[Impact] perf support for the ARMv8.2 Statistical Profiling Extension does not work on ACPI platforms.
[Test Case] 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, 0.0201586 s, 254 MB/s [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.354 MB perf.data ] ubuntu@d06-2:~$ sudo perf report --dump-raw-trace [...] 0 0 0x4a90 [0x30]: PERF_RECORD_AUXTRACE size: 0x155fd0 offset: 0 ref: 0x226974 . . ... ARM SPE data: size 1400784 bytes . 00000000: b0 28 31 25 10 00 00 ff c0 PC 0xff00001025312 . 00000009: 99 07 00 LAT 7 ISSUE . 0000000c: 98 09 00 LAT 9 TOT . 0000000f: 52 16 00 EV RETIRED L1D-ACC [...]
[Fix] d482e575fbf0f perf: arm_spe: Enable ACPI/Platform automatic module loading d24a0c7099b32 arm_pmu: acpi: spe: Add initial MADT/SPE probing 56855a99f3d0d ACPI/PPTT: Add function to return ACPI 6.3 Identical tokens ed2b664fcc807 ACPI/PPTT: Modify node flag detection to find last IDENTICAL
[Regression Risk]
[Impact]
perf support for the ARMv8.2 Statistical Profiling Extension does not work on ACPI platforms.
[Test Case] ts_enable= 1,pa_enable= 1/ dd if=/dev/zero of=/dev/null count=10000 AUXTRACE size: 0x155fd0 offset: 0 ref: 0x226974
ubuntu@d06-2:~$ sudo perf record -e arm_spe/
10000+0 records in
10000+0 records out
5120000 bytes (5.1 MB, 4.9 MiB) copied, 0.0201586 s, 254 MB/s
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.354 MB perf.data ]
ubuntu@d06-2:~$ sudo perf report --dump-raw-trace
[...]
0 0 0x4a90 [0x30]: PERF_RECORD_
.
. ... ARM SPE data: size 1400784 bytes
. 00000000: b0 28 31 25 10 00 00 ff c0 PC 0xff00001025312
. 00000009: 99 07 00 LAT 7 ISSUE
. 0000000c: 98 09 00 LAT 9 TOT
. 0000000f: 52 16 00 EV RETIRED L1D-ACC
[...]
[Fix]
d482e575fbf0f perf: arm_spe: Enable ACPI/Platform automatic module loading
d24a0c7099b32 arm_pmu: acpi: spe: Add initial MADT/SPE probing
56855a99f3d0d ACPI/PPTT: Add function to return ACPI 6.3 Identical tokens
ed2b664fcc807 ACPI/PPTT: Modify node flag detection to find last IDENTICAL
[Regression Risk]
[Regression Risk]