From: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Date: Tue, 7 Apr 2009 01:51:29 +0000 (-0700)
Subject: x86 ACPI: Add support for Always Running APIC timer
X-Git-Tag: v2.6.30-rc2~113^2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=db954b5898dd3ef3ef93f4144158ea8f97deb058;p=pandora-kernel.git

x86 ACPI: Add support for Always Running APIC timer

Add support for Always Running APIC timer, CPUID_0x6_EAX_Bit2.
This bit means the APIC timer continues to run even when CPU is
in deep C-states.

The advantage is that we can use LAPIC timer on these CPUs
always, and there is no need for "slow to read and program"
external timers (HPET/PIT) and the timer broadcast logic
and related code in C-state entry and exit.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---

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