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| author | Will Deacon <will.deacon@arm.com> | 2014-11-14 17:18:23 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2015-01-19 14:46:44 +0000 |
| commit | e1d3c0fd701df831169b116cd5c5d6203ac07f70 (patch) | |
| tree | eb2537042682bf45a36148d06bb0bfb10ce3da74 /drivers/iommu/Kconfig | |
| parent | fdb1d7be7c4d452e9735aeb2b60ae8a2fcf0a514 (diff) | |
| download | lwn-e1d3c0fd701df831169b116cd5c5d6203ac07f70.tar.gz lwn-e1d3c0fd701df831169b116cd5c5d6203ac07f70.zip | |
iommu: add ARM LPAE page table allocator
A number of IOMMUs found in ARM SoCs can walk architecture-compatible
page tables.
This patch adds a generic allocator for Stage-1 and Stage-2 v7/v8
long-descriptor page tables. 4k, 16k and 64k pages are supported, with
up to 4-levels of walk to cover a 48-bit address space.
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/iommu/Kconfig')
| -rw-r--r-- | drivers/iommu/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index 3faaa41db8ff..306454fbc52d 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -19,6 +19,15 @@ menu "Generic IOMMU Pagetable Support" config IOMMU_IO_PGTABLE bool +config IOMMU_IO_PGTABLE_LPAE + bool "ARMv7/v8 Long Descriptor Format" + select IOMMU_IO_PGTABLE + help + Enable support for the ARM long descriptor pagetable format. + This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page + sizes at both stage-1 and stage-2, as well as address spaces + up to 48-bits in size. + endmenu config OF_IOMMU |