CoreSight

coresight@lists.linaro.org

4 participants
2500 discussions

by Ruslan Bukin

Hi I'm adding Coresight tracing support to FreeBSD. The kernel support is currently on review (https://reviews.freebsd.org/D14618, https://reviews.freebsd.org/D12875). At this step I would like to include OpenCSD to base FreeBSD distribution, but I have small local change preventing me to do so. Here is a small patch to OpenCSD attached. Can someone take a look? We use LLVM and the 'params' vector is left uninitialized in ETMv4 decoder. I'm not sure if this is correct fix, but it works fine for us. I also added a pull request here: https://github.com/Linaro/OpenCSD/pull/12 Thank you. Ruslan

7 years, 6 months

[PATCH 4/4] coresight: remove CORESIGHT_LINKS_AND_SINKS dependencies

by Kim Phillips

They're not needed anymore. Suggested-by: Mathieu Poirier <mathieu.poirier(a)linaro.org> Signed-off-by: Kim Phillips <kim.phillips(a)arm.com> --- drivers/hwtracing/coresight/Kconfig | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig index 506fe5db3074..d4f683366cd2 100644 --- a/drivers/hwtracing/coresight/Kconfig +++ b/drivers/hwtracing/coresight/Kconfig @@ -24,7 +24,7 @@ config CORESIGHT_LINKS_AND_SINKS config CORESIGHT_LINK_AND_SINK_TMC tristate "Coresight generic TMC driver" - depends on CORESIGHT_LINKS_AND_SINKS + depends on CORESIGHT help This enables support for the Trace Memory Controller driver. Depending on its configuration the device can act as a link (embedded @@ -34,7 +34,7 @@ config CORESIGHT_LINK_AND_SINK_TMC config CORESIGHT_SINK_TPIU tristate "Coresight generic TPIU driver" - depends on CORESIGHT_LINKS_AND_SINKS + depends on CORESIGHT help This enables support for the Trace Port Interface Unit driver, responsible for bridging the gap between the on-chip coresight @@ -45,7 +45,7 @@ config CORESIGHT_SINK_TPIU config CORESIGHT_SINK_ETBV10 tristate "Coresight ETBv1.0 driver" - depends on CORESIGHT_LINKS_AND_SINKS + depends on CORESIGHT help This enables support for the Embedded Trace Buffer version 1.0 driver that complies with the generic implementation of the component without @@ -53,7 +53,7 @@ config CORESIGHT_SINK_ETBV10 config CORESIGHT_SOURCE_ETM3X tristate "CoreSight Embedded Trace Macrocell 3.x driver" - depends on !ARM64 && CORESIGHT_LINKS_AND_SINKS + depends on CORESIGHT && !ARM64 help This driver provides support for processor ETM3.x and PTM1.x modules, which allows tracing the instructions that a processor is executing @@ -62,7 +62,7 @@ config CORESIGHT_SOURCE_ETM3X config CORESIGHT_SOURCE_ETM4X tristate "CoreSight Embedded Trace Macrocell 4.x driver" - depends on ARM64 && CORESIGHT_LINKS_AND_SINKS + depends on CORESIGHT && ARM64 help This driver provides support for the ETM4.x tracer module, tracing the instructions that a processor is executing. This is primarily useful @@ -71,7 +71,7 @@ config CORESIGHT_SOURCE_ETM4X config CORESIGHT_DYNAMIC_REPLICATOR tristate "CoreSight Programmable Replicator driver" - depends on CORESIGHT_LINKS_AND_SINKS + depends on CORESIGHT help This enables support for dynamic CoreSight replicator link driver. The programmable ATB replicator allows independent filtering of the @@ -80,7 +80,7 @@ config CORESIGHT_DYNAMIC_REPLICATOR config CORESIGHT_STM tristate "CoreSight System Trace Macrocell driver" depends on (ARM && !(CPU_32v3 || CPU_32v4 || CPU_32v4T)) || ARM64 - depends on STM && CORESIGHT_LINKS_AND_SINKS + depends on STM help This driver provides support for hardware assisted software instrumentation based tracing. This is primarily used for -- 2.16.2

7 years, 6 months

[PATCH 2/4] kernel/pid.c: Export find_task_by_vpid for use in external modules

by Kim Phillips

Needed by coresight modularization effort. Signed-off-by: Kim Phillips <kim.phillips(a)arm.com> --- Change(s) from RFC: none. kernel/pid.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/pid.c b/kernel/pid.c index ed6c343fe50d..2bbbed601f2e 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -342,6 +342,7 @@ struct task_struct *find_task_by_vpid(pid_t vnr) { return find_task_by_pid_ns(vnr, task_active_pid_ns(current)); } +EXPORT_SYMBOL_GPL(find_task_by_vpid); struct task_struct *find_get_task_by_vpid(pid_t nr) { -- 2.16.2

7 years, 6 months

[PATCH 1/4] amba: Export amba_bustype

by Kim Phillips

This allows modules to match struct device.bus to amba_bustype for the purpose of casting the device to an amba_device with to_amba_device(). Cc: Alex Williamson <alex.williamson(a)redhat.com> Cc: Eric Auger <eric.auger(a)redhat.com> Cc: Russell King <linux(a)armlinux.org.uk> [RESEND due to new coresight modularization dependency] Signed-off-by: Kim Phillips <kim.phillips(a)arm.com> --- Reviving https://lkml.org/lkml/2017/6/20/682, since it's needed by CoreSight modularization, and I can't tell what fate the original version had. Change(s) from RFC: none. drivers/amba/bus.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c index 594c228d2f02..12283bd06733 100644 --- a/drivers/amba/bus.c +++ b/drivers/amba/bus.c @@ -197,6 +197,7 @@ struct bus_type amba_bustype = { .pm = &amba_pm, .force_dma = true, }; +EXPORT_SYMBOL_GPL(amba_bustype); static int __init amba_init(void) { -- 2.16.2

