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x86, io_apic: Introduce eoi_ioapic_pin call-back

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This callback replaces the old __eoi_ioapic_pin function
which needs a special path for interrupt remapping.

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 12:44:50 +02:00
parent 7601384f91
commit da165322df
5 changed files with 25 additions and 14 deletions
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20
arch/x86/kernel/apic/io_apic.c
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@@ -310,7 +310,7 @@ static __attribute_const__ struct io_apic __iomem *io_apic_base(int idx)
+ (mpc_ioapic_addr(idx) & ~PAGE_MASK);
}
static inline void io_apic_eoi(unsigned int apic, unsigned int vector)
void io_apic_eoi(unsigned int apic, unsigned int vector)
{
struct io_apic __iomem *io_apic = io_apic_base(apic);
writel(vector, &io_apic->eoi);
@@ -557,19 +557,10 @@ static void unmask_ioapic_irq(struct irq_data *data)
* Otherwise, we simulate the EOI message manually by changing the trigger
* mode to edge and then back to level, with RTE being masked during this.
*/
static void __eoi_ioapic_pin(int apic, int pin, int vector, struct irq_cfg *cfg)
void native_eoi_ioapic_pin(int apic, int pin, int vector)
{
if (mpc_ioapic_ver(apic) >= 0x20) {
/*
* Intr-remapping uses pin number as the virtual vector
* in the RTE. Actual vector is programmed in
* intr-remapping table entry. Hence for the io-apic
* EOI we use the pin number.
*/
if (cfg && irq_remapped(cfg))
io_apic_eoi(apic, pin);
else
io_apic_eoi(apic, vector);
io_apic_eoi(apic, vector);
} else {
struct IO_APIC_route_entry entry, entry1;
@@ -597,7 +588,8 @@ void eoi_ioapic_irq(unsigned int irq, struct irq_cfg *cfg)
raw_spin_lock_irqsave(&ioapic_lock, flags);
for_each_irq_pin(entry, cfg->irq_2_pin)
__eoi_ioapic_pin(entry->apic, entry->pin, cfg->vector, cfg);
x86_io_apic_ops.eoi_ioapic_pin(entry->apic, entry->pin,
cfg->vector);
raw_spin_unlock_irqrestore(&ioapic_lock, flags);
}
@@ -634,7 +626,7 @@ static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin)
}
raw_spin_lock_irqsave(&ioapic_lock, flags);
__eoi_ioapic_pin(apic, pin, entry.vector, NULL);
x86_io_apic_ops.eoi_ioapic_pin(apic, pin, entry.vector);
raw_spin_unlock_irqrestore(&ioapic_lock, flags);
}