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authorYinghai Lu <yhlu.kernel@gmail.com>2008-08-19 20:50:28 -0700
committerIngo Molnar <mingo@elte.hu>2008-10-16 16:52:53 +0200
commit497c9a195db918d3f035e8cb3021e5d4d035516e (patch)
tree73df8764a812f2d6d2bd81d6a1d671008a0d212b /arch/x86/kernel/irqinit_32.c
parent199751d715bba5b469ea22adadc68a4166bfa4f5 (diff)
downloadlinux-2.6.38-lt-ux500-497c9a195db918d3f035e8cb3021e5d4d035516e.tar.gz
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>
Diffstat (limited to 'arch/x86/kernel/irqinit_32.c')
-rw-r--r--arch/x86/kernel/irqinit_32.c41
1 files changed, 29 insertions, 12 deletions
diff --git a/arch/x86/kernel/irqinit_32.c b/arch/x86/kernel/irqinit_32.c
index ded09ac2642..9092103a18e 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());
}
+