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iommu: add IOMMU_PRIV attribute

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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>
This commit is contained in:
Mitchel Humpherys 2017-01-06 18:58:08 +05:30 committed by Will Deacon
parent a121103c92
commit 579b2a65d2
1 changed files with 7 additions and 0 deletions
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7
include/linux/iommu.h
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@ -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;