linux/drivers/idle/Kconfig

# SPDX-License-Identifier: GPL-2.0-only
config INTEL_IDLE
	bool "Cpuidle Driver for Intel Processors"
	depends on CPU_IDLE
	depends on X86
	depends on CPU_SUP_INTEL
	help
	  Enable intel_idle, a cpuidle driver that includes knowledge of
	  native Intel hardware idle features.  The acpi_idle driver
	  can be configured at the same time, in order to handle
	  processors intel_idle does not support.
treewide: Add SPDX license identifier - Makefile/Kconfig Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2019-05-19 12:07:45 +00:00			`# SPDX-License-Identifier: GPL-2.0-only`
intel_idle: native hardware cpuidle driver for latest Intel processors This EXPERIMENTAL driver supersedes acpi_idle on Intel Atom Processors, Intel Core i3/i5/i7 Processors and associated Intel Xeon processors. It does not support the Intel Core2 processor or earlier. For kernels configured with ACPI, CONFIG_INTEL_IDLE=y allows intel_idle to probe before the ACPI processor driver. Booting with "intel_idle.max_cstate=0" disables intel_idle and the system will fall back on ACPI's "acpi_idle". Typical Linux distributions load ACPI processor module early, making CONFIG_INTEL_IDLE=m not easily useful on ACPI platforms. intel_idle probes all processors at module_init time. Processors that are hot-added later will be limited to using C1 in idle. Signed-off-by: Len Brown <len.brown@intel.com> 2010-03-08 19:07:30 +00:00			`config INTEL_IDLE`
intel_idle: disable module support Right now the module capability is cauing more trouble than it is worth. At least one distro built intel_idle as a module where it lost the init race with ACPI, making it useless. Make intel_idle bool so that if you select it, you will use it. We can restore module capability after cpuidle is enhanced to handle run-time changing of idle drivers. Signed-off-by: Len Brown <len.brown@intel.com> 2010-08-14 18:40:36 +00:00			`bool "Cpuidle Driver for Intel Processors"`
intel_idle: native hardware cpuidle driver for latest Intel processors This EXPERIMENTAL driver supersedes acpi_idle on Intel Atom Processors, Intel Core i3/i5/i7 Processors and associated Intel Xeon processors. It does not support the Intel Core2 processor or earlier. For kernels configured with ACPI, CONFIG_INTEL_IDLE=y allows intel_idle to probe before the ACPI processor driver. Booting with "intel_idle.max_cstate=0" disables intel_idle and the system will fall back on ACPI's "acpi_idle". Typical Linux distributions load ACPI processor module early, making CONFIG_INTEL_IDLE=m not easily useful on ACPI platforms. intel_idle probes all processors at module_init time. Processors that are hot-added later will be limited to using C1 in idle. Signed-off-by: Len Brown <len.brown@intel.com> 2010-03-08 19:07:30 +00:00			`depends on CPU_IDLE`
			`depends on X86`
			`depends on CPU_SUP_INTEL`
			`help`
			`Enable intel_idle, a cpuidle driver that includes knowledge of`
			`native Intel hardware idle features. The acpi_idle driver`
			`can be configured at the same time, in order to handle`
			`processors intel_idle does not support.`