[PATCH 1/5] iommu: Add capability IOMMU_CAP_BYPASS

[Anup Patel]

Some of the IOMMUs (such as ARM SMMU) are capable of bypassing
transactions for which no IOMMU domain is configured.

This patch adds IOMMU_CAP_BYPASS which can be used by IOMMU
drivers to advertise transation bypass capability of an IOMMU.

Signed-off-by: Anup Patel <anup.patel@xxxxxxxxxxxx>
---
 include/linux/iommu.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 2cb54ad..6bbb4cc 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -101,6 +101,10 @@ enum iommu_cap {
 					   transactions */
 	IOMMU_CAP_INTR_REMAP,		/* IOMMU supports interrupt isolation */
 	IOMMU_CAP_NOEXEC,		/* IOMMU_NOEXEC flag */
+	IOMMU_CAP_BYPASS,		/*
+					 * IOMMU can bypass transactions for
+					 * which domain is not configured
+					 */
 };
 
 /*
-- 
2.7.4