diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/Kconfig | 10 | ||||
| -rw-r--r-- | kernel/irq/irqdomain.c | 8 |
2 files changed, 14 insertions, 4 deletions
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig index 5a38bf4de641..d8e323d12496 100644 --- a/kernel/irq/Kconfig +++ b/kernel/irq/Kconfig @@ -56,6 +56,16 @@ config GENERIC_IRQ_CHIP config IRQ_DOMAIN bool +config IRQ_DOMAIN_DEBUG + bool "Expose hardware/virtual IRQ mapping via debugfs" + depends on IRQ_DOMAIN && DEBUG_FS + help + This option will show the mapping relationship between hardware irq + numbers and Linux irq numbers. The mapping is exposed via debugfs + in the file "virq_mapping". + + If you don't know what this means you don't need it. + # Support forced irq threading config IRQ_FORCED_THREADING bool diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index af48e59bc2ff..3601f3fbf67c 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -632,7 +632,7 @@ unsigned int irq_linear_revmap(struct irq_domain *domain, return revmap[hwirq]; } -#ifdef CONFIG_VIRQ_DEBUG +#ifdef CONFIG_IRQ_DOMAIN_DEBUG static int virq_debug_show(struct seq_file *m, void *private) { unsigned long flags; @@ -668,7 +668,7 @@ static int virq_debug_show(struct seq_file *m, void *private) data = irq_desc_get_chip_data(desc); seq_printf(m, "0x%16p ", data); - if (desc->irq_data.domain->of_node) + if (desc->irq_data.domain && desc->irq_data.domain->of_node) p = desc->irq_data.domain->of_node->full_name; else p = none; @@ -695,14 +695,14 @@ static const struct file_operations virq_debug_fops = { static int __init irq_debugfs_init(void) { - if (debugfs_create_file("virq_mapping", S_IRUGO, powerpc_debugfs_root, + if (debugfs_create_file("irq_domain_mapping", S_IRUGO, NULL, NULL, &virq_debug_fops) == NULL) return -ENOMEM; return 0; } __initcall(irq_debugfs_init); -#endif /* CONFIG_VIRQ_DEBUG */ +#endif /* CONFIG_IRQ_DOMAIN_DEBUG */ int irq_domain_simple_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hwirq) |