| // SPDX-License-Identifier: GPL-2.0 |
| #if defined(__i386__) || defined(__x86_64__) |
| |
| #include "helpers/helpers.h" |
| |
| #define MSR_AMD_HWCR 0xc0010015 |
| |
| int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active, |
| int *states) |
| { |
| struct cpupower_cpu_info cpu_info; |
| int ret; |
| unsigned long long val; |
| |
| *support = *active = *states = 0; |
| |
| ret = get_cpu_info(&cpu_info); |
| if (ret) |
| return ret; |
| |
| if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CBP) { |
| *support = 1; |
| |
| /* AMD Family 0x17 does not utilize PCI D18F4 like prior |
| * families and has no fixed discrete boost states but |
| * has Hardware determined variable increments instead. |
| */ |
| |
| if (cpu_info.family == 0x17) { |
| if (!read_msr(cpu, MSR_AMD_HWCR, &val)) { |
| if (!(val & CPUPOWER_AMD_CPBDIS)) |
| *active = 1; |
| } |
| } else { |
| ret = amd_pci_get_num_boost_states(active, states); |
| if (ret) |
| return ret; |
| } |
| } else if (cpupower_cpu_info.caps & CPUPOWER_CAP_INTEL_IDA) |
| *support = *active = 1; |
| return 0; |
| } |
| #endif /* #if defined(__i386__) || defined(__x86_64__) */ |