7 years, 6 months

[RFC 3/3] Coresight: allow to build as modules

by Kim Phillips

Allow to build coresight as modules. This greatly enhances developer efficiency by allowing the development to take place exclusively on the target, and without needing to reboot in between changes. - Kconfig bools become tristates, to allow =m - MODULE_* macros added: Please correct me if I'm wrong: - assume LICENSE is "GPL v2" - tried to get as close to original authors for MODULE_AUTHOR - The 'select' Kconfig statements are replaced with 'depends on' clauses, to specify the dependencies between the modules including other fixes, e.g., coresight-stm unconditionally calls stm_register_device, it therefore depends on STM. - use -objs to denote merge object directives in Makefile, adds a coresight-core nomenclature for the base module. - add a coresight_exit() that unregisters the coresight bus, add remove fns for most others. - fix up modules with ID tables for autoloading on boot, add missing __init and __exit attributes - move coresight_vpid_to_pid to an externed, single instance in coresight-core, to be used by all submodules. Signed-off-by: Kim Phillips <kim.phillips(a)arm.com> --- So far tested on a Juno (albeit getting dreaded mmap error 12 (ENOMEM) on a linux-next based tree), build-tested for arm32. drivers/hwtracing/coresight/Kconfig | 33 ++++++++--------- drivers/hwtracing/coresight/Makefile | 28 ++++++++++----- drivers/hwtracing/coresight/coresight-cpu-debug.c | 2 ++ .../coresight/coresight-dynamic-replicator.c | 18 +++++++++- drivers/hwtracing/coresight/coresight-etb10.c | 18 +++++++++- drivers/hwtracing/coresight/coresight-etm-cp14.c | 4 +++ drivers/hwtracing/coresight/coresight-etm-perf.c | 13 ++++++- drivers/hwtracing/coresight/coresight-etm-perf.h | 2 +- .../hwtracing/coresight/coresight-etm3x-sysfs.c | 5 +++ drivers/hwtracing/coresight/coresight-etm3x.c | 18 +++++++++- .../hwtracing/coresight/coresight-etm4x-sysfs.c | 6 ++++ drivers/hwtracing/coresight/coresight-etm4x.c | 19 +++++++++- drivers/hwtracing/coresight/coresight-funnel.c | 18 +++++++++- drivers/hwtracing/coresight/coresight-priv.h | 2 +- drivers/hwtracing/coresight/coresight-replicator.c | 18 +++++++++- drivers/hwtracing/coresight/coresight-stm.c | 22 ++++++++++-- drivers/hwtracing/coresight/coresight-tmc-etf.c | 6 ++++ drivers/hwtracing/coresight/coresight-tmc-etr.c | 5 +++ drivers/hwtracing/coresight/coresight-tmc.c | 23 +++++++++++- drivers/hwtracing/coresight/coresight-tpiu.c | 21 +++++++++-- drivers/hwtracing/coresight/coresight.c | 42 ++++++++++++++++++++++ include/linux/coresight.h | 23 ++---------- 22 files changed, 284 insertions(+), 62 deletions(-) diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig index ef9cb3c164e1..506fe5db3074 100644 --- a/drivers/hwtracing/coresight/Kconfig +++ b/drivers/hwtracing/coresight/Kconfig @@ -2,8 +2,8 @@ # Coresight configuration # menuconfig CORESIGHT - bool "CoreSight Tracing Support" - select ARM_AMBA + tristate "CoreSight Tracing Support" + depends on ARM_AMBA select PERF_EVENTS help This framework provides a kernel interface for the CoreSight debug @@ -14,7 +14,8 @@ menuconfig CORESIGHT if CORESIGHT config CORESIGHT_LINKS_AND_SINKS - bool "CoreSight Link and Sink drivers" + tristate "CoreSight Link and Sink drivers" + depends on CORESIGHT help This enables support for CoreSight link and sink drivers that are responsible for transporting and collecting the trace data @@ -22,7 +23,7 @@ config CORESIGHT_LINKS_AND_SINKS entity at run time to form a complete trace path. config CORESIGHT_LINK_AND_SINK_TMC - bool "Coresight generic TMC driver" + tristate "Coresight generic TMC driver" depends on CORESIGHT_LINKS_AND_SINKS help This enables support for the Trace Memory Controller driver. @@ -32,7 +33,7 @@ config CORESIGHT_LINK_AND_SINK_TMC special enhancement or added features. config CORESIGHT_SINK_TPIU - bool "Coresight generic TPIU driver" + tristate "Coresight generic TPIU driver" depends on CORESIGHT_LINKS_AND_SINKS help This enables support for the Trace Port Interface Unit driver, @@ -43,7 +44,7 @@ config CORESIGHT_SINK_TPIU the on-board coresight memory can handle. config CORESIGHT_SINK_ETBV10 - bool "Coresight ETBv1.0 driver" + tristate "Coresight ETBv1.0 driver" depends on CORESIGHT_LINKS_AND_SINKS help This enables support for the Embedded Trace Buffer version 1.0 driver @@ -51,9 +52,8 @@ config CORESIGHT_SINK_ETBV10 special enhancement or added features. config CORESIGHT_SOURCE_ETM3X - bool "CoreSight Embedded Trace Macrocell 3.x driver" - depends on !ARM64 - select CORESIGHT_LINKS_AND_SINKS + tristate "CoreSight Embedded Trace Macrocell 3.x driver" + depends on !ARM64 && CORESIGHT_LINKS_AND_SINKS help This driver provides support for processor ETM3.x and PTM1.x modules, which allows tracing the instructions that a processor is executing @@ -61,9 +61,8 @@ config CORESIGHT_SOURCE_ETM3X the ETM version data tracing may also be available. config CORESIGHT_SOURCE_ETM4X - bool "CoreSight Embedded Trace Macrocell 4.x driver" - depends on ARM64 - select CORESIGHT_LINKS_AND_SINKS + tristate "CoreSight Embedded Trace Macrocell 4.x driver" + depends on ARM64 && CORESIGHT_LINKS_AND_SINKS help This driver provides support for the ETM4.x tracer module, tracing the instructions that a processor is executing. This is primarily useful @@ -71,7 +70,7 @@ config CORESIGHT_SOURCE_ETM4X data tracing may also be available. config CORESIGHT_DYNAMIC_REPLICATOR - bool "CoreSight Programmable Replicator driver" + tristate "CoreSight Programmable Replicator driver" depends on CORESIGHT_LINKS_AND_SINKS help This enables support for dynamic CoreSight replicator link driver. @@ -79,10 +78,9 @@ config CORESIGHT_DYNAMIC_REPLICATOR trace data based on the traceid. config CORESIGHT_STM - bool "CoreSight System Trace Macrocell driver" + tristate "CoreSight System Trace Macrocell driver" depends on (ARM && !