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1#ifndef _ASM_X86_IRQ_REMAPPING_H
2#define _ASM_X86_IRQ_REMAPPING_H
3
4#define IRTE_DEST(dest) ((x2apic_mode) ? dest : dest << 8)
5
6#ifdef CONFIG_INTR_REMAP
7static inline void prepare_irte(struct irte *irte, int vector,
8 unsigned int dest)
9{
10 memset(irte, 0, sizeof(*irte));
11
12 irte->present = 1;
13 irte->dst_mode = apic->irq_dest_mode;
14 /*
15 * Trigger mode in the IRTE will always be edge, and for IO-APIC, the
16 * actual level or edge trigger will be setup in the IO-APIC
17 * RTE. This will help simplify level triggered irq migration.
18 * For more details, see the comments (in io_apic.c) explainig IO-APIC
19 * irq migration in the presence of interrupt-remapping.
20 */
21 irte->trigger_mode = 0;
22 irte->dlvry_mode = apic->irq_delivery_mode;
23 irte->vector = vector;
24 irte->dest_id = IRTE_DEST(dest);
25 irte->redir_hint = 1;
26}
27static inline bool irq_remapped(struct irq_cfg *cfg)
28{
29 return cfg->irq_2_iommu.iommu != NULL;
30}
31#else
32static void prepare_irte(struct irte *irte, int vector, unsigned int dest)
33{
34}
35static inline bool irq_remapped(struct irq_cfg *cfg)
36{
37 return false;
38}
39#endif
40
41#endif /* _ASM_X86_IRQ_REMAPPING_H */