CoreSight

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2390 discussions

Re: [PATCH 1/3] coresight: etm4x: Do not hardcode IOMEM access for register restore

by Suzuki K Poulose

On 11/04/2024 23:30, Yabin Cui wrote: > On Thu, Apr 11, 2024 at 4:31 AM Suzuki K Poulose <suzuki.poulose(a)arm.com> wrote: >> >> When we restore the register state for ETM4x, while coming back >> from CPU idle, we hardcode IOMEM access. This is wrong and could >> blow up for an ETM with system instructions access (and for ETE). >> >> Fixes: f5bd523690d2f ("coresight: etm4x: Convert all register accesses") >> Reported-by: Yabin Cui <yabinc(a)google.com> >> Signed-off-by: Suzuki K Poulose <suzuki.poulose(a)arm.com> >> --- >> drivers/hwtracing/coresight/coresight-etm4x-core.c | 6 ++++-- >> 1 file changed, 4 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c >> index c2ca4a02dfce..fae96151cdaf 100644 >> --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c >> +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c >> @@ -1843,8 +1843,10 @@ static void __etm4_cpu_restore(struct etmv4_drvdata *drvdata) >> { >> int i; >> struct etmv4_save_state *state = drvdata->save_state; >> - struct csdev_access tmp_csa = CSDEV_ACCESS_IOMEM(drvdata->base); >> - struct csdev_access *csa = &tmp_csa; >> + struct csdev_access *csa = &drvdata->csdev->access; >> + >> + if (!WARN_ON(!drvdata->csdev)) > > COMMENT: Remove ! before WARN_ON? WARN_ON returns 1 when the warning happens. > Yikes! Well spotted, I will fix this. Suzuki >> + return; >> >> etm4_cs_unlock(drvdata, csa); >> etm4x_relaxed_write32(csa, state->trcclaimset, TRCCLAIMSET); >> -- >> 2.34.1 >>

1 year, 2 months

Lockdep splat in TMC ETR

by Denis Nikitin

Hello CoreSight friends, There is a bug recently reported on ChromeOS (with the linux kernel 6.6), https://issuetracker.google.com/329285580. Lockdep detected a deadlock in TMC ETR in a debug kernel build. [12453.456471] WARNING: possible circular locking dependency detected [12453.456518] 6.6.21-lockdep-01250-gbecf1787b73c #1 Not tainted [12453.456575] ------------------------------------------------------ [12453.456618] perf/12414 is trying to acquire lock: [12453.456671] ffffffc084bc0990 (&dma_entry_hash[i].lock){-.-.}-{2:2}, at: check_sync+0x84/0x11a0 [12453.456896] but task is already holding lock: [12453.456938] ffffff80cdb940f8 (&drvdata->spinlock){....}-{2:2}, at: tmc_update_etr_buffer+0xbc/0x898 [coresight_tmc] [12453.457332] which lock already depends on the new lock. Could you please take a look? Thanks, Denis Nikitin

1 year, 2 months

Re: [PATCH 00/19] amba: store owner from modules with amba_driver_register()

by Suzuki K Poulose

On 27/03/2024 05:57, Krzysztof Kozlowski wrote: > On 27/03/2024 00:24, Suzuki K Poulose wrote: >> Hi Krzysztof >> >> On 26/03/2024 20:23, Krzysztof Kozlowski wrote: >>> Merging >>> ======= >>> All further patches depend on the first amba patch, therefore please ack >>> and this should go via one tree. >> >> Are you able to provide a stable branch with these patches once you pull > > I doubt I will be merging this. I think amba code goes through Russell. > >> them in to "one tree" here ? We have changes coming up in the coresight >> tree, which would conflict with the changes here (horribly). >> > > You mean conflict with coresight conversion to platform driver? Worst Yes. > case it is solveable: just drop .owner. Or, we could merge the CoreSight changes (as they are really not affected by the problem this series is trying to address) after the base changes land in AMBA, via the CoreSight tree. Suzuki > > Best regards, > Krzysztof >

