CoreSight

coresight@lists.linaro.org

6 participants
2469 discussions

[RFC PATCH v2 0/5] Allow CoreSight to specify and select default sink

by Mike Leach

This patchset provides a proposed infrastructure to allow for the automatic selection of a sink during CoreSight tracing operations. Currently starting tracing using perf requires a sink selection on the command line:- sudo ./perf record -e cs_etm/@tmc_etr0/ --per-thread uname -a After this set the infrastructure will be able to select a default sink:- sudo ./perf record -e cs_etm// --per-thread uname -a This matches with the default operation provided with perf and intelpt. The CoreSight infrastructure is updated with the concept of a sink_select_priority value used when sinks are registered with the system. Where no sink is specified at the start of a trace session, the CoreSight system will walk the connection graph from the source ETM, to find a suitable sink using the first encountered highest priority device. Sinks set a value during component registration, ETR the highest priority, ETB and ETF a lower priority. Thus the first ETR if present will be used, otherwise fallback to the first encountered ETF/ETB. The automatic sink selection will also operate if an ETM is enabled using sysfs commands, and no sink is currently enabled. Applied to Linux 5.7-rc3. Changes since v1: 1) Dropped the device-tree attribute labelling of sinks for selection and implemented the priority schema preferring first encountered ETR, after mailing list discussions. 2) Added in sysfs support for auto sink selection. Mike Leach (5): coresight: Add default sink selection to CoreSight base coresight: tmc: Add default sink selection priorities. coresight: etm: perf: Add default sink selection to etm perf coresight: sysfs: Allow select default sink on source enable. perf: cs-etm: Allow no CoreSight sink to be specified on command line .../hwtracing/coresight/coresight-etm-perf.c | 20 ++++- drivers/hwtracing/coresight/coresight-priv.h | 2 + drivers/hwtracing/coresight/coresight-tmc.c | 5 ++ drivers/hwtracing/coresight/coresight.c | 87 ++++++++++++++++++- include/linux/coresight.h | 10 ++- tools/perf/arch/arm/util/cs-etm.c | 6 +- 6 files changed, 121 insertions(+), 9 deletions(-) -- 2.17.1

5 years, 4 months

[PATCH v2] perf: cs-etm: Update to build with latest opencsd version.

by Mike Leach

OpenCSD version v0.14.0 adds in a new output element. This is represented by a new value in the generic element type enum, which must be added to the handling code in perf cs-etm-decoder to prevent build errors due to build options on the perf project. This element is not currently used by the perf decoder. Perf build feature test updated to require a minimum of 0.14.0 Tested on Linux 5.7-rc3. Signed-off-by: Mike Leach <mike.leach(a)linaro.org> --- tools/build/feature/test-libopencsd.c | 4 ++-- tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 2 ++ 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/tools/build/feature/test-libopencsd.c b/tools/build/feature/test-libopencsd.c index 2b0e02c38870..1547bc2c0950 100644 --- a/tools/build/feature/test-libopencsd.c +++ b/tools/build/feature/test-libopencsd.c @@ -4,9 +4,9 @@ /* * Check OpenCSD library version is sufficient to provide required features */ -#define OCSD_MIN_VER ((0 << 16) | (11 << 8) | (0)) +#define OCSD_MIN_VER ((0 << 16) | (14 << 8) | (0)) #if !defined(OCSD_VER_NUM) || (OCSD_VER_NUM < OCSD_MIN_VER) -#error "OpenCSD >= 0.11.0 is required" +#error "OpenCSD >= 0.14.0 is required" #endif int main(void) diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c index cd92a99eb89d..cd007cc9c283 100644 --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c @@ -564,6 +564,8 @@ static ocsd_datapath_resp_t cs_etm_decoder__gen_trace_elem_printer( resp = cs_etm_decoder__set_tid(etmq, packet_queue, elem, trace_chan_id); break; + /* Unused packet types */ + case OCSD_GEN_TRC_ELEM_I_RANGE_NOPATH: case OCSD_GEN_TRC_ELEM_ADDR_NACC: case OCSD_GEN_TRC_ELEM_CYCLE_COUNT: case OCSD_GEN_TRC_ELEM_ADDR_UNKNOWN: -- 2.17.1

