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To:     Anup Patel <apatel@ventanamicro.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Frank Rowand <frowand.list@gmail.com>,
        Conor Dooley <conor+dt@kernel.org>
Cc:     Marc Zyngier <maz@kernel.org>,
        =?utf-8?B?QmrDtnJuIFTDtnBlbA==?= <bjorn@kernel.org>,
        Atish Patra <atishp@atishpatra.org>,
        Andrew Jones <ajones@ventanamicro.com>,
        Sunil V L <sunilvl@ventanamicro.com>,
        Saravana Kannan <saravanak@google.com>,
        Anup Patel <anup@brainfault.org>,
        linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org, Anup Patel <apatel@ventanamicro.com>
Subject: Re: [PATCH v11 08/14] irqchip/riscv-imsic: Add support for platform
 MSI irqdomain
In-Reply-To: <20231023172800.315343-9-apatel@ventanamicro.com>
References: <20231023172800.315343-1-apatel@ventanamicro.com>
 <20231023172800.315343-9-apatel@ventanamicro.com>
Date:   Wed, 25 Oct 2023 21:56:47 +0200
Message-ID: <87edhi5vcw.ffs@tglx>
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List-ID: <linux-kernel.vger.kernel.org>
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On Mon, Oct 23 2023 at 22:57, Anup Patel wrote:
> The Linux platform MSI support requires a platform MSI irqdomain so
> let us add a platform irqchip driver for RISC-V IMSIC which provides
> a base IRQ domain and platform MSI domain. This driver assumes that
> the IMSIC state is already initialized by the IMSIC early driver.

Please no. The platform MSI cruft is really a horrible concept and there
is ongoing work (sadly mightily delayed) to convert the main (ab)user
ARM over to per device MSI domains.

  https://lore.kernel.org/r/20221121135653.208611233@linutronix.de