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intel_idle: Disable Baytrail Core and Module C6 auto-demotion

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Power efficiency improves on Baytrail (Intel Atom Processor E3000)
when Linux disables C6 auto-demotion.

Based on work by Srinidhi Kasagar <srinidhi.kasagar@intel.com>.

Signed-off-by: Len Brown <len.brown@intel.com>
Cc: x86@kernel.org
This commit is contained in:
Len Brown
2014-07-31 15:21:24 -04:00
parent 19583ca584
commit 8c058d53f6
2 changed files with 10 additions and 0 deletions
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arch/x86/include/uapi/asm/msr-index.h
+3
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@@ -149,6 +149,9 @@
#define MSR_CORE_C1_RES 0x00000660
#define MSR_CC6_DEMOTION_POLICY_CONFIG 0x00000668
#define MSR_MC6_DEMOTION_POLICY_CONFIG 0x00000669
#define MSR_AMD64_MC0_MASK 0xc0010044
#define MSR_IA32_MCx_CTL(x) (MSR_IA32_MC0_CTL + 4*(x))