diff options
| -rw-r--r-- | tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c | 44 |
1 files changed, 36 insertions, 8 deletions
diff --git a/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c b/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c index c883f211dbcc..2bf0f878441e 100644 --- a/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c +++ b/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c @@ -4,7 +4,7 @@ * policy preference bias on recent X86 processors. */ /* - * Copyright (c) 2010 - 2017 Intel Corporation. + * Copyright (c) 2010 - 2025 Intel Corporation. * Len Brown <len.brown@intel.com> */ @@ -517,7 +517,7 @@ void for_packages(unsigned long long pkg_set, int (func)(int)) void print_version(void) { - printf("x86_energy_perf_policy 17.05.11 (C) Len Brown <len.brown@intel.com>\n"); + printf("x86_energy_perf_policy 2025.9.19 Len Brown <lenb@kernel.org>\n"); } void cmdline(int argc, char **argv) @@ -1312,6 +1312,17 @@ void for_all_cpus_in_set(size_t set_size, cpu_set_t *cpu_set, int (func)(int)) if (CPU_ISSET_S(cpu_num, set_size, cpu_set)) func(cpu_num); } +int for_all_cpus_in_set_and(size_t set_size, cpu_set_t *cpu_set, int (func)(int)) +{ + int cpu_num; + int retval = 1; + + for (cpu_num = 0; cpu_num <= max_cpu_num; ++cpu_num) + if (CPU_ISSET_S(cpu_num, set_size, cpu_set)) + retval &= func(cpu_num); + + return retval; +} void init_data_structures(void) { @@ -1326,21 +1337,38 @@ void init_data_structures(void) for_all_proc_cpus(mark_cpu_present); } -/* clear has_hwp if it is not enable (or being enabled) */ +int is_hwp_enabled_on_cpu(int cpu_num) +{ + unsigned long long msr; + int retval; + + /* MSR_PM_ENABLE[1] == 1 if HWP is enabled and MSRs visible */ + get_msr(cpu_num, MSR_PM_ENABLE, &msr); + retval = (msr & 1); + if (verbose) + fprintf(stderr, "cpu%d: %sHWP\n", cpu_num, retval ? "" : "No-"); + + return retval; +} + +/* + * verify_hwp_is_enabled() + * + * Set (has_hwp=0) if no HWP feature or any of selected CPU set does not have HWP enabled + */ void verify_hwp_is_enabled(void) { - unsigned long long msr; + int retval; if (!has_hwp) /* set in early_cpuid() */ return; - /* MSR_PM_ENABLE[1] == 1 if HWP is enabled and MSRs visible */ - get_msr(base_cpu, MSR_PM_ENABLE, &msr); - if ((msr & 1) == 0) { + retval = for_all_cpus_in_set_and(cpu_setsize, cpu_selected_set, is_hwp_enabled_on_cpu); + + if (retval == 0) { fprintf(stderr, "HWP can be enabled using '--hwp-enable'\n"); has_hwp = 0; - return; } } |