Support for IA32_ENERGY_PERF_BIAS MSR [LWN.net]

From:		venkatesh.pallipadi@intel.com
To:		Ingo Molnar <mingo@elte.hu>, H Peter Anvin <hpa@zytor.com>, Thomas Gleixner <tglx@linutronix.de>, Len Brown <lenb@kernel.org>, Dave Jones <davej@redhat.com>
Subject:		[patch 0/2] Support for IA32_ENERGY_PERF_BIAS MSR
Date:		Tue, 02 Mar 2010 16:06:49 -0800
Cc:		linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Archive-link:		Article, Thread

There is a new hardware feature, which lets system software to set
Energy Performance Preference. This is a opaque knob in the form of
IA32_ENERGY_PERF_BIAS MSR, which has a 4 bit Energy Performance
Preference Hint.

The support for this feature is indicated by CPUID.06H.ECX.bit3. Refer to
Intel Architectures Software Developer's Manual for more info.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>

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