perf cs-etm: Respect timestamp option

When users pass the option '--timestamp' or '-T' in the record command,
all events will set the PERF_SAMPLE_TIME bit in the attribution.  In
this case, the AUX event will record the kernel timestamp, but it
doesn't mean Arm CoreSight enables timestamp packets in its hardware
tracing.

If the option '--timestamp' or '-T' is set, this patch always enables
Arm CoreSight timestamp, as a result, the bit 28 in event's config is to
be set.

Before:

  # perf record -e cs_etm// --per-thread --timestamp -- ls
  # perf script --header-only
  ...
  # event : name = cs_etm//, , id = { 69 }, type = 12, size = 136,
  config = 0, { sample_period, sample_freq } = 1,
  sample_type = IP|TID|TIME|CPU|IDENTIFIER, read_format = ID|LOST,
  disabled = 1, enable_on_exec = 1, sample_id_all = 1, exclude_guest = 1
  ...

After:

  # perf record -e cs_etm// --per-thread --timestamp -- ls
  # perf script --header-only
  ...
  # event : name = cs_etm//, , id = { 49 }, type = 12, size = 136,
  config = 0x10000000, { sample_period, sample_freq } = 1,
  sample_type = IP|TID|TIME|CPU|IDENTIFIER, read_format = ID|LOST,
  disabled = 1, enable_on_exec = 1, sample_id_all = 1, exclude_guest = 1
  ...

Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: James Clark <[email protected]>
Acked-by: Suzuki K Poulose <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Mike Leach <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: John Garry <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Namhyung Kim <[email protected]>

0 files changed, 0 insertions, 0 deletions