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Commit 9b5a9738 authored by Prakruthi Deepak Heragu's avatar Prakruthi Deepak Heragu
Browse files

soc: qcom: Add forever loop after non-secure bite configuration 



The core which induces the non-secure bite should not
proceed further. Non-secure bite is a secure interrupt
and one of the core handles and that may not be the same
core which configured the watchdog. Add forever loop
after non-secure bit programming, so that core do not
proceed further.

Change-Id: I5523ad00d47755df6eed2bfb9210b585ee22f4ed
Signed-off-by: default avatarPrasad Sodagudi <psodagud@codeaurora.org>
Signed-off-by: default avatarPrakruthi Deepak Heragu <pheragu@codeaurora.org>
parent e8c9c4f0

drivers/soc/qcom/qcom_watchdog.c

+12 −2
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.

 * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.

 */



#include <linux/module.h>
@@ -491,6 +491,16 @@ void msm_trigger_wdog_bite(void) 
		__raw_readl(wdog_data->base + WDT0_EN),

		__raw_readl(wdog_data->base + WDT0_BARK_TIME),

		__raw_readl(wdog_data->base + WDT0_BITE_TIME));

	/*

	 * This function induces the non-secure bite and control

	 * should not return to the calling function. Non-secure

	 * bite interrupt is affined to all the cores and it may

	 * not be handled by the same cores which configured

	 * non-secure bite. So add forever loop here.

	 */

	while (1)

		udelay(1);



}

EXPORT_SYMBOL(msm_trigger_wdog_bite);
@@ -510,7 +520,7 @@ static irqreturn_t wdog_bark_handler(int irq, void *dev_id) 
	if (wdog_dd->do_ipi_ping)

		dump_cpu_alive_mask(wdog_dd);

	msm_trigger_wdog_bite();

	panic("Failed to cause a watchdog bite! - Falling back to kernel panic!");



	return IRQ_HANDLED;

}