diff options
Diffstat (limited to 'tools/power/cpupower/utils/helpers/misc.c')
| -rw-r--r-- | tools/power/cpupower/utils/helpers/misc.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c new file mode 100644 index 000000000..f406adc40 --- /dev/null +++ b/tools/power/cpupower/utils/helpers/misc.c @@ -0,0 +1,43 @@ +// 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 || cpu_info.family == 0x18) { + 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__) */ |