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x86: change FIRST_SYSTEM_VECTOR to a variable

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The SGI UV system needs several more system vectors than a vanilla
x86_64 system.  Rather than burden the other archs with extra system
vectors that they don't use, change FIRST_SYSTEM_VECTOR to a variable,
so that it can be dynamic.

Signed-off-by: Alan Mayer <ajm@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Alan Mayer 2008-04-15 15:36:56 -05:00 committed by Ingo Molnar
parent 1a331957ef
commit 305b92a232
6 changed files with 55 additions and 27 deletions
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14
arch/x86/kernel/apic_32.c
View File

@ -1351,13 +1351,13 @@ void __init smp_intr_init(void)
* The reschedule interrupt is a CPU-to-CPU reschedule-helper
* IPI, driven by wakeup.
*/
set_intr_gate(RESCHEDULE_VECTOR, reschedule_interrupt);
alloc_intr_gate(RESCHEDULE_VECTOR, reschedule_interrupt);
/* IPI for invalidation */
set_intr_gate(INVALIDATE_TLB_VECTOR, invalidate_interrupt);
alloc_intr_gate(INVALIDATE_TLB_VECTOR, invalidate_interrupt);
/* IPI for generic function call */
set_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);
alloc_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);
}
#endif
@ -1370,15 +1370,15 @@ void __init apic_intr_init(void)
smp_intr_init();
#endif
/* self generated IPI for local APIC timer */
set_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt);
alloc_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt);
/* IPI vectors for APIC spurious and error interrupts */
set_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
set_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
alloc_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
alloc_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
/* thermal monitor LVT interrupt */
#ifdef CONFIG_X86_MCE_P4THERMAL
set_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
alloc_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
#endif
}

30
arch/x86/kernel/i8259_64.c
View File

@ -493,33 +493,33 @@ void __init native_init_IRQ(void)
* The reschedule interrupt is a CPU-to-CPU reschedule-helper
* IPI, driven by wakeup.
*/
set_intr_gate(RESCHEDULE_VECTOR, reschedule_interrupt);
alloc_intr_gate(RESCHEDULE_VECTOR, reschedule_interrupt);
/* IPIs for invalidation */
set_intr_gate(INVALIDATE_TLB_VECTOR_START+0, invalidate_interrupt0);
set_intr_gate(INVALIDATE_TLB_VECTOR_START+1, invalidate_interrupt1);
set_intr_gate(INVALIDATE_TLB_VECTOR_START+2, invalidate_interrupt2);
set_intr_gate(INVALIDATE_TLB_VECTOR_START+3, invalidate_interrupt3);
set_intr_gate(INVALIDATE_TLB_VECTOR_START+4, invalidate_interrupt4);
set_intr_gate(INVALIDATE_TLB_VECTOR_START+5, invalidate_interrupt5);
set_intr_gate(INVALIDATE_TLB_VECTOR_START+6, invalidate_interrupt6);
set_intr_gate(INVALIDATE_TLB_VECTOR_START+7, invalidate_interrupt7);
alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+0, invalidate_interrupt0);
alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+1, invalidate_interrupt1);
alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+2, invalidate_interrupt2);
alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+3, invalidate_interrupt3);
alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+4, invalidate_interrupt4);
alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+5, invalidate_interrupt5);
alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+6, invalidate_interrupt6);
alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+7, invalidate_interrupt7);
/* IPI for generic function call */
set_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);
alloc_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);
/* Low priority IPI to cleanup after moving an irq */
set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
#endif
set_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
set_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt);
alloc_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
alloc_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt);
/* self generated IPI for local APIC timer */
set_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt);
alloc_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt);
/* IPI vectors for APIC spurious and error interrupts */
set_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
set_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
alloc_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
alloc_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
if (!acpi_ioapic)
setup_irq(2, &irq2);

8
arch/x86/kernel/io_apic_32.c
View File

@ -83,6 +83,10 @@ int mp_irq_entries;
static int disable_timer_pin_1 __initdata;
int first_system_vector = 0xfe;
char system_vectors[NR_VECTORS] = { [0 ... NR_VECTORS-1] = SYS_VECTOR_FREE};
/*
* Rough estimation of how many shared IRQs there are, can
* be changed anytime.
@ -1176,7 +1180,7 @@ static int __assign_irq_vector(int irq)
offset = current_offset;
next:
vector += 8;
if (vector >= FIRST_SYSTEM_VECTOR) {
if (vector >= first_system_vector) {
offset = (offset + 1) % 8;
vector = FIRST_DEVICE_VECTOR + offset;
}
@ -2269,7 +2273,7 @@ void __init setup_IO_APIC(void)
int i;
/* Reserve all the system vectors. */
for (i = FIRST_SYSTEM_VECTOR; i < NR_VECTORS; i++)
for (i = first_system_vector; i < NR_VECTORS; i++)
set_bit(i, used_vectors);
enable_IO_APIC();

6
arch/x86/kernel/io_apic_64.c
View File

@ -82,6 +82,10 @@ struct irq_cfg irq_cfg[NR_IRQS] __read_mostly = {
static int assign_irq_vector(int irq, cpumask_t mask);
int first_system_vector = 0xfe;
char system_vectors[NR_VECTORS] = { [0 ... NR_VECTORS-1] = SYS_VECTOR_FREE};
#define __apicdebuginit __init
int sis_apic_bug; /* not actually supported, dummy for compile */
@ -730,7 +734,7 @@ static int __assign_irq_vector(int irq, cpumask_t mask)
offset = current_offset;
next:
vector += 8;
if (vector >= FIRST_SYSTEM_VECTOR) {
if (vector >= first_system_vector) {
/* If we run out of vectors on large boxen, must share them. */
offset = (offset + 1) % 8;
vector = FIRST_DEVICE_VECTOR + offset;

22
include/asm-x86/desc.h
View File

@ -311,6 +311,28 @@ static inline void set_intr_gate(unsigned int n, void *addr)
_set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS);
}
#define SYS_VECTOR_FREE 0
#define SYS_VECTOR_ALLOCED 1
extern int first_system_vector;
extern char system_vectors[];
static inline void alloc_system_vector(int vector)
{
if (system_vectors[vector] == SYS_VECTOR_FREE) {
system_vectors[vector] = SYS_VECTOR_ALLOCED;
if (first_system_vector > vector)
first_system_vector = vector;
} else
BUG();
}
static inline void alloc_intr_gate(unsigned int n, void *addr)
{
alloc_system_vector(n);
set_intr_gate(n, addr);
}
/*
* This routine sets up an interrupt gate at directory privilege level 3.
*/

2
include/asm-x86/irq_vectors.h
View File

@ -96,8 +96,6 @@
# define FIRST_DEVICE_VECTOR (IRQ15_VECTOR + 2)
#endif
#define FIRST_SYSTEM_VECTOR 0xef
#define NR_VECTORS 256
#define FPU_IRQ 13