tree 6c7ff9d97ccd3acb87ec32d5915b0e1433690d84
parent da6ccee4184482b45a2cb562c7373639792fc58d
author Alexey Kardashevskiy <aik@ozlabs.ru> 1401168992 +1000
committer Alexander Graf <agraf@suse.de> 1402917879 +0200

spapr_pci: spapr_iommu: Make DMA window a subregion

Currently the default DMA window is represented by a single MemoryRegion.
However there can be more than just one window so we need
a "root" memory region to be separated from the actual DMA window(s).

This introduces a "root" IOMMU memory region and adds a subregion for
the default DMA 32bit window. Following patches will add other
subregion(s).

This initializes a default DMA window subregion size to the guest RAM
size as this window can be switched into "bypass" mode which implements
direct DMA mapping.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>