linux-kernel - [RFC 11/11] iommu/arm-smmu: Advertise IOMMU_CAP_TRANSLATE

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Message-Id: <1475009318-2617-12-git-send-email-eric.auger@redhat.com>
Date:   Tue, 27 Sep 2016 20:48:38 +0000
From:   Eric Auger <eric.auger@...hat.com>
To:     eric.auger@...hat.com, eric.auger.pro@...il.com,
        christoffer.dall@...aro.org, marc.zyngier@....com,
        robin.murphy@....com, alex.williamson@...hat.com,
        will.deacon@....com, joro@...tes.org, tglx@...utronix.de,
        jason@...edaemon.net, linux-arm-kernel@...ts.infradead.org
Cc:     kvm@...r.kernel.org, drjones@...hat.com,
        linux-kernel@...r.kernel.org, Bharat.Bhushan@...escale.com,
        pranav.sawargaonkar@...il.com, p.fedin@...sung.com,
        iommu@...ts.linux-foundation.org, Jean-Philippe.Brucker@....com,
        yehuday@...vell.com, Manish.Jaggi@...iumnetworks.com
Subject: [RFC 11/11] iommu/arm-smmu: Advertise IOMMU_CAP_TRANSLATE_MSI

arm-smmu and arm-smmu-v3 do translate MSI write transactions
emitted by downstream devices. Advertise this property through
the capable operation.

Signed-off-by: Eric Auger <eric.auger@...hat.com>
---
 drivers/iommu/arm-smmu-v3.c | 2 ++
 drivers/iommu/arm-smmu.c    | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index c86ba84..431ba8c 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -1375,6 +1375,8 @@ static bool arm_smmu_capable(enum iommu_cap cap)
 		return false;
 	case IOMMU_CAP_NOEXEC:
 		return true;
+	case IOMMU_CAP_TRANSLATE_MSI:
+		return true;
 	default:
 		return false;
 	}
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 7af1dd0..b862a1c 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1363,6 +1363,8 @@ static bool arm_smmu_capable(enum iommu_cap cap)
 		return false;
 	case IOMMU_CAP_NOEXEC:
 		return true;
+	case IOMMU_CAP_TRANSLATE_MSI:
+		return true;
 	default:
 		return false;
 	}
-- 
1.9.1