trace: add STM trace hooks for printk, trace_printk, trace_function, stack trace and scheduler wakeup/context switch tracing

Change-Id: I6621cfceccc4f000e9196d2d8909f0493d5d4774
Signed-off-by: Philippe Langlais <philippe.langlais@linaro.org>
Signed-off-by: Robert Marklund <robert.marklund@stericsson.com>

4 files changed, 26 insertions, 0 deletions

diff --git a/kernel/printk.c b/kernel/printk.c
index 32690a0b7a1..a7156315d12 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -41,6 +41,7 @@
 #include <linux/cpu.h>
 #include <linux/notifier.h>
 #include <linux/rculist.h>
+#include <trace/stm.h>
 
 #include <asm/uaccess.h>
 
@@ -900,6 +901,9 @@ asmlinkage int vprintk(const char *fmt, va_list args)
 		}
 	}
 
+	/* Send printk buffer to MIPI STM trace hardware too if enable */
+	stm_dup_printk(printk_buf, printed_len);
+
 	/*
 	 * Copy the output into log_buf. If the caller didn't provide
 	 * the appropriate log prefix, we insert them here
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index a3f1bc5d2a0..8c27328a781 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -37,6 +37,7 @@
 #include <linux/init.h>
 #include <linux/poll.h>
 #include <linux/fs.h>
+#include <trace/stm.h>
 
 #include "trace.h"
 #include "trace_output.h"
@@ -1239,6 +1240,8 @@ trace_function(struct trace_array *tr,
 
 	if (!filter_check_discard(call, entry, buffer, event))
 		ring_buffer_unlock_commit(buffer, event);
+
+	stm_ftrace(ip, parent_ip);
 }
 
 void
@@ -1333,6 +1336,8 @@ static void __ftrace_trace_stack(struct ring_buffer *buffer,
 	if (!filter_check_discard(call, entry, buffer, event))
 		ring_buffer_unlock_commit(buffer, event);
 
+	stm_stack_trace(trace.entries);
+
  out:
 	/* Again, don't let gcc optimize things here */
 	barrier();
@@ -1503,6 +1508,8 @@ int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
 		ftrace_trace_stack(buffer, flags, 6, pc);
 	}
 
+	stm_trace_bprintk_buf(ip, fmt, trace_buf, sizeof(u32) * len);
+
 out_unlock:
 	arch_spin_unlock(&trace_buf_lock);
 	local_irq_restore(flags);
@@ -1579,6 +1586,8 @@ int trace_array_vprintk(struct trace_array *tr,
 		ftrace_trace_stack(buffer, irq_flags, 6, pc);
 	}
 
+	stm_trace_printk_buf(ip, trace_buf, len);
+
  out_unlock:
 	arch_spin_unlock(&trace_buf_lock);
 	raw_local_irq_restore(irq_flags);
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index c212a7f934e..773cb84adc8 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -19,6 +19,7 @@
 #include <linux/delay.h>
 
 #include <asm/setup.h>
+#include <trace/stm.h>
 
 #include "trace_output.h"
 
@@ -1703,6 +1704,8 @@ function_test_events_call(unsigned long ip, unsigned long parent_ip)
 
 	trace_nowake_buffer_unlock_commit(buffer, event, flags, pc);
 
+	stm_ftrace(ip, parent_ip);
+
  out:
 	atomic_dec(&per_cpu(ftrace_test_event_disable, cpu));
 	preempt_enable_notrace();
diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
index 7e62c0a1845..a136fd86533 100644
--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -11,6 +11,7 @@
 #include <linux/uaccess.h>
 #include <linux/ftrace.h>
 #include <trace/events/sched.h>
+#include <trace/stm.h>
 
 #include "trace.h"
 
@@ -47,6 +48,10 @@ tracing_sched_switch_trace(struct trace_array *tr,
 
 	if (!filter_check_discard(call, entry, buffer, event))
 		trace_buffer_unlock_commit(buffer, event, flags, pc);
+
+	stm_sched_switch(entry->prev_pid, entry->prev_prio, entry->prev_state,
+			entry->next_pid, entry->next_prio, entry->next_state,
+			entry->next_cpu);
 }
 
 static void
@@ -103,6 +108,11 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
 
 	if (!filter_check_discard(call, entry, buffer, event))
 		ring_buffer_unlock_commit(buffer, event);
+
+	stm_sched_wakeup(entry->prev_pid, entry->prev_prio, entry->prev_state,
+			entry->next_pid, entry->next_prio, entry->next_state,
+			entry->next_cpu);
+
 	ftrace_trace_stack(tr->buffer, flags, 6, pc);
 	ftrace_trace_userstack(tr->buffer, flags, pc);
 }