linux-kernel - Re: [PATCH RESEND v10 02/11] reboot: Add hardware protection power-off

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]

Message-ID: <cb86a545-69d9-9fc0-6fa6-8ed2f786c5ae@linaro.org>
Date:   Fri, 18 Jun 2021 10:25:30 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
        Matti Vaittinen <mazziesaccount@...il.com>
Cc:     Mark Brown <broonie@...nel.org>, Kees Cook <keescook@...omium.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Zhang Rui <rui.zhang@...el.com>,
        Guenter Roeck <linux@...ck-us.net>,
        "agross@...nel.org" <agross@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        linux-power <linux-power@...rohmeurope.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>,
        "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
        "bjorn.andersson@...aro.org" <bjorn.andersson@...aro.org>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        Amit Kucheria <amitk@...nel.org>,
        Matteo Croce <mcroce@...rosoft.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Petr Mladek <pmladek@...e.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Mike Rapoport <rppt@...nel.org>,
        Josef Bacik <josef@...icpanda.com>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH RESEND v10 02/11] reboot: Add hardware protection
 power-off

On 03/06/2021 07:40, Matti Vaittinen wrote:
> There can be few cases when we need to shut-down the system in order to
> protect the hardware. Currently this is done at least by the thermal core
> when temperature raises over certain limit.
> 
> Some PMICs can also generate interrupts for example for over-current or
> over-voltage, voltage drops, short-circuit, ... etc. On some systems
> these are a sign of hardware failure and only thing to do is try to
> protect the rest of the hardware by shutting down the system.
> 
> Add shut-down logic which can be used by all subsystems instead of
> implementing the shutdown in each subsystem. The logic is stolen from
> thermal_core with difference of using atomic_t instead of a mutex in
> order to allow calls directly from IRQ context and changing the WARN()
> to pr_emerg() as discussed here:
> https://lore.kernel.org/lkml/YJuPwAZroVZ%2Fw633@alley/
> and here:
> https://lore.kernel.org/linux-iommu/20210331093104.383705-4-geert+renesas@glider.be/
> 
> Signed-off-by: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>

Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>


-- 
<http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog