diff options
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/irqdesc.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index ee062b7939d3..a1d7a7d484e0 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -669,6 +669,41 @@ int __handle_domain_irq(struct irq_domain *domain, unsigned int hwirq, set_irq_regs(old_regs); return ret; } + +#ifdef CONFIG_IRQ_DOMAIN +/** + * handle_domain_nmi - Invoke the handler for a HW irq belonging to a domain + * @domain: The domain where to perform the lookup + * @hwirq: The HW irq number to convert to a logical one + * @regs: Register file coming from the low-level handling code + * + * Returns: 0 on success, or -EINVAL if conversion has failed + */ +int handle_domain_nmi(struct irq_domain *domain, unsigned int hwirq, + struct pt_regs *regs) +{ + struct pt_regs *old_regs = set_irq_regs(regs); + unsigned int irq; + int ret = 0; + + nmi_enter(); + + irq = irq_find_mapping(domain, hwirq); + + /* + * ack_bad_irq is not NMI-safe, just report + * an invalid interrupt. + */ + if (likely(irq)) + generic_handle_irq(irq); + else + ret = -EINVAL; + + nmi_exit(); + set_irq_regs(old_regs); + return ret; +} +#endif #endif /* Dynamic interrupt handling */ |