CoreSight

coresight@lists.linaro.org

6 participants
2436 discussions

[PATCH v11 0/2] coresight: Add label sysfs node support

by Mao Jinlong

Change since V10: 1. Update kernel version to 6.18 V10 link: https://lkml.org/lkml/2025/8/6/520 Change since V9: 1. Replace scnprintf with sysfs_emit. 2. Update date in ABI files. V9 link: https://lkml.org/lkml/2025/7/17/832 Change since V8: 1. Add label in all documentations of coresight components. 2. Add control of the visibility of the label sysfs attribute. V8 link: https://lkml.org/lkml/2025/7/3/985 Change since V7: 1. Update the conflict when apply to coresight next. 2. Update the Date and version in ABI file. V7 link: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20250226121926.… Change since V6: 1. Update the date and version in ABI file. Change since V5: 1. Update the kernel version of ABI files. 2. Add link of different patch versions. V5 link: https://patchwork.kernel.org/project/linux-arm-msm/cover/20241210122253.319… Change since V4: 1. Add label in DT and add label sysfs node for each coresight device. V4 link: https://patchwork.kernel.org/project/linux-arm-msm/cover/20240703122340.268… 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. V3 link: https://patchwork.kernel.org/project/linux-arm-msm/cover/20240131082628.628… 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 V2 link: https://patchwork.kernel.org/project/linux-arm-msm/cover/20240115164252.265… Change since V1: 1. Change coresight-name to device name. 2. Add the device-name in coresight dt bindings. V1 link: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20230208110716.… Mao Jinlong (2): dt-bindings: arm: Add label in the coresight components coresight: Add label sysfs node support .../testing/sysfs-bus-coresight-devices-cti | 6 ++ .../sysfs-bus-coresight-devices-dummy-source | 6 ++ .../testing/sysfs-bus-coresight-devices-etb10 | 6 ++ .../testing/sysfs-bus-coresight-devices-etm3x | 6 ++ .../testing/sysfs-bus-coresight-devices-etm4x | 6 ++ .../sysfs-bus-coresight-devices-funnel | 6 ++ .../testing/sysfs-bus-coresight-devices-stm | 6 ++ .../testing/sysfs-bus-coresight-devices-tmc | 6 ++ .../testing/sysfs-bus-coresight-devices-tpdm | 6 ++ .../testing/sysfs-bus-coresight-devices-trbe | 6 ++ .../bindings/arm/arm,coresight-cti.yaml | 4 ++ .../arm/arm,coresight-dummy-sink.yaml | 4 ++ .../arm/arm,coresight-dummy-source.yaml | 4 ++ .../arm/arm,coresight-dynamic-funnel.yaml | 4 ++ .../arm/arm,coresight-dynamic-replicator.yaml | 4 ++ .../bindings/arm/arm,coresight-etb10.yaml | 4 ++ .../bindings/arm/arm,coresight-etm.yaml | 4 ++ .../arm/arm,coresight-static-funnel.yaml | 4 ++ .../arm/arm,coresight-static-replicator.yaml | 4 ++ .../bindings/arm/arm,coresight-tmc.yaml | 4 ++ .../bindings/arm/arm,coresight-tpiu.yaml | 4 ++ .../bindings/arm/qcom,coresight-ctcu.yaml | 4 ++ .../arm/qcom,coresight-remote-etm.yaml | 4 ++ .../bindings/arm/qcom,coresight-tpda.yaml | 4 ++ .../bindings/arm/qcom,coresight-tpdm.yaml | 4 ++ drivers/hwtracing/coresight/coresight-sysfs.c | 71 ++++++++++++++++++- 26 files changed, 189 insertions(+), 2 deletions(-) -- 2.34.1

