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-rw-r--r--arch/x86/include/asm/hw_irq.h3
-rw-r--r--arch/x86/include/asm/irq_vectors.h6
-rw-r--r--arch/x86/kernel/apic/apic.c22
-rw-r--r--arch/x86/kernel/entry_32.S4
-rw-r--r--arch/x86/kernel/entry_64.S4
-rw-r--r--arch/x86/kernel/irqinit.c13
-rw-r--r--arch/x86/lguest/boot.c2
7 files changed, 34 insertions, 20 deletions
diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index fa5d1e768ba3..8dbe237bd806 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -189,7 +189,8 @@ extern __visible void smp_call_function_single_interrupt(struct pt_regs *);
extern __visible void smp_invalidate_interrupt(struct pt_regs *);
#endif
-extern void (*__initconst interrupt[NR_VECTORS-FIRST_EXTERNAL_VECTOR])(void);
+extern void (*__initconst interrupt[FIRST_SYSTEM_VECTOR
+ - FIRST_EXTERNAL_VECTOR])(void);
#ifdef CONFIG_TRACING
#define trace_interrupt interrupt
#endif
diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors.h
index 5702d7e3111d..666c89ec4bd7 100644
--- a/arch/x86/include/asm/irq_vectors.h
+++ b/arch/x86/include/asm/irq_vectors.h
@@ -126,6 +126,12 @@
#define NR_VECTORS 256
+#ifdef CONFIG_X86_LOCAL_APIC
+#define FIRST_SYSTEM_VECTOR LOCAL_TIMER_VECTOR
+#else
+#define FIRST_SYSTEM_VECTOR NR_VECTORS
+#endif
+
#define FPU_IRQ 13
#define FIRST_VM86_IRQ 3
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index ba6cc041edb1..29b5b18afa27 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -196,7 +196,7 @@ static int disable_apic_timer __initdata;
int local_apic_timer_c2_ok;
EXPORT_SYMBOL_GPL(local_apic_timer_c2_ok);
-int first_system_vector = 0xfe;
+int first_system_vector = FIRST_SYSTEM_VECTOR;
/*
* Debug level, exported for io_apic.c
@@ -1930,7 +1930,7 @@ int __init APIC_init_uniprocessor(void)
/*
* This interrupt should _never_ happen with our APIC/SMP architecture
*/
-static inline void __smp_spurious_interrupt(void)
+static inline void __smp_spurious_interrupt(u8 vector)
{
u32 v;
@@ -1939,30 +1939,32 @@ static inline void __smp_spurious_interrupt(void)
* if it is a vectored one. Just in case...
* Spurious interrupts should not be ACKed.
*/
- v = apic_read(APIC_ISR + ((SPURIOUS_APIC_VECTOR & ~0x1f) >> 1));
- if (v & (1 << (SPURIOUS_APIC_VECTOR & 0x1f)))
+ v = apic_read(APIC_ISR + ((vector & ~0x1f) >> 1));
+ if (v & (1 << (vector & 0x1f)))
ack_APIC_irq();
inc_irq_stat(irq_spurious_count);
/* see sw-dev-man vol 3, chapter 7.4.13.5 */
- pr_info("spurious APIC interrupt on CPU#%d, "
- "should never happen.\n", smp_processor_id());
+ pr_info("spurious APIC interrupt through vector %02x on CPU#%d, "
+ "should never happen.\n", vector, smp_processor_id());
}
__visible void smp_spurious_interrupt(struct pt_regs *regs)
{
entering_irq();
- __smp_spurious_interrupt();
+ __smp_spurious_interrupt(~regs->orig_ax);
exiting_irq();
}
__visible void smp_trace_spurious_interrupt(struct pt_regs *regs)
{
+ u8 vector = ~regs->orig_ax;
+
entering_irq();
- trace_spurious_apic_entry(SPURIOUS_APIC_VECTOR);
- __smp_spurious_interrupt();
- trace_spurious_apic_exit(SPURIOUS_APIC_VECTOR);
+ trace_spurious_apic_entry(vector);
+ __smp_spurious_interrupt(vector);
