linux-kernel - Re: AW: AW: [PATCH] x86: HPET force enable for Soekris net6501

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Message-ID: <alpine.DEB.2.02.1402142220150.21991@ionos.tec.linutronix.de>
Date:	Fri, 14 Feb 2014 22:47:32 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	"H. Peter Anvin" <hpa@...or.com>
cc:	Conrad Kostecki <ck@...rad-kostecki.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Thomas Renninger <trenn@...e.de>
Subject: Re: AW: AW: [PATCH] x86: HPET force enable for Soekris net6501

On Fri, 14 Feb 2014, H. Peter Anvin wrote:

> On 02/14/2014 01:16 PM, Thomas Gleixner wrote:
> >>
> >> Well, the RSDP and RSDT/XSDT are nothing but pointers to other tables,
> >> so if explicitly overridden I'm not sure if one actually would need
> >> them.  That doesn't mean our current code will work without them, though.
> > 
> > I tried once to overload all of the tables, but failed miserably in
> > the ACPI dungeon. RSDP was the major pain point IIRC.
> > 
> 
> I suspect we need to handle the RSDP and RSDT/XSDT specially, since,
> again, they are really just pointers to where to find the other tables.
>  They are part of the discovery, not the data.

I'm aware of that and I tried to hack around it but failed miserably
due to lack of masochism. It was simpler to abuse the DT stuff to get
things done. :)

Thanks,

	tglx


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