CoreSight

coresight@lists.linaro.org

6 participants
2565 discussions

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

by Tao Zhang

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 series applies to coresight/next https://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git?h=next This patch series depends on patch series "[v12,0/9] Coresight: Add support for TPDM and TPDA" https://patchwork.kernel.org/project/linux-arm-kernel/cover/20220905065357.… 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 | 9 + drivers/hwtracing/coresight/coresight-tpda.c | 62 ++ drivers/hwtracing/coresight/coresight-tpda.h | 4 + drivers/hwtracing/coresight/coresight-tpdm.c | 625 ++++++++++++++++++++- drivers/hwtracing/coresight/coresight-tpdm.h | 60 ++ 5 files changed, 756 insertions(+), 4 deletions(-) -- 2.7.4

3 years, 1 month

[PATCH] coresight: cti: Fix hang in cti_disable_hw()

by Suzuki K Poulose

From: James Clark <james.clark(a)arm.com> cti_enable_hw() and cti_disable_hw() are called from an atomic context so shouldn't use runtime PM because it can result in a sleep when communicating with firmware. Since commit 3c6656337852 ("Revert "firmware: arm_scmi: Add clock management to the SCMI power domain""), this causes a hang on Juno when running the Perf Coresight tests or running this command: perf record -e cs_etm//u -- ls This was also missed until the revert commit because pm_runtime_put() was called with the wrong device until commit 692c9a499b28 ("coresight: cti: Correct the parameter for pm_runtime_put") With lock and scheduler debugging enabled the following is output: coresight cti_sys0: cti_enable_hw -- dev:cti_sys0 parent: 20020000.cti BUG: sleeping function called from invalid context at drivers/base/power/runtime.c:1151 in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 330, name: perf-exec preempt_count: 2, expected: 0 RCU nest depth: 0, expected: 0 INFO: lockdep is turned off. irq event stamp: 0 hardirqs last enabled at (0): [<0000000000000000>] 0x0 hardirqs last disabled at (0): [<ffff80000822b394>] copy_process+0xa0c/0x1948 softirqs last enabled at (0): [<ffff80000822b394>] copy_process+0xa0c/0x1948 softirqs last disabled at (0): [<0000000000000000>] 0x0 CPU: 3 PID: 330 Comm: perf-exec Not tainted 6.0.0-00053-g042116d99298 #7 Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II Sep 13 2022 Call trace: dump_backtrace+0x134/0x140 show_stack+0x20/0x58 dump_stack_lvl+0x8c/0xb8 dump_stack+0x18/0x34 __might_resched+0x180/0x228 __might_sleep+0x50/0x88 __pm_runtime_resume+0xac/0xb0 cti_enable+0x44/0x120 coresight_control_assoc_ectdev+0xc0/0x150 coresight_enable_path+0xb4/0x288 etm_event_start+0x138/0x170 