CoreSight

coresight@lists.linaro.org

7 participants
2442 discussions

by Mike Leach

A branch ocsd-main-v1.6.1-rc1 has been released on the OpenCSD github site This contains a number of bugfixes for issues relating to ETMv4 ETE speculative trace. See readme for further information. This has been released to allow for testing and feedback. Known issues outstanding: a) TINFO logging has minor issue on periodic TINFO elements. b) ETMv3 / PTM regression testss failing on return stack tests. Under investigation as this code is not part of the update. -- Mike Leach Principal Engineer, ARM Ltd. Manchester Design Centre. UK

2 months

Re: [PATCH v2] coresight: fix indentation error in cscfg_remove_owned_csdev_configs()

by Leo Yan

On Wed, Jun 11, 2025 at 11:30:25AM +0100, Yeoreum Yun wrote: > Fix wrong indentation in cscfg_remove_owned_csdev_configs() > > Reported-by: kernel test robot <lkp(a)intel.com> > Closes: https://lore.kernel.org/oe-kbuild-all/202506102238.XQfScl5x-lkp@intel.com/ > Fixes: 53b9e2659719 ("coresight: holding cscfg_csdev_lock while removing cscfg from csdev") > Signed-off-by: Yeoreum Yun <yeoreum.yun(a)arm.com> Reviewed-by: Leo Yan <leo.yan(a)arm.com> > --- > > Sorry for my bad forgetting to run checkpatch.pl... > > --- > drivers/hwtracing/coresight/coresight-syscfg.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/hwtracing/coresight/coresight-syscfg.c b/drivers/hwtracing/coresight/coresight-syscfg.c > index 83dad24e0116..6836b05986e8 100644 > --- a/drivers/hwtracing/coresight/coresight-syscfg.c > +++ b/drivers/hwtracing/coresight/coresight-syscfg.c > @@ -395,7 +395,7 @@ static void cscfg_remove_owned_csdev_configs(struct coresight_device *csdev, voi > if (list_empty(&csdev->config_csdev_list)) > return; > > - guard(raw_spinlock_irqsave)(&csdev->cscfg_csdev_lock); > + guard(raw_spinlock_irqsave)(&csdev->cscfg_csdev_lock); > > list_for_each_entry_safe(config_csdev, tmp, &csdev->config_csdev_list, node) { > if (config_csdev->config_desc->load_owner == load_owner) > -- > LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7} >

2 months, 1 week

[PATCH v9 0/2] coresight: Add Coresight Trace Network On Chip driver

by Yuanfang Zhang

The Trace Network On Chip (TNOC) is an integration hierarchy which is a hardware component that integrates the functionalities of TPDA and funnels. It collects trace from subsystems and transfers it to coresight sink. In addition to the generic TNOC mentioned above, there is also a special type of TNOC called Interconnect TNOC. Unlike the generic TNOC, the Interconnect TNOC doesn't need ATID. Its primary function is to connect the source of subsystems to the Aggregator TNOC. Its driver is different from this patch and will describe it and upstream its driver separately. Signed-off-by: Yuanfang Zhang <quic_yuanfang(a)quicinc.com> --- Changes in v9: - Mention the binding is only for Aggregator TNOC. - Link to v8: https://lore.kernel.org/r/20250606-trace-noc-v8-0-833f94712c57@quicinc.com Changes in v8: - Add sysfs node to expose atid. - Link to v7: https://lore.kernel.org/r/20250523-trace-noc-v7-0-d65edbab2997@quicinc.com Changes in v7: - Move the content in header file into coresight-tnoc.c. - Use scoped_guard() to replace spin_lock(). - Invoke coresight_trace_id_put_system_id() for registration failure. - Link to v6: https://lore.kernel.org/r/20250522-trace-noc-v6-0-f5a9bcae90ee@quicinc.com Changes in v6: - Add a newline after return statements. - Use 'x &= foo' to replace 'x = x & foo'. - Use 'x |= foo' to replace 'x = x | foo'. - Link to v5: https://lore.kernel.org/r/20250512-trace-noc-v5-0-f2ef070baee5@quicinc.com Changes in v5: - update cover-letter to describe the Interconnect TNOC. - Link to v4: https://lore.kernel.org/r/20250415-trace-noc-v4-0-979938fedfd8@quicinc.com Changes in v4: - Fix dt_binding warning. - update mask of trace_noc amba_id. - Modify driver comments. - rename TRACE_NOC_SYN_VAL to TRACE_NOC_SYNC_INTERVAL. - Link to v3: https://lore.kernel.org/r/20250411-trace-noc-v3-0-1f19ddf7699b@quicinc.com Changes in v3: - Remove unnecessary sysfs nodes. - update commit messages. - Use 'writel' instead of 'write_relaxed' when writing to the register for the last time. - Add trace_id ops. - Link to v2: https://lore.kernel.org/r/20250226-trace-noc-driver-v2-0-8afc6584afc5@quici… Changes in v2: - Modified the format of DT binging file. - Fix compile warnings. - Link to v1: https://lore.kernel.org/r/46643089-b88d-49dc-be05-7bf0bb21f847@quicinc.com --- Yuanfang Zhang (2): dt-bindings: arm: Add device Trace Network On Chip definition coresight: add coresight Trace Network On Chip driver .../bindings/arm/qcom,coresight-tnoc.yaml | 113 ++++++++++ drivers/hwtracing/coresight/Kconfig | 13 ++ drivers/hwtracing/coresight/Makefile | 1 + drivers/hwtracing/coresight/coresight-tnoc.c | 242 +++++++++++++++++++++ 4 files changed, 369 insertions(+) --- base-commit: a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 change-id: 20250403-trace-noc-f8286b30408e Best regards, -- Yuanfang Zhang <quic_yuanfang(a)quicinc.com>