5 years, 4 months

Re:😷 COVID-19: PPE Stock in Los Angeles

by Hugo

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5 years, 4 months

[PATCH v2 0/2] Add CPU power management for CPU bound CTI devices.

by Mike Leach

Adds in power management for CPU bound CTI devices: i) CPU Hotplug - registers a new notifier for CPU start and stop events. ii) CPU idle PM event notifier to handle PM_ENTER, PM_ENTER_FAILED and PM_EXIT events. Tested with DB410c on Linux 5.7-rc3. Rebased onto coresight/next Changes since V1: (requested by Mathieu). 1) Split into separate patches for CPU pm and CPU hotplug handling. 2) Enable on hotplug has a specific function to enable the hardware, while leaving the enable reference counts unchanged. Mike Leach (2): coresight: cti: Add CPU Hotplug handling to CTI driver. coresight: cti: Add CPU idle pm notifer to CTI devices. drivers/hwtracing/coresight/coresight-cti.c | 173 ++++++++++++++++++++ include/linux/cpuhotplug.h | 1 + 2 files changed, 174 insertions(+) -- 2.17.1

5 years, 4 months

[PATCH 86/91] perf: cs-etm: Update to build with latest opencsd version.

by Arnaldo Carvalho de Melo

From: Mike Leach <mike.leach(a)linaro.org> OpenCSD version v0.14.0 adds in a new output element. This is represented by a new value in the generic element type enum, which must be added to the handling code in perf cs-etm-decoder to prevent build errors due to build options on the perf project. This element is not currently used by the perf decoder. Perf build feature test updated to require a minimum of 0.14.0 Tested on Linux 5.7-rc3. Signed-off-by: Mike Leach <mike.leach(a)linaro.org> Reviewed-by: Leo Yan <leo.yan(a)linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier(a)linaro.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: Suzuki Poulouse <suzuki.poulose(a)arm.com> Cc: coresight(a)lists.linaro.org Cc: linux-arm-kernel(a)lists.infradead.org Link: http://lore.kernel.org/lkml/20200501143615.1180-1-mike.leach@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme(a)redhat.com> --- tools/build/feature/test-libopencsd.c | 4 ++-- tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 2 ++ 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/tools/build/feature/test-libopencsd.c b/tools/build/feature/test-libopencsd.c index 2b0e02c38870..1547bc2c0950 100644 --- a/tools/build/feature/test-libopencsd.c +++ b/tools/build/feature/test-libopencsd.c @@ -4,9 +4,9 @@ /* * Check OpenCSD library version is sufficient to provide required features */ -#define OCSD_MIN_VER ((0 << 16) | (11 << 8) | (0)) +#define OCSD_MIN_VER ((0 << 16) | (14 << 8) | (0)) #if !defined(OCSD_VER_NUM) || (OCSD_VER_NUM < OCSD_MIN_VER) -#error "OpenCSD >= 0.11.0 is required" +#error "OpenCSD >= 0.14.0 is required" #endif int main(void) diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c index cd92a99eb89d..cd007cc9c283 100644 --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c @@ -564,6 +564,8 @@ static ocsd_datapath_resp_t cs_etm_decoder__gen_trace_elem_printer( resp = cs_etm_decoder__set_tid(etmq, packet_queue, elem, trace_chan_id); break; + /* Unused packet types */ + case OCSD_GEN_TRC_ELEM_I_RANGE_NOPATH: case OCSD_GEN_TRC_ELEM_ADDR_NACC: case OCSD_GEN_TRC_ELEM_CYCLE_COUNT: case OCSD_GEN_TRC_ELEM_ADDR_UNKNOWN: -- 2.21.1

