Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758478AbZFLUfw (ORCPT ); Fri, 12 Jun 2009 16:35:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754926AbZFLUfn (ORCPT ); Fri, 12 Jun 2009 16:35:43 -0400 Received: from out01.mta.xmission.com ([166.70.13.231]:40891 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754331AbZFLUfm (ORCPT ); Fri, 12 Jun 2009 16:35:42 -0400 To: Jeremy Fitzhardinge Cc: Ingo Molnar , Thomas Gleixner , "H. Peter Anvin" , the arch/x86 maintainers , Linux Kernel Mailing List , Xen-devel References: <4A329CF8.4050502@goop.org> From: ebiederm@xmission.com (Eric W. Biederman) Date: Fri, 12 Jun 2009 13:35:35 -0700 In-Reply-To: <4A329CF8.4050502@goop.org> (Jeremy Fitzhardinge's message of "Fri\, 12 Jun 2009 11\:22\:48 -0700") 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: jeremy@goop.org, xen-devel@lists.xensource.com, linux-kernel@vger.kernel.org, x86@kernel.org, hpa@zytor.com, tglx@linutronix.de, mingo@redhat.com X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-DCC: XMission; sa04 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: ;Jeremy Fitzhardinge 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 * [sa04 1397; Body=1 Fuz1=1 Fuz2=1] * 0.5 XM_Body_Dirty_Words Contains a dirty word * 0.0 T_TooManySym_01 4+ unique symbols in subject * 0.0 XM_SPF_Neutral SPF-Neutral * 0.4 UNTRUSTED_Relay Comes from a non-trusted relay Subject: 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: 888 Lines: 23 Jeremy Fitzhardinge writes: > Parse the ACPI MADT for I/O APIC information, even if the cpu has no > (apparent) local APIC (ie, the CPU's APIC feature flag is clear). > > In principle, the local APIC and the I/O APIC are distinct (but related) > components, which can be independently present. > > In practice this can happen in a Xen system, where the hypervisor has > full control over the local APICs, and delivers interrupts initiated by > the I/O APICs via Xen's event channel mechanism. Xen is giving us a semi bogus acpi table? What is the paravirt configuration model with Xen? Is it documented somewhere? 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/