linux-kernel - Re: [PATCH v4 1/2] firmware: google: Expose CBMEM over sysfs

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Date:   Tue, 30 Jun 2020 17:22:57 -0700
From:   Julius Werner <jwerner@...omium.org>
To:     Stephen Boyd <swboyd@...omium.org>
Cc:     Julius Werner <jwerner@...omium.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Patrick Rudolph <patrick.rudolph@...ements.com>,
        Coreboot <coreboot@...eboot.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alexios Zavras <alexios.zavras@...el.com>,
        Allison Randal <allison@...utok.net>,
        Samuel Holland <samuel@...lland.org>
Subject: Re: [PATCH v4 1/2] firmware: google: Expose CBMEM over sysfs

> Ok. Regardless of the concern of the physical address is there any usage
> of this attribute by userspace? The description makes it sound like it's
> a pure debug feature, which implies that it should be in debugfs and not
> in sysfs.

I'll leave that up to Patrick. I doubt we'd want to create a whole
separate debugfs hierarchy just for this. Like I said you can just
read it out of the log too, this would just make it a little bit more
convenient. It's not like it would be the only informational attribute
in sysfs...