Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756865AbZFTIWO (ORCPT ); Sat, 20 Jun 2009 04:22:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756738AbZFTIVv (ORCPT ); Sat, 20 Jun 2009 04:21:51 -0400 Received: from out01.mta.xmission.com ([166.70.13.231]:42691 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756727AbZFTIVs (ORCPT ); Sat, 20 Jun 2009 04:21:48 -0400 To: Keir Fraser Cc: "Nakajima\, Jun" , Jeremy Fitzhardinge , Xen-devel , the arch/x86 maintainers , Linux Kernel Mailing List , Ingo Molnar , "H. Peter Anvin" , Thomas Gleixner , Len Brown References: From: ebiederm@xmission.com (Eric W. Biederman) Date: Sat, 20 Jun 2009 01:21:47 -0700 In-Reply-To: (Keir Fraser's message of "Sat\, 20 Jun 2009 08\:39\:55 +0100") Message-ID: User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-XM-SPF: eid=;;;mid=;;;hst=in02.mta.xmission.com;;;ip=76.21.114.89;;;frm=ebiederm@xmission.com;;;spf=neutral X-SA-Exim-Connect-IP: 76.21.114.89 X-SA-Exim-Rcpt-To: keir.fraser@eu.citrix.com, lenb@kernel.org, tglx@linutronix.de, hpa@zytor.com, mingo@redhat.com, linux-kernel@vger.kernel.org, x86@kernel.org, xen-devel@lists.xensource.com, jeremy@goop.org, jun.nakajima@intel.com X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-DCC: XMission; sa02 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: ;Keir Fraser X-Spam-Relay-Country: X-Spam-Report: * -1.8 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.0 T_TM2_M_HEADER_IN_MSG BODY: T_TM2_M_HEADER_IN_MSG * -2.6 BAYES_00 BODY: Bayesian spam probability is 0 to 1% * [score: 0.0000] * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa02 1397; Body=1 Fuz1=1 Fuz2=1] * 0.0 T_TooManySym_01 4+ unique symbols in subject * 0.0 XM_SPF_Neutral SPF-Neutral * 0.0 T_TooManySym_02 5+ unique symbols in subject * 0.4 UNTRUSTED_Relay Comes from a non-trusted relay Subject: Re: [Xen-devel] Re: [PATCH RFC] x86/acpi: don't ignore I/O APICs just because there's no local APIC X-SA-Exim-Version: 4.2.1 (built Thu, 25 Oct 2007 00:26:12 +0000) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1314 Lines: 30 Keir Fraser writes: > On 20/06/2009 00:44, "Nakajima, Jun" wrote: > >>> 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. > > Yes, we could reconsider. However is there any stuff that dom0 remains > responsible for (e.g., PCI management, and therefore PCI hotplug) where it > would continue to need to be OSPM, interpreting certain AML objects? In > general how safe would it be to have two layered entities both playing at > being OSPM? Short of running the oddball acpi based drivers. I'm not familiar with any acpi in the pci management. Eric -- 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/