CoreSight February 2023

coresight@lists.linaro.org

6 participants
16 discussions

[PATCH] coresight: core: Add coresight name support

by Mao Jinlong

Apart from STM and ETM sources, there will be more sources added to coresight components. For example, there are over 10 TPDM sources. Add coresight name support for custom names which will be easy to identify the source. Signed-off-by: Mao Jinlong <quic_jinlmao(a)quicinc.com> --- drivers/hwtracing/coresight/coresight-core.c | 34 +++++++++++--------- 1 file changed, 19 insertions(+), 15 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index d3bf82c0de1d..5e95d9c7f256 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -1733,28 +1733,32 @@ char *coresight_alloc_device_name(struct coresight_dev_list *dict, { int idx; char *name = NULL; + const char *coresight_name = NULL; struct fwnode_handle **list; + struct device_node *node = dev->of_node; mutex_lock(&coresight_mutex); - idx = coresight_search_device_idx(dict, dev_fwnode(dev)); - if (idx < 0) { - /* Make space for the new entry */ - idx = dict->nr_idx; - list = krealloc_array(dict->fwnode_list, - idx + 1, sizeof(*dict->fwnode_list), - GFP_KERNEL); - if (ZERO_OR_NULL_PTR(list)) { - idx = -ENOMEM; - goto done; + if (!of_property_read_string(node, "coresight-name", &coresight_name)) + name = devm_kasprintf(dev, GFP_KERNEL, "%s", coresight_name); + else { + idx = coresight_search_device_idx(dict, dev_fwnode(dev)); + if (idx < 0) { + /* Make space for the new entry */ + idx = dict->nr_idx; + list = krealloc_array(dict->fwnode_list, + idx + 1, sizeof(*dict->fwnode_list), + GFP_KERNEL); + if (ZERO_OR_NULL_PTR(list)) + goto done; + + list[idx] = dev_fwnode(dev); + dict->fwnode_list = list; + dict->nr_idx = idx + 1; } - list[idx] = dev_fwnode(dev); - dict->fwnode_list = list; - dict->nr_idx = idx + 1; + name = devm_kasprintf(dev, GFP_KERNEL, "%s%d", dict->pfx, idx); } - - name = devm_kasprintf(dev, GFP_KERNEL, "%s%d", dict->pfx, idx); done: mutex_unlock(&coresight_mutex); return name; -- 2.39.0

