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-rw-r--r--arch/x86_64/kernel/io_apic.c111
1 files changed, 50 insertions, 61 deletions
diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index 65d72189eb6..dd6580c66f6 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -47,6 +47,31 @@
#include <asm/msidef.h>
#include <asm/hypertransport.h>
+struct irq_cfg {
+ cpumask_t domain;
+ u8 vector;
+};
+
+/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
+struct irq_cfg irq_cfg[NR_IRQS] __read_mostly = {
+ [0] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 0 },
+ [1] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 1 },
+ [2] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 2 },
+ [3] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 3 },
+ [4] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 4 },
+ [5] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 5 },
+ [6] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 6 },
+ [7] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 7 },
+ [8] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 8 },
+ [9] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 9 },
+ [10] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 10 },
+ [11] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 11 },
+ [12] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 12 },
+ [13] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 13 },
+ [14] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 14 },
+ [15] = { .domain = CPU_MASK_ALL, .vector = FIRST_EXTERNAL_VECTOR + 15 },
+};
+
static int assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result);
#define __apicdebuginit __init
@@ -613,46 +638,6 @@ static int pin_2_irq(int idx, int apic, int pin)
return irq;
}
-
-/* irq_vectors is indexed by the sum of all RTEs in all I/O APICs. */
-static u8 irq_vector[NR_IRQS] __read_mostly = {
- [0] = FIRST_EXTERNAL_VECTOR + 0,
- [1] = FIRST_EXTERNAL_VECTOR + 1,
- [2] = FIRST_EXTERNAL_VECTOR + 2,
- [3] = FIRST_EXTERNAL_VECTOR + 3,
- [4] = FIRST_EXTERNAL_VECTOR + 4,
- [5] = FIRST_EXTERNAL_VECTOR + 5,
- [6] = FIRST_EXTERNAL_VECTOR + 6,
- [7] = FIRST_EXTERNAL_VECTOR + 7,
- [8] = FIRST_EXTERNAL_VECTOR + 8,
- [9] = FIRST_EXTERNAL_VECTOR + 9,
- [10] = FIRST_EXTERNAL_VECTOR + 10,
- [11] = FIRST_EXTERNAL_VECTOR + 11,
- [12] = FIRST_EXTERNAL_VECTOR + 12,
- [13] = FIRST_EXTERNAL_VECTOR + 13,
- [14] = FIRST_EXTERNAL_VECTOR + 14,
- [15] = FIRST_EXTERNAL_VECTOR + 15,
-};
-
-static cpumask_t irq_domain[NR_IRQS] __read_mostly = {
- [0] = CPU_MASK_ALL,
- [1] = CPU_MASK_ALL,
- [2] = CPU_MASK_ALL,
- [3] = CPU_MASK_ALL,
- [4] = CPU_MASK_ALL,
- [5] = CPU_MASK_ALL,
- [6] = CPU_MASK_ALL,
- [7] = CPU_MASK_ALL,
- [8] = CPU_MASK_ALL,
- [9] = CPU_MASK_ALL,
- [10] = CPU_MASK_ALL,
- [11] = CPU_MASK_ALL,
- [12] = CPU_MASK_ALL,
- [13] = CPU_MASK_ALL,
- [14] = CPU_MASK_ALL,
- [15] = CPU_MASK_ALL,
-};
-
static int __assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
{
/*
@@ -670,19 +655,21 @@ static int __assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
cpumask_t old_mask = CPU_MASK_NONE;
int old_vector = -1;
int cpu;
+ struct irq_cfg *cfg;
BUG_ON((unsigned)irq >= NR_IRQS);
+ cfg = &irq_cfg[irq];
/* Only try and allocate irqs on cpus that are present */
cpus_and(mask, mask, cpu_online_map);
- if (irq_vector[irq] > 0)
- old_vector = irq_vector[irq];
