diff options
Diffstat (limited to 'drivers/cpufreq/intel_pstate.c')
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 815df3daae9d..dec2a5649ac1 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -338,6 +338,8 @@ static void intel_pstste_sched_itmt_work_fn(struct work_struct *work) static DECLARE_WORK(sched_itmt_work, intel_pstste_sched_itmt_work_fn); +#define CPPC_MAX_PERF U8_MAX + static void intel_pstate_set_itmt_prio(int cpu) { struct cppc_perf_caps cppc_perf; @@ -349,6 +351,14 @@ static void intel_pstate_set_itmt_prio(int cpu) return; /* + * On some systems with overclocking enabled, CPPC.highest_perf is hardcoded to 0xff. + * In this case we can't use CPPC.highest_perf to enable ITMT. + * In this case we can look at MSR_HWP_CAPABILITIES bits [8:0] to decide. + */ + if (cppc_perf.highest_perf == CPPC_MAX_PERF) + cppc_perf.highest_perf = HWP_HIGHEST_PERF(READ_ONCE(all_cpu_data[cpu]->hwp_cap_cached)); + + /* * The priorities can be set regardless of whether or not * sched_set_itmt_support(true) has been called and it is valid to * update them at any time after it has been called. @@ -1006,6 +1016,12 @@ static void intel_pstate_hwp_offline(struct cpudata *cpu) */ value &= ~GENMASK_ULL(31, 24); value |= HWP_ENERGY_PERF_PREFERENCE(cpu->epp_cached); + /* + * However, make sure that EPP will be set to "performance" when + * the CPU is brought back online again and the "performance" + * scaling algorithm is still in effect. + */ + cpu->epp_policy = CPUFREQ_POLICY_UNKNOWN; } /* @@ -2353,6 +2369,7 @@ static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] __initconst = { X86_MATCH(BROADWELL_D, core_funcs), X86_MATCH(BROADWELL_X, core_funcs), X86_MATCH(SKYLAKE_X, core_funcs), + X86_MATCH(ICELAKE_X, core_funcs), {} }; |