This symbol will be used by intel-pstate and amd-pstate for making decisions based on what the FADT indicates the system pm profile is. Suggested-by: Gautham Ranjal Shenoy <gautham.shenoy@xxxxxxx> Link: https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/05_ACPI_Software_Programming_Model/ACPI_Software_Programming_Model.html#fixed-acpi-description-table-fadt Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx> --- drivers/acpi/cppc_acpi.c | 34 ++++++++++++++++++++++++++++++++++ include/acpi/actbl.h | 3 ++- include/acpi/processor.h | 10 ++++++++++ 3 files changed, 46 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 7ff269a78c20..d8827eae3ba4 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -941,6 +941,40 @@ void acpi_cppc_processor_exit(struct acpi_processor *pr) } EXPORT_SYMBOL_GPL(acpi_cppc_processor_exit); + +/** + * acpi_pm_profile_server() - Check if the system is a server. + * + * Return: true for server profiles, false for anything else + */ +bool acpi_pm_profile_server(void) +{ + switch (acpi_gbl_FADT.preferred_profile) { + case PM_ENTERPRISE_SERVER: + case PM_SOHO_SERVER: + case PM_PERFORMANCE_SERVER: + return true; + } + return false; +} +EXPORT_SYMBOL_GPL(acpi_pm_profile_server); + +/** + * acpi_pm_profile_undefined() - Check if the system is an undefined pm profile. + * + * Return: true for undefined profiles, false for anything else + */ +bool acpi_pm_profile_undefined(void) +{ + if (acpi_gbl_FADT.preferred_profile == PM_UNSPECIFIED) + return true; + if (acpi_gbl_FADT.preferred_profile >= NR_PM_PROFILES) + return true; + return false; +} +EXPORT_SYMBOL_GPL(acpi_pm_profile_undefined); + + /** * cpc_read_ffh() - Read FFH register * @cpunum: CPU number to read diff --git a/include/acpi/actbl.h b/include/acpi/actbl.h index e5dfb6f4de52..451f6276da49 100644 --- a/include/acpi/actbl.h +++ b/include/acpi/actbl.h @@ -307,7 +307,8 @@ enum acpi_preferred_pm_profiles { PM_SOHO_SERVER = 5, PM_APPLIANCE_PC = 6, PM_PERFORMANCE_SERVER = 7, - PM_TABLET = 8 + PM_TABLET = 8, + NR_PM_PROFILES = 9 }; /* Values for sleep_status and sleep_control registers (V5+ FADT) */ diff --git a/include/acpi/processor.h b/include/acpi/processor.h index 94181fe9780a..05a45ebddaea 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -360,6 +360,8 @@ int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id); #ifdef CONFIG_ACPI_CPPC_LIB extern int acpi_cppc_processor_probe(struct acpi_processor *pr); extern void acpi_cppc_processor_exit(struct acpi_processor *pr); +extern bool acpi_pm_profile_server(void); +extern bool acpi_pm_profile_undefined(void); #else static inline int acpi_cppc_processor_probe(struct acpi_processor *pr) { @@ -369,6 +371,14 @@ static inline void acpi_cppc_processor_exit(struct acpi_processor *pr) { return; } +static inline bool acpi_pm_profile_server(void) +{ + return false; +} +static inline bool acpi_pm_profile_undefined(void) +{ + return true; +} #endif /* CONFIG_ACPI_CPPC_LIB */ /* in processor_pdc.c */ -- 2.34.1
