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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). Cc: Alex Graf <agraf@suse.de> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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Read the documentation in qemu-doc.html or on http://wiki.qemu.org - QEMU team
Description
Original Xbox Emulator for Windows, macOS, and Linux (Active Development)
Readme
GPL-2.0
705 MiB
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