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 <a.motakis@xxxxxxxxxxxxxxxxxxxxxx>
---
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
--
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