/* SPDX-License-Identifier: GPL-2.0-only */ #include <acpi/acpi_pm.h> #include <acpi/acpigen.h> #include <arch/cpu.h> #include <soc/cppc.h> #include <soc/msr.h> /* * version 2 is expected to be the typical use case. * For now this function 'punts' on version 3 and just * populates the additional fields with 'unsupported'. */ void cpu_init_cppc_config(struct cppc_config *config, u32 version) { config->version = version; config->entries[CPPC_HIGHEST_PERF] = CPPC_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_HIGHEST_PERF, 8); config->entries[CPPC_NOMINAL_PERF] = CPPC_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_NOMINAL_PERF, 8); config->entries[CPPC_LOWEST_NONL_PERF] = CPPC_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_LOW_NON_LIN_PERF, 8); config->entries[CPPC_LOWEST_PERF] = CPPC_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_LOWEST_PERF, 8); config->entries[CPPC_GUARANTEED_PERF] = CPPC_UNSUPPORTED; config->entries[CPPC_DESIRED_PERF] = CPPC_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_DES_PERF, 8); config->entries[CPPC_MIN_PERF] = CPPC_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_MIN_PERF, 8); config->entries[CPPC_MAX_PERF] = CPPC_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_MAX_PERF, 8); config->entries[CPPC_PERF_REDUCE_TOLERANCE] = CPPC_UNSUPPORTED; config->entries[CPPC_TIME_WINDOW] = CPPC_UNSUPPORTED; config->entries[CPPC_COUNTER_WRAP] = CPPC_UNSUPPORTED; config->entries[CPPC_REF_PERF_COUNTER] = CPPC_REG_MSR(MSR_MAX_PERFORMANCE_FREQUENCY_CLOCK_COUNT, 0, 64); config->entries[CPPC_DELIVERED_PERF_COUNTER] = CPPC_REG_MSR(MSR_ACTUAL_PERFORMANCE_FREQUENCY_CLOCK_COUNT, 0, 64); config->entries[CPPC_PERF_LIMITED] = CPPC_REG_MSR(MSR_CPPC_STATUS, 1, 1); config->entries[CPPC_ENABLE] = CPPC_REG_MSR(MSR_CPPC_ENABLE, 0, 1); if (version < 2) return; config->entries[CPPC_AUTO_SELECT] = CPPC_UNSUPPORTED; config->entries[CPPC_AUTO_ACTIVITY_WINDOW] = CPPC_UNSUPPORTED; config->entries[CPPC_PERF_PREF] = CPPC_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_ENERGY_PERF_PREF, 8); config->entries[CPPC_REF_PERF] = CPPC_UNSUPPORTED; if (version < 3) return; config->entries[CPPC_LOWEST_FREQ] = CPPC_UNSUPPORTED; config->entries[CPPC_NOMINAL_FREQ] = CPPC_UNSUPPORTED; } void generate_cppc_entries(unsigned int core_id) { /* Generate GCPC package in first logical core */ if (core_id == 0) { struct cppc_config cppc_config; cpu_init_cppc_config(&cppc_config, CPPC_VERSION_3); acpigen_write_CPPC_package(&cppc_config); } /* Write _CPC entry for each logical core */ acpigen_write_CPPC_method(); }