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author | Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2015-10-14 16:12:01 -0700 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-10-15 01:53:18 +0200 |
commit | 37afb00032424d684a48d649fcfb8b5e4f17c409 (patch) | |
tree | 27e39c9822569de2b6a18e5cc38c2074ce34d69e /CREDITS | |
parent | 3bcc6fa971c06151d6bf90cb0dc80807f71b93f6 (diff) | |
download | blackbird-op-linux-37afb00032424d684a48d649fcfb8b5e4f17c409.tar.gz blackbird-op-linux-37afb00032424d684a48d649fcfb8b5e4f17c409.zip |
cpufreq: intel_pstate: Use ACPI perf configuration
Use ACPI _PSS to limit the Intel P State turbo, max and min ratios.
This driver uses acpi processor perf lib calls to register performance.
The following logic is used to adjust Intel P state driver limits:
- If there is no turbo entry in _PSS, then disable Intel P state turbo
and limit to non turbo max
- If the non turbo max ratio is more than _PSS max non turbo value, then
set the max non turbo ratio to _PSS non turbo max
- If the min ratio is less than _PSS min then change the min ratio
matching _PSS min
- Scale the _PSS turbo frequency to max turbo frequency based on control
value.
This feature can be disabled by using kernel parameters:
intel_pstate=no_acpi
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'CREDITS')
0 files changed, 0 insertions, 0 deletions