From mboxrd@z Thu Jan 1 00:00:00 1970 From: ykzhao Subject: Re: [Openipmi-developer] IPMI device discovery [was Re: [PATCH ] IPMI: Locate the IPMI system interface in ACPI namespace] Date: Thu, 19 Nov 2009 19:01:48 +0800 Message-ID: <1258628508.2933.28.camel@localhost.localdomain> References: <1258363089-26881-1-git-send-email-yakui.zhao@intel.com> <200911180945.45570.bjorn.helgaas@hp.com> <4B045BD9.8070906@hp.com> <200911181419.27238.bjorn.helgaas@hp.com> <4B046CE2.90200@hp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mga11.intel.com ([192.55.52.93]:57343 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753962AbZKTCUm (ORCPT ); Thu, 19 Nov 2009 21:20:42 -0500 In-Reply-To: <4B046CE2.90200@hp.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Rocky Craig Cc: Bjorn Helgaas , "minyard@acm.org" , "linux-acpi@vger.kernel.org" , Myron Stowe , "openipmi-developer@lists.sourceforge.net" , "lenb@kernel.org" On Thu, 2009-11-19 at 05:53 +0800, Rocky Craig wrote: > Bjorn Helgaas emitted: >=20 > > I disagree that this requirement was lost.... >=20 > Sorry, my words did not convey my intended meaning, which was that > "conformance" or "coherence" was lost, with SPMI also being listed > in ACPI general namespace. >=20 > You actually stated this with greater clarity: >=20 > > There may be firmware that has an SPMI but neglects to put the devi= ce > > in the namespace. >=20 > That may be the case on some legacy servers. Yes. In the IPMI 1.5 spec there is no definition of IPMI detection abou= t SPMI. The SPMI is added in IPMI 2.0 spec, which is used to detect the IPMI system interface. Maybe this mechanism is already used on some legacy servers.=20 =EF=BB=BFMaybe there exist both SPMI and IPMI system interface defined = in ACPI namespace. But they are the different BMC controllers.=20 In such case we had better not remove the detection of IPMI detection b= y using SPMI.=20 We can check whether they are the identical device in course of registering IPMI system interface. Thanks. >=20 > Rocky -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html