:orphan:

.. title:: CONFIG_APIC_TIMER

.. kconfig:: CONFIG_APIC_TIMER

CONFIG_APIC_TIMER
#################

*New local APIC timer*

Type: ``bool``

Help
====

.. code-block:: none

    Use the x86 local APIC in one-shot mode as the system time
    source.  NOTE: this probably isn't what you want except on
    older or idiosyncratic hardware (or environments like qemu
    without complete APIC emulation).  Modern hardware will work
    better with CONFIG_APIC_TSC_DEADLINE_TIMER.

Direct dependencies
===================

\ :kconfig:`X86 <CONFIG_X86>` && \ :kconfig:`LOAPIC <CONFIG_LOAPIC>`

*(Includes any dependencies from ifs and menus.)*

Defaults
========

No defaults. Implicitly defaults to ``n``.

Symbols selected by this symbol
===============================

- \ :kconfig:`TICKLESS_CAPABLE <CONFIG_TICKLESS_CAPABLE>`

Kconfig definition
==================



At ``<Driver>/timer/Kconfig.apic:6``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:42`` → ``<Driver>/Kconfig:30`` → ``<Driver>/timer/Kconfig:58``

Menu path: (Top) → Device Drivers → Timer Drivers

.. code-block:: kconfig

    menuconfig APIC_TIMER
    	bool "New local APIC timer"
    	select TICKLESS_CAPABLE
    	depends on X86 && LOAPIC
    	help
    	  Use the x86 local APIC in one-shot mode as the system time
    	  source.  NOTE: this probably isn't what you want except on
    	  older or idiosyncratic hardware (or environments like qemu
    	  without complete APIC emulation).  Modern hardware will work
    	  better with CONFIG_APIC_TSC_DEADLINE_TIMER.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*