Commit 1ccf7a1c authored Oct 01, 2013 by Srinivas Pandruvada Committed by Rafael J. Wysocki Oct 01, 2013

intel_pstate: fix no_turbo



When sysfs for no_turbo is set, then also some p states in turbo regions
are observed. This patch will set IDA Engage bit when no_turbo is set to
explicitly disengage turbo.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent 43c638e3

drivers/cpufreq/intel_pstate.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -394,6 +394,9 @@ static void intel_pstate_set_pstate(struct cpudata *cpu, int pstate)
		trace_cpu_frequency(pstate * 100000, cpu->cpu);

		cpu->pstate.current_pstate = pstate;
		if (limits.no_turbo)
		wrmsrl(MSR_IA32_PERF_CTL, BIT(32) \| (pstate << 8));
		else
		wrmsrl(MSR_IA32_PERF_CTL, pstate << 8);

		}