linux-kernel - Re: [PATCH v1 1/2] RISC-V: Provide a framework for parsing multi-letter ISA extensions

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Message-ID: <e20a52cf-69cf-747d-7cfb-0a2b58008ce4@canonical.com>
Date:   Sat, 25 Dec 2021 11:11:15 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Atish Patra <atishp@...shpatra.org>, linux-kernel@...r.kernel.org
Cc:     Atish Patra <atishp@...osinc.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Anup Patel <anup@...infault.org>,
        Damien Le Moal <damien.lemoal@....com>,
        devicetree@...r.kernel.org, Jisheng Zhang <jszhang@...nel.org>,
        linux-riscv@...ts.infradead.org,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH v1 1/2] RISC-V: Provide a framework for parsing
 multi-letter ISA extensions

On 24/12/2021 22:16, Atish Patra wrote:
> Recently, there were 15 specifications/40 ISA extensions were ratified.
> Except hypervisor ('H') extension, all of them are multi-letter extensions.
> Going forward, there will be more number of multi-letter extensions as
> well. Parsing all of these extensions from ISA string is not scalable.
> Thus, this patch provides a DT based framework to for easy parsing and
> querying of any ISA extensions. It facilitates custom user visible strings
> for the ISA extensions via /proc/cpuinfo as well.
> 
> Currently, there are no platforms with heterogeneous Linux capable harts.
> That's why, this patch supports only a single DT node which can only work
> for systems with homogeneous harts. To support heterogeneous systems, this
> cpu node must be a subnode for each cpu.
> 
> Signed-off-by: Atish Patra <atishp@...osinc.com>

Your from address does not match SoB. Please use consistent one - they
must match.


Best regards,
Krzysztof