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

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Date:	Mon, 17 Feb 2014 11:40:19 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Thomas Renninger <trenn@...e.de>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	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>, devel@...ica.org
Subject: Re: AW: AW: [PATCH] x86: HPET force enable for Soekris net6501

On 02/17/2014 11:25 AM, Thomas Renninger wrote:
> On Monday, February 17, 2014 10:47:50 AM H. Peter Anvin wrote:
>> On 02/17/2014 10:23 AM, Thomas Renninger wrote:
>>> Easiest I can think of instead of trying to modify RSDP or similar, is
>>> to still pass the tables via unzipped, glued cpio which the kernel
>>> can access early. The same way it is done for current ACPI table
>>> overriding
>>> and early microcode passing.
>>
>> We shouldn't *need* an RSDP and RSDT/XSDT, though, since all they are
>> are pointers to the actual tables.  Rather than hacking around it we
>> should probably just fix the fundamental problem.
> 
> That is what I described.
> If something similar what I wrote gets implemented, you can simply
> add ACPI tables to initrd as described here:
> Documentation/acpi/initrd_table_override.txt
> and if BIOS already provides them they get overridden, otherwise
> they get added.
> 

Right, that was the idea.  Thomas Gleixner said it didn't work.

	-hpa


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