iommu: add capability IOMMU_CAP_NOEXEC

Some IOMMUs accept an IOMMU_NOEXEC protection flag in addition to
IOMMU_READ and IOMMU_WRITE. Expose this as an IOMMU capability.

Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Will Deacon <will.deacon@arm.com>

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 67d0d4e..e57f0b9 100644 (file)
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -67,6 +67,7 @@ enum iommu_cap {
        IOMMU_CAP_CACHE_COHERENCY,      /* IOMMU can enforce cache coherent DMA
                                           transactions */
        IOMMU_CAP_INTR_REMAP,           /* IOMMU supports interrupt isolation */
+       IOMMU_CAP_NOEXEC,               /* IOMMU_NOEXEC flag */
 };
 
 /*