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2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f 
 kernel/kernel/trace/trace.h
....@@ -136,6 +136,25 @@
136136 	unsigned long		ret_ip;
137137 };
138138 
139
+/*
140
+ * trace_flag_type is an enumeration that holds different
141
+ * states when a trace occurs. These are:
142
+ *  IRQS_OFF		- interrupts were disabled
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+ *  IRQS_NOSUPPORT	- arch does not support irqs_disabled_flags
144
+ *  NEED_RESCHED	- reschedule is requested
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+ *  HARDIRQ		- inside an interrupt handler
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+ *  SOFTIRQ		- inside a softirq handler
147
+ */
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+enum trace_flag_type {
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+	TRACE_FLAG_IRQS_OFF		= 0x01,
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+	TRACE_FLAG_IRQS_NOSUPPORT	= 0x02,
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+	TRACE_FLAG_NEED_RESCHED		= 0x04,
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+	TRACE_FLAG_HARDIRQ		= 0x08,
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+	TRACE_FLAG_SOFTIRQ		= 0x10,
154
+	TRACE_FLAG_PREEMPT_RESCHED	= 0x20,
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+	TRACE_FLAG_NMI			= 0x40,
156
+};
157
+
139158 #define TRACE_BUF_SIZE		1024
140159 
141160 struct trace_array;
....@@ -726,7 +745,8 @@
726745 trace_buffer_lock_reserve(struct trace_buffer *buffer,
727746 			  int type,
728747 			  unsigned long len,
729
-			  unsigned int trace_ctx);
748
+			  unsigned long flags,
749
+			  int pc);
730750 
731751 struct trace_entry *tracing_get_trace_entry(struct trace_array *tr,
732752 						struct trace_array_cpu *data);
....@@ -751,11 +771,11 @@
751771 void trace_function(struct trace_array *tr,
752772 		    unsigned long ip,
753773 		    unsigned long parent_ip,
754
-		    unsigned int trace_ctx);
774
+		    unsigned long flags, int pc);
755775 void trace_graph_function(struct trace_array *tr,
756776 		    unsigned long ip,
757777 		    unsigned long parent_ip,
758
-		    unsigned int trace_ctx);
778
+		    unsigned long flags, int pc);
759779 void trace_latency_header(struct seq_file *m);
760780 void trace_default_header(struct seq_file *m);
761781 void print_trace_header(struct seq_file *m, struct trace_iterator *iter);
....@@ -823,10 +843,11 @@
823843 #endif
824844 
825845 #ifdef CONFIG_STACKTRACE
826
-void __trace_stack(struct trace_array *tr, unsigned int trace_ctx, int skip);
846
+void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
847
+		   int pc);
827848 #else
828
-static inline void __trace_stack(struct trace_array *tr, unsigned int trace_ctx,
829
-				 int skip)
849
+static inline void __trace_stack(struct trace_array *tr, unsigned long flags,
850
+				 int skip, int pc)
830851 {
831852 }
832853 #endif /* CONFIG_STACKTRACE */
....@@ -966,10 +987,10 @@
966987 extern void graph_trace_close(struct trace_iterator *iter);
967988 extern int __trace_graph_entry(struct trace_array *tr,
968989 			       struct ftrace_graph_ent *trace,
969
-			       unsigned int trace_ctx);
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+			       unsigned long flags, int pc);
970991 extern void __trace_graph_return(struct trace_array *tr,
971992 				 struct ftrace_graph_ret *trace,
972
-				 unsigned int trace_ctx);
993
+				 unsigned long flags, int pc);
973994 
974995 #ifdef CONFIG_DYNAMIC_FTRACE
975996 extern struct ftrace_hash __rcu *ftrace_graph_hash;
....@@ -1432,15 +1453,15 @@
14321453 void trace_buffer_unlock_commit_regs(struct trace_array *tr,
14331454 				     struct trace_buffer *buffer,
14341455 				     struct ring_buffer_event *event,
1435
-				     unsigned int trcace_ctx,
1456
+				     unsigned long flags, int pc,
14361457 				     struct pt_regs *regs);
14371458 
14381459 static inline void trace_buffer_unlock_commit(struct trace_array *tr,
14391460 					      struct trace_buffer *buffer,
14401461 					      struct ring_buffer_event *event,
1441
-					      unsigned int trace_ctx)
1462
+					      unsigned long flags, int pc)
14421463 {
1443
-	trace_buffer_unlock_commit_regs(tr, buffer, event, trace_ctx, NULL);
1464
+	trace_buffer_unlock_commit_regs(tr, buffer, event, flags, pc, NULL);
14441465 }
14451466 
14461467 DECLARE_PER_CPU(struct ring_buffer_event *, trace_buffered_event);
....@@ -1513,7 +1534,8 @@
15131534  * @buffer: The ring buffer that the event is being written to
15141535  * @event: The event meta data in the ring buffer
15151536  * @entry: The event itself
1516
- * @trace_ctx: The tracing context flags.
1537
+ * @irq_flags: The state of the interrupts at the start of the event
1538
+ * @pc: The state of the preempt count at the start of the event.
15171539  *
15181540  * This is a helper function to handle triggers that require data
15191541  * from the event itself. It also tests the event against filters and
....@@ -1523,12 +1545,12 @@
15231545 event_trigger_unlock_commit(struct trace_event_file *file,
15241546 			    struct trace_buffer *buffer,
15251547 			    struct ring_buffer_event *event,
1526
-			    void *entry, unsigned int trace_ctx)
1548
+			    void *entry, unsigned long irq_flags, int pc)
15271549 {
15281550 	enum event_trigger_type tt = ETT_NONE;
15291551 
15301552 	if (!__event_trigger_test_discard(file, buffer, event, entry, &tt))
1531
-		trace_buffer_unlock_commit(file->tr, buffer, event, trace_ctx);
1553
+		trace_buffer_unlock_commit(file->tr, buffer, event, irq_flags, pc);
15321554 
15331555 	if (tt)
15341556 		event_triggers_post_call(file, tt);
....@@ -1540,7 +1562,8 @@
15401562  * @buffer: The ring buffer that the event is being written to
15411563  * @event: The event meta data in the ring buffer
15421564  * @entry: The event itself
1543
- * @trace_ctx: The tracing context flags.
1565
+ * @irq_flags: The state of the interrupts at the start of the event
1566
+ * @pc: The state of the preempt count at the start of the event.
15441567  *
15451568  * This is a helper function to handle triggers that require data
15461569  * from the event itself. It also tests the event against filters and
....@@ -1553,14 +1576,14 @@
15531576 event_trigger_unlock_commit_regs(struct trace_event_file *file,
15541577 				 struct trace_buffer *buffer,
15551578 				 struct ring_buffer_event *event,
1556
-				 void *entry, unsigned int trace_ctx,
1579
+				 void *entry, unsigned long irq_flags, int pc,
15571580 				 struct pt_regs *regs)
15581581 {
15591582 	enum event_trigger_type tt = ETT_NONE;
15601583 
15611584 	if (!__event_trigger_test_discard(file, buffer, event, entry, &tt))
15621585 		trace_buffer_unlock_commit_regs(file->tr, buffer, event,
1563
-						trace_ctx, regs);
1586
+						irq_flags, pc, regs);
15641587 
15651588 	if (tt)
15661589 		event_triggers_post_call(file, tt);