On Wed, Feb 02, 2022 at 08:05:23AM +0100, Greg KH wrote:

I see different platform patches trying to stick these blobs in
different locations and ways to access (securityfs, sysfs, char device
node), which seems crazy to me.  Why can't we at least pick one way to
access these to start with, and then have the filesystem layout be
platform-specific as needed, which will give the correct hints to
userspace as to what it needs to do here?

Which other examples are you thinking of? I think this conversation may 
have accidentally become conflated with a different prior one and now 
we're talking at cross purposes.