I am currently working with a ZedBoard featuring the Zynq 700 and have enabled CoreSight components in the kernel features and device tree blob (DTB). I can confirm that I can view the CoreSight devices located in /sys/bus/.
However, I've encountered an issue when attempting to enable or disable CoreSight data dumps. The results are only producing minimal binary files.
ubuntu@arm:/sys/bus/coresight/devices$ ls -lh total 0 lrwxrwxrwx 1 root root 0 Mar 27 2023 etb0 -> ../../../devices/soc0/axi/f8801000.etb/etb0 lrwxrwxrwx 1 root root 0 Mar 27 2023 etm0 -> ../../../devices/soc0/axi/f889c000.ptm/etm0 lrwxrwxrwx 1 root root 0 Mar 27 2023 etm1 -> ../../../devices/soc0/axi/f889d000.ptm/etm1 lrwxrwxrwx 1 root root 0 Mar 27 2023 funnel0 -> ../../../devices/soc0/axi/f8804000.funnel/funnel0 lrwxrwxrwx 1 root root 0 Mar 27 2023 replicator0 -> ../../../devices/soc0/replicator/replicator0 lrwxrwxrwx 1 root root 0 Mar 27 2023 tpiu0 -> ../../../devices/soc0/axi/f8803000.tpiu/tpiu0
ubuntu@arm:/sys/bus/coresight/devices$ dmesg | grep coresight [ 1.578865] coresight etm0: PTM 1.0 initialized [ 1.584452] coresight etm1: PTM 1.0 initialized
ubuntu@arm:/sys/bus/coresight/devices$ dmesg | grep amba [ 0.033923] amba f8801000.etb: Fixed dependency cycle(s) with /replicator/out-ports/port@1/endpoint [ 0.034129] amba f8803000.tpiu: Fixed dependency cycle(s) with /replicator/out-ports/port@0/endpoint [ 0.034358] amba f8804000.funnel: Fixed dependency cycle(s) with /replicator/in-ports/port/endpoint [ 0.034571] amba f889c000.ptm: Fixed dependency cycle(s) with /axi/funnel@f8804000/in-ports/port@0/endpoint [ 0.034779] amba f889d000.ptm: Fixed dependency cycle(s) with /axi/funnel@f8804000/in-ports/port@1/endpoint
root@arm:/sys/bus/coresight/devices# echo 1 | sudo tee etb0/enable_sink 1 root@arm:/sys/bus/coresight/devices# echo 1 | sudo tee etm1/enable_source 1 root@arm:/sys/bus/coresight/devices# dd if=/dev/etb0 of=~/cstrace.bin 8+0 records in 8+0 records out 4096 bytes (4.1 kB, 4.0 KiB) copied, 0.00763361 s, 537 kB/s root@arm:~# hexdump -C cstrace.bin 00000000 ff ff ff 7f ff ff ff 7f ff ff ff 7f ff ff ff 7f |................| 00000010 25 86 d2 1f c4 8c 86 1a 8a e9 22 84 c4 a9 c8 4b |%........."....K| 00000020 02 c1 b0 e3 00 d1 a8 c8 02 e7 de a8 04 e0 8a 3b |...............;| 00000030 ce 18 8e c1 18 e5 22 88 ac e1 d6 03 de d7 a8 75 |......"........u| 00000040 04 86 f6 1f 8c 85 20 8c 0e ce 86 85 f6 c7 02 d2 |...... .........| 00000050 ea fe f0 00 8a b9 8e c8 02 84 4a f1 fe f0 00 31 |..........J....1| 00000060 a0 9d c0 d3 02 b4 fe 00 94 8d 00 dc 14 94 9a ee |................