CoreSight

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6 participants
2351 discussions

Re: [PATCH v3] coresight: tmc-etr: Speed up for bounce buffer in flat mode

by Leo Yan

Hi Robin, On Wed, Sep 01, 2021 at 09:03:30PM +0100, Robin Murphy wrote: [...] > > @@ -600,6 +601,7 @@ static int tmc_etr_alloc_flat_buf(struct tmc_drvdata *drvdata, > > { > > struct etr_flat_buf *flat_buf; > > struct device *real_dev = drvdata->csdev->dev.parent; > > + ssize_t aligned_size; > > /* We cannot reuse existing pages for flat buf */ > > if (pages) > > @@ -609,11 +611,18 @@ static int tmc_etr_alloc_flat_buf(struct tmc_drvdata *drvdata, > > if (!flat_buf) > > return -ENOMEM; > > - flat_buf->vaddr = dma_alloc_coherent(real_dev, etr_buf->size, > > - &flat_buf->daddr, GFP_KERNEL); > > - if (!flat_buf->vaddr) { > > - kfree(flat_buf); > > - return -ENOMEM; > > + aligned_size = PAGE_ALIGN(etr_buf->size); > > + flat_buf->pages = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, > > + get_order(aligned_size)); > > + if (!flat_buf->pages) > > + goto fail_alloc_pages; > > + > > + flat_buf->vaddr = page_address(flat_buf->pages); > > + flat_buf->daddr = dma_map_page(real_dev, flat_buf->pages, 0, > > + aligned_size, DMA_FROM_DEVICE); > > Use dma_alloc_noncoherent() rather than open-coding this - bare > alloc_pages() has no understanding of DMA masks, and you wouldn't want to > end up in the worst case of dma_map_page() bounce-buffering your bounce > buffer... Will refine the code with dma_alloc_noncoherent(); it's much reliable than the self writing code. Thanks a lot for the suggestion!

3 years, 8 months

[PATCH v2] perf build: Report failure for testing feature libopencsd

by Leo Yan

When build perf tool with passing option 'CORESIGHT=1' explicitly, if the feature test fails for library libopencsd, the build doesn't complain the feature failure and continue to build the tool with disabling the CoreSight feature insteadly. This patch changes the building behaviour, when build perf tool with the option 'CORESIGHT=1' and detect the failure for testing feature libopencsd, the build process will be aborted and it shows the complaint info. Signed-off-by: Leo Yan <leo.yan(a)linaro.org> --- Changes from v1: Fixed a typo in the error message. tools/perf/Makefile.config | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index 4a0d9a6defc7..5df79538486b 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -489,6 +489,8 @@ ifdef CORESIGHT CFLAGS += -DCS_RAW_PACKED endif endif + else + dummy := $(error Error: No libopencsd library found or the version is not up-to-date. Please install recent libopencsd to build with CORESIGHT=1) endif endif -- 2.25.1

3 years, 8 months

[PATCH] perf build: Report failure for testing feature libopencsd

by Leo Yan

When build perf tool with passing option 'CORESIGHT=1' explicitly, if the feature test fails for library libopencsd, the build doesn't complain the feature failure and continue to build the tool with disabling the CoreSight feature insteadly. This patch changes the building behaviour, when build perf tool with the option 'CORESIGHT=1' and detect the failure for testing feature libopencsd, the build process will be aborted and it shows the complaint info. Signed-off-by: Leo Yan <leo.yan(a)linaro.org> --- tools/perf/Makefile.config | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index 4a0d9a6defc7..5df79538486b 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -489,6 +489,8 @@ ifdef CORESIGHT CFLAGS += -DCS_RAW_PACKED endif endif + else + dummy := $(error Error: No libopencsd library found or the version is not up-to-date. Please install recent libopencsd to build with COREISGHT=1) endif endif -- 2.25.1

3 years, 8 months

Re: [PATCHv2 4/4] coresight: Add ETR-PERF polling.

