Asymmetric platforms might have different max cpu frequency between small and big cores. Currently the intel_pstate driver uses package wide MSR register that can not distinguish max cpu frequency between small and big cores when turbo is disabled, which causes inconsistency compared to the scenario when turbo mode is enabled. This patch changes the logic from package wide MSR register to percpu HWP register so as to avoid this issue.
This path is based on Rafael's previous patchset to clean up the intel_pstate_get_hwp_max() https://patchwork.kernel.org/project/linux-pm/patch/2241039.bdjsIDbar3@kreacher/ Chen Yu (2): cpufreq: intel_pstate: Add parameter to get guarantee cpufreq: intel_pstate: Get percpu max freq via HWP MSR register if available drivers/cpufreq/intel_pstate.c | 29 ++++++++++++++++------------- 1 file changed, 16 insertions(+), 13 deletions(-) -- 2.17.1