1 year, 6 months

[PATCH] coresight: core: Add sysfs node to reset all sources and sinks

by Mao Jinlong

Add sysfs node to reset all the sources and sinks. When mltiple sources are enabled, write 1 to reset_source_sink node to disable all sources and sinks. Signed-off-by: Mao Jinlong <quic_jinlmao(a)quicinc.com> --- drivers/hwtracing/coresight/coresight-core.c | 106 +++++++++++++++++-- 1 file changed, 99 insertions(+), 7 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index d3bf82c0de1d..06741ed2dee7 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -458,6 +458,28 @@ static bool coresight_disable_source(struct coresight_device *csdev) return !csdev->enable; } +/** + * coresight_get_source - Get the source from the path + * + * @path: The list of devices. + * + * Returns the soruce csdev. + * + */ +static struct coresight_device *coresight_get_source(struct list_head *path) +{ + struct coresight_device *csdev; + + if (!path) + return NULL; + + csdev = list_first_entry(path, struct coresight_node, link)->csdev; + if (csdev->type != CORESIGHT_DEV_TYPE_SOURCE) + return NULL; + + return csdev; +} + /* * coresight_disable_path_from : Disable components in the given path beyond * @nd in the list. If @nd is NULL, all the components, except the SOURCE are @@ -1159,20 +1181,18 @@ int coresight_enable(struct coresight_device *csdev) } EXPORT_SYMBOL_GPL(coresight_enable); -void coresight_disable(struct coresight_device *csdev) +static void _coresight_disable(struct coresight_device *csdev) { int cpu, ret; struct list_head *path = NULL; u32 hash; - mutex_lock(&coresight_mutex); - ret = coresight_validate_source(csdev, __func__); if (ret) - goto out; + return; if (!csdev->enable || !coresight_disable_source(csdev)) - goto out; + return; switch (csdev->subtype.source_subtype) { case CORESIGHT_DEV_SUBTYPE_SOURCE_PROC: @@ -1187,7 +1207,7 @@ void coresight_disable(struct coresight_device *csdev) path = idr_find(&path_idr, hash); if (path == NULL) { pr_err("Path is not found for %s\n", dev_name(&csdev->dev)); - goto out; + return; } idr_remove(&path_idr, hash); break; @@ -1198,8 +1218,12 @@ void coresight_disable(struct coresight_device *csdev) coresight_disable_path(path); coresight_release_path(path); +} -out: +void coresight_disable(struct coresight_device *csdev) +{ + mutex_lock(&coresight_mutex); + _coresight_disable(csdev); mutex_unlock(&coresight_mutex); } EXPORT_SYMBOL_GPL(coresight_disable); @@ -1761,8 +1785,76 @@ char *coresight_alloc_device_name(struct coresight_dev_list *dict, } EXPORT_SYMBOL_GPL(coresight_alloc_device_name); +/* + * Set the sink active status to false. + */ +static int coresight_reset_sink(struct device *dev, void *data) +{ + struct coresight_device *csdev = to_coresight_device(dev); + + if ((csdev->type == CORESIGHT_DEV_TYPE_SINK || + csdev->type == CORESIGHT_DEV_TYPE_LINKSINK) && + csdev->activated) + csdev->activated = false; + + return 0; +} + +static void coresight_reset_all_sink(void) +{ + bus_for_each_dev(&coresight_bustype, NULL, NULL, coresight_reset_sink); +} + +static ssize_t reset_source_sink_store(struct bus_type *bus, + const char *buf, size_t size) +{ + int id, cpu, ret = 0; + unsigned long val; + struct coresight_device *csdev; + struct list_head *path = NULL; + + ret = kstrtoul(buf, 10, &val); + if (ret) + return ret; + + mutex_lock(&coresight_mutex); + + /* Disable all per cpu sources */ + for_each_present_cpu(cpu) { + path = per_cpu(tracer_path, cpu); + if (path) { + csdev = coresight_get_source(path); + if (!csdev) + continue; + } + _coresight_disable(csdev); + } + + /* Disable all sources which aren't associated with CPU */ + idr_for_each_entry (&path_idr, path, id) { + csdev = coresight_get_source(path); + if (!csdev) + continue; + + _coresight_disable(csdev); + } + /* Reset all activated sinks */ + coresight_reset_all_sink(); + + mutex_unlock(&coresight_mutex); + return size; +} +static BUS_ATTR_WO(reset_source_sink); + +static struct attribute *coresight_reset_source_sink_attrs[] = { + &bus_attr_reset_source_sink.attr, + NULL, +}; +ATTRIBUTE_GROUPS(coresight_reset_source_sink); + struct bus_type coresight_bustype = { .name = "coresight", + .bus_groups = coresight_reset_source_sink_groups, }; static int __init coresight_init(void) -- 2.39.0

1 year, 8 months

Re: [PATCH 2/3] coresight etm4x: Add 32-bit read/write option to split 64-bit words

