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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-12-13 09:55:14 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-12-16 12:06:18 +0100
commitbc94638886ab21f8247d3f7f39573d3feb7d8284 (patch)
treee74c747c0b82ced46eae2b09e1a2405fe4fc7b56 /include/linux/acpi.h
parentd1eef1c619749b2a57e514a3fa67d9a516ffa919 (diff)
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.h6
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 */