diff options
| author | Kan Liang <kan.liang@linux.intel.com> | 2018-02-12 14:20:32 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-03-09 08:22:20 +0100 |
| commit | bcfbe5c41d630ce6b74da45134cea484248b515a (patch) | |
| tree | 6dafa39fc7eb4cacbeed31c2ebf4e52f2626e320 | |
| parent | d31fc13fdcb20e1c317f9a7dd6273c18fbd58308 (diff) | |
perf/x86: Introduce a ->read() callback in 'struct x86_pmu'
Auto-reload needs to be specially handled when reading event counts.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: acme@kernel.org
Link: http://lkml.kernel.org/r/1518474035-21006-3-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | arch/x86/events/core.c | 2 | ||||
| -rw-r--r-- | arch/x86/events/perf_event.h | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index 5a3ccd1715e2..00a6251981d2 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -1881,6 +1881,8 @@ early_initcall(init_hw_perf_events); static inline void x86_pmu_read(struct perf_event *event) { + if (x86_pmu.read) + return x86_pmu.read(event); x86_perf_event_update(event); } diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index 6495ffd57e3e..d445f0026989 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -520,6 +520,7 @@ struct x86_pmu { void (*disable)(struct perf_event *); void (*add)(struct perf_event *); void (*del)(struct perf_event *); + void (*read)(struct perf_event *event); int (*hw_config)(struct perf_event *event); int (*schedule_events)(struct cpu_hw_events *cpuc, int n, int *assign); unsigned eventsel; |