+ if (cfg->vector > 0)
+ old_vector = cfg->vector;
if (old_vector > 0) {
- cpus_and(*result, irq_domain[irq], mask);
+ cpus_and(*result, cfg->domain, mask);
if (!cpus_empty(*result))
return old_vector;
- cpus_and(old_mask, irq_domain[irq], cpu_online_map);
+ cpus_and(old_mask, cfg->domain, cpu_online_map);
}
for_each_cpu_mask(cpu, mask) {
@@ -716,8 +703,8 @@ next:
per_cpu(vector_irq, old_cpu)[old_vector] = -1;
for_each_cpu_mask(new_cpu, new_mask)
per_cpu(vector_irq, new_cpu)[vector] = irq;
- irq_vector[irq] = vector;
- irq_domain[irq] = domain;
+ cfg->vector = vector;
+ cfg->domain = domain;
cpus_and(*result, domain, mask);
return vector;
}
@@ -737,18 +724,21 @@ static int assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
static void __clear_irq_vector(int irq)
{
+ struct irq_cfg *cfg;
cpumask_t mask;
int cpu, vector;
- BUG_ON(!irq_vector[irq]);
+ BUG_ON((unsigned)irq >= NR_IRQS);
+ cfg = &irq_cfg[irq];
+ BUG_ON(!cfg->vector);
- vector = irq_vector[irq];
- cpus_and(mask, irq_domain[irq], cpu_online_map);
+ vector = cfg->vector;
+ cpus_and(mask, cfg->domain, cpu_online_map);
for_each_cpu_mask(cpu, mask)
per_cpu(vector_irq, cpu)[vector] = -1;
- irq_vector[irq] = 0;
- irq_domain[irq] = CPU_MASK_NONE;
+ cfg->vector = 0;
+ cfg->domain = CPU_MASK_NONE;
}
void __setup_vector_irq(int cpu)
@@ -759,9 +749,9 @@ void __setup_vector_irq(int cpu)
/* Mark the inuse vectors */
for (irq = 0; irq < NR_IRQS; ++irq) {
- if (!cpu_isset(cpu, irq_domain[irq]))
+ if (!cpu_isset(cpu, irq_cfg[irq].domain))
continue;
- vector = irq_vector[irq];
+ vector = irq_cfg[irq].vector;
per_cpu(vector_irq, cpu)[vector] = irq;
}
/* Mark the free vectors */
@@ -769,7 +759,7 @@ void __setup_vector_irq(int cpu)
irq = per_cpu(vector_irq, cpu)[vector];
if (irq < 0)
continue;
- if (!cpu_isset(cpu, irq_domain[irq]))
+ if (!cpu_isset(cpu, irq_cfg[irq].domain))
per_cpu(vector_irq, cpu)[vector] = -1;
}
}
@@ -1346,16 +1336,15 @@ static unsigned int startup_ioapic_irq(unsigned int irq)
static int ioapic_retrigger_irq(unsigned int irq)
{
+ struct irq_cfg *cfg = &irq_cfg[irq];
cpumask_t mask;
- unsigned vector;
unsigned long flags;
spin_lock_irqsave(&vector_lock, flags);
- vector = irq_vector[irq];
cpus_clear(mask);
- cpu_set(first_cpu(irq_domain[irq]), mask);
+ cpu_set(first_cpu(cfg->domain), mask);
- send_IPI_mask(mask, vector);
+ send_IPI_mask(mask, cfg->vector);
spin_unlock_irqrestore(&vector_lock, flags);
return 1;
@@ -1430,7 +1419,7 @@ static inline void init_IO_APIC_traps(void)
*/
for (irq = 0; irq < NR_IRQS ; irq++) {
int tmp = irq;
- if (IO_APIC_IRQ(tmp) && !irq_vector[tmp]) {
+ if (IO_APIC_IRQ(tmp) && !irq_cfg[tmp].vector) {
/*
* Hmm.. We don't have an entry for this,
* so default to an old-fashioned 8259
@@ -1816,7 +1805,7 @@ int create_irq(void)
for (new = (NR_IRQS - 1); new >= 0; new--) {
if (platform_legacy_irq(new))
continue;
- if (irq_vector[new] != 0)
+ if (irq_cfg[new].vector != 0)
continue;
vector = __assign_irq_vector(new, TARGET_CPUS, &mask);
if (likely(vector > 0))
@@ -2108,7 +2097,7 @@ void __init setup_ioapic_dest(void)
* when you have too many devices, because at that time only boot
* cpu is online.
*/
- if(!irq_vector[irq])
+ if (!irq_cfg[irq].vector)
setup_IO_APIC_irq(ioapic, pin, irq,
irq_trigger(irq_entry),
irq_polarity(irq_entry));
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-26 21:34:10 +0000