| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <acpi/acpi_pm.h> |
| #include <acpi/acpigen.h> |
| #include <amdblocks/cppc.h> |
| #include <arch/cpu.h> |
| #include <soc/msr.h> |
| #include <types.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'. |
| */ |
| static void cpu_init_cppc_config(struct cppc_config *config, u32 version) |
| { |
| uint32_t lowest_freq_mhz; |
| uint32_t nominal_freq_mhz; |
| |
| 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] = |
| get_ccx_cppc_min_frequency(&lowest_freq_mhz) == CB_SUCCESS ? |
| CPPC_DWORD(lowest_freq_mhz) : CPPC_UNSUPPORTED; |
| config->entries[CPPC_NOMINAL_FREQ] = |
| get_ccx_cppc_nom_frequency(&nominal_freq_mhz) == CB_SUCCESS ? |
| CPPC_DWORD(nominal_freq_mhz) : 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(); |
| } |