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Linux Foundation

AIA Virtualization in KVM RISC-V - Advanced Interrupt Architecture Overview

Linux Foundation via YouTube

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Overview

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This talk explains how the RISC-V Advanced Interrupt Architecture supports interrupt virtualization in KVM. It covers the AIA specification and KVM RISC-V support for virtual IPIs, device MSIs, and guest wake-up.

Syllabus

Intro
RISC-V AIA Specification
AIA: Extended local interrupts
AIA: IPIs as software injected MSIs
AIA: Wired interrupts using APLIC direct mode
AIA: Wired interrupts using APLIC MSI mode
AIA Virtualization support
AIA Support in KVM RISC-V
KVM: Virtual IPIs using IMSIC VS-files
KVM: Device MSIs using IMSIC VS-files
KVM: WFI wake-up using IMSIC VS-files
KVM: Updating IMSIC file in VCPU run-loop
AIA Software Status

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Linux Foundation

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