Re: [PATCH 0/8] riscv: AIA: kernel-irqchip=off support

[Yong-Xuan Wang <yongxuan.wang@sifive.com>]

Hi Kashyap,

On Tue, Feb 18, 2025 at 11:53 PM Kashyap Chamarthy <kchamart@redhat.com> wrote:
>
> 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
>

Sure. I would add them into the next version. Thank you!

Regards,
Yong-Xuan