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CONFIG_LOAPIC_SPURIOUS_VECTOR
¶
Handle LOAPIC spurious interrupts
Type: bool
Help¶
A special situation may occur when a processor raises its task priority to be greater than or equal to the level of the interrupt for which the processor INTR signal is currently being asserted. If at the time the INTA cycle is issued, the interrupt that was to be dispensed has become masked (programmed by software), the local APIC will deliver a spurious-interrupt vector. Dispensing the spurious-interrupt vector does not affect the ISR, so the handler for this vector should return without an EOI. From x86 manual Volume 3 Section 10.9.
Defaults¶
No defaults. Implicitly defaults to n
.
Kconfig definition¶
At <Zephyr>/drivers/interrupt_controller/Kconfig.loapic:23
Included via <Zephyr>/Kconfig:8
→ <Zephyr>/Kconfig.zephyr:32
→ <Zephyr>/drivers/Kconfig:26
→ <Zephyr>/drivers/interrupt_controller/Kconfig:51
Menu path: (Top) → Device Drivers → Interrupt Controllers → LOAPIC
config LOAPIC_SPURIOUS_VECTOR
bool "Handle LOAPIC spurious interrupts"
depends on LOAPIC
help
A special situation may occur when a processor raises its task
priority to be greater than or equal to the level of the
interrupt for which the processor INTR signal is currently being
asserted. If at the time the INTA cycle is issued, the
interrupt that was to be dispensed has become masked (programmed
by software), the local APIC will deliver a spurious-interrupt
vector. Dispensing the spurious-interrupt vector does not affect
the ISR, so the handler for this vector should return without an EOI.
From x86 manual Volume 3 Section 10.9.
(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)