+
+#ifdef CONFIG_X86_PTRACE_BTS
+/* a branch trace record entry
+ *
+ * In order to unify the interface between various processor versions,
+ * we use the below data structure for all processors.
+ */
+enum bts_qualifier {
+ BTS_INVALID = 0,
+ BTS_BRANCH,
+ BTS_TASK_ARRIVES,
+ BTS_TASK_DEPARTS
+};
+
+struct bts_struct {
+ __u64 qualifier;
+ union {
+ /* BTS_BRANCH */
+ struct {
+ __u64 from_ip;
+ __u64 to_ip;
+ } lbr;
+ /* BTS_TASK_ARRIVES or
+ BTS_TASK_DEPARTS */
+ __u64 jiffies;
+ } variant;
+};
+#endif /* CONFIG_X86_PTRACE_BTS */
+