1 year, 3 months

Re: [PATCH 00/19] amba: store owner from modules with amba_driver_register()

by Suzuki K Poulose

Hi Krzysztof On 26/03/2024 20:23, Krzysztof Kozlowski wrote: > Merging > ======= > All further patches depend on the first amba patch, therefore please ack > and this should go via one tree. Are you able to provide a stable branch with these patches once you pull them in to "one tree" here ? We have changes coming up in the coresight tree, which would conflict with the changes here (horribly). FWIW, For patches 1 to 13 : Acked-by: Suzuki K Poulose <suzuki.poulose(a)arm.com> Suzuki

1 year, 3 months

Re: [PATCH RESEND 1/2] dt-bindings: arm: qcom,coresight-tpda: drop redundant type from ports

by Suzuki K Poulose

Hi Krzysztof On 25/03/2024 10:40, Krzysztof Kozlowski wrote: > "in-ports" and "out-ports" are defined by graph schema, so defining its > type is redundant. > > Acked-by: Rob Herring <robh(a)kernel.org> > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski(a)linaro.org> Both patches look good to me. How would you like to pull this ? I could queue them for v6.10 via coresight tree. If you would like to take them, Acked-by: Suzuki K Poulose <suzuki.poulose(a)arm.com> Suzuki > > --- > > No changes, but patches were split from previous set. First patch in > previouis series was being discussed, so let's just make these accepted. > > v1: https://lore.kernel.org/all/20231206115332.22712-1-krzysztof.kozlowski@lina… > --- > Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml | 2 -- > 1 file changed, 2 deletions(-) > > diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml > index ea3c5db6b52d..7fbd855a66a0 100644 > --- a/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml > +++ b/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml > @@ -66,13 +66,11 @@ properties: > - const: apb_pclk > > in-ports: > - type: object > description: | > Input connections from TPDM to TPDA > $ref: /schemas/graph.yaml#/properties/ports > > out-ports: > - type: object > description: | > Output connections from the TPDA to legacy CoreSight trace bus. > $ref: /schemas/graph.yaml#/properties/ports

1 year, 3 months

Re: [PATCH 1/4] dt-bindings: arm: qcom,coresight-funnel: Add label for multi-ouput

by Tingwei Zhang

On 3/21/2024 10:42 PM, Rob Herring wrote: > On Thu, Mar 21, 2024 at 04:32:04PM +0800, Tao Zhang wrote: >> Add new property "label" to label the source corresponding to the >> output connection. When the funnel supports multi-output, this >> property needs to be introduced to mark which source component a >> certain output connection corresponds to. >> >> Signed-off-by: Tao Zhang <quic_taozha(a)quicinc.com> >> --- >> .../arm/arm,coresight-dynamic-funnel.yaml | 34 ++++++++++++++++--- >> 1 file changed, 30 insertions(+), 4 deletions(-) >> >> diff --git a/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml b/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml >> index 44a1041cb0fc..cde62c286d29 100644 >> --- a/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml >> +++ b/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml >> @@ -66,13 +66,39 @@ properties: >> $ref: /schemas/graph.yaml#/properties/port >> >> out-ports: >> - $ref: /schemas/graph.yaml#/properties/ports >> - additionalProperties: false >> - >> + type: object >> properties: >> + "#address-cells": >> + const: 1 >> + >> + "#size-cells": >> + const: 0 >> + >> port: >> + type: object >> + >> + patternProperties: >> + '^port(@[0-7])?$': >> + type: object >> description: Output connection to CoreSight Trace bus >> - $ref: /schemas/graph.yaml#/properties/port > > Nope, now you have no constraints on port node properties. Please look > at how other bindings are done to add properties on endpoint node. > Thanks for pointing this out, Rob. Shall we ref port-base and endpoint-base then add new properties on endpoint? In this way, the redundant code from port schema is not required. >> + >> + patternProperties: >> + "^endpoint(@[0-9a-f]+)?$": >> + type: object >> + properties: >> + remote-endpoint: >> + description: | >> + phandle to an 'endpoint' subnode of a remote device node. >> + $ref: /schemas/types.yaml#/definitions/phandle > > Don't need this. > >> + label: >> + description: Label the source corresponding to the output connection >> + $ref: /schemas/types.yaml#/definitions/string > > label already has a type. > > As this node is an output, aren't you labeling what the destination is, > not the "source"? > > Why can't you look at the remote connection to identify what it is? > This funnel can route data stream from different trace source to different output ports. This lable property is added to describe which source is routed to this output port. For example, the graph is as below. Funnel3 routes trace data from TPDM0 to output[0] and output[0] of funnel3 is connected to input[0] of TPDA0. While Funnels routes trace data from TPDM1 to output[1] which connects to input[1] of TPDA0. Hope that clarifies this a little bit. |---------| |---------| |---------| |---------| |---------| | TPDM0 | | TPDM1 | | TPDM2 | | TPDM3 | | TPDM4 | |---------| |---------| |---------| |---------| |---------| | | | | | | | | | | | | | | | |-----| |-----| |-----| |-----| | | | | | | | | | | | [0]| |[1] [0]| |[1] | \-------------/ \-------------/ \------------/ \ FUNNEL0 / \ FUNNEL1 / \ FUNNEL2 / ----------- ----------- ----------- | | | \-------------/ \-------------/ | \ FUNNEL3 / \ FUNNEL4 / | ----------- ----------- | | | | | [0]| |[1] [0]| |[1] | | |---------- | | | | | | | | |-------| | |------- | | |--------- | | | | | | | | | | | [0]| |[1] |[2] |[3] |[4] \ ---------------------------------------------------/ \ TPDA0 / \ / ------------------------------------------------ > >> + oneOf: >> + - required: >> + - port >> + - required: >> + - "#address-cells" >> + - "#size-cells" > > The common schema that you removed handles this. > > Rob -- Thanks, Tingwei