etm_event_add+0x48/0x70 event_sched_in.isra.122+0xb4/0x280 merge_sched_in+0x1fc/0x3d0 visit_groups_merge.constprop.137+0x16c/0x4b0 ctx_sched_in+0x114/0x1f0 perf_event_sched_in+0x60/0x90 ctx_resched+0x68/0xb0 perf_event_exec+0x138/0x508 begin_new_exec+0x52c/0xd40 load_elf_binary+0x6b8/0x17d0 bprm_execve+0x360/0x7f8 do_execveat_common.isra.47+0x218/0x238 __arm64_sys_execve+0x48/0x60 invoke_syscall+0x4c/0x110 el0_svc_common.constprop.4+0xfc/0x120 do_el0_svc+0x34/0xc0 el0_svc+0x40/0x98 el0t_64_sync_handler+0x98/0xc0 el0t_64_sync+0x170/0x174 Fix the issue by removing the runtime PM calls completely. They are not needed here because it must have already been done when building the path for a trace. Fixes: 835d722ba10a ("coresight: cti: Initial CoreSight CTI Driver") Reported-by: Aishwarya TCV <Aishwarya.TCV(a)arm.com> Reported-by: Cristian Marussi <Cristian.Marussi(a)arm.com> Suggested-by: Suzuki K Poulose <suzuki.poulose(a)arm.com> Signed-off-by: James Clark <james.clark(a)arm.com> Reviewed-by: Mike Leach <mike.leach(a)linaro.org> Tested-by: Mike Leach <mike.leach(a)linaro.org> [ Fix build warnings ] Signed-off-by: Suzuki K Poulose <suzuki.poulose(a)arm.com> --- Greg, Please could you apply this patch to your tree. Thanks Suzuki Changes since previous posting: - Fix build warnings with 'unused variable' --- drivers/hwtracing/coresight/coresight-cti-core.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-cti-core.c b/drivers/hwtracing/coresight/coresight-cti-core.c index 1be92342b5b9..c6e8c6542f24 100644 --- a/drivers/hwtracing/coresight/coresight-cti-core.c +++ b/drivers/hwtracing/coresight/coresight-cti-core.c @@ -90,11 +90,9 @@ void cti_write_all_hw_regs(struct cti_drvdata *drvdata) static int cti_enable_hw(struct cti_drvdata *drvdata) { struct cti_config *config = &drvdata->config; - struct device *dev = &drvdata->csdev->dev; unsigned long flags; int rc = 0; - pm_runtime_get_sync(dev->parent); spin_lock_irqsave(&drvdata->spinlock, flags); /* no need to do anything if enabled or unpowered*/ @@ -119,7 +117,6 @@ static int cti_enable_hw(struct cti_drvdata *drvdata) /* cannot enable due to error */ cti_err_not_enabled: spin_unlock_irqrestore(&drvdata->spinlock, flags); - pm_runtime_put(dev->parent); return rc; } @@ -153,7 +150,6 @@ static void cti_cpuhp_enable_hw(struct cti_drvdata *drvdata) static int cti_disable_hw(struct cti_drvdata *drvdata) { struct cti_config *config = &drvdata->config; - struct device *dev = &drvdata->csdev->dev; struct coresight_device *csdev = drvdata->csdev; spin_lock(&drvdata->spinlock); @@ -175,7 +171,6 @@ 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->parent); return 0; /* not disabled this call */ -- 2.37.3

