to 'char *' from 'const char *' discards qualifiers > >> > >> 2. Fix the warning when run dtbinding check. > >> Documentation/devicetree/bindings/arm/arm,coresight-cpu-debug.yaml: device-name: missing type definition > >> > >> Change since V1: > >> 1. Change coresight-name to device name. > >> 2. Add the device-name in coresight dt bindings. > >> > >> > >> Mao Jinlong (2): > >> coresight: core: Add device name support > >> dt-bindings: arm: Add device-name in the coresight components > >> > >> .../bindings/arm/arm,coresight-catu.yaml | 6 +++ > >> .../bindings/arm/arm,coresight-cpu-debug.yaml | 6 +++ > >> .../bindings/arm/arm,coresight-cti.yaml | 6 +++ > >> .../arm/arm,coresight-dummy-sink.yaml | 6 +++ > >> .../arm/arm,coresight-dummy-source.yaml | 6 +++ > >> .../arm/arm,coresight-dynamic-funnel.yaml | 6 +++ > >> .../arm/arm,coresight-dynamic-replicator.yaml | 6 +++ > >> .../bindings/arm/arm,coresight-etb10.yaml | 6 +++ > >> .../bindings/arm/arm,coresight-etm.yaml | 6 +++ > >> .../arm/arm,coresight-static-funnel.yaml | 6 +++ > >> .../arm/arm,coresight-static-replicator.yaml | 6 +++ > >> .../bindings/arm/arm,coresight-stm.yaml | 6 +++ > >> .../bindings/arm/arm,coresight-tmc.yaml | 6 +++ > >> .../bindings/arm/arm,coresight-tpiu.yaml | 6 +++ > >> .../bindings/arm/qcom,coresight-tpda.yaml | 6 +++ > >> .../bindings/arm/qcom,coresight-tpdm.yaml | 6 +++ > >> drivers/hwtracing/coresight/coresight-core.c | 37 ++++++++++--------- > >> .../hwtracing/coresight/coresight-platform.c | 31 ++++++++++++++++ > >> include/linux/coresight.h | 3 +- > >> 19 files changed, 149 insertions(+), 18 deletions(-) > >> > >> Mao Jinlong (2): > >> dt-bindings: arm: Add device-name in the coresight components > >> coresight: core: Add device name support > >> > >> .../bindings/arm/arm,coresight-cti.yaml | 6 +++ > >> .../arm/arm,coresight-dummy-source.yaml | 6 +++ > >> .../bindings/arm/arm,coresight-stm.yaml | 6 +++ > >> .../bindings/arm/qcom,coresight-tpdm.yaml | 6 +++ > >> drivers/hwtracing/coresight/coresight-core.c | 37 ++++++++++--------- > >> .../hwtracing/coresight/coresight-platform.c | 30 +++++++++++++++ > >> include/linux/coresight.h | 3 +- > >> 7 files changed, 76 insertions(+), 18 deletions(-) > >> > >> -- > >> 2.41.0 > >> > > > > > > -- > > Mike Leach > > Principal Engineer, ARM Ltd. > > Manchester Design Centre. UK > -- Mike Leach Principal Engineer, ARM Ltd. Manchester Design Centre. UK

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CoreSight October 2024