diff options
Diffstat (limited to 'arch/x86/kernel/acpi/cppc.c')
| -rw-r--r-- | arch/x86/kernel/acpi/cppc.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/x86/kernel/acpi/cppc.c b/arch/x86/kernel/acpi/cppc.c index aab9d0570841..d745dd586303 100644 --- a/arch/x86/kernel/acpi/cppc.c +++ b/arch/x86/kernel/acpi/cppc.c @@ -239,8 +239,10 @@ EXPORT_SYMBOL_GPL(amd_detect_prefcore); */ int amd_get_boost_ratio_numerator(unsigned int cpu, u64 *numerator) { + enum x86_topology_cpu_type core_type = get_topology_cpu_type(&cpu_data(cpu)); bool prefcore; int ret; + u32 tmp; ret = amd_detect_prefcore(&prefcore); if (ret) @@ -266,6 +268,27 @@ int amd_get_boost_ratio_numerator(unsigned int cpu, u64 *numerator) break; } } + + /* detect if running on heterogeneous design */ + if (cpu_feature_enabled(X86_FEATURE_AMD_HETEROGENEOUS_CORES)) { + switch (core_type) { + case TOPO_CPU_TYPE_UNKNOWN: + pr_warn("Undefined core type found for cpu %d\n", cpu); + break; + case TOPO_CPU_TYPE_PERFORMANCE: + /* use the max scale for performance cores */ + *numerator = CPPC_HIGHEST_PERF_PERFORMANCE; + return 0; + case TOPO_CPU_TYPE_EFFICIENCY: + /* use the highest perf value for efficiency cores */ + ret = amd_get_highest_perf(cpu, &tmp); + if (ret) + return ret; + *numerator = tmp; + return 0; + } + } + *numerator = CPPC_HIGHEST_PERF_PREFCORE; return 0; |