linux-kernel - Re: [PATCH 2/2] acpi_power_meter: hwmon driver for ACPI 4.0 power meters

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Message-ID: <20090803205812.GC14694@plum>
Date:	Mon, 3 Aug 2009 13:58:12 -0700
From:	"Darrick J. Wong" <djwong@...ibm.com>
To:	Len Brown <lenb@...nel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	lm-sensors <lm-sensors@...sensors.org>,
	linux-acpi <linux-acpi@...r.kernel.org>,
	Zhang Rui <rui.zhang@...el.com>
Subject: Re: [PATCH 2/2] acpi_power_meter: hwmon driver for ACPI 4.0 power
	meters

On Mon, Jul 27, 2009 at 09:25:54PM -0400, Len Brown wrote:
> Hi Darrick,
> On the system you are planning to run this on...
> Are the power meters in the processor, or elsewhere?
> 
> If they are the ones in the processor, I'd rather that
> Linux use a native model-specific driver to access those
> registers and not use ACPI.

They're not in the processor.  Right now we're simulating the meters in kvm
until we get real hardware, though it could be a mechanism to report per-VM
power use.

--D
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