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Subject: Re: [PATCH] powerpc: Fix PowerPC 750CL CPU features
From: Josh Boyer <jwboyer@linux.vnet.ibm.com>
To: Milton Miller <miltonm@bga.com>
In-Reply-To: <89c4d64a1c2e654c8f339f008bbeddeb@bga.com>
References: <89c4d64a1c2e654c8f339f008bbeddeb@bga.com>
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Date: Thu, 12 Apr 2007 08:53:22 -0500
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Cc: ppcdev <linuxppc-dev@ozlabs.org>, Paul Mackerras <paulus@samba.org>
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On Thu, 2007-04-12 at 08:49 -0500, Milton Miller wrote:
> On Thu Apr 12 22:49:06 EST 2007, Josh Boyer wrote:
> > PowerPC 750CL has high BATs.  The patch below sets cpu_features to 
> > match that.
> > Without it, the original firmware mappings in the high BATs aren't 
> > cleared
> > which can cause "odd" address translations to occur.
> 
> Lets say what it does:  which continue to override the linux 
> translations.

Sure, that's exactly what it does since without the HIGH_BATS feature
Linux doesn't know about them and therefore can't clear them.

josh