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Subject[PATCH 08/19] x86, io_apic: Convert setup_ioapic_entry to function pointer
Date
This pointer is changed to a different function when IRQ
remapping is enabled.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/include/asm/io_apic.h | 5 +++++
arch/x86/include/asm/x86_init.h | 5 +++++
arch/x86/kernel/apic/io_apic.c | 14 +++++---------
arch/x86/kernel/x86_init.c | 1 +
drivers/iommu/irq_remapping.c | 1 +
5 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index a744cbb..71f5f08 100644
--- a/arch/x86/include/asm/io_apic.h
+++ b/arch/x86/include/asm/io_apic.h
@@ -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 */
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index f5f712b..bc13022 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -189,6 +189,8 @@ 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;

@@ -202,6 +204,9 @@ 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;
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index fb91d1a..5d372be 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1319,14 +1319,10 @@ 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;
@@ -1374,8 +1370,8 @@ 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);

diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index 8806d0b..3cd6bf7 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -129,4 +129,5 @@ 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,
};
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index ccf87e5..5b28e28 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -91,6 +91,7 @@ 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;
}
--
1.7.9.5



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