linux-kernel - Re: [PATCH v2] powerpc 8xx: Loading kernels over 8Mbytes without CONFIG_PIN

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Message-ID: <1387234621.10013.408.camel@snotra.buserror.net>
Date:	Mon, 16 Dec 2013 16:57:01 -0600
From:	Scott Wood <scottwood@...escale.com>
To:	leroy christophe <christophe.leroy@....fr>
CC:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	<linux-kernel@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v2] powerpc 8xx: Loading kernels over 8Mbytes without
 CONFIG_PIN_TLB

On Wed, 2013-12-11 at 00:36 +0100, leroy christophe wrote:
> Le 11/12/2013 00:18, Scott Wood a écrit :
> > There wasn't previously an ifdef specifically around the setting of
> > SPRN_MD_CTR.  That's new.  There was an ifdef around the entire block,
> > which has gone away because you are now trying to map more than 8M
> > regardless of CONFIG_PIN_TLB, but that has nothing to do with whether
> > there should be an ifdef around SPRN_MD_CTR.
> >
> >
> Euh, ok, but then we have to fix it in the whole function, not only in 
> this block. Do you think it is worth doing it ?

Fix what in the whole function?  I was asking what harm there would be
if you just remove all the CONFIG_PIN_TLB ifdefs except around the
actual RSV4I setting -- do we really care what value goes in MD_CTR for
the non-pinned case, as long as it's different for each entry?

-Scott


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