cpufreq: intel_pstate: Lower frequency than expected under no_turbo

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When turbo is not disabled by BIOS, but user disabled from intel P-State
sysfs and changes max/min using cpufreq sysfs, the resultant frequency
is lower than what user requested.

The reason for this, when the perf limits are calculated in set_policy()
callback, they are with reference to max cpu frequency (turbo frequency
), but when enforced in the intel_pstate_get_min_max() they are with
reference to max available performance as documented in the intel_pstate
documentation (in this case max non turbo P-State).

This needs similar change as done in intel_cpufreq_verify_policy() for
passive mode. Set policy->cpuinfo.max_freq based on the turbo status.

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

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Srinivas Pandruvada 2017-01-18 10:48:23 -08:00 • committed by Rafael J. Wysocki

parent fb1fe1041c

commit 7d9a8a9f4e

1 changed files with 14 additions and 0 deletions

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drivers/cpufreq/intel_pstate.c

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