Preferred core rankings can be changed dynamically by the platform based on the workload and platform conditions and accounting for thermals and aging. When this occurs, cpu priority need to be set.
Signed-off-by: Meng Li li.meng@amd.com --- drivers/cpufreq/amd-pstate.c | 32 ++++++++++++++++++++++++++++++++ include/linux/amd-pstate.h | 1 + 2 files changed, 33 insertions(+)
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index e919b3f4ab18..ba10aa971dcb 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -320,6 +320,7 @@ static int pstate_init_perf(struct amd_cpudata *cpudata) WRITE_ONCE(cpudata->nominal_perf, AMD_CPPC_NOMINAL_PERF(cap1)); WRITE_ONCE(cpudata->lowest_nonlinear_perf, AMD_CPPC_LOWNONLIN_PERF(cap1)); WRITE_ONCE(cpudata->lowest_perf, AMD_CPPC_LOWEST_PERF(cap1)); + WRITE_ONCE(cpudata->prefcore_highest_perf, AMD_CPPC_HIGHEST_PERF(cap1));
return 0; } @@ -341,6 +342,7 @@ static int cppc_init_perf(struct amd_cpudata *cpudata) WRITE_ONCE(cpudata->lowest_nonlinear_perf, cppc_perf.lowest_nonlinear_perf); WRITE_ONCE(cpudata->lowest_perf, cppc_perf.lowest_perf); + WRITE_ONCE(cpudata->prefcore_highest_perf, cppc_perf.highest_perf);
if (cppc_state == AMD_PSTATE_ACTIVE) return 0; @@ -743,6 +745,34 @@ static void amd_pstate_init_prefcore(void) schedule_work(&sched_prefcore_work); }
+static void amd_pstate_update_highest_perf(unsigned int cpu) +{ + struct cpufreq_policy *policy; + struct amd_cpudata *cpudata; + u32 prev_high = 0, cur_high = 0; + u64 highest_perf; + int ret; + + if (!prefcore_enabled) + return; + + ret = amd_pstate_get_highest_perf(cpu, &highest_perf); + if (ret) + return; + + policy = cpufreq_cpu_get(cpu); + cpudata = policy->driver_data; + cur_high = highest_perf; + prev_high = READ_ONCE(cpudata->prefcore_highest_perf); + + if (prev_high != cur_high) { + WRITE_ONCE(cpudata->prefcore_highest_perf, cur_high); + sched_set_itmt_core_prio(cur_high, cpu); + } + + cpufreq_cpu_put(policy); +} + /* * Check if AMD Pstate Preferred core feature is supported and enabled * 1) no_prefcore is used to enable or disable AMD Pstate Preferred Core @@ -1497,6 +1527,7 @@ static struct cpufreq_driver amd_pstate_driver = { .suspend = amd_pstate_cpu_suspend, .resume = amd_pstate_cpu_resume, .set_boost = amd_pstate_set_boost, + .update_highest_perf = amd_pstate_update_highest_perf, .name = "amd-pstate", .attr = amd_pstate_attr, }; @@ -1511,6 +1542,7 @@ static struct cpufreq_driver amd_pstate_epp_driver = { .online = amd_pstate_epp_cpu_online, .suspend = amd_pstate_epp_suspend, .resume = amd_pstate_epp_resume, + .update_highest_perf = amd_pstate_update_highest_perf, .name = "amd-pstate-epp", .attr = amd_pstate_epp_attr, }; diff --git a/include/linux/amd-pstate.h b/include/linux/amd-pstate.h index 446394f84606..fa86bc953d3e 100644 --- a/include/linux/amd-pstate.h +++ b/include/linux/amd-pstate.h @@ -70,6 +70,7 @@ struct amd_cpudata { u32 nominal_perf; u32 lowest_nonlinear_perf; u32 lowest_perf; + u32 prefcore_highest_perf;
u32 max_freq; u32 min_freq;