linux-kernel - [v4 1/8] iommu: Add new member capability to struct irq_remap

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Date:	Mon,  2 Feb 2015 16:06:57 +0800
From:	Feng Wu <feng.wu@...el.com>
To:	dwmw2@...radead.org, joro@...tes.org
Cc:	jiang.liu@...ux.intel.com, iommu@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, Feng Wu <feng.wu@...el.com>
Subject: [v4 1/8] iommu: Add new member capability to struct irq_remap_ops

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@...el.com>
Reviewed-by: Jiang Liu <jiang.liu@...ux.intel.com>
---
 arch/x86/include/asm/irq_remapping.h |    4 ++++
 drivers/iommu/irq_remapping.h        |    3 +++
 2 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h
index 6ba2431..f67ae08 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 setup_irq_remapping_ops(void);
 extern int irq_remapping_supported(void);
 extern void set_irq_remapping_broken(void);
diff --git a/drivers/iommu/irq_remapping.h b/drivers/iommu/irq_remapping.h
index 4bd791d..69b2a1c 100644
--- a/drivers/iommu/irq_remapping.h
+++ b/drivers/iommu/irq_remapping.h
@@ -36,6 +36,9 @@ extern int no_x2apic_optout;
 extern int irq_remapping_enabled;
 
 struct irq_remap_ops {
+	/* The supported capabilites */
+	int capability;
+
 	/* Check whether Interrupt Remapping is supported */
 	int (*supported)(void);
 
-- 
1.7.1

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