1 day, 10 hours

[PATCH 0/3] coresight-tnoc: Add support for Interconnect TNOC

by Yuanfang Zhang

This patch series adds support for the Qualcomm CoreSight Interconnect TNOC (Trace Network On Chip) block, which acts as a CoreSight graph link forwarding trace data from subsystems to the Aggregator TNOC. Unlike the Aggregator TNOC, this block does not support aggregation or ATID assignment. Signed-off-by: Yuanfang Zhang <yuanfang.zhang(a)oss.qualcomm.com> --- Yuanfang Zhang (3): dt-bindings: arm: qcom: Add Coresight Interconnect TNOC coresight-tnoc: add platform driver to support Interconnect TNOC coresight-tnoc: Add runtime PM support for Interconnect TNOC .../bindings/arm/qcom,coresight-itnoc.yaml | 108 +++++++++++++ drivers/hwtracing/coresight/coresight-tnoc.c | 179 +++++++++++++++------ 2 files changed, 240 insertions(+), 47 deletions(-) --- base-commit: 2b52cf338d39d684a1c6af298e8204902c026aca change-id: 20250815-itnoc-460273d1b80c Best regards, -- Yuanfang Zhang <yuanfang.zhang(a)oss.qualcomm.com>

2 days, 4 hours

[PATCH 0/6] coresight: Add format attribute for setting the timestamp interval

by James Clark

Do some cleanups then add a new format attribute to set the timestamp interval for ETMv4 in Perf mode. The current interval is too high for most use cases, and particularly on the FVP the number of timestamps generated is excessive. Although it would be good to make only SYNC timestamps the default and have counter timestamps opt-in, this would be a breaking change. We can always do that later, or disable counter timestamps from Perf. This is added as an event format attribute, rather than a Coresight config because it's something that the driver is already configuring automatically in Perf mode with any unused counter, so it's not possible to modify this with a config. Applies to coresight/next Signed-off-by: James Clark <james.clark(a)linaro.org> --- James Clark (6): coresight: Change syncfreq to be a u8 coresight: Fix holes in struct etmv4_config coresight: Repack struct etmv4_drvdata coresight: Refactor etm4_config_timestamp_event() coresight: Add format attribute for setting the timestamp interval coresight: docs: Document etm4x ts_interval Documentation/trace/coresight/coresight.rst | 14 +++ drivers/hwtracing/coresight/coresight-etm-perf.c | 6 +- drivers/hwtracing/coresight/coresight-etm4x-core.c | 110 +++++++++++++-------- drivers/hwtracing/coresight/coresight-etm4x.h | 86 ++++++++++------ 4 files changed, 144 insertions(+), 72 deletions(-) --- base-commit: a80198ba650f50d266d7fc4a6c5262df9970f9f2 change-id: 20250724-james-cs-syncfreq-7c2257a38ed3 Best regards, -- James Clark <james.clark(a)linaro.org>

