linux-kernel - Re: WMI and Kernel:User interface

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Message-ID: <20170510232747.GE11404@fury>
Date:   Wed, 10 May 2017 16:27:47 -0700
From:   Darren Hart <dvhart@...radead.org>
To:     Mario.Limonciello@...l.com
Cc:     gregkh@...uxfoundation.org, torvalds@...ux-foundation.org,
        pali.rohar@...il.com, andriy.shevchenko@...ux.intel.com,
        rjw@...ysocki.net, luto@...capital.net,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org
Subject: Re: WMI and Kernel:User interface

On Wed, May 10, 2017 at 10:02:46PM +0000, Mario.Limonciello@...l.com wrote:
> This above discussion is confusing because it's referring specifically to "WMI events".
> related to brightness keypresses that don't make sense to go to userspace.

Let's elaborate on this point. Why are events not interesting to user space?

I don't think it would be too problematic to create a chardev for an Event GUID,
give platform drivers first chance to handle an event, and pass it up to
userspace for exported GUIDs if the kernel doesn't consume the event.

-- 
Darren Hart
VMware Open Source Technology Center