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Date:   Thu, 5 Aug 2021 21:28:42 +0200
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     "Kuppuswamy, Sathyanarayanan" 
        <sathyanarayanan.kuppuswamy@linux.intel.com>
Cc:     Dan Williams <dan.j.williams@intel.com>,
        Andi Kleen <ak@linux.intel.com>,
        "Rafael J . Wysocki" <rafael@kernel.org>,
        Jonathan Corbet <corbet@lwn.net>,
        Kuppuswamy Sathyanarayanan <knsathya@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Doc Mailing List <linux-doc@vger.kernel.org>
Subject: Re: [PATCH v1] driver: base: Add driver filter support
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On Thu, Aug 05, 2021 at 12:08:52PM -0700, Kuppuswamy, Sathyanarayanan wrote:
> 
> 
> On 8/5/21 12:01 PM, Dan Williams wrote:
> > What's wrong with the generic authorized proposal? The core can
> > default to deauthorizing devices on the platform bus, or any bus,
> > unless on an allow list. It's a bit more work to uplevel the local
> > "authorized" implementations from USB and Thunderbolt to the core, but
> > it's functionally identical to the "filter" approach in terms of
> > protection, i.e. avoiding probe of unnecessary unvetted drivers.
> 
> I have not yet read about the "authorized" model in USB and Thunderbolt.
> So bear with me if my question is basic or obvious. In the case USB
> authorized model, who maintains the allow list? kernel or userspace?

Please go read the documentation and don't ask others to do your work
for you...