by Mathieu Poirier

On Tue, Jul 13, 2021 at 02:15:32PM +0200, Daniel Kiss wrote: > ETR might fill up the buffer sooner than an event makes perf to trigger > the synchronisation especially in system wide trace. Polling runs > periodically to sync the ETR buffer. Period is configurable via sysfs, > disabled by default. > > Signed-off-by: Daniel Kiss <daniel.kiss(a)arm.com> > Signed-off-by: Branislav Rankov <Branislav.Rankov(a)arm.com> > Tested-by: Denis Nikitin <denik(a)chromium.org> > --- > .../testing/sysfs-bus-coresight-devices-tmc | 8 + > drivers/hwtracing/coresight/Kconfig | 12 + > drivers/hwtracing/coresight/Makefile | 1 + > .../hwtracing/coresight/coresight-etm-perf.c | 8 + > .../coresight/coresight-etr-perf-polling.c | 275 ++++++++++++++++++ > .../coresight/coresight-etr-perf-polling.h | 38 +++ > .../hwtracing/coresight/coresight-tmc-core.c | 4 + > .../hwtracing/coresight/coresight-tmc-etr.c | 13 + > 8 files changed, 359 insertions(+) > create mode 100644 drivers/hwtracing/coresight/coresight-etr-perf-polling.c > create mode 100644 drivers/hwtracing/coresight/coresight-etr-perf-polling.h > > diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc > index 6aa527296c710..3b411e8a6f417 100644 > --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc > +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc > @@ -91,3 +91,11 @@ Contact: Mathieu Poirier <mathieu.poirier(a)linaro.org> > Description: (RW) Size of the trace buffer for TMC-ETR when used in SYSFS > mode. Writable only for TMC-ETR configurations. The value > should be aligned to the kernel pagesize. > + > +What: /sys/bus/coresight/devices/<memory_map>.tmc/polling/period > +Date: July 2021 > +KernelVersion: 5.14 > +Contact: Daniel Kiss <daniel.kiss(a)arm.com> > +Description: (RW) Time in milliseconds when the TMC-ETR is synced. > + Default value is 0, means the feature is disabled. > + Writable only for TMC-ETR configurations. > diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig > index 84530fd80998c..4e91fb98849f4 100644 > --- a/drivers/hwtracing/coresight/Kconfig > +++ b/drivers/hwtracing/coresight/Kconfig > @@ -44,6 +44,18 @@ config CORESIGHT_LINK_AND_SINK_TMC > To compile this driver as a module, choose M here: the > module will be called coresight-tmc. > > + > +config CORESIGHT_ETR_PERF_POLL > + bool "Coresight ETR Perf Polling" > + > + depends on CORESIGHT_LINK_AND_SINK_TMC > + help > + Enable the support for software periodic synchronization of the ETR buffer. > + ETR might fill up the buffer sooner than an event makes perf to trigger > + the synchronization especially in system wide trace. Polling runs > + periodically to sync the ETR buffer. Period is configurable via sysfs, > + disabled by default. > + > config CORESIGHT_CATU > tristate "Coresight Address Translation Unit (CATU) driver" > depends on CORESIGHT_LINK_AND_SINK_TMC > diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile > index d60816509755c..6baac328eea87 100644 > --- a/drivers/hwtracing/coresight/Makefile > +++ b/drivers/hwtracing/coresight/Makefile > @@ -5,6 +5,7 @@ > obj-$(CONFIG_CORESIGHT) += coresight.o > coresight-y := coresight-core.o coresight-etm-perf.o coresight-platform.o \ > coresight-sysfs.o > +coresight-$(CONFIG_CORESIGHT_ETR_PERF_POLL) += coresight-etr-perf-polling.o > obj-$(CONFIG_CORESIGHT_LINK_AND_SINK_TMC) += coresight-tmc.o > coresight-tmc-y := coresight-tmc-core.o coresight-tmc-etf.o \ > coresight-tmc-etr.o > diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c > index a3f4c07f5bf8b..3095840a567c4 100644 > --- a/drivers/hwtracing/coresight/coresight-etm-perf.c > +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c > @@ -19,6 +19,7 @@ > #include <linux/workqueue.h> > > #include "coresight-etm-perf.h" > +#include "coresight-etr-perf-polling.h" > #include "coresight-priv.h" > > static struct pmu etm_pmu; > @@ -438,6 +439,8 @@ static void etm_event_start(struct perf_event *event, int flags) > /* Tell the perf core the event is alive */ > event->hw.state = 0; > > + etr_perf_polling_event_start(event, event_data, handle); > + > /* Finally enable the tracer */ > if (source_ops(csdev)->enable(csdev, event, CS_MODE_PERF)) > goto fail_disable_path; > @@ -497,6 +500,8 @@ static void etm_event_stop(struct perf_event *event, int mode) > if (!sink) > return; > > + etr_perf_polling_event_stop(event, event_data); > + > /* stop tracer */ > source_ops(csdev)->disable(csdev, event); > > @@ -741,6 +746,8 @@ int __init