From: David Gibson <david@gibson.dropbear.id.au>
To: Ingo Oeser <ioe-lkml@axxeo.de>
Cc: Andrew Morton <akpm@osdl.org>, Anton Blanchard <anton@samba.org>,
Paul Mackerras <paulus@samba.org>,
linuxppc64-dev@lists.linuxppc.org, linux-kernel@vger.kernel.org
Subject: Re: [PPC64] Allow emulation of mfpvr on ppc64 kernel
Date: Fri, 11 Mar 2005 11:11:20 +1100 [thread overview]
Message-ID: <20050311001120.GA6512@localhost.localdomain> (raw)
In-Reply-To: <200503102317.04027.ioe-lkml@axxeo.de>
On Thu, Mar 10, 2005 at 11:17:03PM +0100, Ingo Oeser wrote:
> David Gibson wrote:
> > Andrew, please apply.
> >
> > Allow userspace programs on ppc64 to use the (privileged) mfpvr
> > instruction to determine the processor type. At the moment it
> > emulates the instruction to provide the real PVR value, though it
> > could be made to lie in future if for some reason we wish to restrict
> > what CPU features userspace uses.
>
> Why not putting the required information into the AUX table
> when executing your ELF programs? I loved this feature in the
> ix86 arch.
Because this is easy and is the way we already do it on ppc32..?
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist. NOT _the_ _other_ _way_
| _around_!
http://www.ozlabs.org/people/dgibson
next prev parent reply other threads:[~2005-03-11 0:40 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-10 2:18 [PPC64] Allow emulation of mfpvr on ppc64 kernel David Gibson
2005-03-10 22:17 ` Ingo Oeser
2005-03-11 0:11 ` David Gibson [this message]
2005-03-11 2:34 ` Paul Mackerras
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