Re: [PATCH v2 22/22] docs/system: riscv: Document AIA options for virt machine

[Alistair Francis]

On Thu, Sep 2, 2021 at 10:07 PM Anup Patel <anup.patel@wdc.com> wrote:
>
> We have two new machine options "aia" and "aia-guests" available
> for the RISC-V virt machine so let's document these options.
>
> Signed-off-by: Anup Patel <anup.patel@wdc.com>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  docs/system/riscv/virt.rst | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>
> diff --git a/docs/system/riscv/virt.rst b/docs/system/riscv/virt.rst
> index fa016584bf..373645513a 100644
> --- a/docs/system/riscv/virt.rst
> +++ b/docs/system/riscv/virt.rst
> @@ -63,6 +63,22 @@ The following machine-specific options are supported:
>    When this option is "on", ACLINT devices will be emulated instead of
>    SiFive CLINT. When not specified, this option is assumed to be "off".
>
> +- aia=[none|aplic|aplic-imsic]
> +
> +  This option allows selecting interrupt controller defined by the AIA
> +  (advanced interrupt architecture) specification. The "aia=aplic" selects
> +  APLIC (advanced platform level interrupt controller) to handle wired
> +  interrupts whereas the "aia=aplic-imsic" selects APLIC and IMSIC (incoming
> +  message signaled interrupt controller) to handle both wired interrupts and
> +  MSIs. When not specified, this option is assumed to be "none" which selects
> +  SiFive PLIC to handle wired interrupts.
> +
> +- aia-guests=nnn
> +
> +  The number of per-HART VS-level AIA IMSIC pages to be emulated for a guest
> +  having AIA IMSIC (i.e. "aia=aplic-imsic" selected). When not specified,
> +  the default number of per-HART VS-level AIA IMSIC pages is 0.
> +
>  Running Linux kernel
>  --------------------
>
> --
> 2.25.1
>
>