linux-kernel - Re: [PATCH] arm64: defconfig: enable PCIe controller on TI platforms

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Message-Id: <63dc3d1b-ba17-48ee-a02e-83b2903e360a@app.fastmail.com>
Date:   Tue, 09 May 2023 10:28:19 +0200
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Vignesh Raghavendra" <vigneshr@...com>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski@...aro.org>,
        "Achal Verma" <a-verma1@...com>,
        "Catalin Marinas" <catalin.marinas@....com>,
        "Will Deacon" <will@...nel.org>,
        "Bjorn Andersson" <quic_bjorande@...cinc.com>,
        "Geert Uytterhoeven" <geert+renesas@...der.be>,
        "Konrad Dybcio" <konrad.dybcio@...aro.org>,
        Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>, "Mark Brown" <broonie@...nel.org>,
        Rafał Miłecki <rafal@...ecki.pl>,
        "Nishanth Menon" <nm@...com>, "Milind Parab" <mparab@...ence.com>,
        "Swapnil Kashinath Jakhade" <sjakhade@...ence.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: defconfig: enable PCIe controller on TI platforms

On Tue, May 9, 2023, at 10:08, Vignesh Raghavendra wrote:

> Also, see [0] for history. We really want these to be 
> modules unless its necessary for bootup.
>
> You may want to revive [1] and get it to mainline
>
> [0] 
> https://lore.kernel.org/linux-arm-kernel/CAK8P3a2VSBvOn1o+q1PYZaQ6LS9U4cz+DZGuDbisHkwNs2dAAw@mail.gmail.com/
> [1] 
> https://lore.kernel.org/linux-arm-kernel/20230110153805.GA1505901@bhelgaas/

Agreed, that seems simple enough. Ideally these should even
be removable modules, not just single-load but unremovable.

Doing that may require changes to the cadence PCIe host
code if that does not support unloading yet (I have not
checked), but should not require any changes to the core
PCIe host code that supports loadable/removable modules.

     Arnd