3 years, 1 month

Re: [PATCH] coresight: cti: Remove unused variables in cti_{dis,en}able_hw()

by Suzuki K Poulose

Hi Nathan On 24/10/2022 16:12, Nathan Chancellor wrote: > Clean up the following warnings, as the variables are no longer used. > > drivers/hwtracing/coresight/coresight-cti-core.c:93:17: warning: unused variable 'dev' [-Wunused-variable] > struct device *dev = &drvdata->csdev->dev; > ^ > drivers/hwtracing/coresight/coresight-cti-core.c:154:17: warning: unused variable 'dev' [-Wunused-variable] > struct device *dev = &drvdata->csdev->dev; > ^ > 2 warnings generated. > > Fixes: 665c157e0204 ("coresight: cti: Fix hang in cti_disable_hw()") > Signed-off-by: Nathan Chancellor <nathan(a)kernel.org> Thanks for your patch, this is now reverted upstream. I have queued a patch locally to sqaush the changes and plan to push it once the revert lands upstream. Thanks Suzuki

3 years, 1 month

[PATCH V10 0/2] Add support for UltraSoc System Memory Buffer

by Junhao He

Add support for UltraSoc System Memory Buffer. Change since v9: - Update the Contact tag in SMB document. - Replace the spinlock with mutex. - Do some clean-ups in "smb_enable()" and "smb_release()". - Use classic memory mapped interface. - Link: https://lore.kernel.org/linux-arm-kernel/20220818132231.28240-1-hejunhao3@h… Change since v8: - Insert a blank line at the end of the config tag in Kconfig. - Fix the "llseek" initialization. - Link: https://lore.kernel.org/linux-arm-kernel/20220816131634.38195-1-hejunhao3@h… Change since v7: - Use the macros for register bit flags and numbers of resource. - Fix punctuation. - Update the Date tag and the KernelVersion tag in the document. - Link: https://lore.kernel.org/lkml/20220712091353.34540-1-hejunhao3@huawei.com/ Change since v6: - Modify the code style and driver description according to Suzuki's comment. - Modify configuration of "drvdata->reading", to void problems in open/read concurrency scenario. - Rename the macro of "SMB_FLOW_MASK". - Use the "handle->head" to determine the page number and offset. - Link: https://lore.kernel.org/linux-arm-kernel/20220606130223.57354-1-liuqi115@hu… Change since v5: - Address the comments from Suzuki, add some comments in SMB document, and modify configuration of "drvdata->reading", to void problems in multi-core concurrency scenario - Link: https://lore.kernel.org/linux-arm-kernel/20220416083953.52610-1-liuqi115@hu… Change since v4: - Add a simple document of SMB driver according to Suzuki's comment. - Address the comments from Suzuki. - Link: https://lore.kernel.org/linux-arm-kernel/20220128061755.31909-1-liuqi115@hu… Change since v3: - Modify the file header according to community specifications. - Address the comments from Mathieu. - Link: https://lore.kernel.org/linux-arm-kernel/20211118110016.40398-1-liuqi115@hu… Change since v2: - Move ultrasoc driver to drivers/hwtracing/coresight. - Link: https://lists.linaro.org/pipermail/coresight/2021-November/007310.html Change since v1: - Drop the document of UltraSoc according to Mathieu's comment. - Add comments to explain some private hardware settings. - Address the comments from Mathieu. - Link: https://lists.linaro.org/pipermail/coresight/2021-August/006842.html Change since RFC: - Move driver to drivers/hwtracing/coresight/ultrasoc. - Remove ultrasoc-axi-com.c, as AXI-COM doesn't need to be configured in basic tracing function. - Remove ultrasoc.c as SMB does not need to register with the ultrasoc core. - Address the comments from Mathieu and Suzuki. - Link: https://lists.linaro.org/pipermail/coresight/2021-June/006535.html Qi Liu (2): drivers/coresight: Add UltraSoc System Memory Buffer driver Documentation: Add document for UltraSoc SMB drivers .../sysfs-bus-coresight-devices-ultra_smb | 31 + .../trace/coresight/ultrasoc-smb.rst | 80 +++ drivers/hwtracing/coresight/Kconfig | 11 + drivers/hwtracing/coresight/Makefile | 1 + drivers/hwtracing/coresight/ultrasoc-smb.c | 635 ++++++++++++++++++ drivers/hwtracing/coresight/ultrasoc-smb.h | 116 ++++ 6 files changed, 874 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-ultra_smb create mode 100644 Documentation/trace/coresight/ultrasoc-smb.rst create mode 100644 drivers/hwtracing/coresight/ultrasoc-smb.c create mode 100644 drivers/hwtracing/coresight/ultrasoc-smb.h -- 2.33.0

3 years, 1 month

[GIT PULL v2] coresight: Fixes for v6.1

by Suzuki K Poulose

Hi Greg, Please find a couple of fixes for coresight subsystem. I have addressed your comments from the previous post : - Removed 2 patches that were not really critical for v6.1 - Fixes tag is added - Fixed git repo URL. Please pull. Thanks Suzuki The following changes since commit 9abf2313adc1ca1b6180c508c25f22f9395cc780: Linux 6.1-rc1 (2022-10-16 15:36:24 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git tags/coresight-fixes-v6.1-1 for you to fetch changes up to 665c157e0204176023860b51a46528ba0ba62c33: coresight: cti: Fix hang in cti_disable_hw() (2022-10-20 22:34:23 +0100) ---------------------------------------------------------------- coresight: Fixes for v6.1 Fixes for coresight drivers for v6.1 - Fix possible deadlock CTI mutexes (LOCKDEP) - Fix hang in CTI with runtime power management Signed-off-by: Suzuki K Poulose <suzuki.poulose(a)arm.com> ---------------------------------------------------------------- James Clark (1): coresight: cti: Fix hang in cti_disable_hw() Sudeep Holla (1): coresight: Fix possible deadlock with lock dependency drivers/hwtracing/coresight/coresight-core.c | 7 ++++--- drivers/hwtracing/coresight/coresight-cti-core.c | 8 +++----- 2 files changed, 7 insertions(+), 8 deletions(-)

