linux-kernel - Re: [PATCH 1/2] x86, ioapic: Reserve only 128 bytes for IOAPICs

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Date:	Fri, 26 Aug 2011 13:39:18 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Ralf Jung <ralfjung-e@....de>, Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Yinghai Lu <yinghai@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] x86, ioapic: Reserve only 128 bytes for IOAPICs

On Fri, Aug 26, 2011 at 11:22:32AM +0200, Ralf Jung wrote:
> Hi,
> 
> > I rather wonder if there a way to assign a different address for the
> > watchdog Bjorn referring to. I don't have such machine to test but
> > seems its base address is configurable via pmio. Just curious.
>
> That would be the watchdog in my laptop then, I guess (I'm the reporter of the 
> bug mentioned by Bjorn)? I don't know much about all the inner workings, but 
> if you send me patches I can tell you what they do.
> 
> Kind regards,
> Ralf

Hi Ralf, I can't put that risk on you. Hell knows how it will react
on such reprogramming (which is seems rather a bios duty than kernel).

Bjorn, from where we pick this address at moment, it's obtained via
pci config?

	Cyrill
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