3 days, 4 hours

Re: [PATCH v2] coresight-etm4x: Conditionally access register TRCEXTINSELR

by James Clark

On 12/08/2025 9:24 am, Yuanfang Zhang wrote: > The TRCEXTINSELR is only implemented if TRCIDR5.NUMEXTINSEL > 0. > To avoid invalid accesses, introduce a check on numextinsel > (derived from TRCIDR5[11:9]) before reading or writing to this register. > > Fixes: f5bd523690d2 ("coresight: etm4x: Convert all register accesses") This tag isn't right. Although this is where the register accesses were last touched, the root issue was present from the introduction of the driver. > Signed-off-by: Yuanfang Zhang <yuanfang.zhang(a)oss.qualcomm.com> > --- > Changes in v2: > - Add fixes tag. > - Replace "if (drvdata->nrseqstate)" with "if (drvdata->numextinsel)" > - Link to v1: https://lore.kernel.org/r/20250811-trcextinselr_issue-v1-1-ed78f3215502@oss… > --- > drivers/hwtracing/coresight/coresight-etm4x-core.c | 11 ++++++++--- > drivers/hwtracing/coresight/coresight-etm4x.h | 2 ++ > 2 files changed, 10 insertions(+), 3 deletions(-) > > diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c > index 42e5d37403addc6ec81f2e3184522d67d1677c04..4e411427303981104d11720d3c73af91030f8df3 100644 > --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c > +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c > @@ -528,7 +528,8 @@ static int etm4_enable_hw(struct etmv4_drvdata *drvdata) > etm4x_relaxed_write32(csa, config->seq_rst, TRCSEQRSTEVR); > etm4x_relaxed_write32(csa, config->seq_state, TRCSEQSTR); > } > - etm4x_relaxed_write32(csa, config->ext_inp, TRCEXTINSELR); > + if (drvdata->numextinsel) > + etm4x_relaxed_write32(csa, config->ext_inp, TRCEXTINSELR); > for (i = 0; i < drvdata->nr_cntr; i++) { > etm4x_relaxed_write32(csa, config->cntrldvr[i], TRCCNTRLDVRn(i)); > etm4x_relaxed_write32(csa, config->cntr_ctrl[i], TRCCNTCTLRn(i)); > @@ -1423,6 +1424,7 @@ static void etm4_init_arch_data(void *info) > etmidr5 = etm4x_relaxed_read32(csa, TRCIDR5); > /* NUMEXTIN, bits[8:0] number of external inputs implemented */ > drvdata->nr_ext_inp = FIELD_GET(TRCIDR5_NUMEXTIN_MASK, etmidr5); > + drvdata->numextinsel = FIELD_GET(TRCIDR5_NUMEXTINSEL_MASK, etmidr5); > /* TRACEIDSIZE, bits[21:16] indicates the trace ID width */ > drvdata->trcid_size = FIELD_GET(TRCIDR5_TRACEIDSIZE_MASK, etmidr5); > /* ATBTRIG, bit[22] implementation can support ATB triggers? */ > @@ -1852,7 +1854,9 @@ static int __etm4_cpu_save(struct etmv4_drvdata *drvdata) > state->trcseqrstevr = etm4x_read32(csa, TRCSEQRSTEVR); > state->trcseqstr = etm4x_read32(csa, TRCSEQSTR); > } > - state->trcextinselr = etm4x_read32(csa, TRCEXTINSELR); > + > + if (drvdata->numextinsel) > + state->trcextinselr = etm4x_read32(csa, TRCEXTINSELR); > > for (i = 0; i < drvdata->nr_cntr; i++) { > state->trccntrldvr[i] = etm4x_read32(csa, TRCCNTRLDVRn(i)); > @@ -1984,7 +1988,8 @@ static void __etm4_cpu_restore(struct etmv4_drvdata *drvdata) > etm4x_relaxed_write32(csa, state->trcseqrstevr, TRCSEQRSTEVR); > etm4x_relaxed_write32(csa, state->trcseqstr, TRCSEQSTR); > } > - etm4x_relaxed_write32(csa, state->trcextinselr, TRCEXTINSELR); > + if (drvdata->numextinsel) > + etm4x_relaxed_write32(csa, state->trcextinselr, TRCEXTINSELR); > > for (i = 0; i < drvdata->nr_cntr; i++) { > etm4x_relaxed_write32(csa, state->trccntrldvr[i], TRCCNTRLDVRn(i)); > diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h > index ac649515054d905fa365203bd35f1d839b03292f..823914fefa90a36a328b652b0dc3828b9bddd990 100644 > --- a/drivers/hwtracing/coresight/coresight-etm4x.h > +++ b/drivers/hwtracing/coresight/coresight-etm4x.h > @@ -162,6 +162,7 @@ > #define TRCIDR4_NUMVMIDC_MASK GENMASK(31, 28) > > #define TRCIDR5_NUMEXTIN_MASK GENMASK(8, 0) > +#define TRCIDR5_NUMEXTINSEL_MASK GENMASK(11, 9) > #define TRCIDR5_TRACEIDSIZE_MASK GENMASK(21, 16) > #define TRCIDR5_ATBTRIG BIT(22) > #define TRCIDR5_LPOVERRIDE BIT(23) > @@ -999,6 +1000,7 @@ struct etmv4_drvdata { > u8 nr_cntr; > u8 nr_ext_inp; > u8 numcidc; > + u8 numextinsel; > u8 numvmidc; > u8 nrseqstate; > u8 nr_event; > > --- > base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 > change-id: 20250811-trcextinselr_issue-f267afa0e5ed > > Best regards,

