From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: [PATCH] Set cpu type explicitly, take 2
Date: Fri, 20 May 2005 17:45:14 +1000 [thread overview]
Message-ID: <1116575115.5153.115.camel@gaston> (raw)
In-Reply-To: <17037.32285.607543.859030@cargo.ozlabs.ibm.com>
On Fri, 2005-05-20 at 16:05 +1000, Paul Mackerras wrote:
> Here is a revised version of my patch to set the cpu type explicitly
> for gcc when compiling the kernel. Setting the cpu type is a good
> idea in any case, and particularly if you have a biarch gcc. This
> sets the type for all of the ppc cpu families we support.
>
> Any further comments? Are -mcpu=860 and -mcpu=8540 reasonable for 8xx
> and 85xx respectively? I used -mcpu=power4 rather than -mcpu=970
> because the former works with gcc-3.6.6 as in debian and the latter
> doesn't. Unfortunately -mcpu=440 doesn't work either in gcc 3.3,
> though it does in gcc 3.4 (as does -mcpu=970).
The problem is the same as ppc64 isn't it ?, -maltivec doesn't work with
-mcpu=power4 on gcc 3.4 does it ? That would mean no RAID6...
Ben.
next prev parent reply other threads:[~2005-05-20 7:46 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-20 6:05 [PATCH] Set cpu type explicitly, take 2 Paul Mackerras
2005-05-20 7:45 ` Benjamin Herrenschmidt [this message]
2005-05-20 14:30 ` Dan Malek
2005-05-20 22:27 ` Benjamin Herrenschmidt
2005-05-20 14:28 ` Dan Malek
2005-05-21 0:55 ` Paul Mackerras
2005-05-20 14:59 ` Kumar Gala
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