perf jevents: Fix event syntax error caused by ExtSel

In the origin code, when "ExtSel" is 1, the eventcode will change to
"eventcode |= 1 << 21”. For event “UNC_Q_RxL_CREDITS_CONSUMED_VN0.DRS",
its "ExtSel" is "1", its eventcode will change from 0x1E to 0x20001E,
but in fact the eventcode should <=0x1FF, so this will cause the parse
fail:

  # perf stat -e "UNC_Q_RxL_CREDITS_CONSUMED_VN0.DRS" -a sleep 0.1
  event syntax error: '.._RxL_CREDITS_CONSUMED_VN0.DRS'
                                    \___ value too big for format, maximum is 511

On the perf kernel side, the kernel assumes the valid bits are continuous.
It will adjust the 0x100 (bit 8 for perf tool) to bit 21 in HW.

DEFINE_UNCORE_FORMAT_ATTR(event_ext, event, "config:0-7,21");

So the perf tool follows the kernel side and just set bit8 other than bit21.

Fixes: fedb2b518239cbc0 ("perf jevents: Add support for parsing uncore json files")
Reviewed-by: Kan Liang <[email protected]>
Signed-off-by: Xing Zhengjun <[email protected]>
Acked-by: Ian Rogers <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

0 files changed, 0 insertions, 0 deletions