3 days, 6 hours

[PATCH v2 0/6] coresight: Add format attribute for setting the timestamp interval

by James Clark

Do some cleanups then add a new format attribute to set the timestamp interval for ETMv4 in Perf mode. The current interval is too high for most use cases, and particularly on the FVP the number of timestamps generated is excessive. Although it would be good to make only SYNC timestamps the default and have counter timestamps opt-in, this would be a breaking change. We can always do that later, or disable counter timestamps from Perf. This is added as an event format attribute, rather than a Coresight config because it's something that the driver is already configuring automatically in Perf mode with any unused counter, so it's not possible to modify this with a config. Applies to coresight/next Signed-off-by: James Clark <james.clark(a)linaro.org> --- Changes in v2: - Only show the attribute for ETMv4 to improve usability and fix the arm32 build error. Wrapping everything in IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM4X) isn't ideal, but the -perf.c file is shared between ETMv3 and ETMv4, and there is already precedent for doing it this way. - Link to v1: https://lore.kernel.org/r/20250811-james-cs-syncfreq-v1-0-b001cd6e3404@lina… --- James Clark (6): coresight: Change syncfreq to be a u8 coresight: Fix holes in struct etmv4_config coresight: Repack struct etmv4_drvdata coresight: Refactor etm4_config_timestamp_event() coresight: Add format attribute for setting the timestamp interval coresight: docs: Document etm4x ts_interval Documentation/trace/coresight/coresight.rst | 14 +++ drivers/hwtracing/coresight/coresight-etm-perf.c | 13 ++- drivers/hwtracing/coresight/coresight-etm4x-core.c | 110 +++++++++++++-------- drivers/hwtracing/coresight/coresight-etm4x.h | 86 ++++++++++------ 4 files changed, 151 insertions(+), 72 deletions(-) --- base-commit: a80198ba650f50d266d7fc4a6c5262df9970f9f2 change-id: 20250724-james-cs-syncfreq-7c2257a38ed3 Best regards, -- James Clark <james.clark(a)linaro.org>

