Messages in this thread | | | Date | Tue, 5 May 2015 18:05:41 +0100 | From | Will Deacon <> | Subject | Re: [RFC PATCH] iommu: add ARM short descriptor page table allocator. |
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On Tue, May 05, 2015 at 05:18:02PM +0100, Joerg Roedel wrote: > On Tue, Apr 28, 2015 at 03:41:21PM +0800, Yong Wu wrote: > > This patch is for ARM Short Descriptor Format.It has 2-levels > > pagetable and the allocator supports 4K/64K/1M/16M. > > > > Signed-off-by: Yong Wu <yong.wu@mediatek.com> > > --- > > drivers/iommu/Kconfig | 7 + > > drivers/iommu/Makefile | 1 + > > drivers/iommu/io-pgtable-arm-short.c | 489 +++++++++++++++++++++++++++++++++++ > > drivers/iommu/io-pgtable.c | 4 + > > drivers/iommu/io-pgtable.h | 6 + > > 5 files changed, 507 insertions(+) > > create mode 100644 drivers/iommu/io-pgtable-arm-short.c > > What is the context of this, where will it be used?
I think the MT8173 IOMMU [1] uses this format and, since it's part of the ARM architecture, the ARM SMMU can make use of it too if the implementation supports it.
Will
[1] http://lists.infradead.org/pipermail/linux-mediatek/2015-March/000058.html
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