| 00000070 fc f0 00 b8 d6 c0 d2 03 9c 7f 94 8d 00 dc 14 cd |................| 00000080 94 c1 fa e0 00 8a b8 c3 22 f5 fe 22 ae fd 30 7a |........".."..0z| 00000090 25 8c 36 9a 44 ee 50 b8 f6 8e c8 03 a6 c9 00 9e |%.6.D.P.........| 000000a0 9c 55 84 59 92 0f c8 cc 9c a1 c8 e5 00 84 fc e4 |.U.Y............| 000000b0 96 c8 02 a8 ac 0f ea d4 ea fc ea d4 ec c4 b8 07 |................| 000000c0 ca 12 e6 f6 f2 cb fe f0 00 c2 9e e5 a6 3c e6 41 |.............<.A| 000000d0 84 f5 1a a2 da 1c f4 8c 8a f2 38 f0 94 bb 8e b6 |..........8.....| 000000e0 3a 88 56 b7 f2 39 84 f3 9c 3c a6 0d 9e ef 26 82 |:.V..9...<....&.| 000000f0 ca 98 da fe 30 98 f0 f6 c6 03 84 79 b0 cb de 9a |....0......y....| 00000100 a8 04 8c ad e0 d7 02 df d6 a8 04 86 d2 1f c4 5c |...............| 00000110 25 8c 86 1a 8a e9 22 84 c4 a9 c8 03 c0 b1 e2 d3 |%.....".........| 00000120 00 d1 a8 c8 02 e7 de a8 04 e0 8a cf 18 8e c0 8e |................| 00000130 18 e5 22 88 ac e1 d6 03 de d7 a8 04 86 f7 1e 9d |..".............| 00000140 8c 85 20 8c 0e ce 86 85 f6 c7 02 eb fe f0 00 34 |.. ............4| 00000150 8a b9 8e c8 02 84 4a f1 fe f0 00 a0 9c c1 d2 cc |......J.........| 00000160 02 b4 fe 00 94 8d 00 dc 14 94 9a fd f0 00 b8 3b |...............;| 00000170 d6 c0 d2 03 9c 7f 94 8d 00 dc 14 94 c0 fb e0 73 |...............s| 00000180 00 8a b8 c3 22 f5 fe 22 ae fd 30 8c 36 9a 44 de |....".."..0.6.D.| 00000190 25 ee 50 b8 f6 8e c8 03 a6 c9 00 9c 54 84 58 e6 |%.P.........T.X.| 000001a0 92 0f c8 cc 9c a1 c8 e5 00 84 fc 97 c8 03 a8 39 |...............9| 000001b0 ac 0f ea d4 ea fc ea d4 ec c4 b8 cb 12 e6 f6 01 |................| 000001c0 f2 cb fe f0 00 c2 9e e5 a6 3c e6 84 f4 1b a2 50 |.........<.....P| 000001d0 da 1c f4 8c 8a f2 38 f0 94 bb 8e 3a 88 57 b6 ad |......8....:.W..| 000001e0 f2 39 84 f3 9c 3c a6 0d 9e ef 26 ca 98 db fe 20 |.9...<....&.... | 000001f0 30 98 f0 f6 c6 03 84 79 b0 cb de a8 04 8c ac a6 |0......y........| 00000200 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00001000
With perf i get I get Error:70 Incomplete data
With Opencsd root@arm:/home/ubuntu/my-opencsd/decoder/tests/bin/builddir# ls -l /root/my/ total 8 -rw-r--r-- 1 root root 4096 Oct 10 07:11 cstrace.bin drwxr-xr-x 3 root root 4096 Sep 10 06:30 own
root@arm:/home/ubuntu/my-opencsd/decoder/tests/bin/builddir# ./trc_pkt_lister -ss_dir /root/my/ -decode Trace Packet Lister: CS Decode library testing -----------------------------------------------
** Library Version : 1.5.4
Test Command Line:- ./trc_pkt_lister -ss_dir /root/my/ -decode
Trace Packet Lister : reading snapshot from path /root/my/ Trace Packet Lister : Snapshot path/root/my/ not found