1 year, 3 months

Re: [PATCH 1/4] dt-bindings: arm: qcom,coresight-funnel: Add label for multi-ouput

by Suzuki K Poulose

On 21/03/2024 14:42, Rob Herring wrote: > On Thu, Mar 21, 2024 at 04:32:04PM +0800, Tao Zhang wrote: >> Add new property "label" to label the source corresponding to the >> output connection. When the funnel supports multi-output, this >> property needs to be introduced to mark which source component a >> certain output connection corresponds to. >> >> Signed-off-by: Tao Zhang <quic_taozha(a)quicinc.com> >> --- >> .../arm/arm,coresight-dynamic-funnel.yaml | 34 ++++++++++++++++--- >> 1 file changed, 30 insertions(+), 4 deletions(-) >> >> diff --git a/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml b/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml >> index 44a1041cb0fc..cde62c286d29 100644 >> --- a/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml >> +++ b/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml >> @@ -66,13 +66,39 @@ properties: >> $ref: /schemas/graph.yaml#/properties/port >> >> out-ports: >> - $ref: /schemas/graph.yaml#/properties/ports >> - additionalProperties: false >> - >> + type: object >> properties: >> + "#address-cells": >> + const: 1 >> + >> + "#size-cells": >> + const: 0 >> + >> port: >> + type: object >> + >> + patternProperties: >> + '^port(@[0-7])?$': >> + type: object >> description: Output connection to CoreSight Trace bus >> - $ref: /schemas/graph.yaml#/properties/port > > Nope, now you have no constraints on port node properties. Please look > at how other bindings are done to add properties on endpoint node. > >> + >> + patternProperties: >> + "^endpoint(@[0-9a-f]+)?$": >> + type: object >> + properties: >> + remote-endpoint: >> + description: | >> + phandle to an 'endpoint' subnode of a remote device node. >> + $ref: /schemas/types.yaml#/definitions/phandle > > Don't need this. > >> + label: >> + description: Label the source corresponding to the output connection >> + $ref: /schemas/types.yaml#/definitions/string > > label already has a type. > > As this node is an output, aren't you labeling what the destination is, > not the "source"? > > Why can't you look at the remote connection to identify what it is? +1 Suzuki > > >> + oneOf: >> + - required: >> + - port >> + - required: >> + - "#address-cells" >> + - "#size-cells" > > The common schema that you removed handles this. > > Rob

