x86: Speed up the irq_remapped check in hot pathes

irq_2_iommu is in struct irq_cfg, so we can do the irq_remapped check
based on irq_cfg instead of going through a lookup function. That's
especially interesting in the eoi_ioapic_irq() hotpath.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 6 insertions, 6 deletions

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 6ff6bb883c5..1b8e8a10612 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1237,7 +1237,7 @@ static void ioapic_register_intr(unsigned int irq, unsigned long trigger)
         else
                 irq_clear_status_flags(irq, IRQ_LEVEL);
 
-        if (irq_remapped(irq)) {
+        if (irq_remapped(get_irq_chip_data(irq))) {
                 irq_set_status_flags(irq, IRQ_MOVE_PCNTXT);
                 if (trigger)
                         set_irq_chip_and_handler_name(irq, &ir_ioapic_chip,
@@ -2183,7 +2183,7 @@ static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, struct irq
                  * With interrupt-remapping, destination information comes
                  * from interrupt-remapping table entry.
                  */
-                if (!irq_remapped(irq))
+                if (!irq_remapped(cfg))
                         io_apic_write(apic, 0x11 + pin*2, dest);
                 reg = io_apic_read(apic, 0x10 + pin*2);
                 reg &= ~IO_APIC_REDIR_VECTOR_MASK;
@@ -2415,7 +2415,7 @@ static void eoi_ioapic_irq(unsigned int irq, struct irq_cfg *cfg)
                          * intr-remapping table entry. Hence for the io-apic
                          * EOI we use the pin number.
                          */
-                        if (irq_remapped(irq))
+                        if (irq_remapped(cfg))
                                 io_apic_eoi(entry->apic, entry->pin);
                         else
                                 io_apic_eoi(entry->apic, cfg->vector);
@@ -3139,7 +3139,7 @@ static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq,
 
         dest = apic->cpu_mask_to_apicid_and(cfg->domain, apic->target_cpus());
 
-        if (irq_remapped(irq)) {
+        if (irq_remapped(get_irq_chip_data(irq))) {
                 struct irte irte;
                 int ir_index;
                 u16 sub_handle;
@@ -3321,7 +3321,7 @@ static int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int irq)
         set_irq_msi(irq, msidesc);
         write_msi_msg(irq, &msg);
 
-        if (irq_remapped(irq)) {
+        if (irq_remapped(get_irq_chip_data(irq))) {
                 irq_set_status_flags(irq, IRQ_MOVE_PCNTXT);
                 set_irq_chip_and_handler_name(irq, &msi_ir_chip, handle_edge_irq, "edge");
         } else
@@ -3522,7 +3522,7 @@ int arch_setup_hpet_msi(unsigned int irq, unsigned int id)
 
         hpet_msi_write(get_irq_data(irq), &msg);
         irq_set_status_flags(irq, IRQ_MOVE_PCNTXT);
-        if (irq_remapped(irq))
+        if (irq_remapped(get_irq_chip_data(irq)))
                 set_irq_chip_and_handler_name(irq, &ir_hpet_msi_type,
                                               handle_edge_irq, "edge");
         else