On Mon, Feb 17, 2025 at 04:17:20PM +0800, Yong-Xuan Wang wrote: > This series introduces the user-space AIA MSI emulation when using KVM > acceleration. > > After this series, RISC-V QEMU virt machine with KVM acceleration has > 3 parameters to control the type of irqchip and its emulation method: > - Machine prop "aia" controls the type of irqchip > - none: use PLIC and emulated in user-space > - aplic: use AIA wired and emulated in user-space > - aplic-imsic: use AIA MSI, emulation mode is determined by > "kernel-irqchip" and "riscv-imsic" > - Accel prop "kernel-irqchip", effective with AIA MSI > - on: in-kernel APLIC and in-kernel IMSIC > - off: user-space APLIC and user-space IMSIC > - split: user-space APLIC and in-kernel IMSIC > - Accel prop "kernel-irqchip", effective with in-kernel IMSIC > - emul: use MRIF as in-kernel IMSIC > - hw: use hardware guest IMSIC file as in-kernel IMSIC > - auto: use the hardware guest IMSICs whenever available otherwise > fallback to MRIF
Hi; as someone new to the RISC-V ecosystem, most of these acronyms feel impenetrable :-) I see they're all RISC-V interrupt-handling related terms. I hope you don't mind my spelling them out here: - AIA : Advanced Interrupt Architecture - MSI : Message Signaled Interrupts - PLIC : Platform-Level Interrupt Controller - APLIC : Advanced Platform Level Interrupt Controller - IMSIC : Incoming Message Signaled Interrupt Controller - MRIF : Message Routed Interrupt Facility [...] -- /kashyap
