Comment 2 for bug 1841490

Verification:

ubuntu@d06-2:~$ cat /proc/version
Linux version 5.0.0-28-generic (buildd@bos02-arm64-078) (gcc version 8.3.0 (Ubuntu/Linaro 8.3.0-6ubuntu1)) #30-Ubuntu SMP Wed Sep 4 11:48:26 UTC 2019
ubuntu@d06-2:~$ sudo perf record -e arm_spe/ts_enable=1,pa_enable=1/ dd if=/dev/zero of=/dev/null count=10000
10000+0 records in
10000+0 records out
5120000 bytes (5.1 MB, 4.9 MiB) copied, 0.0179591 s, 285 MB/s
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.233 MB perf.data ]
ubuntu@d06-2:~$
ubuntu@d06-2:~$
ubuntu@d06-2:~$ sudo perf report --dump-raw-trace
# To display the perf.data header info, please use --header/--header-only options.
#

0x768 [0x20]: event: 70
.
. ... raw event: size 32 bytes
. 0000: 46 00 00 00 00 00 20 00 04 00 00 00 00 00 00 00 F..... .........
. 0010: 39 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 9...............

0 0 0x768 [0x20]: PERF_RECORD_AUXTRACE_INFO type: 4
  PMU Type 57

0x788 [0x60]: event: 1
.
. ... raw event: size 96 bytes
. 0000: 01 00 00 00 01 00 60 00 ff ff ff ff 00 00 00 00 ......`.........
. 0010: 00 00 08 10 00 00 ff ff ff ff f7 ef ff ff 00 00 ................
. 0020: 00 00 08 10 00 00 ff ff 5b 6b 65 72 6e 65 6c 2e ........[kernel.
. 0030: 6b 61 6c 6c 73 79 6d 73 5d 5f 74 65 78 74 00 00 kallsyms]_text..
. 0040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
. 0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

0 0 0x788 [0x60]: PERF_RECORD_MMAP -1/0: [0xffff000010080000(0xffffeff7ffff) @ 0xffff000010080000]: x [kernel.kal
...skipping...
. ... ARM SPE data: size 1272808 bytes
. 00000000: b0 20 cb 24 10 00 00 ff c0 PC 0xff00001024cb20 el2 ns=1
. 00000009: 99 08 00 LAT 8 ISSUE
. 0000000c: 98 0a 00 LAT 10 TOT
. 0000000f: 52 16 00 EV RETIRED L1D-ACCESS TLB-ACCESS