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iommu: Add client fault handler flag for external faults

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Some IOMMUs (like the ARM SMMU) can raise "external faults" in addition
to translation and permission faults.  Add an IOMMU fault flag so that
this fault type can be propagated to client fault handlers.

Change-Id: Ia476ed6c727f5f01011747f30b3a74ebf0fc07f7
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
This commit is contained in:
Mitchel Humpherys 2015-08-19 10:57:55 -07:00 • committed by David Keitel
parent ef93bf3565
commit c08056b7ad
1 changed files with 2 additions and 1 deletions
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3
include/linux/iommu.h
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@ -43,7 +43,8 @@ struct notifier_block;
#define IOMMU_FAULT_WRITE (1 << 1)
#define IOMMU_FAULT_TRANSLATION (1 << 2)
#define IOMMU_FAULT_PERMISSION (1 << 3)
#define IOMMU_FAULT_TRANSACTION_STALLED (1 << 4)
#define IOMMU_FAULT_EXTERNAL (1 << 4)
#define IOMMU_FAULT_TRANSACTION_STALLED (1 << 5)
typedef int (*iommu_fault_handler_t)(struct iommu_domain *,
struct device *, unsigned long, int, void *);