arch: initialize irq_offload during boot, do not use SYS_INIT

Do not use SYS_INIT for initializing irq_offload when enabled, instead
using a new interface that is called during the boot process for all
architectures.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

arch/arc/core/irq_offload.c

@@ -54,7 +54,7 @@ void arch_irq_offload(irq_offload_routine_t routine, const void *parameter)
 }
 
 /* need to be executed on every core in the system */
-int arc_irq_offload_init(void)
+void arch_irq_offload_init(void)
 {
 
 	IRQ_CONNECT(IRQ_OFFLOAD_LINE, IRQ_OFFLOAD_PRIO, arc_irq_offload_handler, NULL, 0);
@@ -64,8 +64,4 @@ int arc_irq_offload_init(void)
 	 * with generic irq_enable() but via z_arc_v2_irq_unit_int_enable().
 	 */
 	z_arc_v2_irq_unit_int_enable(IRQ_OFFLOAD_LINE);
-
-	return 0;
 }
-
-SYS_INIT(arc_irq_offload_init, POST_KERNEL, 0);

arch/arc/include/arc_irq_offload.h

@@ -9,11 +9,9 @@
 
 #ifdef CONFIG_IRQ_OFFLOAD
 
-int arc_irq_offload_init(const struct device *unused);
-
 static inline void arc_irq_offload_init_smp(void)
 {
-	arc_irq_offload_init(NULL);
+	arch_irq_offload_init();
 }
 
 #else

arch/arm/core/irq_offload.c

@@ -42,3 +42,7 @@ void arch_irq_offload(irq_offload_routine_t routine, const void *parameter)
 	offload_routine = NULL;
 	k_sched_unlock();
 }
+
+void arch_irq_offload_init(void)
+{
+}

arch/arm64/core/irq_offload.c

@@ -23,3 +23,7 @@ void arch_irq_offload(irq_offload_routine_t routine, const void *parameter)
 			  : [svid] "i" (_SVC_CALL_IRQ_OFFLOAD),
 			    "r" (x0), "r" (x1));
 }
+
+void arch_irq_offload_init(void)
+{
+}

arch/mips/core/irq_offload.c

@@ -48,3 +48,7 @@ void arch_irq_offload(irq_offload_routine_t routine, const void *parameter)
 
 	irq_unlock(key);
 }
+
+void arch_irq_offload_init(void)
+{
+}

arch/nios2/core/irq_offload.c

@@ -41,3 +41,7 @@ void arch_irq_offload(irq_offload_routine_t routine, const void *parameter)
 
 	irq_unlock(key);
 }
+
+void arch_irq_offload_init(void)
+{
+}

arch/posix/core/irq.c

@@ -14,6 +14,10 @@ void arch_irq_offload(irq_offload_routine_t routine, const void *parameter)
 {
 	posix_irq_offload(routine, parameter);
 }
+
+void arch_irq_offload_init(void)
+{
+}
 #endif
 
 void arch_irq_enable(unsigned int irq)

arch/riscv/core/irq_offload.c

@@ -11,3 +11,7 @@ void arch_irq_offload(irq_offload_routine_t routine, const void *parameter)
 {
 	arch_syscall_invoke2((uintptr_t)routine, (uintptr_t)parameter, RV_ECALL_IRQ_OFFLOAD);
 }
+
+void arch_irq_offload_init(void)
+{
+}

arch/sparc/core/irq_offload.c

@@ -39,3 +39,7 @@ void arch_irq_offload(irq_offload_routine_t routine, const void *parameter)
 
 	irq_unlock(key);
 }
+
+void arch_irq_offload_init(void)
+{
+}

arch/x86/core/ia32/irq_offload.c

@@ -47,3 +47,7 @@ void arch_irq_offload(irq_offload_routine_t routine, const void *parameter)
 
 	irq_unlock(key);
 }
+
+void arch_irq_offload_init(void)
+{
+}

arch/x86/core/intel64/irq_offload.c

@@ -44,11 +44,7 @@ void arch_irq_offload(irq_offload_routine_t routine, const void *parameter)
 	arch_irq_unlock(key);
 }
 
-int irq_offload_init(void)
+void arch_irq_offload_init(void)
 {
 	x86_irq_funcs[CONFIG_IRQ_OFFLOAD_VECTOR - IV_IRQS] = dispatcher;
-
-	return 0;
 }
-
-SYS_INIT(irq_offload_init, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);

arch/xtensa/core/irq_offload.c

@@ -37,3 +37,7 @@ void arch_irq_offload(irq_offload_routine_t routine, const void *parameter)
 			 :: "r"(intenable), "r"(BIT(ZSR_IRQ_OFFLOAD_INT)));
 	arch_irq_unlock(key);
 }
+
+void arch_irq_offload_init(void)
+{
+}

include/zephyr/arch/arch_interface.h

@@ -455,6 +455,13 @@ bool arch_irq_is_used(unsigned int irq);
  * @param parameter Value to pass to the function when invoked
  */
 void arch_irq_offload(irq_offload_routine_t routine, const void *parameter);
+
+
+/**
+ * Initialize the architecture-specific portion of the irq_offload subsystem
+ */
+void arch_irq_offload_init(void);
+
 #endif /* CONFIG_IRQ_OFFLOAD */
 
 /** @} */

kernel/init.c

@@ -516,6 +516,9 @@ static void bg_thread_main(void *unused1, void *unused2, void *unused3)
 #endif /* CONFIG_MMU */
 	z_sys_post_kernel = true;
 
+#if CONFIG_IRQ_OFFLOAD
+	arch_irq_offload_init();
+#endif
 	z_sys_init_run_level(INIT_LEVEL_POST_KERNEL);
 #if CONFIG_SOC_LATE_INIT_HOOK
 	soc_late_init_hook();