From: Mohan Kumar M <mohan@in.ibm.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: ppcdev <linuxppc-dev@ozlabs.org>, Nathan Lynch <ntl@pobox.com>,
Paul Mackerras <paulus@samba.org>,
fastboot@lists.osdl.org
Subject: Re: [PATCH] Fix interrupt distribution in ppc970
Date: Wed, 7 Mar 2007 14:40:26 +0530 [thread overview]
Message-ID: <20070307091026.GJ7476@in.ibm.com> (raw)
In-Reply-To: <1173257567.9349.27.camel@localhost.localdomain>
On Wed, Mar 07, 2007 at 09:52:47AM +0100, Benjamin Herrenschmidt wrote:
> On Tue, 2007-03-06 at 16:05 -0600, Nathan Lynch wrote:
> > Was the root cause of this problem ever determined? It sure looked
> > like a firmware or hardware problem since it's known to occur only on
> > JS20.
>
> js20 and js21 have in common that the firmware "emulates" the XICS on
> top of an MPIC, which can cause interesting issues ... like the
> requirement of issuing EOI's from the CPU that got the interrupt, among
> ohters.
>
There is no interrupt missing problems in JS21. Only JS20 boxes face this
problem. The only difference between JS20 and JS21 is that JS20 does not
have Global Interrupt Queue while JS21 has GIQ.
Regards,
Mohan.
prev parent reply other threads:[~2007-03-07 9:10 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-08 4:55 [PATCH] Fix interrupt distribution in ppc970 Mohan Kumar M
2006-12-18 4:37 ` Paul Mackerras
2006-12-18 5:14 ` Mohan Kumar M
2006-12-18 10:57 ` Mohan Kumar M
2007-01-02 11:42 ` [Fastboot] " Mohan Kumar M
2007-01-02 15:07 ` Doug Maxey
2007-03-06 13:57 ` Mohan Kumar M
2007-03-06 14:16 ` Michael Ellerman
2007-03-06 16:55 ` Mohan Kumar M
2007-03-06 17:37 ` Michael Ellerman
2007-03-07 4:53 ` Mohan Kumar M
2007-03-07 10:52 ` Michael Ellerman
2007-04-09 8:57 ` Mohan Kumar M
2007-04-10 7:06 ` Michael Ellerman
2007-04-10 12:54 ` Mohan Kumar M
2007-04-10 16:59 ` Milton Miller
2007-04-11 1:16 ` Michael Ellerman
2007-04-19 11:52 ` Mohan Kumar M
2007-04-20 5:45 ` Milton Miller
2007-04-26 9:24 ` Mohan Kumar M
2007-04-26 14:42 ` Milton Miller
2007-05-03 14:47 ` Mohan Kumar M
2007-05-06 6:52 ` Milton Miller
2007-06-04 10:54 ` Mohan Kumar M
2007-06-06 9:43 ` Milton Miller
2007-06-06 11:31 ` Mohan Kumar M
2007-06-11 1:58 ` Milton Miller
2007-06-11 18:07 ` Mohan Kumar M
2007-06-12 14:51 ` Mohan Kumar M
2007-06-15 16:35 ` Milton Miller
2007-03-07 6:06 ` [Fastboot] " Vivek Goyal
2007-03-07 10:46 ` Michael Ellerman
2007-03-06 22:05 ` Nathan Lynch
2007-03-07 5:01 ` Mohan Kumar M
2007-03-07 8:52 ` Benjamin Herrenschmidt
2007-03-07 9:10 ` Mohan Kumar M [this message]
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