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authorMitchel Humpherys <mitchelh@codeaurora.org>2017-01-06 16:28:08 +0300
committerWill Deacon <will.deacon@arm.com>2017-01-19 18:56:17 +0300
commit579b2a65d245c093d3e63845c320b9321f112b75 (patch)
treec07ed55edf7993bd0c648479c6307d31e35808dc /include/linux/iommu.h
parenta121103c922847ba5010819a3f250f1f7fc84ab8 (diff)
downloadlinux-579b2a65d245c093d3e63845c320b9321f112b75.tar.xz
iommu: add IOMMU_PRIV attribute
Add the IOMMU_PRIV attribute, which is used to indicate privileged mappings. Reviewed-by: Robin Murphy <robin.murphy@arm.com> Tested-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'include/linux/iommu.h')
-rw-r--r--include/linux/iommu.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 0ff5111f6959..69e2417a2965 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -31,6 +31,13 @@
#define IOMMU_CACHE (1 << 2) /* DMA cache coherency */
#define IOMMU_NOEXEC (1 << 3)
#define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells */
+/*
+ * This is to make the IOMMU API setup privileged
+ * mapppings accessible by the master only at higher
+ * privileged execution level and inaccessible at
+ * less privileged levels.
+ */
+#define IOMMU_PRIV (1 << 5)
struct iommu_ops;
struct iommu_group;