5 years, 4 months

KASAN use-after-free bug and a warning in etm4_cpu_pm_notify() with "arm,coresight-loses-context-with-cpu"

by Sai Prakash Ranjan

Hi, Since adding "arm,coresight-loses-context-with-cpu" property, have been seeing warnings during boot on QCOM SC7180, one is the kasan use-after-free warning in etm4_cpu_pm_notify() and the other warning also in etm4_cpu_pm_notify(). 1) KASAN use-after-free bug in etm4_cpu_pm_notify(): [ 8.574566] coresight etm0: CPU0: ETM v4.2 initialized [ 8.581920] BUG: KASAN: use-after-free in etm4_cpu_pm_notify+0x580/0x2024 [ 8.581925] Read of size 8 at addr ffffff813304f8c8 by task swapper/3/0 [ 8.581927] [ 8.581934] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G S W 5.4.28 #314 [ 8.587775] coresight etm1: CPU1: ETM v4.2 initialized [ 8.594195] Call trace: [ 8.594205] dump_backtrace+0x0/0x188 [ 8.594209] show_stack+0x20/0x2c [ 8.594216] dump_stack+0xdc/0x144 [ 8.594227] print_address_description+0x3c/0x494 [ 8.594232] __kasan_report+0x144/0x168 [ 8.601598] coresight etm2: CPU2: ETM v4.2 initialized [ 8.602563] kasan_report+0x10/0x18 [ 8.602568] check_memory_region+0x1a4/0x1b4 [ 8.602572] __kasan_check_read+0x18/0x24 [ 8.602577] etm4_cpu_pm_notify+0x580/0x2024 [ 8.665945] notifier_call_chain+0x5c/0x90 [ 8.670166] __atomic_notifier_call_chain+0x90/0xf8 [ 8.675182] cpu_pm_notify+0x40/0x6c [ 8.678858] cpu_pm_enter+0x38/0x80 [ 8.682451] psci_enter_idle_state+0x34/0x70 [ 8.686844] cpuidle_enter_state+0xb8/0x20c [ 8.691143] cpuidle_enter+0x38/0x4c [ 8.694820] call_cpuidle+0x3c/0x68 [ 8.698408] do_idle+0x1a0/0x280 [ 8.701729] cpu_startup_entry+0x24/0x28 [ 8.705768] secondary_start_kernel+0x15c/0x170 [ 8.710423] [ 8.711972] Allocated by task 242: [ 8.715473] __kasan_kmalloc+0xf0/0x1ac [ 8.719426] kasan_slab_alloc+0x14/0x1c [ 8.723375] __kmalloc_track_caller+0x23c/0x388 [ 8.728040] devm_kmalloc+0x38/0x94 [ 8.731632] etm4_probe+0x48/0x3c8 [ 8.735140] amba_probe+0xbc/0x158 [ 8.738645] really_probe+0x144/0x408 [ 8.742412] driver_probe_device+0x70/0x140 [ 8.746716] __device_attach_driver+0x9c/0x110 [ 8.751287] bus_for_each_drv+0x90/0xd8 [ 8.755236] __device_attach+0xb4/0x164 [ 8.759188] device_initial_probe+0x20/0x2c [ 8.763490] bus_probe_device+0x34/0x94 [ 8.767436] device_add+0x34c/0x3e0 [ 8.771029] amba_device_try_add+0x68/0x440 [ 8.775332] amba_deferred_retry_func+0x48/0xc8 [ 8.779997] process_one_work+0x344/0x648 [ 8.784127] worker_thread+0x2ac/0x47c [ 8.787987] kthread+0x128/0x138 [ 8.791313] ret_from_fork+0x10/0x18 [ 8.794993] [ 8.796532] Freed by task 242: [ 8.799684] __kasan_slab_free+0x15c/0x22c [ 8.803897] kasan_slab_free+0x10/0x1c [ 8.807761] kfree+0x25c/0x4bc [ 8.810913] release_nodes+0x240/0x2b0 [ 8.814767] devres_release_all+0x3c/0x54 [ 8.818887] really_probe+0x178/0x408 [ 8.822661] driver_probe_device+0x70/0x140 [ 8.826963] __device_attach_driver+0x9c/0x110 [ 8.831539] bus_for_each_drv+0x90/0xd8 [ 8.835487] __device_attach+0xb4/0x164 [ 8.839431] device_initial_probe+0x20/0x2c [ 8.843732] bus_probe_device+0x34/0x94 [ 8.847678] device_add+0x34c/0x3e0 [ 8.851274] amba_device_try_add+0x68/0x440 [ 8.855576] amba_deferred_retry_func+0x48/0xc8 [ 8.860240] process_one_work+0x344/0x648 [ 8.864366] worker_thread+0x2ac/0x47c [ 8.868228] kthread+0x128/0x138 [ 8.871557] ret_from_fork+0x10/0x18 [ 8.875231] [ 8.876782] The buggy address belongs to the object at