diff options
| author | Hendrik Brueckner <brueckner@linux.vnet.ibm.com> | 2013-12-12 17:38:50 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-12-16 14:37:58 +0100 |
| commit | 443d4beb823d4dccaaf964b59df9dd38b4d6aae7 (patch) | |
| tree | f11cddd99fb9c8dced567a2577c43a271d6a29ac /arch/s390 | |
| parent | fcc77f507333776eaa336ab4ff49c23422f53703 (diff) | |
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: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/cpu_mf.h | 14 | ||||
| -rw-r--r-- | arch/s390/kernel/perf_cpum_sf.c | 2 |
2 files changed, 13 insertions, 3 deletions
diff --git a/arch/s390/include/asm/cpu_mf.h b/arch/s390/include/asm/cpu_mf.h index b0b3059b8d6..09dc5facc0b 100644 --- a/arch/s390/include/asm/cpu_mf.h +++ b/arch/s390/include/asm/cpu_mf.h @@ -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) { diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c index 9202f285889..3ab7e67ee2e 100644 --- a/arch/s390/kernel/perf_cpum_sf.c +++ b/arch/s390/kernel/perf_cpum_sf.c @@ -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 |