(CPU_32v3 || CPU_32v4 || CPU_32v4T)) || ARM64 - select CORESIGHT_LINKS_AND_SINKS - select STM + depends on STM && CORESIGHT_LINKS_AND_SINKS help This driver provides support for hardware assisted software instrumentation based tracing. This is primarily used for @@ -91,8 +89,7 @@ config CORESIGHT_STM config CORESIGHT_CPU_DEBUG tristate "CoreSight CPU Debug driver" - depends on ARM || ARM64 - depends on DEBUG_FS + depends on CORESIGHT && DEBUG_FS help This driver provides support for coresight debugging module. This is primarily used to dump sample-based profiling registers when diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile index 61db9dd0d571..95a4b1ffe794 100644 --- a/drivers/hwtracing/coresight/Makefile +++ b/drivers/hwtracing/coresight/Makefile @@ -2,19 +2,29 @@ # # Makefile for CoreSight drivers. # -obj-$(CONFIG_CORESIGHT) += coresight.o coresight-etm-perf.o -obj-$(CONFIG_OF) += of_coresight.o -obj-$(CONFIG_CORESIGHT_LINK_AND_SINK_TMC) += coresight-tmc.o \ - coresight-tmc-etf.o \ - coresight-tmc-etr.o +obj-$(CONFIG_CORESIGHT) += coresight-core.o +coresight-core-objs := coresight.o \ + of_coresight.o + +obj-$(CONFIG_CORESIGHT) += coresight-etm-perf.o + +obj-$(CONFIG_CORESIGHT_LINK_AND_SINK_TMC) += coresight-link-sink-tmc.o +coresight-link-sink-tmc-objs := coresight-tmc.o \ + coresight-tmc-etf.o \ + coresight-tmc-etr.o obj-$(CONFIG_CORESIGHT_SINK_TPIU) += coresight-tpiu.o obj-$(CONFIG_CORESIGHT_SINK_ETBV10) += coresight-etb10.o obj-$(CONFIG_CORESIGHT_LINKS_AND_SINKS) += coresight-funnel.o \ coresight-replicator.o -obj-$(CONFIG_CORESIGHT_SOURCE_ETM3X) += coresight-etm3x.o coresight-etm-cp14.o \ - coresight-etm3x-sysfs.o -obj-$(CONFIG_CORESIGHT_SOURCE_ETM4X) += coresight-etm4x.o \ - coresight-etm4x-sysfs.o +obj-$(CONFIG_CORESIGHT_SOURCE_ETM3X) += coresight-etm3x-core.o +coresight-etm3x-core-objs := coresight-etm3x.o \ + coresight-etm-cp14.o \ + coresight-etm3x-sysfs.o + +obj-$(CONFIG_CORESIGHT_SOURCE_ETM4X) += coresight-etm4x-core.o + +coresight-etm4x-core-objs := coresight-etm4x.o coresight-etm4x-sysfs.o + obj-$(CONFIG_CORESIGHT_DYNAMIC_REPLICATOR) += coresight-dynamic-replicator.o obj-$(CONFIG_CORESIGHT_STM) += coresight-stm.o obj-$(CONFIG_CORESIGHT_CPU_DEBUG) += coresight-cpu-debug.o diff --git a/drivers/hwtracing/coresight/coresight-cpu-debug.c b/drivers/hwtracing/coresight/coresight-cpu-debug.c index 9cdb3fbc8c1f..ff6d3be1b13c 100644 --- a/drivers/hwtracing/coresight/coresight-cpu-debug.c +++ b/drivers/hwtracing/coresight/coresight-cpu-debug.c @@ -683,6 +683,8 @@ static const struct amba_id debug_ids[] = { { 0, 0 }, }; +MODULE_DEVICE_TABLE(amba, debug_ids); + static struct amba_driver debug_driver = { .drv = { .name = "coresight-cpu-debug", diff --git a/drivers/hwtracing/coresight/coresight-dynamic-replicator.c b/drivers/hwtracing/coresight/coresight-dynamic-replicator.c index 043da86b0fe9..a7f486a577b0 100644 --- a/drivers/hwtracing/coresight/coresight-dynamic-replicator.c +++ b/drivers/hwtracing/coresight/coresight-dynamic-replicator.c @@ -167,6 +167,15 @@ static int replicator_probe(struct amba_device *adev, const struct amba_id *id) return PTR_ERR_OR_ZERO(drvdata->csdev); } +static int __exit replicator_remove(struct amba_device *adev) +{ + struct replicator_state *drvdata = dev_get_drvdata(&adev->dev); + + coresight_unregister(drvdata->csdev); + + return 0; +} + #ifdef CONFIG_PM static int replicator_runtime_suspend(struct device *dev) { @@ -208,6 +217,8 @@ static const struct amba_id replicator_ids[] = { { 0, 0 }, }; +MODULE_DEVICE_TABLE(amba, replicator_ids); + static struct amba_driver replicator_driver = { .drv = { .name = "coresight-dynamic-replicator", @@ -215,6 +226,11 @@ static struct amba_driver replicator_driver = { .suppress_bind_attrs = true, }, .probe = replicator_probe, + .remove = replicator_remove, .id_table = replicator_ids, }; -builtin_amba_driver(replicator_driver); +module_amba_driver(replicator_driver); + +MODULE_AUTHOR("Suzuki K Poulose <suzuki.poulose(a)arm.com>"); +MODULE_DESCRIPTION("ARM Coresight Dynamic Replicator Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c index 580cd381adf3..b011254f083a 100644 --- a/drivers/hwtracing/coresight/coresight-etb10.c +++ b/drivers/hwtracing/coresight/coresight-etb10.c @@ -719,6 +719,15 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id) return ret; } +static int __exit etb_remove(struct amba_device *adev) +{ + struct etb_drvdata *drvdata = dev_get_drvdata(&adev->dev); + + coresight_unregister(drvdata->csdev); + + return 0; +} + #ifdef CONFIG_PM static int etb_runtime_suspend(struct device *dev) { @@ -753,6 +762,8 @@ static const struct amba_id etb_ids[] = { { 0, 0}, }; +MODULE_DEVICE_TABLE(amba, etb_ids); + static struct amba_driver etb_driver = { .drv = { .name = "coresight-etb10", @@ -762,6 +773,11 @@ static struct amba_driver etb_driver = { }, .probe = etb_probe, + .remove = etb_remove, .id_table = etb_ids, }; -builtin_amba_driver(etb_driver); +module_amba_driver(etb_driver); + +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier(a)linaro.org>"); +MODULE_DESCRIPTION("Arm CoreSight Embedded Trace Buffer driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight-etm-cp14.c b/drivers/hwtracing/coresight/coresight-etm-cp14.c index 12a220682117..1e16a6358364 100644 --- a/drivers/hwtracing/coresight/coresight-etm-cp14.c +++ b/drivers/hwtracing/coresight/coresight-etm-cp14.c @@ -589,3 +589,7 @@ int etm_writel_cp14(u32 reg, u32 val) return 0; } + +MODULE_AUTHOR("Pratik Patel <pratikp(a)codeaurora.org>"); +MODULE_DESCRIPTION("Arm CoreSight ETM CP14 driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c index 8a0ad77574e7..9c1b9b359feb 100644 --- a/drivers/hwtracing/coresight/coresight-etm-perf.c +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c @@ -484,6 +484,7 @@ int etm_perf_symlink(struct coresight_device *csdev, bool link) return 0; } +EXPORT_SYMBOL_GPL(etm_perf_symlink); static int __init etm_perf_init(void) { @@ -511,4 +512,14 @@ static int __init etm_perf_init(void) return ret; } -device_initcall(etm_perf_init); +module_init(etm_perf_init); + +static void __exit etm_perf_exit(void) +{ + perf_pmu_unregister(&etm_pmu); +} +module_exit(etm_perf_exit); + +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier(a)linaro.org>"); +MODULE_DESCRIPTION("Arm CoreSight tracer perf driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.h b/drivers/hwtracing/coresight/coresight-etm-perf.h index 3ffc9feb2d64..8c49c7b82d84 100644 --- a/drivers/hwtracing/coresight/coresight-etm-perf.h +++ b/drivers/hwtracing/coresight/coresight-etm-perf.h @@ -54,7 +54,7 @@ struct etm_filters { }; -#ifdef CONFIG_CORESIGHT +#if IS_ENABLED(CONFIG_CORESIGHT) int etm_perf_symlink(struct coresight_device *csdev, bool link); #else diff --git a/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c index 6e547ec6fead..bef24b9fe83c 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c @@ -17,6 +17,7 @@ #include <linux/pm_runtime.h> #include <linux/sysfs.h> +#include <linux/coresight.h> #include "coresight-etm.h" #include "coresight-priv.h" @@ -1274,3 +1275,7 @@ const struct attribute_group *coresight_etm_groups[] = { &coresight_etm_mgmt_group, NULL, }; + +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier(a)linaro.org>"); +MODULE_DESCRIPTION("Arm CoreSight Program Flow Trace sysfs driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c index 39f42fdd503d..dc6347594ac3 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x.c +++ b/drivers/hwtracing/coresight/coresight-etm3x.c @@ -873,6 +873,15 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id) return ret; } +static int __exit etm_remove(struct amba_device *adev) +{ + struct etm_drvdata *drvdata = dev_get_drvdata(&adev->dev); + + coresight_unregister(drvdata->csdev); + + return 0; +} + #ifdef CONFIG_PM static int etm_runtime_suspend(struct device *dev) { @@ -933,6 +942,8 @@ static const struct amba_id etm_ids[] = { { 0, 0}, }; +MODULE_DEVICE_TABLE(amba, etm_ids); + static struct amba_driver etm_driver = { .drv = { .name = "coresight-etm3x", @@ -941,6 +952,11 @@ static struct amba_driver etm_driver = { .suppress_bind_attrs = true, }, .probe = etm_probe, + .remove = etm_remove, .id_table = etm_ids, }; -builtin_amba_driver(etm_driver); +module_amba_driver(etm_driver); + +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier(a)linaro.org>"); +MODULE_DESCRIPTION("Arm CoreSight Program Flow Trace driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c index d21961710713..04119b963454 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c @@ -17,6 +17,7 @@ #include <linux/pm_runtime.h> #include <linux/sysfs.h> +#include <linux/coresight.h> #include "coresight-etm4x.h" #include "coresight-priv.h" @@ -2155,3 +2156,8 @@ const struct attribute_group *coresight_etmv4_groups[] = { &coresight_etmv4_trcidr_group, NULL, }; +EXPORT_SYMBOL_GPL(coresight_etmv4_groups); + +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier(a)linaro.org>"); +MODULE_DESCRIPTION("Arm CoreSight Program Flow Trace v4 sysfs driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c index cf364a514c12..cc8cb519c21b 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.c +++ b/drivers/hwtracing/coresight/coresight-etm4x.c @@ -905,6 +905,7 @@ void etm4_config_trace_mode(struct etmv4_config *config) config->addr_acc[ETM_DEFAULT_ADDR_COMP] = addr_acc; config->addr_acc[ETM_DEFAULT_ADDR_COMP + 1] = addr_acc; } +EXPORT_SYMBOL_GPL(etm4_config_trace_mode); static int etm4_online_cpu(unsigned int cpu) { @@ -1052,6 +1053,15 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id) return ret; } +static int __exit etm4_remove(struct amba_device *adev) +{ + struct etmv4_drvdata *drvdata = dev_get_drvdata(&adev->dev); + + coresight_unregister(drvdata->csdev); + + return 0; +} + static const struct amba_id etm4_ids[] = { { /* ETM 4.0 - Cortex-A53 */ .id = 0x000bb95d, @@ -1071,12 +1081,19 @@ static const struct amba_id etm4_ids[] = { { 0, 0}, }; +MODULE_DEVICE_TABLE(amba, etm4_ids); + static struct amba_driver etm4x_driver = { .drv = { .name = "coresight-etm4x", .suppress_bind_attrs = true, }, .probe = etm4_probe, + .remove = etm4_remove, .id_table = etm4_ids, }; -builtin_amba_driver(etm4x_driver); +module_amba_driver(etm4x_driver); + +MODULE_AUTHOR("Pratik Patel <pratikp(a)codeaurora.org>"); +MODULE_DESCRIPTION("Arm CoreSight Program Flow Trace v4 driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c index 9f8ac0bef853..bb87902c4f28 100644 --- a/drivers/hwtracing/coresight/coresight-funnel.c +++ b/drivers/hwtracing/coresight/coresight-funnel.c @@ -218,6 +218,15 @@ static int funnel_probe(struct amba_device *adev, const struct amba_id *id) return PTR_ERR_OR_ZERO(drvdata->csdev); } +static int __exit funnel_remove(struct amba_device *adev) +{ + struct funnel_drvdata *drvdata = dev_get_drvdata(&adev->dev); + + coresight_unregister(drvdata->csdev); + + return 0; +} + #ifdef CONFIG_PM static int funnel_runtime_suspend(struct device *dev) { @@ -257,6 +266,8 @@ static const struct amba_id funnel_ids[] = { { 0, 0}, }; +MODULE_DEVICE_TABLE(amba, funnel_ids); + static struct amba_driver funnel_driver = { .drv = { .name = "coresight-funnel", @@ -265,6 +276,11 @@ static struct amba_driver funnel_driver = { .suppress_bind_attrs = true, }, .probe = funnel_probe, + .remove = funnel_remove, .id_table = funnel_ids, }; -builtin_amba_driver(funnel_driver); +module_amba_driver(funnel_driver); + +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier(a)linaro.org>"); +MODULE_DESCRIPTION("ARM Coresight Funnel Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h index f1d0e21d8cab..f01e38838cfc 100644 --- a/drivers/hwtracing/coresight/coresight-priv.h +++ b/drivers/hwtracing/coresight/coresight-priv.h @@ -143,7 +143,7 @@ struct list_head *coresight_build_path(struct coresight_device *csdev, struct coresight_device *sink); void coresight_release_path(struct list_head *path); -#ifdef CONFIG_CORESIGHT_SOURCE_ETM3X +#if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM3X) extern int etm_readl_cp14(u32 off, unsigned int *val); extern int etm_writel_cp14(u32 off, u32 val); #else diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c index 3756e71cb8f5..25f557c571de 100644 --- a/drivers/hwtracing/coresight/coresight-replicator.c +++ b/drivers/hwtracing/coresight/coresight-replicator.c @@ -119,6 +119,15 @@ static int replicator_probe(struct platform_device *pdev) return ret; } +static int __exit replicator_remove(struct platform_device *pdev) +{ + struct replicator_drvdata *drvdata = dev_get_drvdata(&pdev->dev); + + coresight_unregister(drvdata->csdev); + + return 0; +} + #ifdef CONFIG_PM static int replicator_runtime_suspend(struct device *dev) { @@ -151,8 +160,11 @@ static const struct of_device_id replicator_match[] = { {} }; +MODULE_DEVICE_TABLE(of, replicator_match); + static struct platform_driver replicator_driver = { .probe = replicator_probe, + .remove = replicator_remove, .driver = { .name = "coresight-replicator", .of_match_table = replicator_match, @@ -160,4 +172,8 @@ static struct platform_driver replicator_driver = { .suppress_bind_attrs = true, }, }; -builtin_platform_driver(replicator_driver); +module_platform_driver(replicator_driver); + +MODULE_AUTHOR("Pratik Patel <pratikp(a)codeaurora.org>"); +MODULE_DESCRIPTION("ARM Coresight Replicator Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c index 15e7ef3891f5..e864602956a2 100644 --- a/drivers/hwtracing/coresight/coresight-stm.c +++ b/drivers/hwtracing/coresight/coresight-stm.c @@ -790,7 +790,7 @@ static void stm_init_generic_data(struct stm_drvdata *drvdata) drvdata->stm.set_options = stm_generic_set_options; } -static int stm_probe(struct amba_device *adev, const struct amba_id *id) +static int __init stm_probe(struct amba_device *adev, const struct amba_id *id) { int ret; void __iomem *base; @@ -889,6 +889,17 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id) return ret; } +static int __exit stm_remove(struct amba_device *adev) +{ + struct stm_drvdata *drvdata = dev_get_drvdata(&adev->dev); + + coresight_unregister(drvdata->csdev); + + stm_unregister_device(&drvdata->stm); + + return 0; +} + #ifdef CONFIG_PM static int stm_runtime_suspend(struct device *dev) { @@ -929,6 +940,8 @@ static const struct amba_id stm_ids[] = { { 0, 0}, }; +MODULE_DEVICE_TABLE(amba, stm_ids); + static struct amba_driver stm_driver = { .drv = { .name = "coresight-stm", @@ -937,7 +950,12 @@ static struct amba_driver stm_driver = { .suppress_bind_attrs = true, }, .probe = stm_probe, + .remove = stm_remove, .id_table = stm_ids, }; -builtin_amba_driver(stm_driver); +module_amba_driver(stm_driver); + +MODULE_AUTHOR("Pratik Patel <pratikp(a)codeaurora.org>"); +MODULE_DESCRIPTION("Arm CoreSight System Trace Macrocell driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight-tmc-etf.c b/drivers/hwtracing/coresight/coresight-tmc-etf.c index e2513b786242..df9ea4cb1ed1 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etf.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etf.c @@ -522,11 +522,13 @@ static const struct coresight_ops_link tmc_etf_link_ops = { const struct coresight_ops tmc_etb_cs_ops = { .sink_ops = &tmc_etf_sink_ops, }; +EXPORT_SYMBOL_GPL(tmc_etb_cs_ops); const struct coresight_ops tmc_etf_cs_ops = { .sink_ops = &tmc_etf_sink_ops, .link_ops = &tmc_etf_link_ops, }; +EXPORT_SYMBOL_GPL(tmc_etf_cs_ops); int tmc_read_prepare_etb(struct tmc_drvdata *drvdata) { @@ -575,6 +577,7 @@ int tmc_read_prepare_etb(struct tmc_drvdata *drvdata) return ret; } +EXPORT_SYMBOL_GPL(tmc_read_prepare_etb); int tmc_read_unprepare_etb(struct tmc_drvdata *drvdata) { @@ -628,3 +631,6 @@ int tmc_read_unprepare_etb(struct tmc_drvdata *drvdata) return 0; } +EXPORT_SYMBOL_GPL(tmc_read_unprepare_etb); + +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c index 68fbc8f7450e..858dff61ef41 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etr.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c @@ -263,6 +263,7 @@ static const struct coresight_ops_sink tmc_etr_sink_ops = { const struct coresight_ops tmc_etr_cs_ops = { .sink_ops = &tmc_etr_sink_ops, }; +EXPORT_SYMBOL_GPL(tmc_etr_cs_ops); int tmc_read_prepare_etr(struct tmc_drvdata *drvdata) { @@ -301,6 +302,7 @@ int tmc_read_prepare_etr(struct tmc_drvdata *drvdata) return ret; } +EXPORT_SYMBOL_GPL(tmc_read_prepare_etr); int tmc_read_unprepare_etr(struct tmc_drvdata *drvdata) { @@ -342,3 +344,6 @@ int tmc_read_unprepare_etr(struct tmc_drvdata *drvdata) return 0; } +EXPORT_SYMBOL_GPL(tmc_read_unprepare_etr); + +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c index 0ea04f588de0..564dd85494ee 100644 --- a/drivers/hwtracing/coresight/coresight-tmc.c +++ b/drivers/hwtracing/coresight/coresight-tmc.c @@ -41,6 +41,7 @@ void tmc_wait_for_tmcready(struct tmc_drvdata *drvdata) "timeout while waiting for TMC to be Ready\n"); } } +EXPORT_SYMBOL_GPL(tmc_wait_for_tmcready); void tmc_flush_and_stop(struct tmc_drvdata *drvdata) { @@ -60,16 +61,19 @@ void tmc_flush_and_stop(struct tmc_drvdata *drvdata) tmc_wait_for_tmcready(drvdata); } +EXPORT_SYMBOL_GPL(tmc_flush_and_stop); void tmc_enable_hw(struct tmc_drvdata *drvdata) { writel_relaxed(TMC_CTL_CAPT_EN, drvdata->base + TMC_CTL); } +EXPORT_SYMBOL_GPL(tmc_enable_hw); void tmc_disable_hw(struct tmc_drvdata *drvdata) { writel_relaxed(0x0, drvdata->base + TMC_CTL); } +EXPORT_SYMBOL_GPL(tmc_disable_hw); static int tmc_read_prepare(struct tmc_drvdata *drvdata) { @@ -437,6 +441,16 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id) return ret; } +static int __exit tmc_remove(struct amba_device *adev) +{ + struct tmc_drvdata *drvdata = dev_get_drvdata(&adev->dev); + + misc_deregister(&drvdata->miscdev); + coresight_unregister(drvdata->csdev); + + return 0; +} + static const struct amba_id tmc_ids[] = { { .id = 0x000bb961, @@ -461,6 +475,8 @@ static const struct amba_id tmc_ids[] = { { 0, 0}, }; +MODULE_DEVICE_TABLE(amba, tmc_ids); + static struct amba_driver tmc_driver = { .drv = { .name = "coresight-tmc", @@ -468,6 +484,11 @@ static struct amba_driver tmc_driver = { .suppress_bind_attrs = true, }, .probe = tmc_probe, + .remove = tmc_remove, .id_table = tmc_ids, }; -builtin_amba_driver(tmc_driver); +module_amba_driver(tmc_driver); + +MODULE_AUTHOR("Pratik Patel <pratikp(a)codeaurora.org>"); +MODULE_DESCRIPTION("Arm