ffffff813304f800 [ 8.876782] which belongs to the cache kmalloc-1k of size 1024 [ 8.889632] The buggy address is located 200 bytes inside of [ 8.889632] 1024-byte region [ffffff813304f800, ffffff813304fc00) [ 8.901761] The buggy address belongs to the page: [ 8.906695] page:ffffffff04ac1200 refcount:1 mapcount:0 mapping:ffffff8146c03800 index:0x0 compound_mapcount: 0 [ 8.917047] flags: 0x4000000000010200(slab|head) [ 8.921799] raw: 4000000000010200 dead000000000100 dead000000000122 ffffff8146c03800 [ 8.929753] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 [ 8.937703] page dumped because: kasan: bad access detected [ 8.943433] [ 8.944974] Memory state around the buggy address: [ 8.949903] ffffff813304f780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 8.957320] ffffff813304f800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 8.964742] >ffffff813304f880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 8.972157] ^ [ 8.977886] ffffff813304f900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 8.985298] ffffff813304f980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 8.992713] ================================================================== [ 9.000577] coresight etm3: CPU3: ETM v4.2 initialized [ 9.006385] coresight etm4: CPU4: ETM v4.2 initialized [ 9.012203] coresight etm5: CPU5: ETM v4.2 initialized [ 9.018126] coresight etm6: CPU6: ETM v4.2 initialized [ 9.023906] coresight etm7: CPU7: ETM v4.2 initialized 2) WARN_ON_ONCE(drvdata->cpu != cpu) in etm4_cpu_pm_notify(): 6.219155] WARNING: CPU: 3 PID: 0 at v5.4/drivers/hwtracing/coresight/coresight-etm4x.c:1347 etm4_cpu_pm_notify+0x1708/0x1c24 [ 6.219156] Modules linked in: [ 6.219163] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G S 5.4.35 #1 [ 6.219168] pstate: 20c00089 (nzCv daIf +PAN +UAO) [ 6.219171] pc : etm4_cpu_pm_notify+0x1708/0x1c24 [ 6.219176] lr : notifier_call_chain+0x58/0x90 [ 6.219178] sp : ffffffc010213d80 [ 6.219179] x29: ffffffc010213d90 x28: 0000000000000000 [ 6.219182] x27: ffffffe5b7106138 x26: ffffffe5b7412000 [ 6.219185] x25: ffffffe5b7412148 x24: 0000000000000001 [ 6.219188] x23: 0000000000000000 x22: 6b6b6b6b6b6b6b6b [ 6.219191] x21: 0000000000000002 x20: 0000000000000002 [ 6.219194] x19: ffffff816d8a1080 x18: 0000000000000000 [ 6.219197] x17: 0000000000000000 x16: 0000000000000000 [ 6.219200] x15: 0000000000000000 x14: ffffff8175f164c0 [ 6.219203] x13: ffffff8001d39000 x12: 00000000000000f0 [ 6.219206] x11: 0000000000000020 x10: 00000000ffffffff [ 6.219208] x9 : 0000000070732f69 x8 : 0000000000000003 [ 6.219211] x7 : 000000b2b5593519 x6 : 00000000003033ff [ 6.219214] x5 : 0000000000000000 x4 : 0000000000000700 [ 6.219217] x3 : 00000000ffffffff x2 : 0000000000000000 [ 6.219219] x1 : 0000000000000002 x0 : ffffffe5b74f2a28 [ 6.219223] Call trace: [ 6.219226] etm4_cpu_pm_notify+0x1708/0x1c24 [ 6.219228] notifier_call_chain+0x58/0x90 [ 6.219231] __atomic_notifier_call_chain+0x48/0x68 [ 6.219236] cpu_pm_notify+0x40/0x6c [ 6.219239] cpu_pm_exit+0x1c/0x24 [ 6.219242] psci_enter_idle_state+0x4c/0x70 [ 6.219246] cpuidle_enter_state+0xb8/0x204 [ 6.219249] cpuidle_enter+0x38/0x4c [ 6.219254] do_idle+0x1a4/0x2a8 [ 6.219257] cpu_startup_entry+0x24/0x28 [ 6.219262] secondary_start_kernel+0x148/0x154 [ 6.219264] ---[ end trace 41dac5fc09746c13 ]--- Thanks, Sai -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

