CONFIG_IOAPIC_NUM_RTES

Number of Redirection Table Entries available

Type: int

Help

This option indicates the maximum number of Redirection Table Entries (RTEs) (one per IRQ available to the IO-APIC) made available to the kernel, regardless of the number provided by the hardware itself. For most efficient usage of memory, it should match the number of IRQ lines needed by devices connected to the IO-APIC.

Direct dependencies

IOAPIC && LOAPIC

(Includes any dependencies from ifs and menus.)

Default

  • 24

Kconfig definition

At drivers/interrupt_controller/Kconfig.loapic:52

Included via Kconfig:8Kconfig.zephyr:40drivers/Kconfig:22drivers/interrupt_controller/Kconfig:44

Menu path: (Top) → Device Drivers → Interrupt Controllers → LOAPIC → IO-APIC

config IOAPIC_NUM_RTES
    int "Number of Redirection Table Entries available"
    default 24
    depends on IOAPIC && LOAPIC
    help
      This option indicates the maximum number of Redirection Table Entries
      (RTEs) (one per IRQ available to the IO-APIC) made available to the
      kernel, regardless of the number provided by the hardware itself. For
      most efficient usage of memory, it should match the number of IRQ lines
      needed by devices connected to the IO-APIC.

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)