linux-kernel - Re: [PATCH v2 09/10] riscv: dts: renesas: Add Andes PMU extension

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Message-ID: <CAMuHMdW1Ua4skxtT+9kyoSDiqt2kNiNG-1jHE8rf4+b14hX4Vg@mail.gmail.com>
Date:   Fri, 20 Oct 2023 09:32:45 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Yu Chien Peter Lin <peterlin@...estech.com>
Cc:     magnus.damm@...il.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, linux-renesas-soc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        prabhakar.mahadev-lad.rj@...renesas.com, tim609@...estech.com,
        dylan@...estech.com, locus84@...estech.com, dminus@...estech.com
Subject: Re: [PATCH v2 09/10] riscv: dts: renesas: Add Andes PMU extension

Hi Peter,

On Thu, Oct 19, 2023 at 4:05 PM Yu Chien Peter Lin
<peterlin@...estech.com> wrote:
> Add "xandespmu" to ISA extensions, the SBI PMU driver will
> probe the extension and use the non-standard irq source.
>
> Signed-off-by: Yu Chien Peter Lin <peterlin@...estech.com>
> ---
> Changes v1 -> v2:
>   - New patch

Thanks for your patch!

> --- a/arch/riscv/boot/dts/renesas/r9a07g043f.dtsi
> +++ b/arch/riscv/boot/dts/renesas/r9a07g043f.dtsi
> @@ -26,7 +26,7 @@ cpu0: cpu@0 {
>                         riscv,isa = "rv64imafdc";
>                         riscv,isa-base = "rv64i";
>                         riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
> -                                              "zifencei", "zihpm";
> +                                              "zifencei", "zihpm", "xandespmu";
>                         mmu-type = "riscv,sv39";
>                         i-cache-size = <0x8000>;
>                         i-cache-line-size = <0x40>;

This extension is not documented in
Documentation/devicetree/bindings/riscv/extensions.yaml. Perhaps it was
introduced in an earlier patch in the series, to which I was not CCed?

Threading is broken, so I can't easily find the whole series in lore:
https://lore.kernel.org/all/20231019140232.3660375-1-peterlin@andestech.com/

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds