powerpc/cpumask: Update some comments

[safe/jmp/linux-2.6] / arch / powerpc / kernel / perf_event.c

diff --git a/arch/powerpc/kernel/perf_event.c b/arch/powerpc/kernel/perf_event.c
index bbcbae1..08460a2 100644 (file)
--- a/arch/powerpc/kernel/perf_event.c
+++ b/arch/powerpc/kernel/perf_event.c
@@ -116,20 +116,23 @@ static inline void perf_get_data_addr(struct pt_regs *regs, u64 *addrp)
 static inline u32 perf_get_misc_flags(struct pt_regs *regs)
 {
        unsigned long mmcra = regs->dsisr;
+       unsigned long sihv = MMCRA_SIHV;
+       unsigned long sipr = MMCRA_SIPR;
 
        if (TRAP(regs) != 0xf00)
                return 0;       /* not a PMU interrupt */
 
        if (ppmu->flags & PPMU_ALT_SIPR) {
-               if (mmcra & POWER6_MMCRA_SIHV)
-                       return PERF_RECORD_MISC_HYPERVISOR;
-               return (mmcra & POWER6_MMCRA_SIPR) ?
-                       PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL;
+               sihv = POWER6_MMCRA_SIHV;
+               sipr = POWER6_MMCRA_SIPR;
        }
-       if (mmcra & MMCRA_SIHV)
+
+       /* PR has priority over HV, so order below is important */
+       if (mmcra & sipr)
+               return PERF_RECORD_MISC_USER;
+       if ((mmcra & sihv) && (freeze_events_kernel != MMCR0_FCHV))
                return PERF_RECORD_MISC_HYPERVISOR;
-       return (mmcra & MMCRA_SIPR) ? PERF_RECORD_MISC_USER :
-               PERF_RECORD_MISC_KERNEL;
+       return PERF_RECORD_MISC_KERNEL;
 }
 
 /*
@@ -715,10 +718,10 @@ static int collect_events(struct perf_event *group, int max_count,
        return n;
 }
 
-static void event_sched_in(struct perf_event *event, int cpu)
+static void event_sched_in(struct perf_event *event)
 {
        event->state = PERF_EVENT_STATE_ACTIVE;
-       event->oncpu = cpu;
+       event->oncpu = smp_processor_id();
        event->tstamp_running += event->ctx->time - event->tstamp_stopped;
        if (is_software_event(event))
                event->pmu->enable(event);
@@ -732,7 +735,7 @@ static void event_sched_in(struct perf_event *event, int cpu)
  */
 int hw_perf_group_sched_in(struct perf_event *group_leader,
               struct perf_cpu_context *cpuctx,
-              struct perf_event_context *ctx, int cpu)
+              struct perf_event_context *ctx)
 {
        struct cpu_hw_events *cpuhw;
        long i, n, n0;
@@ -763,10 +766,10 @@ int hw_perf_group_sched_in(struct perf_event *group_leader,
                cpuhw->event[i]->hw.config = cpuhw->events[i];
        cpuctx->active_oncpu += n;
        n = 1;
-       event_sched_in(group_leader, cpu);
+       event_sched_in(group_leader);
        list_for_each_entry(sub, &group_leader->sibling_list, group_entry) {
                if (sub->state != PERF_EVENT_STATE_OFF) {
-                       event_sched_in(sub, cpu);
+                       event_sched_in(sub);
                        ++n;
                }
        }
@@ -1161,10 +1164,10 @@ static void record_and_restart(struct perf_event *event, unsigned long val,
         * Finally record data if requested.
         */
        if (record) {
-               struct perf_sample_data data = {
-                       .addr   = 0,
-                       .period = event->hw.last_period,
-               };
+               struct perf_sample_data data;
+
+               perf_sample_data_init(&data, ~0ULL);
+               data.period = event->hw.last_period;
 
                if (event->attr.sample_type & PERF_SAMPLE_ADDR)
                        perf_get_data_addr(regs, &data.addr);
@@ -1284,7 +1287,7 @@ static void perf_event_interrupt(struct pt_regs *regs)
                irq_exit();
 }
 
-void hw_perf_event_setup(int cpu)
+static void power_pmu_setup(int cpu)
 {
        struct cpu_hw_events *cpuhw = &per_cpu(cpu_hw_events, cpu);
 
@@ -1294,6 +1297,23 @@ void hw_perf_event_setup(int cpu)
        cpuhw->mmcr[0] = MMCR0_FC;
 }
 
+static int __cpuinit
+power_pmu_notifier(struct notifier_block *self, unsigned long action, void *hcpu)
+{
+       unsigned int cpu = (long)hcpu;
+
+       switch (action & ~CPU_TASKS_FROZEN) {
+       case CPU_UP_PREPARE:
+               power_pmu_setup(cpu);
+               break;
+
+       default:
+               break;
+       }
+
+       return NOTIFY_OK;
+}
+
 int register_power_pmu(struct power_pmu *pmu)
 {
        if (ppmu)
@@ -1311,5 +1331,7 @@ int register_power_pmu(struct power_pmu *pmu)
                freeze_events_kernel = MMCR0_FCHV;
 #endif /* CONFIG_PPC64 */
 
+       perf_cpu_notifier(power_pmu_notifier);
+
        return 0;
 }