1 year, 3 months

[PATCH V6 00/11] coresight: Move remaining AMBA ACPI devices into platform driver

by Anshuman Khandual

This moves remaining AMBA ACPI devices into respective platform drivers for enabling ACPI based power management support. This series applies on latest coresight next. This series has been built, and boot tested on a DT based (RB5) and ACPI supported coresight platform (N1SDP). https://git.gitlab.arm.com/linux-arm/linux-anshuman.git (amba_other_acpi_migration_v6) Cc: Lorenzo Pieralisi <lpieralisi(a)kernel.org> Cc: Sudeep Holla <sudeep.holla(a)arm.com> Cc: Suzuki K Poulose <suzuki.poulose(a)arm.com> Cc: Mike Leach <mike.leach(a)linaro.org> Cc: James Clark <james.clark(a)arm.com> Cc: Maxime Coquelin <mcoquelin.stm32(a)gmail.com> Cc: Alexandre Torgue <alexandre.torgue(a)foss.st.com> Cc: linux-acpi(a)vger.kernel.org Cc: linux-arm-kernel(a)lists.infradead.org Cc: linux-kernel(a)vger.kernel.org Cc: coresight(a)lists.linaro.org Cc: linux-stm32(a)st-md-mailman.stormreply.com Changes in V6: - Dropped Jame's RB tag from [PATCH 3/11] - Added clk_disable_unprepare() for pclk in replicator_probe() error path - Added clk_disable_unprepare() for pclk in funnel_probe() error path - Added clk_put() for pclk in catu_platform_probe() error path - Added clk_put() for pclk in debug_platform_probe() error path - Added WARN_ON(!drvdata) check in replicator_platform_remove() - Added WARN_ON(!drvdata) check in funnel_platform_remove() - Added WARN_ON(!drvdata) check in catu_platform_remove() - Added WARN_ON(!drvdata) check in tpiu_platform_remove() - Added WARN_ON(!drvdata) check in tmc_platform_remove() - Added WARN_ON(!drvdata) check in stm_platform_remove() - Added WARN_ON(!drvdata) check in debug_platform_remove() - Added additional elements for all acpi_device_id[] updates Changes in V5: https://lore.kernel.org/all/20240222082142.3663983-1-anshuman.khandual@arm.… - Used table->mask to filter out bits from pid in coresight_get_uci_data_from_amba() - Dropped custom masks such as STM_AMBA_MASK and TMC_AMBA_MASK - Modified tmc_etr_setup_caps() to accept struct csdev_access argument - Reverted back tmc_etr_setup_caps() call site position in tmc_probe() - Changed replicator and funnel devices to use the new helpers earlier in series - Updated the commit messages regarding xxx_probe() refactoring and renaming Changes in V4: https://lore.kernel.org/all/20240123054608.1790189-1-anshuman.khandual@arm.… - Fixed PM imbalance in etm4_probe() error path with pm_runtime_disable() - Restored back the pm_runtime_disable() on platform probe error paths in replicator, funnel, catu, tpiu, tmc and stm devices - Dropped dev_caps argument from __tmc_probe() - Changed xxxx_platform_remove() for platform_driver->remove_new() callback Changes in V3: https://lore.kernel.org/all/20231208053939.42901-1-anshuman.khandual@arm.co… - Split coresight_init_driver/remove_driver() helpers into a separate patch - Added 'drvdata->pclk' comments in replicator, funnel, tpiu, tmc, and stm devices - Updated funnel, and replicator drivers to use these new helpers - Check for drvdata instead of drvdata->pclk in suspend and resume paths in catu, tmc and debug devices - Added patch to extract device name from AMBA pid based table lookup for stm - Added patch to extract device properties from AMBA pid based table look for tmc - Dropped pm_runtime_put() from common __probe() functions - Handled pm_runtime_put() in AMBA driver in success path - Handled pm_runtime_put() in platform driver in both success and error paths Changes in V2: https://lore.kernel.org/all/20231201062053.1268492-1-anshuman.khandual@arm.… - Dropped redundant devm_ioremap_resource() hunk from tmc_platform_probe() - Defined coresight_[init|remove]_driver() for both AMBA/platform drivers - Changed catu, tmc, tpiu, stm and debug coresight drivers to use the new helpers avoiding build issues arising from module_amba_driver(), and module_platform_driver() being on the same file Changes in V1: https://lore.kernel.org/all/20231027072943.3418997-1-anshuman.khandual@arm.… - Replaced all IS_ERR() instances with IS_ERR_OR_NULL() as per Suzuki Changes in RFC: https://lore.kernel.org/all/20230921042040.1334641-1-anshuman.khandual@arm.… Anshuman Khandual (11): coresight: etm4x: Fix unbalanced pm_runtime_enable() coresight: stm: Extract device name from AMBA pid based table lookup coresight: tmc: Extract device properties from AMBA pid based table lookup coresight: Add helpers registering/removing both AMBA and platform drivers coresight: replicator: Move ACPI support from AMBA driver to platform driver coresight: funnel: Move ACPI support from AMBA driver to platform driver coresight: catu: Move ACPI support from AMBA driver to platform driver coresight: tpiu: Move ACPI support from AMBA driver to platform driver coresight: tmc: Move ACPI support from AMBA driver to platform driver coresight: stm: Move ACPI support from AMBA driver to platform driver coresight: debug: Move ACPI support from AMBA driver to platform driver drivers/acpi/arm64/amba.c | 8 - drivers/hwtracing/coresight/coresight-catu.c | 146 ++++++++++++++--- drivers/hwtracing/coresight/coresight-catu.h | 1 + drivers/hwtracing/coresight/coresight-core.c | 29 ++++ .../hwtracing/coresight/coresight-cpu-debug.c | 146 ++++++++++++++--- .../coresight/coresight-etm4x-core.c | 3 + .../hwtracing/coresight/coresight-funnel.c | 87 +++++----- drivers/hwtracing/coresight/coresight-priv.h | 10 ++ .../coresight/coresight-replicator.c | 82 +++++----- drivers/hwtracing/coresight/coresight-stm.c | 116 +++++++++++-- .../hwtracing/coresight/coresight-tmc-core.c | 154 +++++++++++++++--- drivers/hwtracing/coresight/coresight-tmc.h | 2 + drivers/hwtracing/coresight/coresight-tpiu.c | 103 ++++++++++-- include/linux/coresight.h | 7 + 14 files changed, 729 insertions(+), 165 deletions(-) -- 2.25.1