by Suzuki K Poulose

On 20/01/2023 00:51, Steve Clevenger wrote: > Add 32-bit read/write access option for Ampere ETMv4.6 64-bit registers. > Ampere Computing erratum AC03_DEBUG_10 describes a design decision where > 64-bit read/write access is not supported for the ETMv4.6 implementation. > These 64-bit registers must be accessed as 2 ea. 32-bit registers. > AC03_DEBUG_10 is described in the AmpereOne Developer Errata: > https://solutions.amperecomputing.com/customer-connect/products/AmpereOne-d… As with the previous comment, please : a) If this is because of the system instruction access support b) Document the erratum > > Fix drvdata->nr_addr_cmp for() loop range bug to drvdata->nr_addr_cmp * 2 > in etm_enable_hw. Good catch ! Please separate this out and send it as a fix. I can queue this. > > Signed-off-by: Steve Clevenger <scclevenger(a)os.amperecomputing.com> > --- > .../coresight/coresight-etm4x-core.c | 81 ++++++++++++++----- > drivers/hwtracing/coresight/coresight-etm4x.h | 32 ++++++++ > 2 files changed, 93 insertions(+), 20 deletions(-) > > diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c > index 533be1928a09..bf4daa649cdf 100644 > --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c > +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c > @@ -452,18 +452,31 @@ static int etm4_enable_hw(struct etmv4_drvdata *drvdata) > if (etm4x_sspcicrn_present(drvdata, i)) > etm4x_relaxed_write32(csa, config->ss_pe_cmp[i], TRCSSPCICRn(i)); > } > - for (i = 0; i < drvdata->nr_addr_cmp; i++) { > - etm4x_relaxed_write64(csa, config->addr_val[i], TRCACVRn(i)); > - etm4x_relaxed_write64(csa, config->addr_acc[i], TRCACATRn(i)); > + for (i = 0; i < drvdata->nr_addr_cmp * 2; i++) { > + if (drvdata->no_quad_mmio) { > + etm4x_split_write64(csa, config->addr_val[i], TRCACVRn(i)); > + etm4x_split_write64(csa, config->addr_acc[i], TRCACATRn(i)); > + } else { > + etm4x_relaxed_write64(csa, config->addr_val[i], TRCACVRn(i)); > + etm4x_relaxed_write64(csa, config->addr_acc[i], TRCACATRn(i)); > + } > + } Something like this can be leave some places out. I think we could hide it under the generic helpers and handle it there. May be "struct csdev_access" can cache this "no_quad_mmio" and do the right thing ? > + for (i = 0; i < drvdata->numcidc; i++) { > + if (drvdata->no_quad_mmio) > + etm4x_split_write64(csa, config->ctxid_pid[i], TRCCIDCVRn(i)); > + else > + etm4x_relaxed_write64(csa, config->ctxid_pid[i], TRCCIDCVRn(i)); > } > - for (i = 0; i < drvdata->numcidc; i++) > - etm4x_relaxed_write64(csa, config->ctxid_pid[i], TRCCIDCVRn(i)); > etm4x_relaxed_write32(csa, config->ctxid_mask0, TRCCIDCCTLR0); > if (drvdata->numcidc > 4) > etm4x_relaxed_write32(csa, config->ctxid_mask1, TRCCIDCCTLR1); > > - for (i = 0; i < drvdata->numvmidc; i++) > - etm4x_relaxed_write64(csa, config->vmid_val[i], TRCVMIDCVRn(i)); > + for (i = 0; i < drvdata->numvmidc; i++) { > + if (drvdata->no_quad_mmio) > + etm4x_split_write64(csa, config->vmid_val[i], TRCVMIDCVRn(i)); > + else > + etm4x_relaxed_write64(csa, config->vmid_val[i], TRCVMIDCVRn(i)); > + } > etm4x_relaxed_write32(csa, config->vmid_mask0, TRCVMIDCCTLR0); > if (drvdata->numvmidc > 4) > etm4x_relaxed_write32(csa, config->vmid_mask1, TRCVMIDCCTLR1); > @@ -1670,8 +1683,13 @@ static int __etm4_cpu_save(struct etmv4_drvdata *drvdata) > } > > for (i = 0; i < drvdata->nr_addr_cmp * 2; i++) { > - state->trcacvr[i] = etm4x_read64(csa, TRCACVRn(i)); > - state->trcacatr[i] = etm4x_read64(csa, TRCACATRn(i)); > + if (drvdata->no_quad_mmio) { > + state->trcacvr[i] = etm4x_split_read64(csa, TRCACVRn(i)); > + state->trcacatr[i] = etm4x_split_read64(csa, TRCACATRn(i)); > + } else { > + state->trcacvr[i] = etm4x_read64(csa, TRCACVRn(i)); > + state->trcacatr[i] = etm4x_read64(csa, TRCACATRn(i)); > + } > } > > /* > @@ -1681,11 +1699,19 @@ static int __etm4_cpu_save(struct etmv4_drvdata *drvdata) > * unit") of ARM IHI 0064D. > */ > > - for (i = 0; i < drvdata->numcidc; i++) > - state->trccidcvr[i] = etm4x_read64(csa, TRCCIDCVRn(i)); > + for (i = 0; i < drvdata->numcidc; i++) { > + if (drvdata->no_quad_mmio) > + state->trccidcvr[i] = etm4x_split_read64(csa, TRCCIDCVRn(i)); > + else > + state->trccidcvr[i] = etm4x_read64(csa, TRCCIDCVRn(i)); > + } > > - for (i = 0; i < drvdata->numvmidc; i++) > - state->trcvmidcvr[i] = etm4x_read64(csa, TRCVMIDCVRn(i)); > + for (i = 0; i < drvdata->numvmidc; i++) { > + if (drvdata->no_quad_mmio) > + state->trcvmidcvr[i] = etm4x_split_read64(csa, TRCVMIDCVRn(i)); > + else > + state->trcvmidcvr[i] = etm4x_read64(csa, TRCVMIDCVRn(i)); > + } > > state->trccidcctlr0 = etm4x_read32(csa, TRCCIDCCTLR0); > if (drvdata->numcidc > 4) > @@ -1799,15 +1825,28 @@ static void __etm4_cpu_restore(struct etmv4_drvdata *drvdata) > } > > for (i = 0; i < drvdata->nr_addr_cmp * 2; i++) { > - etm4x_relaxed_write64(csa, state->trcacvr[i], TRCACVRn(i)); > - etm4x_relaxed_write64(csa, state->trcacatr[i], TRCACATRn(i)); > + if (drvdata->no_quad_mmio) { > + etm4x_split_write64(csa, state->trcacvr[i], TRCACVRn(i)); > + etm4x_split_write64(csa, state->trcacatr[i], TRCACATRn(i)); > + } else { > + etm4x_relaxed_write64(csa, state->trcacvr[i], TRCACVRn(i)); > + etm4x_relaxed_write64(csa, state->trcacatr[i], TRCACATRn(i)); > + } > } > > - for (i = 0; i < drvdata->numcidc; i++) > - etm4x_relaxed_write64(csa, state->trccidcvr[i], TRCCIDCVRn(i)); > + for (i = 0; i < drvdata->numcidc; i++) { > + if (drvdata->no_quad_mmio) > + etm4x_split_write64(csa, state->trccidcvr[i], TRCCIDCVRn(i)); > + else > + etm4x_relaxed_write64(csa, state->trccidcvr[i], TRCCIDCVRn(i)); > + } > > - for (i = 0; i < drvdata->numvmidc; i++) > - etm4x_relaxed_write64(csa, state->trcvmidcvr[i], TRCVMIDCVRn(i)); > + for (i = 0; i < drvdata->numvmidc; i++) { > + if (drvdata->no_quad_mmio) > + etm4x_split_write64(csa, state->trcvmidcvr[i], TRCVMIDCVRn(i)); > + else > + etm4x_relaxed_write64(csa, state->trcvmidcvr[i], TRCVMIDCVRn(i)); > + } > > etm4x_relaxed_write32(csa, state->trccidcctlr0, TRCCIDCCTLR0); > if (drvdata->numcidc > 4) > @@ -2047,8 +2086,10 @@ static int etm4_probe(struct device *dev, void __iomem *base, u32 etm_pid) > * isolates the manufacturer JEP106 ID in the PID. > * TRCPIDR2 (JEDC|DES_1) << 16 | TRCPIDR1 (DES_0) << 8) > */ > - if ((init_arg.pid & 0x000FF000) == 0x00096000) > + if ((init_arg.pid & 0x000FF000) == 0x00096000) { > drvdata->mmio_external = true; > + drvdata->no_quad_mmio = true; > + } > > /* > * Serialize against CPUHP callbacks to avoid race condition > diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h > index cf4f9f2e1807..0650bcdff410 100644 > --- a/drivers/hwtracing/coresight/coresight-etm4x.h > +++ b/drivers/hwtracing/coresight/coresight-etm4x.h > @@ -1016,6 +1016,7 @@ struct etmv4_save_state { > * the trace unit. > * @arch_features: Bitmap of arch features of etmv4 devices. > * @mmio_external: True if ETM considers MMIO an external access. > + * @no_quad_mmio: True if ETM does not support 64-bit (quad) access. > */ > struct etmv4_drvdata { > void __iomem *base; > @@ -1069,6 +1070,7 @@ struct etmv4_drvdata { > bool skip_power_up; > DECLARE_BITMAP(arch_features, ETM4_IMPDEF_FEATURE_MAX); > bool mmio_external; > + bool no_quad_mmio; > }; > > /* Address comparator access types */ > @@ -1093,6 +1095,36 @@ void etm4_config_trace_mode(struct etmv4_config *config); > u64 etm4x_sysreg_read(u32 offset, bool _relaxed, bool _64bit); > void etm4x_sysreg_write(u64 val, u32 offset, bool _relaxed, bool _64bit); > > +/* 64-bit aligned to convert 64-bit access to 2 ea. 32-bit access */ > +#pragma pack(push, 8) > + > +struct etm_quad_split { > + u32 lsw; > + u32 msw; > +}; > + > +#pragma pack(pop) > + > +static inline u64 etm4x_split_read64(struct csdev_access *csa, unsigned int offset) > +{ > + struct etm_quad_split container; > + > + container.lsw = etm4x_read32(csa, offset); > + container.msw = etm4x_read32(csa, offset + sizeof(u32)); > + > + return *(u64 *) &container; Wouldn't this break with the "endianness" flip ? (Not that we have BE implementations). Could we not combine the two values to a 64bit value and pass that instead ? Similarly below. Suzuki > +} > + > +static inline void etm4x_split_write64(struct csdev_access *csa, u64 quad, unsigned int offset) > +{ > + struct etm_quad_split container; > + > + *(u64 *) &container = quad; > + > + etm4x_relaxed_write32(csa, container.lsw, offset); > + etm4x_relaxed_write32(csa, container.msw, offset + sizeof(u32)); > +} > + > static inline bool etm4x_is_ete(struct etmv4_drvdata *drvdata) > { > return drvdata->arch >= ETM_ARCH_ETE;

