diff options
| author | Mario Limonciello <mario.limonciello@amd.com> | 2024-08-26 16:13:55 -0500 |
|---|---|---|
| committer | Mario Limonciello <mario.limonciello@amd.com> | 2024-09-11 10:23:23 -0500 |
| commit | 279f838a61f96cbfeb1f9ba060e4a452e6e041d0 (patch) | |
| tree | 4ca5d112e8e09887ea34030509f45830f2129215 /include/acpi | |
| parent | 2819bfef6483c66c55064ca678f2630a1a09f3f9 (diff) | |
x86/amd: Detect preferred cores in amd_get_boost_ratio_numerator()
AMD systems that support preferred cores will use "166" as their
numerator for max frequency calculations instead of "255".
Add a function for detecting preferred cores by looking at the
highest perf value on all cores.
If preferred cores are enabled return 166 and if disabled the
value in the highest perf register. As the function will be called
multiple times, cache the values for the boost numerator and if
preferred cores will be enabled in global variables.
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Diffstat (limited to 'include/acpi')
| -rw-r--r-- | include/acpi/cppc_acpi.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/acpi/cppc_acpi.h b/include/acpi/cppc_acpi.h index f7c7abf2a95e..482e0587a041 100644 --- a/include/acpi/cppc_acpi.h +++ b/include/acpi/cppc_acpi.h @@ -161,6 +161,7 @@ extern int cppc_get_auto_sel_caps(int cpunum, struct cppc_perf_caps *perf_caps); extern int cppc_set_auto_sel(int cpu, bool enable); extern int amd_get_highest_perf(unsigned int cpu, u32 *highest_perf); extern int amd_get_boost_ratio_numerator(unsigned int cpu, u64 *numerator); +extern int amd_detect_prefcore(bool *detected); #else /* !CONFIG_ACPI_CPPC_LIB */ static inline int cppc_get_desired_perf(int cpunum, u64 *desired_perf) { @@ -242,6 +243,10 @@ static inline int amd_get_boost_ratio_numerator(unsigned int cpu, u64 *numerator { return -EOPNOTSUPP; } +static inline int amd_detect_prefcore(bool *detected) +{ + return -ENODEV; +} #endif /* !CONFIG_ACPI_CPPC_LIB */ #endif /* _CPPC_ACPI_H*/ |