2 months, 1 week

[PATCH v8 0/2] coresight: Add Coresight Trace Network On Chip driver

by Yuanfang Zhang

The Trace Network On Chip (TNOC) is an integration hierarchy which is a hardware component that integrates the functionalities of TPDA and funnels. It collects trace from subsystems and transfers it to coresight sink. In addition to the generic TNOC mentioned above, there is also a special type of TNOC called Interconnect TNOC. Unlike the generic TNOC, the Interconnect TNOC doesn't need ATID. Its primary function is to connect the source of subsystems to the Aggregator TNOC. Its driver is different from this patch and will describe it and upstream its driver separately. Signed-off-by: Yuanfang Zhang <quic_yuanfang(a)quicinc.com> --- Changes in v8: - Add sysfs node to expose atid. - Link to v7: https://lore.kernel.org/r/20250523-trace-noc-v7-0-d65edbab2997@quicinc.com Changes in v7: - Move the content in header file into coresight-tnoc.c. - Use scoped_guard() to replace spin_lock(). - Invoke coresight_trace_id_put_system_id() for registration failure. - Link to v6: https://lore.kernel.org/r/20250522-trace-noc-v6-0-f5a9bcae90ee@quicinc.com Changes in v6: - Add a newline after return statements. - Use 'x &= foo' to replace 'x = x & foo'. - Use 'x |= foo' to replace 'x = x | foo'. - Link to v5: https://lore.kernel.org/r/20250512-trace-noc-v5-0-f2ef070baee5@quicinc.com Changes in v5: - update cover-letter to describe the Interconnect TNOC. - Link to v4: https://lore.kernel.org/r/20250415-trace-noc-v4-0-979938fedfd8@quicinc.com Changes in v4: - Fix dt_binding warning. - update mask of trace_noc amba_id. - Modify driver comments. - rename TRACE_NOC_SYN_VAL to TRACE_NOC_SYNC_INTERVAL. - Link to v3: https://lore.kernel.org/r/20250411-trace-noc-v3-0-1f19ddf7699b@quicinc.com Changes in v3: - Remove unnecessary sysfs nodes. - update commit messages. - Use 'writel' instead of 'write_relaxed' when writing to the register for the last time. - Add trace_id ops. - Link to v2: https://lore.kernel.org/r/20250226-trace-noc-driver-v2-0-8afc6584afc5@quici… Changes in v2: - Modified the format of DT binging file. - Fix compile warnings. - Link to v1: https://lore.kernel.org/r/46643089-b88d-49dc-be05-7bf0bb21f847@quicinc.com --- Yuanfang Zhang (2): dt-bindings: arm: Add device Trace Network On Chip definition coresight: add coresight Trace Network On Chip driver .../bindings/arm/qcom,coresight-tnoc.yaml | 111 ++++++++++ drivers/hwtracing/coresight/Kconfig | 13 ++ drivers/hwtracing/coresight/Makefile | 1 + drivers/hwtracing/coresight/coresight-tnoc.c | 242 +++++++++++++++++++++ 4 files changed, 367 insertions(+) --- base-commit: a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 change-id: 20250403-trace-noc-f8286b30408e Best regards, -- Yuanfang Zhang <quic_yuanfang(a)quicinc.com>

