1 // SPDX-License-Identifier: GPL-2.0 2 #if defined(__i386__) || defined(__x86_64__) 3 4 #include "helpers/helpers.h" 5 6 #define MSR_AMD_HWCR 0xc0010015 7 cpufreq_has_boost_support(unsigned int cpu,int * support,int * active,int * states)8int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active, 9 int *states) 10 { 11 struct cpupower_cpu_info cpu_info; 12 int ret; 13 unsigned long long val; 14 15 *support = *active = *states = 0; 16 17 ret = get_cpu_info(&cpu_info); 18 if (ret) 19 return ret; 20 21 if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CBP) { 22 *support = 1; 23 24 /* AMD Family 0x17 does not utilize PCI D18F4 like prior 25 * families and has no fixed discrete boost states but 26 * has Hardware determined variable increments instead. 27 */ 28 29 if (cpu_info.family == 0x17) { 30 if (!read_msr(cpu, MSR_AMD_HWCR, &val)) { 31 if (!(val & CPUPOWER_AMD_CPBDIS)) 32 *active = 1; 33 } 34 } else { 35 ret = amd_pci_get_num_boost_states(active, states); 36 if (ret) 37 return ret; 38 } 39 } else if (cpupower_cpu_info.caps & CPUPOWER_CAP_INTEL_IDA) 40 *support = *active = 1; 41 return 0; 42 } 43 #endif /* #if defined(__i386__) || defined(__x86_64__) */ 44
