diff options
Diffstat (limited to 'arch/riscv/kernel/irq.c')
| -rw-r--r-- | arch/riscv/kernel/irq.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/riscv/kernel/irq.c b/arch/riscv/kernel/irq.c index eb9a68a539e6..a1dcf8e43b3c 100644 --- a/arch/riscv/kernel/irq.c +++ b/arch/riscv/kernel/irq.c @@ -28,6 +28,38 @@ struct fwnode_handle *riscv_get_intc_hwnode(void) } EXPORT_SYMBOL_GPL(riscv_get_intc_hwnode); +#ifdef CONFIG_IRQ_STACKS +#include <asm/irq_stack.h> + +DEFINE_PER_CPU(ulong *, irq_stack_ptr); + +#ifdef CONFIG_VMAP_STACK +static void init_irq_stacks(void) +{ + int cpu; + ulong *p; + + for_each_possible_cpu(cpu) { + p = arch_alloc_vmap_stack(IRQ_STACK_SIZE, cpu_to_node(cpu)); + per_cpu(irq_stack_ptr, cpu) = p; + } +} +#else +/* irq stack only needs to be 16 byte aligned - not IRQ_STACK_SIZE aligned. */ +DEFINE_PER_CPU_ALIGNED(ulong [IRQ_STACK_SIZE/sizeof(ulong)], irq_stack); + +static void init_irq_stacks(void) +{ + int cpu; + + for_each_possible_cpu(cpu) + per_cpu(irq_stack_ptr, cpu) = per_cpu(irq_stack, cpu); +} +#endif /* CONFIG_VMAP_STACK */ +#else +static void init_irq_stacks(void) {} +#endif /* CONFIG_IRQ_STACKS */ + int arch_show_interrupts(struct seq_file *p, int prec) { show_ipi_stats(p, prec); @@ -36,6 +68,7 @@ int arch_show_interrupts(struct seq_file *p, int prec) void __init init_IRQ(void) { + init_irq_stacks(); irqchip_init(); if (!handle_arch_irq) panic("No interrupt controller found."); |