3 years, 1 month

Re: [GIT PULL] coresight: Fixes for v6.1

by Suzuki K Poulose

Greg On 20/10/2022 09:43, Greg KH wrote: > On Thu, Oct 20, 2022 at 10:41:07AM +0200, Greg KH wrote: >> On Wed, Oct 19, 2022 at 10:31:18PM +0100, Suzuki K Poulose wrote: >>> Greg, >>> >>> Please find some of the fixes coresight drivers for v6.1. >>> The important ones are a couple for the CTI driver which >>> could cause hangs on a system with tracing. >>> >>> Please pull, >>> Suzuki >>> >>> >>> The following changes since commit 9abf2313adc1ca1b6180c508c25f22f9395cc780: >>> >>> Linux 6.1-rc1 (2022-10-16 15:36:24 -0700) >>> >>> are available in the Git repository at: >>> >>> git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git tags/coresight-fixes-v6.1-1 > > Nit, this is not a valid URL to pull from. Please fix for your next > submission. > > >>> >>> for you to fetch changes up to 262068519b562dcf73297b2a75fb850342ba99e5: >>> >>> coresight: cti: Fix hang in cti_disable_hw() (2022-10-19 15:47:53 +0100) >>> >>> ---------------------------------------------------------------- >>> coresight: Fixes for v6.1 >>> >>> Fixes for coresight drivers for v6.1 >>> >>> - Fix possible deadlock CTI mutexes (LOCKDEP) >>> - Fix hang in CTI with runtime power management >>> - Fix grammars in a comment >>> - Use sysfs_emit() instead of scnprintf() >> >> Sorry, but patch 2 here, doing the sysfs_emit() is not allowed. That >> user has been banned from lore.kernel.org for sending patches through a >> random gmail account with no verification that they really are from ZTE >> at all. Until we get proof from ZTE that this developer really is who >> they say they are, we can't take patches from them. >> >> Please do not take any future patches from anyone sending from gmail.com >> that purports to be from ZTE until this is worked out. >> >> Also, it's not a "fix" at all, and shouldn't be needed for 6.1-final at >> all. >> >> I'll just drop that patch and regenerate this on my end to get the 3 >> other fixes merged in here properly. > > I'll also drop the grammer "fix" in here too, that's not needed for > 6.1-final. > > Also, the two other commits in here, do they need to go to stable trees? > I see no "Fixes:" or "cc: stable" markings on them at all. > > How about you just regenerate the pull request with just the 2 patches > here that are valid and put proper Fixes: tags on them, then send me a > fixed up pull request. Sure, will do that. Thanks for the feedback ! I will take care of your points in the future submissions. Cheers Suzuki

3 years, 1 month

[GIT PULL] coresight: Fixes for v6.1

by Suzuki K Poulose

Greg, Please find some of the fixes coresight drivers for v6.1. The important ones are a couple for the CTI driver which could cause hangs on a system with tracing. Please pull, Suzuki The following changes since commit 9abf2313adc1ca1b6180c508c25f22f9395cc780: Linux 6.1-rc1 (2022-10-16 15:36:24 -0700) are available in the Git repository at: git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git tags/coresight-fixes-v6.1-1 for you to fetch changes up to 262068519b562dcf73297b2a75fb850342ba99e5: coresight: cti: Fix hang in cti_disable_hw() (2022-10-19 15:47:53 +0100) ---------------------------------------------------------------- coresight: Fixes for v6.1 Fixes for coresight drivers for v6.1 - Fix possible deadlock CTI mutexes (LOCKDEP) - Fix hang in CTI with runtime power management - Fix grammars in a comment - Use sysfs_emit() instead of scnprintf() Signed-off-by: Suzuki K Poulose <suzuki.poulose(a)arm.com> ---------------------------------------------------------------- James Clark (1): coresight: cti: Fix hang in cti_disable_hw() Jilin Yuan (1): coresight: etm4x: fix repeated words in comments Sudeep Holla (1): coresight: Fix possible deadlock with lock dependency zhang songyi (1): coresight: use sysfs_emit() to instead of scnprintf() drivers/hwtracing/coresight/coresight-core.c | 7 ++++--- drivers/hwtracing/coresight/coresight-cti-core.c | 8 +++----- drivers/hwtracing/coresight/coresight-etm4x-core.c | 2 +- drivers/hwtracing/coresight/coresight-stm.c | 8 ++++---- 4 files changed, 12 insertions(+), 13 deletions(-)