2 months, 2 weeks

[PATCH v6 0/2] coresight: Add Coresight Trace Network On Chip driver

by Yuanfang Zhang

The Trace Network On Chip (TNOC) is an integration hierarchy which is a hardware component that integrates the functionalities of TPDA and funnels. It collects trace from subsystems and transfers it to coresight sink. In addition to the generic TNOC mentioned above, there is also a special type of TNOC called Interconnect TNOC. Unlike the generic TNOC, the Interconnect TNOC doesn't need ATID. Its primary function is to connect the source of subsystems to the Aggregator TNOC. Its driver is different from this patch and will describe it and upstream its driver separately. Signed-off-by: Yuanfang Zhang <quic_yuanfang(a)quicinc.com> --- Changes in v6: - Add a newline after return statements. - Use 'x &= foo' to replace 'x = x & foo'. - Use 'x |= foo' to replace 'x = x | foo'. - Link to v5: https://lore.kernel.org/r/20250512-trace-noc-v5-0-f2ef070baee5@quicinc.com Changes in v5: - update cover-letter to describe the Interconnect TNOC. - Link to v4: https://lore.kernel.org/r/20250415-trace-noc-v4-0-979938fedfd8@quicinc.com Changes in v4: - Fix dt_binding warning. - update mask of trace_noc amba_id. - Modify driver comments. - rename TRACE_NOC_SYN_VAL to TRACE_NOC_SYNC_INTERVAL. - Link to v3: https://lore.kernel.org/r/20250411-trace-noc-v3-0-1f19ddf7699b@quicinc.com Changes in v3: - Remove unnecessary sysfs nodes. - update commit messages. - Use 'writel' instead of 'write_relaxed' when writing to the register for the last time. - Add trace_id ops. - Link to v2: https://lore.kernel.org/r/20250226-trace-noc-driver-v2-0-8afc6584afc5@quici… Changes in v2: - Modified the format of DT binging file. - Fix compile warnings. - Link to v1: https://lore.kernel.org/r/46643089-b88d-49dc-be05-7bf0bb21f847@quicinc.com --- Yuanfang Zhang (2): dt-bindings: arm: Add device Trace Network On Chip definition coresight: add coresight Trace Network On Chip driver .../bindings/arm/qcom,coresight-tnoc.yaml | 111 ++++++++++++ drivers/hwtracing/coresight/Kconfig | 13 ++ drivers/hwtracing/coresight/Makefile | 1 + drivers/hwtracing/coresight/coresight-tnoc.c | 192 +++++++++++++++++++++ drivers/hwtracing/coresight/coresight-tnoc.h | 34 ++++ 5 files changed, 351 insertions(+) --- base-commit: a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 change-id: 20250403-trace-noc-f8286b30408e Best regards, -- Yuanfang Zhang <quic_yuanfang(a)quicinc.com>

2 months, 2 weeks

[PATCH] coresight-tpdm: add trace_id sysfs node

by Yuanfang Zhang

The trace ID of TPMD is the trace ID of the TPDA or TNOC which it is connected to, this change adds trace_id sysfs node to expose this trace id to userspace. Signed-off-by: Yuanfang Zhang <quic_yuanfang(a)quicinc.com> --- drivers/hwtracing/coresight/coresight-tpdm.c | 16 ++++++++++++++++ drivers/hwtracing/coresight/coresight-tpdm.h | 2 ++ 2 files changed, 18 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c index 7214e65097ec9ac69f6c7c9278bcd28d25945c9e..8a5d115157924f39b09f8e3005827d7d64aa376c 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.c +++ b/drivers/hwtracing/coresight/coresight-tpdm.c @@ -497,6 +497,9 @@ static int tpdm_enable(struct coresight_device *csdev, struct perf_event *event, __tpdm_enable(drvdata); drvdata->enable = true; + + if (path) + drvdata->traceid = path->trace_id; spin_unlock(&drvdata->spinlock); dev_dbg(drvdata->dev, "TPDM tracing enabled\n"); @@ -554,6 +557,7 @@ static void tpdm_disable(struct coresight_device *csdev, __tpdm_disable(drvdata); coresight_set_mode(csdev, CS_MODE_DISABLED); drvdata->enable = false; + drvdata->traceid = 0; spin_unlock(&drvdata->spinlock); dev_dbg(drvdata->dev, "TPDM tracing disabled\n"); @@ -655,9 +659,21 @@ static ssize_t integration_test_store(struct device *dev, } static DEVICE_ATTR_WO(integration_test); +static ssize_t traceid_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + unsigned long val; + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + + val = drvdata->traceid; + return sprintf(buf, "%#lx\n", val); +} +static DEVICE_ATTR_RO(traceid); + static struct attribute *tpdm_attrs[] = { &dev_attr_reset_dataset.attr, &dev_attr_integration_test.attr, + &dev_attr_traceid.attr, NULL, }; diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h b/drivers/hwtracing/coresight/coresight-tpdm.h index b117543897344b689f666f6890cabb59c8ee4869..e12a64f265daa86f1b82fa3640e271e8386f99af 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.h +++ b/drivers/hwtracing/coresight/coresight-tpdm.h @@ -300,6 +300,7 @@ struct cmb_dataset { * @cmb Specifics associated to TPDM CMB. * @dsb_msr_num Number of MSR supported by DSB TPDM * @cmb_msr_num Number of MSR supported by CMB TPDM + * @traceid: Value of the current ID for this component. */ struct tpdm_drvdata { @@ -313,6 +314,7 @@ struct tpdm_drvdata { struct cmb_dataset *cmb; u32 dsb_msr_num; u32 cmb_msr_num; + u8 traceid; }; /* Enumerate members of various datasets */ --- base-commit: 94305e83eccb3120c921cd3a015cd74731140bac change-id: 20250523-showtraceid-2df91c89be8f Best regards, -- Yuanfang Zhang <quic_yuanfang(a)quicinc.com>

2 months, 3 weeks

Possibility of using Coresight STM - ETR as console for System Control Processor

by Linu Cherian

Hi, We are looking for console options( output only) for the SCP(system control processor)cores in our SOC other than UART and was considering STM as an option. Something like this, SCP ----> STM ---> ETR ---> DDR <--- Linux On the Linux system, some user space scripts can retrieve the ETR trace buffers and move it to a file on a periodic basis. Do you see any basic issue with this approach or have better alternatives to suggest ? Few issues we could think of, 1. SCP wont be able to route the messages to the STM -> ETR path until those are initialized by the Linux user space. Hence any messages until Linux comes up need to be buffered in the SCP local memory and should get flushed once the STM - ETR path is ready. 2. Possible message loss due to buffer overwrite We might have to reserve the ETR trace buffers only to the SCP and keep sufficiently large buffers to reduce the message loss. Assume that reserving a STM port for use by an external core can be achieved from the Linux STM sysfs interface. Thanks, Linu Cherian.

