intel_pstate: Use LFM bus ratio as min ratio/P state
LFM (max efficiency ratio) is the max frequency at minimum voltage supported by the processor. Using LFM as the minimum P state increases performmance without affecting power. By not using P states below LFM we avoid using P states that are less power efficient. Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com> Cc: 3.13+ <stable@vger.kernel.org> # 3.13+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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@ -357,7 +357,7 @@ static int byt_get_min_pstate(void)
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{
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{
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u64 value;
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u64 value;
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rdmsrl(BYT_RATIOS, value);
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rdmsrl(BYT_RATIOS, value);
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return value & 0xFF;
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return (value >> 8) & 0xFF;
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}
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}
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static int byt_get_max_pstate(void)
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static int byt_get_max_pstate(void)
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