Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752749AbaBQQ2L (ORCPT ); Mon, 17 Feb 2014 11:28:11 -0500 Received: from cantor2.suse.de ([195.135.220.15]:44086 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750830AbaBQQ2J (ORCPT ); Mon, 17 Feb 2014 11:28:09 -0500 From: Thomas Renninger To: Thomas Gleixner Cc: "H. Peter Anvin" , Conrad Kostecki , "linux-kernel@vger.kernel.org" , "x86@kernel.org" , "mingo@redhat.com" , "Rafael J. Wysocki" Subject: Re: AW: AW: [PATCH] x86: HPET force enable for Soekris net6501 Date: Mon, 17 Feb 2014 17:28:05 +0100 Message-ID: <3121313.GKMnFpiL5h@skinner> User-Agent: KMail/4.11.4 (Linux/3.11.6-4-desktop; KDE/4.11.4; x86_64; ; ) In-Reply-To: References: <4729ad4b8d3342c1b0e29fefe4b04d6a@DB4PR04MB265.eurprd04.prod.outlook.com> <52FE7738.6040009@zytor.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Friday, February 14, 2014 10:16:41 PM Thomas Gleixner wrote: > On Fri, 14 Feb 2014, H. Peter Anvin wrote: > > On 02/14/2014 11:59 AM, Thomas Gleixner wrote: > > > On Fri, 14 Feb 2014, H. Peter Anvin wrote: > > >> On 02/14/2014 11:15 AM, Thomas Gleixner wrote: > > >>> I'm fine with ACPI tables if we can provide simple means for embedded > > >>> users to load one via grub or just attach it to the kernel image. > > >> > > >> That already exists, see Documentation/acpi/initrd_table_override.txt. > > > > > > That requires, that you have already ACPI tables. > > > > > > ACPI_SIG_RSDP cannot be overridden and that's the base table you need > > > to get ACPI going in the first place. So we need support for that and > > > probably for storing the tables at some non canonical place. > > > > 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. What exactly do you try to achieve? I cannot imagine a use-case where RSDP and XSDT overriding would help you. Have you tried the current mechanism to override tables? What is missing and for what do you need it for? I need more context, maybe I can help then. Thomas -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/