Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753329AbbEHUIH (ORCPT ); Fri, 8 May 2015 16:08:07 -0400 Received: from v094114.home.net.pl ([79.96.170.134]:58555 "HELO v094114.home.net.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S932079AbbEHUID convert rfc822-to-8bit (ORCPT ); Fri, 8 May 2015 16:08:03 -0400 From: "Rafael J. Wysocki" To: Sudeep Holla Cc: "hanjun.guo@linaro.org" , "linux-acpi@vger.kernel.org" , "linux-pm@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "ahs3@redhat.com" , Lorenzo Pieralisi Subject: Re: [PATCH RFC 1/5] ACPI / containers : add support for ACPI0010 processor container Date: Fri, 08 May 2015 22:33:08 +0200 Message-ID: <4776276.Jd7Q2QdcgM@vostro.rjw.lan> User-Agent: KMail/4.11.5 (Linux/4.0.0+; KDE/4.11.5; x86_64; ; ) In-Reply-To: <554CD711.3090903@arm.com> References: <1430922690-6966-1-git-send-email-sudeep.holla@arm.com> <2334052.J3vzukF2MM@vostro.rjw.lan> <554CD711.3090903@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1525 Lines: 39 On Friday, May 08, 2015 04:32:33 PM Sudeep Holla wrote: > > On 08/05/15 15:06, Rafael J. Wysocki wrote: > > On Friday, May 08, 2015 04:50:10 PM Hanjun Guo wrote: > >> Hi Sudeep, > >> > >> On 2015年05月06日 22:31, Sudeep Holla wrote: > >>> ACPI 6.0 adds support for optional processor container device which may > >>> contain child objects that are either processor devices or other processor > >>> containers. This allows representing hierarchical processor topologies. > >>> > >>> It is declared using the _HID of ACPI0010. It may also have _CID of > >>> PNP0A05, which represents a generic container device. > >> > >> Container device helps support hotplug of nodes, CPUs, and memory, > >> does this container device ACPI0010 used for the same purpose? > > > > That's correct and the patch isn't. > > > > Thanks Rafael for the clarification. > > Just curious if the firmware adds _CID of PNP0A05 to support OS that > don't parse processor containers, will the current code not create > containers using _CID ? Yes, it will, but you can prevent that from happening by adding a new scan handler just for ACPI0010 (that may just return 1 from its ->attach callback and do nothing else). -- I speak only for myself. Rafael J. Wysocki, 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/