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VFIO - “Virtual Function I/O” — The Linux Kernel documentation

docs.kernel.org · 4,317 words · saved by 1 readers

Many modern systems now provide DMA and interrupt remapping facilities to help ensure I/O devices behave within the boundaries they’ve been allotted. This includes x86 hardware with AMD-Vi and Intel VT-d, POWER systems with Partitionable Endpoints (PEs) and embedded PowerPC systems such as Freescale PAMU. The VFIO driver is an IOMMU/device agnostic framework for exposing direct device access to userspace, in a secure, IOMMU protected environment. In other words, this allows safe [2], non-privileged, userspace drivers.

VFIO - “Virtual Function I/O” — The Linux Kernel documentation The Linux Kernel 7.1.0 Quick search Contents Development process Submitting patches Code of conduct Maintainer handbook All development-process docs Core API Driver APIs General information for driver authors Useful support libraries Early Userspace Kernel Connector Bus-Independent Device Accesses Device Frequency Scaling Buffer Sharing and Synchronization (dma-buf) Component Helper for Aggregate Drivers The io_mapping functions Ordering I/O writes to memory-mapped addresses The Userspace I/O HOWTO VFIO Mediated devices VFIO

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