RE: [Openipmi-developer] IPMI device discovery [was Re: [PATCH ] IPMI: Locate the IPMI system interface in ACPI namespace]

Bela Lubkin
2009-11-30T23:46:19Z

> Yes. In the IPMI 1.5 spec there is no definition of IPMI
> detection about SPMI.

It was added: <http://www.intel.com/design/servers/ipmi/IPMI1511E5.pdf>
defines IPMI detection via ACPI, SPMI etc.

>Bela<

> -----Original Message-----
> From: ykzhao [mailto:yakui.zhao@intel.com]
> Sent: Thursday, November 19, 2009 3:02 AM
> To: Rocky Craig
> Cc: minyard@acm.org; linux-acpi@vger.kernel.org; Myron Stowe;
> openipmi-developer@lists.sourceforge.net; Bjorn Helgaas;
> lenb@kernel.org
> Subject: Re: [Openipmi-developer] IPMI device discovery [was
> Re: [PATCH ] IPMI: Locate the IPMI system interface in ACPI namespace]
>
> On Thu, 2009-11-19 at 05:53 +0800, Rocky Craig wrote:
> > Bjorn Helgaas emitted:
> >
> > > I disagree that this requirement was lost....
> >
> > 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.
> >
> > You actually stated this with greater clarity:
> >
> > > There may be firmware that has an SPMI but neglects to
> put the device
> > > in the namespace.
>
> >
> > That may be the case on some legacy servers.
> Yes. In the IPMI 1.5 spec there is no definition of IPMI
> detection about
> 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.
>
> ﻿Maybe there exist both SPMI and IPMI system interface defined in ACPI
> namespace. But they are the different BMC controllers.
> In such case we had better not remove the detection of IPMI
> detection by
> using SPMI.
> We can check whether they are the identical device in course of
> registering IPMI system interface.
>
> Thanks.
>
>
> >
> > Rocky
>
>
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