coresight: abort coresight tracing on kernel crash
Add trace events to control aborting CoreSight trace
dynamically based on module parameter.
Coresight driver will dump any trace present in the current sink
in case we hit a kernel panic, user fault or an undefined instruction.
Change-Id: I668c8cda285250a0b8dcccd2c1d2a8471977ce5c
Signed-off-by: Satyajit Desai <sadesai@codeaurora.org>
Signed-off-by: Rama Aparna Mallavarapu <aparnam@codeaurora.org>
diff --git a/kernel/panic.c b/kernel/panic.c
index dbec387..fcc8786 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -25,6 +25,8 @@
#include <linux/nmi.h>
#include <linux/console.h>
#include <linux/bug.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/exception.h>
#define PANIC_TIMER_STEP 100
#define PANIC_BLINK_SPD 18
@@ -136,6 +138,8 @@
int old_cpu, this_cpu;
bool _crash_kexec_post_notifiers = crash_kexec_post_notifiers;
+ trace_kernel_panic(0);
+
/*
* Disable local interrupts. This will prevent panic_smp_self_stop
* from deadlocking the first cpu that invokes the panic, since
@@ -260,6 +264,9 @@
mdelay(PANIC_TIMER_STEP);
}
}
+
+ trace_kernel_panic_late(0);
+
if (panic_timeout != 0) {
/*
* This will not be a clean reboot, with everything