Merge branch 'ieee1394-removal' of git://git.kernel.org/pub/scm/linux/kernel/git...

[pandora-kernel.git] / arch / x86 / include / asm / irq_remapping.h

diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h
index f275e22..1c23360 100644 (file)
--- a/arch/x86/include/asm/irq_remapping.h
+++ b/arch/x86/include/asm/irq_remapping.h
@@ -3,4 +3,39 @@
 
 #define IRTE_DEST(dest) ((x2apic_mode) ? dest : dest << 8)
 
+#ifdef CONFIG_INTR_REMAP
+static inline void prepare_irte(struct irte *irte, int vector,
+                               unsigned int dest)
+{
+       memset(irte, 0, sizeof(*irte));
+
+       irte->present = 1;
+       irte->dst_mode = apic->irq_dest_mode;
+       /*
+        * Trigger mode in the IRTE will always be edge, and for IO-APIC, the
+        * actual level or edge trigger will be setup in the IO-APIC
+        * RTE. This will help simplify level triggered irq migration.
+        * For more details, see the comments (in io_apic.c) explainig IO-APIC
+        * irq migration in the presence of interrupt-remapping.
+       */
+       irte->trigger_mode = 0;
+       irte->dlvry_mode = apic->irq_delivery_mode;
+       irte->vector = vector;
+       irte->dest_id = IRTE_DEST(dest);
+       irte->redir_hint = 1;
+}
+static inline bool irq_remapped(struct irq_cfg *cfg)
+{
+       return cfg->irq_2_iommu.iommu != NULL;
+}
+#else
+static void prepare_irte(struct irte *irte, int vector, unsigned int dest)
+{
+}
+static inline bool irq_remapped(struct irq_cfg *cfg)
+{
+       return false;
+}
+#endif
+
 #endif /* _ASM_X86_IRQ_REMAPPING_H */