etm_perf_init(void) > etm_pmu.addr_filters_validate = etm_addr_filters_validate; > etm_pmu.nr_addr_filters = ETM_ADDR_CMP_MAX; > > + etr_perf_polling_init(); The problem here is that a function specific to an ETR is inserted in code that should be generic. So if we want to do the same for ETB, ETF and any kind of sink that's out there, we'd have to duplicate code and it would quickly get messy. What is needed is a generic solution. Moreover what is proposed here is centered on sinks, while the entire coresight framework is centered on sources. The polling function, although specific to sinks, should emanate from and be driven by the generic code that handles sources. There should also be a single event responsible for doing the polling rather than all of them as it is the case in this patchset. In per-thread mode where a single thread is traced it isn't a problem. In CPU-wide scenarios the first event should do the polling. There will be a gap between the time that event stops and all the other events in the trace session stop but that is a limitation we will have to live with. That leaves us with per-thread sessions where child threads are spun off. You will have to look into how events are handle in that case. Suzuki has done work in that area and might remember a few things. There are other design problems with this set that I won't get into since it needs a refactoring anyway. Regards, Mathieu > + > ret = perf_pmu_register(&etm_pmu, CORESIGHT_ETM_PMU_NAME, -1); > if (ret == 0) > etm_perf_up = true; > @@ -750,5 +757,6 @@ int __init etm_perf_init(void) > > void __exit etm_perf_exit(void) > { > + etr_perf_polling_exit(); > perf_pmu_unregister(&etm_pmu); > } > diff --git a/drivers/hwtracing/coresight/coresight-etr-perf-polling.c b/drivers/hwtracing/coresight/coresight-etr-perf-polling.c > new file mode 100644 > index 0000000000000..87e6bc42a62de > --- /dev/null > +++ b/drivers/hwtracing/coresight/coresight-etr-perf-polling.c > @@ -0,0 +1,275 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright(C) 2021 Arm Limited. All rights reserved. > + * Author: Daniel Kiss <daniel.kiss(a)arm.com> > + */ > + > +#include <linux/coresight.h> > +#include <linux/coresight-pmu.h> > +#include <linux/cpumask.h> > +#include <linux/device.h> > +#include <linux/init.h> > +#include <linux/list.h> > +#include <linux/percpu-defs.h> > +#include <linux/perf_event.h> > +#include <linux/slab.h> > +#include <linux/stringhash.h> > +#include <linux/types.h> > +#include <linux/workqueue.h> > + > +#include "coresight-etr-perf-polling.h" > +#include "coresight-priv.h" > +#include "coresight-tmc.h" > + > +struct polling_event_list { > + struct perf_event *perf_event; > + struct etm_event_data *etm_event_data; > + struct perf_output_handle *ctx_handle; > + void (*tmc_etr_reset_hw)(struct tmc_drvdata *data); > + struct list_head list; > +}; > + > +struct polling { > + int cpu; > + struct polling_event_list *polled_event; > + struct delayed_work delayed_work; > +}; > + > +static atomic_t period; > +static spinlock_t spinlock_re; > +static struct list_head registered_events; > + > +static DEFINE_PER_CPU(struct polling, polling); > + > +static ssize_t period_show(struct device *dev, struct device_attribute *attr, > + char *buf) > +{ > + int temp; > + > + temp = atomic_read(&period); > + return sprintf(buf, "%i\n", temp); > +} > + > +static ssize_t period_store(struct device *dev, struct device_attribute *attr, > + const char *buf, size_t count) > +{ > + int temp = 0; > + > + if (!kstrtoint(buf, 10, &temp) && (temp >= 0)) > + atomic_set(&period, temp); > + return count; > +} > + > +static DEVICE_ATTR_RW(period); > + > +static struct attribute *coresight_tmc_polling_attrs[] = { > + &dev_attr_period.attr, > + NULL, > +}; > +const struct attribute_group coresight_tmc_polling_group = { > + .attrs = coresight_tmc_polling_attrs, > + .name = "polling", > +}; > +EXPORT_SYMBOL_GPL(coresight_tmc_polling_group); > + > +static inline void polling_sched_worker(struct polling *p) > +{ > + int tickrate = atomic_read(&period); > + > + if (tickrate > 0) > + schedule_delayed_work_on(p->cpu, &p->delayed_work, > + msecs_to_jiffies(tickrate)); > +} > + > +static inline bool is_etr_related(struct etm_event_data *etm_event_data, int cpu) > +{ > + struct list_head *path; > + struct coresight_device *sink; > + struct tmc_drvdata *drvdata; > + > + path = etm_event_cpu_path(etm_event_data, cpu); > + if (WARN_ON(!path)) > + return false; > + sink = coresight_get_sink(path); > + if (WARN_ON(!sink)) > + return false; > + drvdata = dev_get_drvdata(sink->dev.parent); > + if (drvdata->config_type != TMC_CONFIG_TYPE_ETR) > + return false; > + return true; > +} > + > +/* > + * Adds the event to the polled events list. > + */ > +void etr_perf_polling_event_start(struct perf_event *event, > + struct etm_event_data *etm_event_data, > + struct perf_output_handle *ctx_handle) > +{ > + int cpu = smp_processor_id(); > + struct polling *p = per_cpu_ptr(&polling, cpu); > + struct polling_event_list *element, *tmp; > + > + if (!is_etr_related(etm_event_data, cpu)) > + return; > + > + spin_lock(&spinlock_re); > + list_for_each_entry_safe(element, tmp, &registered_events, list) { > + if (element->ctx_handle == ctx_handle) { > + element->perf_event = event; > + element->etm_event_data = etm_event_data; > + spin_unlock(&spinlock_re); > + p->polled_event = element; > + polling_sched_worker(p); > + return; > + } > + } > + spin_unlock(&spinlock_re); > +} > + > +/* > + * Removes the event from the to be polled events list. > + */ > +void etr_perf_polling_event_stop(struct perf_event *event, > + struct etm_event_data *etm_event_data) > +{ > + int cpu = smp_processor_id(); > + struct polling *p = per_cpu_ptr(&polling, cpu); > + > + if (!is_etr_related(etm_event_data, cpu)) > + return; > + > + if (p->polled_event) { > + struct polling_event_list *element = p->polled_event; > + > + if (element->perf_event == event) { > + p->polled_event = NULL; > + element->perf_event = NULL; > + element->etm_event_data = NULL; > + cancel_delayed_work(&p->delayed_work); > + return; > + } > + } > +} > + > +/* > + * The polling worker is a workqueue job which is periodically > + * woken up to update the perf aux buffer from the etr shrink. > + */ > +static void etr_perf_polling_worker(struct work_struct *work) > +{ > + unsigned long flags; > + struct list_head *path; > + struct coresight_device *sink; > + int size; > + int cpu = smp_processor_id(); > + struct polling *p = per_cpu_ptr(&polling, cpu); > + > + if (!atomic_read(&period)) > + return; > + > + if (!p->polled_event) > + return; > + /* > + * Scheduling would do the same from the perf hooks, > + * this should be done in one go. > + */ > + local_irq_save(flags); > + > + polling_sched_worker(p); > + > + path = etm_event_cpu_path(p->polled_event->etm_event_data, cpu); > + sink = coresight_get_sink(path); > + size = sink_ops(sink)->update_buffer( > + sink, p->polled_event->ctx_handle, > + p->polled_event->etm_event_data->snk_config); > + > + /* > + * Restart the trace. > + */ > + if (p->polled_event->tmc_etr_reset_hw) > + p->polled_event->tmc_etr_reset_hw(dev_get_drvdata(sink->dev.parent)); > + > + WARN_ON(size < 0); > + if (size > 0) { > + struct etm_event_data *new_event_data; > + > + perf_aux_output_end(p->polled_event->ctx_handle, size); > + new_event_data = perf_aux_output_begin( > + p->polled_event->ctx_handle, > + p->polled_event->perf_event); > + if (WARN_ON(new_event_data == NULL)) { > + local_irq_restore(flags); > + return; > + } > + > + p->polled_event->etm_event_data = new_event_data; > + WARN_ON(new_event_data->snk_config != > + p->polled_event->etm_event_data->snk_config); > + } > + > + local_irq_restore(flags); > +} > + > +void etr_perf_polling_handle_register(struct perf_output_handle *handle, > + void (*tmc_etr_reset_hw)(struct tmc_drvdata *drvdata)) > +{ > + struct polling_event_list *element; > + > + element = kmalloc(sizeof(*element), GFP_ATOMIC); > + if (WARN_ON(!element)) > + return; > + memset(element, 0, sizeof(*element)); > + element->ctx_handle = handle; > + element->tmc_etr_reset_hw = tmc_etr_reset_hw; > + spin_lock(&spinlock_re); > + list_add(&element->list, &registered_events); > + spin_unlock(&spinlock_re); > +} > +EXPORT_SYMBOL_GPL(etr_perf_polling_handle_register); > + > +void etr_perf_polling_handle_deregister(struct perf_output_handle *handle) > +{ > + struct polling_event_list *element, *tmp; > + > + spin_lock(&spinlock_re); > + list_for_each_entry_safe(element, tmp, &registered_events, list) { > + if (element->ctx_handle == handle) { > + list_del(&element->list); > + spin_unlock(&spinlock_re); > + kfree(element); > + return; > + } > + } > + spin_unlock(&spinlock_re); > +} > +EXPORT_SYMBOL_GPL(etr_perf_polling_handle_deregister); > + > +void etr_perf_polling_init(void) > +{ > + int cpu; > + > + spin_lock_init(&spinlock_re); > + INIT_LIST_HEAD(&registered_events); > + atomic_set(&period, 