1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun #if defined(__i386__) || defined(__x86_64__) 3*4882a593Smuzhiyun 4*4882a593Smuzhiyun #include "helpers/helpers.h" 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun #define MSR_AMD_HWCR 0xc0010015 7*4882a593Smuzhiyun cpufreq_has_boost_support(unsigned int cpu,int * support,int * active,int * states)8*4882a593Smuzhiyunint cpufreq_has_boost_support(unsigned int cpu, int *support, int *active, 9*4882a593Smuzhiyun int *states) 10*4882a593Smuzhiyun { 11*4882a593Smuzhiyun struct cpupower_cpu_info cpu_info; 12*4882a593Smuzhiyun int ret; 13*4882a593Smuzhiyun unsigned long long val; 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun *support = *active = *states = 0; 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun ret = get_cpu_info(&cpu_info); 18*4882a593Smuzhiyun if (ret) 19*4882a593Smuzhiyun return ret; 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CBP) { 22*4882a593Smuzhiyun *support = 1; 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun /* AMD Family 0x17 does not utilize PCI D18F4 like prior 25*4882a593Smuzhiyun * families and has no fixed discrete boost states but 26*4882a593Smuzhiyun * has Hardware determined variable increments instead. 27*4882a593Smuzhiyun */ 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun if (cpu_info.family == 0x17 || cpu_info.family == 0x18) { 30*4882a593Smuzhiyun if (!read_msr(cpu, MSR_AMD_HWCR, &val)) { 31*4882a593Smuzhiyun if (!(val & CPUPOWER_AMD_CPBDIS)) 32*4882a593Smuzhiyun *active = 1; 33*4882a593Smuzhiyun } 34*4882a593Smuzhiyun } else { 35*4882a593Smuzhiyun ret = amd_pci_get_num_boost_states(active, states); 36*4882a593Smuzhiyun if (ret) 37*4882a593Smuzhiyun return ret; 38*4882a593Smuzhiyun } 39*4882a593Smuzhiyun } else if (cpupower_cpu_info.caps & CPUPOWER_CAP_INTEL_IDA) 40*4882a593Smuzhiyun *support = *active = 1; 41*4882a593Smuzhiyun return 0; 42*4882a593Smuzhiyun } 43*4882a593Smuzhiyun #endif /* #if defined(__i386__) || defined(__x86_64__) */ 44