linux-kernel - Re: [PATCH] powerpc/fsl: Add support for pci(e) machine check exception on E500MC / E5500

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Date:	Tue, 30 Sep 2014 20:20:03 +0000
From:	Jojy Varghese <jojyv@...iper.net>
To:	Scott Wood <scottwood@...escale.com>
CC:	Guenter Roeck <linux@...ck-us.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	"Michael Ellerman" <mpe@...erman.id.au>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Guenter Roeck <groeck@...iper.net>,
	"hongtao.jia@...escale.com" <hongtao.jia@...escale.com>
Subject: Re: [PATCH] powerpc/fsl: Add support for pci(e) machine check
 exception on E500MC / E5500



On 9/30/14 1:17 PM, "Scott Wood" <scottwood@...escale.com> wrote:

>On Tue, 2014-09-30 at 20:15 +0000, Jojy Varghese wrote:
>> 
>> On 9/30/14 8:50 AM, "Guenter Roeck" <linux@...ck-us.net> wrote:
>> 
>> >On Mon, Sep 29, 2014 at 06:31:06PM -0500, Scott Wood wrote:
>> >> Which specific chip and revision did you see this on?  What is the
>>value
>> >> in MCSR?
>> >> 
>> >Jojy can answer that, at least for P5020. We have seen it on P5040 as
>> >well,
>> >though, so it is not just limited to one chip/revision.
>> 
>> The specifics are:
>> PVR: 0x80240012
>> Instruction that causes the MC exception: lwbrx
>> 	The faulty load address is also present in RB. So we could change the
>> logic to use that
>> instead of DEAR. What I don¹t know is of there are other cases also
>>which
>> escapes the current logic.
>
>Could you find out what MCSR was when that happened?  I'm most
>interested in whether MAV was set, but the other bits would be
>interesting as well.

MCSR=a000 ( Load Error Report)
>
>-Scott
>
>
Thanks
Jojy

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