Il 09/03/2012 06:01, David Gibson ha scritto: > Currently the pseries machine emulation does not support DMA for emulated > PCI devices, because the PAPR spec always requires a (guest visible, > paravirtualized) IOMMU which was not implemented. Now that we have > infrastructure for IOMMU emulation, we can correct this and allow PCI DMA > for pseries. > > With the existing PAPR IOMMU code used for VIO devices, this is almost > trivial. We use a single DMAContext for each (virtual) PCI host bridge, > which is the usual configuration on real PAPR machines (which often have > _many_ PCI host bridges).
What about virtio? Paolo