0); > + for_each_possible_cpu(cpu) { > + struct polling *p = per_cpu_ptr(&polling, cpu); > + > + p->cpu = cpu; > + p->polled_event = NULL; > + INIT_DELAYED_WORK(&p->delayed_work, etr_perf_polling_worker); > + } > +} > + > +void etr_perf_polling_exit(void) > +{ > + int cpu; > + > + for_each_possible_cpu(cpu) { > + struct polling *p = per_cpu_ptr(&polling, cpu); > + > + cancel_delayed_work_sync(&p->delayed_work); > + WARN_ON(p->polled_event); > + } > + WARN_ON(!list_empty(&registered_events)); > +} > diff --git a/drivers/hwtracing/coresight/coresight-etr-perf-polling.h b/drivers/hwtracing/coresight/coresight-etr-perf-polling.h > new file mode 100644 > index 0000000000000..d47b4424594e6 > --- /dev/null > +++ b/drivers/hwtracing/coresight/coresight-etr-perf-polling.h > @@ -0,0 +1,38 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Copyright(C) 2021 Arm Limited. All rights reserved. > + * Author: Daniel Kiss <daniel.kiss(a)arm.com> > + */ > + > +#ifndef _CORESIGHT_ETM_PERF_POLLING_H > +#define _CORESIGHT_ETM_PERF_POLLING_H > + > +#include <linux/coresight.h> > +#include <linux/perf_event.h> > +#include "coresight-etm-perf.h" > +#include "coresight-tmc.h" > + > +#ifdef CONFIG_CORESIGHT_ETR_PERF_POLL > +void etr_perf_polling_init(void); > +void etr_perf_polling_exit(void); > +void etr_perf_polling_handle_register(struct perf_output_handle *handle, > + void (*tmc_etr_reset_hw)(struct tmc_drvdata *drvdata)); > +void etr_perf_polling_handle_deregister(struct perf_output_handle *handle); > +void etr_perf_polling_event_start(struct perf_event *event, > + struct etm_event_data *etm_event_data, > + struct perf_output_handle *ctx_handle); > +void etr_perf_polling_event_stop(struct perf_event *event, > + struct etm_event_data *etm_event_data); > + > +extern const struct attribute_group coresight_tmc_polling_group; > + > +#else /* !CONFIG_CORESIGHT_ETR_PERF_POLL */ > +#define etr_perf_polling_init() > +#define etr_perf_polling_exit() > +#define etr_perf_polling_handle_register(...) > +#define etr_perf_polling_handle_deregister(...) > +#define etr_perf_polling_event_start(...) > +#define etr_perf_polling_event_stop(...) > +#endif > + > +#endif > diff --git a/drivers/hwtracing/coresight/coresight-tmc-core.c b/drivers/hwtracing/coresight/coresight-tmc-core.c > index 74c6323d4d6ab..dbcdba162bd38 100644 > --- a/drivers/hwtracing/coresight/coresight-tmc-core.c > +++ b/drivers/hwtracing/coresight/coresight-tmc-core.c > @@ -26,6 +26,7 @@ > > #include "coresight-priv.h" > #include "coresight-tmc.h" > +#include "coresight-etr-perf-polling.h" > > DEFINE_CORESIGHT_DEVLIST(etb_devs, "tmc_etb"); > DEFINE_CORESIGHT_DEVLIST(etf_devs, "tmc_etf"); > @@ -365,6 +366,9 @@ static const struct attribute_group coresight_tmc_mgmt_group = { > static const struct attribute_group *coresight_tmc_groups[] = { > &coresight_tmc_group, > &coresight_tmc_mgmt_group, > +#ifdef CONFIG_CORESIGHT_ETR_PERF_POLL > + &coresight_tmc_polling_group, > +#endif > NULL, > }; > > diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c > index 55c9b5fd9f832..67cd4bdcda71b 100644 > --- a/drivers/hwtracing/coresight/coresight-tmc-etr.c > +++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c > @@ -16,6 +16,7 @@ > #include <linux/vmalloc.h> > #include "coresight-catu.h" > #include "coresight-etm-perf.h" > +#include "coresight-etr-perf-polling.h" > #include "coresight-priv.h" > #include "coresight-tmc.h" > > @@ -1137,6 +1138,16 @@ void tmc_etr_disable_hw(struct tmc_drvdata *drvdata) > drvdata->etr_buf = NULL; > } > > +#ifdef CONFIG_CORESIGHT_ETR_PERF_POLL > + > +static void tmc_etr_reset_hw(struct tmc_drvdata *drvdata) > +{ > + __tmc_etr_disable_hw(drvdata); > + __tmc_etr_enable_hw(drvdata); > +} > + > +#endif > + > static int tmc_enable_etr_sink_sysfs(struct coresight_device *csdev) > { > int ret = 0; > @@ -1620,6 +1631,7 @@ static int tmc_enable_etr_sink_perf(struct coresight_device *csdev, void *data) > drvdata->mode = CS_MODE_PERF; > drvdata->perf_buf = etr_perf->etr_buf; > drvdata->perf_handle = handle; > + etr_perf_polling_handle_register(handle, tmc_etr_reset_hw); > atomic_inc(csdev->refcnt); > } > > @@ -1667,6 +1679,7 @@ static int tmc_disable_etr_sink(struct coresight_device *csdev) > drvdata->mode = CS_MODE_DISABLED; > /* Reset perf specific data */ > drvdata->perf_buf = NULL; > + etr_perf_polling_handle_deregister(drvdata->perf_handle); > drvdata->perf_handle = NULL; > > spin_unlock_irqrestore(&drvdata->spinlock, flags); > -- > 2.25.1 >

3 years, 8 months

Re: [PATCH 0/2] Add Coresight support for RB5 board

by Mathieu Poirier

Hi Tao, On Thu, 19 Aug 2021 at 03:29, Tao Zhang <quic_taozha(a)quicinc.com> wrote: > > This series adds Coresight support for SM8250 Soc on RB5 board. > It is composed of two elements. > a) Add ETM PID for Kryo-5XX. > b) Add coresight support to DTS for RB5. > > This series applies to coresight/next > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > > Tao Zhang (2): > coresight: etm4x: Add ETM PID for Kryo-5XX > arm64: dts: qcom: sm8250: Add Coresight support > > arch/arm64/boot/dts/qcom/qrb5165-rb5.dts | 442 +++++++++++++++++- > .../coresight/coresight-etm4x-core.c | 1 + > 2 files changed, 439 insertions(+), 4 deletions(-) > I have added your work to my patchset queue. On the other hand I have a lot of patches to review these days and as such won't be able to look at it for 4 to 5 weeks. Thanks, Mathieu > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project >

3 years, 8 months

Re: [PATCH 2/2] arm64: dts: qcom: sm8250: Add Coresight support

by Suzuki K Poulose

On 19/08/2021 10:28, Tao Zhang wrote: > Add the basic coresight components found on Qualcomm SM8250 Soc. The > basic coresight components include ETF, ETMs,STM and the related > funnels. > The changes look good. One question though, Are there any sinks at all ? (TMC-ETR ?). Kind regards Suzuki > Signed-off-by: Tao Zhang <quic_taozha(a)quicinc.com> > --- > arch/arm64/boot/dts/qcom/qrb5165-rb5.dts | 442 ++++++++++++++++++++++- > 1 file changed, 438 insertions(+), 4 deletions(-) > > diff --git a/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts b/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts > index 8ac96f8e79d4..9c8f87d80afc 100644 > --- a/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts > +++ b/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts > @@ -222,11 +222,445 @@ > regulator-max-microvolt = <1800000>; > regulator-always-on; > }; > -}; > > -&adsp { > - status = "okay"; > - firmware-name = "qcom/sm8250/adsp.mbn"; > + stm@6002000 { > + compatible = "arm,coresight-stm", "arm,primecell"; > + reg = <0 0x06002000 0 0x1000>, > + <0 0x16280000 0 0x180000>; > + reg-names = "stm-base", "stm-stimulus-base"; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + > + out-ports { > + port { > + stm_out: endpoint { > + remote-endpoint = > + <&funnel0_in7>; > + }; > + }; > + }; > + }; > + > + funnel@6041000 { > + compatible = "arm,coresight-dynamic-funnel", "arm,primecell"; > + reg = <0 0x06041000 0 0x1000>; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + > + out-ports { > + port { > + funnel0_out: endpoint { > + remote-endpoint = > + <&merge_funnel_in0>; > + }; > + }; > + }; > + > + in-ports { > + #address-cells = <1>; > + #size-cells = <0>; > + > + port@7 { > + reg = <7>; > + funnel0_in7: endpoint { > + remote-endpoint = <&stm_out>; > + }; > + }; > + }; > + }; > + > + funnel@6042000 { > + compatible = "arm,coresight-dynamic-funnel", "arm,primecell"; > + reg = <0 0x06042000 0 0x1000>; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + > + out-ports { > + port { > + funnel2_out: endpoint { > + remote-endpoint = > + <&merge_funnel_in2>; > + }; > + }; > + }; > + > + in-ports { > + #address-cells = <1>; > + #size-cells = <0>; > + > + port@4 { > + reg = <4>; > + funnel2_in5: endpoint { > + remote-endpoint = > + <&apss_merge_funnel_out>; > + }; > + }; > + }; > + }; > + > + funnel@6b04000 { > + compatible = "arm,coresight-dynamic-funnel", "arm,primecell"; > + arm,primecell-periphid = <0x000bb908>; > + > + reg = <0 0x6b04000 0 0x1000>; > + reg-names = "funnel-base"; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + > + out-ports { > + port { > + merge_funnel_out: endpoint { > + remote-endpoint = > + <&etf_in>; > + }; > + }; > + }; > + > + in-ports { > + #address-cells = <1>; > + #size-cells = <0>; > + > + port@7 { > + reg = <7>; > + swao_funnel_in7: endpoint { > + slave-mode; > + remote-endpoint= > + <&merg_funnel_out>; > + }; > + }; > + }; > + > + }; > + > + funnel@6045000 { > + compatible = "arm,coresight-dynamic-funnel", "arm,primecell"; > + reg = <0 0x06045000 0 0x1000>; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + > + out-ports { > + port { > + merg_funnel_out: endpoint { > + remote-endpoint = <&swao_funnel_in7>; > + }; > + }; > + }; > + > + in-ports { > + #address-cells = <1>; > + #size-cells = <0>; > + > + port@0 { > + reg = <0>; > + merge_funnel_in0: endpoint { > + remote-endpoint = > + <&funnel0_out>; > + }; > + }; > + > + port@1 { > + reg = <1>; > + merge_funnel_in2: endpoint { > + remote-endpoint = > + <&funnel2_out>; > + }; > + }; > + }; > + }; > + > + etf@6b05000 { > + compatible = "arm,coresight-tmc", "arm,primecell"; > + reg = <0 0x06b05000 0 0x1000>; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + > + in-ports { > + port { > + etf_in: endpoint { > + remote-endpoint = > + <&merge_funnel_out>; > + }; > + }; > + }; > + }; > + > + etm@7040000 { > + compatible = "arm,coresight-etm4x", "arm,primecell"; > + reg = <0 0x07040000 0 0x1000>; > + > + cpu = <&CPU0>; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + arm,coresight-loses-context-with-cpu; > + > + out-ports { > + port { > + etm0_out: endpoint { > + remote-endpoint = > + <&apss_funnel_in0>; > + }; > + }; > + }; > + }; > + > + etm@7140000 { > + compatible = "arm,coresight-etm4x", "arm,primecell"; > + reg = <0 0x07140000 0 0x1000>; > + > + cpu = <&CPU1>; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + arm,coresight-loses-context-with-cpu; > + > + out-ports { > + port { > + etm1_out: endpoint { > + remote-endpoint = > + <&apss_funnel_in1>; > + }; > + }; > + }; > + }; > + > + etm@7240000 { > + compatible = "arm,coresight-etm4x", "arm,primecell"; > + reg = <0 0x07240000 0 0x1000>; > + > + cpu = <&CPU2>; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + arm,coresight-loses-context-with-cpu; > + > + out-ports { > + port { > + etm2_out: endpoint { > + remote-endpoint = > + <&apss_funnel_in2>; > + }; > + }; > + }; > + }; > + > + etm@7340000 { > + compatible = "arm,coresight-etm4x", "arm,primecell"; > + reg = <0 0x07340000 0 0x1000>; > + > + cpu = <&CPU3>; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + arm,coresight-loses-context-with-cpu; > + > + out-ports { > + port { > + etm3_out: endpoint { > + remote-endpoint = > + <&apss_funnel_in3>; > + }; > + }; > + }; > + }; > + > + etm@7440000 { > + compatible = "arm,coresight-etm4x", "arm,primecell"; > + reg = <0 0x07440000 0 0x1000>; > + > + cpu = <&CPU4>; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + arm,coresight-loses-context-with-cpu; > + > + out-ports { > + port { > + etm4_out: endpoint { > + remote-endpoint = > + <&apss_funnel_in4>; > + }; > + }; > + }; > + }; > + > + etm@7540000 { > + compatible = "arm,coresight-etm4x", "arm,primecell"; > + reg = <0 0x07540000 0 0x1000>; > + > + cpu = <&CPU5>; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + arm,coresight-loses-context-with-cpu; > + > + out-ports { > + port { > + etm5_out: endpoint { > + remote-endpoint = > + <&apss_funnel_in5>; > + }; > + }; > + }; > + }; > + > + etm@7640000 { > + compatible = "arm,coresight-etm4x", "arm,primecell"; > + reg = <0 0x07640000 0 0x1000>; > + > + cpu = <&CPU6>; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + arm,coresight-loses-context-with-cpu; > + > + out-ports { > + port { > + etm6_out: endpoint { > + remote-endpoint = > + <&apss_funnel_in6>; > + }; > + }; > + }; > + }; > + > + etm@7740000 { > + compatible = "arm,coresight-etm4x", "arm,primecell"; > + reg = <0 0x07740000 0 0x1000>; > + > + cpu = <&CPU7>; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + arm,coresight-loses-context-with-cpu; > + > + out-ports { > + port { > + etm7_out: endpoint { > + remote-endpoint = > + <&apss_funnel_in7>; > + }; > + }; > + }; > + }; > + > + funnel@7800000 { > + compatible = "arm,coresight-dynamic-funnel", "arm,primecell"; > + reg = <0 0x07800000 0 0x1000>; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + > + out-ports { > + port { > + apss_funnel_out: endpoint { > + remote-endpoint = > + <&apss_merge_funnel_in>; > + }; > + }; > + }; > + > + in-ports { > + #address-cells = <1>; > + #size-cells = <0>; > + > + port@0 { > + reg = <0>; > + apss_funnel_in0: endpoint { > + remote-endpoint = > + <&etm0_out>; > + }; > + }; > + > + port@1 { > + reg = <1>; > + apss_funnel_in1: endpoint { > + remote-endpoint = > + <&etm1_out>; > + }; > + }; > + > + port@2 { > + reg = <2>; > + apss_funnel_in2: endpoint { > + remote-endpoint = > + <&etm2_out>; > + }; > + }; > + > + port@3 { > + reg = <3>; > + apss_funnel_in3: endpoint { > + remote-endpoint = > + <&etm3_out>; > + }; > + }; > + > + port@4 { > + reg = <4>; > + apss_funnel_in4: endpoint { > + remote-endpoint = > + <&etm4_out>; > + }; > + }; > + > + port@5 { > + reg = <5>; > + apss_funnel_in5: endpoint { > + remote-endpoint = > + <&etm5_out>; > + }; > + }; > + > + port@6 { > + reg = <6>; > + apss_funnel_in6: endpoint { > + remote-endpoint = > + <&etm6_out>; > + }; > + }; > + > + port@7 { > + reg = <7>; > + apss_funnel_in7: endpoint { > + remote-endpoint = > + <&etm7_out>; > + }; > + }; > + }; > + }; > + > + funnel@7810000 { > + compatible = "arm,coresight-dynamic-funnel", "arm,primecell"; > + reg = <0 0x07810000 0 0x1000>; > + > + clocks = <&aoss_qmp>; > + clock-names = "apb_pclk"; > + > + out-ports { > + port { > + apss_merge_funnel_out: endpoint { > + remote-endpoint = > + <&funnel2_in5>; > + }; > + }; > + }; > + > + in-ports { > + port { > + apss_merge_funnel_in: endpoint { > + remote-endpoint = > + <&apss_funnel_out>; > + }; > + }; > + }; > + }; > }; > > &apps_rsc { >