3 years, 1 month

[PATCH v9 00/13] perf: test: Add trace data quality tests for CoreSight

by carsten.haitzler＠foss.arm.com

From: Carsten Haitzler <carsten.haitzler(a)arm.com> This series adds more test cases to perf test as well as new infrastructure for testing coresight data quality to ensure the data coming out of the kernel via perf actually contains useful information. Signed-off-by: Carsten Haitzler <carsten.haitzler(a)arm.com> Carsten Haitzler (13): perf test: Add CoreSight shell lib shared code for future tests perf test: Add build infra for perf test tools for CoreSight tests perf test: Add asm pureloop test tool perf test: Add asm pureloop test shell script perf test: Add git ignore for perf data generated by the CoreSight tests perf test: Add memcpy thread test tool perf test: Add memcpy thread test shell script perf test: Add thread loop test tool perf test: Add thread loop test shell scripts perf test: Add unroll thread test tool perf test: Add unroll thread test shell script perf test: Add git ignore for tmp and output files of CoreSight tests perf test: Add relevant documentation about CoreSight testing .../trace/coresight/coresight-perf.rst | 158 ++++++++++++++++++ MAINTAINERS | 1 + tools/perf/.gitignore | 6 +- .../perf/Documentation/perf-arm-coresight.txt | 5 + tools/perf/Makefile.config | 2 + tools/perf/Makefile.perf | 15 +- tools/perf/tests/shell/coresight/Makefile | 29 ++++ .../tests/shell/coresight/Makefile.miniconfig | 14 ++ .../tests/shell/coresight/asm_pure_loop.sh | 18 ++ .../shell/coresight/asm_pure_loop/.gitignore | 1 + .../shell/coresight/asm_pure_loop/Makefile | 34 ++++ .../coresight/asm_pure_loop/asm_pure_loop.S | 28 ++++ .../shell/coresight/memcpy_thread/.gitignore | 1 + .../shell/coresight/memcpy_thread/Makefile | 33 ++++ .../coresight/memcpy_thread/memcpy_thread.c | 79 +++++++++ .../shell/coresight/memcpy_thread_16k_10.sh | 18 ++ .../shell/coresight/thread_loop/.gitignore | 1 + .../shell/coresight/thread_loop/Makefile | 33 ++++ .../shell/coresight/thread_loop/thread_loop.c | 86 ++++++++++ .../coresight/thread_loop_check_tid_10.sh | 19 +++ .../coresight/thread_loop_check_tid_2.sh | 19 +++ .../coresight/unroll_loop_thread/.gitignore | 1 + .../coresight/unroll_loop_thread/Makefile | 33 ++++ .../unroll_loop_thread/unroll_loop_thread.c | 74 ++++++++ .../shell/coresight/unroll_loop_thread_10.sh | 18 ++ tools/perf/tests/shell/lib/coresight.sh | 132 +++++++++++++++ 26 files changed, 854 insertions(+), 4 deletions(-) create mode 100644 Documentation/trace/coresight/coresight-perf.rst create mode 100644 tools/perf/Documentation/perf-arm-coresight.txt create mode 100644 tools/perf/tests/shell/coresight/Makefile create mode 100644 tools/perf/tests/shell/coresight/Makefile.miniconfig create mode 100755 tools/perf/tests/shell/coresight/asm_pure_loop.sh create mode 100644 tools/perf/tests/shell/coresight/asm_pure_loop/.gitignore create mode 100644 tools/perf/tests/shell/coresight/asm_pure_loop/Makefile create mode 100644 tools/perf/tests/shell/coresight/asm_pure_loop/asm_pure_loop.S create mode 100644 tools/perf/tests/shell/coresight/memcpy_thread/.gitignore create mode 100644 tools/perf/tests/shell/coresight/memcpy_thread/Makefile create mode 100644 tools/perf/tests/shell/coresight/memcpy_thread/memcpy_thread.c create mode 100755 tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh create mode 100644 tools/perf/tests/shell/coresight/thread_loop/.gitignore create mode 100644 tools/perf/tests/shell/coresight/thread_loop/Makefile create mode 100644 tools/perf/tests/shell/coresight/thread_loop/thread_loop.c create mode 100755 tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh create mode 100755 tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh create mode 100644 tools/perf/tests/shell/coresight/unroll_loop_thread/.gitignore create mode 100644 tools/perf/tests/shell/coresight/unroll_loop_thread/Makefile create mode 100644 tools/perf/tests/shell/coresight/unroll_loop_thread/unroll_loop_thread.c create mode 100755 tools/perf/tests/shell/coresight/unroll_loop_thread_10.sh create mode 100644 tools/perf/tests/shell/lib/coresight.sh -- 2.32.0

3 years, 1 month

[PATCH] coresight: cti: Fix hang in cti_disable_hw()

