[RFC PATCH 02/23] genirq: Introduce IRQD_DELIVER_AS_NMI
From: Ricardo Neri <hidden>
Date: 2018-06-13 01:07:07
Also in:
linux-iommu, lkml, sparclinux
Subsystem:
irq subsystem, the rest · Maintainers:
Thomas Gleixner, Linus Torvalds
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 <redacted> Cc: Andi Kleen <redacted> Cc: Tony Luck <tony.luck@intel.com> Cc: Borislav Petkov <redacted> Cc: Jacob Pan <redacted> Cc: Marc Zyngier <redacted> Cc: Bartosz Golaszewski <redacted> Cc: Doug Berger <opendmb@gmail.com> Cc: Palmer Dabbelt <redacted> Cc: Randy Dunlap <redacted> Cc: "Ravi V. Shankar" <redacted> Cc: x86@kernel.org Cc: iommu@lists.linux-foundation.org Signed-off-by: Ricardo Neri <redacted> --- 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