1 year, 8 months

[PATCH v2 0/9] Add support to configure TPDM DSB subunit

by Tao Zhang

From: Tao Zhang <taozha(a)qti.qualcomm.com> Introduction of TPDM DSB subunit DSB subunit is responsible for creating a dataset element, and is also optionally responsible for packing it to fit multiple elements on a single ATB transfer if possible in the configuration. The TPDM Core Datapath requests timestamps be stored by the TPDA and then delivering ATB sized data (depending on ATB width and element size, this could be smaller or larger than a dataset element) to the ATB Mast FSM. The DSB subunit must be configured prior to enablement. This series adds support for TPDM to configure the configure DSB 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 DSB subunit. e.g. /sys/devices/platform/soc(a)0/69d0000.tpdm/tpdm0#ls -l | grep dsb -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_edge_ctrl -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_edge_ctrl_mask -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_mode -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_patt_mask -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_patt_ts -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_patt_type -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_patt_val -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_trig_patt_mask -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_trig_patt_val -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_trig_ts -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_trig_type We can use the commands are similar to the below to configure the TPDMs which support DSB subunit. Enable coresight sink first. echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink echo 1 > /sys/bus/coresight/devices/tpdm0/reset echo 0x3 0x3 0x1 > /sys/bus/coresight/devices/tpdm0/dsb_edge_ctrl_mask echo 0x6d 0x6d 0 > /sys/bus/coresight/devices/tpdm0/dsb_edge_ctrl echo 1 > /sys/bus/coresight/devices/tpdm0/dsb_patt_ts echo 1 > /sys/bus/coresight/devices/tpdm0/dsb_patt_type echo 0 > /sys/bus/coresight/devices/tpdm0/dsb_trig_ts echo 0 0xFFFFFFFF > /sys/bus/coresight/devices/tpdm0/dsb_patt_mask echo 0 0xFFFFFFFF > /sys/bus/coresight/devices/tpdm0/dsb_trig_patt_val This patch series depends on patch series "[v17,0/9] Coresight: Add support for TPDM and TPDA" https://patchwork.kernel.org/project/linux-arm-msm/cover/20230117145708.167… TPDM_DSB commit tree: https://git.codelinaro.org/clo/linux-kernel/coresight/-/tree/tpdm-dsb-v2 https://git.codelinaro.org/clo/linux-kernel/coresight/-/commits/tpdm-dsb-v2 Changes in V2: 1. Change the name of the property "qcom,dsb-elem-size" to "qcom,dsb-element-size" -- Suzuki K Poulose 2. Update the TPDA yaml file for the item "qcom,dsb-elem-size". -- Krzysztof Kozlowski 3. Add the full name of DSB in the description of the item "qcom,dsb-elem-size". -- Rob Herring Changes in V1: 1. Change the definition of the property "qcom,dsb-elem-size" from "uint32-array" to "uint32-matrix". -- Krzysztof Kozlowski 2. Add the full name of DSB. -- Rob Herring 3. Deal with 2 entries in an iteration in TPDA driver. -- Suzuki K Poulose 4. Divide the function "tpdm_datasets_alloc" into two functions, "tpdm_datasets_setup" and "tpdm_datasets_alloc". 5. Detecte the input string with the conventional semantics automatically, and constrain the size of the input value. -- Suzuki K Poulose 6. Use the hook function "is_visible()" to hide the DSB related knobs if the data sets are missing. -- Suzuki K Poulose 7. Use the macros "FIELD_GET" and "FIELD_PREP" to set the values. -- Suzuki K Poulose 8. Update the definition of the macros in TPDM driver. 9. Update the comments of the values for the nodes which are for DSB element creation and onfigure pattern match output. -- Suzuki K Poulose 10. Use API "sysfs_emit" to "replace scnprintf". -- Suzuki K Poulose Tao Zhang (9): dt-bindings: arm: Add support for DSB element coresight-tpda: Add DSB dataset support coresight-tpdm: Initialize DSB subunit configuration coresight-tpdm: Add reset node to TPDM node coresight-tpdm: Add nodes to set trigger timestamp and type coresight-tpdm: Add node to set dsb programming mode coresight-tpdm: Add nodes for dsb element creation coresight-tpdm: Add nodes to configure pattern match output coresight-tpdm: Add nodes for timestamp request .../bindings/arm/qcom,coresight-tpda.yaml | 22 + drivers/hwtracing/coresight/coresight-tpda.c | 62 ++ drivers/hwtracing/coresight/coresight-tpda.h | 4 + drivers/hwtracing/coresight/coresight-tpdm.c | 630 ++++++++++++++++++++- drivers/hwtracing/coresight/coresight-tpdm.h | 65 +++ 5 files changed, 778 insertions(+), 5 deletions(-) -- 2.7.4

