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watchdog: Induce non secure watchdog bite for lockup

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Induce non secure watchdog bite when ever kernel soft
lockup or hard lockups are detected. So that proper
context of cpus can be collected for debugging.

Change-Id: I613391d8d53fe52ce7934cdc910fb135c4e0fbf2
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
Signed-off-by: Channagoud Kadabi <ckadabi@codeaurora.org>
This commit is contained in:
Prasad Sodagudi 2017-03-01 15:03:05 -08:00 • committed by Gerrit - the friendly Code Review server
commit 309fb625f9
1 changed files with 12 additions and 2 deletions
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14
kernel/watchdog.c
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@ -27,6 +27,7 @@
#include <linux/kvm_para.h>
#include <linux/perf_event.h>
#include <linux/kthread.h>
#include <soc/qcom/watchdog.h>
/*
* The run state of the lockup detectors is controlled by the content of the
@ -364,8 +365,11 @@ static void watchdog_check_hardlockup_other_cpu(void)
if (per_cpu(hard_watchdog_warn, next_cpu) == true)
return;
if (hardlockup_panic)
panic("Watchdog detected hard LOCKUP on cpu %u", next_cpu);
if (hardlockup_panic) {
pr_err("Watchdog detected hard LOCKUP on cpu %u",
next_cpu);
msm_trigger_wdog_bite();
}
else
WARN(1, "Watchdog detected hard LOCKUP on cpu %u", next_cpu);
@ -427,6 +431,9 @@ static void watchdog_overflow_callback(struct perf_event *event,
return;
pr_emerg("Watchdog detected hard LOCKUP on cpu %d", this_cpu);
if (hardlockup_panic)
msm_trigger_wdog_bite();
print_modules();
print_irqtrace_events(current);
if (regs)
@ -549,6 +556,9 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
pr_emerg("BUG: soft lockup - CPU#%d stuck for %us! [%s:%d]\n",
smp_processor_id(), duration,
current->comm, task_pid_nr(current));
if (softlockup_panic)
msm_trigger_wdog_bite();
__this_cpu_write(softlockup_task_ptr_saved, current);
print_modules();
print_irqtrace_events(current);