projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 7fe2f639 DB |
2 | #if defined(__i386__) || defined(__x86_64__) |
| 3 | ||
| 4 | #include "helpers/helpers.h" | |
| 5 | ||
| 902bef73 SH |
6 | #define MSR_AMD_HWCR 0xc0010015 |
| 7 | ||
| 2cd005ca DB |
8 | int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active, |
| 9 | int *states) | |
| 7fe2f639 DB |
10 | { |
| 11 | struct cpupower_cpu_info cpu_info; | |
| 12 | int ret; | |
| 902bef73 | 13 | unsigned long long val; |
| 7fe2f639 DB |
14 | |
| 15 | *support = *active = *states = 0; | |
| 16 | ||
| d0e4a193 | 17 | ret = get_cpu_info(&cpu_info); |
| 7fe2f639 DB |
18 | if (ret) |
| 19 | return ret; | |
| 20 | ||
| 21 | if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CBP) { | |
| 22 | *support = 1; | |
| 902bef73 SH |
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 | } | |
| 029e9f73 TR |
39 | } else if (cpupower_cpu_info.caps & CPUPOWER_CAP_INTEL_IDA) |
| 40 | *support = *active = 1; | |
| 7fe2f639 DB |
41 | return 0; |
| 42 | } | |
| 43 | #endif /* #if defined(__i386__) || defined(__x86_64__) */ |