drivers/pci/intr_remapping.h

#include <linux/intel-iommu.h>

struct ioapic_scope {
	struct intel_iommu *iommu;
	unsigned int id;
	unsigned int bus;	/* PCI bus number */
	unsigned int devfn;	/* PCI devfn number */
};

#define IR_X2APIC_MODE(mode) (mode ? (1 << 11) : 0)