linux-kernel - [PATCH 2/5] iommu/arm-smmu: add IOMMU_CAP

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Date:   Wed, 19 Jul 2017 15:03:55 +0530
From:   Anup Patel <anup.patel@...adcom.com>
To:     Will Deacon <will.deacon@....com>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        Baptiste Reynal <b.reynal@...tualopensystems.com>,
        Alex Williamson <alex.williamson@...hat.com>
Cc:     Scott Branden <sbranden@...adcom.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux-foundation.org, kvm@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        Anup Patel <anup.patel@...adcom.com>
Subject: [PATCH 2/5] iommu/arm-smmu: add IOMMU_CAP_BYPASS to the ARM SMMU driver

The ARM SMMUv1 and SMMUv2 support bypassing transactions for
which domain is not configured. The patch adds corresponding
IOMMU capability to advertise this fact.

Signed-off-by: Anup Patel <anup.patel@...adcom.com>
---
 drivers/iommu/arm-smmu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index bc89b4d..08a9020 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1483,6 +1483,8 @@ static bool arm_smmu_capable(enum iommu_cap cap)
 		return true;
 	case IOMMU_CAP_NOEXEC:
 		return true;
+	case IOMMU_CAP_BYPASS:
+		return true;
 	default:
 		return false;
 	}
-- 
2.7.4