Certain interrupt controllers (e.g., APIC) are capable of delivering interrupts to the CPU as non-maskable. Add the new IRQD_DELIVER_AS_NMI interrupt state flag. The purpose of this flag is to communicate to the underlying irqchip whether the interrupt must be delivered in this manner.
Cc: Ashok Raj <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Tony Luck <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Jacob Pan <[email protected]> Cc: Marc Zyngier <[email protected]> Cc: Bartosz Golaszewski <[email protected]> Cc: Doug Berger <[email protected]> Cc: Palmer Dabbelt <[email protected]> Cc: Randy Dunlap <[email protected]> Cc: "Ravi V. Shankar" <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Ricardo Neri <[email protected]> --- include/linux/irq.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/linux/irq.h b/include/linux/irq.h index 65916a3..7271a2c 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -208,6 +208,7 @@ struct irq_data { * IRQD_SINGLE_TARGET - IRQ allows only a single affinity target * IRQD_DEFAULT_TRIGGER_SET - Expected trigger already been set * IRQD_CAN_RESERVE - Can use reservation mode + * IRQD_DELIVER_AS_NMI - Deliver this interrupt as non-maskable */ enum { IRQD_TRIGGER_MASK = 0xf, @@ -230,6 +231,7 @@ enum { IRQD_SINGLE_TARGET = (1 << 24), IRQD_DEFAULT_TRIGGER_SET = (1 << 25), IRQD_CAN_RESERVE = (1 << 26), + IRQD_DELIVER_AS_NMI = (1 << 27), }; #define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors) @@ -389,6 +391,16 @@ static inline bool irqd_can_reserve(struct irq_data *d) return __irqd_to_state(d) & IRQD_CAN_RESERVE; } +static inline void irqd_set_deliver_as_nmi(struct irq_data *d) +{ + __irqd_to_state(d) |= IRQD_DELIVER_AS_NMI; +} + +static inline bool irqd_deliver_as_nmi(struct irq_data *d) +{ + return __irqd_to_state(d) & IRQD_DELIVER_AS_NMI; +} + #undef __irqd_to_state static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d) -- 2.7.4 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
