x86: make 32bit support per_cpu vector

so we can merge io_apic_32.c and io_apic_64.c

v2: Use cpu_online_map as target cpus for bigsmp, just like 64-bit is doing.

Also remove some unused TARGET_CPUS macro.

v3: need to check if desc is null in smp_irq_move_cleanup

also migration needs to reset vector too, so copy __target_IO_APIC_irq
from 64bit.

(the duplication will go away once the two files are unified.)

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 29 insertions, 12 deletions

diff --git a/arch/x86/kernel/irqinit_32.c b/arch/x86/kernel/irqinit_32.c
index ded09ac2642e..9092103a18eb 100644
--- a/arch/x86/kernel/irqinit_32.c
+++ b/arch/x86/kernel/irqinit_32.c
@@ -90,6 +90,27 @@ static struct irqaction irq2 = {
         .name = "cascade",
 };
 
+DEFINE_PER_CPU(vector_irq_t, vector_irq) = {
+        [0 ... IRQ0_VECTOR - 1] = -1,
+        [IRQ0_VECTOR] = 0,
+        [IRQ1_VECTOR] = 1,
+        [IRQ2_VECTOR] = 2,
+        [IRQ3_VECTOR] = 3,
+        [IRQ4_VECTOR] = 4,
+        [IRQ5_VECTOR] = 5,
+        [IRQ6_VECTOR] = 6,
+        [IRQ7_VECTOR] = 7,
+        [IRQ8_VECTOR] = 8,
+        [IRQ9_VECTOR] = 9,
+        [IRQ10_VECTOR] = 10,
+        [IRQ11_VECTOR] = 11,
+        [IRQ12_VECTOR] = 12,
+        [IRQ13_VECTOR] = 13,
+        [IRQ14_VECTOR] = 14,
+        [IRQ15_VECTOR] = 15,
+        [IRQ15_VECTOR + 1 ... NR_VECTORS - 1] = -1
+};
+
 /* Overridden in paravirt.c */
 void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
 
@@ -105,22 +126,14 @@ void __init native_init_IRQ(void)
          * 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 (i >= nr_irqs)
-                        break;
+        for (i =  FIRST_EXTERNAL_VECTOR; i < NR_VECTORS; i++) {
                 /* SYSCALL_VECTOR was reserved in trap_init. */
-                if (!test_bit(vector, used_vectors))
-                        set_intr_gate(vector, interrupt[i]);
+                if (i != SYSCALL_VECTOR)
+                        set_intr_gate(i, interrupt[i]);
         }
 
-#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_SMP)
-        /*
-         * IRQ0 must be given a fixed assignment and initialized,
-         * because it's used before the IO-APIC is set up.
-         */
-        set_intr_gate(FIRST_DEVICE_VECTOR, interrupt[0]);
 
+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_SMP)
         /*
          * The reschedule interrupt is a CPU-to-CPU reschedule-helper
          * IPI, driven by wakeup.
@@ -135,6 +148,9 @@ void __init native_init_IRQ(void)
 
         /* IPI for single call function */
         set_intr_gate(CALL_FUNCTION_SINGLE_VECTOR, call_function_single_interrupt);
+
+        /* Low priority IPI to cleanup after moving an irq */
+        set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
 #endif
 
 #ifdef CONFIG_X86_LOCAL_APIC
@@ -168,3 +184,4 @@ void __init native_init_IRQ(void)
 
         irq_ctx_init(smp_processor_id());
 }
+