[PATCH v2] vfio: Include No-IOMMU mode

2015-11-04 Thread Alex Williamson
There is really no way to safely give a user full access to a DMA capable device without an IOMMU to protect the host system. There is also no way to provide DMA translation, for use cases such as device assignment to virtual machines. However, there are still those users that want userspace driv

Re: [RFC PATCH v2] vfio: Include No-IOMMU mode

2015-10-15 Thread Michael S. Tsirkin
On Wed, Oct 14, 2015 at 03:51:18PM -0600, Alex Williamson wrote: > There is really no way to safely give a user full access to a DMA > capable device without an IOMMU to protect the host system. There is > also no way to provide DMA translation, for use cases such as device > assignment to virtual

[RFC PATCH v2] vfio: Include No-IOMMU mode

2015-10-14 Thread Alex Williamson
There is really no way to safely give a user full access to a DMA capable device without an IOMMU to protect the host system. There is also no way to provide DMA translation, for use cases such as device assignment to virtual machines. However, there are still those users that want userspace driv