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x86, io_apic: Convert setup_ioapic_entry to function pointer 

This pointer is changed to a different function when IRQ
remapping is enabled.

Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Joerg Roedel 2012-09-26 12:44:40 +02:00
parent 373dd7a27f
commit a6a25dd327
5 changed files with 17 additions and 9 deletions
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5
arch/x86/include/asm/io_apic.h
View File

@ -149,6 +149,10 @@ extern int io_apic_set_pci_routing(struct device *dev, int irq,
void setup_IO_APIC_irq_extra(u32 gsi);
extern void ioapic_insert_resources(void);
extern int native_setup_ioapic_entry(int, struct IO_APIC_route_entry *,
unsigned int, int,
struct io_apic_irq_attr *);
int io_apic_setup_irq_pin_once(unsigned int irq, int node, struct io_apic_irq_attr *attr);
extern int save_ioapic_entries(void);
@ -232,6 +236,7 @@ static inline void disable_ioapic_support(void) { }
#define native_disable_io_apic NULL
#define native_io_apic_print_entries NULL
#define native_ioapic_set_affinity NULL
#define native_setup_ioapic_entry NULL
#endif
#endif /* _ASM_X86_IO_APIC_H */

5
arch/x86/include/asm/x86_init.h
View File

@ -190,6 +190,8 @@ struct x86_msi_ops {
int (*setup_hpet_msi)(unsigned int irq, unsigned int id);
};
struct IO_APIC_route_entry;
struct io_apic_irq_attr;
struct irq_data;
struct cpumask;
@ -203,6 +205,9 @@ struct x86_io_apic_ops {
int (*set_affinity)(struct irq_data *data,
const struct cpumask *mask,
bool force);
int (*setup_entry)(int irq, struct IO_APIC_route_entry *entry,
unsigned int destination, int vector,
struct io_apic_irq_attr *attr);
};
extern struct x86_init_ops x86_init;

14
arch/x86/kernel/apic/io_apic.c
View File

@ -1315,14 +1315,10 @@ static void ioapic_register_intr(unsigned int irq, struct irq_cfg *cfg,
fasteoi ? "fasteoi" : "edge");
}
static int setup_ioapic_entry(int irq, struct IO_APIC_route_entry *entry,
unsigned int destination, int vector,
struct io_apic_irq_attr *attr)
int native_setup_ioapic_entry(int irq, struct IO_APIC_route_entry *entry,
unsigned int destination, int vector,
struct io_apic_irq_attr *attr)
{
if (irq_remapping_enabled)
return setup_ioapic_remapped_entry(irq, entry, destination,
vector, attr);
memset(entry, 0, sizeof(*entry));
entry->delivery_mode = apic->irq_delivery_mode;
@ -1370,8 +1366,8 @@ static void setup_ioapic_irq(unsigned int irq, struct irq_cfg *cfg,
attr->ioapic, mpc_ioapic_id(attr->ioapic), attr->ioapic_pin,
cfg->vector, irq, attr->trigger, attr->polarity, dest);
if (setup_ioapic_entry(irq, &entry, dest, cfg->vector, attr)) {
pr_warn("Failed to setup ioapic entry for ioapic %d, pin %d\n",
if (x86_io_apic_ops.setup_entry(irq, &entry, dest, cfg->vector, attr)) {
pr_warn("Failed to setup ioapic entry for ioapic %d, pin %d\n",
mpc_ioapic_id(attr->ioapic), attr->ioapic_pin);
__clear_irq_vector(irq, cfg);

1
arch/x86/kernel/x86_init.c
View File

@ -127,4 +127,5 @@ struct x86_io_apic_ops x86_io_apic_ops = {
.disable = native_disable_io_apic,
.print_entries = native_io_apic_print_entries,
.set_affinity = native_ioapic_set_affinity,
.setup_entry = native_setup_ioapic_entry,
};

1
drivers/iommu/irq_remapping.c
View File

@ -146,6 +146,7 @@ static void __init irq_remapping_modify_x86_ops(void)
{
x86_io_apic_ops.disable = irq_remapping_disable_io_apic;
x86_io_apic_ops.set_affinity = set_remapped_irq_affinity;
x86_io_apic_ops.setup_entry = setup_ioapic_remapped_entry;
x86_msi.setup_msi_irqs = irq_remapping_setup_msi_irqs;
x86_msi.setup_hpet_msi = setup_hpet_msi_remapped;
}