linux-kernel - Re: x86 BIOS interface for partitioning and system serial number on SGI UV

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Message-ID: <20080805163229.GA14870@sgi.com>
Date:	Tue, 5 Aug 2008 11:32:30 -0500
From:	Russ Anderson <rja@....com>
To:	Greg KH <greg@...ah.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>, mingo@...e.hu,
	tglx@...utronix.de, linux-kernel@...r.kernel.org,
	Jack Steiner <steiner@....com>
Subject: Re: x86 BIOS interface for partitioning and system serial number on SGI UV

On Mon, Aug 04, 2008 at 08:54:50PM -0700, Greg KH wrote:
> On Mon, Aug 04, 2008 at 05:59:42PM -0700, H. Peter Anvin wrote:
> > Russ Anderson wrote:
> >>> This really seems more that it should belong in sysfs -- 
> >>> /sys/class/firmware presumably.
> >> /proc/sgi_uv already exists, similar to /proc/sgi_sn on Itanium systems.
> >> Would it be /sys/class/firmware?  Reading Documentation/sysfs-rules.txt
> >> seems to indicate somewhere under /sys/devices, such as 
> >> /sys/devices/system/,
> >> but I may be wrong.
> >
> > /sys/class/firmware is usually where firmware-related things end up, but 
> > gregkh is the authority on sysfs organization.
> 
> /sys/class/firmware has a few users, but perhaps you are thinking of
> /sys/firmware instead?  That's probably the better place for something
> that is not using the firmware class itself.

Hi Greg,

If /sys/firmware is the right place, that is where I will put it.

Are the rules for /sys/firmware documented?  Documentation/sysfs-rules.txt
does not mention /sys/firmware.  It seems to indicate that /sys/class
should only contain symlinks:

  There are currently three places for classification of devices:
  /sys/block, /sys/class and /sys/bus. It is planned that these will
  not contain any device directories themselves, but only flat lists of
  symlinks pointing to the unified /sys/devices tree.

Thanks,
-- 
Russ Anderson, OS RAS/Partitioning Project Lead  
SGI - Silicon Graphics Inc          rja@....com
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