CoreSight Trace Memory Controller driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c index 805f7c2210fe..20452c5634c7 100644 --- a/drivers/hwtracing/coresight/coresight-tpiu.c +++ b/drivers/hwtracing/coresight/coresight-tpiu.c @@ -118,7 +118,8 @@ static const struct coresight_ops tpiu_cs_ops = { .sink_ops = &tpiu_sink_ops, }; -static int tpiu_probe(struct amba_device *adev, const struct amba_id *id) +static int __init tpiu_probe(struct amba_device *adev, + const struct amba_id *id) { int ret; void __iomem *base; @@ -171,6 +172,15 @@ static int tpiu_probe(struct amba_device *adev, const struct amba_id *id) return PTR_ERR_OR_ZERO(drvdata->csdev); } +static int __exit tpiu_remove(struct amba_device *adev) +{ + struct tpiu_drvdata *drvdata = dev_get_drvdata(&adev->dev); + + coresight_unregister(drvdata->csdev); + + return 0; +} + #ifdef CONFIG_PM static int tpiu_runtime_suspend(struct device *dev) { @@ -214,6 +224,8 @@ static const struct amba_id tpiu_ids[] = { { 0, 0}, }; +MODULE_DEVICE_TABLE(amba, tpiu_ids); + static struct amba_driver tpiu_driver = { .drv = { .name = "coresight-tpiu", @@ -222,6 +234,11 @@ static struct amba_driver tpiu_driver = { .suppress_bind_attrs = true, }, .probe = tpiu_probe, + .remove = tpiu_remove, .id_table = tpiu_ids, }; -builtin_amba_driver(tpiu_driver); +module_amba_driver(tpiu_driver); + +MODULE_AUTHOR("Pratik Patel <pratikp(a)codeaurora.org>"); +MODULE_DESCRIPTION("Arm CoreSight TPIU (Trace Port Interface Unit) driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c index 132dfbcd90c1..e7244ecf663c 100644 --- a/drivers/hwtracing/coresight/coresight.c +++ b/drivers/hwtracing/coresight/coresight.c @@ -24,9 +24,32 @@ #include <linux/of_platform.h> #include <linux/delay.h> #include <linux/pm_runtime.h> +#include <linux/sched.h> #include "coresight-priv.h" +#ifdef CONFIG_PID_NS +unsigned long coresight_vpid_to_pid(unsigned long vpid) +{ + struct task_struct *task = NULL; + unsigned long pid = 0; + + rcu_read_lock(); + task = find_task_by_vpid(vpid); + if (task) + pid = task_pid_nr(task); + rcu_read_unlock(); + + return pid; +} +#else +unsigned long coresight_vpid_to_pid(unsigned long vpid) +{ + return vpid; +} +#endif +EXPORT_SYMBOL_GPL(coresight_vpid_to_pid); + static DEFINE_MUTEX(coresight_mutex); /** @@ -60,6 +83,7 @@ static struct list_head *stm_path; */ const u32 barrier_pkt[5] = {0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x0}; +EXPORT_SYMBOL_GPL(barrier_pkt); static int coresight_id_match(struct device *dev, void *data) { @@ -317,6 +341,7 @@ void coresight_disable_path(struct list_head *path) } } } +EXPORT_SYMBOL_GPL(coresight_disable_path); int coresight_enable_path(struct list_head *path, u32 mode) { @@ -368,6 +393,7 @@ int coresight_enable_path(struct list_head *path, u32 mode) coresight_disable_path(path); goto out; } +EXPORT_SYMBOL_GPL(coresight_enable_path); struct coresight_device *coresight_get_sink(struct list_head *path) { @@ -383,6 +409,7 @@ struct coresight_device *coresight_get_sink(struct list_head *path) return csdev; } +EXPORT_SYMBOL_GPL(coresight_get_sink); static int coresight_enabled_sink(struct device *dev, void *data) { @@ -407,6 +434,7 @@ static int coresight_enabled_sink(struct device *dev, void *data) return 0; } +EXPORT_SYMBOL_GPL(coresight_enabled_sink); /** * coresight_get_enabled_sink - returns the first enabled sink found on the bus @@ -429,6 +457,7 @@ struct coresight_device *coresight_get_enabled_sink(bool deactivate) return dev ? to_coresight_device(dev) : NULL; } +EXPORT_SYMBOL_GPL(coresight_get_enabled_sink); /** * _coresight_build_path - recursively build a path from a @csdev to a sink. @@ -508,6 +537,7 @@ struct list_head *coresight_build_path(struct coresight_device *source, return path; } +EXPORT_SYMBOL_GPL(coresight_build_path); /** * coresight_release_path - release a previously built path. @@ -532,6 +562,7 @@ void coresight_release_path(struct list_head *path) kfree(path); path = NULL; } +EXPORT_SYMBOL_GPL(coresight_release_path); /** coresight_validate_source - make sure a source has the right credentials * @csdev: the device structure for a source. @@ -948,6 +979,7 @@ int coresight_timeout(void __iomem *addr, u32 offset, int position, int value) return -EAGAIN; } +EXPORT_SYMBOL_GPL(coresight_timeout); struct bus_type coresight_bustype = { .name = "coresight", @@ -959,6 +991,12 @@ static int __init coresight_init(void) } postcore_initcall(coresight_init); +static void __exit coresight_exit(void) +{ + bus_unregister(&coresight_bustype); +} +module_exit(coresight_exit); + struct coresight_device *coresight_register(struct coresight_desc *desc) { int i; @@ -1056,3 +1094,7 @@ void coresight_unregister(struct coresight_device *csdev) device_unregister(&csdev->dev); } EXPORT_SYMBOL_GPL(coresight_unregister); + +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier(a)linaro.org>"); +MODULE_DESCRIPTION("ARM Coresight Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/coresight.h b/include/linux/coresight.h index d950dad5056a..5863eb1a7335 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -243,7 +243,7 @@ struct coresight_ops { const struct coresight_ops_source *source_ops; }; -#ifdef CONFIG_CORESIGHT +#if IS_ENABLED(CONFIG_CORESIGHT) extern struct coresight_device * coresight_register(struct coresight_desc *desc); extern void coresight_unregister(struct coresight_device *csdev); @@ -274,24 +274,5 @@ static inline struct coresight_platform_data *of_get_coresight_platform_data( struct device *dev, const struct device_node *node) { return NULL; } #endif -#ifdef CONFIG_PID_NS -static inline unsigned long -coresight_vpid_to_pid(unsigned long vpid) -{ - struct task_struct *task = NULL; - unsigned long pid = 0; - - rcu_read_lock(); - task = find_task_by_vpid(vpid); - if (task) - pid = task_pid_nr(task); - rcu_read_unlock(); - - return pid; -} -#else -static inline unsigned long -coresight_vpid_to_pid(unsigned long vpid) { return vpid; } -#endif - +extern unsigned long coresight_vpid_to_pid(unsigned long vpid); #endif -- 2.16.2

