Commit 443d4beb authored by Hendrik Brueckner's avatar Hendrik Brueckner Committed by Martin Schwidefsky

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

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: default avatarHendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent fcc77f50
......@@ -125,8 +125,7 @@ struct hws_trailer_entry {
unsigned long long flags; /* 0 - 63: All indicators */
};
unsigned long long overflow; /* 64 - sample Overflow count */
unsigned long long timestamp; /* 16 - time-stamp */
unsigned long long timestamp1; /* */
unsigned char timestamp[16]; /* 16 - 31 timestamp */
unsigned long long reserved1; /* 32 -Reserved */
unsigned long long reserved2; /* */
unsigned long long progusage1; /* 48 - reserved for programming use */
......@@ -232,6 +231,17 @@ static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi,
#define SDB_TE_ALERT_REQ_MASK 0x4000000000000000UL
#define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL
/* Return TOD timestamp contained in an trailer entry */
static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te)
{
/* TOD in STCKE format */
if (te->t)
return *((unsigned long long *) &te->timestamp[1]);
/* TOD in STCK format */
return *((unsigned long long *) &te->timestamp[0]);
}
/* Return pointer to trailer entry of an sample data block */
static inline unsigned long *trailer_entry_ptr(unsigned long v)
{
......
......@@ -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
......
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