From mboxrd@z Thu Jan 1 00:00:00 1970 From: a.motakis@virtualopensystems.com (Antonios Motakis) Date: Mon, 28 Apr 2014 17:52:42 +0200 Subject: [RFC PATCH v5 02/11] ARM SMMU: Add capability IOMMU_CAP_DMA_EXEC In-Reply-To: <1398700371-20096-1-git-send-email-a.motakis@virtualopensystems.com> References: <1398700371-20096-1-git-send-email-a.motakis@virtualopensystems.com> Message-ID: <1398700371-20096-3-git-send-email-a.motakis@virtualopensystems.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The ARM SMMU can take an IOMMU_EXEC protection flag in addition to IOMMU_READ and IOMMU_WRITE. Expose this as an IOMMU capability. Signed-off-by: Antonios Motakis --- drivers/iommu/arm-smmu.c | 2 ++ include/linux/iommu.h | 5 +++-- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 1d9ab39..abf802f 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1509,6 +1509,8 @@ static int arm_smmu_domain_has_cap(struct iommu_domain *domain, if (smmu_domain->root_cfg.smmu->features & ARM_SMMU_FEAT_COHERENT_WALK) caps |= IOMMU_CAP_CACHE_COHERENCY; + caps |= IOMMU_CAP_DMA_EXEC; + return !!(cap & caps); } diff --git a/include/linux/iommu.h b/include/linux/iommu.h index b96a5b2..4f547f3 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -57,8 +57,9 @@ struct iommu_domain { struct iommu_domain_geometry geometry; }; -#define IOMMU_CAP_CACHE_COHERENCY 0x1 -#define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */ +#define IOMMU_CAP_CACHE_COHERENCY (1 << 0) +#define IOMMU_CAP_INTR_REMAP (1 << 1) /* isolates device intrs */ +#define IOMMU_CAP_DMA_EXEC (1 << 2) /* EXEC protection flag */ /* * Following constraints are specifc to FSL_PAMUV1: -- 1.8.3.2