[v7 1/8] iommu: Add new member capability to struct irq_remap_ops

[Feng Wu <feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>]

This patch adds a new member capability to struct irq_remap_ops,
this new function ops can be used to check whether some
features are supported, such as VT-d Posted-Interrupts.

Signed-off-by: Feng Wu <feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Jiang Liu <jiang.liu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
---
 arch/x86/include/asm/irq_remapping.h | 4 ++++
 drivers/iommu/irq_remapping.h        | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h
index 78974fb..0953723 100644
--- a/arch/x86/include/asm/irq_remapping.h
+++ b/arch/x86/include/asm/irq_remapping.h
@@ -31,6 +31,10 @@ struct irq_alloc_info;
 
 #ifdef CONFIG_IRQ_REMAP
 
+enum irq_remap_cap {
+	IRQ_POSTING_CAP = 0,
+};
+
 extern void set_irq_remapping_broken(void);
 extern int irq_remapping_prepare(void);
 extern int irq_remapping_enable(void);
diff --git a/drivers/iommu/irq_remapping.h b/drivers/iommu/irq_remapping.h
index 91d5a11..b6ca30d 100644
--- a/drivers/iommu/irq_remapping.h
+++ b/drivers/iommu/irq_remapping.h
@@ -35,6 +35,9 @@ extern int no_x2apic_optout;
 extern int irq_remapping_enabled;
 
 struct irq_remap_ops {
+	/* The supported capabilities */
+	int capability;
+
 	/* Initializes hardware and makes it ready for remapping interrupts */
 	int  (*prepare)(void);
 
-- 
2.1.0