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 devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
