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Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout panic support

From Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Newsgroups linux.kernel
Subject Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout panic support
Date 2016-02-05 14:40 +0100
Message-ID <qYOMb-P6-41@gated-at.bofh.it> (permalink)
References (11 earlier) <qYeIG-fd-3@gated-at.bofh.it> <qYkuJ-4bg-3@gated-at.bofh.it> <qYLlg-6Xi-11@gated-at.bofh.it> <qYOj7-ED-3@gated-at.bofh.it> <qYOj7-ED-1@gated-at.bofh.it>
Organization Free Electrons

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Hello,

On Fri, 5 Feb 2016 07:08:23 -0600, Timur Tabi wrote:

> > I'm quite certainly missing something completely obvious here, but how
> > can you get the WS1 interrupt*after*  raising a panic? Aren't all
> > interrupts disabled and the system fully halted once you get a panic(),
> > especially when raised from an interrupt handler? If that's the case,
> > how can the system continue to do things, such as receiving the WS1
> > interrupt and resetting ?
> 
> Typically, WS1 is not an interrupt.  Instead, it's a hard system-level 
> reset.

Ah, right, true. I missed that aspect because on my HW, triggering a
system-level reset on WS1 is optional. I can actually get an interrupt
on both WS0 and WS1, and no reset at all.

But a normal configuration indeed involves having the WS1 event
configured in HW to be a system-level reset.

So, OK, it makes sense. Thanks for the clarification!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Timur Tabi <timur@codeaurora.org> - 2016-02-03 18:30 +0100
  Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Fu Wei <fu.wei@linaro.org> - 2016-02-03 18:50 +0100
    Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Timur Tabi <timur@codeaurora.org> - 2016-02-03 19:00 +0100
      Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Fu Wei <fu.wei@linaro.org> - 2016-02-03 19:10 +0100
        Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Timur Tabi <timur@codeaurora.org> - 2016-02-03 19:10 +0100
          Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Fu Wei <fu.wei@linaro.org> - 2016-02-03 19:20 +0100
            Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Timur Tabi <timur@codeaurora.org> - 2016-02-03 19:30 +0100
              Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Fu Wei <fu.wei@linaro.org> - 2016-02-03 19:40 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Timur Tabi <timur@codeaurora.org> - 2016-02-03 19:50 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Fu Wei <fu.wei@linaro.org> - 2016-02-04 00:10 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Guenter Roeck <linux@roeck-us.net> - 2016-02-04 06:20 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Timur Tabi <timur@codeaurora.org> - 2016-02-04 14:50 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Guenter Roeck <linux@roeck-us.net> - 2016-02-04 15:50 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Fu Wei <fu.wei@linaro.org> - 2016-02-05 11:00 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Timur Tabi <timur@codeaurora.org> - 2016-02-05 14:10 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half  timeout panic support Thomas Petazzoni <thomas.petazzoni@free-electrons.com> - 2016-02-05 14:40 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half  timeout panic support Thomas Petazzoni <thomas.petazzoni@free-electrons.com> - 2016-02-05 14:10 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Guenter Roeck <linux@roeck-us.net> - 2016-02-05 15:50 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Fu Wei <fu.wei@linaro.org> - 2016-02-05 19:30 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Guenter Roeck <linux@roeck-us.net> - 2016-02-06 01:00 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Fu Wei <fu.wei@linaro.org> - 2016-02-06 19:10 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Timur Tabi <timur@codeaurora.org> - 2016-02-06 20:00 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Fu Wei <fu.wei@linaro.org> - 2016-02-07 03:10 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Guenter Roeck <linux@roeck-us.net> - 2016-02-06 20:00 +0100
                Re: [PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout  panic support Fu Wei <fu.wei@linaro.org> - 2016-02-07 03:20 +0100

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