linux-kernel - Re: [PATCH v1] driver: base: Add driver filter support

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Message-ID: <9b2956f5-3acf-e798-ff0f-002d2d5254db@linux.intel.com>
Date:   Thu, 5 Aug 2021 14:10:08 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Kuppuswamy Sathyanarayanan <knsathya@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>
Subject: Re: [PATCH v1] driver: base: Add driver filter support

On 8/5/2021 12:01 PM, Dan Williams wrote:

>> That's why I think the builtin allow list hook is still needed. Thoughts?
> I see nothing that prevents a built-in allow list to augment the
> driver-core default. Is there a gap I'm missing?

Okay so you're suggesting to build the builtin allow list on top of the 
existing framework?

I thought Greg's suggestion was to only rely on user space only.

But if we have a way to change the authorized defaults by device (not 
just bus) from inside the kernel at early boot that could well work.

Doing it only on the bus level I suspect wouldn't work though.

-Andi