CONFIG_APIC_TIMER¶

New local APIC timer

Type: bool

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.

Direct dependencies¶

X86 && LOAPIC

(Includes any dependencies from ifs and menus.)

Defaults¶

No defaults. Implicitly defaults to n.

Symbols selected by this symbol¶

TICKLESS_CAPABLE

Kconfig definition¶

At <Zephyr Driver>/timer/Kconfig:10

Included via Kconfig:8 → Kconfig.zephyr:42 → <Zephyr Driver>/Kconfig:30

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

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.)