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| author | Huang Rui <ray.huang@amd.com> | 2022-02-22 23:34:18 +0800 |
|---|---|---|
| committer | Shuah Khan <skhan@linuxfoundation.org> | 2022-02-22 18:36:32 -0700 |
| commit | 46c273a0958274f1e1e69f3540ae827a92e0660f (patch) | |
| tree | 47dfc4b60693250f3330a02e402ed4882df21648 /tools/power/cpupower/utils/helpers/helpers.h | |
| parent | c8be60c12041145e663249af261286d402b4c5e3 (diff) | |
| download | lwn-46c273a0958274f1e1e69f3540ae827a92e0660f.tar.gz lwn-46c273a0958274f1e1e69f3540ae827a92e0660f.zip | |
cpupower: Add the function to check AMD P-State enabled
The processor with AMD P-State function also supports legacy ACPI
hardware P-States feature as well. Once driver sets AMD P-State eanbled,
the processor will respond the finer grain AMD P-State feature instead of
legacy ACPI P-States. So it introduces the cpupower_amd_pstate_enabled()
to check whether the current kernel enables AMD P-State or AMD CPUFreq
module.
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'tools/power/cpupower/utils/helpers/helpers.h')
| -rw-r--r-- | tools/power/cpupower/utils/helpers/helpers.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/tools/power/cpupower/utils/helpers/helpers.h b/tools/power/cpupower/utils/helpers/helpers.h index b4813efdfb00..62771a086871 100644 --- a/tools/power/cpupower/utils/helpers/helpers.h +++ b/tools/power/cpupower/utils/helpers/helpers.h @@ -11,6 +11,7 @@ #include <libintl.h> #include <locale.h> +#include <stdbool.h> #include "helpers/bitmask.h" #include <cpupower.h> @@ -136,6 +137,12 @@ extern int decode_pstates(unsigned int cpu, int boost_states, extern int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active, int * states); + +/* AMD P-State stuff **************************/ +bool cpupower_amd_pstate_enabled(void); + +/* AMD P-State stuff **************************/ + /* * CPUID functions returning a single datum */ @@ -168,6 +175,9 @@ static inline int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active, int * states) { return -1; } +static inline bool cpupower_amd_pstate_enabled(void) +{ return false; } + /* cpuid and cpuinfo helpers **************************/ static inline unsigned int cpuid_eax(unsigned int op) { return 0; }; |