linux-kernel - Re: [PATCH v2 04/28] ARM: mm: cache-l2x0: Add support for re-enabling l2x0

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Message-ID: <1295979242.10109.308.camel@e102109-lin.cambridge.arm.com>
Date:	Tue, 25 Jan 2011 18:14:02 +0000
From:	Catalin Marinas <catalin.marinas@....com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Colin Cross <ccross@...roid.com>, linux-tegra@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, olof@...om.net,
	konkers@...roid.com, Santosh Shilimkar <santosh.shilimkar@...com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Tony Lindgren <tony@...mide.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 04/28] ARM: mm: cache-l2x0: Add support for
 re-enabling l2x0

On Tue, 2011-01-25 at 15:41 +0000, Russell King - ARM Linux wrote:
> I think we need to come up with some proper way to deal with cpuidle
> which doesn't involve adding lots of globally visible functions to all
> sorts of bits of code and having platforms call them individually,
> otherwise this is going to get _really_ messy in the future.
> 
> Maybe we need a notifier list which can be told when cpuidle events
> happen, so that parts of the system such as VFP and L2 cache support
> can do the right thing without having platforms add lots of stuff like
> 
>         gic_secondary_init();
>         gic_restore_interrupt_types();
>         vfp_enable();
>         l2x0_enable();
>         twd_enable();
>         ... etc ...
> 
> in their SoC specific code.

But do we need a strict order between such operations? The notifier call
chain isn't too flexible.

-- 
Catalin


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