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: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index eb92a6e..fc89a2a 100644 (file)
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -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
 };