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| author | Eric Auger <eric.auger@redhat.com> | 2017-01-19 20:57:48 (GMT) |
|---|---|---|
| committer | Xie Xiaobo <xiaobo.xie@nxp.com> | 2017-09-25 07:25:44 (GMT) |
| commit | 1e6de8d364806cf2c71e604aca9e86e473127b79 (patch) | |
| tree | 7be4e1e9155eb3c45d09f3115f30d906ac6950c5 /include/linux | |
| parent | c296d3db17d4cde34e68939a438ced8e1e0c223f (diff) | |
| download | linux-1e6de8d364806cf2c71e604aca9e86e473127b79.tar.xz | |
iommu: Add a new type field in iommu_resv_region
We introduce a new field to differentiate the reserved region
types and specialize the apply_resv_region implementation.
Legacy direct mapped regions have IOMMU_RESV_DIRECT type.
We introduce 2 new reserved memory types:
- IOMMU_RESV_MSI will characterize MSI regions that are mapped
- IOMMU_RESV_RESERVED characterize regions that cannot by mapped.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com>
Tested-by: Bharat Bhushan <bharat.bhushan@nxp.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/iommu.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 7f6ebd0..3a6f0d1 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -117,18 +117,25 @@ enum iommu_attr { DOMAIN_ATTR_MAX, }; +/* These are the possible reserved region types */ +#define IOMMU_RESV_DIRECT (1 << 0) +#define IOMMU_RESV_RESERVED (1 << 1) +#define IOMMU_RESV_MSI (1 << 2) + /** * struct iommu_resv_region - descriptor for a reserved memory region * @list: Linked list pointers * @start: System physical start address of the region * @length: Length of the region in bytes * @prot: IOMMU Protection flags (READ/WRITE/...) + * @type: Type of the reserved region */ struct iommu_resv_region { struct list_head list; phys_addr_t start; size_t length; int prot; + int type; }; #ifdef CONFIG_IOMMU_API |