linux-kernel - Re: [PATCH v4 17/19] riscv: dts: starfive: Add initial StarFive JH7110 device tree

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Message-ID: <Y/T5eL4s8FSlbgQh@spud>
Date:   Tue, 21 Feb 2023 17:03:52 +0000
From:   Conor Dooley <conor@...nel.org>
To:     Hal Feng <hal.feng@...rfivetech.com>
Cc:     linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-riscv@...ts.infradead.org, Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Ben Dooks <ben.dooks@...ive.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Emil Renner Berthing <emil.renner.berthing@...onical.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 17/19] riscv: dts: starfive: Add initial StarFive
 JH7110 device tree

On Tue, Feb 21, 2023 at 10:46:43AM +0800, Hal Feng wrote:

> +		S7_0: cpu@0 {
> +			compatible = "sifive,s7", "riscv";
> +			reg = <0>;
> +			d-cache-block-size = <64>;
> +			d-cache-sets = <64>;
> +			d-cache-size = <8192>;
> +			d-tlb-sets = <1>;
> +			d-tlb-size = <40>;
> +			device_type = "cpu";
> +			i-cache-block-size = <64>;
> +			i-cache-sets = <64>;
> +			i-cache-size = <16384>;
> +			i-tlb-sets = <1>;
> +			i-tlb-size = <40>;
> +			mmu-type = "riscv,sv39";
> +			next-level-cache = <&ccache>;
> +			riscv,isa = "rv64imac_zicsr_zba_zbb";

I still think that adding just zicsr here is pointless. If you're going
to be specific, why not also mention that you have zifencei too?

> +			tlb-split;
> +			status = "disabled";
> +
> +			cpu0_intc: interrupt-controller {
> +				compatible = "riscv,cpu-intc";
> +				interrupt-controller;
> +				#interrupt-cells = <1>;
> +			};
> +		};

Rest of this looks fine to me though, thanks for adding the s7
compatible and zba/zbb :)


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