3 years, 8 months

Re: [PATCH 1/2] coresight: etm4x: Add ETM PID for Kryo-5XX

by Suzuki K Poulose

On 19/08/2021 10:28, Tao Zhang wrote: > Add ETM PID for Kryo-5XX to the list of supported ETMs. > Otherwise, Kryo-5XX ETMs will not be initialized successfully. > e.g. > This change can be verified on qrb5165-rb5 board. ETM4-ETM7 nodes > will not be visible without this change. > > Signed-off-by: Tao Zhang <quic_taozha(a)quicinc.com> > --- > drivers/hwtracing/coresight/coresight-etm4x-core.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c > index da27cd4a3c38..84959c585a5f 100644 > --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c > +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c > @@ -2065,6 +2065,7 @@ static const struct amba_id etm4_ids[] = { > CS_AMBA_UCI_ID(0x000bb803, uci_id_etm4),/* Qualcomm Kryo 385 Cortex-A75 */ > CS_AMBA_UCI_ID(0x000bb805, uci_id_etm4),/* Qualcomm Kryo 4XX Cortex-A55 */ > CS_AMBA_UCI_ID(0x000bb804, uci_id_etm4),/* Qualcomm Kryo 4XX Cortex-A76 */ > + CS_AMBA_UCI_ID(0x000bbd0d, uci_id_etm4),/* Qualcomm Kryo 5XX */ Please could you add Cortex-A77 to the comment ? Otherwise looks good to me. Suzuki > CS_AMBA_UCI_ID(0x000cc0af, uci_id_etm4),/* Marvell ThunderX2 */ > CS_AMBA_UCI_ID(0x000b6d01, uci_id_etm4),/* HiSilicon-Hip08 */ > CS_AMBA_UCI_ID(0x000b6d02, uci_id_etm4),/* HiSilicon-Hip09 */ >

3 years, 8 months

Enabling support in coresight for Panic - Kdump

by Linu Cherian

Hi Leo, We are interested in adding support in Coresight driver to collect trace data at the time of kernel panic. Would like to know the current status of this patch series you posted some time back [1]. If no one is working on this, we would like to revive and resubmit this. Appreciate your guidance on this. Also please discard the earlier duplicate emails which i have send to you by mistake. Thanks. 1. https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1652258.html.

3 years, 8 months

[PATCH v2 0/2] perf: Support compat mode for AUX ring buffer

by Leo Yan

This patch set is to address the comments in the patch set v1 [1] and updates the patches. Changes from v1: - Added Adrian's review tag for patch 01; - Refined comment in patch 01 (James); - Added James' review and test tag for patch 02. [1] https://lore.kernel.org/patchwork/cover/1473936/ Leo Yan (2): perf auxtrace: Add compat_auxtrace_mmap__{read_head|write_tail} perf auxtrace arm: Support compat_auxtrace_mmap__{read_head|write_tail} tools/perf/arch/arm/util/auxtrace.c | 32 +++++++++++ tools/perf/util/auxtrace.c | 88 +++++++++++++++++++++++++++-- tools/perf/util/auxtrace.h | 22 +++++++- 3 files changed, 135 insertions(+), 7 deletions(-) -- 2.25.1

3 years, 8 months

Re: [PATCH] coresight: cti: Correct the parameter for pm_runtime_put

by Leo Yan

Hi Tao, On Thu, Aug 19, 2021 at 05:29:37PM +0800, Tao Zhang wrote: > The input parameter of the function pm_runtime_put should be the > same in the function cti_enable_hw and cti_disable_hw. The correct > parameter to use here should be dev->parent. > > Signed-off-by: Tao Zhang <quic_taozha(a)quicinc.com> > --- > drivers/hwtracing/coresight/coresight-cti-core.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/hwtracing/coresight/coresight-cti-core.c b/drivers/hwtracing/coresight/coresight-cti-core.c > index e2a3620..8988b2e 100644 > --- a/drivers/hwtracing/coresight/coresight-cti-core.c > +++ b/drivers/hwtracing/coresight/coresight-cti-core.c > @@ -175,7 +175,7 @@ static int cti_disable_hw(struct cti_drvdata *drvdata) > coresight_disclaim_device_unlocked(csdev); > CS_LOCK(drvdata->base); > spin_unlock(&drvdata->spinlock); > - pm_runtime_put(dev); > + pm_runtime_put(dev->parent); coresight_register() allocates data structure 'coresight_device' and assigns probed device to the field 'coresight_device::dev::parent'; thus afterwards we need to pass 'coresight_device::dev::parent' for pm_runtime_xxx() functions. It's not directive for understanding, so log the info at here. For the patch: Reviewed-by: Leo Yan <leo.yan(a)linaro.org> We could wait for Mike to review as well. Thanks, Leo > return 0; > > /* not disabled this call */ > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project >

3 years, 8 months

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