x86, io_apic: Introduce set_affinity function pointer

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 <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

1 files changed, 7 insertions, 10 deletions

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index d4b045e018fb..d9ca3be9636c 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2369,9 +2369,10 @@ 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;
@@ -2570,8 +2571,7 @@ 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 */
 
@@ -2582,7 +2582,7 @@ 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,
 };
 
@@ -3694,10 +3694,7 @@ 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);
         }
 
 }