linux-kernel - Re: [Linux-stm32] [PATCH v2 1/1] drivers: watchdog: stm32_iwdg: set WDOG_HW

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 22 Nov 2019 11:28:47 +0100
From:   Ahmad Fatoum <a.fatoum@...gutronix.de>
To:     Christophe Roullier <christophe.roullier@...com>,
        wim@...ux-watchdog.org, linux@...ck-us.net,
        mcoquelin.stm32@...il.com, alexandre.torgue@...com
Cc:     linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-watchdog@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kernel@...gutronix.de
Subject: Re: [Linux-stm32] [PATCH v2 1/1] drivers: watchdog: stm32_iwdg: set
 WDOG_HW_RUNNING at probe

Hello Christophe,

On 11/22/19 9:24 AM, Christophe Roullier wrote:
> +	/*
> +	 * In case of CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED is set
> +	 * (Means U-Boot/bootloaders leaves the watchdog running)
> +	 * When we get here we should make a decision to prevent
> +	 * any side effects before user space daemon will take care of it.
> +	 * The best option, taking into consideration that there is no
> +	 * way to read values back from hardware, is to enforce watchdog
> +	 * being run with deterministic values.

What about the "ONF: Watchdog enable status bit" in the IWDG_SR register?

Cheers
Ahmad

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | https://www.pengutronix.de/ |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |