From: Len Brown <len.brown@intel.com>
To: Bruno Ducrot <ducrot@poupinou.org>
Cc: ACPI Developers <acpi-devel@lists.sourceforge.net>,
cpufreq@www.linux.org.uk
Subject: Re: [ACPI] [PATCH] disable SMM access to SpeedStep using ACPI-FADT pstate_cnt
Date: 16 Feb 2004 00:46:37 -0500 [thread overview]
Message-ID: <1076910396.2507.41.camel@dhcppc4> (raw)
In-Reply-To: <20040215145407.GK13262@poupinou.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
next prev parent reply other threads:[~2004-02-16 5:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-15 10:57 [PATCH] disable SMM access to SpeedStep using ACPI-FADT pstate_cnt Dominik Brodowski
2004-02-15 14:54 ` [ACPI] " Bruno Ducrot
2004-02-16 5:46 ` Len Brown [this message]
2004-03-15 14:15 ` Dominik Brodowski
2004-02-16 5:29 ` Len Brown
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