From: Matt Sealey <matt@genesi-usa•com>
To: Timur Tabi <timur@freescale•com>
Cc: linuxppc-dev@ozlabs•org
Subject: Re: [PATCH] powerpc: remove default=y from PMAC and CHRP Kconfigs
Date: Thu, 09 Oct 2008 10:59:05 -0500 [thread overview]
Message-ID: <48EE2A49.10405@genesi-usa.com> (raw)
In-Reply-To: <48ED1B9E.3020907@freescale.com>
Timur Tabi wrote:
> Benjamin Herrenschmidt wrote:
>
>> I'm happy with -all- platforms for a given CPU type defaulting to y.
>
> I'm not sure I understand. The current Kconfigs defaults to Y for CHRP and PMAC
> on *all* PowerPC systems, including those that are neither CHRP nor PMAC. Are
> you saying that's a good thing?
Timur,
You do realise it's entirely possible to build a kernel which supports 50
different Freescale CPUs all in one?
Enabling CHRP, PMAC support *AND* non-CHRP platforms is possible in the same
binary. The relevant code that differentiates them is in the boot wrapper
and this is selected by *how you compile the kernel* and not which objects
are compiled in. make zImage and make cuImage on the same kernel objects
will give you an 'identical' image just packaged in a different way.
If you really want to build a single-cpu single-board kernel, disable CHRP
and PMAC for those board configs, but the default definitely should be to
enable them all within reason (obviously coherent and non-coherent designs
cannot coexist in the same kernel, 32-bit and 64-bit do not play well in
the same kernel..)
--
Matt Sealey <matt@genesi-usa•com>
Genesi, Manager, Developer Relations
next prev parent reply other threads:[~2008-10-09 15:59 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-08 19:57 [PATCH] powerpc: remove default=y from PMAC and CHRP Kconfigs Timur Tabi
2008-10-08 20:03 ` Benjamin Herrenschmidt
2008-10-08 20:14 ` Timur Tabi
2008-10-08 20:39 ` Benjamin Herrenschmidt
2008-10-08 20:44 ` Timur Tabi
2008-10-09 15:59 ` Matt Sealey [this message]
2008-10-09 16:20 ` Timur Tabi
2008-10-09 16:49 ` Matt Sealey
2008-10-09 17:08 ` Scott Wood
2008-10-09 17:23 ` Timur Tabi
2008-10-09 20:18 ` Sven Luther
2008-10-09 21:14 ` Timur Tabi
2008-10-09 21:28 ` Sven Luther
2008-10-09 21:32 ` Timur Tabi
2008-10-10 0:43 ` Paul Mackerras
2008-10-10 1:22 ` Kumar Gala
2008-10-10 1:51 ` Timur Tabi
2008-10-10 3:01 ` Benjamin Herrenschmidt
2008-10-10 3:01 ` Benjamin Herrenschmidt
2008-10-09 16:21 ` Scott Wood
2008-10-08 20:46 ` Scott Wood
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