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Merge branch 'for-joerg/arm-smmu/updates' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into arm/smmu

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Joerg Roedel
2017-04-07 18:23:01 +02:00
parent a71c9a1c77 022f4e4f31
commit acf7f76b64
7 changed files with 280 additions and 128 deletions
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11
include/linux/iommu.h
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@@ -32,10 +32,13 @@
#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.
* Where the bus hardware includes a privilege level as part of its access type
* markings, and certain devices are capable of issuing transactions marked as
* either 'supervisor' or 'user', the IOMMU_PRIV flag requests that the other
* given permission flags only apply to accesses at the higher privilege level,
* and that unprivileged transactions should have as little access as possible.
* This would usually imply the same permissions as kernel mappings on the CPU,
* if the IOMMU page table format is equivalent.
*/
#define IOMMU_PRIV (1 << 5)