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Date:   Sun, 1 Oct 2023 23:27:00 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     Anup Patel <apatel@ventanamicro.com>
Cc:     Paolo Bonzini <pbonzini@redhat.com>,
        Atish Patra <atishp@atishpatra.org>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Conor Dooley <conor@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Shuah Khan <shuah@kernel.org>,
        Andrew Jones <ajones@ventanamicro.com>,
        Mayuresh Chitale <mchitale@ventanamicro.com>,
        devicetree@vger.kernel.org, kvm@vger.kernel.org,
        kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org,
        linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH 1/7] RISC-V: Detect XVentanaCondOps from ISA string
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References: <20230919035343.1399389-1-apatel@ventanamicro.com>
 <20230919035343.1399389-2-apatel@ventanamicro.com>
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On Tue, Sep 19, 2023 at 09:23:37AM +0530, Anup Patel wrote:
> The Veyron-V1 CPU supports custom conditional arithmetic and
> conditional-select/move operations referred to as XVentanaCondOps
> extension. In fact, QEMU RISC-V also has support for emulating
> XVentanaCondOps extension.
> 
> Let us detect XVentanaCondOps extension from ISA string available
> through DT or ACPI.

Umm, I though Linux/riscv would never support vendor specific
extensions?