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* [PATCH 1/3] perf/x86/intel: Move branch tracing setup to intel object
@ 2018-11-21 10:16 Jiri Olsa
  2018-11-21 10:16 ` [PATCH 2/3] perf/x86/intel: Add generic branch tracing check to intel_pmu_has_bts Jiri Olsa
                   ` (2 more replies)
  0 siblings, 3 replies; 6+ messages in thread
From: Jiri Olsa @ 2018-11-21 10:16 UTC (permalink / raw)
  To: Peter Zijlstra
  Cc: lkml, Ingo Molnar, Alexander Shishkin, Arnaldo Carvalho de Melo,
	Andi Kleen, Vince Weaver

Moving branch tracing setup to Intel core object into separate
intel_pmu_bts_config function, because it's Intel specific.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 arch/x86/events/core.c       | 20 ------------------
 arch/x86/events/intel/core.c | 41 +++++++++++++++++++++++++++++++++++-
 2 files changed, 40 insertions(+), 21 deletions(-)

diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 106911b603bd..374a19712e20 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -438,26 +438,6 @@ int x86_setup_perfctr(struct perf_event *event)
 	if (config == -1LL)
 		return -EINVAL;
 
-	/*
-	 * Branch tracing:
-	 */
-	if (attr->config == PERF_COUNT_HW_BRANCH_INSTRUCTIONS &&
-	    !attr->freq && hwc->sample_period == 1) {
-		/* BTS is not supported by this architecture. */
-		if (!x86_pmu.bts_active)
-			return -EOPNOTSUPP;
-
-		/* BTS is currently only allowed for user-mode. */
-		if (!attr->exclude_kernel)
-			return -EOPNOTSUPP;
-
-		/* disallow bts if conflicting events are present */
-		if (x86_add_exclusive(x86_lbr_exclusive_lbr))
-			return -EBUSY;
-
-		event->destroy = hw_perf_lbr_event_destroy;
-	}
-
 	hwc->config |= config;
 
 	return 0;
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 273c62e81546..8c1efb4d8f47 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -3098,10 +3098,49 @@ static unsigned long intel_pmu_large_pebs_flags(struct perf_event *event)
 	return flags;
 }
 
+static int intel_pmu_bts_config(struct perf_event *event)
+{
+	struct perf_event_attr *attr = &event->attr;
+	struct hw_perf_event *hwc = &event->hw;
+
+	if (attr->config == PERF_COUNT_HW_BRANCH_INSTRUCTIONS &&
+	    !attr->freq && hwc->sample_period == 1) {
+		/* BTS is not supported by this architecture. */
+		if (!x86_pmu.bts_active)
+			return -EOPNOTSUPP;
+
+		/* BTS is currently only allowed for user-mode. */
+		if (!attr->exclude_kernel)
+			return -EOPNOTSUPP;
+
+		/* disallow bts if conflicting events are present */
+		if (x86_add_exclusive(x86_lbr_exclusive_lbr))
+			return -EBUSY;
+
+		event->destroy = hw_perf_lbr_event_destroy;
+	}
+
+	return 0;
+}
+
+static int core_pmu_hw_config(struct perf_event *event)
+{
+	int ret = x86_pmu_hw_config(event);
+
+	if (ret)
+		return ret;
+
+	return intel_pmu_bts_config(event);
+}
+
 static int intel_pmu_hw_config(struct perf_event *event)
 {
 	int ret = x86_pmu_hw_config(event);
 
+	if (ret)
+		return ret;
+
+	ret = intel_pmu_bts_config(event);
 	if (ret)
 		return ret;
 
@@ -3596,7 +3635,7 @@ static __initconst const struct x86_pmu core_pmu = {
 	.enable_all		= core_pmu_enable_all,
 	.enable			= core_pmu_enable_event,
 	.disable		= x86_pmu_disable_event,
-	.hw_config		= x86_pmu_hw_config,
+	.hw_config		= core_pmu_hw_config,
 	.schedule_events	= x86_schedule_events,
 	.eventsel		= MSR_ARCH_PERFMON_EVENTSEL0,
 	.perfctr		= MSR_ARCH_PERFMON_PERFCTR0,
-- 
2.17.2


^ permalink raw reply related	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2018-11-22 10:15 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-11-21 10:16 [PATCH 1/3] perf/x86/intel: Move branch tracing setup to intel object Jiri Olsa
2018-11-21 10:16 ` [PATCH 2/3] perf/x86/intel: Add generic branch tracing check to intel_pmu_has_bts Jiri Olsa
2018-11-22 10:13   ` [tip:perf/urgent] perf/x86/intel: Add generic branch tracing check to intel_pmu_has_bts() tip-bot for Jiri Olsa
2018-11-21 10:16 ` [PATCH 3/3] perf/x86/intel: Disallow precise_ip on BTS event Jiri Olsa
2018-11-22 10:14   ` [tip:perf/urgent] perf/x86/intel: Disallow precise_ip on BTS events tip-bot for Jiri Olsa
2018-11-22 10:13 ` [tip:perf/urgent] perf/x86/intel: Move branch tracing setup to the Intel-specific source file tip-bot for Jiri Olsa

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