Add cpu hotplug support for perf counters

[lttng-modules.git] / ltt-events.h

diff --git a/ltt-events.h b/ltt-events.h
index b9bb3bb95d8bba919729afabd17f135a76fe9791..ec70eceadc69986627e2b02031a3b41324185c86 100644 (file)
--- a/ltt-events.h
+++ b/ltt-events.h
@@ -7,6 +7,8 @@
  * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
  * Holds LTTng per-session event registry.
+ *
+ * Dual LGPL v2.1/GPL v2 license.
  */
 
 #include <linux/list.h>
@@ -126,7 +128,8 @@ struct lttng_ctx_field {
        union {
                struct {
                        struct perf_event **e;  /* per-cpu array */
-                       struct list_head head;
+                       struct notifier_block nb;
+                       int hp_enable;
                        struct perf_event_attr *attr;
                } perf_counter;
        } u;
@@ -271,11 +274,17 @@ void ltt_event_put(const struct lttng_event_desc *desc);
 int ltt_probes_init(void);
 void ltt_probes_exit(void);
 struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx);
+void lttng_remove_context_field(struct lttng_ctx **ctx,
+                               struct lttng_ctx_field *field);
 void lttng_destroy_context(struct lttng_ctx *ctx);
 int lttng_add_pid_to_ctx(struct lttng_ctx **ctx);
 int lttng_add_comm_to_ctx(struct lttng_ctx **ctx);
 int lttng_add_prio_to_ctx(struct lttng_ctx **ctx);
 int lttng_add_nice_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_perf_counter_to_ctx(uint32_t type,
+                                 uint64_t config,
+                                 const char *name,
+                                 struct lttng_ctx **ctx);
 
 #ifdef CONFIG_KPROBES
 int lttng_kprobes_register(const char *name,