3 days, 6 hours

Re: [PATCH v2] coresight-etm4x: Conditionally access register TRCEXTINSELR

by James Clark

On 12/08/2025 9:24 am, Yuanfang Zhang wrote: > The TRCEXTINSELR is only implemented if TRCIDR5.NUMEXTINSEL > 0. > To avoid invalid accesses, introduce a check on numextinsel > (derived from TRCIDR5[11:9]) before reading or writing to this register. > > Fixes: f5bd523690d2 ("coresight: etm4x: Convert all register accesses") > Signed-off-by: Yuanfang Zhang <yuanfang.zhang(a)oss.qualcomm.com> > --- > Changes in v2: > - Add fixes tag. > - Replace "if (drvdata->nrseqstate)" with "if (drvdata->numextinsel)" > - Link to v1: https://lore.kernel.org/r/20250811-trcextinselr_issue-v1-1-ed78f3215502@oss… > --- > drivers/hwtracing/coresight/coresight-etm4x-core.c | 11 ++++++++--- > drivers/hwtracing/coresight/coresight-etm4x.h | 2 ++ > 2 files changed, 10 insertions(+), 3 deletions(-) > > diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c > index 42e5d37403addc6ec81f2e3184522d67d1677c04..4e411427303981104d11720d3c73af91030f8df3 100644 > --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c > +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c > @@ -528,7 +528,8 @@ static int etm4_enable_hw(struct etmv4_drvdata *drvdata) > etm4x_relaxed_write32(csa, config->seq_rst, TRCSEQRSTEVR); > etm4x_relaxed_write32(csa, config->seq_state, TRCSEQSTR); > } > - etm4x_relaxed_write32(csa, config->ext_inp, TRCEXTINSELR); > + if (drvdata->numextinsel) > + etm4x_relaxed_write32(csa, config->ext_inp, TRCEXTINSELR); > for (i = 0; i < drvdata->nr_cntr; i++) { > etm4x_relaxed_write32(csa, config->cntrldvr[i], TRCCNTRLDVRn(i)); > etm4x_relaxed_write32(csa, config->cntr_ctrl[i], TRCCNTCTLRn(i)); > @@ -1423,6 +1424,7 @@ static void etm4_init_arch_data(void *info) > etmidr5 = etm4x_relaxed_read32(csa, TRCIDR5); > /* NUMEXTIN, bits[8:0] number of external inputs implemented */ > drvdata->nr_ext_inp = FIELD_GET(TRCIDR5_NUMEXTIN_MASK, etmidr5); > + drvdata->numextinsel = FIELD_GET(TRCIDR5_NUMEXTINSEL_MASK, etmidr5); > /* TRACEIDSIZE, bits[21:16] indicates the trace ID width */ > drvdata->trcid_size = FIELD_GET(TRCIDR5_TRACEIDSIZE_MASK, etmidr5); > /* ATBTRIG, bit[22] implementation can support ATB triggers? */ > @@ -1852,7 +1854,9 @@ static int __etm4_cpu_save(struct etmv4_drvdata *drvdata) > state->trcseqrstevr = etm4x_read32(csa, TRCSEQRSTEVR); > state->trcseqstr = etm4x_read32(csa, TRCSEQSTR); > } > - state->trcextinselr = etm4x_read32(csa, TRCEXTINSELR); > + > + if (drvdata->numextinsel) > + state->trcextinselr = etm4x_read32(csa, TRCEXTINSELR); > > for (i = 0; i < drvdata->nr_cntr; i++) { > state->trccntrldvr[i] = etm4x_read32(csa, TRCCNTRLDVRn(i)); > @@ -1984,7 +1988,8 @@ static void __etm4_cpu_restore(struct etmv4_drvdata *drvdata) > etm4x_relaxed_write32(csa, state->trcseqrstevr, TRCSEQRSTEVR); > etm4x_relaxed_write32(csa, state->trcseqstr, TRCSEQSTR); > } > - etm4x_relaxed_write32(csa, state->trcextinselr, TRCEXTINSELR); > + if (drvdata->numextinsel) > + etm4x_relaxed_write32(csa, state->trcextinselr, TRCEXTINSELR); > > for (i = 0; i < drvdata->nr_cntr; i++) { > etm4x_relaxed_write32(csa, state->trccntrldvr[i], TRCCNTRLDVRn(i)); > diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h > index ac649515054d905fa365203bd35f1d839b03292f..823914fefa90a36a328b652b0dc3828b9bddd990 100644 > --- a/drivers/hwtracing/coresight/coresight-etm4x.h > +++ b/drivers/hwtracing/coresight/coresight-etm4x.h > @@ -162,6 +162,7 @@ > #define TRCIDR4_NUMVMIDC_MASK GENMASK(31, 28) > > #define TRCIDR5_NUMEXTIN_MASK GENMASK(8, 0) > +#define TRCIDR5_NUMEXTINSEL_MASK GENMASK(11, 9) > #define TRCIDR5_TRACEIDSIZE_MASK GENMASK(21, 16) > #define TRCIDR5_ATBTRIG BIT(22) > #define TRCIDR5_LPOVERRIDE BIT(23) > @@ -999,6 +1000,7 @@ struct etmv4_drvdata { > u8 nr_cntr; > u8 nr_ext_inp; > u8 numcidc; > + u8 numextinsel; > u8 numvmidc; > u8 nrseqstate; > u8 nr_event; > > --- > base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 > change-id: 20250811-trcextinselr_issue-f267afa0e5ed > > Best regards, Reviewed-by: James Clark <james.clark(a)linaro.org>

