In subsequent patches we want to allow irqchip drivers to register as
FIQ handlers, with a set_handle_fiq() function. To keep the IRQ/FIQ
paths similar, we want arm64 to provide both set_handle_irq() and
set_handle_fiq(), rather than using GENERIC_IRQ_MULTI_HANDLER for the
former.
This patch adds an arm64-specific implementation of set_handle_irq().
There should be no functional change as a result of this patch.
Signed-off-by: Marc Zyngier <maz@kernel.org>
[Mark: use a single handler pointer]
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Hector Martin <marcan@marcan.st>
Cc: James Morse <james.morse@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210315115629.57191-3-mark.rutland@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
select GENERIC_EARLY_IOREMAP
select GENERIC_IDLE_POLL_SETUP
select GENERIC_IRQ_IPI
- select GENERIC_IRQ_MULTI_HANDLER
select GENERIC_IRQ_PROBE
select GENERIC_IRQ_SHOW
select GENERIC_IRQ_SHOW_LEVEL
struct pt_regs;
+int set_handle_irq(void (*handle_irq)(struct pt_regs *));
+#define set_handle_irq set_handle_irq
+
static inline int nr_legacy_irqs(void)
{
return 0;
}
#endif
+void (*handle_arch_irq)(struct pt_regs *) __ro_after_init;
+
+int __init set_handle_irq(void (*handle_irq)(struct pt_regs *))
+{
+ if (handle_arch_irq)
+ return -EBUSY;
+
+ handle_arch_irq = handle_irq;
+ return 0;
+}
+
void __init init_IRQ(void)
{
init_irq_stacks();