From owner-freebsd-current@FreeBSD.ORG  Fri Feb 14 17:51:38 2014
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id CBBE5124;
 Fri, 14 Feb 2014 17:51:38 +0000 (UTC)
Received: from bigwig.baldwin.cx (bigwig.baldwin.cx [IPv6:2001:470:1f11:75::1])
 (using TLSv1 with cipher ADH-CAMELLIA256-SHA (256/256 bits))
 (No client certificate requested)
 by mx1.freebsd.org (Postfix) with ESMTPS id 9D63E1458;
 Fri, 14 Feb 2014 17:51:38 +0000 (UTC)
Received: from jhbbsd.localnet (unknown [209.249.190.124])
 by bigwig.baldwin.cx (Postfix) with ESMTPSA id 6C199B9E6;
 Fri, 14 Feb 2014 12:51:37 -0500 (EST)
From: John Baldwin <jhb@freebsd.org>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [Xen-devel] [PATCH RFC 09/13] xen: change quality of the MADT
 ACPI enumerator
Date: Fri, 14 Feb 2014 12:51:10 -0500
User-Agent: KMail/1.13.5 (FreeBSD/8.4-CBSD-20130906; KDE/4.5.5; amd64; ; )
References: <1387884062-41154-1-git-send-email-roger.pau@citrix.com>
 <1980951.95r2q2cca3@ralph.baldwin.cx> <52FD7624.90202@citrix.com>
In-Reply-To: <52FD7624.90202@citrix.com>
MIME-Version: 1.0
Content-Type: Text/Plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message-Id: <201402141251.10278.jhb@freebsd.org>
X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.7
 (bigwig.baldwin.cx); Fri, 14 Feb 2014 12:51:37 -0500 (EST)
Cc: julien.grall@citrix.com, freebsd-xen@freebsd.org,
 freebsd-current@freebsd.org, kib@freebsd.org, xen-devel@lists.xenproject.org,
 gibbs@freebsd.org, Roger Pau Monne <roger.pau@citrix.com>
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current/>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
 <mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 14 Feb 2014 17:51:38 -0000

On Thursday, February 13, 2014 8:49:24 pm Andrew Cooper wrote:
> On 08/02/2014 21:42, John Baldwin wrote:
> > On Tuesday, December 24, 2013 12:20:58 PM Roger Pau Monne wrote:
> >> Lower the quality of the MADT ACPI enumerator, so on Xen Dom0 we can
> >> force the usage of the Xen mptable enumerator even when ACPI is
> >> detected.
> > Hmm, so I think one question is why does the existing MADT parser
> > not work with the MADT table provided by Xen?  This may very well
> > be correct, but if it's only a small change to make the existing
> > MADT parser work with Xen's MADT table, that route might be
> > preferable.
> >
> 
> For dom0, the MADT seen is the system MADT, which does not bear any
> reality to dom0's topology.  For PV domU, no MADT will be found.  For
> HVM domU, the MADT seen ought to represent (virtual) reality.

Hmm, the other changes suggested that you do want to use the I/O APIC
entries and interrupt overrides from the system MADT for dom0?  Just
not the CPU entries.  Is that correct?

-- 
John Baldwin