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

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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: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Joerg Roedel 2012-09-26 12:44:44 +02:00
parent 078e1ee26a
commit 819508d302
1 changed files with 11 additions and 1 deletions
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12
arch/x86/include/asm/hw_irq.h
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@ -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
struct irq_2_iommu irq_2_iommu;
union {
struct irq_2_iommu irq_2_iommu;
struct irq_2_irte irq_2_irte;
};
#endif
};