@@ -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
@@ -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) */
@@ -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 */
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@amd.com> 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@amd.com> --- drivers/acpi/cppc_acpi.c | 34 ++++++++++++++++++++++++++++++++++ include/acpi/actbl.h | 3 ++- include/acpi/processor.h | 10 ++++++++++ 3 files changed, 46 insertions(+), 1 deletion(-)