Re: [PATCH v12] firmware: google: Implement cbmem in sysfs driver

From: Greg KH
Date: Thu Oct 06 2022 - 02:32:47 EST

On Wed, Oct 05, 2022 at 04:26:55PM -0700, Julius Werner wrote:
> > If the kernel is reporting a value, that value needs to be documented
> > somewhere. If the kernel is acting on that value, it needs to know what
> > those values are.
> >
> > In this specific instance it seems that the kernel knows a subset of the
> > values, and some random userspace tool knows all of them? Think about
> > what you would want to see here if you knew nothing about this at all.
> The kernel doesn't know any of the values. The kernel is just telling
> userspace that spaces with these IDs exist and providing an interface
> to access them, it's not supposed to know what any of them mean.

Ah, ok, that was not obvious to me, sorry. If the kernel is just a
pass-through, no objections.


greg k-h