perf counters: expand use of counter->event

Impact: change syscall, cleanup

Make use of the new perf_counters event type.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/kernel/cpu/perf_counter.c

@@ -56,9 +56,10 @@ const int max_intel_perfmon_events = ARRAY_SIZE(intel_perfmon_event_map);
 /*
  * Setup the hardware configuration for a given hw_event_type
  */
-int hw_perf_counter_init(struct perf_counter *counter, s32 hw_event_type)
+int hw_perf_counter_init(struct perf_counter *counter)
 {
 	struct hw_perf_counter *hwc = &counter->hw;
+	u32 hw_event_type = counter->event.hw_event_type;
 
 	if (unlikely(!perf_counters_initialized))
 		return -EINVAL;
@@ -83,7 +84,7 @@ int hw_perf_counter_init(struct perf_counter *counter, s32 hw_event_type)
 	hwc->config_base = MSR_ARCH_PERFMON_EVENTSEL0;
 	hwc->counter_base = MSR_ARCH_PERFMON_PERFCTR0;
 
-	hwc->irq_period = counter->__irq_period;
+	hwc->irq_period = counter->event.hw_event_period;
 	/*
 	 * Intel PMCs cannot be accessed sanely above 32 bit width,
 	 * so we install an artificial 1<<31 period regardless of
@@ -95,21 +96,19 @@ int hw_perf_counter_init(struct perf_counter *counter, s32 hw_event_type)
 	hwc->next_count = -((s32) hwc->irq_period);
 
 	/*
-	 * Negative event types mean raw encoded event+umask values:
+	 * Raw event type provide the config in the event structure
 	 */
-	if (hw_event_type < 0) {
-		counter->hw_event_type = -hw_event_type;
-		counter->hw_event_type &= ~PERF_COUNT_NMI;
+	hw_event_type &= ~PERF_COUNT_NMI;
+	if (hw_event_type == PERF_COUNT_RAW) {
+		hwc->config |= counter->event.hw_raw_ctrl;
 	} else {
-		hw_event_type &= ~PERF_COUNT_NMI;
 		if (hw_event_type >= max_intel_perfmon_events)
 			return -EINVAL;
 		/*
 		 * The generic map:
 		 */
-		counter->hw_event_type = intel_perfmon_event_map[hw_event_type];
+		hwc->config |= intel_perfmon_event_map[hw_event_type];
 	}
-	hwc->config |= counter->hw_event_type;
 	counter->wakeup_pending = 0;
 
 	return 0;
@@ -373,7 +372,7 @@ perf_handle_group(struct perf_counter *leader, u64 *status, u64 *overflown)
 				perf_save_and_restart(counter);
 			}
 		}
-		perf_store_irq_data(leader, counter->hw_event_type);
+		perf_store_irq_data(leader, counter->event.hw_event_type);
 		perf_store_irq_data(leader, atomic64_counter_read(counter));
 	}
 }
@@ -418,7 +417,8 @@ static void __smp_perf_counter_interrupt(struct pt_regs *regs, int nmi)
 			perf_store_irq_data(counter, instruction_pointer(regs));
 			break;
 		case PERF_RECORD_GROUP:
-			perf_store_irq_data(counter, counter->hw_event_type);
+			perf_store_irq_data(counter,
+					    counter->event.hw_event_type);
 			perf_store_irq_data(counter,
 					    atomic64_counter_read(counter));
 			perf_handle_group(counter, &status, &ack);

include/linux/perf_counter.h

@@ -96,8 +96,7 @@ struct perf_counter {
 #else
 	atomic_t			count32[2];
 #endif
-	u64				__irq_period;
-
+	struct perf_counter_event	event;
 	struct hw_perf_counter		hw;
 
 	struct perf_counter_context	*ctx;
@@ -111,7 +110,6 @@ struct perf_counter {
 	int				oncpu;
 	int				cpu;
 
-	s32				hw_event_type;
 	enum perf_record_type		record_type;
 
 	/* read() / irq related data */

kernel/perf_counter.c

@@ -37,7 +37,7 @@ static DEFINE_MUTEX(perf_resource_mutex);
  * Architecture provided APIs - weak aliases:
  */
 
-int __weak hw_perf_counter_init(struct perf_counter *counter, u32 hw_event_type)
+int __weak hw_perf_counter_init(struct perf_counter *counter)
 {
 	return -EINVAL;
 }
@@ -707,7 +707,7 @@ static const struct file_operations perf_fops = {
  * Allocate and initialize a counter structure
  */
 static struct perf_counter *
-perf_counter_alloc(u32 hw_event_period, int cpu, u32 record_type)
+perf_counter_alloc(struct perf_counter_event *event, int cpu, u32 record_type)
 {
 	struct perf_counter *counter = kzalloc(sizeof(*counter), GFP_KERNEL);
 
@@ -722,7 +722,7 @@ perf_counter_alloc(u32 hw_event_period, int cpu, u32 record_type)
 	counter->usrdata	= &counter->data[1];
 	counter->cpu		= cpu;
 	counter->record_type	= record_type;
-	counter->__irq_period	= hw_event_period;
+	counter->event		= *event;
 	counter->wakeup_pending = 0;
 
 	return counter;
@@ -750,11 +750,11 @@ sys_perf_counter_open(struct perf_counter_event __user *uevent, u32 record_type,
 		return PTR_ERR(ctx);
 
 	ret = -ENOMEM;
-	counter = perf_counter_alloc(event.hw_event_period, cpu, record_type);
+	counter = perf_counter_alloc(&event, cpu, record_type);
 	if (!counter)
 		goto err_put_context;
 
-	ret = hw_perf_counter_init(counter, event.hw_event_type);
+	ret = hw_perf_counter_init(counter);
 	if (ret)
 		goto err_free_put_context;