diff options
| author | Paul Mackerras <paulus@samba.org> | 2009-06-11 14:55:42 +1000 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-11 16:48:37 +0200 |
| commit | 106b506c3a8b74daa5751e83ed3e46438fcf9a52 (patch) | |
| tree | ad141aa86b020501823c7e2c7ac0abb9f27cf5a1 /arch/powerpc/kernel/perf_counter.c | |
| parent | 4da52960fd1ae3ddd14901bc88b608cbeaa4b9a6 (diff) | |
perf_counter: powerpc: Implement generalized cache events for POWER processors
This adds tables of event codes for the generalized cache events for
all the currently supported powerpc processors: POWER{4,5,5+,6,7} and
PPC970*, plus powerpc-specific code to use these tables when a
generalized cache event is requested.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <18992.36430.933526.742969@drongo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/powerpc/kernel/perf_counter.c')
| -rw-r--r-- | arch/powerpc/kernel/perf_counter.c | 42 |
1 files changed, 40 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/perf_counter.c b/arch/powerpc/kernel/perf_counter.c index 5d12e68aac1c..bb202388170e 100644 --- a/arch/powerpc/kernel/perf_counter.c +++ b/arch/powerpc/kernel/perf_counter.c @@ -856,6 +856,36 @@ static void hw_perf_counter_destroy(struct perf_counter *counter) } } +/* + * Translate a generic cache event config to a raw event code. + */ +static int hw_perf_cache_event(u64 config, u64 *eventp) +{ + unsigned long type, op, result; + int ev; + + if (!ppmu->cache_events) + return -EINVAL; + + /* unpack config */ + type = config & 0xff; + op = (config >> 8) & 0xff; + result = (config >> 16) & 0xff; + + if (type >= PERF_COUNT_HW_CACHE_MAX || + op >= PERF_COUNT_HW_CACHE_OP_MAX || + result >= PERF_COUNT_HW_CACHE_RESULT_MAX) + return -EINVAL; + + ev = (*ppmu->cache_events)[type][op][result]; + if (ev == 0) + return -EOPNOTSUPP; + if (ev == -1) + return -EINVAL; + *eventp = ev; + return 0; +} + const struct pmu *hw_perf_counter_init(struct perf_counter *counter) { u64 ev; @@ -868,13 +898,21 @@ const struct pmu *hw_perf_counter_init(struct perf_counter *counter) if (!ppmu) return ERR_PTR(-ENXIO); - if (counter->attr.type != PERF_TYPE_RAW) { + switch (counter->attr.type) { + case PERF_TYPE_HARDWARE: ev = counter->attr.config; if (ev >= ppmu->n_generic || ppmu->generic_events[ev] == 0) return ERR_PTR(-EOPNOTSUPP); ev = ppmu->generic_events[ev]; - } else { + break; + case PERF_TYPE_HW_CACHE: + err = hw_perf_cache_event(counter->attr.config, &ev); + if (err) + return ERR_PTR(err); + break; + case PERF_TYPE_RAW: ev = counter->attr.config; + break; } counter->hw.config_base = ev; counter->hw.idx = 0; |