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| author |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-12-13 09:55:14 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-12-16 12:06:18 +0100 |
| commit | bc94638886ab21f8247d3f7f39573d3feb7d8284 (patch) | |
| tree | e74c747c0b82ced46eae2b09e1a2405fe4fc7b56 /include/linux/acpi.h | |
| parent | Linux 5.5-rc2 (diff) | |
| download | wireguard-linux-bc94638886ab21f8247d3f7f39573d3feb7d8284.tar.xz wireguard-linux-bc94638886ab21f8247d3f7f39573d3feb7d8284.zip | |
ACPI: processor: Export function to claim _CST control
The intel_idle driver will be modified to use ACPI _CST subsequently
and it will need to notify the platform firmware of that if
acpi_gbl_FADT.cst_control is set, so add a routine for this purpose,
acpi_processor_claim_cst_control(), to acpi_processor.c (so that it
is always present which is required by intel_idle) and export it
to allow the ACPI processor driver (which is modular) to call it.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/acpi.h')
| -rw-r--r-- | include/linux/acpi.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 0f37a7d5fa77..ee39b05e7f76 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -279,6 +279,12 @@ static inline bool invalid_phys_cpuid(phys_cpuid_t phys_id) /* Validate the processor object's proc_id */ bool acpi_duplicate_processor_id(int proc_id); +/* Processor _CTS control */ +#ifdef CONFIG_ACPI_PROCESSOR_CSTATE +bool acpi_processor_claim_cst_control(void); +#else +static inline bool acpi_processor_claim_cst_control(void) { return false; } +#endif #ifdef CONFIG_ACPI_HOTPLUG_CPU /* Arch dependent functions for cpu hotplug support */ |