3 days, 8 hours

[PATCH] coresight: tnoc: add new AMBA ID to support Trace Noc V2

by Yuanfang Zhang

Add the new AMBA ID 0x001f0c00 to support Trace Noc V2 instances. Signed-off-by: Yuanfang Zhang <yuanfang.zhang(a)oss.qualcomm.com> --- drivers/hwtracing/coresight/coresight-tnoc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight-tnoc.c b/drivers/hwtracing/coresight/coresight-tnoc.c index d542df46ea39314605290311f683010337bfd4bd..ff9a0a9cfe96e5f5e3077c750ea2f890cdd50d94 100644 --- a/drivers/hwtracing/coresight/coresight-tnoc.c +++ b/drivers/hwtracing/coresight/coresight-tnoc.c @@ -222,6 +222,10 @@ static struct amba_id trace_noc_ids[] = { .id = 0x000f0c00, .mask = 0x00ffff00, }, + { + .id = 0x001f0c00, + .mask = 0x00ffff00, + }, {}, }; MODULE_DEVICE_TABLE(amba, trace_noc_ids); --- base-commit: a80198ba650f50d266d7fc4a6c5262df9970f9f2 change-id: 20250814-tnoc_v2-ec86ebebf62e Best regards, -- Yuanfang Zhang <yuanfang.zhang(a)oss.qualcomm.com>

3 days, 8 hours

Re: [PATCH] coresight-etm4x: Conditionally access register TRCEXTINSELR

by James Clark

On 11/08/2025 10:57 am, Yuanfang Zhang wrote: > The TRCEXTINSELR is only implemented if TRCIDR5.NUMEXTINSEL > 0. > To avoid invalid accesses, introduce a check on numextinsel > (derived from TRCIDR5[11:9]) before reading or writing to this register. > Looks like this should have a fixes: tag. > Signed-off-by: Yuanfang Zhang <yuanfang.zhang(a)oss.qualcomm.com> > --- > drivers/hwtracing/coresight/coresight-etm4x-core.c | 11 ++++++++--- > drivers/hwtracing/coresight/coresight-etm4x.h | 2 ++ > 2 files changed, 10 insertions(+), 3 deletions(-) > > diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c > index 42e5d37403addc6ec81f2e3184522d67d1677c04..8a9c4caceff0165e4fce7ac4250f3e16ccc1d34e 100644 > --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c > +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c > @@ -528,7 +528,8 @@ static int etm4_enable_hw(struct etmv4_drvdata *drvdata) > etm4x_relaxed_write32(csa, config->seq_rst, TRCSEQRSTEVR); > etm4x_relaxed_write32(csa, config->seq_state, TRCSEQSTR); > } > - etm4x_relaxed_write32(csa, config->ext_inp, TRCEXTINSELR); > + if (drvdata->numextinsel) > + etm4x_relaxed_write32(csa, config->ext_inp, TRCEXTINSELR); > for (i = 0; i < drvdata->nr_cntr; i++) { > etm4x_relaxed_write32(csa, config->cntrldvr[i], TRCCNTRLDVRn(i)); > etm4x_relaxed_write32(csa, config->cntr_ctrl[i], TRCCNTCTLRn(i)); > @@ -1423,6 +1424,7 @@ static void etm4_init_arch_data(void *info) > etmidr5 = etm4x_relaxed_read32(csa, TRCIDR5); > /* NUMEXTIN, bits[8:0] number of external inputs implemented */ > drvdata->nr_ext_inp = FIELD_GET(TRCIDR5_NUMEXTIN_MASK, etmidr5); > + drvdata->numextinsel = FIELD_GET(TRCIDR5_NUMEXTINSEL_MASK, etmidr5); > /* TRACEIDSIZE, bits[21:16] indicates the trace ID width */ > drvdata->trcid_size = FIELD_GET(TRCIDR5_TRACEIDSIZE_MASK, etmidr5); > /* ATBTRIG, bit[22] implementation can support ATB triggers? */ > @@ -1852,7 +1854,9 @@ static int __etm4_cpu_save(struct etmv4_drvdata *drvdata) > state->trcseqrstevr = etm4x_read32(csa, TRCSEQRSTEVR); > state->trcseqstr = etm4x_read32(csa, TRCSEQSTR); > } > - state->trcextinselr = etm4x_read32(csa, TRCEXTINSELR); > + > + if (drvdata->nrseqstate) Shouldn't this be "if (drvdata->numextinsel)"? Or it needs a comment saying why it's different to the others. Otherwise looks ok. > + state->trcextinselr = etm4x_read32(csa, TRCEXTINSELR); > > for (i = 0; i < drvdata->nr_cntr; i++) { > state->trccntrldvr[i] = etm4x_read32(csa, TRCCNTRLDVRn(i)); > @@ -1984,7 +1988,8 @@ static void __etm4_cpu_restore(struct etmv4_drvdata *drvdata) > etm4x_relaxed_write32(csa, state->trcseqrstevr, TRCSEQRSTEVR); > etm4x_relaxed_write32(csa, state->trcseqstr, TRCSEQSTR); > } > - etm4x_relaxed_write32(csa, state->trcextinselr, TRCEXTINSELR); > + if (drvdata->numextinsel) > + etm4x_relaxed_write32(csa, state->trcextinselr, TRCEXTINSELR); > > for (i = 0; i < drvdata->nr_cntr; i++) { > etm4x_relaxed_write32(csa, state->trccntrldvr[i], TRCCNTRLDVRn(i)); > diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h > index ac649515054d905fa365203bd35f1d839b03292f..823914fefa90a36a328b652b0dc3828b9bddd990 100644 > --- a/drivers/hwtracing/coresight/coresight-etm4x.h > +++ b/drivers/hwtracing/coresight/coresight-etm4x.h > @@ -162,6 +162,7 @@ > #define TRCIDR4_NUMVMIDC_MASK GENMASK(31, 28) > > #define TRCIDR5_NUMEXTIN_MASK GENMASK(8, 0) > +#define TRCIDR5_NUMEXTINSEL_MASK GENMASK(11, 9) > #define TRCIDR5_TRACEIDSIZE_MASK GENMASK(21, 16) > #define TRCIDR5_ATBTRIG BIT(22) > #define TRCIDR5_LPOVERRIDE BIT(23) > @@ -999,6 +1000,7 @@ struct etmv4_drvdata { > u8 nr_cntr; > u8 nr_ext_inp; > u8 numcidc; > + u8 numextinsel; > u8 numvmidc; > u8 nrseqstate; > u8 nr_event; > > --- > base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 > change-id: 20250811-trcextinselr_issue-f267afa0e5ed > > Best regards,

