Publication

Rethinking IOMMU for Future IO Devices

2025

Abstract

IO address translation has become a roadblock for high-speed IO devices to saturate their maximum bandwidth, as the aggregated IO working set can easily exceed the IOTLB coverage, leading to performance overhead of IO page table walks. Inspired by recent core-side virtual memory approaches that lower the OS-level virtual memory areas (VMAs) into hardware to solve the TLB coverage problem, we propose to introduce VMAs into IO address translation with a VMA-granule centralized translation caching design that can achieve both higher performance and stronger security guarantees.

Official source

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2025

Abstract

Official source

Related concepts (32)

Internet of things

The Internet of things (IoT) describes devices with sensors, processing ability, software and other technologies that connect and exchange data with other devices and systems over the Internet or other communications networks. The Internet of things encompasses electronics, communication and computer science engineering. Internet of things has been considered a misnomer because devices do not need to be connected to the public internet, they only need to be connected to a network, and be individually addressable.

Virtual memory

In computing, virtual memory, or virtual storage, is a memory management technique that provides an "idealized abstraction of the storage resources that are actually available on a given machine" which "creates the illusion to users of a very large (main) memory". The computer's operating system, using a combination of hardware and software, maps memory addresses used by a program, called virtual addresses, into physical addresses in computer memory.

Input–output memory management unit

In computing, an input–output memory management unit (IOMMU) is a memory management unit (MMU) connecting a direct-memory-access–capable (DMA-capable) I/O bus to the main memory. Like a traditional MMU, which translates CPU-visible virtual addresses to physical addresses, the IOMMU maps device-visible virtual addresses (also called device addresses or memory mapped I/O addresses in this context) to physical addresses. Some units also provide memory protection from faulty or malicious devices.