linux-kernel - Re: [PATCH 2/9] x86, RAS: Start reorganizing RAS features support

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Message-ID: <20111020151206.GI12080@aftab>
Date:	Thu, 20 Oct 2011 17:12:06 +0200
From:	Borislav Petkov <bp@...64.org>
To:	Mauro Carvalho Chehab <mchehab@...hat.com>
Cc:	"Luck, Tony" <tony.luck@...el.com>,
	EDAC devel <linux-edac@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>, X86-ML <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/9] x86, RAS: Start reorganizing RAS features support

On Wed, Oct 19, 2011 at 03:14:08PM -0400, Mauro Carvalho Chehab wrote:
> > I don't consider MCE decoding and injection drivers but rather MCA
> > functionality extensions or something, so those should go to arch/x86/
> > IMHO.
> 
> Agreed. MCE decoders and MCE error injection fit better together with
> MCA bits. I think they could just be moved to be into the same directory where 
> the MCE driver is located.

I think you mean arch/x86/kernel/cpu/mcheck/. Well, that _is_ possible,
since they're MCA extensions.

> > And the DRAM error decoding things, aka EDAC, should stay where they
> > are, although I cannot call them real drivers, either. We can't move
> > them yet anyway because they use the whole EDAC infrastructure.
> 
> True.
> 
> From someone that wants to select the RAS features however, it makes sense 
> to put everything together at the same menu when selecting the RAS options.
> 
> There are some tricks that could be used, like, for example, having something
> like:
> 
> menuconfig RAS_FEATURES
> 	bool "Enable RAS features"
> 
> if RAS_REATURES
> 
> config RAS_MCE
> 	bool "turn on Memory Channel Architecture Error logic for AMD CPU's"
> 	depends on X86
> 	select X86_MCE_AMD
> 
> config RAS_MCE
> 	bool "turn on Memory Channel Architecture Error logic for Intel CPU's"
> 	depends on X86
> 	select X86_MCE_INTEL
> 
> source "drivers/edac"
> 
> endif
> 
> at a /drivers/ras Kconfig (or at /ras)
> 
> This would allow putting everything together at the same Kconfig menu.

Ok, we could do that too, it has merits.

Let's discuss all this at KS.

Thanks.

-- 
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Boris.

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