7 years, 6 months

RE: IBM lotus-accounts

by Chris Samuel

Hi, Any updates to below emails,.? Awaiting your kind response for regarding my previous email. If it makes sense to talk, please let me know how your calendar looks. I would appreciate if you could pass along my details to the appropriate person if you don't handle this. Do you have any other requirement kindly let me know your exact target industry and target audience and target location, we will provide the exact cost and counts with many more .... Regards, Chris From: Chris Samuel [mailto:chris.samuel@lead-marketings.com] Sent: Tuesday, April 03, 2018 3:40 PM To: 'coresight(a)lists.linaro.org' Subject: IBM lotus-accounts Hi, A quick check to see if you would you be interested to acquire updated Slack, IBM Lotus Domino, IBM Lotus Notes, LogMeIn, Microsoft SharePoint, Accounts with verified email and phone numbers. kindly let me know your exact target industry and target audience and target location, we will provide the exact database counts with cost and many more.... Appreciate your time and look forward to your response. Best Regards, Chris, Marketing Executive, If you do not want to receive from us then reply back "Unsubscribe" as a Subject Line.

7 years, 6 months

Tracing issues

by Muhammad Abdul WAHAB

Tracing problem I have been using CoreSight PTM component on Zynq for more than two years. I started out by programming a simple library to program these components on a “bare-metal” system (without OS). Then, I moved on Linux and Mathieu Poirier (I can't thank him enough) helped me a lot during this phase. So far, I have been tracing small portions of my applications and the amount of trace generated was not that important. I was getting the expected trace i.e. for each branch (direct or indirect), I was getting a branch address packet in my trace. Now, I started tracing the whole .text section of binaries and I am not understanding the obtained trace. Here is how I configure Linux kernel driver (Kernel v4.9): |cd /sys/bus/coresight/devices/f889c000.ptm0 echo 1 > addr_idx echo 0 > addr_acctype echo 0 > addr_idx echo 0 > addr_acctype echo 20 > mode echo 100e0 104b4 > addr_range # These two addresses represent the beginning and end of .text section | Then, I enable the trace sink component (either ETB or TPIU) and trace source (PTM) component. |cd /sys/bus/coresight/devices/ echo 1 > f8801000.etb/enable_sink echo 1 > f889c000.ptm0/enable_source | Then, I run my application and stop tracing. |./application.elf ./disable # simply writes 0 to each enabled component (source and sink) | Then, I recover the trace using |dd|. When I trace small portions of my application, the obtained trace gives the right behavior. I check it manually by looking at |objdump| of the binary. However, when I trace the whole .text section of the application, the amount of obtained trace is very small (even smaller than if I trace only main function of the application) which is quite strange for me. Basically, the obtained trace is going through libc functions that call the main function and it stops while it is in libc. I don’t understand why I am getting this strange behavior. Do you have any ideas about what I am doing wrong. I have attached a binary source code that I am trying to trace. Thank you for your help and time. Best regards, Muhammad

7 years, 6 months

IBM lotus-accounts

by Chris Samuel

Hi, A quick check to see if you would you be interested to acquire updated Slack, IBM Lotus Domino, IBM Lotus Notes, LogMeIn, Microsoft SharePoint, Accounts with verified email and phone numbers. kindly let me know your exact target industry and target audience and target location, we will provide the exact database counts with cost and many more.... Appreciate your time and look forward to your response. Best Regards, Chris, Marketing Executive, If you do not want to receive from us then reply back "Unsubscribe" as a Subject Line.

