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authorWill Deacon <will.deacon@arm.com>2014-11-14 20:18:23 +0300
committerWill Deacon <will.deacon@arm.com>2015-01-19 17:46:44 +0300
commite1d3c0fd701df831169b116cd5c5d6203ac07f70 (patch)
treeeb2537042682bf45a36148d06bb0bfb10ce3da74 /drivers/iommu/Kconfig
parentfdb1d7be7c4d452e9735aeb2b60ae8a2fcf0a514 (diff)
downloadlinux-e1d3c0fd701df831169b116cd5c5d6203ac07f70.tar.xz
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/Kconfig9
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