by James Clark

cti_enable_hw() and cti_disable_hw() are called from an atomic context so shouldn't use runtime PM because it can result in a sleep when communicating with firmware. Since commit 3c6656337852 ("Revert "firmware: arm_scmi: Add clock management to the SCMI power domain""), this causes a hang on Juno when running the Perf Coresight tests or running this command: perf record -e cs_etm//u -- ls This was also missed until the revert commit because pm_runtime_put() was called with the wrong device until commit 692c9a499b28 ("coresight: cti: Correct the parameter for pm_runtime_put") With lock and scheduler debugging enabled the following is output: coresight cti_sys0: cti_enable_hw -- dev:cti_sys0 parent: 20020000.cti BUG: sleeping function called from invalid context at drivers/base/power/runtime.c:1151 in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 330, name: perf-exec preempt_count: 2, expected: 0 RCU nest depth: 0, expected: 0 INFO: lockdep is turned off. irq event stamp: 0 hardirqs last enabled at (0): [<0000000000000000>] 0x0 hardirqs last disabled at (0): [<ffff80000822b394>] copy_process+0xa0c/0x1948 softirqs last enabled at (0): [<ffff80000822b394>] copy_process+0xa0c/0x1948 softirqs last disabled at (0): [<0000000000000000>] 0x0 CPU: 3 PID: 330 Comm: perf-exec Not tainted 6.0.0-00053-g042116d99298 #7 Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II Sep 13 2022 Call trace: dump_backtrace+0x134/0x140 show_stack+0x20/0x58 dump_stack_lvl+0x8c/0xb8 dump_stack+0x18/0x34 __might_resched+0x180/0x228 __might_sleep+0x50/0x88 __pm_runtime_resume+0xac/0xb0 cti_enable+0x44/0x120 coresight_control_assoc_ectdev+0xc0/0x150 coresight_enable_path+0xb4/0x288 etm_event_start+0x138/0x170 etm_event_add+0x48/0x70 event_sched_in.isra.122+0xb4/0x280 merge_sched_in+0x1fc/0x3d0 visit_groups_merge.constprop.137+0x16c/0x4b0 ctx_sched_in+0x114/0x1f0 perf_event_sched_in+0x60/0x90 ctx_resched+0x68/0xb0 perf_event_exec+0x138/0x508 begin_new_exec+0x52c/0xd40 load_elf_binary+0x6b8/0x17d0 bprm_execve+0x360/0x7f8 do_execveat_common.isra.47+0x218/0x238 __arm64_sys_execve+0x48/0x60 invoke_syscall+0x4c/0x110 el0_svc_common.constprop.4+0xfc/0x120 do_el0_svc+0x34/0xc0 el0_svc+0x40/0x98 el0t_64_sync_handler+0x98/0xc0 el0t_64_sync+0x170/0x174 Fix the issue by removing the runtime PM calls completely. They are not needed here because it must have already been done when building the path for a trace. Fixes: 835d722ba10a ("coresight: cti: Initial CoreSight CTI Driver") Reported-by: Aishwarya TCV <Aishwarya.TCV(a)arm.com> Reported-by: Cristian Marussi <Cristian.Marussi(a)arm.com> Signed-off-by: Suzuki Poulose <Suzuki.Poulose(a)arm.com> Signed-off-by: James Clark <james.clark(a)arm.com> --- drivers/hwtracing/coresight/coresight-cti-core.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-cti-core.c b/drivers/hwtracing/coresight/coresight-cti-core.c index 8988b2ed2ea6..c5f7fc4e2552 100644 --- a/drivers/hwtracing/coresight/coresight-cti-core.c +++ b/drivers/hwtracing/coresight/coresight-cti-core.c @@ -94,7 +94,6 @@ static int cti_enable_hw(struct cti_drvdata *drvdata) unsigned long flags; int rc = 0; - pm_runtime_get_sync(dev->parent); spin_lock_irqsave(&drvdata->spinlock, flags); /* no need to do anything if enabled or unpowered*/ @@ -119,7 +118,6 @@ static int cti_enable_hw(struct cti_drvdata *drvdata) /* cannot enable due to error */ cti_err_not_enabled: spin_unlock_irqrestore(&drvdata->spinlock, flags); - pm_runtime_put(dev->parent); return rc; } @@ -175,7 +173,6 @@ 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->parent); return 0; /* not disabled this call */ -- 2.28.0

3 years, 1 month

Re: [PATCH] coresight: etm4x: fix repeated words in comments

by Suzuki K Poulose

On 19/10/2022 13:49, Jilin Yuan wrote: > Delete the redundant word 'the'. > > Signed-off-by: Jilin Yuan <yuanjilin(a)cdjrlc.com> Thanks, Queued. > --- > 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 80fefaba58ee..849c563cfc65 100644 > --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c > +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c > @@ -1478,7 +1478,7 @@ static int etm4_set_event_filters(struct etmv4_drvdata *drvdata, > /* > * If filters::ssstatus == 1, trace acquisition was > * started but the process was yanked away before the > - * the stop address was hit. As such the start/stop > + * stop address was hit. As such the start/stop > * logic needs to be re-started so that tracing can > * resume where it left. > *

3 years, 1 month

Jump to page:

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

CoreSight