2 months, 3 weeks

[PATCH v7 0/2] coresight: Add Coresight Trace Network On Chip driver

by Yuanfang Zhang

The Trace Network On Chip (TNOC) is an integration hierarchy which is a hardware component that integrates the functionalities of TPDA and funnels. It collects trace from subsystems and transfers it to coresight sink. In addition to the generic TNOC mentioned above, there is also a special type of TNOC called Interconnect TNOC. Unlike the generic TNOC, the Interconnect TNOC doesn't need ATID. Its primary function is to connect the source of subsystems to the Aggregator TNOC. Its driver is different from this patch and will describe it and upstream its driver separately. Signed-off-by: Yuanfang Zhang <quic_yuanfang(a)quicinc.com> --- Changes in v7: - Move the content in header file into coresight-tnoc.c. - Use scoped_guard() to replace spin_lock(). - Invoke coresight_trace_id_put_system_id() for registration failure. - Link to v6: https://lore.kernel.org/r/20250522-trace-noc-v6-0-f5a9bcae90ee@quicinc.com Changes in v6: - Add a newline after return statements. - Use 'x &= foo' to replace 'x = x & foo'. - Use 'x |= foo' to replace 'x = x | foo'. - Link to v5: https://lore.kernel.org/r/20250512-trace-noc-v5-0-f2ef070baee5@quicinc.com Changes in v5: - update cover-letter to describe the Interconnect TNOC. - Link to v4: https://lore.kernel.org/r/20250415-trace-noc-v4-0-979938fedfd8@quicinc.com Changes in v4: - Fix dt_binding warning. - update mask of trace_noc amba_id. - Modify driver comments. - rename TRACE_NOC_SYN_VAL to TRACE_NOC_SYNC_INTERVAL. - Link to v3: https://lore.kernel.org/r/20250411-trace-noc-v3-0-1f19ddf7699b@quicinc.com Changes in v3: - Remove unnecessary sysfs nodes. - update commit messages. - Use 'writel' instead of 'write_relaxed' when writing to the register for the last time. - Add trace_id ops. - Link to v2: https://lore.kernel.org/r/20250226-trace-noc-driver-v2-0-8afc6584afc5@quici… Changes in v2: - Modified the format of DT binging file. - Fix compile warnings. - Link to v1: https://lore.kernel.org/r/46643089-b88d-49dc-be05-7bf0bb21f847@quicinc.com --- Yuanfang Zhang (2): dt-bindings: arm: Add device Trace Network On Chip definition coresight: add coresight Trace Network On Chip driver .../bindings/arm/qcom,coresight-tnoc.yaml | 111 +++++++++++ drivers/hwtracing/coresight/Kconfig | 13 ++ drivers/hwtracing/coresight/Makefile | 1 + drivers/hwtracing/coresight/coresight-tnoc.c | 216 +++++++++++++++++++++ 4 files changed, 341 insertions(+) --- base-commit: a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 change-id: 20250403-trace-noc-f8286b30408e Best regards, -- Yuanfang Zhang <quic_yuanfang(a)quicinc.com>

