Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754474AbZFSXoe (ORCPT ); Fri, 19 Jun 2009 19:44:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752577AbZFSXoZ (ORCPT ); Fri, 19 Jun 2009 19:44:25 -0400 Received: from mga01.intel.com ([192.55.52.88]:25646 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752576AbZFSXoY convert rfc822-to-8bit (ORCPT ); Fri, 19 Jun 2009 19:44:24 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.42,256,1243839600"; d="scan'208";a="468013077" From: "Nakajima, Jun" To: Jeremy Fitzhardinge , "Eric W. Biederman" CC: Xen-devel , the arch/x86 maintainers , Linux Kernel Mailing List , Ingo Molnar , Keir Fraser , "H. Peter Anvin" , Thomas Gleixner , Len Brown Date: Fri, 19 Jun 2009 16:44:24 -0700 Subject: RE: [Xen-devel] Re: [PATCH RFC] x86/acpi: don't ignore I/O APICs just because there's no local APIC Thread-Topic: [Xen-devel] Re: [PATCH RFC] x86/acpi: don't ignore I/O APICs just because there's no local APIC Thread-Index: AcnxGFURHFiqpoaUQU+zperNWcAO4AAFye+w Message-ID: <0B53E02A2965CE4F9ADB38B34501A3A188656507@orsmsx505.amr.corp.intel.com> References: <4A329CF8.4050502@goop.org> <4A3A9220.4070807@goop.org> <4A3A99FB.7070807@goop.org> <4A3AC0C4.6060508@goop.org> <4A3BEDD6.6070303@goop.org> In-Reply-To: <4A3BEDD6.6070303@goop.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1014 Lines: 25 Jeremy Fitzhardinge wrote on Fri, 19 Jun 2009 at 12:58:14: >> >> Which if dom0 is to be redundant/restartable seems to make the >> argument for AML living in Xen. >> >> Xen has everything except the AML interpreter. >> > > I assume that putting AML into Xen has been considered, but I don't > anything about those deliberations. Keir? Jun? > Yes, it was one of the options years ago. We did not do that because Linux and Solaris (as dom0) already had the AML interpreter and it's overkill and redundant to have such a large component in the Xen hypervisor. Since the hypervisor does most of the power management (i.e. P, C, S-state, etc.) getting the info from dom0 today, we might want to reconsider the option. Jun ___ Intel Open Source Technology Center -- 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/