7 years, 6 months

[PATCH v4 0/6] Coresight: Support panic kdump

by Leo Yan

This patch set is to explore Coresight tracing data for postmortem debugging. When kernel panic happens, the Coresight panic kdump can help to save on-chip tracing data and tracer metadata into DRAM, later relies on kdump and crash/perf tools to recovery tracing data for "offline" analysis. The documentation is important to understand the purpose of Coresight panic kdump, the implementation of framework and usage. Patches 0001 and patch 0002 are used for creating new sub directory for placing Coresight docs and add a new doc for Coresight panic kdump. Patch 0003 introduces the simple panic kdump framework which provides helper functions can be used by Coresight devices, and it registers panic notifier for dump tracing data. Patches 0004/0005 support panic kdump for ETB; Patch 0006 supports the kdump for ETMv4. This patch set has been reworked by following suggestions at Linaro HKG18 connect (mainly suggestions from Mathieu, thanks a lot!), and it's rebased on acme git tree [1] with last commit 109d59b900e7 ('perf vendor events s390: Add JSON files for IBM z14'). Due Coresight kdump data structure has been changed significantly, the corresponding crash extension program also has been updated for this reason [2]; furthermore the crash extension program is updated to dynamically generate kernel buildid according to vmlinux elf info [3], this is a fixing for the old code which uses hard-coded buildid value. This patch set has been verified on 96boards Hikey620 with Coresight enabling by the sysFS interface. Also the updated crash extension program has been verified to cowork with Coresight panic kdump and it successfully extracts tracing data from the vmcore and finally can be decoded by perf tool. [1] https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git [2] https://git.linaro.org/people/leo.yan/crash.git/tree/extensions/csdump.c [3] https://git.linaro.org/people/leo.yan/crash.git/tree/extensions/csdump_buil… Changes from v3: * Following Mathieu suggestion, reworked the panic kdump framework, used kdump array to maintain source and sink device handlers; * According to Mathieu suggestion, optimized panic notifier to firstly dump panic CPU tracing data and then dump other CPUs tracing data; * Refined doc to reflect these implementation changes; * Changed ETMv4 driver to add source device handler at probe phase; * Refactored crash extension program to reflect kernel changes. Changes from v2: * Add the two patches for documentation. * Following Mathieu suggestion, reworked the panic kdump framework, removed the useless flag "PRE_PANIC". * According to comment, changed to add and delete kdump node operations in sink enable/disable functions; * According to Mathieu suggestion, handle kdump node addition/deletion/updating separately for sysFS interface and perf method. Changes from v1: * Add support to dump ETMv4 meta data. * Wrote 'crash' extension csdump.so so rely on it to generate 'perf' format compatible file. * Refactored panic dump driver to support pre & post panic dump. Changes from RFC: * Follow Mathieu's suggestion, use general framework to support dump functionality. * Changed to use perf to analyse trace data. Leo Yan (6): doc: Add Coresight documentation directory doc: Add documentation for Coresight panic kdump coresight: Support panic kdump functionality coresight: tmc: Hook callback for panic kdump coresight: Set and clear sink device handler for kdump node coresight: etm4x: Support panic kdump Documentation/trace/coresight-cpu-debug.txt | 187 ---------- Documentation/trace/coresight.txt | 383 --------------------- .../trace/coresight/coresight-cpu-debug.txt | 187 ++++++++++ .../trace/coresight/coresight-panic-kdump.txt | 130 +++++++ Documentation/trace/coresight/coresight.txt | 383 +++++++++++++++++++++ MAINTAINERS | 5 +- drivers/hwtracing/coresight/Kconfig | 9 + drivers/hwtracing/coresight/Makefile | 1 + drivers/hwtracing/coresight/coresight-etm-perf.c | 5 + drivers/hwtracing/coresight/coresight-etm4x.c | 27 ++ drivers/hwtracing/coresight/coresight-etm4x.h | 15 + .../hwtracing/coresight/coresight-panic-kdump.c | 199 +++++++++++ drivers/hwtracing/coresight/coresight-priv.h | 12 + drivers/hwtracing/coresight/coresight-tmc-etf.c | 30 ++ drivers/hwtracing/coresight/coresight.c | 16 +- include/linux/coresight.h | 4 + 16 files changed, 1019 insertions(+), 574 deletions(-) delete mode 100644 Documentation/trace/coresight-cpu-debug.txt delete mode 100644 Documentation/trace/coresight.txt create mode 100644 Documentation/trace/coresight/coresight-cpu-debug.txt create mode 100644 Documentation/trace/coresight/coresight-panic-kdump.txt create mode 100644 Documentation/trace/coresight/coresight.txt create mode 100644 drivers/hwtracing/coresight/coresight-panic-kdump.c -- 2.7.4

7 years, 6 months

[RFC 2/3] kernel/pid.c: Export find_task_by_vpid for use in external modules

by Kim Phillips

Needed by coresight modularization effort. Signed-off-by: Kim Phillips <kim.phillips(a)arm.com> --- not sure if there's a way around this kernel/pid.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/pid.c b/kernel/pid.c index 157fe4b19971..92b1b623f3e0 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -342,6 +342,7 @@ struct task_struct *find_task_by_vpid(pid_t vnr) { return find_task_by_pid_ns(vnr, task_active_pid_ns(current)); } +EXPORT_SYMBOL_GPL(find_task_by_vpid); struct task_struct *find_get_task_by_vpid(pid_t nr) { -- 2.16.2

7 years, 6 months

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