![Thomas Gleixner](/assets/img/avatar_default.png)
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>
42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
#ifndef _ASM_X86_IRQ_REMAPPING_H
|
|
#define _ASM_X86_IRQ_REMAPPING_H
|
|
|
|
#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 */
|