[PATCH RFC] powerpc/powernv: sysfs entry to force full IPL reboot

[Andrew Donnellan]

On 23/11/16 12:37, Andrew Donnellan wrote:
>> There's existing logic in kernel/reboot.c to handle a reboot= command
>> line parameter, which can set the reboot_mode, so my preference would be
>> that we use that.
>>
>> Currently we completely ignore the reboot_mode, so there's no backward
>> compatibility issue.
>>
>> It looks like the default is REBOOT_COLD, whatever that means. So I
>> think we could define that on powernv REBOOT_HARD means "do a full IPL".
>
> Sounds good.

Thinking about this more - you can't change that at runtime. :(

>
>> Or we could use "force", which already exists, though I can't quite see
>> what that actually means on x86.
>
> Hmm.

It looks like that on x86, if reboot_force = 1, we don't call 
machine_shutdown() and go straight to __machine_emergency_restart()?

-- 
Andrew Donnellan              OzLabs, ADL Canberra
andrew.donnellan at au1.ibm.com  IBM Australia Limited