6 days, 7 hours

Re: [PATCH v1] coresight: tpda: fix the logic to setup the element size

by James Clark

On 06/08/2025 9:09 am, Jie Gan wrote: > Some TPDM devices support both CMB and DSB datasets, requiring > the system to enable the port with both corresponding element sizes. > > Currently, the logic treats tpdm_read_element_size as successful if > the CMB element size is retrieved correctly, regardless of whether > the DSB element size is obtained. This behavior causes issues > when parsing data from TPDM devices that depend on both element sizes. > > To address this, the function should explicitly fail if the DSB > element size cannot be read correctly. > > Fixes: e6d7f5252f73 ("coresight-tpda: Add support to configure CMB element") > Signed-off-by: Jie Gan <jie.gan(a)oss.qualcomm.com> > --- > drivers/hwtracing/coresight/coresight-tpda.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtracing/coresight/coresight-tpda.c > index 0633f04beb24..333b3cb23685 100644 > --- a/drivers/hwtracing/coresight/coresight-tpda.c > +++ b/drivers/hwtracing/coresight/coresight-tpda.c > @@ -71,6 +71,8 @@ static int tpdm_read_element_size(struct tpda_drvdata *drvdata, > if (tpdm_data->dsb) { > rc = fwnode_property_read_u32(dev_fwnode(csdev->dev.parent), > "qcom,dsb-element-bits", &drvdata->dsb_esize); > + if (rc) > + goto out; > } > > if (tpdm_data->cmb) { > @@ -78,6 +80,7 @@ static int tpdm_read_element_size(struct tpda_drvdata *drvdata, > "qcom,cmb-element-bits", &drvdata->cmb_esize); > } > > +out: > if (rc) > dev_warn_once(&csdev->dev, > "Failed to read TPDM Element size: %d\n", rc); Reviewed-by: James Clark <james.clark(a)linaro.org>

1 week, 4 days

[PATCH v10 0/2] coresight: Add label sysfs node support

by Mao Jinlong

Change since V9: 1. Replace scnprintf with sysfs_emit. 2. Update date in ABI files. V9 link: https://lkml.org/lkml/2025/7/17/832 Change since V8: 1. Add label in all documentations of coresight components. 2. Add control of the visibility of the label sysfs attribute. V8 link: https://lkml.org/lkml/2025/7/3/985 Change since V7: 1. Update the conflict when apply to coresight next. 2. Update the Date and version in ABI file. V7 link: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20250226121926.… Change since V6: 1. Update the date and version in ABI file. Change since V5: 1. Update the kernel version of ABI files. 2. Add link of different patch versions. V5 link: https://patchwork.kernel.org/project/linux-arm-msm/cover/20241210122253.319… Change since V4: 1. Add label in DT and add label sysfs node for each coresight device. V4 link: https://patchwork.kernel.org/project/linux-arm-msm/cover/20240703122340.268… 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. V3 link: https://patchwork.kernel.org/project/linux-arm-msm/cover/20240131082628.628… 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 V2 link: https://patchwork.kernel.org/project/linux-arm-msm/cover/20240115164252.265… Change since V1: 1. Change coresight-name to device name. 2. Add the device-name in coresight dt bindings. V1 link: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20230208110716.… Mao Jinlong (2): dt-bindings: arm: Add label in the coresight components coresight: Add label sysfs node support .../testing/sysfs-bus-coresight-devices-cti | 6 ++ .../sysfs-bus-coresight-devices-dummy-source | 6 ++ .../testing/sysfs-bus-coresight-devices-etb10 | 6 ++ .../testing/sysfs-bus-coresight-devices-etm3x | 6 ++ .../testing/sysfs-bus-coresight-devices-etm4x | 6 ++ .../sysfs-bus-coresight-devices-funnel | 6 ++ .../testing/sysfs-bus-coresight-devices-stm | 6 ++ .../testing/sysfs-bus-coresight-devices-tmc | 6 ++ .../testing/sysfs-bus-coresight-devices-tpdm | 6 ++ .../testing/sysfs-bus-coresight-devices-trbe | 6 ++ .../bindings/arm/arm,coresight-cti.yaml | 4 ++ .../arm/arm,coresight-dummy-sink.yaml | 4 ++ .../arm/arm,coresight-dummy-source.yaml | 4 ++ .../arm/arm,coresight-dynamic-funnel.yaml | 4 ++ .../arm/arm,coresight-dynamic-replicator.yaml | 4 ++ .../bindings/arm/arm,coresight-etb10.yaml | 4 ++ .../bindings/arm/arm,coresight-etm.yaml | 4 ++ .../arm/arm,coresight-static-funnel.yaml | 4 ++ .../arm/arm,coresight-static-replicator.yaml | 4 ++ .../bindings/arm/arm,coresight-tmc.yaml | 4 ++ .../bindings/arm/arm,coresight-tpiu.yaml | 4 ++ .../bindings/arm/qcom,coresight-ctcu.yaml | 4 ++ .../arm/qcom,coresight-remote-etm.yaml | 4 ++ .../bindings/arm/qcom,coresight-tpda.yaml | 4 ++ .../bindings/arm/qcom,coresight-tpdm.yaml | 4 ++ drivers/hwtracing/coresight/coresight-sysfs.c | 71 ++++++++++++++++++- 26 files changed, 189 insertions(+), 2 deletions(-) -- 2.25.1

1 week, 4 days

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