From mboxrd@z Thu Jan  1 00:00:00 1970
From: Len Brown <len.brown@intel.com>
Subject: Re: [ACPI] [PATCH] disable SMM access to SpeedStep using ACPI-FADT
	pstate_cnt
Date: 16 Feb 2004 00:46:37 -0500
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References: <20040215105712.GB6105@dominikbrodowski.de>
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To: Bruno Ducrot <ducrot@poupinou.org>
Cc: ACPI Developers <acpi-devel@lists.sourceforge.net>, cpufreq@www.linux.org.uk
List-Id: linux-acpi@vger.kernel.org

On Sun, 2004-02-15 at 09:54, Bruno Ducrot wrote:
> On Sun, Feb 15, 2004 at 11:57:12AM +0100, Dominik Brodowski wrote:
> > Disable SMM access to SpeedStep

> I would prefer to name it 'take_ownership' or something like that.  I think
> this is the correct naming.

We write PSTATE_CNT to SMI_CMD register to "assume processor p-state
control responsibility".  We're actually just telling SMM that the OS is
taking over p-states.  This might disable SMM involvement, or may just
change how SMM is involved -- we can't know which.  So I guess you're
right, and we end up with something like this:

- acpi_processor_disable_smm
+ acpi_processor_notify_smm

thanks,
-Len