From: Scott Wood <scottwood@freescale.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH] powerpc: Fix xmon for systems without MSR[RI]
Date: Tue, 30 Aug 2011 13:08:43 -0500 [thread overview]
Message-ID: <4E5D272B.6000403@freescale.com> (raw)
In-Reply-To: <1314684670.2488.82.camel@pasglop>
On 08/30/2011 01:11 AM, Benjamin Herrenschmidt wrote:
> On Mon, 2011-08-08 at 16:25 -0500, Jimi Xenidis wrote:
>> From: David Gibson <dwg@au1.ibm.com>
>>
>> Based on patch by David Gibson <dwg@au1.ibm.com>
>>
>> xmon has a longstanding bug on systems which are SMP-capable but lack
>> the MSR[RI] bit. In these cases, xmon invoked by IPI on secondary
>> CPUs will not properly keep quiet, but will print stuff, thereby
>> garbling the primary xmon's output. This patch fixes it, by ignoring
>> the RI bit if the processor does not support it.
>>
>> There's already a version of this for 4xx upstream, which we'll need
>> to extend to other RI-lacking CPUs at some point. For now this adds
>> BookE processors to the mix.
>
> Don't freescale one have RI ?
e500mc does.
e500v2 doesn't -- if a machine check happens while MSR[ME]=0, it causes
a checkstop.
-Scott
next prev parent reply other threads:[~2011-08-30 18:09 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-08 21:25 [PATCH] powerpc: Fix xmon for systems without MSR[RI] Jimi Xenidis
2011-08-30 6:11 ` Benjamin Herrenschmidt
2011-08-30 18:08 ` Scott Wood [this message]
2011-08-31 21:08 ` Jimi Xenidis
2011-09-23 15:40 ` [PATCH v2] " Jimi Xenidis
2011-09-29 12:45 ` [PATCH] [PATCH v3] " Jimi Xenidis
[not found] ` <1316790104-10067-1-git-send-email-jimix@pobox.com>
2011-09-23 16:32 ` [PATCH v2] " Scott Wood
2011-09-23 17:54 ` Jimi Xenidis
2011-09-23 17:56 ` Scott Wood
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