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From: Stewart Smith <stewart@linux.vnet.ibm.com>
To: Andrew Donnellan <andrew.donnellan@au1.ibm.com>,
 linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH RFC] powerpc/powernv: sysfs entry to force full IPL reboot
In-Reply-To: <20161122092258.32514-1-andrew.donnellan@au1.ibm.com>
References: <20161122092258.32514-1-andrew.donnellan@au1.ibm.com>
Date: Fri, 23 Dec 2016 15:20:42 +1100
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Andrew Donnellan <andrew.donnellan@au1.ibm.com> writes:
> skiboot now supports "fast reboot", a reboot procedure where skiboot
> reinitialises hardware and loads a new kernel without re-IPLing the
> machine. At present, fast reboot support is still experimental and is not
> enabled by default, however it is intended that it will be enabled by
> default in a near-future release.
>
> There may be some circumstances where the user wants to force a full IPL
> reboot rather than using fast reboot. Add support for the
> OPAL_REBOOT_FULL_IPL reboot type, enabled by writing 1 to
> /sys/firmware/opal/force_full_ipl_reboot. On versions of skiboot that
> implement the OPAL_REBOOT_FULL_IPL reboot type, this will force an IPL. On
> versions that do not, print an error message on reboot and proceed with a
> regular reboot (which could be a full IPL or a fast reboot).
>
> Cc: Stewart Smith <stewart@linux.vnet.ibm.com>
> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
>
> ---
>
> Corresponding skiboot patch: http://patchwork.ozlabs.org/patch/697601/

FWIW I've just merged the skiboot patch.

-- 
Stewart Smith
OPAL Architect, IBM.