1 year, 3 months

[PATCH V5 00/11] coresight: Move remaining AMBA ACPI devices into platform driver

by Anshuman Khandual

This moves remaining AMBA ACPI devices into respective platform drivers for enabling ACPI based power management support. This series applies on kernel v6.8-rc5 release. This series has been built, and boot tested on a DT based (RB5) and ACPI supported coresight platform (N1SDP). https://git.gitlab.arm.com/linux-arm/linux-anshuman.git (amba_other_acpi_migration_v5) Cc: Lorenzo Pieralisi <lpieralisi(a)kernel.org> Cc: Sudeep Holla <sudeep.holla(a)arm.com> Cc: Suzuki K Poulose <suzuki.poulose(a)arm.com> Cc: Mike Leach <mike.leach(a)linaro.org> Cc: James Clark <james.clark(a)arm.com> Cc: Maxime Coquelin <mcoquelin.stm32(a)gmail.com> Cc: Alexandre Torgue <alexandre.torgue(a)foss.st.com> Cc: linux-acpi(a)vger.kernel.org Cc: linux-arm-kernel(a)lists.infradead.org Cc: linux-kernel(a)vger.kernel.org Cc: coresight(a)lists.linaro.org Cc: linux-stm32(a)st-md-mailman.stormreply.com Changes in V5: - Used table->mask to filter out bits from pid in coresight_get_uci_data_from_amba() - Dropped custom masks such as STM_AMBA_MASK and TMC_AMBA_MASK - Modified tmc_etr_setup_caps() to accept struct csdev_access argument - Reverted back tmc_etr_setup_caps() call site position in tmc_probe() - Changed replicator and funnel devices to use the new helpers earlier in series - Updated the commit messages regarding xxx_probe() refactoring and renaming Changes in V4: https://lore.kernel.org/all/20240123054608.1790189-1-anshuman.khandual@arm.… - Fixed PM imbalance in etm4_probe() error path with pm_runtime_disable() - Restored back the pm_runtime_disable() on platform probe error paths in replicator, funnel, catu, tpiu, tmc and stm devices - Dropped dev_caps argument from __tmc_probe() - Changed xxxx_platform_remove() for platform_driver->remove_new() callback Changes in V3: https://lore.kernel.org/all/20231208053939.42901-1-anshuman.khandual@arm.co… - Split coresight_init_driver/remove_driver() helpers into a separate patch - Added 'drvdata->pclk' comments in replicator, funnel, tpiu, tmc, and stm devices - Updated funnel, and replicator drivers to use these new helpers - Check for drvdata instead of drvdata->pclk in suspend and resume paths in catu, tmc and debug devices - Added patch to extract device name from AMBA pid based table lookup for stm - Added patch to extract device properties from AMBA pid based table look for tmc - Dropped pm_runtime_put() from common __probe() functions - Handled pm_runtime_put() in AMBA driver in success path - Handled pm_runtime_put() in platform driver in both success and error paths Changes in V2: https://lore.kernel.org/all/20231201062053.1268492-1-anshuman.khandual@arm.… - Dropped redundant devm_ioremap_resource() hunk from tmc_platform_probe() - Defined coresight_[init|remove]_driver() for both AMBA/platform drivers - Changed catu, tmc, tpiu, stm and debug coresight drivers to use the new helpers avoiding build issues arising from module_amba_driver(), and module_platform_driver() being on the same file Changes in V1: https://lore.kernel.org/all/20231027072943.3418997-1-anshuman.khandual@arm.… - Replaced all IS_ERR() instances with IS_ERR_OR_NULL() as per Suzuki Changes in RFC: https://lore.kernel.org/all/20230921042040.1334641-1-anshuman.khandual@arm.… Anshuman Khandual (11): coresight: etm4x: Fix unbalanced pm_runtime_enable() coresight: stm: Extract device name from AMBA pid based table lookup coresight: tmc: Extract device properties from AMBA pid based table lookup coresight: Add helpers registering/removing both AMBA and platform drivers coresight: replicator: Move ACPI support from AMBA driver to platform driver coresight: funnel: Move ACPI support from AMBA driver to platform driver coresight: catu: Move ACPI support from AMBA driver to platform driver coresight: tpiu: Move ACPI support from AMBA driver to platform driver coresight: tmc: Move ACPI support from AMBA driver to platform driver coresight: stm: Move ACPI support from AMBA driver to platform driver coresight: debug: Move ACPI support from AMBA driver to platform driver drivers/acpi/arm64/amba.c | 8 - drivers/hwtracing/coresight/coresight-catu.c | 142 +++++++++++++--- drivers/hwtracing/coresight/coresight-catu.h | 1 + drivers/hwtracing/coresight/coresight-core.c | 29 ++++ .../hwtracing/coresight/coresight-cpu-debug.c | 141 ++++++++++++++-- .../coresight/coresight-etm4x-core.c | 3 + .../hwtracing/coresight/coresight-funnel.c | 86 +++++----- drivers/hwtracing/coresight/coresight-priv.h | 10 ++ .../coresight/coresight-replicator.c | 81 +++++----- drivers/hwtracing/coresight/coresight-stm.c | 115 +++++++++++-- .../hwtracing/coresight/coresight-tmc-core.c | 153 +++++++++++++++--- drivers/hwtracing/coresight/coresight-tmc.h | 2 + drivers/hwtracing/coresight/coresight-tpiu.c | 102 ++++++++++-- include/linux/coresight.h | 7 + 14 files changed, 721 insertions(+), 159 deletions(-) -- 2.25.1

1 year, 3 months

Can OpenCSD traces be displayed with tools like Trace Compass?

by Brian Hutchinson

Hi, I've long been interested in the ARM Coresight tools and played around with OpenOCD some. I'm just now getting into OpenCSD so please forgive the noob question but I did search the archives first. I'm curious if the format of OpenCSD traces is such that other tools like TraceCompass can unwind and graphically show them. I'm wondering if I can get like LTTng type info (system wide big picture - kernel plus userspace) out of OpenCSD but take advantage of the built in hardware (ETM etc.) that shouldn't introduce as much latency as other tools like LTTng, trace-cmd etc. Thanks, Brian

1 year, 4 months

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