3 months

[GIT PULL] coresight: updates for Linux v6.16

by Suzuki K Poulose

Hi Greg, Please find the CoreSight self-hosted tracing subsystem updates for Linux v6.16. Kindly pull, Suzuki --- The following changes since commit 9c32cda43eb78f78c73aee4aa344b777714e259b: Linux 6.15-rc3 (2025-04-20 13:43:47 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git tags/coresight-next-v6.16 for you to fetch changes up to 408c97c4a5e0b634dcd15bf8b8808b382e888164: coresight: prevent deactivate active config while enabling the config (2025-05-20 16:38:54 +0100) ---------------------------------------------------------------- coresight: updates for Linux v6.16 CoreSight self-hosted trace driver subsystem updates for Linux v6.16 includes: - Clear CLAIM tags on device probe if self-hosted tags are set. - Support for perf AUX pause/resume for CoreSight ETM PMU driver, with trace collection at pause. - Miscellaneous fixes for the subsystem Signed-off-by: Suzuki K Poulose <suzuki.poulose(a)arm.com> ---------------------------------------------------------------- Andy Shevchenko (1): coresight: cti: Replace inclusion by struct fwnode_handle forward declaration Dmitry Baryshkov (1): dt-bindings: arm: arm,coresight-static-replicator: add optional clocks James Clark (8): coresight: Convert tag clear function to take a struct csdev_access coresight: Only check bottom two claim bits coresight: Add claim tag warnings and debug messages coresight: etm3x: Convert raw base pointer to struct coresight access coresight: Clear self hosted claim tag on probe coresight: Remove inlines from static function definitions coresight: Remove extern from function declarations coresight: Add a KUnit test for coresight_find_default_sink() Junhao He (1): coresight: Fixes device's owner field for registered using coresight_init_driver() Leo Yan (9): coresight: replicator: Fix panic for clearing claim tag coresight: etm4x: Extract the trace unit controlling coresight: Introduce pause and resume APIs for source coresight: etm4x: Hook pause and resume callbacks coresight: perf: Support AUX trace pause and resume coresight: tmc: Re-enable sink after buffer update coresight: perf: Update buffer on AUX pause Documentation: coresight: Document AUX pause and resume coresight: etm4x: Fix timestamp bit field handling Mao Jinlong (2): coresight: Disable MMIO logging for coresight stm driver coresight: tmc: fix failure to disable/enable ETF after reading Yabin Cui (2): coresight: catu: Introduce refcount and spinlock for enabling/disabling coresight: core: Disable helpers for devices that fail to enable Yeoreum Yun (3): coresight/etm4: fix missing disable active config coresight: holding cscfg_csdev_lock while removing cscfg from csdev coresight: prevent deactivate active config while enabling the config .../arm/arm,coresight-static-replicator.yaml | 13 ++ Documentation/trace/coresight/coresight-perf.rst | 31 ++++ drivers/hwtracing/coresight/Kconfig | 9 ++ drivers/hwtracing/coresight/Makefile | 3 + drivers/hwtracing/coresight/coresight-catu.c | 39 +++-- drivers/hwtracing/coresight/coresight-catu.h | 1 + drivers/hwtracing/coresight/coresight-config.h | 2 +- drivers/hwtracing/coresight/coresight-core.c | 131 ++++++++++++----- drivers/hwtracing/coresight/coresight-cpu-debug.c | 3 +- drivers/hwtracing/coresight/coresight-cti-core.c | 2 + drivers/hwtracing/coresight/coresight-cti.h | 3 +- drivers/hwtracing/coresight/coresight-etb10.c | 4 +- drivers/hwtracing/coresight/coresight-etm-perf.c | 84 ++++++++++- drivers/hwtracing/coresight/coresight-etm.h | 6 +- drivers/hwtracing/coresight/coresight-etm3x-core.c | 28 ++-- .../hwtracing/coresight/coresight-etm3x-sysfs.c | 8 +- drivers/hwtracing/coresight/coresight-etm4x-core.c | 158 +++++++++++++++------ .../hwtracing/coresight/coresight-etm4x-sysfs.c | 8 +- drivers/hwtracing/coresight/coresight-etm4x.h | 2 + drivers/hwtracing/coresight/coresight-funnel.c | 4 +- .../hwtracing/coresight/coresight-kunit-tests.c | 74 ++++++++++ drivers/hwtracing/coresight/coresight-platform.c | 26 ++-- drivers/hwtracing/coresight/coresight-priv.h | 22 +-- drivers/hwtracing/coresight/coresight-replicator.c | 6 +- drivers/hwtracing/coresight/coresight-stm.c | 8 +- .../coresight/coresight-syscfg-configfs.c | 2 +- drivers/hwtracing/coresight/coresight-syscfg.c | 51 +++++-- drivers/hwtracing/coresight/coresight-tmc-core.c | 11 +- drivers/hwtracing/coresight/coresight-tmc-etf.c | 20 ++- drivers/hwtracing/coresight/coresight-tmc-etr.c | 26 ++-- drivers/hwtracing/coresight/coresight-tpiu.c | 2 +- drivers/hwtracing/coresight/coresight-trbe.c | 18 +-- include/linux/coresight.h | 44 +++--- 33 files changed, 624 insertions(+), 225 deletions(-) create mode 100644 drivers/hwtracing/coresight/coresight-kunit-tests.c

3 months

[PATCH v3 0/2] coresight: etm4x: Refactor trace filter

by Leo Yan

This series is minor refactoring for trace filter and comes from the previous patch set [1]. The first patch introduces a new helper has_feat_trf() for detecing if FEAT_TRF is implemented. This is more readable. The second patch refactors the ts_source_show() function. It simplifies to directly return the TS value when FEAT_TRF is implemented. [1] https://lore.kernel.org/linux-arm-kernel/20250519174945.2245271-1-leo.yan@a… Changes from v2: - Added the has_feat_trf() helper for more readable (James Clark) Leo Yan (2): coresight: etm4x: Introduce has_feat_trf() helper coresight: etm4x: Refactor returning TS field drivers/hwtracing/coresight/coresight-etm4x-core.c | 8 ++++---- drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 18 +++--------------- drivers/hwtracing/coresight/coresight-etm4x.h | 9 +++++++++ 3 files changed, 16 insertions(+), 19 deletions(-) -- 2.34.1

3 months

← Newer
1
...
6
7
8
9
10
11
12
...
245
Older →

Jump to page:

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

CoreSight