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SubjectRe: [PATCH] vfio powerpc: enabled on powernv platform
Hi Alex,

I posted other pair of patches. While debugging and testing my stuff I
implemented some rough hack to support IOMMU mappings without passing those
hypercalls to the QEMU, this is why I moved pieces of code around - want to
support both QEMU-VFIO and kernel optimized H_PUT_TCE handler.

On 12/12/12 23:34, Alexey Kardashevskiy wrote:
> This patch initializes IOMMU groups based on the IOMMU
> configuration discovered during the PCI scan on POWERNV
> (POWER non virtualized) platform. The IOMMU groups are
> to be used later by VFIO driver (PCI pass through).
> It also implements an API for mapping/unmapping pages for
> guest PCI drivers and providing DMA window properties.
> This API is going to be used later by QEMU-VFIO to handle
> h_put_tce hypercalls from the KVM guest.
> Although this driver has been tested only on the POWERNV
> platform, it should work on any platform which supports
> TCE tables.
> To enable VFIO on POWER, enable SPAPR_TCE_IOMMU config
> option and configure VFIO as required.
> Cc: David Gibson <>
> Signed-off-by: Alexey Kardashevskiy <>
> ---


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