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authorLen Brown <len.brown@intel.com>2010-03-08 14:07:30 -0500
committerLen Brown <len.brown@intel.com>2010-05-28 14:26:20 -0400
commit2671717265ae6e720a9ba5f13fbec3a718983b65 (patch)
tree16a3c688e297a9a69421640410f7140a6114a8e3 /drivers/idle/Kconfig
parent02cf4f9808382af7265cafc33dc86ec5875526aa (diff)
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>
Diffstat (limited to 'drivers/idle/Kconfig')
-rw-r--r--drivers/idle/Kconfig11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/idle/Kconfig b/drivers/idle/Kconfig
index f15e90a453d..fb5c5186d4a 100644
--- a/drivers/idle/Kconfig
+++ b/drivers/idle/Kconfig
@@ -1,3 +1,14 @@
+config INTEL_IDLE
+ tristate "Cpuidle Driver for Intel Processors"
+ depends on CPU_IDLE
+ depends on X86
+ depends on CPU_SUP_INTEL
+ depends on EXPERIMENTAL
+ 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.
menu "Memory power savings"
depends on X86_64