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Groups > linux.kernel > #1223936
| From | Catalin Marinas <catalin.marinas@arm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v4 5/7] Watchdog: introduce ARM SBSA watchdog driver |
| Date | 2015-09-14 11:00 +0200 |
| Message-ID | <q8xMe-1gc-3@gated-at.bofh.it> (permalink) |
| References | (2 earlier) <pwLGz-6pG-19@gated-at.bofh.it> <pxlqG-AJ-31@gated-at.bofh.it> <pxlAm-Mh-11@gated-at.bofh.it> <pxm3o-1kW-9@gated-at.bofh.it> <q7iPg-744-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thu, Sep 10, 2015 at 06:45:17PM -0400, Jon Masters wrote: > On 06/03/2015 02:53 PM, Timur Tabi wrote: > > On 06/03/2015 01:25 PM, Guenter Roeck wrote: > >> In general the idea here would be to use a crashdump kernel, which, > >> when loaded, would reset the watchdog before it fires. This kernel > >> would then write a core dump to a specified location. > > > > What is the mechanism for resetting the watchdog? The only code that > > knows about the hardware registers is this driver. Does the crashdump > > kernel call the watchdog stop function? > > > >> If arm64 doesn't support a crashdump kernel, it might still be possible > >> to log the backtrace somewhere (eg in nvram using pstore if that is > >> supported via acpi or efi). > > Just to go back and explicitly answer this, arm64 does have support for > crashdump, using the standard kexec/kdump approach, exactly as on x86. Just a clarification - this is not (yet) supported in mainline, not even with DT. -- Catalin -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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Re: [PATCH v4 5/7] Watchdog: introduce ARM SBSA watchdog driver Jon Masters <jcm@redhat.com> - 2015-09-11 00:50 +0200
Re: [PATCH v4 5/7] Watchdog: introduce ARM SBSA watchdog driver Pratyush Anand <panand@redhat.com> - 2015-09-14 06:30 +0200
Re: [PATCH v4 5/7] Watchdog: introduce ARM SBSA watchdog driver Fu Wei <fu.wei@linaro.org> - 2015-09-14 17:30 +0200
Re: [PATCH v4 5/7] Watchdog: introduce ARM SBSA watchdog driver Catalin Marinas <catalin.marinas@arm.com> - 2015-09-14 11:00 +0200
Re: [PATCH v4 5/7] Watchdog: introduce ARM SBSA watchdog driver Fu Wei <fu.wei@linaro.org> - 2015-09-15 05:20 +0200
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