1 year, 8 months

Re: [PATCH] coresight-etm4: Fix for() loop drvdata->nr_addr_cmp range bug

by James Clark

On 27/02/2023 23:54, Steve Clevenger wrote: > In etm4_enable_hw, fix for() loop range to represent address comparator pairs. > > Signed-off-by: Steve Clevenger <scclevenger(a)os.amperecomputing.com> > --- > drivers/hwtracing/coresight/coresight-etm4x-core.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c > index 1ea8f173cca0..104333c2c8a3 100644 > --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c > +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c > @@ -472,7 +472,7 @@ static int etm4_enable_hw(struct etmv4_drvdata *drvdata) > if (etm4x_sspcicrn_present(drvdata, i)) > etm4x_relaxed_write32(csa, config->ss_pe_cmp[i], TRCSSPCICRn(i)); > } > - for (i = 0; i < drvdata->nr_addr_cmp; i++) { > + for (i = 0; i < drvdata->nr_addr_cmp * 2; i++) { > etm4x_relaxed_write64(csa, config->addr_val[i], TRCACVRn(i)); > etm4x_relaxed_write64(csa, config->addr_acc[i], TRCACATRn(i)); > } Reviewed-by: James Clark <james.clark(a)arm.com> Are there other ones in coresight-etm3x-sysfs.c:reset_store() and coresight-etm3x-core.c:etm_enable_hw()? Or is etm3 different?

1 year, 8 months

Re: A question about CTI code, need help to answer

by Mike Leach

Hi, On Mon, 27 Feb 2023 at 06:20, Tao Zhang <quic_taozha(a)quicinc.com> wrote: > > Hi Mike, > > 在 2/24/2023 11:43 PM, Tao Zhang 写道: > > Hi Mike, > > > > > > I have a question about the following code you promoted. > > > > Patch - coresight: cti: Add device tree support for v8 arch CTI > > > > You set the following mask variables in the function > > "cti_plat_create_v8_connections". > > > > tc->con_in->used_mask = 0x3; /* sigs <0 1> */ > > > > tc->con_out->used_mask = 0x7; /* sigs <0 1 2 > */ > > > > Could you tell us why they should be set to 0x3 and 0x7 here? > > > > Is there any particular reason for this design? > > > Add more background on this question below. > > The CPU CTIs we use based on the CTI v8 architecture that support more > trigger number for the trigger in and trigger out. > > If we configured "arm,coresight-cti-v8-arch" for CPU CTIs in the device > tree, it will causes the trigger number to be unavailable. > CTI's in v8 attached to the CPU have an architecturally mandated set of triggers - this is the set that is defined with this compatible. This is designed to save effort in describing the elements in the device tree. > Is there any way to solve the problem we have now? > > Is it possible to change the trigger number supported by CPU CTIs by > configuring device tree? For custom CTIs use the arm,coresight-cti compatible, and describe your CTI as shown in ./Documentation/devicetree/bindings/arm/arm.coresight-cti.yaml This has an example of custom CTI bindings Regards Mike > > > > > Best, > > > > Tao > > > Best, > > Tao > -- Mike Leach Principal Engineer, ARM Ltd. Manchester Design Centre. UK

1 year, 8 months

Re: [RFC] Add trig_ts function in STM to generate TRIG_TS packet periodically

by Jinlong Mao

On 2/23/2023 9:38 PM, Alexander Shishkin wrote: > Jinlong Mao <quic_jinlmao(a)quicinc.com> writes: > >> On PC tool, it can show the logs from ETR in real time. >> >> When one small packet send from STM to ETR, it can be stuck between STM >> and ETR. >> When the packet stuck happens, it will be flushed to ETR only when some >> other packets >> generated from STM source or CTI flush commands are sent. If the time is >> too long to wait >> for next packets coming, user will consider that issue happens with >> previous small packet. >> And user's requirement is that packet from STM can be flushed to ETR >> automatically instead >> of sending commands manually. >> >> Is it appropriate to add a sysfs node for STM to generate the trigger >> packet periodically for such case ? > There's stm_heartbeat that will send a string via STM on a timer. It > will come on its own channel, so your PC tool should be able to ignore > it. Would that help? Hi Alex, It helps with my case. How to implement it ? Thanks Jinlong Mao > > Regards, > -- > Alex

1 year, 8 months

[RFC] Add trig_ts function in STM to generate TRIG_TS packet periodically

by Jinlong Mao

Hi all, When there is some small packet sent from STM to ETR, the small packet could be stuck between source and sink even if manual flush is set when disable ETR. So there is requirement that flush the STM trace periodically after enabling STM to ETR. STM can generate TRIG_TS packet by writing to offset 0xF0 of the driver STM stimulus port. ETR has ability to initiate a flush on seeing a TRIG_TS packet. For this requirement, I want to create a sysfs node like trig_ts for STM. When writing 1 to this sysfs node, a timer with 1 second periodicity in STM will start to generate the trig_ts packet to ETR. Once ETR receive the TRIG_TS packet, it will initiate a flush. Could you please help to provide your comments on this requirement ? Thanks Jinlong Mao

1 year, 8 months

Re: [PATCH] coresight: tmc-etr: Handle enable failure in tmc_read_unprepare_etr

by Suzuki K Poulose

On 21/02/2023 18:38, Yabin Cui wrote: > Ping for review? > > On Fri, Feb 10, 2023 at 11:43 PM Yabin Cui <yabinc(a)google.com> wrote: >> >> It's similar to what we did in tmc_read_unprepare_etb. >> >> Signed-off-by: Yabin Cui <yabinc(a)google.com> >> --- Thanks Yabin for the patch, will queue this at rc1 Suzuki >> drivers/hwtracing/coresight/coresight-tmc-etr.c | 7 ++++++- >> 1 file changed, 6 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c >> index 918d461fcf4a..b04f12079efd 100644 >> --- a/drivers/hwtracing/coresight/coresight-tmc-etr.c >> +++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c >> @@ -1763,6 +1763,7 @@ int tmc_read_unprepare_etr(struct tmc_drvdata *drvdata) >> { >> unsigned long flags; >> struct etr_buf *sysfs_buf = NULL; >> + int rc = 0; >> >> /* config types are set a boot time and never change */ >> if (WARN_ON_ONCE(drvdata->config_type != TMC_CONFIG_TYPE_ETR)) >> @@ -1777,7 +1778,11 @@ int tmc_read_unprepare_etr(struct tmc_drvdata *drvdata) >> * buffer. Since the tracer is still enabled drvdata::buf can't >> * be NULL. >> */ >> - __tmc_etr_enable_hw(drvdata); >> + rc = __tmc_etr_enable_hw(drvdata); >> + if (rc) { >> + spin_unlock_irqrestore(&drvdata->spinlock, flags); >> + return rc; >> + } >> } else { >> /* >> * The ETR is not tracing and the buffer was just read. >> -- >> 2.39.1.581.gbfd45094c4-goog >>

1 year, 8 months

[PATCH 0/3] Extend logging on TMC start / stop errors

by Mike Leach

Recent issues with trying to debug TMC timeouts and flush issues shows a general lack of logging and context around the possible errors Patchset addresses that. Signed-off-by: Mike Leach <mike.leach(a)linaro.org> Mike Leach (3): coresight: Update timeout functions to allow return of test register value coresight: tmc: Update error logging in tmc common functions coresight: etf: etr: Update logging around flush_and_stop() errors drivers/hwtracing/coresight/coresight-core.c | 50 +++++++++++++++---- .../hwtracing/coresight/coresight-tmc-core.c | 37 +++++++++++--- .../hwtracing/coresight/coresight-tmc-etf.c | 12 +++-- .../hwtracing/coresight/coresight-tmc-etr.c | 8 ++- drivers/hwtracing/coresight/coresight-tmc.h | 2 +- include/linux/coresight.h | 10 +++- 6 files changed, 93 insertions(+), 26 deletions(-) -- 2.17.1

1 year, 9 months

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