The interrupt initialization routine becomes native_init_IRQ and will
be overriden later in case paravirt is on.
The interrupt vector is made global, so paravirt guests can reference
it in their initializations. However, "interrupt" is such a common
name, and could lead to clashes, so it is renamed.
Signed-off-by: Glauber de Oliveira Costa <[EMAIL PROTECTED]>
Signed-off-by: Steven Rostedt <[EMAIL PROTECTED]>
---
arch/x86_64/kernel/i8259.c | 15 +++++++++++----
include/asm-x86_64/irq.h | 2 ++
2 files changed, 13 insertions(+), 4 deletions(-)
diff --git a/arch/x86_64/kernel/i8259.c b/arch/x86_64/kernel/i8259.c
index 948cae6..8dda872 100644
--- a/arch/x86_64/kernel/i8259.c
+++ b/arch/x86_64/kernel/i8259.c
@@ -75,8 +75,12 @@ BUILD_16_IRQS(0xc) BUILD_16_IRQS(0xd) BUILD_16_IRQS(0xe)
BUILD_16_IRQS(0xf)
IRQ(x,8), IRQ(x,9), IRQ(x,a), IRQ(x,b), \
IRQ(x,c), IRQ(x,d), IRQ(x,e), IRQ(x,f)
-/* for the irq vectors */
-static void (*interrupt[NR_VECTORS - FIRST_EXTERNAL_VECTOR])(void) = {
+/*
+ * For the irq vectors. It is global rather than static to allow for
+ * paravirtualized guests to use it in their own interrupt initialization
+ * routines
+ */
+void (*interrupt_vector[NR_VECTORS - FIRST_EXTERNAL_VECTOR])(void) = {
IRQLIST_16(0x2), IRQLIST_16(0x3),
IRQLIST_16(0x4), IRQLIST_16(0x5), IRQLIST_16(0x6), IRQLIST_16(0x7),
IRQLIST_16(0x8), IRQLIST_16(0x9), IRQLIST_16(0xa), IRQLIST_16(0xb),
@@ -484,7 +488,10 @@ static int __init init_timer_sysfs(void)
device_initcall(init_timer_sysfs);
-void __init init_IRQ(void)
+/* Overridden in paravirt.c */
+void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
+
+void __init native_init_IRQ(void)
{
int i;
@@ -497,7 +504,7 @@ void __init init_IRQ(void)
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]);
+ set_intr_gate(vector, interrupt_vector[i]);
}
#ifdef CONFIG_SMP
diff --git a/include/asm-x86_64/irq.h b/include/asm-x86_64/irq.h
index 5006c6e..be55299 100644
--- a/include/asm-x86_64/irq.h
+++ b/include/asm-x86_64/irq.h
@@ -46,6 +46,8 @@ static __inline__ int irq_canonicalize(int irq)
extern void fixup_irqs(cpumask_t map);
#endif
+void native_init_IRQ(void);
+
#define __ARCH_HAS_DO_SOFTIRQ 1
#endif /* _ASM_IRQ_H */
--
1.4.4.2
-
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