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 <[email protected]> --- 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
