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s390/cpum_sf: Add helper to read TOD from trailer entries

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The trailer entry contains a timestamp of the time when the sample-data-block
became full.  The timestamp specifies a TOD (time-of-day) value in either the
STCK or STCKE format.

Provide a helper function to return the TOD value depending on the setting of
time format indicator.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Hendrik Brueckner
2013-12-12 17:38:50 +01:00
committed by Martin Schwidefsky
parent fcc77f5073
commit 443d4beb82
2 changed files with 13 additions and 3 deletions
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arch/s390/kernel/perf_cpum_sf.c
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@@ -981,7 +981,7 @@ static void hw_perf_event_update(struct perf_event *event, int flush_all)
debug_sprintf_event(sfdbg, 6, "hw_perf_event_update: sdbt=%p "
"overflow=%llu timestamp=0x%llx\n",
sdbt, te->overflow,
(te->f) ? te->timestamp : 0ULL);
(te->f) ? trailer_timestamp(te) : 0ULL);
/* Collect all samples from a single sample-data-block and
* flag if an (perf) event overflow happened. If so, the PMU