From 443d4beb823d4dccaaf964b59df9dd38b4d6aae7 Mon Sep 17 00:00:00 2001 From: Hendrik Brueckner Date: Thu, 12 Dec 2013 17:38:50 +0100 Subject: [PATCH] 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 Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/cpu_mf.h | 14 ++++++++++++-- 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 b0b3059b8d64..09dc5facc0bc 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 9202f2858894..3ab7e67ee2e4 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 -- GitLab