For SMP, Is platform specific secondary startup functionreally needed?

[John Linn]

> -----Original Message-----
> From: linux-arm-kernel-bounces at lists.infradead.org [mailto:linux-arm-
> kernel-bounces at lists.infradead.org] On Behalf Of Catalin Marinas
> Sent: Wednesday, April 06, 2011 8:39 AM
> To: John Linn
> Cc: linux at arm.linux.org.uk; linux-arm-kernel at lists.infradead.org
> Subject: Re: For SMP, Is platform specific secondary startup
> functionreally needed?
> 
> On Wed, 2011-04-06 at 14:48 +0100, John Linn wrote:
> > I'm doing some cleanup of SMP patches based on Russell and Catalin's
> > input which was real helpful. It seems to me that there is not
always
> a
> > need for a platform specific secondary startup.
> >
> > I have tested with just letting CPU1 go straight to
> secondary_startup()
> > in head.S and it works fine.
> >
> > I'm probably missing something obvious, if so can you share it?
> 
> We use the pen release mechanism serialise the secondary CPUs booting.

I'm not saying you can't have it, just that some platforms may not need
it.

Maybe I'm oversimplifying the boot process for our platform, but it
seems to 
be working fine.

-- John

> 
> --
> Catalin
> 
> 
> 
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