linux-kernel - Re: powerpc/nvram: Fix an incorrect partition merge

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Message-ID: <87bn3dlgfz.fsf@linux.vnet.ibm.com>
Date:	Tue, 07 Jun 2016 15:24:16 +1000
From:	Stewart Smith <stewart@...ux.vnet.ibm.com>
To:	xinhui <xinhui.pan@...ux.vnet.ibm.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Cc:	Andrzej Hajda <a.hajda@...sung.com>,
	Christophe Jaillet <christophe.jaillet@...adoo.fr>,
	Nathan Fontenot <nfont@...ux.vnet.ibm.com>,
	Hari Bathini <hbathini@...ux.vnet.ibm.com>,
	Paul Mackerras <paulus@...ba.org>, tglx@...utronix.de
Subject: Re: powerpc/nvram: Fix an incorrect partition merge

xinhui <xinhui.pan@...ux.vnet.ibm.com> writes:
>> Has it always been broken?
>>
>
> no. after nvram partition corruption hit, all nvram partitions will be
> erased and re-alloc after the second machine reboot.
> I don't know who does it but i guess it is the firmware. :)

It is. PAPR says we format NVRAM when it's corrupted. This is also true
for NVRAM for PowerNV (not just pseries guest).

-- 
Stewart Smith
OPAL Architect, IBM.