[Qemu-devel] [PATCH 0/3] iommu: isa dma engine support

[Jason Baron <jbaron@redhat.com>]

Hi,

Based on Benjamin Herrenschmidt's iommu series - these patches provide
infrastructure for a chipset topology where an iommu can sit between
main memory and the isa dma engine. The idea is remap addresses according
to the iommu's wish when we are performing a dma engine r/w operation.

Since the iommu context is tied to the isa device structure, it can be set
independently of the bus on which the isa device resides. Thus, I'm hoping that
this patchset allows us to correctly model more complex chipset topologies.

Thanks,

-Jason


Jason Baron (3):
  iommu: remove extra 'typedef struct DMAContext'
  iommu: add support for the isa dma engine
  iommu: add generic mapping support for the isa bus

 dma.h        |    5 ++---
 hw/cs4231a.c |    2 +-
 hw/dma.c     |   19 ++++++++++++-------
 hw/fdc.c     |   10 +++++-----
 hw/gus.c     |    2 +-
 hw/isa-bus.c |   14 ++++++++++++++
 hw/isa.h     |    9 ++++++++-
 hw/sb16.c    |    4 ++--
 hw/sun4m.c   |    2 +-
 hw/sun4u.c   |    2 +-
 10 files changed, 47 insertions(+), 22 deletions(-)