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3 Commits

Author SHA1 Message Date
Joerg Roedel
2e169bb3cc iommu/io-pgtable-arm: Move init-fn declarations to io-pgtable.h 
Avoid extern declarations in c files.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
 2015-08-13 19:51:04 +02:00
Will Deacon
e1d3c0fd70 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>
 2015-01-19 14:46:44 +00:00
Will Deacon
fdb1d7be7c iommu: introduce generic page table allocation framework 
This patch introduces a generic framework for allocating page tables for
an IOMMU. There are a number of reasons we want to do this:

  - It avoids duplication of complex table management code in IOMMU
    drivers that use the same page table format

  - It removes any coupling with the CPU table format (and even the
    architecture!)

  - It defines an API for IOMMU TLB maintenance

Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
 2015-01-19 14:46:43 +00:00