diff options
Diffstat (limited to 'drivers/cpufreq/intel_pstate.c')
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index a394ff05aba6..482a5f241d1a 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -2823,7 +2823,12 @@ static int __init intel_pstate_init(void) id = x86_match_cpu(hwp_support_ids); if (id) { copy_cpu_funcs(&core_funcs); - if (!no_hwp) { + /* + * Avoid enabling HWP for processors without EPP support, + * because that means incomplete HWP implementation which is a + * corner case and supporting it is generally problematic. + */ + if (!no_hwp && boot_cpu_has(X86_FEATURE_HWP_EPP)) { hwp_active++; hwp_mode_bdw = id->driver_data; intel_pstate.attr = hwp_cpufreq_attrs; |