+ trace_spurious_apic_exit(vector);
exiting_irq();
}
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 344b63f18d14..1ea4488bbb90 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -732,10 +732,10 @@ ENTRY(interrupt)
ENTRY(irq_entries_start)
RING0_INT_FRAME
vector=FIRST_EXTERNAL_VECTOR
-.rept (NR_VECTORS-FIRST_EXTERNAL_VECTOR+6)/7
+.rept (FIRST_SYSTEM_VECTOR-FIRST_EXTERNAL_VECTOR+6)/7
.balign 32
.rept 7
- .if vector < NR_VECTORS
+ .if vector < FIRST_SYSTEM_VECTOR
.if vector <> FIRST_EXTERNAL_VECTOR
CFI_ADJUST_CFA_OFFSET -4
.endif
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index c0226ab54106..e61c14aa1ef9 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -712,10 +712,10 @@ ENTRY(interrupt)
ENTRY(irq_entries_start)
INTR_FRAME
vector=FIRST_EXTERNAL_VECTOR
-.rept (NR_VECTORS-FIRST_EXTERNAL_VECTOR+6)/7
+.rept (FIRST_SYSTEM_VECTOR-FIRST_EXTERNAL_VECTOR+6)/7
.balign 32
.rept 7
- .if vector < NR_VECTORS
+ .if vector < FIRST_SYSTEM_VECTOR
.if vector <> FIRST_EXTERNAL_VECTOR
CFI_ADJUST_CFA_OFFSET -8
.endif
diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c
index 4de73ee78361..fa893087fb51 100644
--- a/arch/x86/kernel/irqinit.c
+++ b/arch/x86/kernel/irqinit.c
@@ -124,7 +124,6 @@ void setup_vector_irq(int cpu)
static void __init smp_intr_init(void)
{
#ifdef CONFIG_SMP
-#if defined(CONFIG_X86_64) || defined(CONFIG_X86_LOCAL_APIC)
/*
* The reschedule interrupt is a CPU-to-CPU reschedule-helper
* IPI, driven by wakeup.
@@ -144,7 +143,6 @@ static void __init smp_intr_init(void)
/* IPI used for rebooting/stopping */
alloc_intr_gate(REBOOT_VECTOR, reboot_interrupt);
-#endif
#endif /* CONFIG_SMP */
}
@@ -159,7 +157,7 @@ static void __init apic_intr_init(void)
alloc_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt);
#endif
-#if defined(CONFIG_X86_64) || defined(CONFIG_X86_LOCAL_APIC)
+#ifdef CONFIG_X86_LOCAL_APIC
/* self generated IPI for local APIC timer */
alloc_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt);
@@ -197,10 +195,17 @@ void __init native_init_IRQ(void)
* 'special' SMP interrupts)
*/
i = FIRST_EXTERNAL_VECTOR;
- for_each_clear_bit_from(i, used_vectors, NR_VECTORS) {
+#ifndef CONFIG_X86_LOCAL_APIC
+#define first_system_vector NR_VECTORS
+#endif
+ for_each_clear_bit_from(i, used_vectors, first_system_vector) {
/* IA32_SYSCALL_VECTOR could be used in trap_init already. */
set_intr_gate(i, interrupt[i - FIRST_EXTERNAL_VECTOR]);
}
+#ifdef CONFIG_X86_LOCAL_APIC
+ for_each_clear_bit_from(i, used_vectors, NR_VECTORS)
+ set_intr_gate(i, spurious_interrupt);
+#endif
if (!acpi_ioapic && !of_ioapic && nr_legacy_irqs())
setup_irq(2, &irq2);
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index aae94132bc24..c1c1544b8485 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -841,7 +841,7 @@ static void __init lguest_init_IRQ(void)
{
unsigned int i;
- for (i = FIRST_EXTERNAL_VECTOR; i < NR_VECTORS; i++) {
+ for (i = FIRST_EXTERNAL_VECTOR; i < FIRST_SYSTEM_VECTOR; i++) {
/* Some systems map "vectors" to interrupts weirdly. Not us! */
__this_cpu_write(vector_irq[i], i - FIRST_EXTERNAL_VECTOR);
if (i != SYSCALL_VECTOR)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 13:42:46 +0100