5 years, 4 months

货运通知

by SF EXPRESS

5 years, 4 months

😷 Urgent COVID-19: PPE / Masks

by Rod

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5 years, 4 months

Re: Urgent COVID-19: PPE / Masks

by Tony Beig

[DEFAULT_HEADER]Hello, I just wanted to reach out to you about the PPE stock we have in the USA (Los Angeles) right now. KN95 - 5 Layers - 300,000 KN95 - 4 Layers - 600,000 3Ply - 1.2 Million Take all or minimum 400,000 KN95 and 500,000 3Ply: $2.85 for KN95 and $.62 for 3Ply FOB LA. Individual price: KN95 - $2.95 3Ply - $.69 Masks are FDA Approved and very high quality and can be inspected at: Alanic International 8730 Wilshire Blvd, Penthouse Beverly Hills, CA 90211 Please call me on 310 596 5555 or 310 800 6438 or visit www.ppekits.net We can ship today or tomorrow. FDA Approved masks. We are FDA approved importer. Payment and P.O will be made to the company on FDA list. https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfRL/rl.cfm?rid=246905 Photo: https://www.dropbox.com/s/26h70sbdip0zy91/FDA%20KN951.png?dl=0 Thanks Tony; [DEFAULT_FOOTER]

5 years, 4 months

OpenCSD library for a Multi-Threaded application

by subhasish Karmakar

Hi, Can I use OpenCSD library in a Multi-Threaded application? I maintain decode tree handle per thread. Code Example:/********* Initialization code *********/ ------------------------------ //dcdtree_handle_ and p_context is maintained per thread dcdtree_handle_ = ocsd_create_dcd_tree(OCSD_TRC_SRC_FRAME_FORMATTED, OCSD_DFRMTR_FRAME_MEM_ALIGN); ret = ocsd_dt_create_decoder(dcdtree_handle_, p_name, OCSD_CREATE_FLG_FULL_DECODER, p_cfg, &CSID); ret = ocsd_dt_attach_packet_callback( dcdtree_handle_, CSID, OCSD_C_API_CB_PKT_MON, (void *)packetMonitorCallBack, p_context); ret = ocsd_dt_set_gen_elem_outfn( dcdtree_handle_, genTraceElemCallBack, p_context); ------------------------------ /********* Packet Processing *********/ ------------------------------ //Each thread uses below function to process incoming CoreSight packet while ((bytes_done < (uint32_t)block_size) && (ret == OCSD_OK)) { if (OCSD_DATA_RESP_IS_CONT(dp_ret)) { dp_ret = ocsd_dt_process_data( dcdtree_handle_, OCSD_OP_DATA, block_index + bytes_done, block_size - bytes_done, ((uint8_t *)p_block) + bytes_done, &bytes_this_time); //Example code from ------------------------------ Kindly respond to my query. Thank you, Subhasish

5 years, 4 months

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