linux-kernel - Re: [[RFC PATCH v1] 1/1] PCI: Add pci=nobbn to ignore ACPI _BBN method to override host bridge bus window

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Message-ID: <87muandp8m.fsf@nanos.tec.linutronix.de>
Date:   Thu, 16 Jan 2020 23:13:13 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Nicholas Johnson <nicholas.johnson-opensource@...look.com.au>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [[RFC PATCH v1] 1/1] PCI: Add pci=nobbn to ignore ACPI _BBN method to override host bridge bus window

Nicholas,

Nicholas Johnson <nicholas.johnson-opensource@...look.com.au> writes:

> Add pci=nobbn kernel parameter.
>
> Override the host bridge bus resource to [bus 00-ff] when specified.

Fine, but you completely fail to explain why this is useful and why
someone would utilize this command line parameter.

Thanks,

        tglx