x86: factor out irq initialization for x86_64

Provide apic_intr_init and smp_intr_init functions.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 28 insertions, 15 deletions

diff --git a/arch/x86/kernel/irqinit_64.c b/arch/x86/kernel/irqinit_64.c
index 1f26fd9ec4f4..18968a78ab3d 100644
--- a/arch/x86/kernel/irqinit_64.c
+++ b/arch/x86/kernel/irqinit_64.c
@@ -164,22 +164,8 @@ static void __init init_ISA_irqs (void)
 
 void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
 
-void __init native_init_IRQ(void)
+void __init smp_intr_init(void)
 {
-        int i;
-
-        init_ISA_irqs();
-        /*
-         * Cover the whole vector space, no vector can escape
-         * us. (some of these will be overridden and become
-         * 'special' SMP interrupts)
-         */
-        for (i = 0; i < (NR_VECTORS - FIRST_EXTERNAL_VECTOR); i++) {
-                int vector = FIRST_EXTERNAL_VECTOR + i;
-                if (vector != IA32_SYSCALL_VECTOR)
-                        set_intr_gate(vector, interrupt[i]);
-        }
-
 #ifdef CONFIG_SMP
         /*
          * The reschedule interrupt is a CPU-to-CPU reschedule-helper
@@ -207,6 +193,14 @@ void __init native_init_IRQ(void)
         /* Low priority IPI to cleanup after moving an irq */
         set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
 #endif
+}
+
+void __init apic_intr_init(void)
+{
+#ifdef CONFIG_SMP
+        smp_intr_init();
+#endif
+
         alloc_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
         alloc_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt);
 
@@ -216,6 +210,25 @@ void __init native_init_IRQ(void)
         /* IPI vectors for APIC spurious and error interrupts */
         alloc_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
         alloc_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
+}
+
+void __init native_init_IRQ(void)
+{
+        int i;
+
+        init_ISA_irqs();
+        /*
+         * Cover the whole vector space, no vector can escape
+         * us. (some of these will be overridden and become
+         * 'special' SMP interrupts)
+         */
+        for (i = 0; i < (NR_VECTORS - FIRST_EXTERNAL_VECTOR); i++) {
+                int vector = FIRST_EXTERNAL_VECTOR + i;
+                if (vector != IA32_SYSCALL_VECTOR)
+                        set_intr_gate(vector, interrupt[i]);
+        }
+
+        apic_intr_init();
 
         if (!acpi_ioapic)
                 setup_irq(2, &irq2);