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Subject[PATCH 07/19] x86, io_apic: Introduce set_affinity function pointer
Date
With interrupt remapping a special function is used to
change the affinity of an IO-APIC interrupt. Abstract this
with a function pointer.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/include/asm/io_apic.h | 4 ++++
arch/x86/include/asm/irq_remapping.h | 9 ---------
arch/x86/include/asm/x86_init.h | 6 ++++++
arch/x86/kernel/apic/io_apic.c | 17 +++++++----------
arch/x86/kernel/x86_init.c | 1 +
drivers/iommu/irq_remapping.c | 4 ++++
6 files changed, 22 insertions(+), 19 deletions(-)

diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index 21aa81e..a744cbb 100644
--- a/arch/x86/include/asm/io_apic.h
+++ b/arch/x86/include/asm/io_apic.h
@@ -182,6 +182,9 @@ extern void native_io_apic_modify(unsigned int apic, unsigned int reg, unsigned
extern void native_disable_io_apic(void);
extern void native_io_apic_print_entries(unsigned int apic, unsigned int nr_entries);
extern void intel_ir_io_apic_print_entries(unsigned int apic, unsigned int nr_entries);
+extern int native_ioapic_set_affinity(struct irq_data *,
+ const struct cpumask *,
+ bool);

static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
{
@@ -228,6 +231,7 @@ static inline void disable_ioapic_support(void) { }
#define native_io_apic_modify NULL
#define native_disable_io_apic NULL
#define native_io_apic_print_entries NULL
+#define native_ioapic_set_affinity NULL
#endif

#endif /* _ASM_X86_IO_APIC_H */
diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h
index 0ee1e88..f1afa04 100644
--- a/arch/x86/include/asm/irq_remapping.h
+++ b/arch/x86/include/asm/irq_remapping.h
@@ -40,9 +40,6 @@ extern int setup_ioapic_remapped_entry(int irq,
unsigned int destination,
int vector,
struct io_apic_irq_attr *attr);
-extern int set_remapped_irq_affinity(struct irq_data *data,
- const struct cpumask *mask,
- bool force);
extern void free_remapped_irq(int irq);
extern void compose_remapped_msi_msg(struct pci_dev *pdev,
unsigned int irq, unsigned int dest,
@@ -68,12 +65,6 @@ static inline int setup_ioapic_remapped_entry(int irq,
{
return -ENODEV;
}
-static inline int set_remapped_irq_affinity(struct irq_data *data,
- const struct cpumask *mask,
- bool force)
-{
- return 0;
-}
static inline void free_remapped_irq(int irq) { }
static inline void compose_remapped_msi_msg(struct pci_dev *pdev,
unsigned int irq, unsigned int dest,
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index 1f49c8a..f5f712b 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -189,6 +189,9 @@ struct x86_msi_ops {
int (*setup_hpet_msi)(unsigned int irq, unsigned int id);
};

+struct irq_data;
+struct cpumask;
+
struct x86_io_apic_ops {
void (*init) (void);
unsigned int (*read) (unsigned int apic, unsigned int reg);
@@ -196,6 +199,9 @@ struct x86_io_apic_ops {
void (*modify) (unsigned int apic, unsigned int reg, unsigned int value);
void (*disable)(void);
void (*print_entries)(unsigned int apic, unsigned int nr_entries);
+ int (*set_affinity)(struct irq_data *data,
+ const struct cpumask *mask,
+ bool force);
};

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 811e930..fb91d1a 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2368,9 +2368,10 @@ int __ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask,
return 0;
}

-static int
-ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask,
- bool force)
+
+int native_ioapic_set_affinity(struct irq_data *data,
+ const struct cpumask *mask,
+ bool force)
{
unsigned int dest, irq = data->irq;
unsigned long flags;
@@ -2569,8 +2570,7 @@ static void irq_remap_modify_chip_defaults(struct irq_chip *chip)
chip->irq_print_chip = ir_print_prefix;
chip->irq_ack = ir_ack_apic_edge;
chip->irq_eoi = ir_ack_apic_level;
-
- chip->irq_set_affinity = set_remapped_irq_affinity;
+ chip->irq_set_affinity = x86_io_apic_ops.set_affinity;
}
#endif /* CONFIG_IRQ_REMAP */

@@ -2581,7 +2581,7 @@ static struct irq_chip ioapic_chip __read_mostly = {
.irq_unmask = unmask_ioapic_irq,
.irq_ack = ack_apic_edge,
.irq_eoi = ack_apic_level,
- .irq_set_affinity = ioapic_set_affinity,
+ .irq_set_affinity = native_ioapic_set_affinity,
.irq_retrigger = ioapic_retrigger_irq,
};

@@ -3656,10 +3656,7 @@ void __init setup_ioapic_dest(void)
else
mask = apic->target_cpus();

- if (irq_remapping_enabled)
- set_remapped_irq_affinity(idata, mask, false);
- else
- ioapic_set_affinity(idata, mask, false);
+ x86_io_apic_ops.set_affinity(idata, mask, false);
}

}
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index 339e108..8806d0b 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -128,4 +128,5 @@ struct x86_io_apic_ops x86_io_apic_ops = {
.modify = native_io_apic_modify,
.disable = native_disable_io_apic,
.print_entries = native_io_apic_print_entries,
+ .set_affinity = native_ioapic_set_affinity,
};
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index 984104b..ccf87e5 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -26,6 +26,9 @@ static struct irq_remap_ops *remap_ops;
static int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec);
static int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
int index, int sub_handle);
+static int set_remapped_irq_affinity(struct irq_data *data,
+ const struct cpumask *mask,
+ bool force);

static void irq_remapping_disable_io_apic(void)
{
@@ -87,6 +90,7 @@ error:
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_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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