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Commit 819508d3 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

x86, irq: Add data structure to keep AMD specific irq remapping information 



Add a data structure to store information the IOMMU driver
can use to get from a 'struct irq_cfg' to the remapping
entry.

Signed-off-by: default avatarJoerg Roedel <joro@8bytes.org>
Acked-by: default avatarSebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent 078e1ee2

arch/x86/include/asm/hw_irq.h

+11 −1
Original line number Diff line number Diff line
@@ -101,6 +101,7 @@ static inline void set_io_apic_irq_attr(struct io_apic_irq_attr *irq_attr, 
	irq_attr->polarity	= polarity;

}



/* Intel specific interrupt remapping information */

struct irq_2_iommu {

	struct intel_iommu *iommu;

	u16 irte_index;
@@ -108,6 +109,12 @@ struct irq_2_iommu { 
	u8  irte_mask;

};



/* AMD specific interrupt remapping information */

struct irq_2_irte {

	u16 devid; /* Device ID for IRTE table */

	u16 index; /* Index into IRTE table*/

};



/*

 * This is performance-critical, we want to do it O(1)

 *
@@ -120,7 +127,10 @@ struct irq_cfg { 
	u8			vector;

	u8			move_in_progress : 1;

#ifdef CONFIG_IRQ_REMAP

	union {

		struct irq_2_iommu irq_2_iommu;

		struct irq_2_irte  irq_2_irte;

	};

#endif

};